Three paper membrane valve pocket dry powder the Building Materials valve pockets tile adhesive square bottom bags Valve sheet multi-layer kraft paper bags stone binder bags of dry mortar bags kraft paper bag square bottom valve bag vitrified tile adhesive kraft paper bags , caulk packaging bags, valve bags of putty powder the surface mortar Packaging paper bag, exterior insulation mortar bags, cracking mortar bags, valve bags of adhesive mortar, tile cement bags, self-leveling cement valve bag, dry powder interface agent / waterproof coating paper bag, sealant valve pockets, seams powder kraft paper bag, sliding walls powder, talcum powder, zirconium silicate multilayer valve port Valve sheet of paper bag dry mortar: the end of the valve pockets: commonly known as: Bottomer bag material for three paper film or multilayer paper bag, mainly used for dry mortar, chemical raw materials, pigments, food additives powder bags for the birth of an efficient packaging, to facilitate the transport of ideas guidelines. The overall appearance of the bag is square, very suitable for stacking and transportation; the bottom of the valve port, to facilitate the filling material, and the seal is simple. The new environmentally friendly packaging, suitable for canning equipment can be divided into: paper-plastic composite valve pocket or multi-layer paper valve bags. In order to easy filling, punch holes in the bag body, to facilitate the gas exhaust and prevent the burst bag filling. The middle of the paper can add a layer of plastic film for packaging moisture-proof products.