Conveyor Belt

Adhesive tape industry, the domestic situation and problems of

Although the adhesive tape industry in China has been greater development, but in quality as compared with the advanced countries there are still large gaps, and the uneven development among the various enterprises, mainly in the following six aspects. conveyor belt

1. conveyor belts Varieties of small, incomplete series of specifications. My tape less product variety, size series of incomplete, tape the lack of high-tech is particularly prominent. For a variety of special conveyor belt, the domestic development and the current Although a small amount of production, but standard varieties are few. For the transmission belt, the domestic automotive V belt type of wrapper is currently still mainly trimming proportion of type V belt is also less. XH, XXH other large pitch, 3000mm or larger length of the belt, little can produce.

2. Shorter service life. Domestic standard conveyor transport life of 50 million tons, while developed countries have more than 2 million tons. The design life of the tape outside the general fabric core conveyor belt in five years or more, steel cord conveyor belt for 15 years. Germany, the service life of steel cord conveyor belt has been the record of 20 years, and our life of theSidewall Conveyor Beltproduct is only 8-10 years. Produced by developed countries combine with the V belt life over 1000h, combine with the domestic agricultural V belt life compared with foreign advanced products are also large disparities. Domestic standard automotive V belt life of 30000km, made the timing conveyor system belt and the V-ribbed belts, only some of the products meet OEM matching requirements. Rubber Conveyor Belt

3. A lower grade. Compared with developed countries, domestic-grade tape is also relatively low. On the skeleton of the fabric core conveyor belt material, developed countries have already eliminated the cotton fiber in place of nylon, polyester and aramid, while the output of China’s cotton canvas belt still a considerable proportion. In the fabric structure, the developed countries have gradually from high strength, high-performance straight through the core instead of plain cloth fabric cord fabric core and core, while the domestic straight through the fabric core conveyor belt is just at the exploratory research stage. As the rope conveyor belt with a high strength, elongation is small, into a good groove, dynamic performance, high reliability connectors, suitable for long-distance, large capacity, high efficiency modern transport needs. Developed countries, steel cord conveyor belt production accounts for about 25%, while China accounted for only about 10%. In the V belt products, developed countries have realized the rope structure and the skeleton material of polyester-based, now part of the adoption of a more excellent performance of aramid cord, while the structure of domestic V belt is still the main cord, polyester V Belt V belt cord only about 15% of production. The main body of plastic material on the tape, the use of high-strength plastic materials can extend the coverage of the life of conveyor belt is generally believed that cover the gel strength from 18MPa to 21.6MPa, life can be increased by 20%, while the national standard common type to 14MPa, heavy as 18MPa. Light conveyor belt is a conveyor belt of high precision products, developed countries such as Japan, accounting for conveyor belt conveyor belt light output 15%, since the 80’s row with more than 10% annual growth rate, light conveyor belt has been extensively used thermoplastic elastomer, the United States, light conveyor belt, using thermoplastic elastomer accounts for 90%. V-belt in developed countries has achieved the chloroprene rubber-based, some use of thermoplastic elastomer, domestic V natural rubber and styrene-butadiene rubber band is still dominated. Developed countries, automobile V belt, timing belt, are now using hydrogenated nitrile rubber and other new species.

4. Product standards lag. While the tape product standards in China to actively adopt international standards and foreign advanced standards, but that is only after we have implemented the developed countries to enact, amend, and the domestic system, the revised standards are due to the development of testing methods can not keep up, generally go through two -3 years to implement. Some of product standards, which also some of the technical indicators, national standards lower than the foreign advanced standards.

Five. Exports less. At present, Steel Cord Conveyor Belt production capacity has reached conveyor belt for more than 100 million square meters, but domestic demand is only 6,000 square meters or so, supply exceeds demand. The annual export volume conveyor only about 3% of annual output. V belt and timing belt and other tape products even smaller proportion of exports, export mainly to developing countries in the region. This situation with our tape-producing countries are not proportionate. Tape’s low export volumes reflects from one side of the status quo of China’s product quality tape, which shows that our tape products in the international market, the lack of competitiveness. According to the Australian market to reflect, among the Australian market made it difficult conveyor belt, the reason First, the current China’s high-strength conveyor belt in the heat resistance, difficult to meet the requirements in terms of water seepage, Pipe Conveyor Belt and second, product quality is unstable.

6. Quality checks low passing rate. Fabric core conveyor belt through the ordinary, ordinary V belt, steel cord conveyor belt, automotive V belt, flame-retardant conveyor belt, heat-resistant conveyor belt, timing belt and other tape products of national supervision inspection four times, the National Product Quality Inspection Commission 1, Industry testing seven times, the overall pass rate of 78.4% sample.

Sample involved a total of 194 samples of conveyor type, sampling a pass rate of 77.8%. Conveyor belt products are the main problem is. Adhesion strength between layers, covered by plastic tensile strength and elongation at break, abrasion resistance of rubber covers, etc. 9 technical specifications do not meet standards. Transmission belt products are the main problems is the product of the size of deviation, the middle layer of adhesive strength (or the cord out of the intensity), fatigue life, and several technical indicators do not meet standards. Cold Resistant Conveyor Belt