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Baseless double-sided adhesive sheet or tape, and method for manufacturing the same

A double-sided adhesive, no substrate technology, applied in the field of double-sided adhesive sheets, double-sided adhesive sheets or tapes, can solve the problems of reducing initial adhesion, reducing adhesive strength, low viscosity, etc. The effect of reducing burden on raw materials, reducing stress, and relieving stress

Active Publication Date: 2017-12-01
KYODO GIKEN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This inevitably leads to a low-tack product with the sacrifice of the desired initial bond strength
[0017] In general, if the polymeric molecular weight of the binder is increased from 800,000 to 2,000,000, the binder shows high film-forming properties, but has reduced initial adhesion
Similarly, if the adhesive is highly cross-linked, OH functional groups etc. are blocked, lowering the exhibited adhesive strength so that predetermined characteristics cannot be obtained
[0018] As mentioned above, in the known double-sided adhesive tape using the base material, the properties of the adhesive are determined by the properties of the base material to prevent the sticking of the release paper and inhibit the flow of the adhesive layer so that the adhesion cannot be fully exerted. performance
However, in conventional double-sided adhesive tapes without substrates, it is necessary to impart a high molecular weight (hardness) to the adhesive layer and to increase cohesive force in order to prevent the sticking of the release paper, which leads to the problem of inevitably producing low-tack products

Method used

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  • Baseless double-sided adhesive sheet or tape, and method for manufacturing the same
  • Baseless double-sided adhesive sheet or tape, and method for manufacturing the same
  • Baseless double-sided adhesive sheet or tape, and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118]Example 1: Formation of a three-layer film by UV curing reaction

[0119] By dissolving 10 wt % of added hydrogenated terpene phenol (manufactured by Yasuhara Chemical Co., Ltd., YS Polyster UH) as a tackifier in a polymer such as 2-ethylhexyl acrylate, butyl acrylate, etc. The acrylic syrup composition was prepared in 100% by weight of acrylic syrup (slurry manufactured by Soken Chemical & Engineering Co., Ltd.; trade name WS) as a primary polymerized prepolymer obtained in a monomer such as base or acrylic acid, thereby Adhesive layers 3 and 4 were prepared for use as front and back layers.

[0120] 0.7 wt % of PET short fibers having a fiber diameter of 5 denier and a fiber length of 5 mm were added to 100 wt % of the acrylic size composition and dispersed using a stirrer.

[0121] In addition, 0.5wt% of an acetophenone-based photopolymerization initiator (manufactured by Ciba Specialty Chemicals; trade name IRGACURE 184) was added to 100wt% of the acrylic paste comp...

Embodiment 2

[0130] Example 2: Solvated Layer 2 Formation, Fiber Insertion in Layer 2

[0131] like figure 2 As shown, Example 2 is a manufacturing method in which a structure is provided by preparing an adhesive layer 3 provided on a release paper 10 in which fibers 5 are dispersed and an adhesive layer 3 provided on a release paper 10 in which fibers 5 are dispersed. Structure of adhesive layer 12 of fiber 5; preparation having adhesive layer 4 with fiber 5 dispersed therein provided on release paper 11 and adhesive with fiber 5 dispersed therein provided on adhesive layer 4 The structure of the layer 14; and the compatibility layer (adhesive layer) 2 is provided by polymerizing the adhesive layer 14 with the adhesive layer 12.

[0132] Adhesive layers 3, 4, 12, and 14 used a solvated acrylic composition (manufactured by Ipposha Oil Industries Co., Ltd., trade name 520) as an adhesive by applying a solution polymerization method such as 2-ethylhexyl acrylate. , butyl acrylate or acryl...

Embodiment 3

[0137] Example 3: Solvated layer 2 formation with fibers inserted into layer 1

[0138] like image 3 As shown, Example 3 is a manufacturing method in which a structure is provided by preparing an adhesive having an adhesive layer 3 disposed on a release paper 10 and an adhesive having fibers 5 dispersed therein disposed on the adhesive layer 3 The structure of the layer 12; prepare the structure with the adhesive layer 4 disposed on the release paper 11 and the adhesive layer 14 disposed on the adhesive layer 4 in which the fibers 5 are dispersed; and by making the adhesive layer 14 is polymerized with adhesive layer 12 to provide a compatible layer (adhesive layer) 2 .

[0139] Adhesive layers 3, 4, 12, and 14 used a solvated acrylic composition (manufactured by Ipposha Oil Industries Co., Ltd., trade name 520) as an adhesive by applying a solution polymerization method such as 2-ethylhexyl acrylate. , butyl acrylate or acrylic acid and other monomers obtained from the pri...

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Abstract

The invention provides a baseless double-sided adhesive sheet or tape configured to prevent seepage of an adhesive during a storage period or during cutting into a predetermined dimension, represent an expected performance of anti-peeling cohesion, and avoids sacrifice of an initial bonding intensity, and a method for manufacturing the same. In the baseless double-sided adhesive sheet or tape, an adhesive layer formed from an adhesive serves as a center layer, and adhesive layers and formed from an adhesive are layered onto a front face and a rear face of the adhesive layer serving as the center layer. Fibers are least dispersed in the adhesive layer serving as the center layer, and the adhesive layer serving as the center layer between the adjacent adhesive layers has a relatively high fiber density and relatively low flowability.

Description

technical field [0001] The present invention relates to a double-sided adhesive sheet without a substrate. The present invention relates to a substrate-less double-sided adhesive sheet or tape capable of obtaining a predetermined adhesive strength in addition to having a stable shape and thinness, which is suitable for: adhesion to films, paper, printed matter, etc. ; Lamination of circuit boards and fixing of reinforcing plates; Joining automotive interior molding materials, etc. The invention also relates to a method for its manufacture. [0002] Note that the term "sheet" in this application is used in a sense including "film". Background technique [0003] Hitherto, for an adhesive tape having an adhesive layer formed by applying an adhesive to a base material, there has been proposed an adhesive tape (for example, Japanese Patent No. 4739766 and Japanese Utility Model Application Publication No. H07-40756 ), wherein the adhesive layer is physically hardened and fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J133/00C09J175/04C09J11/08B32B7/02C09J7/10
CPCC09J7/00C09J11/08C09J133/00C09J175/04C08L2205/16C09J2429/00C09J2433/00C09J2467/00C09J2475/00C09J2477/00B32B7/02C08L67/02C08L29/14C08L77/00B32B37/153B32B2037/268B32B2310/0831B32B27/08B32B27/10B32B27/16B32B27/20B32B27/36B32B29/06B32B2250/05B32B2255/12B32B2255/26B32B2262/0223B32B2262/0253B32B2262/0269B32B2262/0284B32B2262/04B32B2307/50B32B2307/732B32B2307/734B29C48/08B29C48/154B29C48/21B29C48/23B32B7/12B32B27/308B32B27/40B32B37/12B32B2309/105B32B2405/00C09J11/00C09J2301/124C09J2301/208C09J7/10B32B37/15
Inventor 浜野尚渡边文子
Owner KYODO GIKEN CHEM
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