Non-woven fabrics, also known as non-woven fabrics, are composed of directional or random fibers. They are a new generation of environmentally friendly materials. They are moisture-proof, breathable, flexible, light in weight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, and affordable. Inexpensive and recyclable.
For example, polypropylene (pp material) pellets are used as raw materials and are produced by a continuous one-step method of high-temperature melting, spinning, laying, and hot pressing and coiling.
It is called cloth because of its appearance and certain properties.
It is made of polypropylene spun directly into a mesh and thermally bonded. The strength of the product is better than that of ordinary staple fiber products. The strength is non-directional, and the vertical and horizontal strengths are similar.
In terms of environmental protection, the raw material of most of the non-woven fabrics currently used is polypropylene, while the raw material of plastic bags is polyethylene. Although the two substances have similar names, they are quite different in chemical structure.
The chemical molecular structure of polyethylene is quite stable and extremely difficult to degrade, so it takes 300 years for plastic bags to decompose; while the chemical structure of polypropylene is not strong, the molecular chain can be easily broken, so that it can be effectively degraded, and enter the next environmental cycle in a non-toxic form, a non-woven shopping bag can be completely decomposed within 90 days.
And non-woven shopping bags can be reused more than 10 times, and the pollution to the environment after disposal is only 10% of that of plastic bags
The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose, acrylic, ethylene (HDPE), and vinyl (PVC). According to the application requirements, non-woven fabrics are divided into two categories: disposable application type and durable type.
At present, man-made fibers still dominate the production of nonwovens, and before 2007, this situation will not change significantly. 63% of the fibers used in the production of nonwovens worldwide are polypropylene, 23% polyester, 8% viscose, 2% acrylic, 1.5% polyamide and the remaining 3% are other fibers.
