Balsa resine epoxy

balsa resine epoxy The lack of brittleness allows for lasting bonds on materials like balsa wood and glass as well as works on metal and foam. Repair Paste & Fillers. 99 $ 53 . home building supplies glues,filler,epoxy,resin balsa cement. . Overview: This panel was just a way to throw some balsa into the mix and compare infusing balsa with foam. 60 size airplane. Balsa exhibits very high sheer strength properties and transfers stress from one skin to the other very well. Using the paintbrush, coat one of each pair of pieces with epoxy resin. I have observed that more traditional brands still use balsa and more modern and technical boats use almost all some kind of hi-tech foam and epoxy or vinilester resins. 4 Bonding End Grain Balsa Core with Epoxy Resin Systems Vacuum bag compaction is recommended when bonding BALTEK®core to a laminate surface using epoxy resins, as vacuum bagging provides the most weight efficient bond line consolidation. Fiber orientation and bending schedules are based on design or engineering specifications to best meet weight and strength objectives, stress and impact loads, and other design parameters. 5lb Baltek End-Grain Balsa Core; Panel weight: 16. The resin and hardener must be mixed together and applied. Phone 023 8086 1541. Using AL600 Balsa, it's my understanding that this core material saves on epoxy because it's already pre-coated. After the epoxy resin set, we stood the piece on end and generously applied CPES tinted black with resin dye to the top end. The p roprieties characterization of the wood and composites shows that, the DR CRAFTY Clear Epoxy Resin Kit Art Resin Epoxy Clear Resin 2 Part Epoxy Resin Crystal Clear Casting Resin Jewelry Resin 32 Ounce Kit with Bonus Measuring Cups, Plastic Spreader and Wooden Sticks 4. 53in / 13. Due to its excellent fire resistance the product can be used in demanding applications such as building, public transport and railways. More information on the design of the epoxy NRT blade can be found in Ref. It is possible to add mineral fillers to modify its properties getting a cheaper or tougher epoxy film. Compatible with polyester, vinylester and epoxy. The most common methods use either polyester or epoxy resin and catalysts. Epoxy: This is high-performance resin, with a matching price tag. For composite boats, that could be true also. Then place the balsa sheet on the mold, fiberglass side up, and put the 1/2 foam sheet on top of that. Spars ~ "I" beam 1/8" & 1/4" Birch & Liteply w/ CF tubes. Suitable for elevated temperature-cure prepreg systems; Ideal for wind and maring applications. One each 2oz (59ml) bottle of Hardener and Resin. The bamboo is applied with epoxy resin using a vacuum bag technique that conforms the bamboo to the shape of the deck. Standard core for many OEM boatbuilders. Balsa is often pretreated to The bow has been carved from dense foam. Lighter and more efficient than traditional materials, composites provide a perfect solution for many industries. An odd combination, but very sturdy! What I would like to do is to then cover the structure with thin tissue or similar material and a resin or epoxy of some kind. Calculating balsa density: Knowing the density of your balsa is a very important part of building correctly. Photos are talen from the build thread reach vis the button at top of page. You can however, overdo it and suck out too much resin – like this: Laminate Sample #5: Vacuum Bagged Epoxy Wet-layup Carbon/Glass on Corecell! Bagged wet layup is probably best used for low volume parts on tooling that is either not 100% vacuum tight (for infusion) or not up to high temperature service (pre-preg). Lay a sheet of paper towel on top and press down to blot up the excess. Shop, read reviews, or ask questions about Resins, Fillers & Fiberglass at the official West Marine online store. Add 10cc of 90% alcohol and mix until the resin becomes clear again. The panel consists of a 1/2-inch balsa core with skins hand laid from three-layers of 17-ounce triaxial fiberglass cloth, using West Systems epoxy. The video below demonstrates how the cedar-stripped boat hull is completed Gurit introduced new balsa and PET core materials and a new low toxicity epoxy laminating system at JEC World 2018 in Paris on 6-8 March. It is a two-part resin having a catalyst that I believe is peroxide based. It can be used for applying fiberglass cloth to wood or by itself to give wood a surface ready for primer and paint. Mix up some epoxy, probably not more than a few ounces, and work it into the fiberglass until it is all saturated. sandwich structures made of E-glass fiber/epoxy skins and the same balsa core were also prepared and tested for and epoxy resin Araldite LY5052. The cured epoxy is resistant to most chemicals. “That would be too heavy and inflexible. All of us at Balsa USA would like to thank every one of our loyal customers for your continued support over the years. Mais attention : ce qui peut sembler relativement bon marché à première vue pourrait vous coûter très cher sur le long terme ! A scrap of balsa makes a handy stirring stick. Thin epoxy is usually a laminating resin that is optimized for hardness and low viscosity, not for high adhesive strength. Vacuum Bagging & Infusion. package 1,5 – 4,5 – 30 kg (A+B) Epoxy resin, thinned 50% with denatured alcohol. Mixable with all C-Systems additives. Baltek Balsa - End Grain, Contourable Contact us. If you like building engines and bodies for remote-controlled vehicles (airplanes), then this will definitely help you out, just by learning how to apply simple fiberglass to the balsa wood parts of the RC airplane body. I also dislike polyester resin because it really smells foul. 5x14. The epoxy resin market is dominated by the Asia-Pacific region, which contributes 55. Formulated to bond fiberglass to wood and foam Odorless and non-brittle Sand easily to a smooth finish Total working time of this resin is 20-30 minutes, and it fully cures in 3 hours completely clearThis product contains epoxy resin and The balsa pieces were 3/4" so i am thinking 3/4" dow foam followed by some urethane liquid foam for the gaps. Rotor blades are not made of steel. EXPERIMENTAL PROCEDURE he sandwich composite specimens were fabricated using skins of glass fibre/epoxy resin and core of balsa wood The Athena has a carbon fiber fuselage molded in epoxy resin, not cheap polyesters. Balsa-Foam is different from other plastic foams because it can be easily carved with traditional and non-traditional hand tools to create the shape and design you want. [email protected] Epoxy consists of a Base (part A) and a Hardener (Part B). • Essuyez la résine époxy et de la laque mélange plus mince sur le plan de balsa avec une truelle. When fully saturated, go over the surface with a heat gun, and then squeegee off excess epoxy with a playing card from an old deck. The long open times available with epoxies also allow large areas of core material to be bonded at one time. We truly appreciate your business. No change to laminate design values (same strength). If the wood is too big or the resin too thick to cover the whole thing, apply epoxy in a line around the outside edge of the wood. Z-Poxy Finishing Resin is a premium light weight two part epoxy laminating/finishing type resin. Resinous Poured Flooring. Make sure there is no dust in the balsa or you are going to have poor adhesion. EasyCast Clear Casting Epoxy is a two-component, low odor, solvent free, clear casting epoxy. I need it to be light so I plan to use(8) 54x 4 3/4 X1/4 balsa boards with a lot of fiberglass resin. 2021. The real question is: Do you want the epoxy to soak into the balsa (strenght vs. What advantages does this material have over open end grain balsa? What are the disadvantages? I am picturing the bond between the resin I apply and the balsa. However, keep mixing until it is clear again. This Epoxy is used when fiberglassing or fuel-proofing a kit. You should be looking for Lay-up Epoxy. It has extremely high strength and stiffness to weight ratios, and achieves an excellent bond with all types of resins and adhesives. This prevents the joint from being epoxy-starved when the wood soaks epoxy out of the thickened mixture used for gluing. On the top shelf is Aircraft Dope. Zap Z-Poxy Finishing Resin (12oz Set) Contoured ProBalsa Plus is a coated, contourable, endgrain Balsa Wood for use in marine and boatbuilding applications. 23,90€ Note that the aft balsa has been sanded to the contour of the side of the floats. Apply only enough resin to wet the cloth. Epoxy resins. Covering those surfaces is premium Oracover plastic film covering. 10 lb. This resin should be mixed 1 to 1 and then thinned with 91% Isopropyl alcohol. 99. Note that polyester resin does not cure properly over epoxy. Revêtement son en Résine phase aqueuse . This is because the foam core materials do not wet out and absorb the resins as well as end-grain balsa does. On the lower shelf are Finishing Resin, Polyurethanes, Lacquers and a variety of solvents. are commonly used core materials. Drill as indicated on the detail drawing: Finish FINISH-CURE 20 min. 2021. The more drops of the catalyst added to the resin, the faster it cures. Use slow-drying epoxy (30-minute to 4-hour working time) whenever epoxy is called for. Applications include: wind turbine blades, marine hulls and decks, bulkheads, superstructures, floors and interiors, chemical storage tanks, transit vehicles - applications which specify high structural requirements with reduced weight and good cost effectiveness. Merci de vos retours. The 521 Epoxy cures to a high-strength solid, suitable for laminating, bonding, fairing, coating, and reinforcing. Phone # is 800-281-4975 . The wing arrives as two pieces, just needing to be joined with some epoxy to make it 1 piece. After that I covered the entire floor with 2 layers of cloth and lots of epoxy resin. Just use a clean cup and plenty of paper towels. The DuFlex lightweight sandwich panel solution is a composite panel system that minimizes weight and maximizes mechanical properties. Includes: one 1-square yard of 3/4 ounce Fiberglass Cloth. "That would be too heavy and inflexible. Density 6 lb. See full list on epoxyworks. LE ~ 1/4" & 1/8" Birch ply. Laminates of glass fiber, carbon fiber or combination of both are widely used as skin materials in these Sandwich panels. WEST SYSTEM offers two-part (resin and hardener) epoxy systems developed for use in boat building and boat repair. Koch: “We will not heat the epoxy, as it will take a lot of energy to heat all of the materials to the melting point. For all these reasons, I now use Pacer Technology’s Z-Poxy Finishing Resin (#PT40). 33. This high performance epoxy resin is developped for a lot of industrial application. Available in original or balsa colored formulas. The possibilities are endless! Amazing Deep Pour is ideal for river tables, resin blanks for lathe turning, filling wide gaps in wood, or any application requiring a depth greater than 3/8 inch. Easy to use. Epoxy Resin Kit, 32 Oz Clear Epoxy Resin 1:1 Ratio-2 Part Epoxy Casting Resin ,Art Craft Resin Kit for Beginners,Resin Jewelry, Glitter Tumbler 4. Catalyst & Solvents. So why am I having so much trouble finding data or tutorials on how to do it. A variety of paints and solvents. Order Notes: [-] hide notes The resultant weight is less than that of epoxy and the bond is more resiliant and bonds stronger to the airframe than CA. epoxy hardeners; epoxy resins Gurit® Corecell™ T is available in every resin infusion format and is compatible with polyester, vinylester and epoxy resin systems. 604-294-8116. QUIK-CURE™ is the least temperature sensitive of our epoxies. Use of epoxy requires careful attention to the mixing ratio of the [email protected] Glue part no. Cette table sera une oeuvre d'art dans votre pièce. let dry then apply the epoxy resin. 9" stone clay / resin clay / epoxy putty / hinoki veneer sheet / balsa veneer sheet / copper line / plastic/ resin/ Japanese ash Private Collection since 2011 All images copyright TOKYO GOOD IDEA Development Institute Co. - posted in ATM, Optics and DIY Forum: So Im currently designing my first telescope build. The whole Colledani process grants a performing result of class Balsa Floor After grinding the old glass out I epoxied 1/4" end grain balsa down over the old wood, sorry didn't take any pictures with just the balsa down. This clear epoxy resin uses either fast or slow cure speeds enabling users to fine tune a system that meets their working time needs. Don't be tempted to add a little more than the recommended amount of catalyst to speed up the cure time; epoxy doesn’t work like that (its polyester resin that does). It contains industry leading UV stabilizers and is ideal for applications that require low yellowing finishes. so will I be able to use this on a hollow wooden balsa board i am making? or would i need a different Kit? Yes, this Epoxy resin kit is recommended for glassing a wood surfboard. Ribs ~ 1/8" & 1/4" Balsa, Birch & Liteply. 1306 Boundary Road Burnaby, British Columbia V5K 4T6 Canada. You CAN use poly, but you are best to use a Vinylester. Therefore, if you make things like fillets using epoxy and micro-balloons, you may run into problems The balsa is Coated, Contourable, Endgrain Balsa Wood for use in marine and boatbuilding applications. As such, it is excellent for pore filling open grain woods, like Ash, Oak, Mahogany, etc. 4 minute, 5 minute, 20 minute and 1 hour epoxy resin and Z-Poxy finishing resin by Deluxe Materials and Devcon For over 50 years, Sussex Model Centre have been serving the modeller. Vinylester is running about $3. 5lbs cu. Seal your balsa wood surfboard using Solarez® UV cure resin. The end product with resin is better, but labor is more difficult. ft. This is the usual model boat sealing method. It offers the best adhesion and the only resin for building structural elements with carbon and aramid. It achieves an optimum balance of mechanicals and toughness properties by utilizing two phase morphology. Resin Properties. It is easy to use and ideal for casting small decorative items and jewelry in molds. ALSO: the boat had no stringers. Dow Durakane is the BEST resin to stick to old poly . my situation is this the floors of my kurtis are Résine epoxy antidérapant . 5" x 18. Compatible with hand lay-up, vacuum bagging, and resin infusion processes. $29. Gelcoat Gelcoat Outer skin– Alternating mat and roving Inner skin– Alternating mat and roving Core material Alternating layers of mat and woven roving QUIK-CURE™ 5 min. 46. Sheeting ~ 1/8" balsa w/ glass Crystic Resin 5046 is a filled, orthophthalic, pre-accelerated, unsaturated polyester resin used for fire retardant applications. Wing separate outboard of nacelles. is a family owned manufacturer of high-performance seamless floor and wall systems with more than 50 years of experience in the flooring industry. [ 15 ]. Still, the lower cost might be expensive in the long run. For my boats, I use several layers of 3/4 oz cloth with West System epoxy, even on balsa skinned models the hulls finish is really tough and lasts a long time. Page 1 of 2 - Going to try balsa and resin for my tube. Idée cadeau. Plywood, Balsa wood, pigment, epoxy resin. Some of the resins require unequal mix ratios, like 1 part epoxy to 2 parts hardener, which is difficult to measure accurately. ) End grain balsa sheets are often used where high physical properties are required in a composite sandwich core. solarez. -epoxy coating (I used this. I know particularly the Dehler 41 where the cheap version has balsa core and normal resins while the expensive version (lighter and stronger) is made with epoxy resins and top foam core. T-Balsa is Germanischer Lloyd (now DNV GL) approved and has the Forest Alliance Certified seal, that is to say the farms and forests are managed according to rigorous environmental, social and economic criteria designed to conserve wildlife; safeguard soils and waterways; protect wo Z-Poxy Finishing Resin. The results are discussed in terms of load-time, load-displacement and energy-time diagrams. balsa cement. How We Tested We drilled 7/16-inch holes through the top skin and core only. 5lbs cu. ca Self-levelling epoxy resin system with low viscosity, supplied pigmented in any RAL colour, specially designed for flooring. He brought along samples of everything they sell from Balsa to Nida-core. T-Balsa is a low weight core material produced from FSC certified farms and forests of licensed Ecuadorian growers. Sure, a balsa board will ding less if glassed with epoxy as compared to polyester. This resin will blush under conditions of high humidity and temperatures too low for the hardener being used. This core has been at the heart of the marine industry for decades and is fairly inexpensive when a lower property cored laminate is needed. A leaking deck, especially with wood cores, can lead to core rot and eventually delamination of the deck and loss of structural rigidity. Oh, and did I mention that the core of that laminate is balsa wood? Plus, a one-off construction is going to come together much quicker for a wood/epoxy boat since the panels take their shape without mold and fair naturally. - manual Mix up some epoxy finishing resin and spread it through the cloth using a razor blade as a spatula. The global epoxy resin market was valued at approximately $8 billion in 2016. Prénom en fil d'aluminium. It is absolutely the best for sheeting foam wing panels. Wet out the piece of plywood to seal it from moisture. We kept applying the tinted CPES to the top of the wood. TE ~ 1/16" Birch ply. Cut the fiberglass cloth slightly bigger than the surface to be covered. No need for clamping, just get a snug fit. Same for a foam board. in Resine epoxy Auf Facebook teilen Auf Pinterest teilen Auf Twitter teilen S i vous avez déjà travaillé avec de la résine auparavant, vous aurez probablement remarqué, après avoir retiré votre pièce du moule, que la surface n’est pas automatiquement parfaitement lisse et cristalline après le coulage et le durcissement. In foam or balsa cored epoxy/fiberglass laminate boat the skins must take the load - the core has little strength or stiffness. The description says up to 12’ SUP boards. I intend to make the flat bottom and verticle sides from balsa and foam core board. The properties of balsa make it ideal as a core for sandwich construction. Balsa Core 24" x 48" Grid Scored, Standard Density ( 9. Ces marine époxy résine peuvent être appliqués à de nombreux matériaux différents. The Kit Contains: Pint can of A light coat of plain unscented hair spray (which is basically a thin lacquer) on the balsa skins to seal them, then a thin coat of resin on the cores spread with a credit card "trowel" with notches filed in it, then stick it all together and weigh it down till the 6 hours. I guarantee epoxy will peel off balsa LONG before it peels off mat again, not even close. A dry roller will work well to wet the balsa. 99 balsa Description END GRAIN BALSA WOOD CORE High quality composite core material made from end grain balsa Highest strength to weight ratio of any structural core Natural, sustainable and responsibly sourced Gurit® Balsaflex™ is the classic end-grain balsa wood core, featuring very high strength to weight ratio. Should I add some stringers?? Spring 2016. % carbon fibers added for visualization. Colour change indicator with addition of catalyst. 93 (60% more). Je tenterai trichlo et acétone pour commencer, après on va taper dans le Allow 8 hours for full curing. As for epoxy based laminates--yes, they're often worth it and often used in cutting edge racing boats, due to epoxy's greater tensile strength. The built up wing and tail feathers are made of the highest quality balsa available. Its low viscosity and water clear finish makes it perfect for both wood or foam surfboard applications. 16 kg/m2 pour 160g de tissu de verre ; 0. The components that make up Polyester is usually referred to as Resin and Catalyst. )-interior gloss paint (I used Valspar)-painter's tape -wood shims (or something to adjust the levelness of the surface)-thin wood strips (you don't need anymore than 1/4" x 1/8") I used ripped 1/8" ply, but even balsa wood would work, which can be cut with a utility knife! Tools: This is 4oz (118ml) Z-Poxy Finishing Resin from Pacer. Coated with a thin resin film to enhance bond with epoxy from Jamestown Distributors. If you replace the core with balsa or foam and relaminate the top skin with contemporary uncrimped fabric and epoxy you will have a major increase in strength over a 60's production layup of overpromoted polyester and heavy woven rovings - trust me. Epoxy resins have had a reputation for being hard to work since early epoxies were thick, but many modern epoxies are quite liquid. Description 521 Marine Epoxy Resin bonds with fiberglass, metals, wood, and composite fabrics and features superb strength, durability, and moisture resistance. i used the 3M 77 spray the glue on the balsa and they apply the fiberglass cloth. The most common type is used as an adhesive. There is a reason we are still in business for almost 70 years, and that reason is you! The number one job of our full-time technical staff is answering your questions about epoxy and making sure you get satisfactory results when you use our products. Fête des mères CreaMarianne 5 étoiles sur 5 (197) 4,50 € Ajouter aux favoris With epoxy, the hardener and the resin become one compound. There are two kinds of epoxy resin that I know of. Use craft sticks to spread the resin over the cloth, being careful not to wrinkle or move the cloth in the process. com Seem like balsa not only sucks alot of epoxy but also releases gas to cause airbubbles/pinhole during hotcoats. Epoxy resin (the only resin that can be used on EPS foam) is a little stronger than polyester. Sheeting ~ 1/8" balsa w/ glass & epoxy resin Wing. Ideally the wood or plywood surface is coated with 2 coats of an epoxy system using a … It is during this stage that the fins or boxes for removable fins are attached and the leash plug installed. Resin: For plywood boats, epoxy resin is the only choice. EPS foam is produced by feeding tiny polystyrene spears into a machine and then adding steam (with small amounts of pentane gas) to expand the beads and then mold them together. Gurit® Balsaflex™ is the classic end-grain balsa wood core, featuring very high strength to weight ratio. A specially formulated, high gloss and clear resin system for the manufacturing of Windsurfing and Surfboards. 94, de 9h30 à 17h30, du lundi au vendredi Petit pack de résine Epoxy West System 105/205 avec la base liquide 105 et son catalyseur rapide 205, pour bateaux en fibre de verre, bois, aluminium et acier. Pack de 600 gr (500g de résine 105, 100g de durcisseur à prise rapide 205) This done, I cleaned the entire area with acetone and then brushed and rolled a coat of unthickened epoxy resin over the inner deck skin and beneath the flanges, coating all areas. PC11 is compatible with polyester, vinyl ester, and epoxy resin systems. This section pertains only to the adhesive. Attach accessories with machine screws or bolts. Concept Résine a débuté son activité en 1995 ; elle est spécialisée dans la réalisation de revêtements de sols en résine et de sols industriels. Balsa is select quality, kiln-dried, end-grain balsa wood suitable as a structural core material in composite sandwich construction. I've decided to look into other avenues I've always loved the look of a clean balsa floor. SIG Bond Aliphatic Resin Balsa Wood RC Remote Control Airplane Kit Glue SIGSB004 Pacer 8oz Z-Poxy Zpoxy 5 Five Min Minute Epoxy Resin and Hardener Combo PAAPT38 Researchers 3D Print With Epoxy Composites to Mimic Material Properties of Balsa Wood Inspired Engineering to create a printable epoxy-based thermosetting resin. This is done by adding a layer of glass, 3/4 or 1. Balsa’s honeycomb-like cell structure, configured into end-grain panels, provide optimal properties including high compressive, flexural and shear strength along with stiffness. Check out this five-part video tutorial on how to use fiberglass finish over balsa wood for RC airplanes. per cubic ft. Epoxy with glass can be kept very light, the scale R/C model airplane guys use it a lot. Hi DemonDriver AKA Christopher Here, Today I want to show you how I laminate my Styrofoam RC airplane parts with 1/32nd Balsa sheet, You can use 5 Min or 15 SIG Finishing Resin Kit Finishing Resin is a brush-on polyester surfacing resin designed exclusively for sealing balsa wood and creating a super smooth durable base for epoxy or enamel paint . Coast Fiber-Tek Products Ltd. Im building a 10 f/5 octagon tube. typical density. Balsa USA Gold 30 Minute Epoxy 9 oz set Our Price: $11. Alibaba. Phase Two is an epoxy resin system especially designed for building composite boat hulls with foam, balsa or honeycomb cores. ) End grain balsa sheets are often used where high physical properties are required in a composite sandwich core. resin has a long working pot life of at least 45 minutes As mentioned earlier, epoxy resins require accurate ratio mixes; this must be achieved for the resin to cure correctly. By sealing the surface of the balsa core, PC11 eliminates the need to pre-wet, or “prime” the core with resin prior to laminating, reducing resin use and labor costs. [ad name=”Adsense 125 x 125″] Ive removed wet balsa core from a carbon-balsa-carbon panel, and I intend to replace the balsa with a vacuum bagged foam core and a new carbon face. Master panels of flax/epoxy laminate and balsa-flax/epoxy sandwich composites were cut into square plaques (90 mm × 90 mm) for cone calorimeter Properties of Balsa Core Compressive Strength : 1870 psi Compressive Modulus: 590000 psi Tensile Strength: 1900 psi Density: 7-12 lb/ft3 Shear Strength: 432 psi Shear Modulus: 23100 psi Resin Epoxy resin that accounts for approximately 50% of the composition Lay Up Schedule 3 Layers Plain Weave Carbon Fiber End Grain Balsa Core Gaches Chimie proposes a wide range of composite materials from the best brands on the market. Another method of making boards is using epoxy resin and prolapse polystyrene foam, instead of polyester resin and polyurethane foam. This howto describes the formulas required to compute the density of balsa in both metric and imperial forms. Joiner Method ~ 3/4" CF tubes w/ phenolic sleeves. 40 kg/m2 pour 400g de tissu de verre Densité : 1. 5" x 16. I've been using it in this manner on guitar bodies and necks, which not only fills the pores, but hardens the wood's surface while leveling it, as well. E with sharp knife using the masking tape as reference. It is more flexible and can snap back into shape better than polyester, which is a little more brittle Spabond 345 EPOXY ADHESIVE SYSTEM ¬ High strength and toughness ¬ Excellent gap filling properties ¬ Designed for cartridge and mixing machine dispense ¬ Three hardener speeds give a range of working times / clamp times ¬ Low exotherm and shrinkage ¬ Germanischer Lloyd certified ¬ Lloyds Register certified INTRODUCTION Spabond 345 is a toughened, high performance adhesive system ideal Vinylester Balsa Core Adhesive (VEBCA) is a high performance vinylester based adhesive for bonding a wide range of fibreglass materials particularly for PVC foams and honeycomb cores. . I know there's cheater techniques to fill the weave during lamming to reduce pinholes during the hotcoat/2nd coat but has anyone experimented with selaing the balsa to reduce resin absorbtion during the lam/vacuum session? SIG Finishing Resin Kit Finishing Resin is a brush-on polyester surfacing resin designed exclusively for sealing balsa wood and creating a super smooth durable base for epoxy or enamel paint. Balsa can vary between 3# (foam weight) - 40# (oak weight) for pounds per cubic foot (lbs/cuft) but the most common densities are 8-16 pounds per cubic foot. Balsa Core 24" x 48" Grid Scored, Standard Density ( 9. 2% of the total market share. Fasco 103 LVX Epoxy Resin S SKU17918. Using an acid brush, thoroughly wet out the repair area, making sure the edges of the balsa core material are saturated with the mixture. Use it to encase or embed items to create jewelry, figurines, paperweights, coasters, drawer pulls and more. FINISH-CURE can be sanded the easiest of all our epoxies and is excellent for the sheeting of foam core wings. Great for sealing model boat hulls, inside and out. These epoxies allow for the Fiberglass resin is polyester resin. 2 Domaine d' Balsa for composites construction is flexible with a backing which allows itself to easily conform to curves. All screw holes and other surface imperfections should be made good with epoxy filler . Tie on feather legs and hackle. We can't say that for foam because the texture of foam is very coarse, and it does not suck resin up into the cells because foam cells are round, not tubular like balsa. A paper presented at the 1986 annual meeting of the Society of Plastics Industry titled Two Phase Epoxy Systems for Epoxy resin and fiberglass can be used to create a watertight seal over wood boat hulls. These holes then get filled with thickened epoxy and the proper sized hole is re-drilled through the center of the epoxy when the hardware is ready to be remounted. It is designed to cure in temperatures down to 40° F and above 90°F. - fuselage - composite made of epoxy resin, fiberglass, carbon and kevlar - wings - based on epoxy resin, wood veneer, balsa wood, expanded polystyrene, fiberglass, carbon and kevlar - tail - selected balsa wood, hinges in elevators need to be glued - accessories - all that you need to assemble your model: bolts, nuts, horns, plywood, etc. Designers, builders and owners have more choices available. When end-grain balsa-core is used in a resin infused hull each 1” cube is encapsulated with resin so water cannot migrate through the natural grain to rot the core further than 1” if someone put a screw or cut a hole in the boat that allowed water Epoxy's excellent adhesion to balsa and plastic foam cores, glass, aramid and carbon fabrics, allows the builder the advantage of selectively integrating these materials into the boat's structure. Quik-Cure Epoxy is an equal two-part adhesive that offers a high strength bond through a chemical reaction between the resin and hardener. Thickness 0. This is 1-square yard of 3/4 ounce weight Fiberglass Cloth from Hobbico. We have Canada's largest selection of composites products: resin, gelcoat, epoxy, silicone, urethane, coating, fiberglass, carbon fiber, abrasives, vacuum bagging supplies, and sundries! To shop online, please ensure you are registered as a customer. It is compatible with both polyester and epoxy resin systems. It will cure in temperatures down to 40˚F. weight) and is the material being used to seal the balsa adding as much weight as would be saved in epoxy? Hardware bonding involves drilling all the existing holes oversized. It also provides better bonding properties This beautifully crafted balsa wood gun features a stunning 5 piece redwood/balsa… (Read More) Trident Surfboards Poseidon 7’3 thruster serial #003 wood veneer, carbon fiber, abalone (early 2000’s) Sheet, 3/8in. 2 to part no. There are also various epoxy putties, etc. Designed for trowel or squeegee techniques. Balsa USA Gold Finishing Resin 9 oz set Our Price: $11. It has a very light consistency compared with Epoxy glue that most are familiar with. A rod-wrapping type epoxy works well. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. I cannot find any data that compared balsa core with a given thickness to foam core with the same thickness and carbon fiber skins in order to compare apples to apples. Pour enough resin to spread along the cloth in a thin, even layer. It has an extremely high strength and stiffness to weight ratio, and achieves an excellent bond with all types of resins and adhesives. Mix Z-POXY FINISHING RESIN in a clean plastic cup or on a non porous surface like flexible plastic. Balsa exhibits very high sheer strength properties and transfers stress from one skin to the other very well. Apply a second strip of resin 90 degrees to the first. On the remaining carbon where the balsa was particularly wet, there remains a brown residue of balsa. The core material is bonded to the skins with a high strength epoxy based adhesive. The panels are made of rigid balsa wood butt or structural and non-structural foam, and laminated with a high performance epoxy resin reinforced with a multi-axial film of glas http:// www. Made especially for use with polyester or epoxy resin. To those of you just joining us, we hope to gain your trust and support also. Phase Two Laminating Epoxy. The newly developed Balsaflex Lite core product features a novel coating system that is said to be capable of reducing the resin uptake in infusion processes by up to 50% for rigid panels and by up to 40% for flexible balsa wood sheets. I have been thinking about mounting it on a German Equatorial mount. only a 2-piece plywood transom. , Ltd. Resin penetration experiments were conducted using a proprietary epoxy resin. Finish and fair block and epoxy to the boat bottom. Thinning a thick epoxy with alcohol (or other solvent) can often reduce the quality of the bond. When considering the large amount of epoxy that Balsa absorbs during industry resin infusion processing practices, Paulownia has a larger "light-weight" advantage. [email protected] End-grain balsa-core with resin-infusion provides a stiffer, lighter, more durable hull: 1. vinyl ester resin vinyl ester fr & corrosion balsa; coremat; core-materials misc / other; pvc; urethane; equipment epoxy resins. Mix only enough epoxy as needed, Any excess epoxy cannot be saved after it has been mixed. Balsa Core Coating Options A sealant is available for balsa cores to minimize resin uptake and increase bonding strength PC11 Coating CoreLite’s classic proprietary epoxy-based coating system. Don't like e those instructions or the method at all. 13x5. This step helps the resin to flow. D‘apres ce que j‘ai compris des autres milieux que le nautisme (ex: automobile) c‘est que les bases epoxy ne sont pas stables en couleur et tenue aux UV, a l‘exception des peintures epoxy a base de poudres, plutot delicat a appliquer (pistolet electrostatique et passage au four) ca reste donc limite, dans le cas automobile, aux sous bassement ou equipements comme par exemple les jantes. The working time is 45-50 minutes so there is plenty of time to work the resin into the fiberglass. If a wet layup and vac bag is done then you run the risk of the balsa pulling resin out of the laminate and that makes a weak bond between the core and the laminate. "Bonsai-B" 420mm x 370mm x 480mm 16. Give them a call. Assurez-vous de couvrir entièrement le plan. The amount to mix will depend on the air temperature and pot life of the mixture. But core experts contend the problem is caused primarily by improper laminating technique and poor skin-to-core bond. With epoxy resin, the reinforcing material used in face-sheets was E-glass +45/−45 biaxial stitch bonded non-crimp fabrics with an areal density of 780 g/m 2. Spread the cloth from the center of the hull towards the edges. Allow 8 hours for full curing. Two different core materials were used in fabricating sandwich panels: PVC foam and balsa wood with densities of 62 kg/m 3 and 157 kg/m 3, respectively. Reseachers at Harvard University have developed a way to 3D-print a cellular composite with record lightness and stiffness using an epoxy resin. Epoxy is about double that. Finish sand the bottom surface with 220 grit and apply the first coat of Pacer Z-Poxy Finishing Resin PT-40. Doing this would be a good way to protect the balsa core from moisture damage. Use a thin coat, but try to cover the entire piece. 40/lb at this time. reinforcing fabrics are bonded together with polyester resin. Even Stringers ~ 1/4" sq balsa. and as for drilling a smaller hole than the size of bolt, what's that about! If your using 10mm bolt, drill 10mm hole, you don't need any stress on the epoxy plug, just compression with a decent backing pad underneath. com This video shows how to keep your board light. Résine Epoxy L + durcisseur CL (60min) R&G 930g. Sheets of balsa core. Balsa is the best universal core material in terms of its mechanical properties, weight, and cost. Core Materials Balsa. Suitable for hand layup of glass, carbon, aramid and polyester fibers. I define a dry roller one that when soaked with epoxy and rolled to a piece of blue paper towel it will not soak through (towel becomes dark blue color instantly) you see very thin layer of epoxy on it. Application on foam wings: Sheeting foam wings with Fliteskin TM is so simple and the results are so great that after the first use, you'll never go back to the long and messy process of sheeting with balsa, fiberglass and resin. Use to seal all engine and fuel tank areas. Le mélange se transforme en solide rigide de haute résistance et catalyse en 10 minutes. Our standard epoxy glassing kits contain resin which is classified hazardous and cannot be sent by air freight. Hardeners SD 4771, SD 4773 and SD 4775 are certified for shipbuilding by DNV-GL control office. Resine époxy Z-POXY fabriqué par ZAP, séchage en 5 minutes (237ml). This convenient kit includes enough resin to do an average . Hull Construction – Twaron, Kevlar, Chopped Mat, Roving, Vinylester, Epoxy Resin, Airex, Balsa Posted on January 28, 2010 November 28, 2010 by Richard Jordan Fiberglass is made of fibers composed into fabrics then layered with resins. This helps hold it in place while adding more resin. Phase Two is an ultrahigh modulus laminating epoxy resin system ideally suited for composite cored (foam, honeycomb and end grain balsa) boat hulls. 24,30 € Concept Résine est une entreprise située dans la commune de Bailly-Romainvilliers dans le département de la Seine-et-Marne (77). 52 . Seal with epoxy resin it once you have cut and shaped it completel . The epoxy coated poppers will need to dry on a slow rotating drum for a smooth finish. Epoxy Resin System Three Resins System Three Epoxy Clear Coat Epoxy Balsa core Divinycell H80 Plain H100 Plain Divilette Last a Foam 4 lb. 5oz per square foot / 5kg per square meter. This sheet foam is a rigid, closed cell material with excellent thermal insulation and flotation properties. 4 out of 5 stars 2,806 2) Dope is much less messy than resin, especially when you don't take care and plan ahead in resin application. Publié le 9 févr. 5in. The ones on the right are scored with kerfs. Dur-A-Flex, Inc. You also NEED to wet the balsa ( or any other core for that matter ) with GP resin before you bed it into the ATC putty. > ramollir de la resine epoxy *deja durcie*? > Ben faut trouver le solvant qui compose la résine (et qui s'évapore quand ça sèche) ! C'est sûrement le genre de truc super chiant à enlever (genre la mousse polyuréthane, une fois séchée sur les doigts !). com propose des marine époxy résine de haute qualité et abordables. I had a visit yesterday from a salesman with Revchem Composites - Jarret Clarke - out of Tacoma, WA . This 'Finishing Epoxy' has a thinner viscosity, and a longer working time than most 2-part epoxies. A cored laminate will weigh a little less than 5lb, which is nice but it will set us back $6. ambient conditions. The other type of resin, polysester resin, will not bond to wood as well as epoxy. The two segments were bonded back together with the L&L Epoxy Resin to ensure that the CPES would move only through the sawdust area of the balsa block. 52 . On epoxy orders outside the lower 48 states we will substitute System 3 resin epoxy. As I posted; you can create a lighter structure with epoxy. When added to polyester, vinyl ester or epoxy resins these materials can minimize resin drainage from vertical surfaces, increase bonding properties, reduce the cost of the resin mix, improve abrasion resistance or improve sanding properties, reduce or increase the mixed weight and lower shrinkage rates. I block sanded the balsa a few times to make sure it was perfectly flat. Peut être que cela est évident pour certain, mais moi je ne sais pas c'est du Polyester qui a été mis en oeuvre ou de l'Epoxy. . 1-772-464-0808. Balsa also has the highest shear strength of any core material, meaning it most strongly resists being separated from its skins. The goal is to save weight by using less epoxy. According to Germany's Fraunhofer Institute for Wood Research, turbine blades consist chiefly of glass-fiber-reinforced plastic and balsa wood, which are bonded together with epoxy or polyester resin. The same core material (balsa wood) and root inserts were used as in the epoxy blade. Low resin absorption characteristics of Gurit® Corecell™ and unique knife cut formats allow for higher performing infusions, lower resin cost & lower weight than any other structural core. Acheter maintenant Résine Epoxy Dupli Color 500 g et d'autres produits de la catégorie Extérieur directement en ligne chez Brico+Loisirs ou dans l'un de nos quelque 80 magasins. Balsa-core flax/epoxy sandwich composites were prepared by uniformly applying the resin/hardener formulation onto balsa surfaces before hand-laying impregnated flax fabrics. As for thin versus thick epoxy, my experience is that thick epoxy is superior. Pot-life and cure-time will vary when the epoxy is thinned. Coated with a thin resin film to enhance bond with epoxy, VE and polyester resin systems. Now, through controlled growing and careful selection, Balsa is competitive in weight, as well as offering superior performance in stiffness and strength, particularly where local crushing or bruising is a concern. The balsa core layup skin will have much less punchure resistance than a solid layup with mat in between. Epoxy resin homologated to build and protect fiberglass water tanks, wood, cement and metal (in this case previous application of Nautilus Epoxy Primer). Z-Poxy Finishing Resin is a premium light weight two part epoxy laminating/finishing type resin. Epoxy resin, usually as a two part mix system, cures under a wider range of temperatures and moisture content than other glues, does not require pressure while curing, and has good gap-filling properties: near-perfect joints with very small gaps actually produce weaker bonds. It’s a little stronger than and also more flexible, allowing it to snap back into shape better than Polyester which is a little more brittle and can lead to cracking. ft. Usually a 15-25mm balsa core is sandwiched between GRP skins, each 1-2mm thick. Self-leveling properties are ideal for coating and laminating. The epoxy resin was enhanced by nanoclays with special treatment to improve their dispersion and interface adhesion. Repeat once more with a clean sheet of paper towel. 40 - . epoxy for use in model making. I was then thinking of sealing that in with epoxy resin since poly eats the foam (does anyone know if it eats the blue dow foam?). i just trying applying epoxy resin with terrorable results, so much runs pictures are in my gallery, i don't know how to attach it to this thread. Cut the size block you need, over drill a hole, fill with structural epoxy (fillet or jb weld, etc), drill pilot hole, tap threads in structural epoxy. In recent years, surfboards made out of balsa and a polystyrene core are becoming more popular. Build Photos. End grain balsa can absorb or release air during resin infusion. Fiberglass, Carbon, & Kevlar. This significantly changes the requirements of the epoxy resin used in the laminates. net 42 Players Crescent Totton Southampton Hampshire UK. 5 oz mat. 5mm. better than epoxy unless you post cure it. Epoxy will adhere better than any other resin to a wide range of materials, which makes it ideal for attaching cores, stringers, or other items. The rate at which this occurs may be critical in composite manufacturing, especially if the timescale is longer than that of the commercial process. Mix equal parts of PartA, PartB, and denatured Alcohol. Provides the highest UV resistance count of all the Sicomin clear resins. Reduces resin absorbed by core in VARTM (infusion) by up to 90% in rigid sheets and 50% in contourable (CK) core. The resin shows no shrinkage, contains no harmful solvents, and is intended to remain with the fiber and balsa beyond the end of a yacht’s life, allowing all three materials to be reused. This marks the first time that epoxy is used for 3D Selon Brian Knight, auteur de l'article «Dilution West System Epoxy," diluant pour vernis est le meilleur additif à utiliser pour obtenir un bon résultat d'époxy amincie. Resin infusion is a great process by which to accomplish this. I like to add an amount equal to 1 part so you end up with 1/3 to 1/3 to 1/3. This serves to strengthen the deck and it also alters the flex characteristics of the board in a positive way. Publié le 9 févr. Mix well. A family run business to this day, three generations have strived to provide a wide variety of products and expertise to allow you to make an informed choice on your purchase. End grain balsa is sold for this purpose and is advertised as being suitable for resin infusion. so i was thinking of going carbon fiber on the floor of my flat but the material alone is very expensive on top of the epoxy resin and everything else. Balsa End grain or sometimes called balsa endgrain is very strong when sandwiched between fiberglass and epoxy. 5" x 14. Use for fibre-glassing the center section of a wing or the entire airplane. "Hawaiian Pineapple Resort" 420mm x 420mm x 700mm 16. Adding additional hardener to an epoxy will not speed up the reaction and you will end up with a soft sticky gooey mess as there will not be enough resin to bond with the hardener. 29 Seal Balsa before applying epoxy ? The purpose is to prevent the adhesive from soaking into the wood. Résine en phase aqueuse . The epoxy blade contained a lightning protection system while the thermoplastic blade did not; this was assumed to have no effect on structural performance. Découvrez la table River en résine epoxy et son design si original qui allie modernité et authenticité. Choice of variety hardeners to adjust reactivity with your lead time. /Courtesy of Alcan Baltek Balsa can be processed with all known resin systems and processes and has excellent laminate adhesion properties. But tucked inside the blades of these feats of modern engineering is a decidedly low-tech core material: balsa wood. Some epoxies, like fairing epoxies, are a little more tolerant of the mix ratio. It will cure in about 3 hours with a full cure in 24 hours. Epoxy is much more expensive than polyester or even vinylester. showing 1 - 1 of 1 Resin: Proset 114LV/210 Epoxy; Core: 1/2″ 9. Density Spares are often 100% carbon fiber/epoxy because this material can resist the elements and provide the stiffness needed to keep the blades in place. All the laminator does is press it right into a layer of wet resin, and if there's enough resin there, it isn't ever going to come unstuck. fibres/E-glass balsa CK 57. They are made largely of glass-fiber-reinforced plastic (GFRP) and balsa wood bonded with epoxy or polyester resin,” says Peter Meinlschmidt, project manager at the Fraunhofer Institute for Wood Research, Wilhelm-Klauditz-Institut, WKI in Braunschweig. PVC foam core, Nomex Honeycomb Core, Kevlar Honeycomb Core, Aluminum Honeycomb core and balsa wood etc. In other places, the balsa popped right off, a Epoxy Resin. The second material was E-glass/epoxy (GE While I mixed eight pumps of resin and hardener at a time, Dave used a chip brush to apply neat (unthickened) epoxy to the plywood and the underside of the outside fiberglass laminate. It is heat resistant as well, much more so than any resin it is apt to be paired with in a fiberglass laminate. Figure 1-2 A typical cored laminate consists of end-grained balsa or other core material sandwiched between two resin/fiber skins. 3 using epoxy resin: 4 7 11 13 14 15: Balsa wood or cardboard: Cut and fabricate to specified dimensions and detail: Paint black prior to cementing to the main body: 5: Brass rod: Shape to specified dimensions: Polish: 6: Wood: Turn on lathe to specified dimensions. The increased bond strength comes with substantial resin and labor savings. Extruded Polystyrene (XPS) Boards XPS is produced using the same base materials (polystyrene) as EPS. Good marine-grade sealants applied to the hardware will add another layer of protection. Typically, epoxy boards are made from EPS foam and are coated in epoxy resin. It can then be decorated with any paint just like balsa wood. Duratec. By applying a thin coat t BALTEK® SB is a core material produced from select kiln-dried balsa wood in the ‘end-grain’ configuration. Once the first 3/16" layer of core was laid in place over the notched epoxy, I covered the top with more thickened epoxy--again using the notched trowel--and laid on BALTEK® SealXis an innovative balsa coating that reduces the resin-uptake and generates the lowest total cost of ownership and highest performance. Epoxy is the most expensive, but is three times the strength of the others. Introducing Amazing Deep Pour epoxy - turn it, cast it, use it to coat. Epoxy Resin and Hardener Kit All-purpose epoxy adhesive for patching and bonding miscellaneous materials as well as laminating and or making putties. Automotive Manufacturing Mainstream automobiles are still researching ways to incorporate carbon fiber into new car designs, but high-end cars and racecars have been using this material for some time. But unless I missed something, I think the question was about possible delamination using polyester on balsa. epoxy is an excellent, low odor substitute for polyester resins. Upon the first introduction of alcohol, the resin will become cloudy. Reductions up to 45-50% of epoxy by weight can be achieved by using triple coated AL600/10 Baltek end grain balsa compared to non-seal. com 01. A great example of a fuselage DuFLEX® panels are 2400 mm x 1200 mm with multi-axial glass fibre or carbon fibre skins (on request), laminated with a high performance epoxy resin. But the reason for mat is nothing to do with cores to make stiff lightweight panels. They are made largely of glass-fiber-reinforced plastic (GFRP) and balsa wood bonded with epoxy or polyester resin," says Peter Meinlschmidt, project In some instances, outgassing has been blamed for delaminations and blistering in marine construction, especially in parts made at elevated cure temperatures with epoxy resin systems or finished in dark colors. Cette résine époxy bicomposant est particulièrement adaptée aux utilisations en modélisme. 5" x 27. For best results, FINISH-CURE™ should be heated to a temperature above 85 degrees F or applying light weight fiberglass, lay cloth on balsa first, then brush on FINISH-CURE™. , Ltd. Once resin has set, trim the L. 88. Im planning 54 so I can set the secondary Experience achieved in many years of laying on concret, epoxy floors and seamless flooring, with highly skilled operators selection and unique techniques developed in research for the best resin components, are the main traits that Colledani gathered in different application areas. Drape the cloth over the part and apply a thin strip of resin down the center. Epoxy resin is the only resin that can be used on EPS foam. The balsa provides shear resistance and the FRP the flexural resistance, resulting in extremely high strength-to-weight and strength-to-depth ratios. Balsa is always a bit of a risky material as it soaks resin so easily. Slowly pour the resin along the cloth, so as to adhere the cloth to the wood. Epoxy Developed for Boat Building & Boat Repair. Mix a small amount of epoxy/ hardener. An epoxy coating will protect the finish. This method of making holes through your balsa wood-cored structure will provide a wall of epoxy resin around the hole and keep the balsa wood back away from any water that may pass through the hole. 7 out of 5 stars 146 $53. However, epoxy does have some drawbacks, when compared to polyester/vinylester resins. System 3 resin is comparable to Resin Research resin in clarity and strength but does not have the same UV inhibiting Suppliers to the composite Industry Duroplastic is a well established South African company that was founded in 1986 to supply composite materials to trade and industry. Fiberglass sandwich kevlar hybr. 5" steel/ resin clay/ resin/ plaster/ plastic/ balsa veneer sheet/ epoxy putty/ FRP/ styrene foam/ LED lighting Private Collection since 2011 All images copyright TOKYO GOOD IDEA Development Institute Co. balsa wood core will be studied. It is applied to the surface of the balsa core to seal the pores in order to minimize resin uptake. 3/4 oz cloth with thinned epoxy works very well. Porte clés personnalisé en resine epoxy. VEBCA has excellent mechanical and physical properties. Optical photograph of a translucent hexagonal honeycomb printed using the baseline epoxy ink with ~1 vol. China is the major producer and consumer globally, consuming almost 35% of the global resin production. Mixing ratio 2:1 in weight (100 gr A + 50 gr B). Sheeting ~ 3/32" balsa w/ glass & epoxy resin. Plywood is the better chose but it needs to be 5 ply not 3 ply . View full product details Bert, we all know that epoxy is way stronger than polyester. Use for fiber-glassing the center section of a wing or the entire airplane. Peut être aussi que le Kevlar ne peut être mis en oeuvre qu'avec de la résine Epoxy. The second type is used for laminating and tends to be thin in consistency. Its good stuff. It resists water intrusion better than the other resins, resists blisters, emits no VOCs, and shrinks less. Great for sealing model boat hulls, inside and out. Résine Epoxy BK Yachtcare Durcisseur inclus Couleur : jaunâtre Au contact de l'eau cette résine devient blanche Contenance : 250 gr Consommation : 0. On the middle shelf are epoxy enamels (HobbyPoxy, K & B SuperPoxy and Klass Kote Epoxy). Epoxy is an equal two-part hobby adhesive that forms high strength bonds through a chemical reaction between the resin and hardener. Balsa is a cost effective, natural material that is produced in a variety of densities that can be tailored to specific applications. from a balsa core and coated with carbon fibe r coated be i ng va ried the resin used during the manufacturing process. Balsa-Foam has no memory or rebound, it will hold an impression. Resin Modifiers and Fillers are used to change the properties of resins. Suitable for fabrics lamination and wood bonding. Whether it’s balsa, plywood or some of the foam cores all can eventually absorb water from a leaking deck penetration. Can be used in conjunction with other foam core materials Specifications The Epoxy Supplies Most all boats have some sort of “core” in the decks. There are many photos of boards using this technique throughout this site, check it out! En choisissant une résine époxy pour recouvrir votre peinture, photo, projet sur bois, impression ou autre type d'artisanat, vous pourriez être tenté d'opter pour ce qui est le plus économique. However, its naturally high resin-uptake is a weakness for manufacturing. balsa resine epoxy


Balsa resine epoxy