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|1. (WO2018103012) MICROSTRUCTURE TRANSFER FILM MANUFACTURING METHOD AND MICROSTRUCTURE TRANSFER FILM|
|Title:||MICROSTRUCTURE TRANSFER FILM MANUFACTURING METHOD AND MICROSTRUCTURE TRANSFER FILM|
A microstructure transfer film manufacturing film and a microstructure transfer film, the main steps comprising: Step a. - co-extruding two non-compatible types of thermoplastic polymer raw material, extruded and formed into a two-layer extrudate by a T-geometry die, one side forming a base material layer and the other side having attached a transfer layer; Step b. - by means of a back pressure wheel and a plate wheel having a surface provided with a microstructure, pressing the two-layer extrudate into a film, and forming a microstructure surface on the transfer layer, and; Step c. - forming by evaporation a metal reflecting layer on the microstructure surface, so as to create a microstructure transfer film. In this manner, forming a microstructure transfer film is simpler and faster, can greatly lower costs and reduce and save space, and a base material layer remains flat after removal, permitting recycling and reuse.