探讨了有机物 PP改善磷酸铝砂抗湿性的机理 ,认为在稍高于软化点的温度下加热固化 ,可使有机物 PP包裹在砂粒表面 ,在一定程度上阻止了水分子进攻阳离子与“O—”之间的化学键 ,结果使磷酸铝砂的抗湿性大大提高。 The mechanism of PP improving the moisture resistance of aluminum phosphate sand was discussed. It is considered that the heating and curing at a temperature just above the softening point can cause the organic matter PP to wrap on the surface of the sand, which to a certain extent prevents the water molecule from attacking the cation and the “O-” Between the chemical bonds, resulting in aluminum phosphate sand greatly improved moisture resistance.