Through independent innovation and development, Longhua has developed a POP production method without chain transfer agent removal. This method is the first to introduce POP with high quality and solid content in China. This series of POP has excellent fluidity and very low monomer residue, while adding water does not thicken. The sponge products produced by POP series have good physical properties, low sponge density difference and thin skin, which can meet the strict requirements of customers. The production technology and method has been awarded as the excellent achievement of brand innovation in Shandong Province to November 2018.