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Pressure-sensitive adhesive tape

A technology of pressure-sensitive adhesives and tapes, applied in the directions of adhesives, film/sheet-like adhesives, optics, etc., can solve the problems of increasing the total thickness of pressure-sensitive adhesive tapes

Inactive Publication Date: 2004-03-03
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to problems in that the total thickness of the pressure-sensitive adhesive tape increases, and that the thickness of portable phones and the like cannot be made to correspond to the reduction in weight

Method used

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  • Pressure-sensitive adhesive tape
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  • Pressure-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] By printing on one side of a white base film (polyethylene terephthalate; chromaticity L: 92) with a thickness of 38 microns, three colored layers, the white layer (chromaticity L: 92), are formed in this order. ), a silver layer (chroma L: 75) and a black layer (chroma L: 25). This film was used as a substrate. The ink used for printing the colored layer was NB-500 manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd. Each colored layer was formed with a thickness of 1 micron. A clear acrylic pressure sensitive adhesive was applied to each side of the substrate and dried to form a pressure sensitive adhesive layer having a thickness of 20 microns. A double-sided pressure-sensitive adhesive tape was thus obtained.

Embodiment 2

[0062] By printing on one side of a white base film (polyethylene terephthalate; chroma L: 92) with a thickness of 38 microns, three colored layers, namely silver layers (chroma L: 92) are formed in this order. ), black layer (chroma L: 25) and black layer (chroma L: 25). This film was used as a substrate. The ink used for printing the colored layer was NB-500 manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd. Each colored layer was formed with a thickness of 1 micron. A clear acrylic pressure sensitive adhesive was applied to each side of the substrate and dried to form a pressure sensitive adhesive layer having a thickness of 20 microns. A double-sided pressure-sensitive adhesive tape was thus obtained.

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PUM

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Abstract

A pressure-sensitive adhesive tape contains a substrate and a pressure-sensitive adhesive layer disposed on at least one side of the substrate, wherein the substrate contains colored layers containing a white layer, a layer of a color other than white and black, and a black layer which are superposed in this order.

Description

field of invention [0001] This invention relates to pressure sensitive adhesive tapes. The pressure-sensitive adhesive tape of the present invention functions to reflect light and shield light having a specific wavelength. In the manufacture of liquid crystal displays (LCDs) of the internal / external dual lighting type used in fields such as portable phones and PDAs, pressure-sensitive adhesive tapes can be used to attach liquid crystal display model components to (module unit) is fixed to the backlight component. Background of the invention [0002] LCDs of the interior / exterior light type used in portable telephones, etc., consist of a liquid crystal display model assembly and a rear projection assembly, which are fixed to each other with pressure-sensitive adhesive tapes such as Figure 6 shown. Such pressure-sensitive adhesive tapes are required to have properties of reflecting and blocking light having specific wavelengths. The light reflection performance must be abl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333C09J7/29C09J201/00
CPCC09J2201/162C09J7/0296Y10T428/28Y10T428/2848C09J7/29C09J2301/162
Inventor 宫野亚纪子横山纯二副田义和
Owner NITTO DENKO CORP
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