Cope-spun yarn is introduced by glass multifilament of heart yarn, manifold glass staple fiber of hull, successivelyconstitute. This products both glass multifilament high strength and manifold glass staple fiber's length extend, also can moderate adjust combustible matter content, It's a good structure material. It's abroad used friction material, sealing material, brake materials, heat insulation and preservation material and filter material etc. It is the main framework material used without asbestos clutch, Brake Pad's etc.