The disclosure relates to a biaxially oriented pipe made of a polymer composition comprising a propylene-based polymer, wherein the pipe is made by a process comprising the steps of: •a) forming the polymer composition having a melting temperature Tm (° C.) into a tube, •b) heating the tube such that the tube has a drawing temperature Td (° C.) and •c) stretching the tube of step a) in the axial direction and in the peripheral direction at Td to obtain the biaxially oriented pipe, wherein Td is equal to or higher than Tm, wherein •i) the propylene-based polymer comprises (A1) a heterophasic propylene copolymer, wherein the heterophasic propylene copolymer consists of (a1) a propylene-based matrix, wherein the propylene-based matrix consists of a propylene homopolymer and/or a propylene copolymer consisting of at least 70 wt % of propylene monomer units and at most 30 wt % of ethylene and/or α-olefin monomer units, based on the total weight of the propylene-based matrix and (a2) a dispersed ethylene-α-olefin copolymer, wherein the sum of the total amount of propylene-based matrix and total amount of the dispersed ethylene-α-olefin copolymer in the heterophasic propylene copolymer is 100 wt %, wherein the amount of (a2) with respect to the propylene-based polymer is 2.0 to 30 wt % or ii) the propylene-based polymer comprises (B) a random copolymer of propylene and a comonomer which is ethylene and/or an α-olefin having 4 to 10 carbon atoms, wherein when the pipe has an outer diameter of less than 40 mm, the propylene-based polymer comprising (B) has a comonomer content of 0.1 to 3.8 wt % based on the propylene-based polymer.

An interpolymer product comprising: a first ethylene interpolymer comprising ethylene and an α-olefin having a weight-average molecular weight (M.sub.w) of greater than 250,000 and a density of less than 0.930 g/cm.sup.3, and a second ethylene interpolymer comprising ethylene and an α-olefin wherein the second ethylene interpolymer comprises a M.sub.w of less than 70,000 and a density of greater than 0.930 g/cm.sup.3; and wherein the interpolymer product comprises an environmental stress crack resistance (ESCR), measured according to ASTM D1693, Condition B, 10% IGEPAL CO-630, of greater than 90 hours. The interpolymer product may be manufactured in a continuous solution polymerization process utilizing at least two reactors employing at least one single site catalyst formulation and at least one heterogeneous catalyst formulation.

The present disclosure provides a separator-integrated gasket and a manufacturing method therefor, with which the likelihood of the gasket peeling away from the separator can be reduced while reducing the number of manufacturing steps. The separator-integrated gasket includes gaskets 210, 220 that are provided integrally with a separator 200 forming a fuel cell, wherein the separator 200 is formed from carbon to which a thermoplastic first resin material has been added, and the gaskets 210, 220 are formed from a thermoplastic second resin material that is compatible with the first resin material.

The present invention provides a multilayer stretch film comprising at least one core layer arranged between two exterior layers, wherein the thickness of the film is in the range of 5-40 μm, and wherein the film comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 90% by weight based on the total weight of the film.

A method of manufacturing an armour layer of a flexible pipe for transporting fluid from a subsea location and apparatus are provided. The method comprises winding a first length of composite tape to form a first section of the armour layer and positioning an end region of the first length of composite tape over an end region of a second length of composite tape to form an overlapping tape section. Heat and pressure is applied to the overlapping tape section to form a joined overlapping tape section in which the first length of tape is joined to the second length of tape such that the joined overlapping tape section has a lap shear strength of at least 11 MPa. The joined overlapping tape section and the second length of composite tape are wound to form a second section of the armour layer.

A method of manufacturing an armour layer of a flexible pipe for transporting fluid from a subsea location and apparatus are provided. The method comprises winding a first length of composite tape to form a first section of the armour layer and positioning an end region of the first length of composite tape over an end region of a second length of composite tape to form an overlapping tape section. Heat and pressure is applied to the overlapping tape section to form a joined overlapping tape section in which the first length of tape is joined to the second length of tape such that the joined overlapping tape section has a lap shear strength of at least 11 MPa. The joined overlapping tape section and the second length of composite tape are wound to form a second section of the armour layer.

A method of making laminate foam material is provided. The laminate foam material includes a layer of non-foam material sandwiched between two layers of foam material. The non-foam material is bonded to the foam material, such as with a bonding agent and/or by heating respective surfaces of the foam material until the surface softens or melts. When a heating process is utilized, the non-foam material is pressed against the softened or melted foam material. As the foam material begins to cool, the non-foam material becomes bonded to the foam material. The non-foam material is narrower than the foam material and is positioned relative to the foam material such that the edges of the non-foam material are concealed by the foam material. Foam products, such as foam mats, can be formed from the laminate foam material by cutting across the width of the foam material.

A method of making laminate foam material is provided. The laminate foam material includes a layer of non-foam material sandwiched between two layers of foam material. The non-foam material is bonded to the foam material, such as with a bonding agent and/or by heating respective surfaces of the foam material until the surface softens or melts. When a heating process is utilized, the non-foam material is pressed against the softened or melted foam material. As the foam material begins to cool, the non-foam material becomes bonded to the foam material. The non-foam material is narrower than the foam material and is positioned relative to the foam material such that the edges of the non-foam material are concealed by the foam material. Foam products, such as foam mats, can be formed from the laminate foam material by cutting across the width of the foam material.

There is provided a method of making a curved barrier film, including: depositing a barrier layer between a first organic layer and a second organic layer to form a barrier film; and thermoforming or vacuum-forming the barrier film from a flat barrier film to a curved barrier film; wherein the barrier film includes the barrier layer having two opposing major surfaces, wherein the barrier layer includes buckling deformations and non-buckling regions; the first organic layer in direct contact with one of the opposing major surfaces of the barrier layer; and the second organic layer in direct contact with the other of the opposing major surfaces of the barrier layer.

A method of welding/joining corrugated pipe segments, an apparatus configured to weld/join corrugated pipe segments, and a method of circulating water are disclosed. The method of welding/joining corrugated pipe segments includes holding or securing an end of each of the corrugated pipe segments with a jig, and welding the ends of the corrugated pipe segments together. The jig includes at least two rings, each configured to receive one of the ends of the corrugated pipe segments, and a brace or connector connected to each of the two rings. The apparatus includes the jig, a welding ring configured to receive the ends of the corrugated pipe segments, a resistive heating coil for heating the welding ring, and a control circuit configured to control a temperature of the resistive heating coil and maintain the temperature of the resistive heating coil once a target temperature is reached.