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All Categories > Composites & Finishing Materials > Fiberglass, Kevlar & Carbonfiber > Item # SU300  
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Item # SU300, Unifiber Reinforcement Tape

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Uni-Web S-Glass is a new and easy to apply fiberglass reinforcement. It consists of a non-woven sheet of unidirectional S-glass fiberglass fibers that are held in position by a fine spider web of polymer fibrils that rest on the surface. The fibril or web system allows the fabric to be cut easily, trimmed or slit, giving clean edges with absolutely no fraying. The fibers lie flat and straight, and cannot shift or bunch up, as often happens with uni-stitched fabrics.

S-glass fiber is superior in strength to standard E-glass, making the Uni-Web S-Glass perfect for high strength, weight critical applications where exact placement of the fiber is needed. It is compatible with polyester, vinyl-ester and epoxy resins and is suitable for use in wet layup, vacuum bagging and resin infusion manufacturing.

Specifications  · Fiberglass Information



Reinforcement Tape

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Fiberglass Information

The most basic structural material in buildinga composite aircraft is glass cloth. The use ofglass in aircraft structures, particularly structuralsandwich composites, is a recent development.Fiberglass cloths are available indifferent formulations. "E" glass (electrical isthe most common all purpose glass), while"S" (high strength) glass is made for specialapplications. Glass cloth is available commerciallyin hundreds of different weights,weaves, strengths and working properties.Very few of these; however, are compatiblewith aircraft requirements for high strengthand light weight. Even fewer are suitable forthe hand-layup techniques developed byBurt Rutan for the homebuilder. The glasscloth featured here has been specificallyselected for the optimum combination ofworkability, strength and weight Two types ofglass cloth, a bidirectional cloth and a unidirectionalcloth are used. Bid cloth has half ofthe fibers woven parallel to the selvage edgeof the cloth and the other half at right anglesto the selvage, giving the cloth the samestrength in both directions. Uni cloth has 95%of the glass fibers woven parallel to the selvage,giving exceptional strength in that directionand very little at right angles to it. Bidis generally used for pieces which are cut ata 45° angle to the selvage, a bias cut, whichenables the builder to lay Bid into contourswith very little effort and provides the neededshear and torsion stiffness for flying surfaces.Uni is used in areas where the primaryloads are in one direction, such as wing skinsand spar caps. Multiple layers of glass clothare laminated together to form the aircraftstructure. Each layer of cloth is called a "ply".Glass cloth should be stored, marked and cutin a clean area with clean hands and cleantools. Glass contaminated with dirt, grease orepoxy should not be used. The area used forstoring and cutting glass cloth should beseparated from the aircraft assembly areabecause it will be exposed to foam dust,epoxy and other elements which can contaminatedthe cloth. A pair of good qualitysharp scissors, felt-tipped marker, a straightboard and a tape measure are needed formarking and cutting. The small amount of inkfrom marking and numbering plies has nodetrimental effect on the glass cloth. Standardfiberglass cloth is exactly what thename says - glass. Fine fibers are spun frommolten glass marbles, gathered into yarn andwoven into a strong, supple glass fabric. Itcan be folded, rolled or draped, like any otherloosely woven fabric - but it can be chemicallytransformed into solid sheets of tremendousstrength. All the fiberglass fabrics listedbelow are volan treated for maximumstrength and resistance to moisture andabrasion. They feature a weave that is tightenough for high strength, yet open enoughfor thorough wetting by resins. Fiberglasstapes have non-raveling selvage for glassingseams, corners, edges and repair jobs. Rovingglass is a substitute for uni cloth forcontours over spar caps, wings and elevators.It is made of roving glass held togetherwith cross threads to avoid roving cross over.

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