| 摘要 |
<p>The present invention provides a high-hardness sponge railroad tie which is a thermoplastic resin foam, wherein the density of the foam is 0.1-0.85, and the hardness of the foam is shore A 70 - shore D 70. The high-hardness sponge resin foam comprises 100 parts by weight of a thermoplastic resin, 5-50 parts by weight of a modified polymer, 5-100 parts by weight of a reinforcing agent, 1-10 parts by weight of a processing aid, 0.1-10 parts by weight of a cross-linking agent, and 0.5-20 parts by weight of a foaming agent.</p> |
