| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hardenable self-adhesive sheet which can be temporarily stuck many times in positioning and provides a strong adhesion when heated after the sticking position is determined by laminating a release paper, a thermally hardenable self-adhesive layer which exhibits a weak self-adhesiveness in the normal state and realizes a strong adhesion when heated to a certain temp. or higher, and a substrate. SOLUTION: The thermally hardenable self-adhesive layer comprises a solid plasticizer and thermoplastic resin. Ester compds. having an m.p. of about 40-130 deg.C such as diphenyl phthalate, tribenzoic glyceride, and steartic monoglyceride are examples of the plasticizer. The plasticizer is used in the form of an aq. dispersion with a particle size of 10μm or lower or in the form of microcapsules. As the thermoplastic resin, a resin having self-adhesiveness at normal temp. and a glass transition point of -20 deg.C or lower, pref. -40 deg.C or lower, is used in the form of an emulsion. Examples of the resin are a (meth) acrylic ester copolymer, an SB copolymer, and an ethylene-vinyl chloride copolymer.
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