ADHESIVE COMPOSITION FOR FPCB, ADHESIVE SHEET USING THE SAME AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: An adhesive composition for flexible circuit boards is provided to maintain long-term storage with acrylic adhesive under a quick press condition, to have excellent adhesion with flexible circuit board, and to improve weldability. CONSTITUTION: An adhesive composition for flexible circuit board comprises 4-450 parts by weight of an epoxy hardening agent and phenol hardening agent; and 5-100.0 parts by weight of a thermoplastic resin; and 100.0 parts by weight of polyurethane urea resin with an acid voalue of 5-50 mg KOH/g, which is obtained by a reaction of a urethane-based prepolymer with an isocyanate-terminated group and an amine group. An adhesive sheet(1) for attaching a flexible circuit board-reinforcing board consists of a first releasing sheet(12); an adhesive layer(11) spread on the first releasing sheet; and a second releasing sheet(12') laminated on the adhesive layer.