2013 China Textile Annual Conference Will Be Held In Shanghai On October 24Th ~26.

The twelfth Asian Spin The conference (ATC12) and the 2013 China Textile academic annual conference will be held in Shanghai on October 24th ~26. The conference invited many famous experts and scholars in the industry to discuss the textile theory research, production practice and technology application. It is understood that Professor Wang Hua of Sichuan Textile Science Research Institute will make comments on the research and application of POM.

In the next 40 years, at least half of the world's machinery will be made from a variety of fiber reinforced composites, which belong to the category of industrial textiles. In recent years, China's industrial textiles industry has made rapid progress, and a number of high-performance fibers with independent intellectual property rights have been developed in China. However, some of the existing raw materials can not compete with similar products abroad, and many varieties of raw materials still can not be industrialized and need a large number of imports.

Polyoxymethylene (POM) is a linear polymer without branched chain, high density and high crystallinity. It has excellent mechanical properties, electrical properties, good abrasion resistance, dimensional stability, chemical resistance, especially fatigue resistance, and has good self-lubricating properties, strong coloring and wide use temperature range. It is one of the three major engineering plastics in the world. It is widely used in automotive industry, various mechanical equipment, instrumentation and construction equipment. The research and development of POM fiber in China started late. Due to the special performance of production equipment and POM, there is no large-scale production in China at present.

The key technical problem affecting the industrialization of polyoxymethylene is that it crystallizes too fast. It can not be completed by ordinary melt spinning method, like polyester and polypropylene. Polyoxymethylene melted and crystallizes immediately after melting. It is very difficult to stretch at later stage. How to control the crystallization time of polyoxymethylene is the most important thing to solve technical breakthroughs. "We want to make the more amorphous area the better, the less crystalline area is, the better the later stage of the crystallization process is to further improve the crystallinity, so as to improve the orientation degree, thereby improving the crystallinity and strength." Wang Hua said. And how to control the crystallization time? This requires the design of molecules in the synthesis of resins, the processing of raw materials, and the matching of some modified equipment and technology. "Through a lot of experiments to find problems, solve problems, foreign can do, as long as we persevere, we will certainly be able to do, and beyond them." Professor Wang Hua's speech is full of determination and confidence as a scientific researcher.

"Research and development of new materials and new products is not for purely research, so that the final realization of new products industrialization is the ultimate goal of research." Wang Hua said. In fact, China's demand for POM in the building material industry is quite large. Because of the defects of the original ecology in the curing process, if the cracks expand, the mechanical properties such as compressive strength and tensile strength of concrete will be affected, and these problems will be solved after adding POM. Wang Hua once did an experiment, adding 0.9 kilograms of POM in the concrete of 1 cubic meters, and the breaking strength of concrete can be increased by 28%. However, due to the high price of imported polyoxymethylene, the largest amount of polypropylene used in China is polypropylene fiber, but its compatibility with concrete is poor and its dispersion is poor. "We should not only develop polyoxymethylene fibers independently, but also develop a relatively cheap POM fiber so that it can truly achieve industrialization." Wang Hua said.

At present, the price of fiber grade polyformaldehyde resin abroad is about 30 thousand yuan / ton, and the price of polyformaldehyde fiber jointly developed by Professor Wang Hua and Yunnan natural gas chemical Limited by Share Ltd can be controlled within 20 thousand yuan / ton. "In addition to conquering technical difficulties, there is still a breakthrough in prices to enable the products to be viable." Wang Hua said proudly, "as long as we have orders, we can make them." Moreover, the brand of polyformaldehyde fiber grade resin developed by Wang Hua is much larger than that of other countries. Accordingly, the corresponding resin grades correspond to different fiber specifications, and now the production scale of polyoxymethylene fiber can reach 1000 tons.