... , hose, leather shoes, blow molding product, appliance insulation material.. 1. SG-3: Films, raincoat, industry packing, artificial leather, hose and shoe ... -making material, etc.2. SG-5: Rigid plate, gramophone record, value and welding rod, PVC ... pipes, PVC windows, doors ,etc.3. SG-7: Good hardness and high strength, mainly used for hard ...