Paper plastic composite valve pocket
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Paper-plastic composite bag is made of plastic and kraft paper composite, usually plastic layer using polypropylene (PP) or polyethylene (PE) as the base material of the flat wire woven fabric, kraft paper is refined composite special kraft paper, with high strength, good waterproof, beautiful appearance characteristics. Is one of the popular packaging materials, is widely used in plastic raw materials, cement, feed, chemical, fertilizer and other industries paper-plastic composite bags: also known as three-in-one composite paper bags, is a small bulk container, mainly by manpower or forklift to realize unit transportation, it is convenient to transport small bulk powder granular materials, with high strength, good waterproof, beautiful appearance, easy handling and other characteristics, is a popular and practical common packaging material.
Process description: the outside is made of refined white kraft paper or yellow kraft paper, and the inside is made of plastic woven cloth. The plastic particles PP are melted by high temperature and high pressure, and the kraft paper and plastic woven cloth are compounded together. An inner film bag can be added. The paper-plastic composite bag is equivalent to a slit-bottom open pocket. With good strength, waterproof and moisture-proof and other superior characteristics.
Valve bag, commonly known as paste bottom bag, is currently an international popular packaging bag. It is fed from the top or bottom valve port and adopts special filling equipment. After filling materials, it is packed into a cube, neatly stacked and beautiful. It belongs to environmental protection bag.
Valve pocket according to the material can be divided into: pp valve pocket, PE valve pocket, paper plastic composite valve pocket, kraft paper valve pocket and multi-layer kraft paper valve pocket. PP valve pocket is made of polypropylene woven cloth upper valve port or lower valve port, which can improve packaging efficiency compared with ordinary PP woven bags. PE valve pocket is made of polyethylene woven cloth valve port. Paper-plastic composite valve pocket is made of plastic woven bag (referred to as cloth) as the base material and compounded by casting method (cloth/film composite is two in one, cloth/film/paper composite is three in one); Kraft paper valve pocket is mainly made of kraft paper, which kraft paper is divided into imported kraft paper and domestic kraft paper two.
According to the opening, the valve pocket can be divided into: upper opening valve pocket, lower opening valve pocket, upper and lower opening valve pocket.
Application of valve bag: valve bag is mainly used for packaging edible powder, chemical powder, fertilizer, synthetic materials, explosives, food, salt, minerals and other powder or granular solid materials and flexible items. Especially suitable for export enterprises to use, can improve the product packaging grade.
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