| 摘要 |
The synthetic coating for the textile substrate consists of a thin film of coagulated polyamide with an open, asymmetrical microporous structure, comprising a first layer in direct contact with said substrate, having large, elongated pores extending transversely to the surface of said film and issuing upon the textile substrate, and a second layer with small, open ovoid pores communicating with both the elongated pores and the surface of the coagulated film.
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