Pressure-sensitive adhesive tape

A pressure-sensitive adhesive and adhesive tape technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc. The effect of improving visibility and suppressing peeling

CN113755108APending Publication Date: 2021-12-07NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-12-07

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Abstract

A double-sided pressure-sensitive adhesive tape 1 includes a nonwoven fabric carrier 2 and a first pressure-sensitive adhesive layer 3 disposed on one side of the nonwoven fabric carrier 2 in a thickness direction. A colorant is contained in the nonwoven fabric carrier 2, and is not contained in the first pressure-sensitive adhesive layer 3. Then, a basis weight of the nonwoven fabric carrier 2 is adjusted to be 10 g / m<2> or more and 30 g / m<2> or less, and a thickness of the nonwoven fabric carrier 2 is adjusted to be 20 (mu)m or more and 50 (mu)m or less.
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Description

technical field

[0001] The present invention relates to pressure sensitive adhesive tapes. Background technique

[0002] In various industrial fields, pressure-sensitive adhesive tapes are used to fix an object to an adherend. For example, in the manufacture of various industrial products such as automobiles, a plurality of objects are adhered to adherends using a plurality of pressure-sensitive adhesive tapes. However, when the pressure-sensitive adhesive tape is left unattached, the object may come off from the adherend, and the reliability of the product may decrease. Therefore, it is desired to improve the visibility of the pressure-sensitive adhesive tape.

[0003] As such a pressure-sensitive adhesive tape, for example, a pressure-sensitive adhesive sheet including a nonwoven fabric and an adhesive layer disposed on the nonwoven fabric, the adhesive layer containing a colorant has been proposed (for example, see Patent Document 1. ).

[0004] prior art literature ...

Examples

Embodiment 1～5 and comparative example 1～4

[0145] 60 parts by mass of distilled water and 0.1 part by mass of an emulsifier (sodium polyoxyethylene alkyl ether sulfate, trade name: LATEMUL E-118B, manufactured by Kao Corporation) were placed in the reaction container. The reaction container is equipped with a container main body, a stirrer, a thermometer, a reflux condenser, a dropping device, and a nitrogen gas introduction tube.

[0146] Then, the polymerization initiator (2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine]hydrate, trade name: VA-057, Wako Pure Chemical Industries, Ltd. Kogyo Co., Ltd.) 0.1 parts by mass.

[0147] In addition, 85 parts by mass of 2-ethylhexyl acrylate, 13 parts by mass of methyl acrylate, 1.5 parts by mass of acrylic acid, 0.5 parts by mass of methacrylic acid, 3-methacryloxypropyltrimethoxysilane (trade name : KBM-503 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.02 parts by mass, 0.033 parts by mass of a chain transfer agent (dodecyl mercaptan), 1.9 parts by mass of the abov...