Method for improving bonding soundness of glass beads on glass bead screen

Abstract

The invention discloses a method for improving the bonding soundness of glass beads on a glass bead screen. Particularly, the upper surface of a screen blank is uniformly coated with a white emulsion layer, and a layer of glass beads is uniformly sifted on the white emulsion layer after the white emulsion layer evaporates naturally and is dried for 50% to 80%; after the glass beads are sifted, the glass beads are dried for 35 seconds to 120 seconds at a temperature ranging from 90 DEG C to 115 DEG C, and the glass bead screen bonded with the glass beads is obtained; and a screen bottom, a screen base and a screen surface are paved on the screen blank from bottom to top successively. According to the method for improving the bonding soundness of glass beads on the glass bead screen, the thickness of the white emulsion layer and the size and the sifting density of the glass beads are strictly controlled, and white emulsion modified by polyvinyl acetal is selected to overcome the defect that the bonding strength of traditional white emulsion is decreased because of moisture; and in addition, a glass bead anti-falling layer is added on the surface of the glass bead screen to reinforce the glass beads. The method can effectively improve the bonding soundness of glass beads on the glass bead screen, and accordingly, the glass bead screen is guaranteed to have a good stable projection effect.

Description

technical field [0001] The invention relates to a glass bead curtain, in particular to a method for improving the bonding firmness of the glass bead on the glass bead curtain. 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 that it is afraid of moisture, and t...

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

Or, when this kind of glass bead curtain is used as a hand-drawn curtain, as the glass bead curtain is rolled up or down repeatedly, the glass beads are also easy to fall

Although people have successively proposed a metal screen in which metal powder is mixed in PVC, the cost is high and the viewing angle is small.

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