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Polyester reflecting film for large-size thin display

A reflective film and display technology, which is applied in the field of polyester film manufacturing, can solve the problems of low light utilization rate, attenuation of film mechanical and mechanical properties, poor stiffness and toughness, etc., so as to improve mechanical and mechanical properties and improve application feasibility , the effect of high effective reflectivity

Pending Publication Date: 2022-04-12
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of particles in the reflective film is generally in a relatively high proportion, which seriously attenuates the mechanical and mechanical properties of the film, resulting in brittle film, poor stiffness and toughness.
At the same time, due to the thinning of the display, the distance between the light source and the reflective film is greatly reduced, and the surface of the conventional reflective film has a low utilization rate of light at high angles, resulting in uneven brightness and darkness of the backlight.
In order to improve the angular reflection performance, some technical solutions adopt the method of coating a diffusion layer on the surface, but the particles in this diffusion layer have poor adhesion and are easy to fall off, causing component pollution or even scrapping

Method used

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  • Polyester reflecting film for large-size thin display
  • Polyester reflecting film for large-size thin display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] On a multi-layer co-extrusion film-making plant with extruder (a) and extruder (b), in order to form a matte layer (A layer), the pre-mixed masterbatch (A) and virgin polyester chips are , supplied to the extruder (a), melt-extruded at 280° C., and introduced into a T-die. In order to form the reflective layer (B layer), the pre-mixed masterbatch (B) and pure polyester chips are supplied to the extruder (b), melted and extruded at 280°C, and introduced into a T-die. The extruder (a) and the extruder (b) extrude synchronously and lead into the T die head synchronously.

[0063] In the T-die head, the melt of the extruder (a) is evenly distributed to both sides of the melt of the extruder (b), and the two sets of melts are laminated according to the A / B / A three-layer structure Converge and flow in sheet form on a rotating cold drum with a surface temperature of 20°C to obtain a laminated cast film. The laminated cast film is preheated at 70-85°C, and stretched longitudi...

Embodiment 2

[0073] Use the same equipment and process conditions as in Example 1.

[0074] In this example,

[0075] Raw material ratio of layer A is, masterbatch (A): pure polyester chips = 33:67

[0076] Raw material ratio of layer B is, masterbatch (B): pure polyester chips = 50:50

[0077] The ratio of layer A to layer B is, layer A:layer B=200:1000

[0078] in,

[0079] Pure polyester chip: same as embodiment 1.

[0080] Masterbatch (A): Same as Example 1.

[0081] Masterbatch (B): Same as Example 1.

Embodiment 3

[0083] Use the same equipment and process conditions as in Example 1.

[0084] In this example,

[0085] Raw material ratio of layer A is, masterbatch (A): pure polyester chips = 20:80

[0086] Raw material ratio of layer B is, masterbatch (B): pure polyester chips = 50:50

[0087] The ratio of layer A to layer B is, layer A:layer B=200:1500

[0088] in,

[0089] Pure polyester chip: same as embodiment 1.

[0090]Masterbatch (A): the content of matte particle glass microspheres is 10%; the refractive index of glass microspheres is 1.51.

[0091] Master batch (B): syndiotactic polystyrene content 60%; syndiotactic polystyrene, DSC test, melting point Tm = 269 ° C, glass transition temperature Tg = 99 ° C; nuclear magnetic resonance test, structural unit regularity 95%.

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Abstract

The invention belongs to the field of polyester film manufacturing, and particularly relates to a polyester reflecting film for a large-size thin display, which is characterized in that the polyester reflecting film comprises a reflecting layer and matte layers positioned on two sides of the reflecting layer, the reflecting layer is named as a B layer, and the B layer is named as a C layer. The matte layer is named as a layer A; the layer B has a microporous structure; the pore diameter of the microporous structure is 5-30 [mu] m, and the distribution density of micropores on the cross section is 20,000-50,000 per square millimeter; matte particles are dispersed on the A layer; and the glossiness of the layer A is less than or equal to 15 degrees at 85 degrees. The polyester reflecting film disclosed by the invention is a polyester reflecting film with relatively good stiffness and an excellent high-angle reflecting effect.

Description

technical field [0001] The invention belongs to the field of polyester film manufacture, in particular to a polyester reflective film used for large-scale thin displays. Background technique [0002] Polyester reflective film is widely used in backlight modules of LCD display devices such as mobile phones, computers, flat-panel TVs, and monitors. In order to improve the utilization rate of light in the backlight module, reduce the loss caused by light leakage, increase the brightness of the display, and then improve the picture quality of the display, the reflective film is required to have a high reflectivity. In order to make the reflective film have a higher reflectivity, particles are usually added to the polyester film, and the interface between the polyester and the particles and the hole interface of the tiny holes generated with the particles as the nucleus are used to increase the reflectivity of light. [0003] In recent years, with the development trend of thinne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08B32B27/36B32B27/30B32B27/06B32B27/08B32B27/18
Inventor 周通王会荣李超张世泽程龙宝杜坤宋瑞然
Owner HEFEI LUCKY SCI & TECH IND
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