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A high stiffness and high reflectivity reflective film

A high reflectivity, reflective film technology, applied in the field of reflective film, can solve the problems that affect the brightness and picture quality of backlight and display, the reflective film is easy to scratch, wrinkle, affect the use and processing, etc., to eliminate tearing phenomenon, improve Production stability and yield, the effect of improving tear resistance

Active Publication Date: 2015-08-26
HEFEI LUCKY SCI & TECH IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the reflectivity, generally by adding particles or making the reflective film produce micropores or bubbles, the reflectivity is improved by using the refraction of the particles or the refractive index difference between the substrate resin of the film and the micropores or bubbles. Although these methods can improve The reflectivity of the film, however, with the increase of the porosity in the reflective film, the reflective film becomes softer, causing the reflective film to be easily scratched and wrinkled during use and processing, which affects the brightness and picture quality of the backlight and display
[0004] The Chinese patent with the application number 201110120217.2 discloses a high-reflection and high-stiffness light reflection film, which adopts at least three-layer structure, and each layer contains pores. Although such a reflection film has a high reflectivity, the reflection The film is soft and the stiffness is not enough, which affects the later use and processing

Method used

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  • A high stiffness and high reflectivity reflective film
  • A high stiffness and high reflectivity reflective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing titanium dioxide additives evenly so that the final concentration of titanium dioxide particles is 60%, and put the mixed chips at 170°C Crystallize, dry, and then send the crystallized material into the layer A extruder to melt and extrude at 275°C.

[0026] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing silica additives evenly, crystallize the mixed chips at 170°C, dry, and then crystallize The good material is fed into the B-layer extruder and melted and extruded at 275°C.

[0027] The melt of layer A and layer B is filtered and then enters the double-cavity die and flows to the casting rolls to be cast into amorphous slabs. The thickness ratio of layer A to layer B is 65 / 35, and the cast sheet is longitudinally stretched 2.9 times after longitudinal preheating. Stretch 3.5 t...

Embodiment 2

[0029] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing silica additives evenly so that the final concentration of silica particles is 55%, and the mixed The slices were crystallized at 170°C, dried, and then the crystallized material was sent to the layer A extruder to be melted and extruded at 275°C.

[0030] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing silica additives evenly, crystallize the mixed chips at 170°C, dry, and then crystallize The good material is fed into the B-layer extruder and melted and extruded at 275°C.

[0031] The melt of layer A and layer B is filtered and then enters the double-cavity die and flows to the casting rolls to be cast into amorphous slabs. The thickness ratio of layer A to layer B is 70 / 30, and the cast sheet is longitudinally preheated and stretched 2.9 times longitudinally. Stretch 3.5 times...

Embodiment 3

[0033] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing titanium dioxide additives evenly so that the final concentration of titanium dioxide particles is 45%, and put the mixed chips at 170°C Crystallize, dry, and then send the crystallized material into the layer A extruder to melt and extrude at 275°C.

[0034] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g and masterbatch chips containing silica additives evenly, crystallize the mixed chips at 170°C, dry, and then crystallize The good material is fed into the B-layer extruder and melted and extruded at 275°C.

[0035] The melt of layer A and layer B is filtered and then enters the double-cavity die and flows to the casting rolls to be cast into amorphous slabs. The thickness ratio of layer A to layer B is 25 / 75, and the cast sheet is longitudinally stretched 2.9 times after longitudinal preheating. Stretch 3.5 t...

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Abstract

The invention relates to a reflective film with high stiffness and high reflectivity. The reflective film comprises a polyester layer A containing pores therein and a polyester layer B without pores therein, and the porosity of the polyester layer A is 8-26%. The reflective film is simple in structure, high in stiffness, and good in coordination between the film stiffness and the reflectivity, wherein reflecting property in a film plane is uniform, the tearing strength resistance of the reflective film is improved, the tearing phenomenon in a later cutting process is eliminated, the production stability and the yield are improved, and the reflective film is particularly suitable for large-size displays due to high stiffness.

Description

technical field [0001] The invention relates to a reflective film for a backlight source used in a liquid crystal display, in particular to a reflective film with high stiffness and high reflectivity. Background technique [0002] Currently, liquid crystal displays are widely used as display devices in devices such as cellular phones, computers, televisions, and instruments. The liquid crystal display itself does not emit light, and needs to provide illumination light through a backlight source. In order to improve the utilization rate of light in the backlight source, it is necessary to assemble a reflective film to reduce the loss caused by light leakage, increase the brightness of the display, and further improve the picture quality of the display. [0003] In order to improve the reflectivity, generally by adding particles or making the reflective film produce micropores or bubbles, the reflectivity is improved by using the refraction of the particles or the refractive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/24B32B27/18B32B27/36
Inventor 张月恒张玉安
Owner HEFEI LUCKY SCI & TECH IND
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