Our meltblown nonwoven fabric development and technological progress 1 meltblown nonwovens infancy:
Meltblown nonwovens are an important breed developed earlier in the world of nonwovens, and their development dates back to the 1950s. At that time, around the nuclear test to capture radioactive particles in the atmosphere, in 1951, the US Naval Research Institute proposed to develop a non-woven fabric made of organic fibers with a fiber diameter of less than 1 μ for filtering radioactive particles in the atmosphere. In the early 1960s, Exxon of the United States successfully manufactured the first large-scale melt-blown device to meet the above requirements. By the late 1960s and early 1970s, Exxon had transferred its research-smelting melt-blown technology to include Accurate Product (American, later acquired by Reifen), J&M Laboratories (USA, later by Nordson, now Nordson and Neumag Saurer). Mergers and other companies, including Reifenhauser (Germany), meltblown products quickly entered the civilian market and quickly achieved industrial production. Exxon's technology transfer does not focus on transfer fees, but looks at melt-blown companies to purchase its proprietary polypropylene chips. In 1984, Exxon also provided two melt-blown test equipment to the University of Tennessee to further research and develop melt-blown technology. In 1989, the two established the Textile and Nonwovens Research and Development Center (TANDEC). Since then, the University of Tennessee has become a technical research and education center for nonwovens. In 1995, the annual production of meltblown nonwovens in the world reached 80,000-100,000 tons, accounting for 4-4.7% of the non-woven production of the year. At the same time, in the case of medical and health applications, for the low strength of meltblown nonwovens, the company Kimberly and other companies have developed successful spunbond and meltblown composite SMS products. At that time, several major international production plants SMS class. The production capacity of the product has exceeded the capacity of pure meltblown products.
China's research on meltblown nonwovens also originated from the Second Institute of Nuclear Industry Research. In the late 1950s and early 1960s, the Second Institute of the Ministry of Nuclear Industry and the Beijing Institute of Synthetic Fiber Technology also developed melt-blown equipment for obtaining microfiber nonwovens, but the equipment was intermittent. Then, the industrial production of melt-blown nonwovens began. The products, in addition to processing protective masks and gas masks, also processed various types of filter cores, battery separators and other products. Later, China Textile University and Beijing Super Fiber Co., Ltd. also produced batch melt-blown equipment in batches and mainly developed in the direction of civilian use. At that time, a number of domestic enterprises used these equipment to produce melt-blown products such as battery separators, filter cores, mask materials, thermal insulation materials, and oil-absorbing materials. By the end of the 1960s and early 1970s, the number of batch melt-blown equipment in China had reached 200 units. Above, the capacity of each equipment is about 20-80 tons/year. In 1995, the production capacity of the national melt-blown equipment has reached 10,000 tons/year, and the actual output (including finished products) is 0.35 million tons. The actual production in 1996. More than 4,000 tons, these productions are mainly provided by batch equipment, and the continuous melt-blown equipment produced less than 1,000 tons in 1996. The development of continuous melt-blown equipment was later than intermittent in China. In the period of 1992-94, Anhui Aohong, Tianjin Meilun (predecessor of TEDA) and Jiangyin Jinfeng Cai successively introduced continuous production lines from the United States and Germany. Aohong introduced Accurate in the United States. Equipment, Tianjin Meilun was a Sino-US joint venture at the time. Its first equipment was assembled from the United States, and Jinfeng's equipment was imported from Reifenhaus, Germany. In addition to Tianjin Meilun Co., Ltd., because it is a joint venture, its products have found the market earlier. Aohong and Jinfeng have experienced very difficult years and did not find the market until the late 1990s. Therefore, when it comes to the history of China's meltblown nonwovens, we must not forget the role that intermittent meltblown has played. So far, it is estimated that there are still more than 300 batch meltblown equipment in operation in the country. Only the Shanghai Jiarong, Jiangsu Tengda, and Hangzhou Zhongnan this melt-blown production enterprise complex has 130-140 batch melt-blown equipment (including some of which have been changed from intermittent to reciprocating continuous melt-blown equipment). A total of 3,900 tons of meltblown products. However, continuous melt-blown equipment is currently dominant in China. In 2006, the output of domestic melt-blown nonwovens exceeded 20,000 tons, of which about 70% were produced by continuous melt-blown equipment. Due to the high output of continuous melt-blown equipment, low cost of personnel and convenient management, the development of melt-blown nonwovens in the future will mainly refer to the development of continuous melt-blown equipment.
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