A fibrous material or composite including a plurality of layers joined to one another, for example, by needlepunching, is disclosed. The fibrous composite generally has an asymmetrical stretch profile, such that the fibrous composite is more extensible in the cross-machine direction than in the machine direction. The fibrous composite may find particular use in forming a cure-in-place pipe liner.

The invention provides methods and apparatus for producing a spirally wound pipe or pipe liner, and also to a web for forming a spirally wound pipe or pipe liner. One aspect of the invention provides a method and an associated machine of winding a helically wound pipe from a web (200) having transversely spaced apart connecting formations (310, 320) adapted to interlock when the web is wound in a helical path and adjacent edge portions (300a. 300b) of the web overlap one another, wherein an exterior support means (400) for the connecting formation at the terminus of the pipe being helically wound from the web is provided, and a radially outwardly directed force is applied against an inner face (220) of the web and the support means (400) to pinch connecting formations into interlocking engagement. A further aspect of the invention provides an elongated web (200) comprising a wall portion (210) bound by edge portions (300a. 300b) and adapted to form a pipe by spirally winding said web and joining adjacent said edge portions, wherein a distal end of joined edge portions (330) of the web projecting from the wall portion (210) of the web is less than a spacing distance defined by a spacer rib (350) projecting from the wall portion, when the web is spirally wound and adjacent edge portions are joined together.

A multilayer flexible tube includes an inner layer including a melt processable fluoropolymer, wherein the fluoropolymer includes a copolymer of a poly vinylidene fluoride (PVDF) and a hexafluoropropylene (HFP); and an outer layer including a melt processable polymer having a shore hardness less than a shore hardness of the inner layer, wherein the multilayer flexible tube has a maximum storage modulus of at least 300 MegaPascal (MPa) at a temperature of about 10 C.

The present invention relates to a method for rehabilitating lines, in particular sewers, shafts or the like, a curing device being activated or having been activated for curing the curable and/or curing ply, and an advancement of the curing device in the lining sleeve and in particular the power output of the curing device being controlled in an open-loop or closed-loop manner in dependence on the temperature sensed by the temperature measuring device on the outer side of the curable ply.

The present invention relates to a system for curing a lining sleeve comprising a curing device with a radiation source, a lining sleeve with a curable ply and an outer film arranged around the curable ply, a measuring device, which is arranged between the curable ply and the outer film and/or on or at a distance outwardly from the outer side of the curable ply, the measuring device being designed and set up to sense a measured value representative of the curing of the curable ply, and also an open-loop or closed-loop control device, which is designed and set up to control the advancement of the curing device in the lining sleeve and/or the power output of the radiation source of the curing device in an open-loop or closed-loop manner in dependence on the measured values sensed by the measuring device on the outer side of the curable ply.

The present invention relates to a device for curing resin-impregnated lining tubes using high-energy radiation, comprising at least two radiation sources for generating high-energy radiation, wherein the device has a front end, a rear end, two oppositely situated side ends, a top end, and a bottom end, wherein a length of the device from the front end to the rear end is smaller in a transport state than in an operating state. At least one element of the device is foldably, displaceably, rotatably, and/or movably supported, and at least one first radiation source is situated farther from at least one additional radiation source in the operating state than in the transport state. The device includes a fastening point on which a tensile force can act, in particular in the longitudinal direction of the device in order to transfer the device from the transport state into the operating state.

The present invention relates to an apparatus for curing resin-impregnated tubular liners by means of high-energy radiation, comprising at least two radiation sources for producing high-energy radiation, wherein the apparatus has a front end, a rear end opposite the front end, two opposite side ends, an upper end and a lower end opposite the upper end, wherein a length of the apparatus, measured from the front end to the rear end, a width of the apparatus, measured from a side end to the opposite side end, and/or a height of the apparatus, measured from the lower into the upper end, is smaller in a transport state than in an operating state, in that at least one element of the apparatus is mounted such that the element can be folded out, displaced, rotated, and/or moved, and wherein at least one further radiation source is arranged to be spaced further apart from at least one further radiation source when in the operating state than in the transport state. The invention further relates to a use of such an apparatus.

Disclosed herein are exemplary embodiments of linings, liners, and methods of providing a liner or lining for a tank. An exemplary embodiment includes a method of providing a liner or lining for a tank. In this exemplary embodiment, the method includes extrusion welding a pair of sheets together by infusing a molten thermoplastic material along an interface and within a gap between the pair of sheets. The method also includes extrusion welding the pair of sheets to a bottom sheet by infusing the molten thermoplastic material along and between the pair of sheets and the bottom sheet.

The invention relates to a multilayer tube, comprising a tubular inner film made of modified polytetrafluoroethylene, and one or more layers of a planar textile fibrous material, which is saturated with a curable resin, and optionally an outer film. The outer film is preferably made of UV impermeable material. The multilayer tube can be used for repairing pipes, but it can also be used as a stand-alone pipe for transporting fluids such as liquids and gases.

Method and apparatus for producing a liner hose (30) for lining channels and pipes, comprising a circumferentially closed inner film hose (32) and at least on fibrous strip (34) wound onto the inner film hose (32) and impregnated with a curable reaction resin, wherein the inner film hose (32) is drawn in a winding apparatus (40) onto a support tube (8) which is mounted on one side and arranged substantially horizontally, at the free end (10) of which a winding mandrel (12) is arranged having a transport apparatus (16) which, during the circumferential winding of the fiber strips (34), transports the inner film hose (32) in a feed direction (36) to a stationary supporting surface (18) which is arranged at the free end (10) of the winding mandrel (12) and over which the liner hose (30) is conveyed further, wherein the inner film hose (32) is drawn over the free end (13) of the winding mandrel (12) onto the support tube (8) against the feed direction (36).