Spunbond method is a comprehensive technology involving many disciplines. Spunbond technology is developing rapidly. At present, several process production modes with distinctive characteristics have been formed. We should strengthen development efforts, constantly innovate, and form our own proprietary technology and intellectual property rights is the fundamental way for enterprises to be invincible.
1 large plate narrow
Due to the uniform surface of the product produced by the large board mode, it is suitable for medical and health products. Since most of these products are colored, due to the low output of the narrow-width production line, several narrow-width small lines are installed, and each line produces a color To minimize transitional color products and improve economic efficiency.
2 small plates wide
In the small-plate mode, the net-to-horizontal strength difference is small. The products are suitable for waterproof base fabrics and packaging materials. Most of these products are colorless. At the same time, the processing cost of wide-format large-plate spinnerets has doubled. The 5.lm width production line has been put into production. At present, domestic high-output extruders have been industrialized, and the manufacturing technology of wide-width hot rolling mills has matured. Production lines with an annual output of tens of thousands of tons with a width of 6.4m and 9.6m are also possible. It is estimated that the single-die head with a width of 6.4m has a power consumption of 450Kwh on the 20,000 t / a production line; the large-plate mode dual-die head with a width of 3.2m has a power consumption of 15,000 t / a and a consumption of 434Kwh.
With the rapid development of the nonwovens industry in recent years, the number of spunbond yarn production has expanded rapidly, and the improvement of the production capacity of stand-alone equipment has become the focus. Although there are some difficulties in the design and manufacture of wide-format high-speed production lines, the high-volume production lines play an active role in reducing the processing cost and scale management of the entire industry, and enable the production enterprises to bring considerable economic benefits in market competition. For example, in the 1970s, the output of small chemical fertilizers was 3,000 t / a, which was later developed into a large 300,000 t / a ammonia synthesis plant; the output of the original small paper mills was several thousand tons, and 400,000 t / a paper machines have appeared in recent years. This is a trend of social development and an inevitable result of market competition and technological progress.
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