ADHESIVE SHEET

To provide an adhesive sheet capable of achieving high levels of adhesion to high-polarity materials, adhesion to low-polarity materials, and holding power.SOLUTION: The adhesive sheet has an adhesive agent layer containing an acrylic polymer. The acrylic polymer is a polymer of a monomer component...

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Bibliographische Detailangaben
Hauptverfasser:	TAGAMI TORU, YAMAMOTO KENICHI, SHIMOOKA KEIGO, MUSASHIJIMA YASUSHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS POLISHES USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	To provide an adhesive sheet capable of achieving high levels of adhesion to high-polarity materials, adhesion to low-polarity materials, and holding power.SOLUTION: The adhesive sheet has an adhesive agent layer containing an acrylic polymer. The acrylic polymer is a polymer of a monomer component containing n-heptyl acrylate and a carboxy-group-containing monomer. The monomer component of the acrylic polymer contains more than 3 wt.% of the carboxy-group-containing monomer. Furthermore, the gel fraction of the adhesive agent layer is less than 70%. The weight-average molecular weight of the acrylic polymer is greater than 600,000.SELECTED DRAWING: Figure 1 【課題】高極性材料に対する接着力、低極性材料に対する接着力、および、保持力を高いレベルで両立し得る粘着シートを提供する。【解決手段】アクリル系ポリマーを含む粘着剤層を有する粘着シートが提供される。前記アクリル系ポリマーは、ｎ－ヘプチルアクリレートおよびカルボキシ基含有モノマーを含むモノマー成分の重合物である。また、前記アクリル系ポリマーのモノマー成分は、前記カルボキシ基含有モノマーを３重量％よりも多く含む。さらに、前記粘着剤層のゲル分率は７０％未満である。そして、前記アクリル系ポリマーの重量平均分子量は６０万よりも大きい。【選択図】図１