| 摘要 |
A process for producing a multilayer flat film containing a polyamide layer and a layer of another polymer. The polyamide layer is essentially formed from an intrinsically gel-free, randomly branched polyamide including units derived from: AB monomer possessing both a carboxylic acid group (A) and an amine group (B), at least one compound I, being a carboxylic acid (A<SUB>v</SUB>), with functionality v>=2 or an amine (B<SUB>w</SUB>) with functionality w>=2, and at least one compound II, being a carboxylic acid (Av) with functionality v>=3 or an amine (B<SUB>w</SUB>) with functionality w>=3. When compound II is a carboxylic acid compound I is an amine. When compound II is an amine compound I is a carboxylic acid. The polyamide layer and the layer of the other polymer are adjacent to each other.
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