1. Basic situation of radiation crosslinked heat shrinkable materials in China

The level of radiation crosslinked heat shrinkable tube manufacturers in China can be summarized in one sentence: China is the second largest country in the world that produces radiation crosslinked heat shrinkable products (the United States is the first), and the third heat shrinkable product export country (Tyco, the second DSG CANUSA). The products are sold in more than 60 countries and regions.

According to the report of China isotope and radiation Industry Association, the sales of radiation crosslinked heat shrinkable materials reached 5 billion in 2008. There are more than 200 radiation crosslinked heat shrinkable material manufacturers with a certain scale, more than 150 industrial electron accelerators, and more than 90 cobalt sources for radiation processing.

2. Problems of radiation crosslinked heat shrinkable tube manufacturers in China

2.1 there are many small enterprises, the price war is fierce, and the competition is disordered. Due to the rapid development of China's radiation electron accelerator manufacturing enterprises, the production of radiation crosslinked heat shrinkable materials is no longer mysterious. Due to the low investment threshold and fierce market competition in the production of heat shrinkable materials, repeated construction is caused. There are many manufacturers, small and complete in scale, low-level duplication, excess production capacity, and price war among enterprises. This high-tech product faces a situation of low price and low profit, which will inevitably lead to low product quality.

2.2 most enterprises are in the entrepreneurial stage, and the enterprise model is backward. Most domestic radiation crosslinked heat shrinkable material enterprises are still in the entrepreneurial stage, and have not implemented the enterprise site, quality and environmental management. Compared with foreign countries, there is still a big gap in the construction of market network resources and international market development of heat shrinkable industry in China.

2.3. There are not many exported products. China's radiation crosslinked heat shrinkable products have been exported to many countries and regions, but the overall sales proportion is low. Some products are exported as parts and sold under brand names, and have not occupied the international market as China's home appliance enterprises.

2.4. Key technologies in some fields need to be breakthrough. Although radiation crosslinked heat shrinkable cable accessories in China occupy more than 90% of the domestic market, they are no longer dependent on imports. However, the national defense (heat shrinkable products that can meet the mil standard), civil (used for sports, entertainment, safety signs) and medical heat shrinkable materials have not yet formed a market, mainly because the key technologies have not been broken through and can not meet the requirements of user enterprise standards.

3. Gap between China's radiation crosslinked heat shrinkable tube manufacturers and international advanced enterprises

The radiation chemical products of Tyco (Raychem's head office) of the United States dominate the world. The radiation crosslinked cable accessories produced by Tyco have been recognized by more than 60 countries in the world. It is dominated by advanced materials, and its products still dominate the market of high-end enterprises in China, such as ships, high-speed rail, nuclear power, aerospace and important power enterprises.

The domestic products are only sold in the middle and low-end markets. The appearance of the heat shrinkable casing still lags far behind that of the products of international advanced enterprises such as Raychem of the United States and Sumitomo of Japan. The root cause is the technological innovation ability of domestic enterprises, the performance of domestic raw materials and the backward technology and equipment adopted. At present, the radiation crosslinked heat shrinkable materials are multiple composite crosslinked polymers, and advanced blending equipment is required. However, due to the limitation of product cost, at present, no enterprise producing radiation crosslinked heat shrinkable tubes in China has adopted high-efficiency continuous mixing units, i.e. busskeader equipment developed by Swiss buss company and LCM and other high-efficiency mixing units developed by American Farrel company.