JP2010254979A5

JP2010254979A5 -

Info

Publication number: JP2010254979A5
Application number: JP2010077596A
Authority: JP
Filing date: 2010-03-30
Publication date: 2012-03-22
Anticipated expiration: 2030-03-30

Description

すなわち本発明は、樹脂基材の少なくとも一面に粘着剤層を有し、前記粘着剤層表面に剥離シートが設けられた粘着テープであって、平滑なステンレス（ＳＵＳ３０４）表面に２ｋｇ荷重で貼り付け、１時間静置後の３００ｍｍ/ｍｉｎにおける１８０°接着力が５〜１２Ｎ／２０ｍｍであり、前記粘着剤層における前記剥離シートの３００ｍｍ/ｍｉｎでの１８０°剥離力が３０〜８０ｍＮ／２５ｍｍであり、剥離シートを除く厚さが少なくとも５〜３０μｍである放熱シート用粘着テープを提供するものである。 That is, the present invention is an adhesive tape having an adhesive layer on at least one surface of a resin base material and having a release sheet provided on the surface of the adhesive layer, and is attached to a smooth stainless steel (SUS304) surface with a load of 2 kg. 180 ° adhesive strength at 300 mm / min after standing for 1 hour is 5 to 12 N / 20 mm, and 180 ° peeling force at 300 mm / min of the release sheet in the pressure-sensitive adhesive layer is 30 to 80 mN / 25 mm. There is provided a pressure-sensitive adhesive tape for a heat radiation sheet having a thickness excluding a release sheet of at least 5 to 30 μm.

本発明の放熱シート用粘着テープは、平滑なステンレス（ＳＵＳ３０４）表面に２ｋｇ荷重で貼り付け、１時間静置した後に３００ｍｍ／ｍｉｎの速度で１８０゜方向に剥離した際の接着力が、５〜１２Ｎ／２０ｍｍ、好ましくは６〜１０Ｎ／２０ｍｍである。また、粘着剤層と剥離シートとの間で、剥離シートを３００ｍｍ／ｍｉｎの速度で１８０゜方向に剥離した際の剥離力が３０〜８０ｍＮ／２５ｍｍ、好ましくは４０〜６０ｍＮ／２５ｍｍである。なお、接着力及び剥離力は、いずれも接着強度を測定したものであるが、本明細書中では、両者の区別を容易とするため、接着剤層と被着体との接着強度を接着力と称し、接着剤層と剥離シートとの接着強度を剥離力と称する。
The pressure-sensitive adhesive tape for heat-dissipating sheet of the present invention has an adhesive strength of 5 to 5 when it is attached to a smooth stainless steel (SUS304) surface with a load of 2 kg and left to stand for 1 hour and then peeled in the direction of 180 ° at a speed of 300 mm / min. 12N / 20 mm, preferably 6~10N / 20 mm. Further, when the release sheet is peeled in the 180 ° direction at a rate of 300 mm / min between the pressure-sensitive adhesive layer and the release sheet, the peel force is 30 to 80 mN / 25 mm, preferably 40 to 60 mN / 25 mm. The adhesive strength and peel strength are both measured for adhesive strength. However, in this specification, the adhesive strength between the adhesive layer and the adherend is determined to facilitate the distinction between the two. The adhesive strength between the adhesive layer and the release sheet is referred to as “peeling force”.

Claims

A pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer on at least one surface of a resin base material, and a release sheet provided on the pressure-sensitive adhesive layer surface,
Adhering to a smooth stainless steel (SUS304) surface with a load of 2 kg, the 180 ° adhesive strength at 300 mm / min after standing for 1 hour is 5-12 N / 20 mm,
180 ° peeling force at 300 mm / min of the release sheet between the pressure-sensitive adhesive layer and the release sheet is 30 to 80 mN / 25 mm,
A pressure-sensitive adhesive tape for a heat-dissipating sheet, wherein the thickness excluding the release sheet is 5 to 30 μm.

The pressure-sensitive adhesive of the pressure-sensitive adhesive tape is 50% by mass or more of a (meth) acrylic acid alkyl ester monomer having an alkyl group having 4 to 14 carbon atoms, 1 to 20% by mass of a vinyl monomer containing a carboxyl group, and a hydroxyl group-containing monomer. 2. The heat-dissipating sheet according to claim 1, wherein the heat-radiating sheet comprises an acrylic copolymer prepared with an essential component of 05 to 5 mass%, and the weight average molecular weight of the pressure-sensitive adhesive in the pressure-sensitive adhesive layer is from 500 to 1,000,000. Adhesive tape.

A heat radiation sheet, wherein the heat radiation sheet adhesive tape according to claim 1 is attached to at least one surface of a graphite sheet having a thickness of 30 to 100 µm.

A portable electronic terminal device using the heat dissipation sheet according to claim 3.