Abstract: The invention relates to a multilayered plastic tube for use in automotive airbrake systems comprising an outer layer and an inner layer, and optionally at least one intermediate layer positioned between the inner and outer layer, wherein at least one layer of the inner layer and the optional intermediate layer or layers consists of a thermoplastic polymer composition having a flexural modulus in the range of 1000-2300 MPa and comprising a semicrystalline polyamide and/or polyester polymer having a melting temperature of at least 1800 C., and wherein the outer layer and any other remaining layer consist of a copolyester elastomer composition and/or copolyamide elastomer composition.

Abstract: The invention relates to Polymer composition comprising at least 50 wt. % of a copolyester elastomer and at least 0.7 wt. % of a grease, an oil and/or a wax component, relative to the total weight of the polymer composition. The invention also relates to a plastic tube comprising at least an outer surface layer consisting of said polymer composition, and an automotive brake system, comprising a stretched plastic tube comprising the said plastic tube and a hose fitting inserted into an end-part of the said plastic tube.

Abstract: The invention relates to a multilayered plastic tube for use in automotive airbrake systems comprising an outer layer and an inner layer, and optionally at least one intermediate layer positioned between the inner and outer layer, wherein at least one layer of the inner layer and the optional intermediate layer or layers consists of a thermoplastic polymer composition having a flexural modulus in the range of 1000-2300 MPa and comprising a semicrystalline polyamide and/or polyester polymer having a melting temperature of at least 1800C, and wherein the outer layer and any other remaining layer consist of a copolyester elastomer composition and/or copolyamide elastomer composition.