PREPREGS Russian patent published in 2018 - IPC B29B11/16 C08J5/24 

FIELD: laminated products or materials.

SUBSTANCE: invention relates to combined materials made from prepreg for the manufacture of structural parts and components made of composite materials, which are used primarily as parts in the aircraft industry, for wind wheels, for sporting goods, ships, trains and other vehicles. Combined material consists of I) a prepreg, that is a solid mixture of reactive synthetic resin and reinforcing filler in textile or fibrous form, as well as optionally conventional additives, and II) the separable separation film with a multilayer structure, formed a) directly adhered to the prepreg tape by an antiadhesive layer, made of at least one thermoplastic homo- or copolymer α,β-unsaturated olefins and at least one wax-like compound as an anti-adherent additive, b) optionally an adhesion promoter layer, c) a layer made of at least one thermoplastic homo- or copolyamide, d) optionally an adhesion promoter layer, e) an antiadhesive layer, which is made of at least one thermoplastic homo- or copolymer α,β-unsaturated olefins and has an antiadhesive coating based on a cured polysiloxane, or alternatively, the layer e) by a partial layered structure of e') of a layer made of at least one thermoplastic homo- or copolymer α,β-unsaturated olefins, f) a laminated adhesive layer and g) a biaxially oriented release layer, which is made of at least one thermoplastic polyester and a waxy compound as an anti-adhesion additive, or alternatively to the layer g) of the partial layered structure g'), preferably a biaxially oriented release layer, which is made of at least one thermoplastic polyester and has a release coating based on the cured polysiloxane.

EFFECT: invention provides for the avoidance of damage to parts due to the difficult or insufficiently complete removal of the separable release film.

14 cl