Composite film for touch screen and production method of composite film

Abstract

The invention relates to a composite film for a touch screen and a production method of the composite film. The composite film comprises a hard coating, a composite base material, an SiOx layer, an SiO2 layer and an ITO layer, wherein the x ranges between 1.0 and 1.9, a transition layer of the SiOx layer is added between a polyethylene terephthalate (PET) base material and the SiO2 layer, a certain Si-dangling bond exists in the SiOx layer, the Si-dangling bond and a C-H bond or C-OH bond, which exists on the surface of the composiste material are combined to form a C-Si or a C-O-Si covalent bond, adhesive force of the SiO2 layer and the ITO layer on the composite material is enhanced, the degassing requirement for the composite base material is reduced greatly, the degassing processing time is shortened, the production efficiency is improved, and the SiOx layer and the SiO2 layer have covering functions for the base material, so that water in the composite material is prevented from affecting ITO coating films, and the stability of ITO resistance is guaranteed.

Description

technical field [0001] The invention relates to the field of touch screens, in particular to a composite film for touch screens and a manufacturing method thereof. Background technique [0002] Indium Tin Oxide (ITO) transparent conductive film is an n-type degenerate semiconductor. Due to its high electrical conductivity, high visible light transmittance, high mechanical hardness and chemical stability, the more It has attracted more and more attention and has been applied in many fields. At present, composite films for touch screens are mainly used in two aspects. On the one hand, they are used in flexible display devices, such as flexible touch screens and organic electroluminescent displays. On the other hand, it is used as a substrate for solar panels and solar control films (car film, architectural glass film, etc.). [0003] The structure of the traditional composite film for resistive touch screen is generally HC (hard coating, hard coating) / PET (Polyethylene terep...

AI Technical Summary

Problems solved by technology

However, traditional SiO 2 The adhesion of ITO and ITO films on the composite substrate is poor, so the composite substrate needs to be fully degassed during the manufacture of the composite film

In addition, the traditional composite film production process for resistive touch screens has very strict requirements on the degassing of the composite substrate. It takes 28 hours for the pretreatment time. After being transferred to the main equipment, it needs to be degassed again before coating, and the production efficiency is very low.

Images