Ten picture take you know China EVA industry development

At the same time, he noted, the potential of residual heat is one of the first, more than five hundred million tons of standard coal, accounts for over 10% of the energy consumption of the whole. Some scientists suggested that China's waste heat quite enough, there is a sufficient scientific basis.

solar photovoltaic webex: ethylene - Vinyl acetate copolymerization resin ( EVA resin) Is the fourth after HDPE, LDPE, LLDPE series vinyl polymer. EVA by ethylene and vinyl acetate ( VA） Two monomers by the tool and reaction, in which the mass fraction of VA in 5% 40%, due to its good performance, the product is widely used for foam materials, functional films, packaging film, injection blow molding products, harmonic agent and adhesive, wire and cable, pv cells encapsulation film and hot melt adhesive, etc.

the performance and vinyl acetate (EVA VA） Content has a lot to do, when the content of VA increases, its resilience, flexibility, bonding, transparency, solubility, stress cracking resistance and impact performance will be improved; Decrease when the content of VA in EVA rigidity, wear resistance and electrical insulation will increase. In general, the VA content in 10% When 20% range for the plastic material, and VA content more than 30% as elastic material.

EVA craft comparison: EVA resin production at home and abroad mainly USES the method of high pressure continuous bulk polymerization process, according to the different used reactor, high pressure method of continuous bulk polymerization process is usually divided into tubular method process and kettle type two kinds. Kettle type polymerization process to produce the VA content less than 40% of EVA, the one-way conversion rate of 10% 20%. Tubular polymerization process, can produce the VA content less than 30% of EVA products, its one-way conversion rate is 25% 35%. Method of tube type of low investment, low energy consumption, low at present is mainly used for bulk VA content of EVA products, such as foaming materials, cable materials, etc. And kettle type method in producing high VA content brands such as photovoltaic (pv), hot melt adhesive products have advantages, it is mainly used for the production of high-end brand products.

EVA resin as the main raw material, has the characteristics of heat insulation, thermal insulation, shockproof, non-absorbent. According to zhuo and information, at present domestic EVA main use for foaming, granulation, etc. The most common, making sole accounted for about 34% of the overall consumption of EVA in China. In the material of EVA resin, VA quality score is in commonly 15% 22%. 2008 years ago, our country is the first big application field of EVA resin foam products, consumption of about occupy more than 60% of the total consumption. In recent years, with the foam market demand is becoming saturated, consumption than shrunk. In 2018, EVA resin in the field of foam products consumption proportion fell to about 34% less.

EVA photovoltaic film demand in downstream demand growth is strong, the global photovoltaic new installed capacity increased by 1 for five years. Seven times, the domestic new installed capacity are growing more rapidly, for five years increase 2. 4 times, and still in the case of a decline in domestic installed capacity in 2018 for the first time.

for photovoltaic encapsulation film EVA required VA content over 28%, mainly by the kettle type production at present. Along with the rapid development of China pv market, EVA solar battery encapsulation film market also got rapid growth. However due to domestic cannot meet the requirements of production level of the product, the domestic market are largely Singapore TPC, Formosa plastics, hanwha, Korea hunan petrochemical enterprises such as occupation, in 2018 China's photovoltaic film 30 of aggregate demand. 8%. According to the European solar industry association forecast, 2018 - Global new pv installed capacity will reach 621 in 2022. 7 gw, therefore the future demand for photovoltaic film will continue to maintain rapid growth.

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