Nevertheless foaming processing of PP is very difficult because of its high crystallinity and poor melt strength.

但由于PP的高结晶性，熔体强度低，其发泡成型较为困难。

youdao

Nevertheless foaming processing of PP is very difficult because of its high crystallinity and poor melt strength.

但由于PP的高结晶性，熔体强度低，其发泡成型较为困难。

youdao