对柔性海绵和膨胀多孔橡胶产品进行分类。制造过程中使用的基材可以是天然橡胶、再生橡胶或合成橡胶，可以单独使用，也可以组合使用。不适用于乳胶泡沫橡胶、鞋底胶、硬质泡沫橡胶、半硬质聚氨酯泡沫、PVC或与其他聚合物混合的PVC。所有产品均为片状。

Classifies flexible sponge and expanded cellular rubber products. Base material used in their manufacture may be natural rubber, reclaimed rubber or synthetic rubber, either alone or in combination. Does not apply to latex foam rubbers, shoe soling, ebonite cellular rubbers, semi-rigid urethane foams, PVC or PVC blended with other polymers. All products are in the form of sheeting.