Low-cost recycled PET bottle flake-based hollow glass bead curtain and preparation method thereof

Abstract

The invention discloses a low-cost recycled PET bottle flake-based hollow glass bead curtain. The low-cost recycled PET bottle flake-based hollow glass bead curtain is characterized by being obtainedthrough the steps of firstly, carrying out chain extension and tackifying on a recycled PET bottle flake through pyromellitic dianhydride to obtain PET master batches, mixing the PET master batches with an assistant and preparing a PET film by adopting a film casting technology; secondly, cleaning and deoiling hollow glass beads and carrying out surface roughening and coupling treatment to obtainthe glass beads subjected to surface coupling treatment; thirdly, depositing titanium dioxide and lanthanum oxide on the surfaces of the hollow glass beads by adopting a hydrothermal method to obtainmodified hollow glass beads; and finally uniformly spreading the modified hollow glass beads on the surface of the PET film subjected to bidirectional thermal stretching and cooling. The low-cost recycled PET bottle flake-based hollow glass bead curtain is simple in production technology and low in cost; and the glass beads are good in bonding fastness, thereby ensuring that the glass bead curtainhas a good stable projection effect.

Description

technical field [0001] The invention belongs to the field of projection screens, and in particular relates to a low-cost recycled PET bottle sheet-based hollow glass bead screen and a preparation method thereof. Background technique [0002] At present, most projection screens used for film or video image projection are formed by superimposing a black base plate and a white polyvinyl chloride (PVC) thin layer. Traditional projection screens have low reflectivity (gain) parameters, resulting in dark projection images that need to be seen clearly in a dark space; and traditional projection screens have poor scattering capabilities, and projection images can only be seen in a dark space. Can only be seen from a small viewing angle. [0003] In order to improve the reflection ability and scattering ability of the projection screen, people have proposed a glass bead curtain with glass beads glued on the PVC film. However, the common defect of this kind of glass bead curtain is ...

AI Technical Summary

Problems solved by technology

However, the common defect of this kind of glass bead curtain is that it is afraid of moisture, and the beads will fall off if it is used improperly.

Because of its uneven surface, it is easy to be dirty, so when cleaning the pollutants on the surface of the glass bead curtain, the glass beads on the surface are more likely to be scraped off