WO2019219617A1

WO2019219617A1 - Liner for renovating fluid-conducting systems

Info

Publication number: WO2019219617A1
Application number: PCT/EP2019/062222
Authority: WO
Inventors: Stefan Reichel; Christian Noll
Original assignee: Sml Verwaltungs Gmbh
Priority date: 2018-05-14
Filing date: 2019-05-13
Publication date: 2019-11-21
Also published as: DE102018111361A1; EP3794268A1

Abstract

The invention relates to a liner for renovating fluid-conducting systems, containing at least one resin-impregnated fiber tube and optionally a reinforced or unreinforced inner film tube on the side of the resin-impregnated fiber tube facing the flowing medium. Nanoparticles are added to the liner in a layer which, after installation into the fluid-conducting system, is in contact with the flowing medium, said nanoparticles being added in an amount of 0.001 to 0.09 wt.% based on the weight of the layer containing the nanoparticles.

Description

CLOTHING HOSE FOR RESTORING FLUID-LEADING SYSTEMS

The invention relates to a lining hose for renovation

fluid-carrying systems with at least one resin-impregnated

Fiber tube.

Lining hoses for remediation fluid-carrying systems are known per se and described in the literature.

In practice, so-called liners based on thermoplastic materials with fiber reinforcement have proven useful for this purpose. These are flexible lining hoses to be rehabilitated in the

Introduced line system, then brought to the inner surface of the line system to be rehabilitated system and finally by curing the resin contained in the fiber tube in the

final shape.

The production of such lining hoses is described for example in WO 95/04646. According to the method described there is on a winding mandrel, which consists of several parallel, variable in their distance to the winding mandrel winding fingers, a first

Spiral wound film strip, wherein serving as a protective film inner film tube is formed. At least one resin-impregnated sliver is wound on the thus-obtained inner film tube and in turn a second foil strip, which forms an outer film tube.

Curable polymers with nanoparticulate fillers have been described in the literature for various applications.

Thus, in EP A 1502727 composite moldings are described which are prepared by injection of a low-viscosity plastic in a fiber carrier and subsequent curing by heating. Before injection, nanoparticles are added to the low-viscosity plastic. These are so-called prepregs, which are no longer flexible after curing. A use in lining hoses for the refurbishment of fluid-carrying systems is neither described nor suggested.

The subject of EP A 1 634 921 and EP A 1 786 866 are polymeric

Compositions, in addition to an unsaturated polyester and another copolymer with respect to the polyester reactive groups still Contain nanoparticles as fillers. Composites, coatings, potting compounds, adhesives and dental materials having improved mechanical properties, in particular improved impact resistance, can be obtained from these compositions.

In US 2010/0143701 a method is described in which

Carbon nanotubes dispersed in a solvent are applied to a fibrous surface, then the solvent is evaporated and finally the coated surface thus obtained is coated with a polymer to obtain a fiber-reinforced composite with embedded carbon nanotubes ,

WO 2005/028174 relates to the preparation of polymer composites

Epoxy resin base containing functionalized carbon nanotubes.

From WO 2016/096773 lining hoses are known which contain 0.1 to 40% by weight of nanoparticles.

The subject of US 2008/0271802 are materials for the rehabilitation of

Piping used to improve thermal conductivity

Carbon nanotubes in an amount of 0.5 to 40% by weight.

From US 2005/0194718 lining hoses are known which contain a resin-receiving material having a substantially impermeable coating. The lining hoses may contain fillers.

The present invention was based on the object

To provide liner hoses for remediation of fluid-carrying systems, the advantageous mechanical properties and a

have abrasion resistant surface.

This object is achieved with lining hoses according to claim 1. Preferred embodiments of the lining hoses according to the invention can be found in the subclaims and the following detailed description.

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 water and sewage piping systems. Under fluid-carrying systems in the context of the present invention, all systems are to be understood in which fluids, that is liquids or gases can be transported. There are no special ones

Restrictions on the design, diameter or material of the systems to be renovated.

The choice of material is determined by the in the systems too

transporting fluid media; their properties ultimately determine the service life of such systems and the need for a refurbishment that can be made with the liner hoses according to the invention.

The invention accordingly is a lining tube for remediation fluid-carrying systems, containing at least one

Resin-impregnated fiber hose, and possibly a reinforced or

unreinforced inner film tube on the flowing medium-facing side of the resin-impregnated fiber tube, wherein the

Lining hose in a layer which, after incorporation into the fluid-carrying system, is in contact with the flowing medium, 0.001 to 0.09% by weight of nanoparticles, based on the weight of the layer containing the nanoparticles. The layer which is in contact with the flowing medium after installation can be the inner film (if this remains after installation in the fluid-carrying system to be renovated) or the innermost layer of the lining hose or a nonwoven layer which is on the flowing medium facing side of the resin-impregnated fiber tube is arranged act. This nonwoven layer can be wholly or partially connected to the resin-impregnated fiber tube.

Surprisingly, it was found that even with very small

Held on nanoparticles, which are among those in WO 2016/096773

used or which are considered essential in US 2008/0271802, the desired improvement in the characteristics of the liner hoses can be achieved, both

processing technology as well as economically advantageous.

For the purposes of the present invention, the term nanoparticles is to be understood as meaning all particles of particles or fibrous particles whose size in at least one spatial direction is in the range from 1 to 400 nm, preferably is in the range of 10 to 300 nm. In the case of spherical or spherical particles, their average diameter is preferably in the range from 1 to 300 nm, preferably in the range from 5 to 150 nm and in particular in the range from 10 to 100 nm.

The term average particle diameter as in the context of

The present invention relates to spherical or spherical nanoparticles, refers to the average diameter D50 on the basis of the intensity-weighted particle size distribution as obtained by the so-called Contin-data inversion algorithm. D50 divides the intensity-weighted particle size distribution into two equal fractions, the first of which contains particles below D50 and the second particles above D50.

D50 is generally determined by dynamic light scattering according to ISO

22412: 2008 determined. The determination is carried out at a temperature of 25 ° C. The refractive index and the viscosity coefficient of the

Dispersion medium should be determined as accurately as possible or known from the literature. After a temperature calibration, the position of the measuring cell is adjusted to achieve an optimum scatter signal. Details of the measurement can be found in the mentioned ISO standard.

Spherical or spherical particles have one more or less

pronounced isometric structure, i. the dimensions in all three spatial directions are comparable.

The ratio of the dimensions of a particle in different

Spatial directions is characterized by the so-called aspect ratio, which describes the largest ratio of the dimension of a particle in two different spatial directions. Accordingly, the aspect ratio of ideal spherical particles is 1, while in the case of fibrous or platelet-shaped particles it is usually considerably greater than 1 and often reaches values of 100 or more. For platelet or fibrous

Nanoparticles therefore refers to the specification of the size to the maximum size in at least one spatial direction.

In principle, suitable nanoparticles are all types of inorganic or organic products which can be prepared in appropriate particle sizes and in some cases are also commercially available. Methods for producing such nanoparticles are known to those skilled in the art and described in the literature.

Spherical or spherical fillers are, for example, metal oxides, metal carbonates, metal sulfates or the like. Oxides of Ba, Al, Si, Zr, Ce and Ti and mixed oxides of these metals are preferred. As carbonates or sulfates may be mentioned here preferably the carbonates or sulfates of the alkali and alkaline earth metals.

Platelet-shaped fillers are e.g. in great variety in Plastics Additive Handbook (Hanser Verlag, 5th edition) in chapter 17.4.2 on pages 926 to 930, which will be referred to here for further details.

Needle-shaped or acicular particles are also in great variety in the

Literature has been described. Preferred acicular additives for use in the curing resins have an aspect ratio in the range of 2 to 100, preferably 2-20.

Wollastonite, xonotlite, sepiolite, attapulgite and Palygorskit can as

preferred acicular particles.

Fibrous fillers can have even higher aspect ratios than

having acicular fillers. Preference is given to fibrous nanoparticles having an aspect ratio in the range from 2 to 400, preferably from 5 to 200. A preferred group of fibrous nanoparticles are carbon-based particles, which are also known as carbon nanotubes.

Other suitable fibrous nanoparticles mentioned herein

are glass fibers or fibers based on Al, Ti, Mg, Al-silicate, Si or boron carbide fibers. Glass fibers are preferred here.

The nanoparticulate fillers are the layer that after installation of the

Lining tube is in contact with the flowing medium, in an amount of 0.001 to 0.09, preferably from 0.003 to 0.08 and particularly preferably from 0.005 to 0.05% by weight, based on the weight of the layer containing the nanoparticles , added.

The addition of the nanoparticles is carried out in a conventional manner, so that further information is unnecessary here. The above-mentioned particle size of the nanoparticles refers to the time of incorporation into the resin used for impregnation. Agglomeration may result in a different, generally larger particle size value in the finished lining tube.

As reaction resins for impregnation of the slivers preferably unsaturated polyester resins (UP resins) or vinyl ester resins (VE resins) are used, which may be dissolved, for example, in styrene and / or an acrylic ester. Suitable reaction resins are known to the person skilled in the art and commercially available in various designs.

Also suitable for producing the resin-impregnated fiber hoses are epoxy resins.

For the preparation of UP resins are polyunsaturated

Esterified dicarboxylic acids with diols, whereby low molecular weight products are obtained, which in the curing, usually with vinyl compounds (especially styrene) as comonomers to high molecular weight

Three-dimensional networks are polymerized.

As the acid component of UP resins and mixtures of

saturated and unsaturated bifunctional carboxylic acids or their anhydrides are used. So can as acid components

Adipic acid, glutaric acid, phthalic acid, isophthalic acid and terephthalic acid and their reactive derivatives can be used. Preferred unsaturated acids are maleic acid or its anhydride, fumaric acid and Diels-Alder adducts of maleic anhydride and cyclopentadiene. The diols used are preferably ethylene glycol, propanediol, dipropanediol, diethylene glycol, 2,2-dimethyl-1,2-propanediol, 1,4-butanediol, 2,2,4-trimethyl-1,3-pentanediol or bisphenol A. The comonomers required for crosslinking the UP resins may simultaneously be solvents for the low molecular weight oligomers; Styrene, which is used in many UP resins, can be mentioned as an example. Other examples of suitable comonomers are methylstyrene, vinyltoluene or

Methyl methacrylate.

Bifunctional monomers such as diallyl phthalate or divinylbenzene can

also be added. Other constituents of UP resins such as hardeners, polymerization initiators, accelerators, plasticizers and the like are known in the art and described in the literature, so that further statements are unnecessary here.

Vinylesterharze (also called VE resins), another group for

Impregnation of the fiber ribbons of suitable resins are obtained by preparing in a first stage an epoxide oligomer which is terminal

Vinyl ester groups such as acrylate or methacrylate groups and thus having reactive double bonds. In a second step, then the crosslinking, usually styrene as a solution and

Crosslinking agent is used. The crosslink density of VE resins is generally lower than that of UP resins because there are less reactive double bonds.

In the case of VE resins, the skeleton of the oligomer preferably has aromatic glycidyl ethers of phenols or epoxidized novolacs. Terminally, these are preferably esterified with (meth) acrylic acid.

Among the epoxy resins, preferred are those which can be cured by photochemically initiated cationic polymerization. In principle, however, any epoxy resins are usable, even those which can be thermally cured, if necessary with initiators.

The photochemical cationic curing is based on the principle that salts of certain photosensitive compounds are able to initiate cationic polymerizations photochemically. Cationic polymerizable

Monomers range from vinyl to ring-opening polymerizing

heterocyclic monomers; In principle, each cationic

polymerizable monomer are also photoinitiated cationically polymerized using suitable initiators.

The photochemically induced cationic polymerization overcomes this

The problem of the lack of latency of spontaneous cationic polymerization which makes it difficult to prepare storage stable spontaneously cationically curable products. The use of photochemical initiation allows continuous in situ generation of the active species upon irradiation, resulting in rapid and homogeneous cure at the desired time. The active initiating species in cationic polymerization is a cation, usually a proton or a strongly electrophilic carbocation. Suitable cations are, for example, Lewis or Bronsted acids.

A large number of initiators are known for the photochemically initiated cationic polymerization of epoxides. Here are only examples

Aryldiazonium salts, aryliodonium salts, diaryliodonium salts,

Diarylchloronium salts, diarylbromonium salts, triarylsulfonium salts, dialkylphenylacylsulfonium salts, phosphonium salts, N-alkoxypyridinium salts, pyridinium salts, pyrillium salts and thiapyrillium salts.

Aryldiazonium diarylhalonium

X = I, CI, Br triarylsulfonium

Phenacyltriphenylphosphonium

N-alkoxypyridinium pyrylium thiapyrilium The anions of these photocatalytic initiator compounds should have the lowest possible nucleophilicity in order to avoid impairment of the curing process.

Particular preference is given to using onium salts as initiators

are also commercially available. Of the diarylhalonium salts, the diaryliodonium salts are preferred, since these are easier to prepare than the corresponding chloronium or bromonium salts and, moreover, are thermally generally much more stable than these. Suitable aryliodonium salts are e.g. described in WO 96/13538, to here for further

Details are referenced.

Further preferred photoinitiators are aryldiazonium and

Arylsulfoniumsalze, as described for example in EP 770 608, which is hereby incorporated by reference.

The initiators mentioned above usually have

Absorption maxima at wavelengths in the range of 200 to 350 nm. Therefore, electromagnetic radiation in this wavelength range must be used for radiation curing. However, this is

Radiation in the UV range because of their high energy content in the

Application associated with certain risks. In addition, partially absorb the epoxy resins or their monomers even in this area relatively strong, which may result in the application to an insufficient formation of the required cations, because the radiation is absorbed by the present in a much larger amount of monomer molecules.

In some cases, it is therefore desirable to use for radiation curing light in the wavelength range above 350 nm and in particular in the range of 360 to 800 nm, preferably from 380 to 700 nm. The

Absorption of the initiators described above in this

Wavelength range is not sufficient, however, to produce the cations required for cationic curing.

Suitable sensitizers are known in the art and described in the literature. Basically, the sensitizers are also suitable for the cationic curing of dental application masses

Find use. Preferred sensitizers are alpha-dicarbonyl compounds (WO

96/13538), alpha-hydroxy ketones (US Pat. No. B 6,245,827), acylphosphine oxides and diacylphosphine oxides (WO 01/44873) and aromatic polycyclic hydrocarbons and aromatic amines (DE-A 26 93 395).

Epoxy resins which are photochemically initiated cationically curable are e.g. obtainable from epoxide compounds having on average more than one epoxide group per molecule, if appropriate with the concomitant use of hydroxyl-containing further monomers. Furthermore, as preferred

Epoxy compounds are called those in the molecule next to the

Epoxide still contain hydroxyl groups.

Suitable epoxides are, for example, cyclohexene oxide-containing compounds such as z-B. Epoxycyclohexanecarboxylates, as described in detail in US Pat. No. 3,117,099, to which reference is hereby made for details.

Another preferred group of epoxides are glycidyl ether derivatives, such as are obtainable, for example, by reaction of phenol derivatives having a plurality of hydroxyl groups with epichlorohydrin. These include in particular the diglycidyl ethers of 2,2-dimethyl-2,2-di- (4-hydroxyphenyl) propane (bisphenol A) or 2,2-di (4-hydroxyphenyl) propane (bisphenol F). Also, aliphatic epoxy compounds are suitable, e.g. epoxidized fatty acid derivatives.

Specific examples include octadecylene oxide, styrene oxide,

Cyclohexene oxide, vinylcyclohexene oxide, limonene dioxide, 1, omega-bis (3,4-epoxycyclohexylmethyloxy) alkanes, glycidol, glycidyl methacrylate,

Vinylcyclohexene dioxide, 3,4-epoxy-6-methylcyclohexylmethyl-3,4-epoxy-6-methylcyclohexene carboxylate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexene carboxylate, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate , Bis (3,4-epoxy-4-methylcyclohexanecarboxylic acid) hexyl diester, 1,3-bis (3,4-epoxycyclohexylethyl) tetramethyldisiloxane and bis (2,3-epoxycyclopentyl) ether.

In the polymerization, the epoxide ring is opened by the active cation and thereby started a continuous polymerization with chain growth. Corresponding products are in a variety of different

Variants described in the literature and commercially available.

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 art

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.

To the properties of the epoxy resins targeted to the desired

To set application, it has been proven to use epoxy compounds having more than one epoxide group in the molecule with compounds having more than one hydroxy group in the molecule in combination. This

Mixtures give better cured products, as it is too

Chain transfer reactions comes. The hydroxy compounds are therefore often referred to as hardener component in such mixtures.

The reaction resins used to impregnate the fiber ribbons can be thermally (usually by peroxide catalysts) or by radiation, e.g. by UV light with photoinitiators as described for example in EP-A 23623, cured. Also so-called

Combination curing with a peroxide initiator used for the thermal curing in combination with photoinitiators are possible and have proven to be particularly advantageous for large wall thicknesses of lining hoses. A method for such a combination curing is described for example in EP-A 1262708.

After impregnation, the resin can be suitably thickened, as described for example in WO-A 2006/061129. This increases the viscosity of the resin and thus improves the handleability and windability of the related fiber ribbons.

As slivers, containing the nanoparticles containing reaction resin

are impregnated to form the resin-impregnated fiber tube, in the lining tubes according to the present invention, in principle, all known in the art products in the form of woven, knitted, laid, mats or non-wovens, which may contain fibers in the form of long filaments or short fibers, usable , Corresponding products are known per se to those skilled in the art and are commercially available in great variety from various manufacturers.

Under 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.

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 aligned parallel to each other in a chemical carrier substance (the matrix) are embedded and are usually fixed by cover sheets from above and below and optionally by means of a step path or an adhesive. Due to the parallel orientation of the fibers, fiber fabrics have a pronounced anisotropy of the strengths orientation direction and perpendicular thereto, which for some

Applications of interest may be.

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 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 are among other things after the fiber material (eg., The polymer at

Chemical fibers), the bonding process, the type of fiber (staple or

Continuous fibers), the fiber fineness and the fiber orientation.

The fibers can be deposited defined in a preferred direction or be completely stochastically oriented as the random nonwoven fabric.

If the fibers have no preferred direction in orientation (orientation), it is called an isotropic nonwoven. Are the fibers in one? Direction arranged more frequently than in the other direction, then one speaks of anisotropy.

In the context of the present invention, felts within the meaning of the invention are also to be understood as felts. A felt is a fabric of a disordered, difficult to separate fiber material. In principle, felts are thus nonwoven textiles. From synthetic fibers and vegetable fibers, felts are generally produced by dry needling (so-called needle felting) 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.

Needle felt 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 grooving entangles the fibers with each other and subsequently retreats them chemically or with steam.

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

produce synthetic fibers. In addition to needling or in addition, the entanglement of the fibers with a pulsed water jet or with a binder is possible. The latter methods are particularly suitable for fibers without scale structure such as polyester or

Polyamide fibers.

Felts have a good temperature resistance and are usually moisture-repellent, which is particularly when used in

fluid-carrying systems can be beneficial.

[0077] Preference is given to the lining hoses according to the invention

Fiberglass fabric or fiberglass fabric used.

According to a preferred embodiment, the

Resin-impregnated fiber tube or the resin-impregnated fiber hoses on the liquid medium side facing a nonwoven layer. This can advantageously be completely or partially connected to the resin-impregnated fiber tube. The nanoparticles are in this embodiment

preferably completely or partially contained in this nonwoven layer. The amount of nanoparticles in this case is preferably 0.01 to 0.09% by weight, based on the weight of the nonwoven layer.

According to a preferred embodiment, the lining hoses according to the invention in the radial direction at least two different resin-impregnated fiber ribbons wound one above the other.

In a preferred embodiment, they differ

at least two different fiber ribbons in at least one of the parameters fiber incorporation, fiber orientation, fiber length or fiber type.

In the context of the present invention, fiber incorporation means the way in which the fibers are introduced into a carrier material.

The fiber ribbons used are selected so that the

Lining hose on the one hand has optimized for the particular application property profile and on the other hand, the simplest possible manufacturability on existing devices for producing such lining hoses is possible.

By the combined use of several different fiber ribbons with different structure in terms of fiber type, fiber length,

Fiber incorporation or fiber orientation, the property profile can be individually adapted to the particular application, without the need for elaborate remodeling of the devices used for the preparation. By choosing the order in which the at least two different fiber ribbons are wound, the radial and longitudinal profile of the lining hoses according to the invention can be designed individually 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

Called polyesters or polyamides or polyolefins (eg polypropylene), which are known to the person skilled in the art with their properties and are commercially available in great variety. For economic reasons, glass fibers are generally preferred; However, if a particular heat resistance is 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 proved to be advantageous if a first

Resin-impregnated sliver is selected from woven, knitted, laid, mats, felt or non-woven fabrics, the length of the fibers

can be selected according to the desired application. In this case, e.g. the first resin-impregnated sliver is a scrim made of parallel-oriented continuous fibers, preferably parallel-aligned, continuous glass fibers. Advantageously, the continuous fibers are aligned substantially perpendicular to the longitudinal direction of the resin-impregnated sliver. With such a first sliver preferably a second sliver can be combined in which fibers are arranged undirected in a random fiber mat. 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 of non-oriented fibers in the form of a random fiber mat stabilizes the inner surface due to the high resin absorption 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 wound resin-impregnated

Sliver the fiber fabric already needled or sewn with a random fiber mat, ie the first and the subsequent thereafter wound fiber slivers can also be constructed multi-layered. In some cases, it has proved to be advantageous if at least one of the following fiber slivers wound on a first sliver is constructed in a multi-layered manner in such a way that between two slices with undirected slits Fibers are an intermediate layer containing arranged parallel to the longitudinal direction of the sliver cut fibers, which preferably have a length in the range of 2 to 60, preferably from 3 to 30 cm.

According to a particularly preferred embodiment, the

lining hoses according to the invention a resin-impregnated

Fiber tube, which by winding at least one sliver with fibers oriented substantially perpendicular to the longitudinal direction of the sliver and at least one further sliver with parallel to

Longitudinal direction of the sliver oriented fibers is made.

According to a third preferred embodiment, a fleece,

preferably of polyolefin fibers, more preferably a polypropylene nonwoven used as at least a first resin-impregnated sliver, which with any other sliver of the above

described species can be combined.

Finally, according to a fourth preferred embodiment, a felt of the type described above is used as one of the slivers, which in turn may be combined with at least one further sliver of the type described above.

Basically, as mentioned, it is possible to combine any type of slivers that are intended for the intended application

Achieve property profile in the best possible way. Thus, fiber slivers with similar fiber binding (ie, for example, two fiber scrims or two fiber scrims) can be used which contain fibers of different chemical composition, different orientation or with different lengths. By way of example, short fibers in a sliver may be combined with long fibers in at least one other sliver wound thereon or fabrics may be combined with nonwovens, mats or knits. Also the use of two

Fiber fabrics with fibers of the same type of incorporation and the same orientation and length but different chemical composition are possible. This opens up a wide range of variation for the person skilled in the art within which he can virtually "tailor" the properties of the lining tube for the individual application. Based on the desired property profile, the person skilled in the art selects the suitable fiber ribbons for the lining hoses according to the invention with the aid of his specialist knowledge of the properties of the various types of fiber ribbons and is thus able to optimally fit to them

to provide customized products for individual applications.

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. 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.

According to a preferred embodiment, the lining hoses according to the invention have a possibly reinforced inner film tube on the basis of a thermoplastic material, which are removed after installation of the lining hose or in to be rehabilitated

Line system can remain. This inner film tube, if not removed after installation, contains 0.01 to 0.09% by weight, based on the total weight of the inner film tube, of nanoparticles as described above. It is also possible that both the inner film tube and other components of the lining tube contain nanoparticles. In principle, all polymers which can be processed into films or film tubes of the thickness or thickness required for the particular application are suitable as thermoplastic materials for the inner film tube. In addition, if curing is photochemical, it should be noted that the products have sufficient transmittance for the wavelength or wavelength range of the radiation used for curing. If the inner film tube after curing in the system to be rehabilitated should remain, is also to ensure the sufficient stability against the transported fluids as well as against the resin of the fiber tubes. In the majority of cases, however, the inner film tube is removed after curing. Basically, taking into account these criteria, 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 vulcanization required of the classic elastomers, thermoplastic elastomers have rubbery elasticity

Properties, which may be beneficial 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.

Particularly suitable and preferred thermoplastics are

For example, polyolefins and / or polyamides, wherein film tubes based on composite films of polyolefins and polyamides have proven to be advantageous in certain applications, since they have a better barrier effect than pure polyethylene films compared to the usually used as a solvent for the resins used styrene. Thus, the leakage of this solvent / monomer on the inside of the lining tube before curing can be better prevented.

According to a preferred embodiment, the inner

Foil tube on a reinforcement. This is chosen so that on the one hand optimized for the particular application

Property profile receives and on the other hand a simple as possible

Production of the lining hoses is given.

Particularly preferably, the inner film tube on a fiber-based reinforcement, in particular based on slivers as described above, or a nonwoven on.

The thickness of the reinforcement, for example the nonwovens, is advantageously in the

Range of 0.001 to 10 mm, more preferably in the range of 0.02 to 5 mm. According to a particularly preferred embodiment, the fiber-based reinforcement is a glass fiber fabric or a

Fibers for reinforcement.

According to a further preferred embodiment, the inner

Foil tube on a fleece lamination.

In lamination, the reinforcement is physically bonded to the film which forms the basis for the inner film tube. An example of this is the lamination of the reinforcement on the film, which leads to a partial melting of the film. Corresponding methods for lamination are known to the person skilled in the art and described in the literature, so that detailed explanations are unnecessary here.

In general, but without being limited thereto, the flat film from which the inner film tube is formed in the preferred embodiment has a thickness in the range of 40 to 800 pm, preferably in the range of 50 to 500 pm, and more preferably from 80 to 200 pm.

If the curing after the introduction into the to be rehabilitated

Care should be taken to ensure that the materials used (both for the flat film from which the

Inner film tube is formed as well as for the film strip) for the light used for irradiation are sufficiently permeable to the

Curing does not affect or prevent. In the case of thermal curing, this is not important.

[00105] According to another preferred embodiment, the

lining hoses according to the invention at least one outer film tube on the basis of a thermoplastic material.

Suitable outer film tubes for use in the

Liner hoses according to the invention are known and described in the literature. As an example, let us mention the ones already mentioned

WO95 / 04646 and WO 00/73692, wherein the reinforced outer film tubes according to WO 00/73692 a preferred

Embodiment represent.

In principle, the at least one outer film tube should have a

Provide sunscreen (to prevent premature and unwanted curing in the case of photochemical curing) and beyond the leakage Prevent resin from the resin-impregnated fiber hoses in the piping system to be rehabilitated. In particular, laid in the ground to be rehabilitated pipe systems this is usually desired or required already from aspects of environmental protection. It is also advantageous if the outer film tube a certain protection against mechanical

Damage occurs when the lining hose is drawn into the pipeline system to be renovated and thereby roughness in the surface or fractures the risk of mechanical damage to the

Hose bring with it.

As a material for the at least one outer film tube b) in principle, all thermoplastics, possibly taking into account the above-mentioned individual requirements in each case into consideration. The person skilled in the art will select the suitable thermoplastic according to the specified requirement profile. The same applies to the thickness and the possible use of reinforcing materials for the outer film tube on which the expert will decide on the basis of the individual case.

The lining tube according to the invention is preferably obtained by the winding of slivers on or around the inner

Foil tube using a winding mandrel or other suitable device.

In principle, however, it is also possible to use fiber hoses

Inanlagebringen the longitudinal edges of flat films and connecting these edges in a suitable manner. Corresponding methods are known to the person skilled in the art and described in the literature.

According to a preferred embodiment, the lining tube is obtained by the winding of slivers by means of a device as described in WO 95/04646.

[00111] The fiber slivers wound one above the other in the inventive

Lining hoses overlap at their edges in this embodiment, e.g. around 5 to 300 mm.

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

especially 30 to 300 m long, will be at the actual

Line rehabilitation introduced into the line system to be rehabilitated and there For example, with pressurized water or preferably inflated with air, so that it fits tightly against the inner wall of the pipeline system to be rehabilitated

snugly. Finally, the resin is thermally or preferably by means of hot water by means of UV light, as e.g. in EP-A 122 246 and EP-A 198 17 413, hardened.

The lining hoses according to the invention are suitable for the remediation of fluid-carrying systems of any kind and allow a fast

Redevelopment while minimizing downtime of the systems while they are being decommissioned. This reduces downtime compared to replacing damaged parts. Particularly advantageously, the lining hoses according to the invention can be used for the refurbishment of 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. Examples include piping systems for the transport of water or wastewater, which are laid in cities and communities in the ground and often under roads or other traffic routes. In the renovation by replacement, these pipes must be replaced by appropriate

Earthworks are first exposed and the traffic routes are not accessible to the traffic for longer periods of time, which leads to significant impairments, especially at higher traffic volumes. In comparison, the rehabilitation of such piping systems with the

lining hoses according to the invention without earth work in a few hours or days without extensive earthworks are performed.

The nanoparticles in the reaction resins used for impregnation lead to an improvement in the surface structure of the side of the

Lining hose, which is after removal of the possibly existing inner film tube in contact with the flowing medium, whereby the friction and thus the abrasive effect of the flowing medium can be reduced. If the inner film tube is not removed, the nanoparticles therein enhance the structure of the surface in contact with the flowing medium and reduce abrasion by the flowing medium. In this case it is not mandatory required that the resin used to impregnate the resin impregnated fiber tube also contain nanoparticles. The desired reduction in abrasion is already achieved by the equipment by the equipment of the inner film tube with nanoparticles.

Furthermore, the addition of nanoparticles leads to the addition

used reaction resin to improve the mechanical properties such as modulus of elasticity or strength.

The use of nanoparticles in the impregnating resin has the further advantage that the resins thus obtained usually have a very good permeability for the radiation used for curing, since the particle size of the nanoparticles is less than the wavelength of the radiation. This facilitates uniform and complete curing of the lining hoses according to the invention in comparison with resins containing larger particles.

Claims

claims

1. lining hose for refurbishing fluid-carrying systems, comprising at least one resin-impregnated fiber hose, and optionally a reinforced or unreinforced inner film tube on the side facing the flowing medium of the resin-impregnated

Fiber tube, wherein the lining tube in a layer which is in contact with the flowing medium after incorporation into the fluid-carrying system, 0.001 to 0.09 wt% nanoparticles, based on the weight of the layer containing the nanoparticles added.

2. lining hose according to claim 1, characterized in that the resin-impregnated fiber hose on the side facing the flowing medium has a non-woven layer.

3. lining hose according to claim 2, wherein the nanoparticles are partially or completely contained in the nonwoven layer.

4. lining hose according to one of claims 1 to 3, wherein the resin-impregnated fiber tube nanoparticles are added.

5. lining hose according to claim 1 or 2, wherein the inner

Foil tube nanoparticles are added.

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

characterized in that the nanoparticles at the time of incorporation have a size in at least one spatial direction in the range of 1 to 400 nm, preferably in the range of 10 to 300 nm.

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

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

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

in that the fiber tube is a woven, knitted fabric, scrim, mat or fleece.

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

in that the fiber tube is a glass fiber fabric or a glass fiber fabric.

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

characterized in that the nanoparticles are metal oxides, Metal carbonates, metal sulfates, wollastonite, xonotlite, sepiolite, attapulgite, palygorskite, or carbon nanotubes.

11. lining hose according to one of claims 1 to 10, characterized

characterized in that the inner film tube has a reinforcement.

12. lining hose according to one of claims 1 to 11, characterized

characterized in that it comprises an outer film tube.

13. Use of the lining hoses according to one of claims 1 to

12 for the rehabilitation of water and sewage piping systems.