Polypropylene Industrial Development at Home and Abroad

Polypropylene has characteristics that other synthetic fibers do not have, and it is a variety that has a promising future. The fiber has relatively low density, low melting point, glass transition temperature and moisture absorption, high crystallinity, good chemical resistance, and excellent mechanical properties. In some aspects polypropylene can replace other synthetic fibers. However, some defects in the performance of polypropylene also restrict its application in certain fields. Therefore, if we can give full play to our strengths and overcome their shortcomings through the adoption of new processes and modified technologies, the future prospects for the development of polypropylene will be very broad.

I. Foreign polypropylene market situation In the late 1990s, the world polypropylene industry developed rapidly. The main reason is that the United States has developed rapidly. In 1999, the consumption of polypropylene in the world exceeded 5.5 million tons. In 1999, the annual growth rate of polypropylene production in the world was 6%. The main production areas are the United States, Western Europe and mainland China. The output of the three regions accounted for 62% of the world's total output. In 2000, the production volume in developing countries began to develop, with a total output of 22,700 tons. There are more than 2,000 polypropylene production enterprises in the world, but three-fold One's output is concentrated in the eight largest companies.

The application of polypropylene in Western Europe is mainly focused on polypropylene felt cloth, which is used for the base cloth of the carpet. The United States is mainly used in the following six aspects, namely cement and clay reinforcements; geotextiles, such as materials to prevent dams or highway railways from collapsing; as a competitive material for acrylic, used in canvases and upholstery; Diapers, incontinence products, clothing materials, fibers, yarns, or fabrics for export.

The main uses of polypropylene in the United States focus on three major areas:
First, clothing: The American Polyolefins Association is keen to promote the use of polypropylene in the apparel field. Among them, knitted fabrics are used in sportswear, women's thin socks, and stretch pants; the acrylic yarn is used as the base yarn and polypropylene yarn. The woven uniform fabrics are also very popular. Polypropylene filaments are used as weft yarns, and cotton as a mechanism for warp yarns is also very popular. In 1999, the consumption of polypropylene fabrics in the United States reached 1.5 million tons, and the annual growth rate of polypropylene consumption for clothing from 1999 to 2003 is expected to be 10%.

Second, interior decorations: Due to the fact that polypropylene fibers can be used to fabricate new soft fabrics in recent years, they can be competed with acrylic fibers to make various decorative flannelettes, and can also be competed with acrylic fibers to make various decorative flannelettes. Synthetic fiber blended spun yarn fabrics, coupled with the increase in the construction of new homes in the United States, the stimulation of discounted consumption, and the decoration and continuous renovation of rooms and hospitals, total consumption of indoor fabrics, blankets, and carpets reached 837,500 tons in 1999. From 1998 to 2003, the annual growth rate of indoor fabrics was 5%, and the production of interior decorations was mainly concentrated in seven companies.

Third, non-woven fabrics: US polypropylene in the field of non-woven fabrics applications began to rise in 1998, rapid development after 1999, mainly due to a large number of new polypropylene products replace viscose fiber and viscose fiber, as a material for health care materials This application has accounted for 55% of the total amount of non-woven fabrics, mainly diapers and incontinent materials for adults. Geotextiles are the second largest application area. Among geotextiles, 90% use polypropylene and 10% use polyester. In geotextiles, 80% use nonwovens and 20% use wovens.

Nonwovens for furniture is the third largest application area for nonwovens. In this regard, polypropylene nonwovens accounted for 14%, mainly for decorative fabrics and bedding, but due to the rough feel of polypropylene, generally used as interlining or backing.

Medical nonwovens are the fourth largest application area of ​​nonwovens, among which 3,800 tons are spunbonded nonwovens and 15,900 tons are meltblown nonwovens. Polypropylene nonwovens account for 40 to 50% of the medical nonwovens market. The annual growth rate of consumption from 1998 to 2003 was 3 to 4%, but it was also estimated at 1%.

In addition, non-woven fabrics for automotive, agricultural, workwear and rags are also growing. The annual growth rate of consumption from 1998 to 2003 is estimated to be 4 to 5%.

Natural Wool

"SD" has formed a the unique style of tech and innovation with over 20 years.