A breathable release protective film for composite material molding

Abstract

The invention relates to the technical field of consumables for composite material moulding, and particularly relates to a protection film with breathing and releasing effects, wherein compared with the prior art, the breathing-releasing protection film for composite material moulding is composed of two layers of materials, one layer is a thin film with a releasing function, the other layer is a penetrant material with a resin-absorbing function, and the thin film with a releasing function is integrally bonded with the penetrant material with a resin-absorbing function by adopting an adhesive. The protection film adopting the structure and the materials has multiple effects of breathing and isolating, single-surface releasing and single-surface sticking, resin-absorbing, etc; and the protection film is placed on the surface of a composite material product and attached to the lower surface of an upper mould in the case of being used, and via the operation, the surface evenness and the smooth finish of the composite material product can be improved, the time of the subsequent work can be reduced, and the cost can be effectively decreased by 10-20%.

Description

technical field [0001] The invention relates to the technical field of composite material molding, in particular to a gas-permeable release protective film for composite material molding with a gas-permeable release effect. Background technique [0002] There are many classifications of composite material technology, and compression molding is one of the most used types. Products such as hollow pipe fittings, SMC / BMC, and foam filling all use molding technology. Forming agent to ensure the smooth demoulding of the product. Due to the uneven quality of raw materials and complicated process control, there are a certain proportion of defects on the surface of composite products (rough embryos), such as insufficient cleanliness, etc., which will have a certain impact on follow-up work. , which virtually increases the difficulty of grinding and repairing, and further increases the cost. Therefore, how to improve the appearance quality of composite products (rough blanks) has beco...

AI Technical Summary

Problems solved by technology

[0002] There are many classifications of composite material technology, and compression molding is one of the most used types. Products such as hollow pipe fittings, SMC / BMC, and foam filling all use molding technology. Forming agent to ensure the smooth demoulding of the product. Due to the uneven quality of raw materials and complicated process control, there are a certain proportion of defects on the surface of composite products (rough embryos), such as insufficient cleanliness, etc., which will have a certain impact on follow-up work. , virtually increases the difficulty of grinding and repairing, and the cost rises further. Therefore, how to improve the appearance quality of composite products (rough blanks) has become a focus of industry research