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以乙烯-醋酸乙烯酯共聚物(EVA)边角料、天然橡胶(NR)、相应助剂和填料为主要材料进行共混混炼,再用模压法制备EVA边角料/NR复合发泡材料,研究了模压温度、模压时间和模压压力对复合发泡材料性能的影响.实验结果表明:模压温度为145℃,模压时间为30 min,模压压力为12.5 MPa时,复合发泡材料的综合性能较好.进一步测定了复合发泡材料的表观密度和发泡倍率曲线,以及硬度和撕裂强度曲线.实验数据表明,模压温度可改变复合发泡材料的交联程度,模压时间综合影响复合发泡材料的交联程度和泡孔大小,模压压力则与复合发泡材料泡孔生长有关,影响泡孔分布情况.
EVA scrap, natural rubber (NR), corresponding auxiliaries and fillers were blended and kneaded. EVA scrap / NR composite foams were prepared by compression molding. The effects of molding temperature , Molding time and molding pressure on the properties of the composite foam.The experimental results show that the composite foam performance is better when the molding temperature is 145 ℃, the molding time is 30 min, the molding pressure is 12.5 MPa.Further determination The apparent density and expansion ratio of the composite foaming material as well as the curves of hardness and tear strength.The experimental data show that the molding temperature can change the degree of cross-linking of the composite foaming material, the molding time comprehensively affects the cross-linking of the composite foaming material Degree of connection and the size of the cell, the molding pressure is associated with the foam growth of composite foam material, affecting cell distribution.