_PUR hot melt adhesive,Edge sealing hot melt adhesive,PU polyurethane adhesive,PVC adhesive,Splicing glue,Fireproof adhesive,High temperature edge sealing adhesive,Medium temperature edge sealing adhesive,Hot melt adhesive for books,APAO hot melt adhesive,EVA hot melt adhesive,Guangzhou Guyu Dexin Materials Co., Ltd