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WO1999011966A1 - Revetement utilise pour renover des tuyaux - Google Patents

Revetement utilise pour renover des tuyaux Download PDF

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Publication number
WO1999011966A1
WO1999011966A1 PCT/GB1998/002683 GB9802683W WO9911966A1 WO 1999011966 A1 WO1999011966 A1 WO 1999011966A1 GB 9802683 W GB9802683 W GB 9802683W WO 9911966 A1 WO9911966 A1 WO 9911966A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeliner
fabric
edge portions
mpa
barrier layer
Prior art date
Application number
PCT/GB1998/002683
Other languages
English (en)
Inventor
Anthony Thomas Greatorex
Brian Arnold
Original Assignee
Texon Uk Limited
Texon Materiales, S.L.
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
Priority claimed from GBGB9718670.4A external-priority patent/GB9718670D0/en
Priority claimed from GBGB9718667.0A external-priority patent/GB9718667D0/en
Application filed by Texon Uk Limited, Texon Materiales, S.L. filed Critical Texon Uk Limited
Priority to AU89919/98A priority Critical patent/AU8991998A/en
Publication of WO1999011966A1 publication Critical patent/WO1999011966A1/fr

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

Definitions

  • the present invention relates to renovative pipeliner and, more particularly but not exclusively, to pipeliner used to renovate decayed sewerage pipes.
  • sewerage pipes may disintegrate. Such disintegration generally is progressive with initially minor spalling and erosion of the sewerage pipe surface. For example, cracks may appear in the sewerage pipe or segments may become detached from the pipeline surface. In view of this progressive degradation of the sewerage pipe, it is normal for regular inspection of the sewerage pipeline to be conducted. It will be appreciated that it is far easier to repair a still substantially functioning but eroded sewerage pipe rather than a collapsed sewerage pipe.
  • the present invention concerns renovative pipeliners which use a combination of a geotextile or a non-woven fibre felt impregnated with a suitable curable resin.
  • the geotextile or felt provides a matrix in which the curable resin is located.
  • the geotextile or felt is laminated with a barrier layer which may be polyurethane or surlyn and acts in collaboration with the cured resin to create a sealing barrier for the renovated sewerage pipe.
  • the renovative pipeliner can be impregnated with the curable resin off site and in such circumstances it has a shelf life during which it can be installed within the sewerage pipe to be renovated. Normally, when impregnated off site, the pipe will be transported in refrigerated conditions in order to extend this shelf life. In view of the inconvenience associated with off site impregnation it is more typical where possible to conduct impregnation just prior to installation of the pipeliner within the sewerage pipe to be renovated. Thus, it is necessary to transport the laminated felt in tubular form to the site of the sewerage pipe to be renovated.
  • the tube of laminated pipelining felt will generally be manufactured in uniform lengths such as 50 metres or 100 metres depending upon the pipeliner diameter.
  • the tube of laminated felt is formed into the pipeliner from a flat strip of material which is rolled such that opposed longitudinal edges of the strip are secured together to produce the tube. These longitudinal edges can be secured together by any appropriate technique including butt welds, sewing, adhesive or with a fillet reinforcement.
  • the laminated barrier layer as described previously, is a polyurethane or a surlyn film secured to the underlying felt by a hot lamination technique such that the barrier layer and the felt are united.
  • the strength of the bond between the barrier layer laminated to the underlying felt can create problems as outlined below.
  • the fabricated tube of laminated felt is transported as the pipeliner to the installation site typically in a coiled form either around a core bobbin or flat laid in a box. Both the coiling and uncoiling of the pipeliner tube can damage the pipeliner. Upon coiling, typically, the bond forming the tube between longitudinal edges of the strip of laminated felt may still not have matured completely and thus the "rough and tumble" of coiling the newly formed pipeliner may lead to distortion within the pipeliner as it relaxes with a slightly compliant bond between the edges of the longitudinal strip still not folly formed. Similarly, during impregnation, the pipeliner may be aggressively removed from its coil configuration and aggressively treated in order to ensure rapid and substantially full impregnation of the underlying felt with a curable resin.
  • the pipeliner installation techniques described in connection with the present invention utilise a water inflation technique known to those skilled in the art to be useful with geotextile laminates, for installation of the pipeliner within the sewerage pipe to be renovated.
  • the pipeliner is located within the sewerage pipe to be renovated through access covers, i.e. manholes in the sewerage pipe to be renovated.
  • the pipeliner will be installed between at least two such access points with branch access holes cut after curing of the resin.
  • one end will be closed in an appropriate manner and located within the access port, e.g.
  • the resin impregnated into the felt of the pipeliner may be of a cold cure nature where the resin incorporates a suitable activator such that after an acceptable period of time the resin has cured and creates a rigid pipeline.
  • the water used to inflate the pipeliner may be heated either in order to accelerate the curing of a resin held within the felt of the pipeliner where the resin is a cold cure resin or where the resin requires heating to effect a cure in any event.
  • Such hot curing of the resin may be necessary where low temperatures are envisaged during installation of the renovative pipeliner in order to achieve an acceptable installation time for the pipeliner within a sewerage pipe to be renovated.
  • the pipeliner Once installed and rigidised the pipeliner provides an acceptable renovative lining for the sewerage pipe in order to achieve many years of acceptable use.
  • branch pipe connections to the main sewerage pipe can be cut out using remote controlled cutting devices.
  • the barrier layer is typically made from a polyurethane or a surlyn film laminated to the felt which acts as a matrix for impregnation of the curable resin.
  • polyurethane is unacceptable for potable water supplies and thus limits application of a pipeliner made with such conventional polyurethane.
  • Polyurethane is quite robust in order to act as a barrier layer and to ensure abrasion does not puncture such layer, but, including a polyurethane barrier layer diminishes the flexibility of the constructed pipeliner. This may necessitate more accurate surveying of the pipeline to be renovated in order that the appropriate diameter renovative pipeliner is achieved.
  • the alternative barrier layer is less flexible than polyurethane and may have a reduced bond strength between the barrier layer and the underlying felt which can create separation problems.
  • the barrier layer should be able to meet the appropriate regulatory authority's criteria for use with potable water whilst having sufficient durability and flexibility to create the necessary barrier layer and abrasion resistance for the renovative pipeliner.
  • the pipeliner is generally transported, whether impregnated off site or not, in a coil format.
  • the tube of pipeliner is pressed substantially flat and coiled either about a bobbin core or in a serpentine coil within a flat box.
  • the flattening of the tube creates problems with regard to stretching of the laminated barrier layer at opposed edges of the flattened tube.
  • This stretching of the barrier layer and the underlying felt may create "work hardening" effects which dimmish the performance of the pipeliner in use.
  • the crushing of the felt at the stretched edges of the flattened tube during transportation can create a problem; such crushed felt will not so readily accept or hold curable resin during the impregnation stage.
  • barrier layer stretching through 180° during the flat tube transportation stage of the barrier layer, this inherently creates stress and strain within the barrier layer.
  • this barrier layer is a plastics material such as polyurethane or a surlyn film, prolonged exposure to such stretching may alter the physical attributes of the barrier layer along the two opposed strips of stretched barrier layer in the pipeliner. This alteration, although minor, may result in increased abrasion and resistance within the pipeliner upon installation. It will be appreciated that the pipeliner may be expected to transcend obstacles and bends within a pipeline to be renovated and so the pipeliner must be capable of accommodating such features within the pipeline to be renovated.
  • a pipeliner for renovation of a pipeline is typically constructed from a laminated geotextile or felt formed into a tube by securing opposed longitudinal edges of a strip of such felt together. It is important that the bond between these longitudinal edges is sufficiently robust and strong in order to withstand the various impregnation and installation steps of pipe renovation. Thus, as indicated, stitching, welding and adhesives along with reinforcing fillets have been used previously. It is also important to ensure that the rigidised pipeliner when installed creates an envelope of reinforcing cured resin held within the felt to provide acceptable constructional strength for renovation of the pipe.
  • a zone of fused non woven felt fibres is created which is, in effect, a solid rib of such fibre material.
  • This rib may have significant physical differences to the cured resin.
  • the rib may have a crystallinity which gives it a tendency to brittleness and so is subject to fracture under the stresses inherent in pipeliners.
  • This fillet can act as a bridge across the longitudinal bond.
  • Such fillets create their own additional problems in terms of complicating the bond configuration.
  • a longitudinal edge butt configuration would be used.
  • such a configuration can only depend on the edge surface contact area and so without using a weld or a strong adhesive, which in themselves will create the inconsistency problems described above, it is difficult to achieve a tubular pipeliner with quotable strength for reliable use as a renovative pipeliner.
  • the invention may be considered to provide a pipeliner suitable for insertion into a pipe to line it, the pipeliner including a fabric tube formed by securing longitudinal edge portions of a fabric sheet material together, said fabric sheet material being receptive to impregnation with a curable resin characterized in that the pipeliner further includes a fillet strip secured to the fabric edge portions by discontinuous bonding whereby to retain edges of the edge portions adjacent one another, said fillet strip being receptive to impregnation with said curable resin whereby to ensure a distribution of resin around the complete circumference of the pipeliner.
  • the discontinuous bonding of a pipeliner in accordance with the invention is provided by spaced regions of adhesive; more preferably the spaced regions are spaced stripes of hot-melt adhesive.
  • spaced regions of adhesive are spaced stripes of hot-melt adhesive.
  • edges of the edge portions of a pipeliner in accordance with the invention are not bonded to one another; they may abut one another or be spaced apart by a slight gap.
  • the edges may be bonded to one another eg by heat welding or hot-melt adhesive.
  • the fabric forming the tube is a non-woven textile fibre fabric which may conveniently be about 2-5 mm thick, preferably at least 3 mm thick, suitably about 4 mm thick.
  • a needle punched polyester fibre fabric is preferred but any suitable textile fibre may be used.
  • the fillet strip of a pipeliner in accordance with the invention is a non- woven textile fibre fabric, suitably generally similar in structure to the fabric of the tube; preferably the fillet strip is thinner than the fabric of the tube, suitably about 1-2 mm in thickness.
  • a preferred pipeliner in accordance with the invention is constructed using a non-woven fibre fabric laminated with a barrier film to form the fabric tube.
  • a preferred barrier layer comprises a thermoplastic polyolefin or a plastomer having a melt flow index measured at 230 °C under a load of 2.16 kg with a standard nozzle of 2.095 mm between 2g and lOg per 10 minutes and a flexural modulus between 60 MPa and 300 MPa at room temperature.
  • a pipeliner in accordance with the invention comprises a sealing tape bonded to an outer surface of the pipeliner ie in the preferred pipeliner the surface carrying the barrier, the opposite surface to that on which the fillet strip is bonded.
  • the sealing tape may, if desired include a reinforcing scrim, and will preferably include a barrier layer, conveniently of the same material as the barrier film of the pipeliner tubular fabric.
  • the invention may be considered to provide a pipeliner suitable for insertion into a pipe to line it comprising a fabric base laminated with a barrier layer and formed in a tube characterised in that the barrier layer comprises a thermoplastic polyolefin or a plastomer having a melt flow index measured at 230°C under a load of 2.16 kg with a standard nozzle of 2.095 mm between 2g and lOg per 10 minutes and a flexural modulus between 60 MPa and 300 MPa at room temperature the barrier layer comprising a thermoplastic polyolefin or a plastomer having a melt flow index measured at 230 °C under a load of 2.16 kg with a standard nozzle of 2.095 mm between 2g and lOg per 10 minutes and a flexural modulus between 60 MPa and 300 MPa at room temperature.
  • the barrier layer comprises a thermoplastic polyolefin or a plastomer having a melt flow index measured at 230°C under a load of 2.16 kg with
  • the barrier layer comprises a thermoplastic polyolefin resistant to degradation and having a migration quotient acceptable for potable water, having a melt flow index measured at 230°C under a load of 2.16kg with a standard nozzle of 2.095 mm in the order of 7g per 10 minutes and a flexural modulus of approximately 230 MPa at room temperature.
  • the barrier layer is made from Adflex C200F supplied by Montell Polyolefms.
  • the barrier layer laminated to the underlying fabric conveniently has an extrusion thickness of between 0.2 and 0.4 mm, preferably about 0.3 mm.
  • the melt flow index of a material suitable for the barrier layer is preferably from about 5 up to about 8, conveniently about 7g per 10 minutes.
  • the flexural modulus is preferably between about 75 MPa and 250 MPa, conveniently about 230 MPa.
  • the barrier layer of a pipeliner in accordance with the invention has a migration quotient acceptable for potable water.
  • preferred barrier layers are resistant to degradation and damage under conditions likely to be encountered in a pipeline which is to be renovated.
  • the invention may be considered to provide a method of making a pipeliner suitable for insertion into a pipe to line it comprising forming a fabric tube by securing together longitudinal edge portions of a fabric sheet material, optionally laminated to a barrier film, said sheet material being receptive to impregnation with a curable resin characterised in that the edge portions are secured together whereby to retain edges of the edge portions adjacent one another, by a fillet strip bonded by discontinuous bonding to the edge portions, said fillet strip being receptive to impregnation with said curable resin whereby, in use, to ensure a distribution of resin around the complete circumference of the pipeliner.
  • Figure 1 is a schematic view showing a method of manufacturing a pipeliner embodying the invention
  • Figure 2 is a view in section showing part of a pipeliner embodying the invention
  • Figure 3 is a view in section at A of Figure 1 ; and Figure 4 is a view in section at B of Figure of 1.
  • a conventional pipeliner includes a fabric tube formed by securing longitudinal edges of a flat sheet of fabric together in order to form the tube.
  • Current methods of joining the longitudinal edges to form the longitudinal bond rely on very high (400-600 °C) transient temperatures melting the fibres of the fabric at the longitudinal edge surfaces immediately prior to pressing together, and so forming a fusion bond.
  • This fabrication technique is difficult to control.
  • the longitudinal bond may be inadequate, or, alternatively melted so much that there are holes in the fabric.
  • the pipeliner is made by applying a coat of hot-melt adhesive to surfaces of fabric to be joined together.
  • hot-melt adhesive the adhesive uses a relatively low temperature of activation and so there is no detrimental effect upon the fabric.
  • care must be taken to ensure the adhesive layer is discontinuous to allow easy penetration and movement of a curable resin on impregnation into the pipeliner.
  • the hot-melt adhesive must be carefully chosen to ensure a relatively low-melt temperature sufficient to adhere adequately but to not damage the fabric or fillet strip and compatibility with a curable resin used.
  • hot-melt adhesive examples include BOSTIK Esterpow which has a crystalline melting point of 55-60°C (50:50 blend of 1112AF and 1108AF) and, preferably EMS 'GRILON' polyamide low melting adhesive (melting point of the order of about 120°).
  • FIGS 1 and 2 schematic illustration of how a pipeliner embodying the present invention is fabricated is depicted.
  • a sheet 1 of non-woven textile fibre fabric 6, attached to a laminated barrier film 9, is presented to an outer forming cone 2a and an inner forming cone 2b.
  • the forming cone 2a gathers the sheet 1 such that longitudinal edges (11,12) of the sheet 1 are brought into abutment.
  • a fillet strip 3 is also presented within the cone 2 such that it eventually rests upon edge portions 10, of the inside of the fabric tube below the longitudinal edges 11, 12 which are brought into abutment.
  • the fillet strip 3 is pre-coated with a hot-melt adhesive upon the surface facing towards the longitudinal edges in abutment.
  • the hot-melt adhesive is typically applied to the fillet strip 3 in longitudinal stripes such that the adhesive layer is discontinuous lateral to the longitudinal bond.
  • the combination of sheet 1 and fillet strip 3 are drawn through the cone 2a in the direction of the arrowhead. As can be seen, this assembly of the sheet 1 and fillet strip 3 comes into closer and closer engagement until presented to compressive rollers 4, where the assembly is consolidated and a sealing tape 5 applied to ensure a continuous barrier throughout the pipeliner in association with the laminated barrier film 9 attached to the fabric tube 6.
  • the tape 5 is heated to a relatively high temperature and attached to the barrier film 9 either side of the longitudinal bond through fusion.
  • the pre-coated hot-melt adhesive in its longitudinal discontinuous stripe format, such that when consolidated by the rollers 4 a strong bond is achieved.
  • the longitudinal edges (11, 12 are not themselves directly secured together, but adhesion is achieved through the edge portions, namely the shoulder flats, either side of those longitudinal edges, these edge portions which are being bonded to the fillet strip 3 using a hot-melt adhesive.
  • This hot-melt adhesive is activated by a heat gun 7 which normally provides hot air projected towards the fillet strip. This hot air is presented prior to the rollers 4 in order that the hot- melt adhesive has achieved the necessary tackiness for good bond strength.
  • the shoulder flats of the sheet 1 either side of the longitudinal edges brought into abutment can also be pre-coated with a discontinuous layer of hot-melt adhesive in addition to the coating of the fillet strip 3.
  • the hot air projected from the heat gun through the hollow cone 2 activates the hot-melt adhesive applied to the sheet 1 as well as that of the fillet strip.
  • the top surface of the cone 2 can become soiled by activated hot-melt adhesive and so become smeared. Such smearing will inherently reduce the distinctiveness of the discontinuous adhesive stripe format described as necessary to achieve easy penetration of curable resin into the fabric.
  • the fillet strip 3 will be 50 mm wide and 1 to 2 mm thick in order to ensure an adequate bond strength for pipeliner fabrication.
  • the stripes are about 5mm wide with 10 or 11 stripes equally spaced across the fillet strip preferably with a stripe adjacent each longitudinal edge of the fillet strip 3.
  • the tube must be sufficiently resilient to withstand the installation techniques described above.
  • the adhesive bond created by the fillet strip and hot-melt adhesive is discontinuous and in the form of longitudinal stripes, the area of bonding is not the foil area of overlap of the fillet strip over the longitudinal edge portions of the sheet 1.
  • a relatively wide fillet fabric will be necessary to achieve the bond resilience required.
  • the tape 5 also provides some bond strength which is limited by the elasticity of the material used to form the tape and so typically a scrim may be incorporated within the tape 5 to give additional lateral as well as longitudinal strength to the pipeliner.
  • the tape 5 is applied at a high temperature using hot air 8 projected at the tape 5 and the edges prior to the rollers 4.
  • the hot-melt adhesive onto the fillet strip 3 to provide spaced regions of adhesive in a variety of other patterns, determined by required performance.
  • herringbone, chevron, lateral or angled stripes, dots or any other pattern may be used, provided that the adhesive layer is discontinuous in order to allow curable resin penetration.
  • Such resin penetration ensures a complete circumferential resin structure after curing. This gives consistency of performance and eliminates a potential previous problem with renovative pipeliners, in that the longitudinal bond can be a line of weakness due to the reduced curable resin penetration etc.
  • the actual longitudinal faces of the sheet 1 are not specifically bonded together in the illustrative pipeliner other than by possible seepage of the hot-melt adhesive into contact with such faces.
  • no barrier whether it be as a result of fosion bonding these faces of the edge 1 or use of adhesive specifically applied to the faces, is created.
  • the curable resin can readily pass through the longitudinal edge faces unencumbered by fused fibre polymer or a continuous adhesive ribbon. It will be appreciated that any hot-melt adhesive which does penetrate and enter the abutment between the longitudinal faces will be sporadic and not continuous. In any event, it is likely that a thin ribbon of resin will congregate at the interface between the longitudinal edges of sheet 2 and this will become integral with the resin held within the material of the sheet.
  • the longitudinal faces of the sheet 1 are in abutment, it will be appreciated that by appropriate configuration it will be possible to provide an offset gap between these faces of a few millimeters and this gap could be partially entered by an appropriately shaped or constructed fillet strip 3 in order to further enhance structural integrity within the pipeliner. Alternatively the gap could be left and curable resin allowed to penetrate in order to provide a solid ribbing of such resin if required.
  • the sheet 1 comprises a base non-woven textile fibre fabric laminated with a film providing a barrier layer.
  • a polyester textile fibre is laid and needle-punched to provide a non-woven textile fibre fabric of a suitable weight, for example between 400 and 800 gsm.
  • the polyester fibres preferably are between 1 and 12 decitex, more preferably 2-6 decitex and preferably are between 30 and 120 mm in length, more preferably 40-60 mm.
  • the fabric is manufactured with a suitable needle punch density, preferably between 300 and 1200 punches/cm 2 more preferably 400-800 punches/cm 2 .
  • the illustrative method and pipeliner include a special barrier layer not previously known and fabrics laminated with this special barrier layer can be used to make pipeliners by most of the previously known methods.
  • Adflex C200F supplied by Montell Polyolefms.
  • Adflex C200F has extension characteristics at low extensions similar to polyurethane currently used as a barrier layer for pipeliners employed for renovation purposes.
  • Adflex C200F has a much greater stability in a wet environment inherent in sewerage pipes.
  • Adflex C200F has the potential to be approved for use with potable (drinking) water due to much reduced migration contamination.
  • Adflex C200F can be extruded and laminated to a non-woven textile fibre fabric, namely a needle felt in order to provide a pipeliner sheet material in which the Adflex C200F provides a barrier layer.
  • This sheet material can be formed into a pipeliner in accordance with conventional techniques and as described above.
  • opposed longitudinal edges of the laminated sheet are bonded together as described previously with reference to the accompanying drawings, in order to form a tube and this bond edge is typically sealed/reinforced with a seaming tape 5.
  • Adflex C200F film can be laminated with an appropriate reinforcing scrim in order to provide such a seaming tape for a pipeliner.
  • Adflex C200F is a thermoplastic polyolefin which features a high softness and a high fluidity. The following is a list of properties taken from the Adflex C200F promotional leaflet distributed as product data by Montell Polyolefms.
  • Adflex C200F Typical mechanical properties measured on standard injection- moulded specimens (ASTM D 2146) conditioned at room temperature (ASTM D 618 - procedure A).
  • the most important properties which define the exceptional performance of Adflex C200F for use in pipeliners are its melt flow index of 7g per 10 minutes at 230 °C and the flexural modulus of 230 MPa at room temperature. Such properties define how easily the Adflex C200F polymer film is laminated to an underlying fabric and its retention strength from that fabric in use.
  • the Adflex C200F polymer was extruded in an extruder such that the die was at a temperature of 200 °C and die rear of the extruder was at a temperature of 190°C.
  • the melt temperature of the Adflex C200F polymer was recorded at 196°C.
  • the Adflex C200F polymer was extruded as a film from the extruder.
  • the extruded film had a gauge of 0.3mm and was laminated to a pipeliner felt in a three roller cooling stack.
  • the roller temperatures were maintained at 40 °C.
  • the laminating pressure used to combine the extruded hot film with the pipeliner felt was approximately 80 psi acting on two 2.5 inch (about 6.4 cm) cylinders.
  • the pressure in the laminating unit is indeterminate with the heavy fabric felt employed to make pipeliner.
  • Adflex x 102S Another thermoplastic polyolefin polymer which may be satisfactory as a barrier layer in accordance with the invention is Adflex x 102S.
  • Adflex C200F This polymer, under the conditions noted is connected with Adflex C200F, above, is said to have a melt flow index in the order of 8g per 10 minutes and a fluxural modulus of approximately 80 MPa.
  • Adflex C200F and Adflex XI 025 certain other polymer materials which can be formed into films and have the so-called family name Plastomer, i.e. neither plastic nor elastomer but having properties somewhere there between, may replace the Adflex C20OF film described above.
  • plastomers are the Engage polymers supplied by DuPont/Dow; these plastomer films have similar properties, when appropriately treated, to Adflex C200F.
  • Adflex C200F being approved for use in food packaging, inherently is acceptable for potable water supply applications.
  • Adflex C20°F polymer film as a barrier layer 9 in pipeliner would greatly increase the range of potential use of film/felt pipeliner renovation technology.
  • the potentially increased film 9 to fabric 6 bond strength achieved by plastomers and Adflex C200F will also reduce pipeliner failure. It will be appreciated from the description above that the relatively traumatic installation and impregnation stages associated with fabric pipeliner can induce bond failure between the barrier film 9 and the underlying felt 6. This bond failure or weakness can be accentuated by curvature and corners within the pipe to be renovated. It will be appreciated that greater bond strength will reduce the number of such film to fabric bond failures.
  • the Adflex or plastomer film could be co-extruded as a sandwich with conventional polyurethane films; the Adflex C200F or plastomer polymer film providingsolutionality at the outside, with a layer of conventional polyurethane polymer film sandwiched between two thin external films.
  • a fabric tube 6 laminated with Adflex C200F, Adflex X102S, or plastomer polymer barrier layer 9 could be used in an unrigidised form as a temporary delivery conduit or pipe for food or beverage products, e.g. beer, syrups, fruit pulp or nectars. This temporary pipe could then be disposable, avoiding the necessity for sterilisation and/or clean down.

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

Abstract

Cette invention concerne un revêtement pouvant être introduit dans un tuyau en vue de le garnir. Ce revêtement comporte un tube de tissu formé par fixation des côtés longitudinaux d'une feuille (6) de tissu s'imprégnant d'une résine durcissable; un congé (3) fixé aux côtés du tissu au moyen d'une liaison discontinue, qui permet aux côtés (11, 12) de se retenir adjacents les uns des autres, et s'imprégnant de ladite résine durcissable dans le but d'assurer une répartition de la résine sur la totalité de la périphérie du revêtement. La couche barrière comporte un plastomère ou une polyoléfine thermoplastique dont l'indice de fusion, mesuré à 230 °C sous une charge de 2,16 kg au moyen d'une buse normalisée de 2,095 mm, est compris entre 2g et 10g par 10 minutes et dont le module d'élasticité en flexion est compris entre 60 MPa et 300 MPa à température ambiante.
PCT/GB1998/002683 1997-09-04 1998-09-04 Revetement utilise pour renover des tuyaux WO1999011966A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU89919/98A AU8991998A (en) 1997-09-04 1998-09-04 Renovative pipeliner

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9718670.4 1997-09-04
GB9718667.0 1997-09-04
GBGB9718670.4A GB9718670D0 (en) 1997-09-04 1997-09-04 Renovative pipeliner
GBGB9718667.0A GB9718667D0 (en) 1997-09-04 1997-09-04 Renovative pipeliner

Publications (1)

Publication Number Publication Date
WO1999011966A1 true WO1999011966A1 (fr) 1999-03-11

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PCT/GB1998/002683 WO1999011966A1 (fr) 1997-09-04 1998-09-04 Revetement utilise pour renover des tuyaux

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AU (1) AU8991998A (fr)
WO (1) WO1999011966A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2835395A1 (fr) * 2013-08-09 2015-02-11 Buergofol GmbH Feuille destinée notamment à être utilisée dans l'assainissement de canaux sans tranchée
US9897242B2 (en) 2014-10-08 2018-02-20 Burgofol Gmbh Tubular liner for sewer rehabilitation
WO2022029276A1 (fr) 2020-08-07 2022-02-10 Relineeurope Gmbh Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2835395A1 (fr) * 2013-08-09 2015-02-11 Buergofol GmbH Feuille destinée notamment à être utilisée dans l'assainissement de canaux sans tranchée
US20150045527A1 (en) * 2013-08-09 2015-02-12 Buergofol GmbH Film, especially for use in non-disruptive sewage pipe renovation
US9897242B2 (en) 2014-10-08 2018-02-20 Burgofol Gmbh Tubular liner for sewer rehabilitation
WO2022029276A1 (fr) 2020-08-07 2022-02-10 Relineeurope Gmbh Gaine de chemisage pour l'assainissement de systèmes de canalisations assurant l'acheminement de fluides et systèmes composites multicouches

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