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A fold-resistant polyester reflective film and its preparation method

A reflective film, polyester technology, applied in the field of optical reflective film, can solve the problems of reflective film creases, etc., and achieve the effect of high reflectivity, stiffness, and excellent folding resistance

Active Publication Date: 2019-03-12
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the phenomenon that the existing reflective film is prone to creases, the present invention provides a fold-resistant polyester reflective film and its preparation method

Method used

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  • A fold-resistant polyester reflective film and its preparation method
  • A fold-resistant polyester reflective film and its preparation method
  • A fold-resistant polyester reflective film and its preparation method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0051] The invention provides a refraction-resistant polyester reflective film, wherein the proportion of layer A is 98% of PET chips and 2% of silicon dioxide particles. The proportion of layer B is 67% PET chip, intrinsic viscosity 0.68dL / g, 15% rutile type titanium dioxide, 5% poly-4-methyl-1-pentene (melt index=2g / 10min (2.16kg, 230 ℃ )), 5% poly-4-methyl-1-pentene (melt index = 180g / 10min (2.16kg, 230°C)), 5% MAH grafted PE (grafting rate ≥ 0.5%), 2% MOCA , 0.5% sodium benzoate, 0.5% polyethylene wax, and the percentages are percentages by weight. A layer A accounts for 6% of the total thickness, and a layer B accounts for 88% of the total thickness. The thickness of the obtained reflective film is 188 μm, and the relevant properties are shown in Table 1.

Embodiment 2

[0053] The invention provides a refraction-resistant polyester reflective film, the proportion of layer A is 98% of PET slices and 2% of silicon dioxide particles. The proportion of layer B is 60% PET chips, intrinsic viscosity 0.68dL / g, 20% anatase titanium dioxide, 8% polyethylene (melt index = 4g / 10min (2.16kg, 230°C)), 6% poly-4 - Methyl-1-pentene (melt index = 50g / 10min (2.16kg, 230°C)), 3% MAH grafted PE (grafting rate ≥ 0.5%), 2% MOCA, 0.5% sodium benzoate, 0.5% Polyethylene wax, said percentage is weight percentage. A layer A accounts for 6% of the total thickness, and a layer B accounts for 88% of the total thickness. The thickness of the obtained reflective film is 188 μm, and the relevant properties are shown in Table 1.

Embodiment 3

[0055] The invention provides a refraction-resistant polyester reflective film, the proportion of layer A is 98% of PET slices and 2% of silicon dioxide particles. The proportion of layer B is 61% PET chips, intrinsic viscosity 0.68dL / g, 20% barium sulfate, 4% polypropylene (melt index = 2g / 10min (2.16kg, 230°C)), 8% poly-3-methyl -1-butene (melt index = 65g / 10min (2.16kg, 230°C)), 4% MAH grafted PP (grafting rate ≥ 0.5%), 2% DA, 0.5% sodium stearate, 0.5% poly Ethylene wax, said percentage is percentage by weight. A layer accounts for 6% of the total thickness, and B layer accounts for 88% of the total thickness. The thickness of the obtained reflective film is 188 μm, and the relevant properties are shown in Table 1.

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Abstract

The invention relates to an optical reflection film, in particular to a folding-resistant polyester reflection film and a preparation method thereof. In order to solve the phenomenon that existing reflective films are prone to creases, the invention provides a fold-resistant polyester reflective film and a preparation method thereof. The reflective film has an ABA three-layer structure; in the ABA three-layer structure of the reflective film, the thickness of a layer A accounts for 4-10% of the total thickness, and the thickness of the B layer accounts for 80-92% of the total thickness; The material of the A layer includes polyester resin and inorganic particles, the content of the polyester resin is 80-98%, and the content of the inorganic particles is 2-20%; the material of the B layer includes polyester resin, inorganic particles, non-phase Compatible resin α, incompatible resin β, toughening resin, chain extender, nucleating agent, dispersant. The reflective film provided by the invention has excellent folding resistance, high reflectivity and high stiffness.

Description

technical field [0001] The invention relates to an optical reflection film, in particular to a folding-resistant polyester reflection film and a preparation method thereof. Background technique [0002] The reflective film is a part of the components of the backlight module of the flat panel display. It is located at the bottom of the backlight module and under the light guide plate. , so as to reduce light loss and increase brightness. [0003] Generally, the reflector of the side-lit backlight module is placed at the bottom of the light guide plate, and the light leaked from the bottom surface is reflected back into the light guide plate to prevent the light source from leaking out, so as to increase the efficiency of light use; while the direct-lit backlight module is placed on the reflector. The bottom surface of the light box is or pasted on it, and the light beam reflected by the diffuser plate is reflected back to the diffuser plate from the bottom of the light box f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/08B32B27/20B32B27/36B32B27/06
CPCB32B27/08B32B27/20B32B27/36B32B2250/03B32B2250/244B32B2250/40B32B2264/12B32B2305/30B32B2307/416B32B2457/00G02B5/08
Inventor 金亚东周玉波
Owner NINGBO CHANGYANG TECH