Propylene filament geotextile industrialization dawn fill technical blank
Number of hits：1072018-11-01 00:00:00
Excellent mechanical performance but difficult to achieve industrialization
It is generally believed in the industry that polyester has better physical properties than polypropylene, and its stability, heat resistance, and anti-aging properties are better than polypropylene. In fact, polypropylene is determined by its structural performance. Under the condition of using advanced equipment and technology to process, it can be obtained by multiple traction and extension. Spindle fibers with tight structure and superior performance can be obtained. By laying the net and acupuncture, the polypropylene filament geotextile processed after cementing was improved in uniformity and strength, and the indicators in all aspects were better than that of polyester geotextile. Especially when the weight of 100g/m2 is above(most industrial geotextiles are above 200g/m2), the advantage is even more obvious.
In the case of the use of acupuncture technology, polyester filament can not be fully cemented like a polypropylene filament product, and polypropylene filament can form a tight three-dimensional structure after acupuncture, and its strength and uniformity are significantly better than polyester filament. On the other hand, although polypropylene is subjected to ultraviolet treatment to meet the requirements for long-term exposure, geotextiles are generally not exposed to sunlight and air, and do not require that materials have too high sun resistance, but instead have corrosion resistance., anti-aging puts forward higher requirements. Polypropylene has strong acid-base properties, which are superior to polyester. It can be used in various Geological conditions and environments, such as anti-leakage and anti-corrosion treatment of garbage landfills. At present, China consumes about 40,000 tons of acrylic geotextile every year, but these products need to be imported.
It is understood that as early as the "7th Five-Year Plan" period, the former Ministry of Textile Industry organized scientific research. The former Shenyang Textile Industry Non-Weaving Technology Development Center has been investing in scientific research since the 1980s and has undertaken the research and development of the National "7th Five-Year Plan" project "3000 tons of Pylon Spinning and Adhesion Non-Weaving Production Line". Later, due to various reasons, this project eventually ran aground and did not realize industrial production.
The first domestic production line to fill technical gaps
After more than 20 years of development, the equipment and products of polypropylene filament geotextile are still blank. There have also been a lot of calls in the industry, but so far there has been little success. According to the investigation of the Spinning and Adhesion Branch, at present, only a few enterprises such as Shaoxing Non-Spinning Fabric Co., Ltd. and Dalian Chemical Fiber Technology Co., Ltd. are actively developing.
A company in shaoxing aims at the blank market of equipment and products of pylon filament geotextile in China, and has independently designed and manufactured a domestic production line of pylon filament geotextile. The production line is 1.8 meters wide and is a production line in the pilot stage. Its technology and process are constantly being improved. According to the general manager of the company, through two years of efforts, the company has made certain progress in the research and development of polypropylene filament geotextile and the exploration of the process. At present, the spinning position has been expanded from 1 to 6, and the most difficult technical link to overcome has made important breakthroughs in the mixing and stretching of polypropylene wire bundles and reciprocating networks.
It is understood that there is a fenced area in front of the production line of polypropylene filament geotextile in the production workshop. That is the on-site office of the general manager of the company. Sometimes, he sat in front of the production line, drawing drawings while the design, on the spot to guide the staff to revise the plan. It is understood that the company has many innovative technologies in the production line and product development of polypropylene filament geotextile. For example, in the cooling of silk bundles, ice cubes were used to refrigerate, table coolers were cooled, and spray and circulation cooling were used to repeatedly test dozens of times. Another example is to solve the problem of wire winding rolls, and has adopted spray, water spray, electronic wind rods, hot rolling, and anti-static parent particles.
Industry insiders said that the purpose of the domestic production line of polypropylene earth cloth is to fill the domestic gap, end the history of China's single polyester earth cloth, looking for new economic growth points. On the basis of the current 1.8 meter line, it will be enlarged to a 6-meter production line and eventually industrialized.
In fact, there is still a long way to go to break the technical difficulties of polypropylene filament geotextile. Polypropylene filament processing technology, equipment manufacturing and many other places are different from polyester filament, many aspects of the existence of technical barriers, which is why the polypropylene filament geotextile can not make a breakthrough so soon. However, polypropylene has better single wire strength, good thermal bonding, and low specific gravity. The same gram of polypropylene has 45 % more fiber radicals than polyester, which can save raw materials and reduce costs. Therefore, Propylene geotextile development stamina and market performance advantage is very obvious.
Our country has a lot of demand in the fields of highway, railway roadbed laying, Dyke reinforcement, harmful object landfill, etc.. As soon as possible, it is an urgent and important task to realize the localization and industrialization of polypropylene filament geotextile. Happily, we have seen the dawn, away from the nylon silk thread thread thread needle stinging earth cloth industrialization dream is not far away.