Fabrics of global network 】 【 after recent years of development, polyester filament geotextile production capacity in China has obtained the development which progresses by leaps and bounds, its level of equipment, process technology, product quality in line with international standards. However, the production technology of polypropylene filament is relatively backward, especially the polypropylene filament work cloth, which is still a technology gap in China.

Good mechanical performance is difficult to achieve industrialization

It is widely believed that the physical properties of polyester are superior to that of polypropylene, and its stability, heat resistance and anti-aging are superior to that of pylon. As a matter of fact, polypropylene is determined by its structural properties. In the application of advanced equipment and technical processing, it can obtain the spinning fiber with compact structure and superior performance. Through the web, polypropylene filament geotextile acupuncture consolidation after processing, into a cloth evenness and strength are improved, various aspects are better than polyester nonwoven fabric, especially in the more than 100 g/m2 g (geotextile are mostly used in industry in more than 200 g/m2), the more obvious advantages.

In the case of using acupuncture process consolidation, polyester filament can't adequately consolidation as polypropylene filament products, and the polypropylene filament after acupuncture can form close three-dimensional structure, strength and evenness obviously better than that of polyester filament. On the other hand, although polypropylene should pass uv radiation treatment to meet the needs of long-term exposure to use, but the geotextile are generally not exposed to sunlight, air, does not require materials have high weather resistant performance, it puts forward higher requirements to its corrosion resistance, anti-aging. Polypropylene has a strong resistance to acid and alkali, which is superior to polyester, which can be used in various geological conditions and environments, such as anti-leakage and anti-corrosion treatment of landfills. At present, China's annual consumption of polypropylene is around 40,000 tons, but these products need to be imported.

According to the understanding, as early as the "75" period, the original textile industry department organized the research breakthrough. The original shenyang textile industrial nonwovens technology development center since the 1980 s, and was put into scientific research strength, bear the national ">" research project "3000 tons of polypropylene spun-bonded nonwoven production line". Later, for a variety of reasons, the project eventually ran aground and failed to achieve industrialization.

The first production line fills the gap in technology

After more than 20 years of development, the equipment and products of our country's polypropylene filament work cloth are still in a blank state. There have been many calls in the industry, but so far, little has been achieved. According to the investigation of the spinner, only a few enterprises, such as shaoxing nonwoven co., ltd. and dalian chemical fiber technology co., LTD., are actively developing and developing.

Shaoxing company is aiming at the market gap of the equipment and products of China's polypropylene filament earthwork cloth, and independently designed and manufactured a production line for the production of polypropylene filament of polypropylene fiber. The production line, which is 1.8 meters wide, is an experimental production line, and its technology and process are improving. According to the general manager of the company, the company has made some progress in the research and development of polypropylene filament work cloth and the exploration of technology through two years' efforts. At present, the spinning position has been extended from 1 to 6, the most difficult technical link to conquer -- the mixed drafting of polypropylene fiber bundle, reciprocating spreading network and so on have made an important breakthrough.

It is understood that there is a fenced area in front of the production workshop of the production workshop, which is the general manager's field office. Sometimes he would sit in front of the production line, drawing the drawings and designing the drawings to guide the employees to revise the plan. It is understood that the company has many innovative technologies in the production line and product development of polypropylene filament work cloth. For example, in the cooling aspect of the silk beam, it has been repeatedly tested dozens of times, such as ice cooling, cold storage of cold storage device, spraying and circulating air cooling, etc. The method of spraying, spraying water, electronic wind bar, hot rolling and antistatic mother are also used.

Industry insiders say that the development of the production line of domestic polypropylene earth cloth is to fill the domestic gap and end the history of China's single polyester geotextile to find new economic growth points. On the basis of the current 1.8-metre line, we can enlarge the production line of 6 meters and finally realize industrialization.

In fact, there is still a long way to go to really break the technical difficulties of the polypropylene filament. Polypropylene filament yarn processing technology, equipment manufacture and so on many places differs from that of polyester filament, many are technical barriers, and this is why the polypropylene filament geotextile can't make a breakthrough so quickly. But polypropylene has good monofilament strength, good hot melt adhesive properties, and the proportion is low, the same g polypropylene about 45% more than the polyester fiber root number, can save material, reduce the cost, therefore, polypropylene geotextile developing power and the market price advantage is very obvious.

Our country has a lot of demand for polypropylene in the fields of highway, railway roadbed laying, dike reinforcement, and harmful object filling, and the market has a lot of room for development. It is an urgent and important task to realize the domestication and industrialization of polypropylene filament work cloth as soon as possible. Fortunately, we have already seen the dawn, and the dream of the silk spinning of the polypropylene filament is not far away.