EP3175163A1

EP3175163A1 - Tubular, photochemically curable liners for rehabilitating fluid-bearing systems

Info

Publication number: EP3175163A1
Application number: EP15744217.9A
Authority: EP
Inventors: Stefan Reichel; Christian Noll
Original assignee: SML Verwaltungs GmbH
Current assignee: SML Verwaltungs GmbH
Priority date: 2014-07-31
Filing date: 2015-07-29
Publication date: 2017-06-07
Also published as: US20170268713A1; WO2016016346A1; JP2017523924A; DE102014110928A1

Abstract

Tubular liner for rehabilitating fluid-bearing systems, comprising a) at least one inner tubular film based on a thermoplastic, b) at least one outer tubular film based on a thermoplastic, and c) at least one fibre tube impregnated with a photochemically curable resin between at least one inner and at least one outer tubular film, where an outer tubular film in contact with at least one fibre tube impregnated with a photochemically curable resin has, on the surface facing the fibre tube in the installed state, functional groups which enter into a reaction with the fibre tube.

Description

description

Photochemically curable lining hoses for refurbishing fluid-carrying systems

The present invention relates to photochemically curable

Lining hoses for refurbishing fluid-carrying systems of leading tubes from at least one inner foil tube, at least one outer foil tube, and between them a fiber tube impregnated with a photochemically hardenable resin. Another aspect of the present invention relates to a method of making such a lining tube.

A particularly elegant method for the rehabilitation of fluid-carrying

Systems, especially channels and similar piping systems, is to use a flexible, impregnated with reaction resin

Fiber tube, which serves as a liner tube, introduces into the channel, inflates there so that it snugly fits the channel inner wall, and then hardens the resin.

The preparation of such a lining tube is

for example described in WO 95/04646. It is on a winding mandrel, which consists of several parallel, in their distance to

Winding mandrel changeable winding fingers consists, initially wound a film strip helically, wherein serving as a protective film inner film tube is formed. On this at least one resin-impregnated sliver wound obliquely and in turn a second film strip, which forms the outer film tube.

The outer film tube is intended to prevent the resin used for impregnation from leaking out of the fiber tube and entering the environment. This requires a good tightness and connection of the outer film tube to the resin-impregnated fiber tube.

In order to improve this connection is according to the teaching of the EP

1 180225 the outer film laminated in a structure according to WO 95/04646 with a nonwoven layer, which should improve the connection of the outer film to the resin-impregnated fiber tube. Nonwoven laminated films are However, consuming in the production and the achieved connection effect is not fully satisfactory.

In DE 10 201 1 105 995 lining hoses with a minimum of three-layer structure with at least one inner

Foil tube, at least one resin-impregnated fiber tube and described at least one outer foil tube, wherein the inner foil tube, which is in contact with a soaked fiber tube, on the in the installed state of this fiber tube

facing surface having functional groups that undergo a reaction with the fiber tube. This is intended to improve the connection of the inner film to the resin-impregnated fiber hose so that it no longer has to be removed after installation and curing of the fiber hose. The outer film used is an optionally fleece-laminated film.

The present invention was therefore based on the object

To provide photochemically curable lining hoses for the rehabilitation of fluid-carrying systems that do not have the disadvantages described above.

This object has been achieved by

Lining hoses for the refurbishment of fluid carrying systems with at least one inner foil hose based on a

thermoplastic, at least one outer film tube based on a thermoplastic material and

one impregnated with a photochemically curable resin

Fiber tube between an inner and an outer

Foil tube, wherein the outer foil tube, with a

resin-impregnated fiber hose is in contact on the surface facing the fiber tube in the installed state has functional groups that undergo a reaction with the fiber tube.

Another aspect of the invention relates to a method for producing the lining hoses according to the invention and the use of the lining hoses according to the invention for the rehabilitation of

fluid-carrying piping systems. As a fluid is generally referred to a medium which does not resist any slow shear shear resistance. Of the

superordinate term fluid refers to gases and liquids, since most physical set for both aggregate states

alike, and many of the properties differ only quantitatively but not qualitatively.

[001 1] Only as an example, as a fluid-carrying piping systems drinking water and supply water lines (piping systems with which water is transported from storage or from the place of production to use or caching), fluid-carrying lines of any kind in industrial environments in factories or production plants or sewage systems any Type (eg channels or sewage collectors or the like.).

The fluid-carrying piping systems may be so-called. Freispiegelleitungssysteme or pressurized piping systems, e.g. Pressurized water lines, gas lines or the like.

As Freispiegelleitung (in tunnel form and Freispiegelstollen or

Mirror lugs) is usually a pipe or a portion of such, referred to in the water or a fluid medium according to the law of gravity passes from a higher starting point to a lower end point, wherein the cross section of the line or the line section in is usually not fully flowed through, so that in contrast to a pressure pipe usually a free liquid surface remains. The line is thus not completely filled by the liquid, but it remains an air volume which begins at the upper end of the free-flow line and, depending on pressure and gas solubility, extends more or less far down. Since the fluid medium is conveyed in a gravity pipe only by gravity, free-flowing pipes are sometimes called

Called gravity lines.

The outer film tube with functional groups can be prepared in principle by any known to those skilled in the art. For example, it is possible to use prefabricated seamless tubes or hoses that by attaching the longitudinal edges of flat films and appropriate connection of the brought-in edges z. B. be obtained by gluing or welding or by applying a film strip. Finally, as a suitable method for producing the outer tubular film with functional groups, a winding process can be used in which a film strip as described for example in WO 95/04646, wound. In principle, all processes have the same characteristics and the person skilled in the art, taking into account the current application situation, will choose the most suitable process on the basis of his specialist knowledge.

The nature of the introduction of the functional groups in the outer

Film tube is not subject to any limitation and it can in principle be used all methods which are known in the art and described in the literature. The only requirement is that the functional groups are present on the surface as long as required for the reaction with the fiber tube and preferably with the fiber material or in particular with the photochemically curable resin. Insofar as the reaction takes place only during curing (which has proven to be advantageous in some cases), this requires a corresponding stability of the functional groups, since the

lining hoses according to the invention are usually prefabricated and can be several weeks or even months between production and curing in the system to be rehabilitated. A

Reaction only during curing has the advantage that during installation and installation of the lining hose to the wall of the system to be rehabilitated no or little interaction between the outer film and the fiber tube are expected to have a detrimental effect and, for example, wrinkles or similar problems being able to lead.

Suitable functional groups are, for example, carboxylic acid,

Carboxylic acid anhydride, carboxylic acid ester, carboxylic acid amide,

Carbonsäureimid-, amino, hydroxyl, epoxy, urethane and

Oxazoline groups, to name but a few preferred representatives. Particular preference is given to carboxylic acid, carboxylic anhydride or epoxide groups.

These can be obtained by copolymerization of appropriate monomers with other monomers from which the outer film-forming polymers are prepared or by joint use of polymers without functional groups with polymers having functional groups, preferably via the melt or by coextrusion.

For a reaction to take place between the functional groups of the outer film and the resin, the functional groups must be accessible on the side of the outer film which, when installed, faces the resin-impregnated fiber hose, i. be present on this surface. Composite films of polyolefins and polyamides, in which the fiber tube side facing having no functional (carboxamide) groups and as in the literature in corresponding photochemically curable systems already to

Use as inner film have been described, meet these

Prerequisites usually not.

Suitable reactive monomers for the introduction of suitable

functional groups are, for example, maleic acid,

Maleic anhydride, itaconic acid, (meth) acrylic acid and

Glycidyl (meth) acrylate and vinyl esters, in particular vinyl acetate,

Vinylphosphonic acid and its esters, 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 of 0.1 to 50, preferably from 0.3 to 30 and particularly preferably from 0.5 to 25 wt.%, Based on the total weight of the monomer mixture ,

These monomers may be prepared by methods known per se and described in the literature, e.g. copolymerized in the melt or in solution with the remaining monomers or with polymers or

Reacted monomers without functional groups eg grafted. In the grafting the corresponding monomers are reacted with an already formed polymer backbone.

Corresponding methods are known in the art and in the

Literature described, so that spare here more details.

Below are some preferred groups of polymers something

but the invention is not limited to these groups of polymers.

Structure and structure of the outer film are not subject to any special

Limitations on monomer selection. When an irradiation-curable resin is used in the fiber tube, it is preferable to use outer films which are opaque to the light used for irradiation. Thus, an improved protection against premature curing is achieved, which may occur by exposure to light during storage of the lining hoses prior to installation. As for irradiation usually UV light with

Wavelengths in the range of 300 to 500 nm, preferably in the range of 350 to 450 nm is used, should the outer film in these wavelength ranges have a high absorbance.

The extinction or absorption of films is usually characterized by the transparency i. the ability of the examined film,

electromagnetic waves of the wavelengths studied

let through (transmission). Depending on the energy, incident photons interact with different constituents of the material, so the transparency of a material is dependent on the frequency of the electromagnetic wave.

A first group of preferred polymers are, for example, homo- or copolymers of olefins, in particular α-olefins having preferably 2 to 8, in particular 2-6 C-atoms. Particularly preferred monomers are ethene, propene and octene, the latter also being readily copolymerizable with ethene.

As comonomers for the mentioned olefins come in particular

Alkyl acrylates or alkyl methacrylates, which are derived from alcohols having 1 to 8 carbon atoms, for example, ethanol, butanol or ethyl hexanol, only a few into consideration preferred examples. With these, corresponding reactive comonomers can then be copolymerized to introduce the above-mentioned functional groups.

A first preferred group of such polymers having 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 tradename Lupolen ^® KR 1270th

Ethene / propene copolymers with suitable comonomers for

Incorporation of the corresponding functional groups are suitable.

Further may be mentioned ethene / octene copolymers, with

corresponding monomers are grafted to introduce functional groups. Exemplary Fusabond ^® should be mentioned NM493 D from. DuPont here.

In some cases, so-called functionalized EPDM rubbers have proven advantageous because of their elastic

Features Benefits of installing the

Lining hose can bring with it. Examples include terpolymers of usually at least 30% by weight of ethene, at least 30% by weight of propene and up to 15% by weight.

Diene component (usually diolefins having at least 5 carbon atoms such as dicyclopentadiene, 1, 4-hexadiene or 5-Ethylidennorbornen) called. Here is mentioned as a commercial product Royaltuf ^® 485 of the company. Crompton.

Suitable polymers are furthermore those of vinylaromatic

Monomers and dienes, for example styrene and dienes, where the dienes may be completely or partially hydrogenated, having the corresponding functional groups. Such copolymers may be random or have a block structure, wherein also

Mixed forms are possible (so-called tapered structures). Corresponding products are described in the literature and commercially available from

available from various providers. Examples are the commercial product series Styrolux ^® and Styroflex ^® BASF SE or specifically as with Anhydride-functionalized styrene / ethene / butene copolymer ^Kraton® G 1901 FX from Shell.

The polymers of the outer film may also latently contain the functional groups, i. in a form in which the actual functional group is released only when hardened.

Furthermore, it is possible to use mixtures of polymers, wherein only one of the polymers having the functional groups or latent functional groups of the aforementioned type.

Suitable polymers having functional groups in this variant are, for example, polyamides, polyoxymethylene, acrylonitrile-butadiene-styrene copolymers (ABS), polymethyl methacrylate,

Polyvinyl acetate and polyvinyl alcohol.

It is essential that the polar polymer is readily miscible with the polymer without functional groups. The mixing can advantageously take place in the melt. The amount of mixed polymer having functional groups is usually in the range of 0.01 to 50% by weight, based on the mixture.

In principle, taking into account these criteria are suitable

Polyolefins such as polyethylene or polypropylene, polyamides, polyesters such as polybutylene terephthalate, polyethylene terephthalate or

Polyethylene naphthalate, polyvinyl chloride, polyacrylonitrile or thermoplastic polyurethanes or mixtures of these polymers. Thermoplastic elastomers are also suitable in principle.

Thermoplastic elastomers are materials in which elastic polymer chains are incorporated in thermoplastic material. Despite the lack of a required in the classic elastomers

Vulcanization, thermoplastic elastomers have rubbery properties, which may be advantageous in some applications. By way of example, polyolefin elastomers or polyamide elastomers may be mentioned here. Corresponding products are described in the literature and commercially available from various manufacturers, so that here detailed information is unnecessary. Instead of by copolymerization or by mixing or grafting the functional groups can be introduced into the outer film with the aid of suitable adhesion promoters, which are applied to the surface of the films. Suitable adhesion promoters in this embodiment are, for example, silanes, solutions or melts of polar or

functionalized polymers, as well as suitable adhesives and

Adhesive films. These are preferably applied uniformly covering the film which forms the inner film tube, in order to obtain as uniform a distribution of the functional groups as possible.

Finally, the above-mentioned functional groups can also be obtained by surface-treating the films forming the outer film tube with the aid of gases such as oxygen, fluorine or chlorine. Owing to the action of these media, oxygen-containing functional groups of the type mentioned at the beginning are formed on the surface

preferred type such as acid-acid anhydride or epoxide groups. It should be noted, however, that the distribution of functional groups on the surface is difficult to control, so that there is a higher likelihood of inhomogeneous distribution than by the previously described methods of co- or graft polymerization or the use of adhesion promoters. Also, the type and amount of functional groups may be subject to greater variation in this variant.

An introduction of functional groups can also be achieved by plasma or corona treatment. Corresponding methods are known to the person skilled in the art and described in the literature. However, it has been found in some cases that the content of

decreases functional groups in the corona treatment with time, which may be disadvantageous when the inventive

Lining hoses are stored for long periods prior to introduction into the fluid-carrying systems to be rehabilitated.

In general (and regardless of the type of polymer), but without being limited thereto, the film from which the at least one outer film tube is formed has a thickness in the range of 40 to 2000 μηη, preferably in the range of 50 to 1500 μηη and particularly preferably from 80 to 1000 μηη. The foil tape can also

be chosen correspondingly thicker, if a higher strength is desired.

The outer film tube can also have a reinforcement, such as a fleece lamination as described in EP 1 180 225.

If reinforcing agents are to be used, these are generally based on fibers, in particular based on fiber ribbons.

As slivers are basically all known in the art products in the form of fabrics, knitted fabrics, mats or fleeces, which may contain fibers in the form of long filaments or short fibers. The thickness of the reinforcement, for example the nonwovens, is advantageously in the range of 0.005 to 2 mm, more preferably in the

Range of 0.1 to 1 mm.

As component a), the inventive

Lining hoses at least one inner film tube on the basis of a thermoplastic material.

Also, the inner film tube can according to a preferred

Embodiment on the resin impregnated fiber tube

surface facing functional groups having a

Enter reaction with the fiber tube.

For construction and structure of such inner film hoses with functional groups is in principle the above for the functional groups having outer film hoses said, but in the

Difference to the outer film is to pay attention that the

Inner film tube has the best possible transparency against the light used for irradiation and curing, so that complete curing can be achieved.

In cases in which it appears unnecessary to furnish the inner film with functional groups, it is possible to use polymer films which consist of the monomers described above for the outer film without the comonomers having functional groups can be obtained.

As component c), the lining hoses according to the invention have at least one fiber hose impregnated with a hardenable resin between at least one inner and at least one outer film hose.

This lining hose can be obtained by winding slivers on or around the inner film tube by means of a winding mandrel or other suitable device or by folding and folding fiber slivers. By folding the slivers also creates a hose, the superimposed edges can optionally be connected to each other by means of suitable connection methods such as sewing or gluing.

Corresponding methods for producing such lining hoses are known to the person skilled in the art and described in the literature, so that further details are dispensable here. The advantages of the invention are not dependent on a particular manufacturing process of

lining hoses according to the invention.

In some cases, after a winding process, such as e.g. in WO 95/04646, obtained lining hoses proved to be particularly advantageous.

According to a preferred embodiment, the resin-impregnated

Fiber tube obtained by the winding of slivers by means of a device as described in WO 95/04646.

The resin-impregnated fiber ribbons can basically the same

Structure as the reinforcing materials, as they have already been described for the outer film tube.

As slivers are therefore basically all the

Expertly known products in the form of woven, knitted, laid, mats or nonwovens, the fibers in the form of long

Contain endless fibers or short fibers. According to a particularly preferred embodiment, the fiber-based reinforcement is a glass fiber fabric or a

Fibers for reinforcement.

[0057] Tissues are generally sheet-like

Textile products of at least two crossed at right angles

Fiber systems understood, the so-called chain in the longitudinal direction and the so-called shot run perpendicular thereto.

According to a preferred embodiment, the

lining hoses according to the invention in the radial direction

at least two different superimposed

resin-impregnated slivers.

Knitted fabrics are generally understood to mean fabrics which are formed by stitching.

Fiber scrims are a processing variant of fibers in which the fibers are not interwoven, but are aligned parallel or at an angle to each other and optionally fixed by means of a step path or an adhesive. Fiber scrims, especially fiber scrims with parallel fiber orientation, can have a pronounced anisotropy of the orientational orientations and perpendicular thereto due to the orientation of the fibers, which for some applications of

Interest can be.

A fleece consists of loosely connected fibers, which still

are not connected. The strength of a fleece is based only on the fiber's own liability, but can be influenced by work-up. In order to be able to process and use the fleece, it is usually solidified, for which various methods can be used.

Nonwovens are different from fabrics, or knitted fabrics, which are characterized by the manufacturing process specific laying of the individual fibers or threads. Nonwovens, on the other hand, consist of fibers whose position can only be described by the methods of statistics. The fibers are confused with each other in the nonwoven fabric. Accordingly, the English term nonwoven (non-woven) clearly distinguishes it from woven fabric. Nonwovens, inter alia, are classified according to the fiber material (eg the polymer in the case of chemical fibers), the bonding process, the type of fiber (staple or continuous fibers), the fiber fineness and the fiber orientation

distinguished. The fibers can be deposited defined in a preferred direction or be completely stochastically oriented as in the case of

Random layers nonwoven fabric.

When the fibers have no preferred direction in their orientation

(Orientation), one speaks of an isotropic fleece. If the fibers are arranged more frequently in one direction than in the other direction, then this is called anisotropy.

Also suitable as fiber ribbons are felts. A felt is a fabric of a disordered, difficult to separate fiber material. In principle, felts are thus nonwoven textiles. Made of chemical fibers and

Fibers are usually produced by dry needling (so-called needle felts) or by solidification with water jets emerging from a nozzle beam under high pressure. The individual fibers in the felt are intertwined with each other.

Needlefelt is usually mechanically with numerous needles with

Barbed, the barbs are arranged inversely as in a harpoon. This will force the fibers into the felt and the needle will come out easily. Repeated plunge the fibers are intertwined and

then possibly treated chemically or with steam.

Felts can be - like nonwovens - from virtually all natural or

produce synthetic fibers. In addition to needling or in

Complementing is also the hooking of the fibers with a pulsed one

Water jet or with a binder possible. The latter methods are particularly suitable for fibers without flake structure such as polyester or polyamide fibers.

Felts have a good temperature resistance and are usually moisture-repellent, which may be particularly advantageous when used in liquid-carrying systems. By the combined use of several different

Slivers of different structure in terms of fiber type,

Fiber length, fiber incorporation or fiber orientation can

Property profile of the liner hoses according to the invention are individually adapted to the particular application, without the need for elaborate alterations to the devices used for the preparation. By choosing the order in which the at least two different fiber ribbons are arranged, the radial and longitudinal profile of the inventive

Lining hoses individually designed and optimally adapted to the specific application.

The length of the fibers used is not subject to any particular limitation, i. Both so-called long fibers and short fibers or fiber fragments can be used. Over the length of the fibers used, the properties of the corresponding fiber ribbons can be adjusted and controlled over a wide range.

The type of fibers used is not subject to any restriction. For example, here are glass fibers, carbon fibers or plastic fibers such as aramid fibers or fibers of thermoplastic materials such as

Polyesters or polyamides or polyolefins (e.g., polypropylene) known to those skilled in the art having their properties and being commercially available in a wide variety. For economic reasons, glass fibers are generally preferred; However, if, for example, a particular heat resistance of importance, for example, aramid fibers or carbon fibers can be used, which can offer advantages over glass fibers in terms of strength at higher temperatures.

In some cases, it has proven to be advantageous if a first resin-impregnated sliver is selected from woven, knitted, laid, mat, felted or nonwoven fabrics, the length of the fibers being able to be chosen according to the desired application. In this case, for example, the first resin-impregnated sliver a fiber layer of parallel aligned continuous fibers, preferably aligned parallel Be endless glass fibers. Advantageously, the continuous fibers are substantially perpendicular to the longitudinal direction of the resin-impregnated sliver

aligned. With such a first sliver preferably a second sliver can be combined, in which fibers in one

Wirrfasermatte are arranged undirected. The first sliver gives the lining hose a very good strength in the longitudinal direction, which is advantageous when installed in the piping systems to be rehabilitated. The second sliver with undirected fibers in the form of a

As a result of the high resin absorption, fiber mat stabilizes the inner surface and avoids pores on the inner surface, which could lead to damage on prolonged contact with aggressive media. On the other hand, the use of the directional fiber scrim reduces the risk of the fiber mat being pulled apart during impregnation, resulting in uneven impregnation. Static requirements for the liner also make this embodiment preferable.

Particularly advantageously, in a first resin-impregnated fiber band, the fiber fabric may already be needled or sewn with a random fiber mat, i. The first and also the subsequent fiber slivers subsequently introduced can also have a multilayer structure. It has proved to be advantageous in some cases if at least one of the following slivers arranged on a first sliver are constructed multi-layered such that between two layers of undirected fibers an intermediate layer with parallel to the longitudinal direction of the sliver arranged chopped fibers are included, preferably a length in the range of 2 to 200, preferably from 3 to 40 cm.

According to a particularly preferred embodiment, the

lining hoses according to the invention a resin-impregnated

Fiber tube, which contains at least one sliver with oriented substantially perpendicular to the longitudinal direction of the sliver fibers and at least one further sliver with fibers oriented parallel to the longitudinal direction of the sliver. According to a further preferred embodiment, a fleece, preferably of polyolefin fibers, is particularly preferred

Polypropylene nonwoven used as at least a first resin-impregnated sliver, which can be combined with any other sliver of the types described above.

Basically, it is possible, as mentioned, any types of

Combine fiber slivers, which achieve the desired property profile for the intended application in the best possible way. So can

Fiber slivers with similar fiber binding (ie, for example, two fiber fabrics or two fiber fabrics) are used which contain fibers of different chemical composition, different orientation or with different lengths. By way of example, short fibers in a sliver can be combined with long fibers in at least one further sliver, or fabrics can be combined with nonwovens, mats or knitted fabrics. Also the use of two fiber fabrics with fibers of the same type of integration and the same orientation and length but different chemical

Composition is possible. This opens up a wide range of variations for the person skilled in the art, within which he virtually quotes the properties of the lining tube for individual application

"tailoring" can.

Starting from the desired property profile, the person skilled in the art will select the suitable fiber ribbons for the inventive fiber

Lining hoses with the help of his expertise on the

Characteristics of the different types of slivers and is thus able to provide optimal adapted to the individual application products.

The impregnation of the resin-impregnated fiber ribbons with resin is carried out in a conventional manner. Corresponding methods are known in the art and described in the literature, which is why detailed here

Versions are unnecessary.

The person skilled in the art will use the resin used for impregnation, depending on the nature of its fiber reinforcement and the required properties in the select individual application. Resins for impregnation of

Fiber systems are described in large numbers in the literature and known to those skilled in the art.

A first preferred group of reaction resins are unsaturated

Polyester resins or vinyl ester resins, which may be dissolved, for example, in styrene and / or an acrylic ester. Suitable reaction resins of this type are known to the person skilled in the art and are commercially available in various designs.

Furthermore, a number of epoxy resins (both one-component and two-component systems) are described in the literature, from which the skilled person can choose if necessary.

The reaction resins may be e.g. by means of electromagnetic radiation, e.g. by UV light with photoinitiators as described for example in EP-A 23634, cured. Purely thermally curable

Systems are also known and suitable. Also so-called

Combination Curing with one for thermal curing

The initiator used (e.g., a peroxide initiator in combination with the photoinitiators mentioned are possible and have been found to be particularly advantageous for large wall thicknesses of the lining tubes.) A process for such combination curing is described, for example, in EP-A 1262708.

After soaking, the resin may conveniently be thickened

be as described for example in WO-A 2006/061 129. This increases the viscosity of the resin and thus improves the handleability of the related fiber ribbons.

The width of the slivers is not subject to any special per se

restrictions; for a variety of applications have become

Fiber slivers having a width of 20 to 150, preferably from 30 to 100 and in particular from 40 to 80 cm proved to be suitable.

The thickness of the fiber ribbons in the inventive

Lining hoses is also subject to no particular

Restriction and is determined by the thickness of the lining tube for the desired application. Thickness of slivers in the Range of 0.01 to 1, in particular 0.05 to 0.5 mm have been proven in practice.

The finished lining tube, which is generally 1 to 1000 m,

In particular 30 to 300 m long, is introduced in the actual line rehabilitation in the pipeline system to be rehabilitated and there, for example. inflated with pressurized water or preferably with air, so that it snugly conforms to the inner wall of the pipeline system to be rehabilitated. Finally, the resin is transformed by electromagnetic radiation, e.g. in EP-A 122 246 and DE-A 198 17 413, hardened.

The lining hoses of the invention may e.g. in accordance with the methods described in WO 95/04646 and with the aid of the devices described there, to which reference should be made here for further details.

According to a preferred method, the inventive

Lining hoses obtainable by that first

A) the longitudinal edges of a flat film of a thermoplastic

Plastic brought into contact with each other and then on the resulting abutting edge in the longitudinal direction

Foil tape is applied, whose elastic modulus in the

Longitudinal orthogonal orientation exceeds the modulus of elasticity of the flat film in the corresponding orientation, measured under the same conditions, and the film strip is connected to the flat film, whereby a film tube is formed,

B) on the film tube obtained in step a) on its reinforced surface side at least one resin-impregnated sliver so

is applied, that a resin-soaked fiber tube is formed, and

C) Finally, an outer film tube is applied to the product obtained in step b), which encloses this.

Devices with which the longitudinal edges of a flat film in plant

can be brought, are known in the art and described in the literature, so that no further explanation is needed here. For example only, see WO 95/04646, in particular FIG. 12 and the corresponding embodiments in the description and to WO 90/01 1 175, where corresponding devices are shown and described.

The application of the film strip on the by investing

resulting impact edge can be done in a conventional manner; Thus, for example, a corresponding foil strip can be pulled off parallel to the flat foil from a corresponding device, in particular a roll, and applied to the bumper edge. Also in this regard, it requires no special complex apparatus design, but commercially available devices can be used.

The bonding of the film strip to the flat film can preferably be effected by gluing or welding, wherein the welding is particularly preferred since a homogeneous material composite is formed. When gluing, make sure that the adhesive used is stable under the conditions of use. For the most commonly used resins, this usually requires resistance to styrene, among other things. The adhesive required for bonding can either already be applied to the film strip (then it is in the

Foil tape around a so-called adhesive tape) or separately be introduced with a corresponding metering device between the film strip and flat film. Suitable adhesives are known per se and described in the literature, so that further information is unnecessary here. The skilled person will select on the basis of the materials used for film tape and flat film, an adhesive that is suitable for a

best possible connection of flat film and foil strip leads.

The lining hoses according to the invention are suitable for

Refurbishment of fluid-carrying systems of any kind and allow a quick refurbishment while minimizing the downtime of the

Piping systems while they need to be taken out of service. This reduces downtime compared to replacing damaged parts. Particularly advantageous, the

lining hoses according to the invention are used for the rehabilitation of such systems, which are for a classic repair or Renovation replacement of parts are difficult to access, because these are, for example, components of a Gesanntvorrichtung or because they are inaccessible, eg because they are laid in the ground. When

Examples are here called piping systems for the transport of water or wastewater (sewer systems and the like), in cities and communities in the ground and often under roads or other

Traffic routes are laid. In the case of rehabilitation through replacement, these systems must first be cleared up by appropriate earthworks and the traffic routes are not accessible to traffic for longer periods of time, which leads to considerable impairments, especially in the case of higher traffic volumes. In comparison, the

Refurbishment of such systems with the invention

Lining hoses without earthworks in a few hours or days without extensive earthworks are performed.

The use of the lining hoses according to the invention for the rehabilitation of water and sewage pipe systems, in particular channels, is therefore a further subject of the invention

Claims

claims

1. lining hose for the renovation of fluid-carrying systems with

a) at least one inner film tube based on a

thermoplastic,

b) at least one outer film tube based on a

thermoplastic and

c) at least one impregnated with a photochemically curable resin fiber tube between an inner and an outer film tube, wherein the outer film tube, which is impregnated with a resin

Fiber tube is in contact on the surface facing the fiber tube in the installed state has functional groups that undergo a reaction with the fiber tube.

2. lining hose according to claim 1, characterized in that it is the functional groups are carboxylic acid, carboxylic acid anhydride, carboxylic acid ester, Carbonsäureamid-, Carbonsäureimid-, amino, hydroxyl, epoxy, urethane and oxazoline.

3. lining hose according to at least one of claims 1 to 2, characterized in that it is the carboxylic acid, carboxylic anhydride or epoxy groups in the functional groups.

4. lining hose according to at least one of claims 1 to 3, characterized in that also comprises the inner film tube on the surface in the installed state a resin-impregnated fiber tube facing surface functional groups that undergo a reaction with the fiber tube.

5. lining hose according to one of claims 1 to 4, characterized

characterized in that the inner film tube has a thickness in the range of 40 to 800 m.

6. lining hose according to at least one of claims 1 to 4, characterized in that the transparency of the inner film for electromagnetic radiation of the wavelength used for curing, in particular at the wavelength at which initiators disintegrate in the impregnation-related resin, more than 50% .insbesondere is more than 60%.

7. lining hose according to one of claims 1 to 6, characterized

in that the functional groups are obtained by copolymerization of corresponding monomers with other monomers from which the polymers forming the inner film are produced, or else by

common use of polymers without functional groups with polymers having functional groups, preferably via the melt or by coextrusion.

8. lining hose according to one of claims 1 to 6, characterized

characterized in that the functional groups by

Surface treatment of the outer film tube forming film are obtained by means of gases.

9. lining hose according to at least one of claims 1 to 6, characterized in that the functional groups are applied by means of Haftvemittlern on the film forming the outer film tube.

10. Use of the lining hoses according to the invention according to one of claims 1 to 9 for the rehabilitation of water and sewage piping systems, in particular channels.