Light-shielding film

一种遮光膜、无机颗粒的技术，应用在遮光膜领域，能够解决灰尘附着等问题，达到平衡优异、低光泽性优异、尺寸稳定性优异的效果

Active Publication Date: 2013-01-30
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when an insulating synthetic resin film is used, there is a problem of dust adhesion due to electrostatic charging, so the light-shielding film also requires conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Trimellitic anhydride (80 mol%), benzophenone tetracarboxylic dianhydride (12.5 mol%), 3,3',4,4'-biphenyltetracarboxylic dianhydride (7.5 mol%), o-toluidine An organic solvent-soluble polyamideimide resin synthesized from diisocyanate (100 mol%) was dissolved in N-methyl-2-pyrrolidone so that the polymer concentration was 10%.

[0106] 80% by weight of this resin, 16% by weight of hydrophobic silica (manufactured by FUJI SILYSIACHEMICAL LTD., Sylophobic505) surface-treated with silicone oil (dimethylsiloxane) with an average particle size of 3.9 μm, and an average particle size of 24 nm Carbon black (manufactured by Mitsubishi Chemical Corporation, MA 100R) was compounded at a composition ratio of 4% by weight (in terms of solid content), and 15 parts by weight of a silica dispersant (modified) was added to 100 parts by weight of silica. Acrylic block copolymer, BYK Additives & Instruments, DISPERBYK2008), carbon black dispersant of 50 parts by weight relative to 100 pa...

Embodiment 2~4

[0110] (Examples 2~4, Comparative Examples 1~5)

[0111] A light-shielding film was produced in the same manner as in Example 1 except that the contents of the polyamide-imide resin, silica, and carbon black were changed to those shown in Table 1.

[0112] Table 1 shows the properties of the obtained light-shielding film.

[0113] [Table 1]

[0114]

[0115] Examples 1 to 4 are in terms of heat resistance (Tg), dimensional stability, light-shielding properties, low gloss (gloss of A surface, B surface, and cross section), mechanical properties (strength, elongation, elastic modulus) Excellent, showing good results.

Embodiment 5

[0119]Trimellitic anhydride (80 mol%), benzophenone tetracarboxylic dianhydride (10 mol%), 3,3',4,4'-biphenyltetracarboxylic dianhydride (10 mol%), o-toluidine An organic solvent-soluble polyamideimide resin synthesized from diisocyanate (100 mol%) was dissolved in N-methyl-2-pyrrolidone so that the polymer concentration was 10%. Next, using this resin solution, a black resin composition solution was prepared in the same manner as in Example 1, and a light-shielding film was produced.

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Abstract

Provided is a light-shielding film having excellent heat resistance and dimensional stability, having high light-shielding ability and low glossiness, with little variation thereof, and that can be produced inexpensively. The light-shielding film contains a polyamide-imide resin, a black filler having an average particle size of 0.01 to 1 [mu]m, and inorganic particles having an average particle size of 0.1 to 10 [mu]m. The content of polyamide-imide resin in the light-shielding film is 55 to 91 wt%, the content of black filler is 1 to 10 wt%, and the content of inorganic particles is 8 to 35 wt%.

Description

technical field [0001] The present invention relates to a light-shielding film comprising polyamide-imide resin, black filler and inorganic particles. In more detail, it relates to a diaphragm, a shutter blade, Or light-shielding films such as diaphragms of projectors, diaphragm blades of diaphragm devices for adjusting light intensity, optical equipment components, and antireflection layers for insulating substrates. Background technique [0002] In recent years, a large number of compact cameras and digital video cameras that can be moved anywhere and used at any time have emerged on the market. Along with this, compact cameras and digital video cameras are required to be further reduced in weight, smaller in size, and higher in performance. Therefore, in order to reduce the weight, size, and performance of optical devices, especially compact cameras and digital cameras, it is necessary to reduce the weight, size, and performance of components constituting them. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00C08K3/04C08K3/36C08L79/08G03B9/00
CPCG03B9/00G02B5/003C08G73/14C08K3/04C08K3/36C08L79/08C09D179/08C08J5/18
Inventor 多田谦太久保绘美山本佑
Owner TOYOBO CO LTD
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