A kind of liquid crystal backlight light guide plate self-adhesive protective film and production method thereof

A self-adhesive protective film and production method technology, applied in the direction of adhesives, adhesive types, other rubber adhesives, etc., can solve problems that affect 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: 2022-07-05
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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  • A kind of liquid crystal backlight light guide plate self-adhesive protective film and production method thereof
  • A kind of liquid crystal backlight light guide plate self-adhesive protective film and production method thereof
  • A kind of 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. The self-adhesive layer 1 includes 75 parts by mass of polyethylene and 25 parts by mass of soft rubber resin, the intermediate 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 Parts block copolymerized polypropylene, 50 parts by mass of low density polyethylene and 2 parts by mass of opening agent, and then put the materials contained in the self-adhesive layer 1, the middle layer 2 and the unwinding layer 3 into the multi-layer co-extrusion casting. In the suction barrel corresponding to the casting machine, it is transported to the extruder hopper of the casting machine through the vacuum negative pressure of the casting machine and plasticized into a melt;

[0035] S2, the melt in step S1 is extruded through the screw of the extruder, filtered by the filter, distributed to the die head through the distributor, and cooled to form a solid film thr...

Embodiment 2

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

[0039] S2, the melt in step S1 is extruded through the screw of the extruder, filtered by the filter, distributed to the die head through the distributor, and cooled to fo...

Embodiment 3

[0042] S1. The self-adhesive layer 1 includes 80 parts by mass of polyethylene and 20 parts by mass of soft rubber resin, the intermediate 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 50 parts by mass of block copolymerized polypropylene, 50 parts by mass of low density polyethylene and 3 parts by mass of opening agent, and then put the materials contained in the self-adhesive layer 1, the intermediate layer 2 and the unwinding layer 3 into the multi-layer co-extrusion casting. In the suction barrel corresponding to the casting machine, it is transported to the extruder hopper of the casting machine through the vacuum negative pressure of the casting machine and plasticized into a melt;

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

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Abstract

The invention relates to a self-adhesive protective film for a light guide plate of a liquid crystal backlight and a production method thereof, belonging to the field of film materials. parts of low density polyethylene and 20-30 parts by mass of soft rubber resin, the intermediate layer includes 40-60 parts by mass of low-density polypropylene and 40-60 parts by mass of high-density polyethylene, and the unrolled layer includes 40-55 parts by mass of block Copolymerized polypropylene, 40-55 parts by mass of low-density polyethylene, and 2-5 parts by mass of blocking agent. Compared with the existing protective film, the self-adhesive protective film prepared by the present invention can be peeled off and pasted after being attached to the light guide plate, and the adhesive force is stable and the adhesive force changes little. The influence is not large, and the viscosity is controlled within the standard range, which can meet the normal production and processing needs.

Description

technical field [0001] The invention relates to the field of packaging, in particular to a self-adhesive protective film of 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 uses high-tech materials with extremely high reflectivity and no light absorption to use laser engraving, V-shaped cross grid engraving, and UV screen printing technology on the bottom surface of the optical-grade acrylic sheet. Print light guide points. The optical-grade acrylic sheet is used to absorb the light emitted from the lamp and stay on the surface of the optical-grade acrylic sheet. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection conditions and be emitted from the front of the light guide plate. Through various light guide points of different density and size, the light guide plate can be ...

Claims

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Application Information

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Patent Type & Authority Patents(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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