Liquid crystal backlight light guide plate self-adhesive protective film and production method thereof

A technology of self-adhesive protective film and production method, applied in the direction of adhesives, adhesive types, other rubber adhesives, etc., can solve the problems of affecting the light-emitting effect of the light guide plate, the light guide plate cannot be used, and the residual glue of the light guide plate, etc., to achieve Good anti-sticking effect, easy processing, and the effect of reducing production costs

Active Publication Date: 2021-03-23
永新股份(黄山)包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing light guide plate protective film cannot be pasted after the light guide plate is torn off, and the production consumption is large; and the adhesive force is unstable, especially with the change of temperature, the adhesive force fluctuates greatly, and the adhesive force may be too low or too high , unable to meet the normal production needs; at the same time, after the protective film is torn off, there will be residual glue on the surface of the light guide plate, resulting in the situation that the light guide plate cannot be used; and after the protective film is pasted on the light guide plate, small molecular substances will be precipitated, which will affect the luminescence of the light guide plate Effect

Method used

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  • Liquid crystal backlight light guide plate self-adhesive protective film and production method thereof
  • Liquid crystal backlight light guide plate self-adhesive protective film and production method thereof
  • Liquid crystal backlight light guide plate self-adhesive protective film and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1. Weigh the self-adhesive layer 1 including 75 parts by mass of polyethylene and 25 parts by mass of soft rubber resin, the middle layer 2 includes 50 parts by mass of low-density polypropylene and 50 parts by mass of high-density polyethylene, and the unwinding layer 3 includes 50 parts by mass of Part block copolymer polypropylene, 50 parts by mass of low density polyethylene and 2 parts by mass of opening agent, and then the materials contained in self-adhesive layer 1, middle layer 2 and unwinding layer 3 are respectively put into multi-layer co-extrusion casting In the suction barrel corresponding to the casting machine, the vacuum negative pressure of the casting machine is transported to the extruder hopper of the casting machine to be plasticized into a melt;

[0035] S2, the melt in step S1 is extruded through the screw rod of the extruder, then filtered by a filter, distributed to the die head through a distributor, and cooled by a casting roll and a cooling ...

Embodiment 2

[0038]S1. Weigh the self-adhesive layer 1 including 70 parts by mass of polyethylene and 30 parts by mass of soft rubber resin, the middle layer 2 includes 45 parts by mass of low-density polypropylene and 55 parts by mass of high-density polyethylene, and the unwinding layer 3 includes 49 parts by mass Part block copolymerized polypropylene, 48 parts by mass of low density polyethylene and 3 parts by mass of opening agent, and then the materials contained in self-adhesive layer 1, middle layer 2 and unwinding layer 3 are respectively put into multi-layer co-extrusion casting In the suction barrel corresponding to the casting machine, the vacuum negative pressure of the casting machine is transported to the extruder hopper of the casting machine to be plasticized into a melt;

[0039] S2, the melt in step S1 is extruded through the screw rod of the extruder, then filtered by a filter, distributed to the die head through a distributor, and cooled by a casting roll and a cooling ...

Embodiment 3

[0042] S1. Weigh the self-adhesive layer 1 including 80 parts by mass of polyethylene and 20 parts by mass of soft rubber resin, the middle layer 2 includes 55 parts by mass of low-density polypropylene and 45 parts by mass of high-density polyethylene, and the unwinding layer 3 includes 50 parts by mass of Part block copolymer polypropylene, 50 parts by mass of low density polyethylene and 3 parts by mass of opening agent, and then the materials contained in the self-adhesive layer 1, the middle layer 2 and the unwinding layer 3 are respectively put into the multi-layer co-extrusion cast In the suction barrel corresponding to the casting machine, the vacuum negative pressure of the casting machine is transported to the extruder hopper of the casting machine to be plasticized into a melt;

[0043] S2, the melt in step S1 is extruded through the screw rod of the extruder, then filtered by a filter, distributed to the die head through a distributor, and cooled by a casting roll a...

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Abstract

The invention relates to a liquid crystal backlight source light guide plate self-adhesive protective film and a production method thereof, and belongs to the field of thin film materials, the protective film is composed of a self-adhesive layer, a middle layer and an unwinding layer which are connected in sequence; wherein the self-adhesive layer comprises 70-80 parts by mass of low-density polyethylene and 20-30 parts by mass of soft rubber resin, the middle layer comprises 40-60 parts by mass of low-density polypropylene and 40-60 parts by mass of high-density polyethylene, and the unwinding layer comprises 40-55 parts by mass of block copolymer polypropylene, 40-55 parts by mass of low-density polyethylene and 2-5 parts by mass of an opening agent. Compared with the existing protectivefilm, the self-adhesive protective film prepared by the invention can be torn down to be re-adhered after being adhered to the light guide plate, the adhesive force is stable, the change of the adhesive force is small, meanwhile, the influence of the change of the temperature on the adhesive force of the protective film is small, the adhesive force is controlled within a standard range, and the normal production and processing requirements can be met.

Description

technical field [0001] The invention relates to the field of packaging, in particular to a self-adhesive protective film for a liquid crystal backlight light guide plate and a production method thereof. Background technique [0002] The light guide plate is made of optical-grade acrylic / PC sheet, and then high-tech materials with high reflectivity and non-absorbing light are used. Laser engraving, V-shaped cross grid engraving, and UV screen printing technology are used on the bottom surface of the optical-grade acrylic sheet Print light guide dots. The optical-grade acrylic plate is used to absorb the light emitted from the lamp to stay on the surface of the optical-grade acrylic plate. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection condition and be emitted from the front of the light guide plate. Through light guide points of various densities and sizes, the light guide plate can be made to emit l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/30C09J123/06C09J121/00C08L23/12C08L23/06C08L53/02C08J5/18
CPCC09J7/29C09J7/30C09J123/06C08J5/18C09J2423/106C09J2423/046C09J2453/006C09J2423/04C08J2323/12C08J2323/06C08J2353/00C08J2423/12C08J2423/06C08L21/00
Inventor 叶青松吴文武程赛标郎宇奇
Owner 永新股份(黄山)包装有限公司
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