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About ACP
In unidirectional fabrics the fibers are oriented in one direction and are held together across the fibers by a variety of methods, including fill fibers stitched across the fibers, sizing and a spider web adhesive. ACP's unidirectional products include the following:
Approx. 6,000 filaments of carbon fiber are bundled together to make a 1/8" (UP-01) wide flat ribbon. 12,000 filaments make up the 3/16" (UP-02)wide ribbon. The ribbon, also referred to as tow, is loosely bonded together with an epoxy sizing to hold the fibers for handling and gluing purposes. It can be bonded to the top and bottom of wing spars with CA adhesive for spar caps and can also be used to reinforce dihedral and plug-in wing sections.
Kevlar® ribbon is a loose bundle of Kevlar® fibers approx. 1/8" wide. It can be used to wrap wing spar joiner boxes in gliders, and to stiffen in fuselage structures. It can be bonded to the structure with thick CA adhesive.
The lighest uni-graphite available. The unidirectional fibers are held in place by a flat thin thermoplastic strip that has been heat set every 4" along the length of the material. This process produces a very flat, thin (.0045" Thick) unidirectional product. Being so thin it will not produce a ridge when used under 1/32" balsa or obechi wing sheeting. Only available 12" wide, but can be easily cut into strips if needed.
A 12" wide unidirectional 1K carbon fiber produced by weaving a fine thermoplastic fiber across the carbon fiber and then heat setting the material in place. The 1 K fiber yields a .006" thick material that is very smooth. Bonded under .73 Oz. fiberglass cloth, the Thermo Uni-Graphite will produce a light hand launch or slope soaring wing.
UniWeb is a new and easy to apply type of reinforcement. It consists of a nonwoven sheet of unidirectional fibers, either carbon or S Glass, that are held in position by a fine spider web of polymer fibrils Iying on one or both surfaces. The special polymer used is compatible with epoxy and polyester resins. The fibril or web system that bonds the reinforcement fibers together 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. Carbon Fiber UniWeb weighs 3.5 Oz. / Sq. Yd. and is .006" thick. It is available in 1", 2" and 12" widths. The S Glass Uni-Web is .008" thick and weighs 4.0 Oz./Sq. Yd. and is available 12" wide. Either UniWeb product can be used to reinforce foam wings and can easily be wetted out with EZ-LAM epoxy resin. When reinforcing a foam wing, lay up the UniWeb nunning spanwise and from leading to trailing edge& then a layer of .73 Oz. or 1.4 Oz. glass can be applied over the UniWeb at a bias to the wing span, i.e. 45 degrees. The laminate can be cured in a vacuum bag or inserted back in the wing cradle with pressure applied by weights.
Unidirectional 6K fiber is held in place by a stitched glass yam. When bonded under 1.4 Oz. fiberglass it will produce a suitable open class glider wing. As with all our unidirectional materials, it is easy to handle, cut and wet out with EZ-LAM epoxy resin. Available 12" and 38" wide.