In the history of the development of human civilization, the birth of a major new material means a revolution in productivity. Take a look at the five to sixty years since the advent of new non-woven materials, how huge and far-reaching the impact it has on human daily life and applications related to "Going into the Earth"!
raw material
Non-woven fabric, also known as non-woven fabric, is composed of oriented or random fibers to form a web structure, which is then reinforced by mechanical, thermal bonding or chemical methods. The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, polyethylene fiber (HDPE), and chlorine fiber (PVC).
advantage
Lightweight, with polypropylene resin as the main raw material, the specific gravity is only 0.9, which is only three-fifths of cotton. It is fluffy and feels good.
It is soft, composed of fine fibers (2-3D) and formed by hot-melt bonding with light spots. The finished product is moderately soft and comfortable
Water repellent, breathable, polypropylene slices do not absorb water, have zero moisture content, and have good water repellency. It is composed of 100% fiber and has good air permeability. It is easy to keep the cloth dry and easy to wash.
Non-toxic, non-irritating, the product is produced with FDA food-grade raw materials, does not contain other chemical ingredients, has stable performance, is non-toxic, no peculiar smell, and does not irritate the skin.
Antibacterial and anti-chemical agents, polypropylene is a chemically blunt substance, not moth-eaten, and can isolate the corrosion of bacteria and insects in the liquid; antibacterial, alkali corrosion, and the strength of the finished product will not be affected by erosion.
Good physical properties, it is made of polypropylene spun yarn directly laid into a net and thermally bonded. The product strength is better than ordinary staple fiber products, the strength is non-directional, and the vertical and horizontal strengths are similar.
Environmental protection. In terms of environmental protection, the raw material of most non-woven fabrics used is polypropylene, while the raw material of plastic bags is polyethylene. Although the names of the two substances are similar, their chemical structures are far apart. The chemical molecular structure of polyethylene is very stable and extremely difficult to degrade, so it takes 300 years for plastic bags to be completely decomposed.
The chemical structure of polypropylene is not strong, and the molecular chain can be easily broken, which can be effectively degraded and enter the next environmental cycle in a non-toxic form. A non-woven shopping bag can be completely decomposed in 90 days. Moreover, the non-woven shopping bag can be reused more than 10 times, and the pollution degree to the environment after being discarded is only 10% of that of the plastic bag.
Disadvantage
Compared with woven fabrics, it has poor strength and durability and cannot be cleaned like other fabrics. The fibers are arranged in a certain direction, so it is easy to split from the right angle direction and so on. Therefore, the improvement of the production method mainly focuses on the improvement of preventing splitting.
In summary, non-woven fabrics have more than shortcomings, and the rise and popularity of non-woven fabrics are the general trend.
