MANUFACTURING METHOD OF SHEET CUSHION FOR VEHICLE

• Main Authors: KANEKO TAKAFUMI, SAKAKIBARA HIROKAZU, MIYATA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a manufacturing method capable of setting a temperature of a mold at low equal to that in a cold cure method and saving weight of a sheet cushion for vehicle.SOLUTION: There is provided a manufacturing method of a sheet cushion using a propylene oxide added polyether polyol having ratio of a primary hydroxyl group contained in terminal hydroxyl groups of 50 to 80% of 25 to 100 pts.wt. and using a silicone foam stabilizer containing no metal catalyst and having kinetic viscosity at 25°C of 400 mm/s or more for an urethane foam raw material for a side part of the sheet cushion for vehicle, and using polyether polyol having hydroxyl group value of 20 to 50 mg/KOHg and polymer polyol having hydroxyl group value of 20 to 50 mg/KOHg and using a silicone foam stabilizer containing no metal catalyst and having kinetic viscosity at 25°C of 10 to 300 mm/s for an urethane foam raw material for a main part of the sheet cushion for vehicle.SELECTED DRAWING: None 【課題】金型の温度をコールドキュア法並みの低い温度にでき、かつ車両用シートクッションの軽量化が可能な製造方法の提供する。【解決手段】車両用シートクッションのサイド部用ウレタンフォーム原料は、末端水酸基に含まれる第１級水酸基の比率が５０〜８０％であるプロピレンオキサイド付加ポリエーテルポリオールを２５〜１００重量部使用し、金属触媒を含まず、２５℃における動粘度が４００ｍｍ２／ｓ以上であるシリコーン整泡剤を使用し、車両用シートクッションのメイン部用ウレタンフォーム原料は、水酸基価２０〜５０ｍｇ／ＫＯＨｇのポリエーテルポリオールと、水酸基価２０〜５０ｍｇ／ＫＯＨｇのポリマーポリオールを使用し、金属触媒を含まず、２５℃における動粘度が１０〜３００ｍｍ２／ｓ以上であるシリコーン整泡剤を使用するシートクッションの製造方法。【選択図】なし