Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof

A biaxial stretching, multi-layer co-extrusion technology, applied in the field of optical polyester film and its manufacturing, can solve the problems of large equipment investment, complex manufacturing process and reduced tensile strength.

Active Publication Date: 2014-04-30
四川东方绝缘材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deficiencies of the prior art are: one, the manufacturing process of the method for coating the polyethylene terephthalate base film surface is relatively complicated, and the equipment investment is large; the other is that light is reflected by tiny bubbles or holes. The method is limited in improving the light reflectivity, and it is difficult to meet the demand. At the same time, as the number of bubbles or holes in the light reflective film increases, the light reflective film becomes soft and the tensile strength decreases.

Method used

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  • Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof
  • Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof
  • Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0067] The first part A layer film compound (embodiment 1-1~1-15)

[0068] The percentages of materials in the following examples are all percentages by mass.

[0069] Example 1-1:

[0070] 79.88% polyester chips, 5% rutile titanium oxide with a particle size of 15 μm, 15% barium sulfate with a particle size of 10 μm, 0.05% H10 heat stabilizer, 0.05% 770 light stabilizer, 0.02% OB-1 fluorescent whitening agent in the material The mixture was evenly mixed in the silo, and after being dehydrated and dried, it was melt-extruded and granulated by a twin-screw extruder at 285°C to obtain a layer A film mixture, which was set aside.

Embodiment 1-2

[0072] 75.75% polyester chips, 8% rutile titanium oxide with a particle size of 14 μm, 16% barium sulfate with a particle size of 10 μm, 0.1% H10 heat stabilizer, 0.1% 770 light stabilizer, 0.05% OB-1 fluorescent whitening agent in the material The mixture was evenly mixed in the silo, and after being dehydrated and dried, it was melt-extruded and granulated by a twin-screw extruder at 285°C to obtain a layer A film mixture, which was set aside.

Embodiment 1-3

[0074] 71.5% polyester chips, 8% rutile titanium oxide with a particle size of 12 μm, 20% barium sulfate with a particle size of 7 μm, 0.2% H10 heat stabilizer, 0.2% EV-761 light stabilizer, 0.1% OB-1 fluorescent whitening agent Mix evenly in the silo, after dehydration and drying, melt extrude and granulate by twin-screw extruder at 280°C to obtain layer A film compound, which is ready for use.

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Abstract

The invention discloses a multilayered co-extruded bidirectional-stretching light reflection polyester thin film and a manufacturing method thereof. The thin film is characterized by being composed of layers A and layers B and has a three-layered or five-layered structure; the sum of the thicknesses of the layers A is 10%-20% of the total thickness of the thin film; each layer A is composed of following materials in percentage by weight: 62.5%-79.88% of polyethylene glycol terephthalate slices, 20%-35% of inorganic particles, 0.05%-1% of a heat stabilizing agent, 0.05%-1% of a light stabilizing agent and 0.02%-0.5% of a fluorescent whitening agent; each layer B is composed of following materials in percentage by weight: 68%-80% of the polyethylene glycol terephthalate slices, 19.9%-30% of functional resin, 0.05%-1% of a heat stabilizing agent and 0.05%-1% of a light stabilizing agent. The thin film disclosed by the invention has the high reflectance and the ageing-resistant performance and can be applied to fields of parts of liquid crystal panels or planar light sources, illumination tools, illumination advertising boards and the like.

Description

technical field [0001] The invention belongs to an optical polyester film and its manufacture, and relates to a multilayer co-extruded biaxially stretched light-reflecting polyester film and a manufacturing method thereof. The multi-layer co-extruded biaxially stretched light-reflecting polyester film of the present invention has high reflectivity and aging resistance, is suitable for the manufacture of related components such as LED lighting, liquid crystal display, and can be applied to components of liquid crystal panels or planar light sources, and lighting appliances , Lighting billboards and other fields. Background technique [0002] Light reflective film is mainly used in the fields of liquid crystal display panels or planar light sources, lighting fixtures, lighting billboards, etc. , so as to reduce light loss and provide sufficient light saturation for liquid crystal display panels or planar light sources. Different from general lighting, LED lighting and liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/36B32B3/24B32B37/00
Inventor 孙囡胡俊祥罗春明周柯
Owner 四川东方绝缘材料股份有限公司
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