Reel-to-reel hot rolling forming device for fine structures of polymer thin film products

Abstract

The invention relates to a reel-to-reel hot rolling forming device for fine structures of polymer thin film products. The device is characterized by comprising a frame, an unwinding module, a preheating module, a forming / shape-preserving module, a tensioning force adjusting module and a winding module, wherein the frame is mechanically connected with the preheating module, the forming / shape-preserving module and the tensioning force adjusting module; the tensioning force adjusting module is connected with the forming / shape-preserving module; being unwound by the unwinding module, a to-be-processed thin film substrate is heated by the preheating module, then enters into the forming / shape-preserving module for hot pressing and cooling formation, is imprinted, and is finally wound around the winding module. Compared with the prior art, the reel-to-reel hot rolling forming device has the advantages that the joint degree between the substrate and a mould during shape preserving and cooling processes is enhanced; the microstructure resilience on the surface of a thin film is reduced; the forming precision is improved; and suitability for mass production of large-area thin film devices is achieved.

Description

technical field [0001] The invention relates to a device in the technical field of polymer processing, in particular to a roll-to-roll hot roll forming device for polymer film products with fine structures. Background technique [0002] With the development of new energy and energy-saving technology, new media and information technology, polymer film products with surface fine structure are more and more widely used. Optical films have become one of the major markets for polymer films with microstructures, including brightness enhancement films, uniform light films, reflective films, laser films, diffusion films, and light concentrating films. Among them, the surface of the brightness enhancement film is generally a microprism structure with a height of about 20 μm, which gathers the diffused light, improves the brightness of the front view, and the light utilization rate reaches more than 90%. Another example is a reflective film that can produce a strong reflective effect...

AI Technical Summary

Problems solved by technology

However, when the film material is heated above the plastic deformation temperature, the tensile force it can withstand is greatly reduced, and the film cannot fully contact the plate roller during the imprinting process, which reduces the precision of microstructure forming

Searching foreign patents found that US Patent No. US2011 / 0236631A1 (named Glass texturing using a porous textured roll under vacuum) combines film calendering with roll-to-roll roll forming to improve processing efficiency and reduce energy consumption, but the line contact The unique rolling method leads to low forming accuracy and difficult demoulding

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