Molded CHINA EVA FOAM foaming time and temperature on the impact

In theory: Molded time is too short, there mucous membranes, foam timber bottom rupture. The reason is: when the cross-linking time is short, the degree of cross linking is low, foam material mucosa, with the increase in the amount of AC decomposition gas, low cross-linked CHINA EVA FOAM strong to bear the impact of the fracture pressure; if the molding time is too long, the resulting cross linked products through the large bubble material shrinkage occurs.

Tensile strength, elongation at break and the apparent relationship between the total density diagram

The maximum temperature of the kneaded material CHINA EVA FOAM cross-linking reaction of the corresponding half-life of 10 minutes the temperature of the decision, the cross linking temperature will have to consider CHINA EVA FOAM, AC their relationship with the amount of gels, and ultimately to be determined. If the temperature is too high, CHINA EVA FOAM cross linking temperature and AC decomposition rate is too high, resulting in molding time is difficult to control; temperature is too low, resulting AC CHINA EVA FOAM decomposition rate and the cross linking rate are incompatible, the system was less than 65 gel %, a good foam cannot be obtained. Therefore, reducing the molding temperature, the decomposition rate of the AC CHINA EVA FOAM cross linking rate is reduced; molded articles extend time [6].

3 Conclusions

Based on the above aspects of the factors, the best molded foam experimental conditions were: AC blowing agent in an amount of 11 parts of cross linking agent in an amount of 0.5 parts of CHINA EVA FOAM, the foaming temperature of 165 ℃, foaming pressure of 15MPa, foaming time is 15 minutes.