Polypropylene Industrial Silk Equipment Improves New Development of Industrial Fibers

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Beijing Zhongli Machinery Engineering Technology Co., Ltd.

1   Overview

In 2005 , the production of polypropylene in the world was about 3 million tons, which was an increase of 0.6% compared with 2004. Among them, filaments increased by 0.7%. This was mainly due to the increase in the use of national filaments in the United States, the Middle East and Turkey. China's national production statistics are 244,600 tons, which may be about 600,000 tons. Among them, more than 80% are polypropylene filaments, and they are basically coarse denier filaments. China's polypropylene production is mainly distributed in the southeastern coastal provinces and cities, of which Jiangsu, Shandong, and Guangdong have an annual production capacity of over 100,000 tons; Zhejiang, Liaoning, Shanghai and Henan also have an annual production capacity of more than 40,000 tons.

High-strength polypropylene industrial yarn, also known as high-strength polypropylene filament, has the properties of light weight, high strength, abrasion resistance, low thermal conductivity, acid and alkali resistance, chemical resistance, low electrostatic accumulation, and low moisture regain. It can be widely used for weaving various types of industrial spinning products. With the continuous progress of China's industrial technology, it is expected that the domestic market demand will increase at a rate of 5% per year, especially in the industrial sector.

Polypropylene industrial yarn spinning equipment has been dominated by imported equipment abroad. It lacks incentive mechanism for market competition, domestic development of polypropylene industrial yarn one-step method, and requires high foreign exchange introduction, which seriously hinders the rapid development of China's polypropylene industrial yarn one-step method. In recent years, Beijing Zhongli Machinery has successfully developed the nationally-produced, advanced, practical and inexpensive polypropylene industrial yarn spinning equipment and the matching high-speed automatic winding heads, and has made significant progress in engineering and marketization. The breakthrough progress has created better conditions and technological basis for the rapid development of one-step polypropylene industrial wire in China. A total of 96 polypropylene one-step spinning and drawing machines provided by Beijing Zhongli Machinery were put into use, with a production capacity of 32,800 tons/year. In addition, Beijing Zhongli Machinery provided a two-step method for domestic and foreign companies in the 1980s and 1990s. 482 spinning machines have a total capacity of 1 million tons.

2   Promotion of China-made Polypropylene Industrial Silk Spinning Machine

Beijing Zhongli Machinery Co.,Ltd.

3   Polypropylene industrial silk production process

3.1   Polypropylene Industrial Silk Introduction

    Polypropylene filaments for industrial use refer to denier polypropylene filaments (generally greater than 330 dtex). At present, domestic products are mainly divided into two categories, ie, strong and high-strength. The raw material of denier polypropylene filament is cheap, low in processing energy consumption, small in specific gravity, non-toxic, non-polluting, corrosion-resistant, and recyclable. It is extremely competitive.

Denier Polypropylene Filament Characteristics

3.2   The use of denier polypropylene filaments

The biggest characteristic of industrial polypropylene filaments is that the strength and elongation in the wet state are consistent with those in the standard. This is inferior to cotton, viscose fiber and polyamide fiber, but the adhesiveness of polypropylene filament and rubber is poor, and it is easy to age and melt. Low, hard to coat. It is mainly used for the production of safety belts, slings, strapping belts, mesh belts, canvases, tarpaulins, shade cloths, geotextiles, ropes and cables.

3.3   Process flow:

n       Two-step process route: Production of UDY or POY followed by draft forming winding. Due to the small investment and low production technology, many domestic SMEs have adopted such a process route at present. However, the technology is relatively backward, covers an area of ​​large, the strength of the production cord is low, the product quality is unstable, and the consumption is large. The production cost is relatively high and new projects are no longer promoted and adopted.

n       One-step process route: using spinning, drafting, setting retraction, one-step winding process, advanced technology, short process, small footprint, high strength, and good quality, so the current introduction and new projects are one step French route.

The following are several models of polypropylene industrial yarn spinning and weaving machines that are promoted by Beijing Zhongli Machinery in the market.

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