The hottest new materials contain new business opp

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Hot new materials contain new business opportunities

PTT (polyethylene terephthalate) is a polyester resin polymerized from dimethyl terephthalate or terephthalic acid and 1,3-propanediol. It has good processing properties, electrical properties, mechanical properties and dimensional stability. It is very valuable for development. The inclination during handling should not be greater than 45 degrees. The new synthetic fiber materials and engineering plastics made of PTT have a very broad application prospect

although PTT was successfully synthesized in the laboratory as early as 1941 when pet (polyethylene terephthalate) resin was studied, and efforts were made to improve the safety level and overall quality of the chemical industry, PTT did not realize industrialization until the 1990s, because it was difficult to industrialize 1,3-propanediol monomer, the main raw material for preparing PTT. In the 1990s, several major international companies successively made breakthroughs in the new synthesis process of 1,3-propanediol, thus making PTT production enter the stage of industrial development. As the industrialized 1,3-propanediol unit was completed and put into operation, various fiber manufacturers have joined the ranks of PTT development. At present, the United States, Europe, Japan, South Korea and Taiwan have all begun to industrialized PTT production and set off a development boom, but the world's PTT production capacity is mainly concentrated in the United States

after developing the possible valuable market applications of PTT, including spunbonded nonwovens, monofilaments, polyester dyeing aids, thermoplastic engineering plastics and films, the results show that the most promising applications of PTT are to replace nylon (nylon 6 or 66) as raw materials for chemical fiber carpets, as well as the fields of fashion fabrics and nonwovens. The clothing made by Asahi Kasei with 100% PTT has entered the market. The industrial production of PTT in mainland China is still in the stage of project approval, but from the market capacity of carpets, textiles and engineering plastics, it has broad prospects. With the continuous improvement of PTT process, the reduction of production cost and the development of application market, it will compete with pet, PBT (polybutylene terephthalate) and PA66 in performance and price. The national industrial department has included the development of PTT in the "Tenth Five Year" synthetic fiber structure adjustment plan

the development of 1,3-propanediol in China is also in its infancy. Some domestic units have carried out pilot study on propylene glycol synthesis with rich industry experience and development trend. It is understood that Heilongjiang Petrochemical Research Institute has developed a pilot process for the synthesis of 1,3-propanediol from acrolein. In addition, Liaoyang Chemical fiber, Yizheng Chemical fiber and Shanghai Petrochemical are interested in developing PTT, but the key lies in whether they can get low-cost 1,3-propanediol

pet and PP, the main raw materials of domestic chemical fiber carpets, account for the vast majority of chemical fiber carpet raw materials, and the market share is stable. At present, the domestic chemical fiber carpet supply exceeds demand, and the varieties are mainly medium and low-grade polypropylene. How to select excellent experimental machine carpets. The domestic annual production capacity is about 20million square meters, and nearly one third of the chemical fiber carpet manufacturers are in the state of shutdown or semi shutdown. Due to the weakness of the inherent performance of polypropylene carpet, its development is at a standstill

due to its good resilience, antistatic and antifouling, the demand for nylon carpet has increased year by year, especially in recent years, due to the decoration demand of medium and high-end hotels and restaurants, which makes the nylon carpet market booming. In 2000, the domestic nylon production capacity was about 499000 tons and the output was 403000 tons, most of which were filaments used as nylon cord fabric. In the past two years, due to the potential market prospects, nylon carpets in China have developed rapidly

ptt is used as raw material of chemical fiber carpet, and its performance is excellent. PTT not only has the unique fluffy and resilience of nylon fiber, but also has the excellent anti fouling and anti-static capabilities of pet and PP. In addition, because PTT carpet does not need to use dyeing carrier, it can avoid the harm to the environment caused by the use of some dyeing carriers, and does not need to add dyeing equipment, which can save investment

ptt fabrics are mainly used to make sportswear and ready-made clothes, as well as indoor decoration and medical and health non-woven fabrics. Especially in the field of clothing, they can replace PA and have almost all the properties required by fashion materials: extensibility, flexibility and wrinkle resistance, and they are concentrated in one material

As a thermoplastic engineering plastic, PTT not only has the physical properties of pet, including strength, toughness and heat resistance, but also has the processing advantages of PBT, such as low melt temperature and fast crystallization, while maintaining the basic advantages of polyester, namely dimensional stability, electrical insulation and chemical resistance. Like other polyesters, PTT engineering plastics can also be modified by adding additives such as reinforcing fibers. The modified materials have better dimensional stability. Therefore, PTT is also a thermoplastic engineering plastic with great application potential, which can compete with pet, PBT and PA66 in the electronic/electrical, automotive, appliance and furniture markets

The production mechanism of PTT is basically the same as that of pet and PBT. The preparation methods include dimethyl terephthalate exchange method and terephthalic acid direct esterification method, both of which are mature processes. The direct esterification process has the advantages of reasonable production process, short process, low investment, high production efficiency, no need to use methanol in the production process, can simplify the recovery process and equipment, and can reduce environmental pollution, production safety, low raw material and energy consumption, so the production cost is low

if PTT can develop as fast as pet in the past 10 years in the next 10 years, the market prospect will be greater

ptt may become the most popular fiber material after pet

the scale of polyester fiber industry in China ranks first in the world. In recent years, the global polyester market has changed. In previous years, when the market was at a low ebb, China's polyester fiber management was difficult. One of the reasons was that the product structure was single and the ability to resist market risks was not strong. Therefore, facing the future competition, the huge domestic polyester fiber industry is bound to develop towards high added value, differentiation and functionality. China is also the world's major consumer market for polyester and thermoplastic engineering plastics, and is the target market for many polyester producers. As a new polyester resin, PTT is a new business opportunity with broad potential market prospects and development value

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