Thus the apparent overall density of products is small, but with the increase in the amount of blowing agent, gas evolution increase, AC decomposition rate increases, CHINA EVA FOAM is greater than cross linking rate, the gas escape the melt was gradually increased, resulting in an apparent overall density products gradually increased. When the AC amount of 11 parts by weight, the apparent total density of smaller products.

Figure 4 AC dosage of the elongation at break

(CHINA EVA FOAM = 0.5)

Figure 5 AC dosages on the tensile strength

(CHINA EVA FOAM = 0.5)

In Figure 4, the elongation at break of the first products with the increasing amount of AC decreases and then increases. The reason is: when the AC volume is small, AC CHINA EVA FOAM decomposition rate and the cross linking rate to adapt, the elongation products so large AC = 11; with the AC increases, the decomposition rate is also increased, the gas in the melt is not sufficiently expanded, so the products of the toughness reduced, but not the full expansion of the gas due to the products of the skin cannot be ignored, even more than the above-mentioned factors, and thus the performance of the toughness increases, so When the amount exceeds 15 parts of AC, the elongation at break increases.

Figure 5 shows that, with the AC dosage increases, the tensile strength tended to increase, there is a reason for this phenomenon: In this interval AC decomposition rate and the CHINA EVA FOAM cross linking rate to adapt, it products Apparent total density minimum, but this time the crust a great influence on the tensile strength, but to make the tensile strength increased. Taking into account the apparent overall density products, tensile strength and elongation of three factors (Figure 6), AC 11 parts take appropriate.