Although China's PVC (polyvinyl chloride) pipeline general low-end product capacity is amazing, but the quality of products to meet international standards is not much. The productivity of low-end products is far greater than the market demand, but large-scale investment is still concentrated in these products, causing concern and doubts of relevant experts. Last week, Zhang Yuchuan, chairman of the Beijing Plastics Industry Association, said in an interview with this reporter that China's PVC pipe industry needs to improve its product performance level and attack the high-end market. It is understood that in 2011, there were more than 3,000 plastic pipe production enterprises above designated size in China, and the annual production capacity of nearly 20 enterprises had reached or exceeded 100,000 tons. The total output of PVC pipes reached 8.8 million tons, ranking first in the world and accounting for about 60% of the production capacity of plastic pipes. Zhang Yuchuan introduced that from an international point of view, some advanced PVC pipe manufacturers have been exploring and improving the performance level of PVC pipe systems and broadening the application areas of PVC pipe systems through continuous research and trials, and have achieved remarkable results. However, our enterprises are lagging behind. For example, by improving the quality and reliability of PVC pipe systems, PVC pipes can be safely used for more than 50 years, explore and ensure the use of quality for 100 years; develop a modified PVC pipe system with good impact resistance and crack resistance (PVC-M) Through the two-way stretching in the pipe processing process, the toughness (PVC-O) is increased while the strength is greatly increased; the application field is expanded, and the application is applied to non-excavated pipelines, as well as the transmission water and compressed air pipelines in deep wells. Wait. The development trend of international PVC pipelines provides a direction for the Chinese industry to open up markets. Zhang Yuchuan said that due to the relatively high elastic modulus and strength of PVC, pressure-free pipelines such as drainage pipes and buried drains in buildings have historically dominated the market. However, due to the large number of low-cost, low-quality PVC pipes in China flooding the market, coupled with the proliferation of fake and shoddy products, the reputation of PVC has been severely damaged, and even some areas have experienced a significant decline in market share. For example, unplasticized PVC (PVC-U) pipes were originally ranked first in the South for small-diameter underground drainage pipes, but in order to reduce costs, excessive quantities of fillers were added to the products and the wall thickness of the pipes was reduced in violation of the rules. The degree has become a poor product in many users' impressions. Therefore, the top priority of PVC is to enhance market confidence by improving product quality, and at the same time, it is necessary to pay attention to quality innovation and re-establish the credibility of PVC-U pipelines so as to consolidate and expand the traditional market of these PVC pipes. Industry experts believe that there are many drainage networks that need to be constructed to control water pollution and protect water resources in China. There is a huge market demand for high-quality PVC-U buried drainage pipes. Zhang Yuchuan stated that the main supply market for PVC pipes is the urban and rural water supply network. Due to the relatively poor reliability of PVC-U pipes produced in China, the water supply pipe network in urban and rural areas has not been widely applied and has become the main cause of poor market supply. For this reason, some experts have proposed to develop a combination of strength and toughness impact modified PVC pipe (PVC-M). The successful experience of China's leading enterprises in the development of PVC-M has proven that China has the ability to produce PVC-M that has reached the international advanced level, and has a good cost performance, has the ability to compete with high-density polyethylene pressure pipes, can achieve economic benefits and social Synchronous increase in efficiency. In recent years, the urban and rural water supply networks in various countries around the world have been promoting the technology of trenchless laying, and the United States, Japan, Europe and Australia have all developed a variety of non-excavation laying PVC pipes. According to foreign experience, China's modified PVC pipe can also enter this market, and the prospects are very broad. PVC-O, also known as biaxially oriented PVC, is a tube made with a special orientation. This process is to use the extrusion method of PVC-U pipe axial stretching and radial stretching, so that the PVC pipe in the long-chain molecules in the biaxially arranged regularly to obtain high strength, high toughness, high Impact-resistant, fatigue-resistant new PVC pipe, performance far better than ordinary PVC-U pipe. PVC-O pipes have been used in many countries such as the United Kingdom, France, the United States, Australia, South Africa and Japan for many years, and have perfect international standards. However, China has not yet fully grasped the production technology of PVC-O pipe. At present, only one company has started trial production of small-diameter PVC-O pipes. The reliability has yet to be verified. Experts believe that it is technically difficult for China to completely develop PVC-O pipe technology at this stage. It is recommended that investors consider introducing technology to speed up the gap in this regard. Recently, it has been reported that a new two-step process has been developed successfully in foreign countries, which can significantly increase efficiency and reduce energy and labor consumption. It will be possible to enter high-end markets that require high pressure resistance and high toughness. China's industry should pay attention to tracking these cutting-edge technologies in the international market. Ningbo Yinzhou Leisheng Machinery Co.,Ltd , https://www.thundermach.com