Polypropylene coated valve bag: It is made of polypropylene woven cloth with upper valve port or lower valve port. It is the strongest product among valve bags and is used for packaging of various heavy materials. After coating or adding an inner bag, it can also be used for powder filling. Compared with ordinary PP woven bags, it can improve packaging efficiency. Its advantages are low price and highest strength.

Polypropylene coated woven square-bottom valve bag: It is based on a film-coated woven bag. The specifications and dimensions are based on customer requirements. Using hot air welding technology, it is made into a packaging bag with upper and lower seals or openings on the lower seal.

Kraft paper valve pocket: Generally, it is composed of three layers of kraft paper and a moisture-proof plastic film. Almost all the outer layer is made of imported paper, yellow or white, and the inner layer is often made of domestic yellow kraft paper. The laminated plastic film has a moisture-proof effect. In order to breathe during filling, sometimes a row of holes should be punched on the surface of the kraft paper valve pocket to increase the filling speed, otherwise the gas cannot be discharged quickly with the material entering, which will affect the filling speed. Its advantage is that it has good moisture-proof effect, can exhaust gas, and is suitable for canned powder.

Paper-plastic composite valve bag: The paper-plastic composite valve bag is made of plastic woven bag (fabric for short) as the base material and compounded by the casting method (cloth/membrane composite is two-in-one, cloth/membrane/paper composite is triple)

Polyethylene blown film valve bag: The PE valve bag is made of polyethylene woven cloth valve port. The surface can be painted with anti-skid strips to solve the problem of sliding bag. It is suitable for canned particles. Its advantage is that the transparent valve bag can achieve material visibility. High tear strength and good toughness.