Adhesive sheet

一种粘合片、粘合性的技术，应用在粘合剂类型、酯共聚物粘合剂、胶粘剂等方向，能够解决空气残留、难以粘合片粘贴、鼓泡等问题，达到耐起泡性及粘合特性良好、优异除气性的效果

Active Publication Date: 2016-11-23
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for example, for a PSA sheet with a large sticking area used for identification / decoration, paint shielding, and surface protection of metal plates, etc., when sticking to an adherend, there is a gap between the PSA layer and the PSA sheet. Air tends to remain between the adherends, and "bubbles" are formed in this part, making it difficult to attach the PSA sheet to the adherends well.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0406] The present invention will be specifically described by the following examples, but the present invention is not limited to the following examples. In addition, the physical property value in the following manufacture example and an Example is the value measured by the following method.

[0407]

[0408] It is a value measured under the following conditions using a gel permeation chromatography device (manufactured by Tosoh Corporation, product name "HLC-8020") and converted to standard polystyrene.

[0409] (measurement conditions)

[0410] ・Column: A column in which "TSK guard column HXL-L", "TSK gel G2500HXL", "TSK gelG2000HXL" and "TSK gel G1000HXL" (all manufactured by Tosoh Corporation) are sequentially connected

[0411] ·Column temperature: 40℃

[0412] Elution solvent: tetrahydrofuran

[0413] ·Flow rate: 1.0mL / min

[0414]

[0415] The volume average secondary particle diameter of the silica particles was obtained by measuring the particle size distrib...

manufacture example x-1～6

[0419] (Preparation of solutions (x-1) to (x-6) of the resin composition)

[0420] To 100 parts by mass of an acrylic resin solution of the type and solid content described in Table 1, a crosslinking agent and a diluent solvent of the type and compounding amount described in Table 1 were added, and the solid content concentrations listed in Table 1 were respectively prepared. Solutions (x-1) to (x-6) of the resin composition.

[0421] In addition, the detail of each component described in Table 1 used for preparation of the solution (x-1)-(x-6) of a resin composition is as follows.

[0422]

[0423] · Solution (i): containing acrylic resin (x-i) (acrylic copolymer having structural units derived from butyl acrylate (BA) and acrylic acid (AA), BA / AA=90 / 10 (mass %), Mw : 470,000) and a mixed solution of toluene and ethyl acetate having a solid content concentration of 33.6% by mass.

[0424] Solution (ii): containing acrylic resin (x-ii) (having a structure derived from buty...

manufacture example y-0

[0435] (Preparation of microparticle dispersion (y-0))

[0436] To a solution (i) containing an acrylic resin (x-i) (containing an acrylic copolymer having structural units derived from butyl acrylate (BA) and acrylic acid (AA) (BA / AA=90 / 10 (mass %), Mw: 470,000) and a solid content concentration of 33.6% by mass of a mixed solution of toluene and ethyl acetate) 100 parts by mass (solid content: 33.6 parts by mass) were added as fine particles of silica particles (product name "Nipsil E- 200A", manufactured by TOSOH SILICA, volume average secondary particle diameter: 3 μm) 50.4 parts by mass (solid content: 50.4 parts by mass), and adding toluene to disperse the fine particles, prepared a solid containing acrylic resin and silica particles A fine particle dispersion (y-0) having a component concentration of 30% by mass.

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Abstract

Provided is an adhesive sheet having, on a base member or release member, a resin layer containing a resin component (X), which contains resin as the primary component, and a particle component (Y), which comprises microparticles, at least the surface ([Alpha]) of the resin layer at the reverse side from the side to which the base member or release member is provided having adhesive properties, wherein a plurality of concavities having a maximum height difference of at least 0.5 [Mu]m are present within a predetermined region (P) on the surface ([Alpha]), at least 95% of the plurality of concavities present within the region (P) have shapes that differ from each other, and at least one concavity is present within a predetermined region (Q) on the surface ([Alpha]). The adhesive sheet has favorable blistering resistance and adhesive properties, and has superior air passage properties such that collections of air that can arise when the adhesive sheet is pasted to an adhesion subject can be easily eliminated.

Description

technical field [0001] The present invention relates to an adhesive sheet. Background technique [0002] A common adhesive sheet is composed of a base material, an adhesive layer formed on the base material, and a release material provided on the adhesive layer if necessary. When used, when a release material is provided, After peeling off this release material, the adhesive layer is brought into contact with an adherend and stuck. [0003] However, for example, for a PSA sheet with a large sticking area used for identification / decoration, paint shielding, and surface protection of metal plates, etc., when sticking to an adherend, there is a gap between the PSA layer and the PSA sheet. Air tends to remain between the adherends, and "bubbles" are formed in this part, making it difficult to adhere the PSA sheet to the adherends satisfactorily. [0004] In order to solve such a problem, for example, Patent Document 1 discloses that a release material having a fine embossed pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J11/04C09J11/06C09J133/00C09J7/38
CPCC09J11/04C09J133/08C08K3/22C08K3/36C09J2433/00C09J7/385C09J7/38C09J2301/204C09J2301/408C08F220/1804C08F220/06C09J2301/302
Inventor 加藤挥一郎上村和惠网野由美子斋藤慈
Owner LINTEC CORP
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