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WO2022029276A1 - Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches - Google Patents

Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches Download PDF

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Publication number
WO2022029276A1
WO2022029276A1 PCT/EP2021/071960 EP2021071960W WO2022029276A1 WO 2022029276 A1 WO2022029276 A1 WO 2022029276A1 EP 2021071960 W EP2021071960 W EP 2021071960W WO 2022029276 A1 WO2022029276 A1 WO 2022029276A1
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WO
WIPO (PCT)
Prior art keywords
layer
composite system
resin
fluid
systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2021/071960
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German (de)
English (en)
Inventor
Andreas Bichler
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RelineEurope GmbH
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RelineEurope GmbH
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Filing date
Publication date
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Publication of WO2022029276A1 publication Critical patent/WO2022029276A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/28—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • Lining hose for the rehabilitation of fluid-carrying line systems and multi-layer composite systems Lining hose for the rehabilitation of fluid-carrying line systems and multi-layer composite systems
  • the present invention relates to a liner bag for rehabilitating fluid-carrying systems that operate at pressures in excess of atmospheric pressure.
  • the present invention also relates to a multilayer composite system containing a composite of at least three layers, one of these layers being a barrier layer against monomers, gases or water vapor and this layer being arranged between at least two other layers of the multilayer composite system.
  • Lining tubes for the rehabilitation of fluid-carrying systems containing a multi-layer composite film as the inner film tube are known per se and are described in the literature.
  • EP 3 174 703 relates to the use of seamless inner film hoses in lining hoses for the rehabilitation of fluid-carrying systems which are operated under a pressure which is above atmospheric pressure, the seamless inner film hose preferably having a reinforcement or reinforcement.
  • the liner tubes according to WO 95/04646 usually have an opaque outer protective film, an inner film that is permeable at least for certain wavelength ranges of electromagnetic radiation, and at least one fiber strip impregnated with a hardenable resin, which is arranged between the inner film and the outer film.
  • the outer film tube is intended to prevent the resin used for impregnation from escaping from the fiber tube and entering the environment. This requires a good seal and connection of the outer film tube to the resin-impregnated fiber tube.
  • a lining tube is known from WO 00/73692 A1, comprising an inner film tube, a sliver impregnated with a resin and an outer film tube which is lined with a fiber fleece on its inside (i.e. the side facing the resin-impregnated sliver).
  • resin-impregnated slivers are wound helically and overlapping onto an inner film tube.
  • the outer film tube is then also wound helically and overlapping around the resin-impregnated fiber tube.
  • the inner tube itself is also wound around a mandrel for simplified manufacture.
  • WO 95/04646 discloses that a prefabricated inner film tube can be inflated and itself can serve as a winding mandrel.
  • a prefabricated inner film tube is produced from a film strip whose film edges are connected to one another by welding or gluing to form the inner film tube.
  • Liners are known from WO 99/11966 which contain a fabric tube which is obtained by superimposing two fabrics and connecting them along the longitudinal edge. The fabric is impregnated with a curable resin. The fabric tube also has a filler strip which holds the corners of the fabrics together and which can also be impregnated with curable resin.
  • DE 10 2018 001 598 describes a method for rehabilitating a line carrying a liquid or gaseous medium, in which a layer of resin-impregnated fiber strips wound in an overlapping manner is described formed first liner tube is pulled into the line and then expanded and cured. Any existing inner film tube is removed after curing. A second liner tube is then inserted into the first hardened liner tube by inversion (turning it inside out) and is also expanded and hardened.
  • the second lining tube has a circumferentially closed inner film layer with a fleece layer laminated onto it and is also expanded and hardened after inversion.
  • the second lining hose serves as a coating and is essentially a felt hose or a felt liner with an inner plastic layer about 1 mm thick and a laminated needle felt.
  • the inner film tube is generally removed again, i.e. pulled out, after it has been installed in the fluid-carrying system to be rehabilitated.
  • the object of the present invention was to overcome the disadvantages of the prior art and to provide liner tubes and multi-layer composite systems that can be used for the rehabilitation of fluid-carrying systems that are operated under a pressure that is above atmospheric pressure .
  • the object of the present invention is achieved by
  • the invention relates to the use of a multilayer composite film according to the invention as an inner film tube in a lining tube for the rehabilitation of fluid-carrying systems, which has an inner film tube and at least one sliver impregnated with a resin.
  • the liner tubes of the present invention for the remediation of fluid-carrying systems operating at superatmospheric pressure have an inner tubular composite layer based on an olefin polymer with a reinforcing layer applied thereto and integrally bonded to the olefin polymer, at least one on the Reinforcement layer arranged tubular layer of slivers impregnated with a hardenable resin and optionally at least one further tubular layer on the side of the resin-impregnated slivers, which is opposite the side facing the reinforcement layer, wherein the Vicat softening point of the olefin polymer (measured according to DIN EN ISO 306, Method B50) is at least 10°C below the softening point of the reinforcing layer.
  • the reinforcing layer of the inner tubular layer After curing of the hardenable resin, the reinforcing layer of the inner tubular layer generally has such a connection to the at least one tubular layer of resin-impregnated slivers that non-destructive removal of the inner multilayer layer is no longer possible.
  • line systems of any kind for the transport of liquid or gaseous media are to be understood, which are operated at a pressure that is above atmospheric pressure.
  • Examples include pipelines of all kinds, piping systems for transporting media in chemical plants and production plants, pressurized water pipes and drinking water pipes or sewage systems that are laid underground or not visible.
  • the reinforcement layer forming an integral part of the inner tubular composite layer contains the material for impregnating it with a curable resin soaked slivers absorbs at least part of the resin used and during the subsequent hardening of the resin after introduction of the liner tube into the fluid-carrying system to be rehabilitated, a firm connection is formed between the reinforcement layer and the hardened slivers.
  • the reinforcement layer is also integrally bonded to the inner tubular layer based on an olefin polymer, it is thus achieved overall that the inner tubular composite layer based on an olefin polymer has sufficient stability to withstand the flushing tests and the conditions of regular operation of the to withstand pressurized systems and therefore it is no longer necessary to remove this composite layer after installation and curing.
  • the reinforcing layer is integrally bonded to and together with the olefin polymer forms the composite inner tubular layer of the liner tube. Reinforcement layer and olefin polymer together form a solid bond that can no longer be separated without destroying it.
  • the olefin polymer has a Vicat softening point according to DIN EN ISO 306, method B50 (force 50 N, heating rate 50° C./h ) on, by at least 10°C, preferably at least 15°C and in particular at least 20°C below the softening point of the reinforcing layer.
  • olefin homopolymers or olefin copolymers are suitable as olefin polymers.
  • a first group of preferred polymers are, for example, homo- or copolymers of olefins, in particular of ⁇ -olefins having preferably 2 to 8, in particular 2-6, carbon atoms.
  • Particularly preferred monomers are ethene, propene and octene, the latter also being readily copolymerizable with ethene.
  • Suitable comonomers for the olefins mentioned are, in particular, alkyl acrylates or alkyl methacrylates which are derived from alcohols having 1 to 8 carbon atoms, for example ethanol, butanol or ethylhexanol, to name just a few preferred examples.
  • EPDM rubbers have proven to be advantageous, which, because of their elastic properties, can bring advantages when the lining hose is brought into contact.
  • the olefin polymers can have functional groups.
  • Suitable reactive monomers for introducing suitable functional groups are, for example, maleic acid, maleic anhydride, itaconic acid, (meth)acrylic acid, glycidyl (meth)acrylate and vinyl esters, in particular vinyl acetate, vinylphosphonic acid and esters thereof, and ethylene oxide and acrylonitrile, to name just a few preferred representatives .
  • the proportion of comonomers for introducing the functional groups is generally in the range from 0.1 to 50% by weight, preferably from 0.3 to 30% by weight and particularly preferably from 0.5 to 25% by weight, based on the total weight of the monomer mixture .
  • monomers can be copolymerized with the remaining monomers or with polymers or by processes known per se and described in the literature, for example in the melt or in solution Monomers without functional groups are reacted, for example, grafted.
  • a first preferred group of such polymers with functional groups are copolymers of ethene with ethyl or butyl acrylate and acrylic acid and/or maleic anhydride.
  • Corresponding products are available, for example, from BASF SE under the trade name Lupolen® KR 1270.
  • Ethene/propene copolymers with suitable comonomers for introducing the corresponding functional groups are also suitable. Further, there can be mentioned ethene/octene copolymers grafted with appropriate monomers to introduce functional groups. Fusabond® NM493 D from DuPont should be mentioned here as an example.
  • so-called functionalized EPDM rubbers have proven to be advantageous, which, because of their elastic properties, can bring advantages when the lining hose is brought into contact.
  • Examples are terpolymers of generally at least 30% by weight of ethene, at least 30% by weight of propene and up to 15% by weight of a diene component (usually diolefins having at least 5 carbon atoms such as dicyclopentadiene, 1,4-hexadiene or 5-ethylidene norbornene).
  • Royaltuf® 485 from Crompton may be mentioned here as a commercial product.
  • Suitable materials for the reinforcement layer are in principle all products known to those skilled in the art, in particular in the form of wovens, knitted fabrics, scrims, mats or nonwovens, which can contain fibers in the form of long continuous fibers or short fibers, for example.
  • Appropriate Products are known per se to those skilled in the art and are commercially available in a large variety from different manufacturers.
  • Woven fabrics are generally understood to be flat textile products made from at least two fiber systems crossed at right angles, the so-called warp running in the longitudinal direction and the so-called weft running perpendicularly thereto.
  • Knitted fabrics are generally understood to mean textile products that are produced by knitting.
  • Fiber fabrics are a processing variant of fibers in which the fibers are not woven, but aligned parallel or at an angle to one another and, if necessary, fixed by means of a quilting thread or an adhesive.
  • Fiber fabrics, in particular fiber fabrics with parallel fiber orientation can have a pronounced anisotropy of strength in the direction of orientation and perpendicular to it due to the orientation of the fibers, which can be of interest for some applications.
  • a fleece consists of fibers lying loosely together, which are not yet connected to one another.
  • the strength of a fleece is only based on the fiber's own adhesion, but can be influenced by processing. In order to be able to process and use a fleece, it is usually solidified, for which various methods can be used.
  • Fleeces are different from woven or knitted fabrics, which are characterized by the laying of the individual fibers or threads, which is determined by the manufacturing process.
  • Fleece on the other hand, consists of fibers whose position can only be described using statistical methods. The fibers lie tangled up in the non-woven fabric. The English term non-woven (not woven) therefore clearly distinguishes it from fabrics. Nonwovens are classified according to the fiber material (e.g. the polymer in man-made fibers), the binding process, the type of fiber (staple or endless fibers), the fineness of the fibers and the fiber orientation distinguished. The fibers can be laid down in a defined preferred direction or oriented entirely stochastically, as in the case of random-layer nonwovens.
  • Felts can also be used as reinforcement for the foil that is reinforced on both sides.
  • a felt is a fabric made from a disordered fiber material that is difficult to separate. In principle, felts are therefore non-woven textiles.
  • Felts are usually made from man-made fibers and plant fibers by dry needling (so-called needle felts) or by bonding with water jets escaping from a nozzle bar under high pressure. The individual fibers in the felt are randomly intertwined.
  • Needle felting is mechanically manufactured, typically with numerous barbed needles, the barbs being arranged in the reverse manner of a harpoon. This pushes the fibers into the felt and the needle comes out easily.
  • the fibers are intertwined with one another by repeated puncturing and may then be post-treated chemically or with steam.
  • felts can be produced from practically all natural or synthetic fibers.
  • the fibers can also be entangled with a pulsed water jet or with a binding agent.
  • the latter methods are particularly suitable for fibers without a scale structure, such as polyester or polyamide fibers.
  • Felts have good temperature resistance and are generally moisture-repellent, which can be advantageous when used in liquid-carrying systems.
  • the length of the fibers used in the reinforcement layer is not subject to any particular limitation, ie so-called long fibers as well as short fibers or fiber fragments can be used.
  • the properties of the corresponding products can be adjusted and controlled over a wide range via the length of the fibers used.
  • Fibers used is also not subject to any restrictions.
  • Glass fibers, carbon fibers or plastic fibers such as aramid fibers or fibers made of thermoplastics such as polyesters or polyamides or polyolefins (e.g. polypropylene) are mentioned here only as examples, the properties of which are known to the person skilled in the art and are commercially available in large numbers.
  • Glass fibers are generally preferred for economic reasons; if fibers based on other materials are used, it can be advantageous to use aramid fibers or carbon fibers, which can offer advantages over fibers based on thermoplastics in terms of strength at higher temperatures.
  • Preferred materials for the reinforcing layer are nonwovens based on thermoplastic polymers such as polyesters or polyamides. These preferably have a basis weight in the range from 20 to 500 g/m 2 , preferably in the range from 30 to 300 g/m 2 and in particular in the range from 40 to 250 g/m 2 .
  • the thickness of the reinforcement layer is generally in the range from 10 to 1500 ⁇ m, preferably in the range from 20 to 1000 ⁇ m.
  • the inner tubular composite layer preferably has a thickness in the range from 20 to 2000 ⁇ m, particularly preferably in the range from 30 to 1800 ⁇ m and very particularly preferably in the range from 50 to 1500 ⁇ m.
  • the reinforcing layer In order to achieve a firm connection of the reinforcing layer with the olefin polymer, the reinforcing layer using a suitable connection method such as by lamination, gluing or Lamination or hot melt process applied.
  • a suitable connection method such as by lamination, gluing or Lamination or hot melt process applied.
  • connection methods are known to the person skilled in the art and are described in the literature, so that a detailed description is not necessary at this point. What all suitable connection or joining methods have in common is that the reinforcement layer is built integrally into the surface structure of the layer based on olefin polymers, so that a composite that can no longer be separated non-destructively is formed.
  • the pressure and temperature during the connection are preferably selected such that the maximum temperature reached is above the Vicat softening point of the olefin polymer but below the softening point of the reinforcing layer.
  • the inner tubular composite layer has a barrier layer against monomers, gas or water vapor. This is preferably arranged between two layers based on olefin polymers. One of these layers based on olefin polymers then corresponds to the tubular inner composite layer described above.
  • the olefin polymer-based layer having the reinforcement has an impact strength (Dart Drop Impact Strength measured according to ASTM 1709, Method B) that is higher than the impact strength of the second layer of olefin polymers of the inner tubular composite layer.
  • the inner tubular composite layer of the liner tubes of the present invention is a
  • the multilayer composite systems according to the invention have at least three layers, one of these layers being a barrier layer against monomers, gases or water vapor and this layer being arranged between at least two further layers based on olefin polymers, a reinforcing layer being applied to a first of these further layers and
  • This first additional layer of the multi-layer composite system has an impact strength (Dart Drop Impact Strength according to ASTM 1709, method B) which is higher than the impact strength of a second additional layer of the multi-layer composite system, the second additional layer being arranged on the side of the barrier layer which is the side opposite the barrier layer facing the reinforcement layer.
  • the impact strength of the first further layer is preferably at least 5%, particularly preferably at least 10% higher than the impact strength of the second further layer of the multilayer composite system.
  • the first additional layer contains an elastomer, preferably a polyolefin elastomer, particularly preferably a copolymer of ethene and/or propene and another alpha-olefin having 3 to 8 carbon atoms.
  • an elastomer preferably a polyolefin elastomer, particularly preferably a copolymer of ethene and/or propene and another alpha-olefin having 3 to 8 carbon atoms.
  • Olefin polymers in the multilayer composite systems according to the invention Incidentally, what was said above for the inner tubular composite layer also applies.
  • the multilayer composite systems according to the invention thus have a sandwich-like structure in which a barrier layer is arranged between two layers based on olefin polymers and one of the layers based on olefin polymers has an integral reinforcement.
  • Materials suitable for the barrier layer are in principle all materials that are suitable for reducing or preventing the passage of monomers through the layer or layers of the multilayer composite system, which after installation in the fluid-carrying system to be rehabilitated in contact with the transported fluid medium is or are.
  • impregnable resins containing solvents such as styrene are used, the transported fluid must be prevented from coming into contact with these solvents.
  • the barrier effect of a barrier layer against a certain substance depends directly on the diffusion coefficient of the substance in question, the thickness of the barrier layer and the pressure difference on both sides of the barrier layer. A sufficient blocking effect is achieved when the amount of the substance in question that diffuses through the film within 24 hours does not exceed a predetermined limit value.
  • Relevant limit values for the maximum permissible permeability depend, among other things, on whether the pipe systems to be renovated are systems for transporting food or for transporting drinking water, where very low limit values have to be achieved. The person skilled in the art will therefore select the appropriate barrier layer according to the specified limit values of the application on the basis of his general specialist knowledge.
  • Polyamides which have a good barrier effect against the styrene that is often present as a solvent in the resins used for impregnation, may be mentioned here as just examples of suitable materials for the barrier layer.
  • polyamides are the products of the condensation of one or more aminocarboxylic acids, such as aminocaproic acid, amino-7-heptanoic acid, amino-11-undecanoic acid and amino-12-dodecanoic acid, or one or more lactams, such as caprolactam, Oenantholactam and lauryl lactam and/or one or more salts or mixtures of diamines such as hexamethylenediamine, dodecamethylenediamine, metaxylylenediamine, bis-p(aminocyclohexyl)methane and trimethylhexamethylenediamine with diacids such as isophthalic acid, terephthalic acid, adipic acid, azelaic acid, suberic acid, sebacic acid and dodecanedioic acid to name.
  • aminocarboxylic acids such as aminocaproic acid, amino-7-heptanoic acid, amino-11-undecanoic acid and amino-12-do
  • copolyamides which result from the condensation of at least two alpha, omega-amino carboxylic acids or two lactams or one lactam and one alpha, omega-amino carboxylic acid. Mention may also be made of the copolyamides resulting from the condensation of at least one alpha, omega-aminocarboxylic acid (or a lactam), at least one diamine and at least one dicarboxylic acid.
  • lactams are those which contain 3 to 12 carbon atoms in the main ring and can optionally be substituted. Mention may be made, for example, of ⁇ , ⁇ -dimethylpropriolactam, ⁇ , ⁇ -dimethylpropriolactam, amylolactam, caprolactam, capryllactam and lauryl lactam. Aminoundecanoic acid and aminododecanoic acid may be mentioned as examples of alpha,omega-aminocarboxylic acids.
  • dicarboxylic acids examples include adipic acid, sebacic acid, isophthalic acid, butanedioic acid, 1,4-cyclohexyldicarboxylic acid, terephthalic acid, the sodium or lithium salt of sulfoisophthalic acid, dimeric fatty acids (these dimeric fatty acids have a dimer content of at least 98% and are preferably hydrogenated) and called dodecanedioic acid HOOC-(CH2)IO-COOH.
  • the diamine can be an aliphatic diamine having 6 to 12 carbon atoms or an aryl diamine and/or a saturated cyclic diamine.
  • Examples include hexamethylenediamine, piperazine, tetramethylenediamine, octamethylenediamine, decamethylenediamine, dodecamethylenediamine, 1,5-diaminohexane, 2,2,4-trimethyl-1,6-diaminohexane, diaminepolyols, isophoronediamine (IPD), methylpentamethylenediamine (MPDM), bis(aminocyclohexyl )methane (BACM) and bis(3-methyl-4-aminocyclohexyl)methane (BMACM).
  • IPD isophoronediamine
  • MPDM methylpentamethylenediamine
  • ALM bis(aminocyclohexyl )methane
  • BMACM bis(3-methyl-4-aminocyclohexyl)methane
  • copolyamides are copolymers of caprolactam and lauryl lactam (PA-6/12), copolymers of caprolactam, adipic acid and hexamethylene diamine (PA-6/6.6), copolymers of caprolactam, lauryl lactam, adipic acid and hexamethylene diamine (PA- 6/12/6,6), Copolymers of caprolactam, lauryl lactam, 11-aminoundecanoic acid, azelaic acid and hexamethylenediamine (PA-6/6, 9/11/12), Copolymers of caprolactam, lauryl lactam, 11-aminoundecanoic acid, adipic acid and hexamethylenediamine ( PA-6/6, 6/11/12) and copolymers of lauryl lactam, azelaic acid and hexamethylenediamine (PA-6,9/12).
  • the barrier layer can also be constructed as a copolymer of polyamides and olefin polymers. Copolymers based on polyolefins and polyamides with a good barrier effect against styrene are described, for example, in EP 1 460 109, to which reference is also made here for more details.
  • Suitable copolymers with a good barrier effect against styrene are, for example, made up of ethylene and vinyl monomers such as vinyl alcohol (so-called EVOH copolymers) or vinyl acetate (so-called EVA copolymers).
  • the barrier layer can also be a multilayer composite film or form part of a multilayer composite film.
  • the layer based on olefin polymers, which is in contact with the fluid medium after installation in the system to be sanitized as a composite film made of polyolefins and polyamides.
  • the inner tubular composite layer or the multilayer composite systems are in direct contact via the reinforcing layer with at least one layer of fiber bands impregnated with a curable resin.
  • the person skilled in the art selects the suitable slivers for the liner tubes according to the invention with the aid of his expert knowledge of the properties of the various types of slivers and is thus in an optimal position to provide products adapted to the individual application.
  • the width of the slivers is not subject to any particular restrictions; Slivers with a width of 20 to 150, preferably 30 to 100 and in particular 40 to 80 cm have proven to be suitable for a large number of applications.
  • the thickness of the slivers in the liner tubes according to the invention is also not subject to any particular limitation and is determined by the thickness of the liner tube for the desired application. Thicknesses of the slivers in the range from 0.01 to 1 mm, in particular 0.05 to 0.5 mm, have proven useful in practice.
  • Resins that can be photochemically cured have proven advantageous in a number of applications.
  • the at least one curable resin is an unsaturated polyester resin, a vinyl ester resin or an epoxy resin, wherein the at least one curable resin is photochemically curable and contains a photoinitiator.
  • a photochemically curable resin comprising a photoinitiator
  • a curing of the resin with electromagnetic Radiation especially with UV light possible.
  • electromagnetic Radiation especially with UV light possible.
  • the inner film tube should have little or no extinction or absorption in these wavelength ranges.
  • the extinction or absorption of films is usually characterized by the transparency, i.e. the ability of the film tested to allow electromagnetic waves of the wavelengths tested to pass through (transmission). Depending on the energy, incident photons interact with different components of the material; thus the transparency of a material depends on the frequency of the electromagnetic wave.
  • UV light is also advantageous in order to kill any germs that may be present and to sterilize the lining tube.
  • the epoxy resin is an epoxy resin that can be cured by photochemically initiated cationic polymerization.
  • thermally curable resins which are cured by increasing the temperature (for example steam curing or the like) are also suitable in the context of the present invention.
  • good temperature management is required before installing the liner tubes to avoid premature curing.
  • the liner tube must be stored and processed at temperatures below the temperatures required for curing until cured. Depending on the external conditions, this can cause cooling of the Require liner tubing between fabrication and installation.
  • Unsaturated polyester resins UP resins
  • vinyl ester resins VE resins
  • Suitable reaction resins are known to those skilled in the art and are commercially available in various versions.
  • polybasic unsaturated dicarboxylic acids are esterified with diols to give low molecular weight products which are polymerized during curing, usually with vinyl compounds (particularly styrene) as comonomers to form high molecular weight three-dimensional networks.
  • adipic acid, glutaric acid, phthalic acid, isophthalic acid and terephthalic acid and their reactive derivatives can be used as acid components.
  • Preferred unsaturated acids are maleic acid or its anhydride, fumaric acid and Diels-Alder adducts of maleic anhydride and cyclopentadiene.
  • Preferred diols are ethylene glycol, propanediol, dipropanediol, diethylene glycol, 2,2-dimethyl-1,2-propanediol, 1,4-butanediol, 2,2,4-
  • the comonomers required for crosslinking the UP resins can also be solvents for the low molecular weight oligomers; an example of this is styrene, which is used in many UP resins.
  • suitable comonomers are methyl styrene, vinyl toluene or methyl methacrylate.
  • Bifunctional monomers such as diallyl phthalate or divinylbenzene can also be added.
  • Other components of UP resins such as hardeners, polymerization initiators, accelerators, plasticizers and the like are known to those skilled in the art and are described in the literature, so that further explanations are unnecessary here.
  • Vinyl ester resins also referred to as VE resins
  • VE resins Vinyl ester resins
  • epoxide oligomer which has terminal vinyl ester groups such as acrylate or methacrylate groups and thus reactive double bonds.
  • Crosslinking then takes place in a second step, with styrene usually being used as the solvent and crosslinking agent.
  • the crosslink density of VE resins is generally lower than that of UP resins because there are fewer reactive double bonds.
  • the backbone of the oligomer preferably has aromatic glycidyl ethers of phenols or epoxidized novolaks. These are preferably terminally esterified with (meth)acrylic acid.
  • reaction resins used to saturate the slivers can be cured thermally (usually using peroxide catalysts) or by means of radiation, e.g. by UV light with photoinitiators, as described in EP-A 23634, for example.
  • combination curing with a peroxide initiator used for thermal curing in combination with photoinitiators is also possible and has proven to be advantageous, particularly in the case of large wall thicknesses of the lining tubes.
  • a method for such a combination curing is described in EP-A 1262708, for example.
  • the resin can expediently be thickened, as is described, for example, in WO-A 2006/061129. This increases the viscosity of the resin and improves the handling and winding properties of the related slivers.
  • the lining tubes according to the invention have at least one further tubular layer on the side of the resin-impregnated fiber bands that is opposite the side that faces the tubular composite layer or the multilayer composite system.
  • the at least one additional tubular layer should provide protection from light (to prevent premature and undesired curing prior to installation in the case of photochemical curing) and also prevent the escape of resin from the resin-soaked fiber hoses into the pipe system to be renovated. In the case of line systems to be rehabilitated that are laid underground, this is usually desirable or necessary for reasons of environmental protection. It is also advantageous if the outer film tube offers a certain protection against mechanical damage when the lining tube is drawn into the pipe system to be renovated and roughness in the surface or fractures entail the risk of mechanical damage to the tube.
  • the at least one further tubular layer can also have an antibacterial finish.
  • Suitable materials for such a finish are known per se to those skilled in the art and are described in the literature or are commercially available from various suppliers, so that detailed information is not necessary here.
  • all thermoplastics can be used as the material for the at least one further tubular layer, if necessary taking into account the above-mentioned individual requirements in the individual case.
  • the person skilled in the art will select the appropriate thermoplastic based on the specified requirement profile.
  • Tubular layers as described above as components of the liner tubes according to the invention can be obtained by various methods. Tubular products can thus be obtained directly by extrusion or coextrusion. However, it is also possible to obtain flat foils by bringing their longitudinal edges into contact and connecting these edges in a suitable manner (e.g. by gluing, welding or sewing, to name just a few examples). Corresponding methods are known to the person skilled in the art and are described in the literature.
  • the lining tubes according to the invention can be obtained by processes which are known per se and are described in the literature.
  • the liner tubes of the present invention are obtained by winding slivers of fiber onto or around the inner tubular composite layer with the aid of a mandrel or other suitable device.
  • the liner tube is obtained by winding slivers using a device as described in WO 95/04646.
  • the slivers wound one on top of the other in the liner tubes according to the invention overlap at their edges, for example by 5 to 300 mm.
  • the finished lining hose which can generally be 1 to 1000 m, in particular 30 to 300 m long, is introduced during the actual rehabilitation into the fluid-carrying system (pipe system) to be renovated and inflated there, for example with pressurized water or preferably with air. so that it fits snugly against the inner wall of the fluid-carrying system to be rehabilitated.
  • the resin is cured thermally with hot water or, preferably, with UV light, as described, for example, in EP-A 122 246 and DE-A 198 17 413.
  • the lining hoses according to the invention are suitable for the rehabilitation of pressurized fluid-carrying systems of all types and enable rapid rehabilitation while minimizing the downtime of the systems during which the systems have to be taken out of service. This reduces downtime compared to replacing damaged parts.
  • the lining hoses according to the invention can be used particularly advantageously to rehabilitate systems that are difficult to access for conventional repair or renovation by replacing parts because they are, for example, components of an overall device or because they are laid in the ground. Examples include pipe systems for transporting water or waste water, which are laid underground in cities and municipalities and often under roads or other traffic routes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne une gaine de chemisage pour l'assainissement de systèmes assurant l'acheminement de fluides et qui sont soumis à une pression supérieure à la pression atmosphérique, laquelle comprend une couche tubulaire interne à base de polymère oléfinique sur laquelle est appliquée une couche de renforcement reliée d'un seul tenant au polymère oléfinique, au moins une couche tubulaire disposée sur la couche de renforcement et constituée de bandes de fibres imprégnées d'une résine durcissable, et éventuellement au moins une autre couche tubulaire sur le côté des bandes de fibres imprégnées de résine qui est opposé au côté qui fait face à la couche de renforcement.
PCT/EP2021/071960 2020-08-07 2021-08-05 Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches Ceased WO2022029276A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020120954 2020-08-07
DE102020120954.1 2020-08-07

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WO2022029276A1 true WO2022029276A1 (fr) 2022-02-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4610042A1 (fr) * 2024-02-29 2025-09-03 InnoVance GmbH Manchon de tuyau

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004646A1 (fr) 1993-08-06 1995-02-16 Brandenburger Isoliertechnik Gmbh & Co. Procede de fabrication d'une gaine de chemisage tubulaire
WO1999011966A1 (fr) 1997-09-04 1999-03-11 Texon Uk Limited Revetement utilise pour renover des tuyaux
DE19817413A1 (de) 1998-04-18 1999-10-21 Uv Reline Tec Gmbh & Co Verfahren und Vorrichtung zum Sanieren von Rohrleitungen
WO2000073692A1 (fr) 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire
EP1460109A1 (fr) 2003-03-17 2004-09-22 Atofina Mélanges de polyamide et de polyoléfine à matrice polyamide et contenant des nanocharges
EP2835395A1 (fr) 2013-08-09 2015-02-11 Buergofol GmbH Feuille destinée notamment à être utilisée dans l'assainissement de canaux sans tranchée
WO2016016347A1 (fr) * 2014-07-31 2016-02-04 Sml Verwaltungs Gmbh Chemise destinée à la rénovation de systèmes de conduites de fluides
WO2016096773A1 (fr) * 2014-12-15 2016-06-23 Sml Verwaltungs Gmbh Chemise destinée à la rénovation de systèmes conduisant des fluides

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004646A1 (fr) 1993-08-06 1995-02-16 Brandenburger Isoliertechnik Gmbh & Co. Procede de fabrication d'une gaine de chemisage tubulaire
WO1999011966A1 (fr) 1997-09-04 1999-03-11 Texon Uk Limited Revetement utilise pour renover des tuyaux
DE19817413A1 (de) 1998-04-18 1999-10-21 Uv Reline Tec Gmbh & Co Verfahren und Vorrichtung zum Sanieren von Rohrleitungen
WO2000073692A1 (fr) 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire
EP1460109A1 (fr) 2003-03-17 2004-09-22 Atofina Mélanges de polyamide et de polyoléfine à matrice polyamide et contenant des nanocharges
EP2835395A1 (fr) 2013-08-09 2015-02-11 Buergofol GmbH Feuille destinée notamment à être utilisée dans l'assainissement de canaux sans tranchée
WO2016016347A1 (fr) * 2014-07-31 2016-02-04 Sml Verwaltungs Gmbh Chemise destinée à la rénovation de systèmes de conduites de fluides
EP3174703A1 (fr) 2014-07-31 2017-06-07 SML Verwaltungs GmbH Chemise destinée à la rénovation de systèmes de conduites de fluides
WO2016096773A1 (fr) * 2014-12-15 2016-06-23 Sml Verwaltungs Gmbh Chemise destinée à la rénovation de systèmes conduisant des fluides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4610042A1 (fr) * 2024-02-29 2025-09-03 InnoVance GmbH Manchon de tuyau
EP4610040A1 (fr) * 2024-02-29 2025-09-03 InnoVance GmbH Manchon de tuyau

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