Sumitomo EVA is an ethylene vinyl acetate copolymer produced by Sumitomo Chemical Company in Japan. The following is a detailed introduction about it:

Production Technology

Unique dual reactor system: Sumitomo Chemical's EVA production process uses a dual reactor system, which is the key to its technology. Compared with other single reactor systems, the dual reactor system can make the reaction conditions milder, greatly improving the stability of the production process and reducing the number of unplanned shutdowns caused by "decomposition" phenomena. There is data indicating that using Sumitomo's process, factories can operate for decades without experiencing decomposition.

Efficient and energy-saving: This process not only improves production stability, but also performs well in reducing costs. The dual reactor system significantly reduces the consumption of raw materials and energy, while the overall investment cost is also reduced due to the reduced capacity requirements for ultra-high pressure equipment.

Product Features

Good physical properties: high impact resistance, high strength, and good toughness, moderate density, easy to process and shape, can be processed through various molding methods such as injection molding, extrusion, blown film, etc., to meet the needs of different fields.

Excellent chemical stability: good water resistance, with a closed cell structure, non absorbent and moisture-proof; Can resist the erosion of chemicals such as seawater, oil, acid, alkali, etc; Good aging resistance and ozone resistance.

Good thermal performance: It has high heat sealing, thermal stability, excellent insulation, heat preservation, and low-temperature performance, and can withstand severe cold and exposure to sunlight.

Other characteristics: non-toxic, odorless, pollution-free, in line with environmental protection requirements; High resilience and tensile strength, with excellent shock resistance and buffering performance; Good sound insulation effect, exhibiting good fluidity and plasticity during the processing.

Main models and applications

KA-10: VA content is between 19% and 28%. Due to its high molecular weight, cold resistance and good fluidity, it is widely used in foam products, such as foam plastic slippers, sandals, building materials, etc; Also used for injection molded products, such as industrial components, female shoe soles, etc; It can also be used as a hot melt adhesive in fields such as wood processing, as well as for coating various substrates such as wood, bricks, and concrete.

KC-10: VA content of 28%, melt flow rate of 150g/10min, density of 0.95g/cm ³, mainly used for hot melt bonding, such as book binding and other fields.

SWA110： It has excellent physical properties such as high impact resistance, high strength, and good toughness, moderate density, easy processing and molding, and can be used in various molding methods such as injection molding, extrusion, blown film, etc. It also has good water resistance, corrosion resistance, thermal insulation, sound insulation, etc., and is suitable for household appliances and other fields.

H2201： It has rubber like softness and flexibility, good clarity and gloss, good low-temperature toughness, stress cracking resistance, hot melt adhesive waterproof performance, and UV radiation resistance. It can be used in situations where high material flexibility and weather resistance are required.

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