Polyvinyl alcohol film for diffuser

A technology of polyvinyl alcohol film and polyvinyl alcohol, applied in the direction of polarizing elements, etc., can solve the problems of unsatisfactory strength, elongation and durability, and achieve the effect of improving strength and durability and reducing manufacturing costs

Active Publication Date: 2007-09-12
乐凯光电材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the application number 02156662.3 discloses a polyvinyl alcohol film for polarizers. The polyvinyl alcohol film is made of polyvinyl alcohol with a single degree of polymerization. It is difficult to obtain very satisfactory results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Polyvinyl alcohol (polymerization degree 1000, saponification degree 99.0 mol%) 10 parts

[0032] Polyvinyl alcohol (polymerization degree 1700, saponification degree 99.0 mol%) 5 parts

[0033] Glycerol 5 parts

[0034] Sodium dodecylbenzenesulfonate 1 part

[0035] 100 parts of water

[0036] After mixing 10 parts of polyvinyl alcohol (polymerization degree 1000, saponification degree 99.0 mol%) and 5 parts of polyvinyl alcohol (polymerization degree 1700, saponification degree 99.0 mol%), add 5 parts of glycerol, 1 part of Sodium dodecylbenzenesulfonate and 100 parts of water were prepared in a water bath to prepare a PVA aqueous solution, which was filtered and defoamed, and cast to obtain a PVA film with a thickness of 74.8 μm.

[0037] To measure the degree of swelling of the PVA film, the PVA film was swelled in distilled water at 50° C. for 10 minutes under stirring, and the swelling degree was measured to be 175%.

[0038] The obtained film has good strengt...

Embodiment 2

[0040] Polyvinyl alcohol (polymerization degree 1200, saponification degree 99.0 mol%) 2 parts

[0041] Polyvinyl alcohol (polymerization degree 1700, saponification degree 99.0 mol%) 8 parts

[0042] Trimethylolpropane 10 parts

[0043] Polyoxyethylene octylphenyl ether 1 part

[0044] Dimethyl sulfoxide 50 parts

[0045] After mixing 2 parts of polyvinyl alcohol (polymerization degree 1200, saponification degree 99.0 mol %) and 8 parts of polyvinyl alcohol (polymerization degree 1700, saponification degree 99.0 mol %), add 10 parts of trimethylolpropane, 1 1 part of polyoxyethylene octylphenyl ether and 5 parts of dimethyl sulfoxide were prepared in a water bath to prepare a PVA aqueous solution, filtered and defoamed, and cast to obtain a PVA film with a thickness of 75.1 μm.

[0046] To measure the degree of swelling of the PVA film, the PVA film was swelled in distilled water at 50° C. for 10 minutes under stirring, and the swelling degree was measured to be 180%.

[...

Embodiment 3

[0049] Polyvinyl alcohol (polymerization degree 1000, saponification degree 95.0 mol%) 5 parts

[0050] Polyvinyl alcohol (polymerization degree 2000, saponification degree 99.0 mol%) 25 parts

[0051] Diethylene glycol 10 parts

[0052] Diethyl oleate amide 2 parts

[0053] Glycerin 50 parts

[0054] N-Methylpyrrolidone 100 parts

[0055] After mixing 5 parts of polyvinyl alcohol (polymerization degree 1000, saponification degree 95.0 mol%) with 25 parts of polyvinyl alcohol (polymerization degree 2000, saponification degree 99.0 mol%), add 10 parts of diethylene glycol, 2 parts of Diethyl oleate amide, 50 parts of glycerin, and 100 parts of N-methylpyrrolidone are prepared in a water bath to prepare a PVA aqueous solution. After degassing by filtration, casting was performed to obtain a PVA film with a thickness of 75.3 μm.

[0056] To measure the degree of swelling of the PVA film, the PVA film was swelled in distilled water at 50° C. for 10 minutes under stirring, and t...

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Abstract

The invention relates to a polyvinyl alcohol membrane for the polarizing film, which is used to solve the problem of high-performance PVA film. The composition and weight of shares of the polyvinyl alcohol membrane: 10-30 units of PVA polymer, 5-25 units of plasticizer, 1-5 units of surfactant, 50 - 200 units of solvent. The PVA membrane has a high strength, good extension, which can be widely applied to liquid crystal display (LCD).

Description

technical field [0001] The invention relates to a polyvinyl alcohol film, in particular to a polyvinyl alcohol film for a polarizer. Background technique [0002] Polarizer is an important part of liquid crystal display (LCD). Due to its unique optical properties, it is also a sheet material similar to plastic sheet, which is easy to process and use. Therefore, it is used in daily necessities, industrial transportation, national defense and It has a wide range of applications in cutting-edge science and technology. [0003] At present, the largest use of polarizers is for various types of liquid crystal display devices (LCDs). The application fields of this LCD have also expanded from small machines such as desktop calculators and watches in the early days to notebook computers and LCD monitors in recent years. devices, LCD color projectors, car navigation systems, LCD TVs, mobile phones, and measuring instruments used indoors and outdoors. If the polarizer has a defect, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08J5/18C08K5/05G02B5/30
Inventor 杨秋玲王香艳
Owner 乐凯光电材料有限公司
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