OPENING PART PACKING MATERIAL HAVING CORNER PARTS, METHOD FOR MANUFACTURING THE SAME, AND OPENING PART STRUCTURE USING PACKING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a packing material formed into a square frame shape to have square corner parts, having square attaching flanges and ensuring high airtightness. SOLUTION: The packing material is adapted to a rectangular opening part and each of the straight line parts thereof comprises an extrusion molded article and each of the corner parts 2 thereof comprises an injection molded article P2. At the time of molding of the injection molded articles P2, both parts are bonded under heating and pressure.