Publish Time: 2022-03-03 Origin: Site
EVA(ethylene-vinyl acetate copolymer) is a commonly used material to manufacture soles and uppers in shoe processing enterprises. The EVA foam sole has good moisture absorption, heat resistance, abrasion resistance, weather resistance, and oil resistance. But it is easy to slip when walking in the wet, and the sole is hard under low-temperature conditions. With the continuous development and progress of the technology of combined use of rubber and plastic, the proper use of natural rubber in EVA soles can significantly improve the problems of EVA soles slipping easily and hardening at low temperatures. It can also improve the durability of rubber soles.
The rational use of natural rubber in EVA soles can significantly improve the overall performance of the soles, but too much natural rubber is not good. The foaming efficiency of EVA foamed soles is closely related to the amount of natural rubber. Difficulty in degassing and uneven foaming, the finished EVA foam bottom shrinkage increases significantly. Under normal circumstances, in the production of EVA-natural rubber foamed soles, the amount of natural rubber should not exceed 20 parts to ensure that the EVA foamed soles are evenly foamed and reduce the shrinkage of the finished product.
Using a small amount of natural rubber in the EVA foam bottom can significantly improve the elasticity and elongation at the break of the foam bottom, and the comfort of the foam bottom is significantly improved.
When using EVA-natural rubber blend materials to prepare foam bottoms, when rubber product manufacturers choose peroxides such as DCP for vulcanization, the physical and mechanical properties of the blend materials are better.
Choosing foaming agent AC foaming can better coordinate vulcanization speed and development. The relationship between the foaming speed can further improve the foaming efficiency and foaming uniformity of the foamed rubber sole.
The combination of rubber and plastic has better performance and lower cost and is currently widely used. The use of a small amount of natural rubber in the EVA foam sole can significantly improve the overall performance of the sole. Cis-butadiene rubber, styrene-butadiene rubber, etc., can also be used in the sole foam formulation with EVA as the primary material. In actual production, rubber product manufacturers need to control the amount of natural rubber and compounding agents in the EVA foam sole formula and reasonably control the vulcanization process and foaming process of the sole according to the processing performance of the rubber and EVA materials.
Dongguan Changying Sponge Products Co., Ltd. specializes in producing EVA shoes and other EVA products. We provide customized services at reasonable prices. Welcome to contact us.
DONGGUAN CHANGYING SPONGE PRODUCTS CO., LTD.
Sophia Chen
Email: sophia@evafoamproducts.com
Whatsapp/Wechat/Cellphone: +86 13717157339