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Pressure sensitive adhesive tape

A pressure-sensitive adhesive and pressure-sensitive adhesive layer technology, applied in the field of pressure-sensitive adhesive tapes, can solve the problems of improved rewinding ability, reduced adhesive strength, and practical problems of tapes

Inactive Publication Date: 2013-07-10
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In particular, in an adhesive composition system containing a crosslinking agent, when the crosslinking agent is poorly dispersed (not uniform or hardly uniform) in the system, or when the pressure-sensitive adhesive layer is formed When the drying conditions fluctuate and (unstable or almost unstable), the following problems will also occur: the rewinding capacity required to rewind the pressure-sensitive adhesive tape will increase, or the adhesive tape being rewound make a lot of noise
[0013] In addition, when a polyvalent metal salt such as a metal hydroxide is contained as a flame retardant in a plastic film used as a base material, there may occur a phenomenon that the adhesive strength of the pressure-sensitive adhesive tape may decrease with greatly reduced time
In addition, it is known that due to this phenomenon, the edges of the bonded tape may be easily peeled off, thereby causing a problem in the practicality of the tape
In this way, when polyvalent metal salts are included in the substrate, then the polyvalent metal salts may cross-link with reactive functional groups (mainly carboxyl groups) in the base polymer of the adhesive , whereby the adhesive may be cured and its bond strength may be reduced
In addition, depending on circumstances, an emulsifier may be deposited on the surface of the pressure-sensitive adhesive tape, thereby possibly further reducing the adhesive strength of the tape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0126]To 100 parts by weight of a mixture containing 70 wt.% n-butyl acrylate, 29.5 wt.% 2-ethylhexyl acrylate and 0.5 wt.% methacrylic acid, add 0.03 parts by weight of a water-soluble azo-type as a polymerization initiator Initiator (commercial product V-50 of Wako Pure Chemical Industries), emulsified with 2 parts by weight of reactive emulsifier (commercial product Aqualon BC-2020 of Daiichi Kogyo Seiyaku), and then passed at about 60° C. to polymerize by mixing Mode of emulsion polymerization Polymerization was carried out for 2 hours to obtain an emulsion of an acrylic polymer (which may be referred to as "acrylic emulsion polymer A"). In this acrylic emulsion polymer A, the emulsion particles had an average particle size of 0.128 μm.

preparation Embodiment 2

[0128] To 100 parts by weight of a mixture containing 70 wt.% n-butyl acrylate, 28.75 wt.% 2-ethylhexyl acrylate and 1.25 wt.% methacrylic acid, add 0.1 parts by weight of a water-soluble azo-type as a polymerization initiator Initiator (commercial product V-50 of Wako Pure Chemical Industries), and emulsify it with 2 parts by weight of reactive emulsifier (commercial product Aqualon BC-2020 of Daiichi Kogyo Seiyaku), and then pass through at about 60° C. to continuously drop Emulsion Polymerization in Polymerization Mode Polymerization was performed for 2 hours to obtain an emulsion of an acrylic polymer (which may be referred to as "acrylic emulsion polymer B"). In this acrylic emulsion polymer B, the emulsion particles had an average particle size of 0.141 μm. In the aqueous system (aqueous phase) to which the emulsion containing the monomer component is added dropwise, pre-add the mixture containing n-butyl acrylate, 2-ethylhexyl acrylate and methacrylic acid relative to 1...

preparation Embodiment 3

[0130] To 100 parts by weight of a mixture comprising 70 wt.% n-butyl acrylate, 28.75 wt.% 2-ethylhexyl acrylate and 1.25 wt.% methacrylic acid, add 0.005 parts by weight of a silane coupling agent (Shin-etsu Silicone commercial product KBM-503) and 0.1 parts by weight of a water-soluble azo-type initiator (commercial product V-50 of Wako Pure Chemical Industries) as a polymerization initiator, and 2 parts by weight of a reactive emulsifier (commercial product Aqualon of Daiichi Kogyo Seiyaku BC-2020) was emulsified, and then polymerized at about 60° C. for 2 hours to obtain an emulsion of an acrylic polymer (which may be referred to as “acrylic emulsion polymer C”). In this acrylic emulsion polymer C, the emulsion particles had an average particle size of 0.158 μm. In the aqueous system (aqueous phase) to which the emulsion containing the monomer component is added dropwise, pre-add the mixture containing n-butyl acrylate, 2-ethylhexyl acrylate and methacrylic acid relative t...

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Abstract

The invention relates to a pressure-sensitive adhesive tape. The pressure-sensitive adhesive tape comprises a base material and at least one pressure-sensitive adhesive layer distributed on at least one surface of the base material, wherein the base material consists of an olefin resin composition comprising polyolefin resin and metal hydroxide; and the pressure-sensitive adhesive layer consists of an emulsion-type crylic acid adhesive composition comprising acrylic emulsion with emulsion particle of 0.2 mu m or smaller on average granularity. The pressure-sensitive adhesive tape has excellent edge peeling resistance and can show proper rewinding capacity.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive tape, and more particularly, to a tape having excellent adhesion and excellent edge peel resistance and exhibiting appropriate weight even when the base material is a polyolefin base material. Winding ability of the pressure sensitive adhesive tape. Background technique [0002] Hitherto, as a pressure-sensitive adhesive tape (bundling pressure-sensitive adhesive tape) for bundling electric wires such as various electric wires and cables, a The base material is a pressure-sensitive adhesive tape of polyvinyl chloride resin (hereinafter referred to as "PVC"). However, since a pressure-sensitive adhesive tape using PVC generates toxic gas when incinerated, recently, a pressure-sensitive adhesive tape having a plastic base material free of halogen atoms such as chlorine (which may be called " Halogen-free adhesive tape"), particularly a pressure-sensitive adhesive tape having a base material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J133/00
Inventor 大河内直树石黑繁树白井稚人
Owner NITTO DENKO CORP