| abstract |
The invention relates to a three-layer co-pressing composite membrane special for invisible correction, a preparation method and application thereof, which solve the technical problems of poor transparency, low tensile strength, poor toughness and elasticity, large stress relaxation rate and unsatisfactory treatment effect of the manufactured invisible correction device of the existing membrane, and comprises an outer layer A which is a transparent thermoplastic polyurethane layer or a polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester layer; the middle layer B is a polyethylene terephthalate layer or a polyvinyl chloride layer; and the outer layer C is a polypropylene layer or a polycarbonate layer. The invention also discloses a preparation method and application thereof. The invention can be used in the field of preparation of tooth socket materials. |