The production capacity of China's renewable industry is concentrated, and the production capacity of about 7 million tons is mainly distributed in East China. Among them, Jiangsu and Zhejiang provinces accounted for more than 71% of the country's total production capacity. Guangdong, Fujian, and other two provinces accounted for 10% of the country's total production capacity. The capacity of the rest of the country was less than 19%. The volume of recycled chemical fiber exports is large and the process is increasing year by year. Of domestic polyester staple fiber exports, more than 50% of the export volume is recycled polyester staple fiber, contrary to importation.
At present, the production capacity of recycled polyester staple fiber in cotton textiles still dominates, accounting for more than 60% of the total. Non-woven and filled products followed, with smaller proportions of new products such as filaments and fine deniers. According to regions, Jiangsu mainly uses recycled polyester staple fiber for cotton and non-woven, while Zhejiang mainly fills and filament products, while Guangdong and Fujian also use filled products.
As the production capacity and output of recycled chemical fiber continue to climb, the demand gap for raw materials has also increased significantly. According to incomplete statistics, it is expected that by the end of 2010, the polyester production capacity will exceed 30 million tons (statistical production capacity) and the output will be about 25 million tons. The recyclable polyester scrap will be calculated at about 0.25 million tons according to a 1% scrap wire rate. It is estimated that by the end of 2010, the output of PET bottles in China will reach 3.6 million tons per year, and the production of PET film will be about 600,000 tons. The total output of the two products will be about 4.2 million tons. According to the annual export of 1 million tons, the recycling rate will be calculated at 5%. About 2.89 million tons of bottle tablets and polyester film were used as raw materials for recycling chemical fiber. In addition, the annual import volume is about 1.3 million tons, and the total amount of all raw material sources for recycled chemical fiber is 4.27 million tons (the actual amount used should be 3.67 million tons, because the entire bottle is processed into bottle tablets with 7% cover, 2% paper, and 5% Moisture, dust and intangible depletion make it difficult to meet production requirements.
85% of the imported bottle tablets are used for the production of chemical fiber products, 10% for the production of packaging tapes, and 5% for the processing of bottles and other uses. Among other uses, the demand for unsaturated resins (decorative paints) has continued to expand, resulting in more intense and unstable bottle blanks in some regions (mainly in Guangdong Province). Waste PET bottle tablets mainly come from the United States, Japan, South Korea, Thailand, Germany, Australia, Canada, Russia, Argentina, India, Indonesia, China Taiwan and other countries and regions.
In terms of bottle bricks, as of the end of 2009, it is estimated that there will be approximately 17.65 million tons/year of bottle-sourced capacity worldwide, including 3.3 million tons in Europe, 3.75 million tons in North America, 850,000 tons in South America, and 1.75 million in the Middle East (including South Africa). Tons/year, Asia 8 million tons/year (of which China 3.6 million tons/year).
The recognition of energy-saving and emission-reduction in the recycled chemical fiber industry is in place, and the input is significant. The effect is very significant. Wastewater is reduced to 37.50%, 27.78%, and 23.33% in 2010, compared with 2005, in the production process of the entire bottle processed into a clean bottle, a clean bottle into a short fiber, and a clean bottle into a POY filament. COD in the entire bottle processing into a clean bottle, the bottle into a short fiber, clean bottle processing into POY filament production process, the 2010 indicators than the 2005 emissions were reduced by 27.78%, 37.50% and 33.33 %; SO2 in the production process, the indicators in 2010 than the 2005 emissions decreased by 66.67%. The waste filaments and waste generated during the production of staple fibers and filaments also decreased by 20.63% and 50.00%, respectively.
Source: China Polymer Network
A rivet is a nail-shaped object used to connect two parts (or members) with a through hole and a cap at one end. In riveting, the riveted parts are joined by self-deformation or interference. There are many kinds of rivets, and they are not in any form. Commonly used are R type rivets, fan rivets, pull core rivets (hit core rivets), tree rivets, half round head, flat head, half hollow rivets, solid rivets, countersunk head rivets, pull core rivets, hollow rivets, which are usually connected by their own deformation. Generally less than 8 mm with cold riveting, larger than this size with hot riveting. But there are exceptions, such as the nameplates on some locks, which are riveted using the interference between the rivet and the lock hole.
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