WO2005095090A1 - Sheeting material - Google Patents
Sheeting material Download PDFInfo
- Publication number
- WO2005095090A1 WO2005095090A1 PCT/SE2005/000471 SE2005000471W WO2005095090A1 WO 2005095090 A1 WO2005095090 A1 WO 2005095090A1 SE 2005000471 W SE2005000471 W SE 2005000471W WO 2005095090 A1 WO2005095090 A1 WO 2005095090A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- strip
- elastomeric material
- thermoplastic film
- covering membrane
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
- B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
- B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
- B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
- B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
- B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
- B29C66/91933—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined higher than said fusion temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/12—Roof covering by making use of flexible material, e.g. supplied in roll form specially modified, e.g. perforated, with granulated surface, with attached pads
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/14—Fastening means therefor
- E04D5/141—Fastening means therefor characterised by the location of the fastening means
- E04D5/142—Fastening means therefor characterised by the location of the fastening means along the edge of the flexible material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/14—Fastening means therefor
- E04D5/148—Fastening means therefor fastening by gluing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
- B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/861—Hand-held tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
- B29K2105/246—Uncured, e.g. green
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0068—Permeability to liquids; Adsorption
- B29K2995/0069—Permeability to liquids; Adsorption non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
- B29L2031/108—Roofs
Definitions
- Polymeric covering membrane sheets are used as a single ply covering membrane for covering roofs. Such membranes are generally applied to the roof surface in a vulcanised or cured state. Because of outstanding weathering resistance and flexibility cured elastomeric roof sheeting has rapidly gained acceptance. Polymeric covering membrane sheets may also be used as geo membranes for forming waterproof bottoms of ponds, landfills, tanks etc. A problem in relation to the use of elastomers in roof sheeting or geo membrane sheeting is the lack of adhesive affinity between the individual sheets of the sheeting material. This is a serious problem because in applying the sheets to a surface it is usually necessary to splice the sheets together.
- This splice or seem is usually subjected to both short term and long term stresses, such as those caused by roof movement, heavy winds, freeze-thaw cycling and thermal cycling. Such stresses may manifest themselves in shear forces and peal forces, i.e. the seam peels back under severe stress conditions or may cause a partially open seam (often referred to as a fish-mouth condition) under less severe conditions .
- an adhesive for bonding elastomer covering sheets together must meet a number of requirements, which are extremely difficult to satisfy.
- a purpose of the present invention is to provide a covering membrane sheet which in a simple manner provides a limited risk that a shoe, a wind or another object may get a grip on a free edge of the covering membrane sheet when joined to another membrane sheet of the same kind.
- This purpose is achieved by a covering membrane sheet according to the preamble and characterised in that the strip of thermoplastic film is incorporated into the sheet of elastomeric material so that the outward surfaces of said strip are substantially flushed with the corresponding outward surfaces of said sheet.
- this covering membrane sheet is that, when joined to another covering membrane sheet, the free edge will be well protected against mechanical damage, such as from wind and persons walking on the membrane, and will be very firmly attached to the other covering membrane which minimises the risk of a delamination of a seam.
- Another advantage of this covering membrane sheet is that it reduces the amount of heat required to join the membrane sheet with another membrane sheet. This is due to the fact that the sheet of elastomeric material is thinner in the area of the strip and thus heat may travel quicker through the sheet of elastomeric material and to the strip and melt it such that it welds together with the strip of the other covering membrane sheet.
- the covering membrane sheet according to the invention is more elastic than those of the prior art, for instance compared to that of US 4,767,658.
- the reason for this is that the attachment between the strip and the sheet of elastomeric material is located closer to the centre of the sheet of elastomeric material in the invention.
- the strains that occur in the attachment between the strip and the sheet of elastomeric material when bending the covering membrane sheet are much lower than in the prior art.
- a further advantage of this covering membrane is that it will be easy to wind up on a transportation roll since there is no difference in thickness between the edge area and the area outside the edge area.
- the inventive covering membrane is very easy to apply to a surface, such as a roof or a ground surface, without causing the "waviness" that may occur in the prior art roofing membrane of US 4,767,658.
- the strip is welded to the sheet of elastomeric material at two interfaces being substantially perpendicular to each other.
- An advantage of this embodiment is that the strip is very firmly attached to the sheet of elastomeric material.
- Another purpose of the present invention is to provide an efficient method of manufacturing a covering membrane sheet which provides a limited risk that a shoe, a wind or another object may get a grip on a free edge of the covering membrane sheet when joined to another covering membrane of the same kind.
- This purpose is achieved by a method according to the preamble and characterised in the following steps: attaching a strip of thermoplastic film to the edge area of one sheet of elastomeric material, which is adhesively compatible with the thermoplastic film material, while said elastomeric material at said edge area is in a substantially uncured state, so as to form a pre-cured edge assembly in which the strip of thermoplastic film is incorporated into the sheet of elastomeric material so that the outward surfaces of said strip are substantially flushed with the corresponding outward surfaces of said sheet of elastomeric material, and curing said elastomeric material of said pre-cured edge assembly at a temperature over the peak melt temperature of the thermoplastic film so as to form a covering membrane sheet having a cured edge assembly
- thermoplastic film is thus incorporated into the sheet of elastomeric material so that the outward surfaces of said film are substantially flushed with the outward surfaces of said sheet.
- the strip is preferably welded to the sheet at two interfaces being substantially perpendicular to each other. This provides a very firm attachment of the strip to the sheet. Another object of the invention is to provide an efficient way of forming a laminate seam, which is robust towards mechanical damage.
- This object is achieved by a method of forming a laminate seam, using two covering membrane sheets as described above or made according to the above described method of forming a covering membrane sheet, the method of forming the laminate seam comprising the steps of: bringing the strip of thermoplastic film of one covering membrane sheet into overlapping contact with the strip of thermoplastic film of the other covering membrane sheet, and applying heat and pressure at the overlapping edge area so as to weld together the strips of thermoplastic film of each covering membrane sheet.
- the outward surfaces of strip 50 and 60 are substantially flush with the outward surfaces of sheet 10 and 20, respectively.
- This arrangement provides the advantage that the laminate seam will not be thicker than the sum of the joined sheets.
- the combined thickness of the thermoplastic strip and the elastomer sheet at the edge area may even be less than the thickness of the same elastomer sheet outside the edge area, providing for a laminate seam thickness smaller than the combined thickness of the adjoined elastomer sheets.
- a method of providing an elastomeric laminate seam between two covering membrane sheets comprises the steps of: attaching a strip 50; 60 of thermoplastic film to the edge area 30; 40 of one sheet of elastomeric material, which is adhesively compatible with the thermoplastic film material, while said elastomeric material at said edge area is in a substantially uncured state, so as to form a pre-cured edge assembly; curing said elastomeric material of said pre-cured edge assembly at a temperature over the peak melt temperature of the thermoplastic film so as to form a cured edge assembly; bringing the cured edge assembly into overlapping contact with a similar cured edge assembly, with the strips 50; 60 of the thermoplastic films of each respective assembly facing each other; applying heat and pressure at the overlapping edge areas 30; 40 of the cured edge assemblies so as to weld together the strips 50; 60 of the thermoplastic films of each respective assembly.
- a first roofing membrane sheet 10 When used for roofing purposes, a first roofing membrane sheet 10 is unrolled over the roof substructure in an otherwise conventional fashion, with the strip 50 of thermoplastic material of the cured edge assembly facing upwards, i.e. away from the roof substructure.
- a second roofing membrane sheet 20 is then applied onto the roof with its strip 60 of thermoplastic film of the cured edge assembly facing downwards, i.e. towards the roof substructure.
- the strips 50, 60 of thermoplastic film of the first and the second roofing membrane sheets 10, 20 are arranged to overlap each other, as shown in the figure. Next heat and some pressure are applied to the overlapped edges of the two roofing membrane sheets 10, 20 to form a seam.
- the overlapping edge areas 30, 40 of the cured edge assemblies may, for instance, be heated by way of hot air welding, and the pressure applied may be hand pressure, in the step of welding together the strips of thermoplastic films of each respective assembly.
- temperature is conveniently applied from, for instance, but not limited to, about 450 to 550°C using a hand-held heating gun and some pressure.
- the seam area should be heated to slightly above the melt temperature of the thermoplastic film.
- Pressure can vary widely, from, for instance, but not limited to, a minimum of about 0.1 bar to as high as 4 bar, typically as long as it is adequate to provide an acceptable, water tight seam. Numerous techniques which utilise heat and some pressure can be used to produce a fully acceptable seam as are known to those skilled in the art.
- a preferred example of such a technique is to use a heater commonly used for splicing plastic sheets.
- An example is to use a Leister Varimat hot air automatic welding machine which is available from LEISTER Process Technologies, Sarnen, CH .
- the Leister Varimat is commonly used for splicing TPO roofing membranes but could preferably be used to splice together the strips of thermoplastic film incorporated in the covering membrane sheets of the present invention.
- the elastomeric sheeting materials used in the present invention for forming the inventive covering membrane sheets may be any elastomer or elastomer blend with properties suitable for cover sheeting. A non- exhaustive list of such materials may comprise EPDM, EPR or other olefin type polymers.
- Preferred elastomeric sheeting materials are EPDM type polymers.
- the thermoplastic film used in the present invention may be any thermoplastic material that is adhesively compatible with the elastomeric sheeting material used.
- adheresively compatible materials it is meant materials which, at least- upon activation, will seal together at their interface.
- Preferred thermoplastic materials are thermoplastic olefins (TPO A), in particular blends of polypropylene copolymers and low density polyethylene.
- TPO A thermoplastic olefins
- the elastomeric material of the pre-cured edge assembly is preferably cured at a temperature that is about 140°C over the peak melt temperature of the thermoplastic film.
- seams were formed by bonding together layers of elastomeric sheeting material and thermoplastic films.
- the covering membranes described above with reference to the figure are roofing membrane sheets.
- the covering membrane sheets according to the invention are also useful in geo membrane applications.
- a geo membrane sheet according to the invention has the same principal design and function as the roofing membrane sheet 10, 20 described above. Examples of technical areas in which the geo membrane sheets according to the invention are useful include ponds, waste and waste water treatment, and agricultural applications.
- thermoplastic films or elastomers are examples of specific polymers provided herein, the examples having been provided merely to demonstrate the practice of the subject invention. Those skilled in the art may readily select other thermoplastic films, or other elastomers.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0400851A SE0400851D0 (en) | 2004-03-31 | 2004-03-31 | Sheeting Material |
SE0400851-2 | 2004-03-31 |
Publications (1)
Publication Number | Publication Date |
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WO2005095090A1 true WO2005095090A1 (en) | 2005-10-13 |
Family
ID=32105806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2005/000471 WO2005095090A1 (en) | 2004-03-31 | 2005-03-31 | Sheeting material |
Country Status (2)
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SE (1) | SE0400851D0 (en) |
WO (1) | WO2005095090A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2156940A1 (en) | 2008-08-18 | 2010-02-24 | Fedan NB N.V. | Method for forming a sealed joined of an article for containing pressurized fluids |
CN110435158A (en) * | 2019-07-02 | 2019-11-12 | 中铁十局集团第五工程有限公司 | A kind of composite geo-membrane welding procedure method for tank |
US20230322409A1 (en) * | 2019-10-25 | 2023-10-12 | Goodrich Corporation | Extruded elastomeric surface or erosion plys |
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US3660224A (en) * | 1969-02-03 | 1972-05-02 | Goodrich Co B F | Method for making adhere to each other cured layers of epm or epdm elastomers and/or butyl rubber and products thus obtained |
DE2510162A1 (en) * | 1975-03-08 | 1976-09-16 | Phoenix Gummiwerke Ag | Roof sealing strip made from base of synthetic rubber - reinforced with fibre mat and contg adhesive strips |
DE3316301A1 (en) * | 1983-05-04 | 1984-11-15 | Metzeler Kautschuk GmbH, 8000 München | Film-like tape for connecting elastomeric waterproof sheets |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2156940A1 (en) | 2008-08-18 | 2010-02-24 | Fedan NB N.V. | Method for forming a sealed joined of an article for containing pressurized fluids |
CN110435158A (en) * | 2019-07-02 | 2019-11-12 | 中铁十局集团第五工程有限公司 | A kind of composite geo-membrane welding procedure method for tank |
CN110435158B (en) * | 2019-07-02 | 2021-08-17 | 中铁十局集团第五工程有限公司 | Composite geomembrane welding construction method for water storage tank |
US20230322409A1 (en) * | 2019-10-25 | 2023-10-12 | Goodrich Corporation | Extruded elastomeric surface or erosion plys |
Also Published As
Publication number | Publication date |
---|---|
SE0400851D0 (en) | 2004-03-31 |
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