选用了4种阻燃材料,对猪皮蓝湿革进行处理,考察阻燃剂种类、用量对皮革燃烧性能、厚度、收缩温度、物理机械性能以及感官性能的影响。革样燃烧性能用氧指数测定试验(ASTM D 2863-77)和垂直燃烧试验(ALCA Method E 50)结果进行表征。结果表明:这4类阻燃剂均能提高革样阻燃性能,并且使革样无焰燃烧时间降低至0s;阻燃剂中引入具有片层结构的蒙脱土,其阻燃性能增加;这4种阻燃材料对革样物理机械性能(收缩温度、抗张强度、撕裂强度以及断裂伸长率)的影响不明显,但革样粒面更平细、紧实,丰满度和柔软感加强。
The precipitated silica matting agent was synthesized by chem-deposit method,sodium silicate and sulfurric acid as raw materials,appending dispersant and surfactant.The optimal parameters for the required precipitated silica with excellent properties are temperature 70～85℃,pH value 9,reaction liquid mass concentration 20%,the calcined temperature between 450～480℃.The result shows that the prepared precipitated silica pore volume is 1.0～1.3cm3/g,the partical size is smaller than 10um,D50 approximately 5um.The surface area is 320～430m2/g,the pore size is between 147～388.
