ADHESIVE SHEET AND LAMINATE

To provide an adhesive sheet having both of UV cuttability (UV absorbency) and UV curability, wherein the adhesive sheet achieves both of reduced coloration and step followability.SOLUTION: An adhesive sheet includes a heat-dried adhesive composition containing a (meth)acrylic copolymer, a solvent,...

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Bibliographische Detailangaben
Hauptverfasser:	KURODA DAISUKE, ASAO MACHI, SEGUCHI SEIJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS PERFORMING OPERATIONS POLISHES TRANSPORTING USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	To provide an adhesive sheet having both of UV cuttability (UV absorbency) and UV curability, wherein the adhesive sheet achieves both of reduced coloration and step followability.SOLUTION: An adhesive sheet includes a heat-dried adhesive composition containing a (meth)acrylic copolymer, a solvent, a photopolymerization initiator and a UV absorber and is substantially free from a heat crosslinker. The photopolymerization initiator has an extinction coefficient of less than 10 mL/(g cm) at wavelength 405 nm. The adhesive sheet has a gel fraction of 5% or less, and also has active energy-ray curability.SELECTED DRAWING: Figure 1 【課題】本発明は、紫外線カット性（紫外線吸収性）及び紫外線硬化性を兼ね備える粘着シートにおいて、着色の抑制と段差追従性が両立した粘着シートを提供することを課題とする。【解決手段】本発明は、（メタ）アクリル系共重合体、溶剤、光重合開始剤及び紫外線吸収剤を含有し、実質的に熱架橋剤を含まない粘着剤組成物を熱乾燥することにより得られる粘着シートであって、光重合開始剤の波長４０５ｎｍの吸光係数は１０ｍＬ／（ｇ・ｃｍ）未満であり、粘着シートのゲル分率は５％以下であり、かつ活性エネルギー線硬化能を有する、粘着シート【選択図】図１