Reflecting film

A reflective film, hollow technology, applied in the field of film manufacturing, can solve the problems of poor stiffness and toughness, reduced tensile strength and elongation at break, brittle film, etc., to achieve good stiffness and toughness, improve reflectivity, The effect of reducing dosage

Active Publication Date: 2013-04-03
HEFEI LUCKY SCI & TECH IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of these inorganic particles or incompatible resins is generally maintained at a high ratio, and a large amount of added inorganic particles or incompatible resins has a serious impact on the mechanical and mechanical properties of the film, causing the film to become brittle. Poor stiffness and toughness, significantly lower tensile strength and elongation at break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The masterbatch containing 35% hollow resin particles cross-linked styrene-propylene and virgin polyester chips were mixed at a ratio of 14:86. Melt in a twin-screw extruder and cast on a rotating cooling roll to obtain an amorphous cast slab with a thickness of about 2000 μm. Carry out longitudinal stretching, send the longitudinally stretched sheet film to a transverse tenter, and carry out transverse stretching at a ratio of 3.2:1 under the condition of about 110°C, and the polyester film oriented by biaxial stretching is Heat setting at about 180°C, and finally after cooling, winding and other processes to obtain a reflective film, measure its reflectivity, tensile strength and elongation at break.

Embodiment 2

[0036] A masterbatch containing 35% hollow resin particles cross-linked styrene-propylene and virgin polyester chips were mixed in a ratio of 43:57. Melt in a twin-screw extruder and cast on a rotating cooling roll to obtain an amorphous cast slab with a thickness of about 2000 μm. Carry out longitudinal stretching, send the longitudinally stretched sheet film to a transverse tenter, and carry out transverse stretching at a ratio of 3.2:1 under the condition of about 110°C, and the polyester film oriented by biaxial stretching is Heat setting at about 180°C, and finally after cooling, winding and other processes to obtain a reflective film, measure its reflectivity, tensile strength and elongation at break.

Embodiment 3

[0038] A masterbatch containing 45% hollow resin particles cross-linked styrene-propylene and virgin polyester chips were mixed in a ratio of 44:56. Melt in a twin-screw extruder and cast on a rotating cooling roll to obtain an amorphous cast slab with a thickness of about 2000 μm. Carry out longitudinal stretching, send the longitudinally stretched sheet film to a transverse tenter, and carry out transverse stretching at a ratio of 3.2:1 under the condition of about 110°C, and the polyester film oriented by biaxial stretching is Heat setting at about 180°C, and finally after cooling, winding and other processes to obtain a reflective film, measure its reflectivity, tensile strength and elongation at break.

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Abstract

Disclosed is a reflecting film. The reflecting film contains hollow resin particles incompatible with polyester, the average outer diameter of the hollow resin particles is smaller than 3 micrometers, the average inner diameter of the hollow resin particles is smaller than 2 micrometers, and the distribution density of the hollow resin particles in the reflecting film is higher than 0.07 per square micrometer. The particle consumption of the reflecting film is low, the reflecting film keeps good stiffness and tenancy while the refractivity of the reflecting film is improved, and the reflecting film is excellent in mechanical performance. Besides, the relative reflectivity of the reflecting film is higher than 97%, and the reflecting film is suitable for the field of panel display backlight modules.

Description

technical field [0001] The invention relates to a reflective film and belongs to the technical field of thin film manufacturing. 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 index difference between the substrate resin of the film and the micropo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02B1/04
Inventor 周通高青童晨程龙宝张希堂
Owner HEFEI LUCKY SCI & TECH IND
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