EP3174702A1 - Chemise destinée à la rénovation de systèmes de conduite de fluides - Google Patents

Chemise destinée à la rénovation de systèmes de conduite de fluides

Info

Publication number
EP3174702A1
EP3174702A1 EP15747141.8A EP15747141A EP3174702A1 EP 3174702 A1 EP3174702 A1 EP 3174702A1 EP 15747141 A EP15747141 A EP 15747141A EP 3174702 A1 EP3174702 A1 EP 3174702A1
Authority
EP
European Patent Office
Prior art keywords
resin
inner film
film
lining
reinforcement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP15747141.8A
Other languages
German (de)
English (en)
Inventor
Stefan Reichel
Christian Noll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SML Verwaltungs GmbH
Original Assignee
SML Verwaltungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SML Verwaltungs GmbH filed Critical SML Verwaltungs GmbH
Publication of EP3174702A1 publication Critical patent/EP3174702A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/752—Corrosion inhibitor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • the present invention relates to a lining hose for refurbishing fluid-carrying line systems.
  • a flexible fiber hose impregnated with a hardenable resin serving as a lining hose (also referred to as a liner) is introduced into the piping system.
  • a lining hose also referred to as a liner
  • the lining tube is widened so that it fits snugly against the inner wall of the pipeline system to be rehabilitated. Subsequently, the resin is cured.
  • Such a lining tube usually has an opaque outer protective film, an inner film permeable to at least certain wavelength ranges of electromagnetic radiation and a fiber-impregnated fiber band which is arranged between the inner film and the outer film.
  • the outer film tube is intended to prevent the resin used for impregnation from 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.
  • a lining hose is known, comprising an inner film tube, a impregnated with a resin sliver and an outer film tube on its inner side (ie, the resin-impregnated fiber sliver side facing) with a Faservlies is laminated.
  • resin-impregnated slivers are wound helically and overlapping to produce such lining hoses on an inner film tube.
  • the outer film tube is then also wound helically and overlapping around the resin-impregnated fiber tube.
  • the inner tube itself is also wound around a winding mandrel for simplified production.
  • WO 95/04646 discloses that a prefabricated inner film tube can be inflated and itself serve as a winding mandrel.
  • a prefabricated inner film tube is produced from a film strip, the film edges are joined together by welding or gluing together to form the inner film tube.
  • the inner film hoses are obtained by winding or by folding the longitudinal edges of flat films.
  • the present invention has the object to overcome the disadvantages of the prior art and to provide a lining tube for the rehabilitation of fluid-carrying piping systems, which allows a good tightness, reduced nucleation and improved flow resistance.
  • a lining hose for refurbishment fluid-carrying line systems with a seamless tubular inner film and at least one curable layer of at least one impregnated with hardenable resin sliver, wherein the tubular inner film with the resin-impregnated sliver or the resin-impregnated slivers has in contact (indirectly or directly) and on the surface in the installed state to the or the resin-impregnated sliver or fiber slivers facing surface functional groups and / or a reinforcement or reinforcement.
  • indirect contact should be understood to mean that the contact can also be made via interposed further element which, on the one hand, attach the inner film tube and, on the other hand, are itself bound to the resin-impregnated fiber band or the resin-impregnated fiber bands.
  • a seamless inner film or a seamless inner film tube a high density of the same or the same and a reduced nucleation is achieved due to lack of seams.
  • the flow resistance is reduced inside the liner tube.
  • Method L test with air
  • a pressure loss of max. 15 mbar is found. This pressure loss corresponds to a tightness of the lining hoses, which is sufficient for many applications.
  • piping systems of any kind for the transport of liquid or gaseous media examples include pipelines of any kind, piping systems for transporting media in chemical plants and production plants, water pipes and drinking water pipes and in particular also called sewage systems, which are laid underground or not visible.
  • the piping systems can be depressurised (so-called gravity pipelines) or pressurized.
  • the inner tube should have sufficient permeability to the radiation used for curing.
  • a first group of preferred polymers are, for example, homo- or copolymers of olefins, in particular ⁇ -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.
  • alkyl acrylates or alkyl methacrylates which are derived from alcohols having 1 to 8 carbon atoms, e.g. Ethanol, butanol or ethylhexanol, to name but a few preferred examples.
  • 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 have a random structure or have a block structure, whereby mixed forms are also possible (so-called tapered structures).
  • Corresponding products are described in the literature and are commercially available from various suppliers. Examples include the commercial product series Styrolux ® and Styroflex ® BASF SE
  • the at least one tubular inner film is a multilayer composite film based on olefin homo- or copolymeric or a multilayer composite film of these polymers and polyamides and / or the inner film has a film thickness of 100 to 1000 ⁇ , in particular from 100 to 500 ⁇ and more preferably from 100 to 300 ⁇ .
  • barrier layer is meant a layer which reduces or prevents the permeation of components of the resin used for impregnation of the fiber ribbons or of the resin itself or of solvents for the resin.
  • a leakage of these resin components or the resin itself from the inner surface of the inner film tube in the space in which the medium to be transported flows, is generally undesirable - in the case of drinking water pipes, for example, very low allowable limits are defined, which must be complied with.
  • At least one of the layers of a preferably used multi-layer composite film as inner film tube or a single-layer inner film comprises a barrier layer which prevents or reduces a diffusion of styrene (styrene is often used as a solvent or reactive diluent in the impregnation of the fiber ribbons used resins used).
  • Suitable film materials are known per se to the person skilled in the art and described in the literature.
  • the barrier effect of a film to a particular substance depends directly on the diffusion coefficient of the corresponding substance, the thickness of the film and the pressure difference on both sides of the film. A sufficient barrier effect is achieved when the amount of the substance in question that diffuses through the film within 24 hours does not exceed a predetermined limit.
  • Relevant limits for the maximum permitted permeability or permeability depend, among other things, on whether the pipeline systems to be rehabilitated are systems for transporting food or for transporting drinking water, where very low limit values have to be achieved. The person skilled in the art will accordingly select the appropriate film according to the predetermined limits of the application on the basis of his general knowledge.
  • Composite films of polyolefins and polyamides called a good Have blocking effect against the styrene frequently contained as a solvent in the resins used for impregnation.
  • polyamides e.g. the products of the condensation of one or more aminocarboxylic acids, such as aminocaproic acid, amino-7-heptanoic acid, amino-1 1-undecane-acid and amino-12-dodecanoic acid, or one or more lactams, such as caprolactam, oenantholactam and lauryl lactam and / or a or several salts or mixtures of diamines, such as hexamethylenediamine, dodecamethylenediamine, metaxylylenediamine, bis-p (aminocyclohexyl) methane and trimethylhexamethylenediamine,
  • aminocarboxylic acids such as aminocaproic acid, amino-7-heptanoic acid, amino-1 1-undecane-acid and amino-12-dodecanoic acid
  • lactams such as caprolactam, oenantholactam and lauryl lactam and / or a or several salts or mixture
  • diacids such as isophthalic acid, terephthalic acid, adipic acid, azelaic acid, suberic acid, sebacic acid and dodecanedicarboxylic acid.
  • copolyamides resulting from the condensation of at least two alpha, omega-aminocarboxylic acids or two lactams or a lactam and an alpha, omega-aminocarboxylic acid. Also cited are copolyamides which result from the condensation of at least one alpha, omega-aminocarboxylic acid (or lactam), at least one diamine and at least one dicarboxylic acid.
  • lactams mention may be made of those which contain 3 to 12 carbon atoms in the main ring and may optionally be substituted. Examples which may be mentioned are ⁇ , ⁇ -dimethylpropriolactam, ⁇ , ⁇ -dimethylpropriolactam, amylolactam, caprolactam, capryllactam and laurolactam. Examples of alpha, omega-aminocarboxylic acids include aminoundecanoic acid and aminododecanoic acid.
  • dicarboxylic acids examples include adipic acid, sebacic acid, isophthalic acid, butanedioic acid, 1,4-cyclohexyldicarboxylic acid, terephthalic acid, the sodium or lithium salt of sulfoisophthalic acid, dinner fatty acids (these dinner fatty acids have a dimer content of at least 98% and are preferably hydrogenated) and dodecanedioic acid HOOC - (CH2) called io-COOH.
  • the diamine may be an aliphatic diamine having 6 to 12 atoms or an aryldiamine and / or a saturated cyclic diamine.
  • hexamethylenediamine piperazine, tetramethylenediamine, octamethylenediamine, decamethylenediamine, dodecamethylenediamine, 1,5-diaminohexane, 2,2,4-trimethyl-1,4-diaminohexane, diaminepolyols, isophoronediamine (IPD), methylpentamethylenediamine (MPDM).
  • IPD isophoronediamine
  • MPDM methylpentamethylenediamine
  • BMACM Bis (aminocyclohexyl) methane
  • BMACM bis (3-methyl-4-aminocyclohexyl) methane
  • Copolyamides which may be mentioned are copolymers of caprolactam and laurolactam (PA-6/12), copolymers of caprolactam, adipic acid and hexamethylenediamine (PA-6 / 6,6), copolymers of caprolactam, laurolactam, adipic acid and hexamethylenediamine (US Pat.
  • PA-6/12 / 6,6) copolymers of caprolactam, laurylac-tam, 11 -aminoundecanoic acid, azelaic acid and hexamethylenediamine (PA-6 / 6,9 / 1 1/12), copolymers of caprolactam, laurolactam, 1 1 -aminoundecanoic acid, adipic acid and hexamethylenediamine (PA-6 / 6,6 / 1 1/12) and copolymers of laurolactam, azelaic acid and hexamethylenediamine (PA-6, 9/12).
  • Copolymers based on polyolefins and polyamides having a good barrier to styrene are known e.g. in EP 1 460 109, to which reference is also hereby made for further details.
  • EVOH copolymers vinyl alcohol
  • EVA copolymers vinyl acetate
  • copolymers based on olefins and acrylic esters are mentioned.
  • seamless inner film tube in the context of the present invention is a film tube to understand that is not made of slivers by folding, gluing, welding or winding. All of these manufacturing methods result in the interface where film tapes overlap or come to rest on one another by flipping edge regions that become joined, seams and thus increased flow resistances or increased nucleation risk.
  • Seamless films for use in liner hoses according to the present invention can be obtained, for example, by extrusion or injection molding with annular nozzles.
  • Mono- or coextrusion (simultaneous extrusion of multiple layers in a film) of seamless tubes can be mentioned here by way of example.
  • the coextrusion is therefore particularly suitable for the production of multilayer composite films which according to the invention are preferably used as inner film hoses.
  • those skilled in the art but also other production methods of seamless tubes are generally known, which are suitable for the production of a seamless inner film tube.
  • Preferred methods for producing seamless film tubes are extrusion blow molding or extrusion blow molding, which are methods known to the person skilled in the art, so that further details are unnecessary here.
  • a reinforcement or reinforcement can be applied over the entire area, so that a homogeneous product of uniform thickness and strength can be obtained, which also uniformly and over the entire surface of the sliver or connect the slivers.
  • a reinforcement or reinforcement can be applied over the entire area, so that a homogeneous product of uniform thickness and strength can be obtained, which also uniformly and over the entire surface of the sliver or connect the slivers.
  • the tubular inner film has functional groups and / or reinforcement or reinforcement on the surface facing the resin-impregnated sliver or slivers in the installed state.
  • Structure and construction of the inner film are not particularly limited in monomer selection.
  • an irradiation-curable resin is used in the fiber tube, it is preferable to use inner sheets which have high transmittance to the light used for irradiation. Since UV radiation having wavelengths in the range from 300 to 500 nm, preferably in the range from 350 to 450 nm, is generally used for the irradiation, the inner film should have the lowest possible extinction or absorption in these wavelength ranges.
  • the functional groups are intended to effect a connection of the inner film tube to the resin-impregnated fiber band or the resin-impregnated fiber bands. Therefore, the functional groups should be present on the surface as long as required for reaction with the fiber tube and preferably with the fibrous material or, in particular, with the curable resin. As far as the reaction takes place only during the curing (which has proven in some cases to be advantageous), this requires a corresponding stability of 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 no or only slight interactions between the inner film tube and the fiber tube are to be expected during installation and installation of the lining tube to the wall of the system to be rehabilitated, which have an adverse effect and, for example, wrinkles or similar Can cause problems.
  • Suitable functional groups include carboxylic acid, carboxylic acid anhydride, carboxylic acid ester, carboxylic acid amide, carboxylic acid imide, amino, hydroxyl, epoxide, urethane and oxazoline groups, to name but a few preferred representatives. Particular preference is given to carboxylic acid, carboxylic anhydride or epoxide groups.
  • Suitable reactive monomers for introducing 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 their esters, and also ethylene oxide and acrylonitrile, to name but a few To name 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 reacted with polymers or monomers without functional groups, e.g. grafted on.
  • a first group of preferred polymers are, for example, homopolymers or copolymers of olefins, in particular of ⁇ -olefins having preferably 2 to 8, in particular 2 to 6 carbon atoms.
  • Particularly preferred monomers are ethene, propene and octene, the latter also being readily copolymerizable with ethene.
  • Suitable comonomers for the mentioned olefins are, in particular, alkyl acrylates or alkyl methacrylates which are derived from alcohols having 1 to 8 C atoms, for example ethanol, butanol or ethylhexanol, to name but a few preferred examples. With these can then corresponding reactive comonomers are 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 trade name Lupolen® KR 1270.
  • Ethene / propene copolymers with suitable comonomers for introducing the corresponding functional groups are also suitable.
  • ethene / octene copolymers grafted with appropriate monomers to introduce functional groups.
  • Fusabond® NM493 D from DuPont may be mentioned here.
  • EPDM rubbers have proved to be advantageous, which can bring advantages in the introduction of the lining tube because of their elastic properties.
  • examples include terpolymers of usually at least 30 wt.% Ethene, at least 30 wt.% Propene and up to 15 wt.% Diene component (usually diolefins having at least 5 carbon atoms such as dicyclopentadiene, 1, 4-hexadiene or 5-ethylidenenorbornene).
  • Diene component usually diolefins having at least 5 carbon atoms such as dicyclopentadiene, 1, 4-hexadiene or 5-ethylidenenorbornene.
  • Royaltuf® 485 from Crompton may be mentioned here.
  • Suitable polymers are furthermore those of vinylaromatic monomers and dienes, for example styrene and dienes, it being possible for the dienes to be completely or partially hydrogenated, which have the corresponding functional groups.
  • Such copolymers may have a random structure or have a block structure, whereby mixed forms are also possible (so-called tapered structures).
  • Corresponding products are described in the literature and are commercially available from various suppliers. Examples include the commercial product series Styrolux® and Styroflex® BASF SE or specifically as anhydride functionalized styrene / ethene / butene copolymer Kraton® G 1901 FX from Shell.
  • the polymers of the inner film may also latently contain the functional groups, i. in a form in which the actual functional group is released only when hardened.
  • 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.
  • 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.
  • polyolefins such as polyethylene or polypropylene, polyamides, polyesters such as polybutylene terephthalate, polyethylene terephthalate or polyethylene naphthalate, polyvinyl chloride, polyacrylonitrile or even thermoplastic polyurethanes or mixtures of these polymers are suitable.
  • 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 properties, which may be advantageous in some applications.
  • polyolefin elastomers or polyamide elastomers may be mentioned here. Appropriate products are described in the literature and commercially available from various manufacturers, so that here detailed information is unnecessary.
  • Suitable adhesion promoters are e.g. Silanes, solutions or melts of polar or functionalized polymers, as well as suitable adhesives and bonding agent 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.
  • the above-mentioned functional groups can also be obtained by surface-treating the films forming the inner film tube with the aid of reactive gases such as oxygen, fluorine or chlorine. Owing to the action of these media, oxygen-containing functional groups of the aforementioned preferred type such as acid anhydride or epoxide groups are formed on the surface. It should be noted, however, that the distribution of the functional groups on the surface is difficult to control, so that there is a higher likelihood of inhomogeneous distribution than the previously described methods of co- or Pfopfpolymerisation or the use of adhesion promoters. Also, the type and amount of functional groups may be subject to greater variation in this variant.
  • the tubular inner film can have a reinforcement or reinforcement on the surface facing the resin-impregnated sliver or slivers in the installed state.
  • This reinforcement or reinforcing can replace the functional groups according to the embodiment described above wholly or partly and leads as the embodiment described above with functional groups to a connection of the inner film tube to the sliver.
  • the reinforcement according to this embodiment can be impregnated with resin, wherein preferably the same resin can be used, which is also used for the impregnation of the sliver (s).
  • the resin impregnation of the reinforcement can improve the connection to the resin-impregnated fiber ribbons.
  • fabrics are generally understood to mean sheet-like textile products comprising at least two fiber systems crossed at right angles, the so-called warp extending in the longitudinal direction and the so-called weft being 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 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 woven or knitted fabrics, which are characterized by the production process specific laying of the individual fibers or threads.
  • Nonwovens 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 non-woven (non-woven) clearly distinguishes them from woven fabrics.
  • Nonwovens are distinguished, inter alia, by 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.
  • the fibers can be deposited defined in a preferred direction or be completely stochastically oriented as the random nonwoven fabric.
  • the fibers have no preferred direction in orientation (orientation), it is called an isotropic nonwoven. If the fibers are arranged more frequently in one direction than in the other direction, then this is called anisotropy.
  • Felts can also be used as reinforcement for the double-sided reinforced film.
  • a felt is a fabric of a disordered, difficult to separate fiber material.
  • 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.
  • Needlefelt is usually made mechanically with numerous barbed needles, the barbs being arranged in the reverse manner as in a harpoon. This will force the fibers into the felt and the needle will come out easily. By repeated piercing the fibers are entangled with each other and then optionally treated chemically or with steam.
  • Felts can - like nonwovens - produce from virtually all natural or synthetic fibers.
  • 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 flake structure such as polyester or polyamide fibers.
  • Felts have a good temperature resistance and are usually moisture repellent, which may be advantageous when used in liquid-carrying systems.
  • the length of the fibers used in fiber-containing reinforcing agents per se is not subject to any particular restriction, 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.
  • glass fibers such as glass fibers, carbon fibers or synthetic fibers such as aramid fibers or thermoplastic fibers such as polyesters or polyamides or polyolefins (e.g., polypropylene) may be mentioned, which are known to those skilled in the art and are commercially available in a wide variety.
  • aramid fibers such as polyesters or polyamides or polyolefins (e.g., polypropylene)
  • thermoplastic fibers such as polyesters or polyamides or polyolefins (e.g., polypropylene)
  • polyesters or polyamides or polyolefins e.g., polypropylene
  • the compound of the reinforcement with the film can, for example thermally by welding or laminating or in known manner done with the help of suitable glue. It is essential that the reinforcement with the film has a sufficiently stable connection to avoid separation or delamination during the manufacture of the lining hose.
  • Resins that can be photochemically cured have proven to be advantageous in a number of applications.
  • the at least one curable resin is an unsaturated polyester resin, a vinyl ester resin or an epoxy resin, wherein the at least one curable resin is photochemically curable and contains a photoinitiator.
  • a photochemically curable resin comprising a photoinitiator curing of the resin with electromagnetic radiation, in particular with UV light is possible.
  • This allows for the introduction of the lining tube in a pipeline to be rehabilitated a particularly fast and efficient curing with minimal Energy.
  • Such reactive resins for curing with UV light with photoinitiators are described for example in EP-A 23634. Since UV light with wavelengths in the range from 300 to 500 nm, preferably in the range from 350 to 450 nm, is generally used for the irradiation, the inner film tube should have no or only a small extinction or absorption in these wavelength ranges.
  • the absorbance or absorption of films is usually characterized by transparency, i. E. the ability of the tested film to transmit electromagnetic waves of the wavelengths studied (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.
  • UV light is also advantageous for killing possibly existing germs and for sterilizing the lining tube.
  • the epoxy resin is a curable by photochemically initiated cationic polymerization epoxy resin.
  • thermally curable resins which are cured by increasing the temperature (eg steam curing or the like) are also suitable for the purposes of the present invention.
  • good temperature management is required prior to installing liner liners to prevent premature curing.
  • the lining hose must be stored and processed until it is cured at temperatures below the temperature required for curing. Depending on the external conditions, this may require cooling of the lining hoses between production and installation depending on the season.
  • the lining hose further comprises at least one outer film, which is arranged on the surface of the resin-impregnated fiber ribbons facing away from the inner film.
  • the same polymers as described above for the inner film can be used for this outer film.
  • the outer film can also have functional groups or a reinforcement or reinforcing to improve the connection to the resin-impregnated sliver or the resin-impregnated slivers on the surface facing this. Again, with respect to functional groups and reinforcement or reinforcement, what has been said above for the seamless inner tube tube applies.
  • the outer film tube Since the outer film tube is not in contact with the medium transported in the line system, the outer film tube can also have a seam. This allows e.g. the production of the outer film tube by winding or merging the longitudinal edges of flat films, which facilitates the technical production and introduction into the lining tube according to the present invention. But it is also possible to use a seamless tubular film for the outer film tube, which is then coated, for example, on the previously made lining tube of inner film and resin-impregnated slivers.
  • wound outer film tubes or film tubes obtained by gluing or welding of flat films is preferred.
  • the plastic material for the films of this optionally existing double-sided reinforced film tube is not subject to any fundamental restriction and the skilled person will select a suitable film material according to the intended application. It is advantageous if the film tube has a blocking effect against resin or resin components (for example solvent) present in the resin-impregnated fiber ribbons which are in contact with the double-sided reinforced film.
  • Suitable film materials are known per se to the person skilled in the art and described in the literature. Representative here are polyolefin films or composite films of polyolefins and polyamides, which have a good barrier effect against the styrene frequently contained as a solvent in the resins used for impregnation.
  • the reinforcement of the film armored on both sides is particularly preferably a fleece lamination.
  • nonwoven layer should also be understood to mean an arrangement of more than one nonwoven, i. E.
  • Each of the nonwoven layers may consist of a combination of several nonwovens. However, a nonwoven per nonwoven layer is preferred.
  • the armor reinforced on both sides or their reinforcement may, but not necessarily, be impregnated with resin.
  • At least one further outer film tube is arranged on a first outer film tube as described above, wherein the further outer foil tube or the further outer foil tubes may be reinforced on one or both sides, in particular laminated with a nonwoven layer or . could be.
  • the first film tube would no longer properly be described as an outer film tube, but as an "externally arranged" film tube, wherein arranged outside indicates that the film tube is arranged on the side facing away from the flowing fluid medium side of the fiber ribbons.
  • At least one of the reinforcements of two film hoses in contact with one another is usually soaked with resin.
  • An impregnation of a reinforcement in two mutually contacting reinforcements is usually sufficient to achieve impregnation or impregnation of the second reinforcing layer, which is for the connection of the reinforcements (and thus the film tubes) of advantage and also for the tightness after curing has beneficial effects.
  • the thickness of the various reinforcing layers, preferably non-woven layers, is not subject to any particular limitation per se. In in some cases have thicknesses of 10 ⁇ to 1000 ⁇ , preferably from 20 to 500 ⁇ and in particular from 25 to 150 ⁇ , and / or a basis weight of 10 gr to 300 gr per square meter, preferably from 15 to 200 gr per square meter and in particular from 20 to 80 gr per square meter proved to be advantageous. In some cases, thicknesses in the range of 40 to 90 ⁇ m have been found to be advantageous.
  • At least one opaque protective film is disposed on the outer films of the lining hoses according to the invention described above, which may also contain a trained as a diffusion barrier layer and the lining hose during transport from damage and premature curing (especially when using photochemically hardening resins) protects.
  • This layer or film remains after the introduction of the lining hose in the piping system to be rehabilitated in the pipe system when the lining hose is introduced by pulling without inversion (everting) in the pipeline system to be rehabilitated.
  • this protective film becomes an inner film when installed and is removed after introduction into the pipe system and before curing, since hardening by irradiation due to the impermeability of this hose for the used for irradiation Light is not possible.
  • the lining hose on the side facing the fluid medium of the curable layer of one or more slivers with one or more inner protective films in particular in the form of plastic films, be provided.
  • inner protective films are known per se to the person skilled in the art and described in the literature, so that further details are unnecessary here.
  • Lining hoses according to the invention with a seamless inner film tube have a one after the introduction into the fluid-carrying line system to be rehabilitated and subsequent curing particularly good tightness, which is particularly advantageous in applications in which the piping systems to be rehabilitated are in protected or protected areas.
  • the inner film tube after installation of the lining hose in the fluid-carrying pipe system to be rehabilitated need not necessarily be pulled out, but may remain in the pipe system (which is preferred according to the invention), since it is sufficiently firmly connected to the curable layer to rule out problems during subsequent operation.
  • the invention provides a use of a lining hose according to the invention for the rehabilitation of fluid-carrying piping systems, in particular lines for water or wastewater or for the rehabilitation of pipelines in industrial production plants.

Landscapes

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

Abstract

La présente invention concerne une chemise comprenant au moins un film interne tubulaire exempt de soudures, et au moins une couche durcissable constituée d'au moins une bande de fibres imprégnée de résine durcissable, ladite chemise étant destinée à la rénovation de systèmes de conduites de fluides sollicités en pression, le film interne tubulaire étant en contact avec la ou les bandes de fibres imprégnées de résine, et présentant sur la surface qui, à l'état monté, est orientée vers la ou les bandes de fibres imprégnées de résine, des groupes fonctionnels et/ou une imprégnation ou un renforcement.
EP15747141.8A 2014-07-31 2015-07-29 Chemise destinée à la rénovation de systèmes de conduite de fluides Ceased EP3174702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014110930.9A DE102014110930A1 (de) 2014-07-31 2014-07-31 Auskleidungsschlauch zur Sanierung fluidführender Leitungssysteme
PCT/EP2015/067448 WO2016016348A1 (fr) 2014-07-31 2015-07-29 Chemise destinée à la rénovation de systèmes de conduite de fluides

Publications (1)

Publication Number Publication Date
EP3174702A1 true EP3174702A1 (fr) 2017-06-07

Family

ID=53783220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15747141.8A Ceased EP3174702A1 (fr) 2014-07-31 2015-07-29 Chemise destinée à la rénovation de systèmes de conduite de fluides

Country Status (5)

Country Link
US (1) US20170227160A1 (fr)
EP (1) EP3174702A1 (fr)
JP (1) JP2017529495A (fr)
DE (1) DE102014110930A1 (fr)
WO (1) WO2016016348A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102074165B1 (ko) * 2019-06-14 2020-02-06 한우리산업주식회사 자동차용 내장소재 및 이를 제조하는 방법
DE102020126455A1 (de) 2020-10-08 2022-04-14 Relineeurope Gmbh Vorrichtung zur Aushärtung und Entkeimung von Auskleidungsschläuchen
IT202100024468A1 (it) * 2021-09-23 2023-03-23 Applied Resins S L Procedimento di risanazione non distruttiva in situ di condotte danneggiate e/o usurate con calze o guaine tubolari

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073692A1 (fr) * 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2931737A1 (de) 1979-08-04 1981-02-26 Basf Ag Verfahren zur herstellung von formkoerpern aus ungesaettigten polyesterharzen
US5205886A (en) * 1990-05-02 1993-04-27 Du Pont Canada Inc. Method of lining metallic pipe using concentric tubes of thermoplastic polymer and tear resistant material
DE4113002A1 (de) * 1991-04-20 1992-10-22 Teerbau Gmbh Strassenbau Verfahren zur herstellung eines armierten, haertbaren kunststoffschlauches und vorrichtung dazu
US5411060A (en) * 1992-04-03 1995-05-02 Chandler; Brian Composite pipe
DE59404285D1 (de) 1993-08-06 1997-11-13 Brandenburger Patentverwertung Verfahren zum herstellen eines rohrförmigen auskleidungsschlauches
DE4445166C2 (de) * 1994-12-17 1997-09-25 Rothenberger Rohrsanierung Gmb Aushärtbarer Schlauch und Verfahren für die Sanierung von Rohrleitungen
DE19700785C1 (de) * 1997-01-11 1998-03-12 Scheiff Gmbh Vorrichtung zur Herstellung eines Verbundschlauches
US6068725A (en) * 1997-11-26 2000-05-30 Insituform (Netherlands) B.V. Method of installation of a flexible cured in place lateral seal in an existing main pipeline
US6615875B2 (en) * 2000-08-30 2003-09-09 Owens Corning Composites Sprl. Liner for reinforcing a pipe and method of making the same
US20030113489A1 (en) * 2001-12-13 2003-06-19 Smith E. Peter Fiber reinforced cured in place liner for lining an existing conduit and method of manufacture
US7478650B2 (en) * 2002-06-19 2009-01-20 Saint-Gobain Technical Fabrics Canada, Ltd. Inversion liner and liner components for conduits
JP4528520B2 (ja) * 2003-12-11 2010-08-18 株式会社メーシック 枝管用補修材
US20060151042A1 (en) * 2005-01-12 2006-07-13 Stringfellow William D Pipe liner
US20080277012A1 (en) * 2007-05-10 2008-11-13 Anders Richard M Reinforcing Liner
US8591695B2 (en) * 2008-03-14 2013-11-26 Danny Warren Method and composition for lining a pipe
WO2010033297A2 (fr) * 2008-09-19 2010-03-25 Lightstream, L.P. Matériau de revêtement intérieur durci sur place, procédés et systèmes de fabrication
EP2699835A4 (fr) * 2011-04-18 2014-09-24 Fyfe Co Llc Revêtement extensible pour la protection et le renforcement de tuyaux existants
DE102011105592A1 (de) * 2011-06-27 2012-12-27 Sml Verwaltungs Gmbh Auskleidungsschlauch zur Sanierung fluidführender Systeme
DE102011105995B4 (de) 2011-06-30 2016-09-01 Sml Verwaltungs Gmbh Photochemisch härtbare Auskleidungsschläuche zur Sanierung fluidführender Systeme und deren Verwendung
EP2573442B1 (fr) 2011-09-23 2015-12-30 Saertex multicom GmbH Revêtement interne
JP6095278B2 (ja) * 2012-04-20 2017-03-15 吉佳エンジニアリング株式会社 既設管補修方法
JP6030937B2 (ja) * 2012-12-07 2016-11-24 芦森工業株式会社 管路の内張り材、及び、管路の内張り方法
ES2912607T3 (es) * 2012-12-10 2022-05-26 Buergofol GmbH Manguera de inserción para la rehabilitación de alcantarillado sin zanjas
DE102014110929A1 (de) * 2014-07-31 2016-02-04 Sml Verwaltungs Gmbh Auskleidungsschlauch zur Sanierung fluidführender Leitungssysteme

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073692A1 (fr) * 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire

Also Published As

Publication number Publication date
WO2016016348A1 (fr) 2016-02-04
US20170227160A1 (en) 2017-08-10
DE102014110930A1 (de) 2016-02-04
JP2017529495A (ja) 2017-10-05

Similar Documents

Publication Publication Date Title
DE102011105995B4 (de) Photochemisch härtbare Auskleidungsschläuche zur Sanierung fluidführender Systeme und deren Verwendung
EP2582520B2 (fr) Gaine d'encastrement
CA2790832C (fr) Methode de revetement d'un conduit au moyen d'un revetement a renfort tisse
EP3174703B1 (fr) Chemise destinée à la rénovation de systèmes de conduites de fluides
EP2573442A1 (fr) Revêtement interne
WO2017202421A2 (fr) Chemise durcissable pour l'assainissement de systèmes transportant des fluides
WO2011006618A1 (fr) Boyau de chemisage pour la rénovation de réseaux de canalisations de produits liquides, et procédé de fabrication correspondant
DE102009050084A1 (de) Mehrschichtiger Schlauch mit einer schlauchförmigen Innenfolie, Vorrichtung und Verfahren zu dessen Herstellung sowie dessen Verwendung
WO2016016348A1 (fr) Chemise destinée à la rénovation de systèmes de conduite de fluides
EP3233489B1 (fr) Chemise destinée à la rénovation de systèmes conduisant des fluides
EP2724064A2 (fr) Gaine de chemisage pour la rénovation de systèmes de transport de fluides
WO2015052101A1 (fr) Flexible de doublage pour la rénovation de systèmes de conduites guidant des fluides
JP2011104786A (ja) ライニング材
WO2022029276A1 (fr) Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches
DE102014110928A1 (de) Auskleidungsschlauch zur Sanierung fluidführender Leitungssysteme
DE102013111092A1 (de) Auskleidungsschlauch für die Sanierung von fluidführenden Leitungssystemen
DE102016120225A1 (de) Abdichtsystem und Verfahren zum Herstellen eines Einlegeschlauches mit einem solchen Abdichtsystem

Legal Events

Date Code Title Description
17P Request for examination filed

Effective date: 20170228

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20180704

RIC1 Information provided on ipc code assigned before grant

Ipc: B32B 27/32 20060101ALI20190313BHEP

Ipc: B32B 27/30 20060101ALI20190313BHEP

Ipc: B32B 27/38 20060101ALI20190313BHEP

Ipc: B32B 27/34 20060101ALI20190313BHEP

Ipc: B32B 5/02 20060101ALI20190313BHEP

Ipc: B32B 27/28 20060101ALI20190313BHEP

Ipc: F16L 55/165 20060101ALI20190313BHEP

Ipc: B32B 27/06 20060101ALI20190313BHEP

Ipc: B32B 1/08 20060101AFI20190313BHEP

Ipc: B32B 27/36 20060101ALI20190313BHEP

Ipc: B32B 27/18 20060101ALI20190313BHEP

Ipc: B32B 5/00 20060101ALI20190313BHEP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20190902