The paper was to develop poly(vinyl-chloride) super-light, cheap and superior foaming sole material. PVC foaming material was modified by NBR(nitrile rubber) and made by the compression molding of one-step chemical foaming, and effects of assistants content on property and bubble structure of foaming material were investigated in the paper. On the base of basic formula, it discussed effects of kinds and content of bubble nucleators on property of foaming materials, and observed and analyzed bubble structure of foaming materials made by different nucleators. It analyzed modification about blowing agent AC and discussed effects of various compound blowing agents on foaming material, and also made comparison in property and bubble structure by different blowing agents. The main works and conclusions were listed as following:1. Main assistants content in foaming material were studied. The result showed that when PVC, NBR, AC, DCP, L, ACR-401 were added 100,40,4, 0.2, 0.2, 11 phr, property of foaming material was superior and density was low namely 0.359/cm3 , which basically met requirements of use of soft PVC foaming material.2. On the base of basic formula, effects of four kinds of bubble nucleators TiO2, G-CaCO3, N-CaCO3 and talc powder on property and bubble structure of foaming materials. The result showed that TiO2, G-CaCO3, N-CaCO3 effectively reduced material density, but talc powder increased it which was unsuitable as a nucleator. When TiO2, G-CaCO3, N-CaCO3 were added 2, 2, 1 phr, density of material made by them was small and property was well. Smaller particle size of nucleators improved property and reduced density more effectively; for the foaming system, smaller particle size N-CaCO3 is best used as a nucleator.3. Based on prior experiments, effects of modification of AC on foaming material were discussed.(1). NaCHO3 and foaming assistants L, Na-L were used as modification... |