Precision punching needle roller series Our company specializes in film punching needle rollers, packaging film punching needle rollers, aluminum foil punching machines, copper foil punching machines, product quality and processing technology reliability, stability is at the domestic advanced level, and can be produced according to customer requirements A special specification of needle roller and needle ring products. Welcome customers to come and inquire.
Needle roller, also known as needle cylinder. A metal cylinder with steel needles planted on the surface. It is installed in the drafting zone for controlling and carding fibers. It is used on spun silk and wool spinning roving frame, carded wool spinning frame, spun spinning and shaft spinning frame. The main body of the needle roller is a copper cylinder with small holes drilled on the surface and steel needles are planted in the holes. Both ends of the cylinder are equipped with a flange, the surface of which is slightly higher than the needle tip to protect the needle tip from damage. The main parameters of the needle roller are: bottom diameter, outer diameter, needle width, needle height, needle density, needle angle and needle number. In order to adapt to the processing of different types of fibers, the small carding roller on the rotor spinning machine has the saw teeth replaced with needles, also called needle rollers.
Needle Roll, Cold Punching Needle Roll, Embossing Needle, Carding Machine Needle Roll, Film Punching Needle Roll, Aluminum Foil Punching Needle Roll, Non-woven Punching Needle Roll, Heated Punching Needle Roll, Heated Perforated Needle Roller Changzhou Puyisen Machinery Technology Co., Ltd. , https://www.pysmachine.com
Capacity production has increased significantly, and the scale of enterprises has significantly expanded. During the “Eleventh Five-Year Plan†period, the chlor-alkali industry has developed rapidly and output has increased greatly. In 2006, the output of caustic soda in China reached 15.12 million tons, ranking first in the world. In 2007, China's PVC production reached 9.72 million tons, surpassing the United States, becoming the world's largest producer, and becoming a veritable chlor-alkali power. In 2010, China's caustic soda production capacity was 28.84 million tons, and its output was 21.06 million tons; PVC production capacity was 19.23 million tons and output was 11.28 million tons.
Through industrial policy control, market guidance, raw material route, technological transformation and enterprise integration, the scale of caustic soda production enterprises in China has been further improved. The average size in 2005 was 63,000 tons, and the average output of the top ten companies was 300,000 tons. The average production capacity of the industry exceeded 96,000 tons, the average production capacity of the top ten companies reached 440,000 tons, the number of caustic soda enterprises with more than 400,000 tons increased to 13 and the number of PVC enterprises with more than 400,000 tons increased to 12. At the same time as the development of the group, the development of the park has also made progress. Many recycling patterns of chlorine in the Shanghai Chemical Industry Zone and comprehensive utilization patterns in the upper and lower reaches of Xinjiang Tianye have emerged.
The industrial structure has been upgraded, and the rise of the western region has increased the proportion of caustic soda. The ion membrane technology with advanced technology, cleanliness, and low energy consumption has been widely used, and the ion-exchange membrane caustic soda has rapidly increased. In 2005, the proportion of ion-exchange membrane caustic soda was only 26%, and it increased to 76% in 2010. In terms of PVC, acetylene PVC has become dominant, and the proportion of acetylene PVC has increased from 57% in 2005 to 80% in 2010.
During the “Eleventh Five-Year Plan†period, the chlor-alkali industry in the central and western regions rapidly emerged, and the trend of shifting the chlor-alkali industry production center to the central and western regions became more and more obvious. The development of chlor-alkali enterprises in the central and western regions showed significant resource-oriented features. In 2005, the PVC production capacity in the central and western regions was only 2.88 million tons, accounting for 31% of the country; in 2010, the PVC production capacity in the Midwest was estimated to be 8.19 million tons, accounting for 43% of the country's total.
Technological breakthroughs have been achieved, and the level of equipment has been continuously improved. During the “Eleventh Five-Year Plan†period, a number of advanced production processes were developed and utilized. A brine purification technology has developed a ceramic membrane filter and a CN filter in succession, with good results, ensuring the safe and stable operation of ion-exchange membrane caustic soda equipment. Shouguang Xinlong Electrification Group's successful dry acetylene generation process, the calcium carbide slag produced is 4% to 10% moisture content, calcium carbide hydrolysis rate is greater than 99%, water conservation can reach about 90%, overcoming the previous wet system Acetylene consumes a large amount of water and produces a large amount of carbide slag defects. Shijiazhuang Kechuang Auxiliary Co., Ltd. successfully developed a powdered composite chlorinated low-mercury catalyst that can be reused more than five times. It can make the reaction of vinyl chloride more stable and easy to control, and its reaction activity, selectivity and service life are better than Ordinary high mercury catalyst.
During the “Eleventh Five-Year Plan†period, China’s ability to independently innovate in chlor-alkali equipment continued to increase, further enhancing China’s chlor-alkali competitiveness.
In 2008, Bluestar Beijing Chemical Machinery Co., Ltd. has developed and developed a natural circulation membrane pole distance membrane electrolyzer, and it is operated in Hebei Qiheng Chemical Co., Ltd., and the indicators have reached the design requirements. The large-scale development of the polymerization reactor, 135 cubic meters of large-scale PVC polymerization reactor put into operation, automatic control system (DCS) has also been popular. What deserves special mention is the breakthrough in localization technology of ion membranes. In 2010, Shandong Dongyue mastered a full set of preparation technology for ion membranes from raw materials to ion exchange membranes.
The globalization of the market and the increase of international discourse power With the rapid development of the chlor-alkali industry, the proportion of caustic soda and PVC in the world's total production capacity has continuously increased. In 2005, the proportion of caustic soda and PVC in the world was 23% and 25% respectively. By 2010, it will have increased to 38% and 40%, both increasing by 15 percentage points. The right to speak in the international market will be greatly enhanced.
During the “Eleventh Five-Year Plan†period, the ability to participate in the international market has been greatly improved, and the caustic soda and PVC markets have spread all over the world. PVC has changed from an importing country to an exporting country, and its export volume has continued to increase. During the "10th Five-Year Plan" period, China's PVC imports an average of 363,000 tons per year. In the “Eleventh Five-Year Plan†period, the average annual export volume was 403,000 tons. Exports of caustic soda increased significantly. During the “Tenth Five-Year Plan†period, the average annual export was only 505 thousand tons, and during the “Eleventh Five-Year Plan†period, the average annual export volume increased to 1.57 million tons, an average annual increase of 1 million tons.
Chlor-alkali is a basic raw material industry for the production of caustic soda and chlorine from salt and electricity. There are many types of chlor-alkali products, and the degree of correlation is large. Its downstream products reach thousands of varieties. During the “Eleventh Five-Year Plan†period, the chlor-alkali industry in China has developed rapidly, and the output of caustic soda and PVC has ranked first in the world, which has strongly promoted the development of related industries.