... as a warp dressing agent, textile finishing agent and the raw material of vinylon; b.construction :upholstery ... used as an additive of cement and mortar, inner and outer wall paints, and moulding board binder. c.chemical industry ... used as a soil improving agent, pesticide reinforcing agent and PVOH thin film f. used as a well- ... , medicine, printing, ceramics, steel-making, electronics and plating.