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Method for preparing polaroid

A manufacturing method and polarizer technology, which is applied in the field of polarizer manufacturing, can solve problems such as screen display deformation, defects, and inability to suppress the shrinkage of polarizing films, and achieve the effects of thinner thickness and excellent durability

Inactive Publication Date: 2009-05-06
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in recent years, in order to be thinner and lighter, polarizers laminated with a transparent protective film on only one side of the polarizing film are also required. When such polarizers are exposed to a dry environment, shrinkage of the polarizing film cannot be suppressed and it is easy to produce bad tendencies
Therefore, as described above, when a liquid crystal cell in which a polarizing plate having a transparent protective film laminated on only one surface of the polarizing film is bonded with an adhesive is exposed to a dry environment, the adhesive at the edge of the polarizing plate may be peeled off or polarized. The screen display is distorted due to the bulge at the end of the chip

Method used

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  • Method for preparing polaroid

Examples

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Effect test

Embodiment 1

[0078] (A) Preparation of polarizing film

[0079] A polyvinyl alcohol film with an average degree of polymerization of about 2400, a saponification degree of 99.9 mol% or more, and a thickness of 75 μm is stretched approximately 5 times in a dry uniaxial manner, and then directly immersed in pure water at 60°C while maintaining tension After 1 minute, it was immersed in an aqueous solution having a weight ratio of iodine / potassium iodide / water of 0.1 / 5 / 100 at 28° C. for 60 seconds. Then, it was immersed in the aqueous solution whose weight ratio of potassium iodide / boric acid / water was 10.5 / 7.5 / 100 at 72 degreeC for 300 second. Next, after washing with pure water at 10° C. for 5 seconds, it was dried at 90° C. for 180 seconds to obtain a polarizing film in which iodine was adsorbed and aligned on polyvinyl alcohol.

[0080] (B) Preparation of adhesive

[0081] In addition, in 100 parts of water, 3 parts of fully saponified polyvinyl alcohol (Kurare Poba-ru 117H, manufacture...

Embodiment 2～5

[0089]

[0090] As shown in Table 1, the polarizing film was produced by changing the drying temperature and time of the polarizing film, and a polarizing plate with an adhesive layer was produced in the same manner as in Example 1.

[0091]

[0092] The polyvinyl alcohol film was subjected to dyeing treatment, boric acid treatment, and water washing, except that the drying conditions were changed to 140 seconds at 90°C, and the adsorption orientation on polyvinyl alcohol was obtained in the same manner as in (A) of Example 1. Polarizing film with iodine. On both sides of the polarizing film, pass the polyvinyl alcohol-based adhesive prepared by (B) of Example 1 and utilize nip rolls, and stick the same saponification treatment used in (C) of Example 1. A film with a thickness of 40 μm composed of triacetyl cellulose. While maintaining the tension of the bonded product at 320 N / m, it was dried at 50° C. for 5 minutes to obtain a polarizing plate.

[0093] On one side of ...

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Abstract

The present invention provides a method for manufacturing a polarizing disc, wherein, a transparent protective film is laminated on only one surface of polarizing film which is formed by polyvinyl alcohol resin and has a dimension changing rate lower than 2.7through an adhesive layer. The transparent protective film is preferably cellulose acetate resin in the method for manufacturing a polarizing disc. Additionally, preferably the other surface of polarizing film is formed with an additive layer that is formed by acrylic resin.

Description

technical field [0001] The present invention relates to a method of manufacturing a polarizing plate by laminating a transparent protective film on only one surface of a polarizing film made of a polyvinyl alcohol-based resin through an adhesive layer. Background technique [0002] A polarizing plate is widely used as a polarized light supply element in a liquid crystal display device or as a polarized light detection element. As the above-mentioned polarizing plate, a polarizing plate in which a transparent protective film made of triacetyl cellulose is bonded to a polarizing film made of polyvinyl alcohol-based resin is currently used, but in recent years, with the introduction of liquid crystal display devices to notebooks, The development of mobile devices such as small personal computers and mobile phones, or the development of large TVs requires thinner and lighter weight. In addition, since the usage places are widened due to portability, improvement in durability is...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B37/12B32B27/06B32B27/08
CPCC09K17/20G02F1/133528G02F2202/28
Inventor 武藤清河村真一
Owner SUMITOMO CHEM CO LTD
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