EP3463850A2

EP3463850A2 - Curable liners for the rehabilitation of fluid-conducting systems

Info

Publication number: EP3463850A2
Application number: EP17730365.8A
Authority: EP
Inventors: Stefan Reichel
Original assignee: SML Verwaltungs GmbH
Current assignee: Relineeurope AG
Priority date: 2016-05-27
Filing date: 2017-05-24
Publication date: 2019-04-10
Also published as: JP2019523717A; DE112017002683A5; DE102016109843A1; WO2017202421A2; US20200316925A1; WO2017202421A3

Abstract

The invention relates to a liner for the rehabilitation of fluid-conducting systems, comprising a) an inner film tube based on a thermoplastic, b) an outer film tube based on a thermoplastic, and arranged between the inner and the outer film tube, c) at least one fibrous tube based on a composite material that consists of (c1) industrially generated inorganic fibers, natural fibers or mineral fibers and (c2) man-made fibers, said fibrous tube being impregnated with a curable resin.

Description

description

Curable lining hoses for refurbishing fluid-carrying systems

The present invention relates to curable lining hoses for refurbishing fluid-carrying systems of an inner film tube, an outer film tube, and between a impregnated with a curable resin fiber tube. Another aspect of the present invention relates to the use of the lining hoses according to the invention for the rehabilitation of fluid-carrying systems of any kind.

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.

Corresponding lining hoses are in a variety

various embodiments of various manufacturers commercially available and described in the literature.

[0004] Under the trade name NORDIPIPE ^® are lining tubes

known, which have a plurality of resin impregnated layers, wherein at least one layer of glass fibers and at least one layer of polyester fibers. For impregnation epoxy resins are used and the curing is carried out thermally. Such lining hoses have a limited storage stability and the resin used for impregnation can usually only immediately before the introduction of the

Lining hose are introduced into the pipe system to be rehabilitated in the hose, which brings a number of problems. The uniform impregnation of the inner layers of such a lining tube is difficult to achieve, which adversely affects the product quality of the installed hardened tube.

As a rule, such systems can not be cured photochemically, since the inner film has to be chosen to be relatively thick for stability reasons. what adversely affects the transparency and thus the photochemical curing The inner film remains in such systems as

Protective layer for the lining hose in the pipe system.

Under the name line Tee® Hybrid are liner hoses

available, which have as a supporting structure a combination of glass fibers and a needle felt. These are structurally similar to the products described above and therefore have the same disadvantages.

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 remediation of fluid carrying systems with a) an inner film tube based on a

thermoplastic,

b) an outer film tube based on a

thermoplastic and

c) at least one impregnated with a curable resin

Fiber tube between inner and outer film tube on the basis of a composite material of (c1) produced industrially

inorganic fibers, natural fibers or mineral fibers and (c2)

Chemical fibers.

As a fluid is generally referred to a medium which opposes any slow shear shear resistance. Of the

superordinate term fluid denotes gases and liquids, since most physical laws apply to both aggregate states

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

Only as an example are here as a fluid-carrying piping drinking water and supply water lines (piping systems with which water is transported from storage or from the place of production to the place of use or to buffers), fluid-carrying lines of any kind in industrial environments in factories or production facilities or sewage systems of any kind (eg channels or sewage collectors or the like) mentioned.

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 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.

In the component c) is one with a curable

Resin-impregnated fiber hose based on a composite of (c1) industrially produced inorganic fibers, natural fibers or mineral fibers and (c2) chemical fibers.

A composite or composite material within the meaning of the present invention is generally a material of two or more interconnected materials having different material properties than its individual components. Material properties and geometry of the components are important for the properties of the composites. In particular, size effects often play a role. The connection is made by fabric or form-fitting or a combination of both.

Composite materials are thus distinguished from multilayered

Systems of different materials, the more layers form without a penetration of the individual layers is required.

Composite materials are mixtures of unmixed raw materials. A solution of the individual basic materials with each other does not take place or only superficially. By compounding thus at least two substances are interconnected. The aim is to ensure an intimate connection of the phases over the long term and under load.

The resin-impregnated composite-based film tube c) can be obtained by winding corresponding composite ribbons on or around the inner tubular film by means of a winding mandrel or other suitable device, or by folding and folding composite tapes. By the

When the composite strips are folded together, a tube is also produced, wherein the margins lying on one another can possibly be connected to one another by means of suitable joining methods such as sewing, welding or gluing.

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

lining hoses according to the invention.

The contained in the lining hoses according to the invention

Composite material is composed of two components c1) and c2).

The component c1) is constructed from industrially produced

inorganic fibers, natural fibers or mineral fibers.

As industrially produced inorganic fibers here are glass fibers,

Basalt fibers, carbon fibers, metal fibers, ceramic fibers and

Called nanotube fibers.

A glass fiber is a long glass fiber made of glass. During production, thin threads are drawn from a molten glass.

Glass fibers are aging and weather resistant, chemically resistant and incombustible and are among the most important today

Construction materials.

Basalt fibers have similar properties as glass fibers. The

physical properties and thus the application areas are similar to those of glass fiber. As a rule, basalt fibers are produced from a liquid basalt melt at about 1400 ° C.

Metal fibers are, in principle, fine wires of metals, e.g. Gold,

Silver, iron, tungsten, aluminum, copper, lead and their alloys, which are referred to as fibers because of their textile processing.

Ceramic fibers are fibers of inorganic, non-metallic

Material. The ceramic fibers are classified into oxidic and non-oxidic species. Known oxidic ceramic fibers are fibers based on alumina or silica, a known type of non-oxide ceramic fibers are silicon carbide fibers.

Under natural fibers are all fibers to understand that come from natural sources such as plants, animals or minerals and can be directly prepared and used without further chemical transformation. Natural fibers are thus to be distinguished from man-made fibers that are produced synthetically.

For example, as natural fibers, seed fibers, bast fibers,

Hard fibers, fibers of wool and fine animal hair, coarse animal hair, silk fibers, casein and generally called protein fibers.

Seed fibers are called those plant fibers, in contrast to

Stem or leaf fibers are obtained from the seeds of the plants, such as cotton or kapok.

As bast or Sklerenchymfasern plant fibers are called, in the form of multicellular fiber bundles in bast different

Plant species present. The best known commercially used

Bast fiber plants are Nutzhanf (hemp fiber), the Faserlein

(Flax fiber), the fiber nettle, the ramie and kenaf and jute.

As wool is called after the textile labeling law

soft hair of the coat (in contrast to the top coat) especially the sheep. In a broader sense, so are those of others Mammals (eg goats, camelids and angora rabbits)

spinnable fine hairs obtained, which are often provided with an animal-specific attachment (e.g., angora wool) or expressly referred to as "hair" (e.g., camel hair).

Examples of coarse animal hair fibers are horsehair fibers,

Ox hair, goat hair, badger hair, pig bristles or reindeer wool.

Silk is a fine fiber that comes from the cocoons of the silkworm, the

Larva of the silk moth, is won. It is the only naturally occurring textile continuous fiber and consists mainly of protein.

Casein fibers are similar in their properties of wool and are made from casein. For production, casein powder is heated together with other natural ingredients and pulled through a nozzle into threads.

Under mineral fibers are generally fibers without organic

classified carbon. Representatives of this fiber group are asbestos fibers, erionite fibers, fiber plaster and wollastonite fibers.

Corresponding fibers of component c1) are known in the art per se, described in the literature and commercially available. The person skilled in the art will select suitable products based on his specialist knowledge for the respective application.

In the component c2) of the composite in the

lining hoses according to the invention are

Chemical fibers. As man-made fibers within the meaning of the present invention, synthetically produced fibers are said to be based on

Synthetic polymers are understood.

These include, e.g. Fibers based on polycondensates such as

Polyesters (Diolen®, Trevira®), polyamides (trade names Nylon®, Perlon®, Dederon®, Grilon®), polyimides, polyamide-imides,

Polyphenylene sulfide, as well as aramid fibers. examples for

Polymerization fibers are polyacrylonitrile fibers, PTFE fibers,

Polyolefin fibers (polyethylene, polypropylene) and PVC fibers. Also suitable are fibers based on polylactide or fibers

Polyurethane. Corresponding products are known per se to the person skilled in the art and described in the literature, so that detailed information is unnecessary here.

As component c1) have in some cases glass or

Carbon fibers proved to be advantageous. Preferred fibers c2) are fibers based on polyesters, polyamides or polyolefins or their copolymers.

The ratio of the components c1) and c2) in the composite material is not subject to any particular limitation and is of

Professional adapted to the particular application. In general, the weight ratio c1 / c2 is in the range of 5:95 to 95: 5, preferably in the range of 20:80 to 80:20.

As composite material strips are basically all the

Professional known products in the form of fabrics, knitted fabrics,

Located mats or fleeces, the fibers in the form of long

Contain endless fibers or short fibers.

[0042] Tissues are generally sheet-shaped

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.

[0043] According to a preferred embodiment, the

Lining hoses according to the invention in the radial direction at least two different superimposed

Resin-impregnated fiber ribbons made of a composite material.

Knitted fabrics are generally understood to mean fabrics which are produced 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, may have a pronounced anisotropy of the orientational orientations and perpendicular thereto due to the orientation of the fibers, which may be of interest for some applications. A nonwoven consists of loosely connected fibers, which are not yet connected to each other. 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 a certain production of the laying of 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 slivers 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. By repeated The fibers are intertwined and pierced

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.

Suitable processes for the production of composite materials

Glass fibers and fibers based on thermoplastics or carbon fibers are known per se to the person skilled in the art and described in the literature, so that detailed explanations are given here

are dispensable. According to one embodiment of the invention, in addition to the resin-impregnated fiber hose based on a composite material, one or more further resin-impregnated fiber hoses may be present. These may be in the same form as described above for the fiber composite tubing, ie, in the form of woven, knitted, laid, mat or non-woven fabrics which may contain fibers in the form of long filaments or short fibers. The above applies accordingly.

In some cases it has proved to be advantageous if the

Composite-based resin-impregnated fiber tubing is selected from woven, knitted, laid, mats, felts or nonwovens, the length of the fibers being selected according to the desired application. In this case, e.g. the resin-impregnated fiber tube is a fiber layer of parallel aligned continuous fibers, preferably parallel aligned continuous glass fibers. Advantageously, the continuous fibers are aligned substantially perpendicular to the longitudinal direction of the resin-impregnated fiber tube.

With such a first fiber tube, preferably a second fiber tube or a fiber band can be combined, in which fibers are arranged undirected in a random fiber mat. The first

Fiber hose gives the lining hose a very good

Strength in the longitudinal direction, which is advantageous for installation in the piping systems to be rehabilitated. The second fiber tube with

Undirected fibers in the form of a random fiber mat stabilize the inner surface due to the high resin absorption and avoid pores on the inner surface, which could lead to damage on prolonged contact with aggressive media. By the use of the directed

On the other hand, the fiber-laid fabric is subject to the risk that the fiber mat is pulled apart during the impregnation and thus becomes one

uneven impregnation comes reduced. Also static

Requirements for the liner make this embodiment preferable. Particularly advantageously, in the resin-impregnated fiber hose on the basis of a composite material, the fiber fabric already with a

Needle mat may be needled or sewn, i. the first and also the following, if appropriate, fiber hoses introduced can also have a multilayer structure. It has proved to be advantageous in some cases if at least one of the following arranged on the first fiber tube on the basis of a composite material

Multi-layered fiber ribbons are constructed in such a way that between two layers with undirected fibers an intermediate layer with cutting fibers arranged parallel to the longitudinal direction of the fiber sliver are contained, which preferably have a length in the range from 2 to 200,

preferably from 3 to 40 cm.

According to a preferred embodiment, the resin-impregnated

Composite-based fiber hose c) obtained by winding fiber slivers by means of a device as described in WO 95/04646.

As component a), the inventive

Lining hoses on an inner film tube on the basis of a thermoplastic material.

As component b), the inventive

Lining hoses on an outer film tube on the basis of a thermoplastic material.

Structure and construction of the inner film and the outer film tube

are not subject to any particular restriction regarding the

Material selection.

According to a preferred embodiment, the inner and / or the outer film tube functional groups that allow a connection to the component c).

Film hoses a) and b) with functional groups can in principle be prepared by any type known to the person skilled in the art. It is thus possible, for example, to use prefabricated seamless hoses or else hoses brought into abutment by placing the longitudinal edges of flat films and corresponding connection of the flat sheets 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 and a winding method can be used, in which a

Foil tape such as e.g. in WO 95/04646, is wound. In principle, all methods are equally suitable and the person skilled in the art will select the most suitable method on the basis of his specialist knowledge, taking into account the current application situation.

The nature of the incorporation of the functional groups in the inner and / or outer film tube is not subject to any limitation and it can in principle be applied to all methods that the

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 to react with the fiber tube and

preferably with the fiber material or in particular with the

photochemically curable resin required. As far as the reaction only takes place during the curing (which has proven in some cases to be advantageous), this requires a corresponding stability of the functional groups, since the lining hoses according to the invention are usually prefabricated and between production and curing in the system to be rehabilitated several weeks or even months can lie. A reaction only during curing has the advantage that during installation and installation of the

Auskleidschlauchs to the wall of the system to be rehabilitated little or no interaction between the inner and

Outer film and the component c) are to be expected, which have a detrimental effect and can lead to wrinkles or similar problems, for example.

Suitable functional groups for the indoor and / or

External film tube 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 corresponding 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 the 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 can 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.

Hereinafter, some preferred groups of polymers are somewhat

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

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.

For the inner film, however, when using a photochemical

curable resin as high a permeability in these

Wavelength ranges, i. a low absorbance or absorption desirable.

The desired transparency of the inner film also depends on its thickness and in the context of the present invention

Inner film hoses preferred which have a thickness in the range of 40 to 800 μιτι, preferably from 80 to 250 μιτι and particularly preferably from 100 to 200 μιτι.

The extinction or absorption of films is usually characterized by the transparency, i. E. 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 for indoor and

Outer foil tube 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.

Comonomers for the mentioned olefins are in particular

Alkyl acrylates or alkyl methacrylates derived from alcohols having 1 to 8 carbon atoms, e.g. Ethanol, butanol or ethylhexanol, to name but a few 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, which 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 proved 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) mentioned. 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. As examples, the commercial product lines Styrolux ^® and Styroflex ^® of BASF SE, or specifically as the functionalized with anhydride groups styrene / ethene / butene copolymer Kraton ^® G may be mentioned FX 1901 of Fa. Shell.

The outer film polymers 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 e.g. 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 by means 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. However, it should be noted at this point that the distribution of the functional groups on the surface is difficult to control, so that there is a higher probability 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.

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. It has However, in some cases, it has been found 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 m, preferably in the range of 50 to 1500 μιτι and more preferably from 80 to 1000 μιτι on. The foil tape can also

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

The outer film tube may also have a reinforcement, such as a fleece lamination as described in EP 1180 225.

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

Basically, all products known to the person skilled in the art in the form of woven fabrics, knitted fabrics, mats, fleeces or nonwovens which may contain fibers in the form of long continuous fibers or short fibers are suitable as fiber slivers. 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.

According to a particularly preferred embodiment, the

lining hoses according to the invention a resin-impregnated

Composite based fiber hose having at least one

Sliver substantially perpendicular to the longitudinal direction of the sliver

Sliver-oriented fibers and at least one further sliver with oriented parallel to the longitudinal direction of the sliver fibers.

The impregnation of the resin-impregnated fiber slivers with resin takes place in a manner known per se. Corresponding methods are known to the person skilled in the art and described in the literature, which is why detailed here

Versions are unnecessary.

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

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

According to a preferred embodiment, a photochemical

hardenable resin used.

A preferred group of such photochemically curable 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 in the art and in

various versions commercially available commercially.

Such reaction resins may e.g. by means of electromagnetic

Radiation, e.g. by UV light with photoinitiators as described for example in EP-A 23634, cured. Also called combination hardening 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 lining tubes. A method for such a 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 2006/061129. This increases the viscosity of the resin and thus improves the handleability of the related fiber ribbons.

The width of the fiber ribbons for producing the fiber tubes is not subject to any particular limitations per se; for a variety of

Applications have been found to be suitable fiber ribbons with a width of 20 to 150, preferably from 30 to 100 and especially from 40 to 80 cm. The thickness of the fiber ribbons for the fiber hoses in the lining hoses according to the invention is likewise not particularly limited and is determined by the thickness of the hoses

Lining hose for the desired application. Thicknesses of the fiber ribbons 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 preferably by means of

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.

[00109] 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 to refurbish such systems which are difficult to access for a classic repair or refurbishment involving the replacement of parts, for example because they are components of an overall device or because they are inaccessible, e.g. because they are buried 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 renovation by replacement need These systems are only exposed by appropriate earthworks and the traffic routes are not accessible to the traffic over long periods of time, which leads to significant impairment, especially at higher traffic volumes. In comparison, the remediation of such systems with the inventive

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 refurbishment of fluid-carrying line systems, in particular of water and sewage piping systems (ducts) or industrial piping systems, is therefore a further subject of the invention.

Claims

claims

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

a) an inner film tube based on a thermoplastic,

b) an outer film tube based on a thermoplastic material and

c) at least one impregnated with a curable resin fiber tube between the inner and outer film tube on the basis of a

Composite of (c1) industrially produced inorganic fibers, natural fibers or mineral fibers and (c2) chemical fibers.

2. lining hose according to claim 1, wherein it is the industrially

produced inorganic fibers to glass fibers and the man-made fibers to fibers based on thermoplastic polymers.

3. lining hose according to claim 1, characterized in that the curable resin is photochemically curable.

4. lining hose according to one of claims 1 to 3, characterized

characterized in that the resin is an unsaturated polyester resin or a vinyl ester resin.

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

in that, in addition to the resin-impregnated fiber hose based on a composite material, one or more further resin-impregnated fibers

Fiber hoses are included.

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

in that the inner and / or outer film tube contains functional groups selected from carboxylic acid, carboxylic acid anhydride,

Carbonsäureeester-, carboxylic acid amide, carboxylic acid imide, amino, hydroxyl, epoxy, urethane and oxazoline has.

7. lining hose according to claim 6, characterized in that it is the carboxylic acid, carboxylic anhydride or epoxy groups in the functional groups.

8. lining hose according to at least one of claims 1 to 7, characterized in that the inner film tube on the built-in Condition on a resin-impregnated fiber tube facing surface having functional groups that undergo a reaction with the fiber tube.

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

characterized in that the inner film tube has a thickness in the range of 40 to 800 μιτι, preferably from 80 to 250 μιτι.

10. Use of the lining hoses according to the invention according to one of claims 1 to 9 for the refurbishment of fluid-carrying systems.