Process for the preparation of a sheet or coil in three layers to be used as a substrate in the manufacture of inductive phone cards and plastic cards in general and plate or coil at threeS layers and process for the preparation of extruded sheet or coil in three layers:

摘要

Process for the preparation of a sheet or coil in three layers to be used as a substrate in the manufacture of phone cards and cards in general and inductive plastic sheet or coil in CAYou 're the layers and process for the preparation of extruded sheet or coil in three layers.The present invention relates to a sheet or coil in three layers to be used as a substrate in the manufacture of inductive phone cards and plastic cards in general.The external layers can be understood only of an ABS resin or an ABS resin and PET resin.The layers of the core include a greater amount of polyester resin or pet resin, and a smaller quantity of ABS resin may contain only pet resin.While the composition of the outer layers containing ABS and polyester have a greater amount of ABS resin, and a smaller quantity of polyester resin or pet.