Polyvinyl alcohol film and preparation method thereof

A polyvinyl alcohol film, polyvinyl alcohol technology, applied in the field of optical materials, can solve problems such as poor tensile properties, affecting the imaging quality of liquid crystal displays, and polarizer defects

Active Publication Date: 2014-10-08
重庆光谱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this polyvinyl alcohol film is used as a polarizing layer, has poor tensile properties, and the manufactured polarizer has defects, which affects the imaging quality of liquid crystal displays.

Method used

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  • Polyvinyl alcohol film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0060] The present invention also provides a kind of preparation method of polyvinyl alcohol film, comprises the following steps:

[0061] melting and co-extruding the first component, the second component and the third component to obtain a polyvinyl alcohol film;

[0062] The first component includes first polyvinyl alcohol, and the degree of polymerization of the first polyvinyl alcohol is 3000-4000;

[0063] The second component includes a second polyvinyl alcohol, and the degree of polymerization of the second polyvinyl alcohol is 1000-3000;

[0064] The third component includes third polyvinyl alcohol, and the degree of polymerization of the third polyvinyl alcohol is 3000-4000.

[0065] In the present invention, the first component is consistent with the first component in the above technical solution, and will not be repeated here. In the present invention, the components included in the first component are preferably mixed to obtain the first component;

[0066] In...

Embodiment 1

[0076] Mix 100 parts by mass of polyvinyl alcohol with a degree of polymerization of 3500 and a degree of alcoholysis of 99.5%, 13 parts by mass of glycerol, 0.1 part by mass of lauric acid diethanolamide and 220 parts by mass of water to obtain the first component;

[0077] Mix 150 parts by mass of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 99.5%, 19.5 parts by mass of glycerol, and 329 parts by mass of water to obtain the second component;

[0078] Mix 100 parts by mass of polyvinyl alcohol with a degree of polymerization of 3500 and a degree of alcoholysis of 99.5%, 13 parts by mass of glycerol, 0.1 part by mass of lauric acid diethanolamide and 220 parts by mass of water to obtain a third component;

[0079] Using a three-layer dissolving co-extrusion equipment, the obtained first component, second component and third component were simultaneously extruded and cast on a steel belt at 90°C, and after drying for 5 minutes, polyvin...

Embodiment 2

[0089] Mix 100 parts by mass of polyvinyl alcohol with a degree of polymerization of 3200 and a degree of alcoholysis of 99.7%, 10 parts by mass of glycerol, 0.3 parts by mass of lauric acid diethanolamide and 300 parts by mass of water to obtain the first component;

[0090] Mix 150 parts by mass of polyvinyl alcohol with a degree of polymerization of 2000 and a degree of alcoholysis of 99.2%, 15 parts by mass of glycerol, and 450 parts by mass of water to obtain the second component;

[0091] Mix 100 parts by mass of polyvinyl alcohol with a degree of polymerization of 3200 and a degree of alcoholysis of 99.7%, 10 parts by mass of glycerol, 0.3 parts by mass of lauric acid diethanolamide and 300 parts by mass of water to obtain a third component;

[0092] Using a three-layer dissolving co-extrusion equipment, the obtained first component, second component and third component were simultaneously extruded and cast on a steel belt at 90°C, and after drying for 5 minutes, polyvinyl...

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Abstract

The invention provides a polyvinyl alcohol film which comprises a first polyvinyl alcohol layer, a second polyvinyl alcohol layer and a third polyvinyl alcohol layer, wherein the first polyvinyl alcohol layer is prepared from a first component comprising first polyvinyl alcohol; the polymerization degree of the first polyvinyl alcohol is 3000-4000; the second polyvinyl alcohol layer is arranged on the first polyvinyl alcohol layer and is prepared from a second component comprising second polyvinyl alcohol; the polymerization degree of the second polyvinyl alcohol is 1000-3000; the third polyvinyl alcohol layer is arranged on the second polyvinyl alcohol layer and is prepared from a third component comprising third polyvinyl alcohol; the polymerization degree of the third polyvinyl alcohol is 3000-4000. The polyvinyl alcohol film provided by the invention is formed by compounding three polyvinyl alcohol layers containing polyvinyl alcohol with different polymerization degrees, so that the polyvinyl alcohol film provided by the invention has high tensile property. The invention also provides a method for preparing the polyvinyl alcohol film.

Description

technical field [0001] The invention belongs to the technical field of optical materials, in particular to a polyvinyl alcohol film and a preparation method thereof. Background technique [0002] Displays with advanced functions have gradually become an important feature of today's consumer electronics products. Among them, liquid crystal displays have small size, thin thickness, light weight, low energy consumption, low operating voltage, no radiation, no flicker, and can directly match with CMOS integrated circuits. Therefore, the application fields of liquid crystal displays have expanded from small machines such as desktop calculators and watches in the early days to notebook computers, liquid crystal monitors, liquid crystal color projectors, car navigation systems, liquid crystal TVs, mobile phones and indoor Various fields such as measuring instruments for external use. [0003] The imaging quality of LCD is the most important index to measure the quality of LCD. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/30G02B1/04G02B5/30
Inventor 古文正吕新坤胡明源江林任大磊
Owner 重庆光谱新材料科技有限公司
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