What are the classifications of non woven bags?
1. The main material of non-woven bag is non-woven fabric. Non woven bag is a new type of fiber product that directly uses polymer chips, short fibers or filaments to form a soft, air-permeable and flat structure through various web-forming methods and consolidation techniques.
Advantages: non woven bag is good in quality and low in price, environmentally friendly and practical, versatile, and prominent advertising space. Suitable for various business activities and exhibitions. It is an ideal advertising promotion gift for enterprises and institutions.
2. The raw material of non woven bag is polypropylene, and the raw material of plastic bag is polyethylene. Although the names of these two substances are similar, their chemical structures are quite different. The chemical molecular structure of polyethylene is very stable and extremely difficult to decompose, so plastic bags can be decomposed in a few years; while the chemical structure of polypropylene is not strong, the molecular chain is easy to break, and it can be effectively degraded. And enter the next environmental cycle in a non-toxic form, a non-woven bag can be completely decomposed within 90 days.
According to different production processes, it can be divided into:
1. Heat-sealing non woven bag: refers to adding fibrous or powdery hot melt adhesive reinforcement material to the fiber web, and then heating, melting, cooling the fiber web and strengthening it into a cloth.
2. Spunbond non woven bag: After the polymer is extruded and stretched to form continuous filaments, the filaments are spread into a net shape, and then the fiber net is self-bonded, thermally bonded, and chemically bonded. A combination or mechanical reinforcement method of making a fiber web into a non-woven fabric.
3. Melt-blown non-woven bag: its technological process: polymer feeding-melt extrusion-fiber forming-fiber cooling-netting-reinforcement into cloth.
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