Disclosed is a profile-extruded multilayer structure comprising a polyester composition comprising from about 0.005 to about 7 mole % of a sulfonic acid comonomer or a salt thereof such as structures comprising at least one polyamide layer and at least one layer of a sulfonic acid-derived copolymer; structures comprising at least one polyester layer and at least one layer of a sulfonic acid-derived copolymer; structures comprising at least one polyamide layer, at least one layer of a sulfonic acid-derived copolymer and at least one polyester or polycarbonate layer. Also disclosed are shaped articles comprising these multilayer structures, commonly referred to as profiles. Such profiles are useful, for example, as tubing.
公开了一种型材挤压多层结构,该结构包含一种聚酯组合物,其中含有约0.005至约7摩尔%的
磺酸共聚物或其盐,例如包含至少一层聚酰胺层和至少一层
磺酸衍生共聚物的结构;包含至少一层聚酯层和至少一层
磺酸衍生共聚物的结构;包含至少一层聚酰胺层、至少一层
磺酸衍生共聚物和至少一层聚酯或聚
碳酸酯层的结构。此外,还公开了由这些多层结构(通常称为型材)组成的异型制品。例如,这种型材可用作管材。