I. General conditions of leaves esterilizaveis for packaging of aqueous solutions in the primary sector of medicine and employment

摘要

The sheet materials comprise a thermoplastic block copolymer of the formula (I) IMAGE in which A is a linear saturated aliphatic polyamide sequence, formed from a lactam or an amino acid having a hydrocarbon chain of 4 to 14 carbon atoms or from an aliphatic dicarboxylic acid containing 6 to 12 carbon atoms and a diamine containing 6 to 9 carbon atoms, in the presence of an aliphatic dicarboxylic acid having 4 to 20 carbon atoms which limit the chain length, the polyamide having a mean molecular weight of between 300 and 15 000; B is a polyoxyalkylene sequence, formed from linear or branched aliphatic polyoxyalkylene glycols, mixtures or copolyether derivatives thereof, the polyoxyalkylene glycols having a mean molecular weight of 6000; and n is the number of recurring polymer units and is sufficiently large that the polyether- ester-amide block copolymer has an intrinsic viscosity of from 0.8 to 2.05. The sheet materials are used in composite films in which a layer of the sheet material of the block copolymer of the formula (I) is arranged on both sides of a layer of another thermoplastic material, and which are used to produce primary packing for aqueous solutions in the medical field.