聚氨酯海绵乱空剂：如何改善泡沫的压缩永久变形？
引言：一块海绵，也有它的“心事”
你有没有遇到过这样的情况？家里的泡棉坐垫用了几年后，一屁股坐下就再也弹不起来；或者小时候用的橡皮擦，时间久了就变得软塌塌、没弹性了。别以为这是它们“老了”，其实这背后有个专业术语——压缩永久变形（compression set）。
对于聚氨酯海绵来说，这个性能指标简直就像体检报告上的“血压”、“血糖”一样重要。如果压缩永久变形太高，那这块海绵就算外表光鲜亮丽，内里也已经“中风”了——压下去就不想起来了
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