WO2022196108A1 - 溶着フィルム及びその製造方法 - Google Patents
溶着フィルム及びその製造方法 Download PDFInfo
- Publication number
- WO2022196108A1 WO2022196108A1 PCT/JP2022/002480 JP2022002480W WO2022196108A1 WO 2022196108 A1 WO2022196108 A1 WO 2022196108A1 JP 2022002480 W JP2022002480 W JP 2022002480W WO 2022196108 A1 WO2022196108 A1 WO 2022196108A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic resin
- resin film
- welding
- film
- welded
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 378
- 238000003466 welding Methods 0.000 claims abstract description 199
- 238000000034 method Methods 0.000 claims description 35
- 238000012360 testing method Methods 0.000 claims description 11
- 239000000088 plastic resin Substances 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 7
- 229920005672 polyolefin resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 4
- 229920001225 polyester resin Polymers 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- -1 alkyl vinyl ether Chemical compound 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
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- 229920006038 crystalline resin Polymers 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
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- 229920009441 perflouroethylene propylene Polymers 0.000 description 3
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- 238000004544 sputter deposition Methods 0.000 description 3
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- 239000000463 material Substances 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004812 Fluorinated ethylene propylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004813 Perfluoroalkoxy alkane Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
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- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Images
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
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
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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
- B29C66/435—Making large sheets by joining smaller ones or strips together
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
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- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
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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
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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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
- B29C65/5042—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 covering both elements 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
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
- B29C65/7888—Means for handling of moving sheets or webs
- B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
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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
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt 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
- B29C66/01—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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
- B29C66/12221—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment the two joint-segments being lapped
-
- 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
-
- 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
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
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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
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- 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
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Definitions
- the present disclosure relates to a welding film and a manufacturing method thereof.
- a wide film is usually used for films used for agricultural covering materials, membrane structures, etc.
- such a wide film is usually produced by connecting a plurality of industrially produced films.
- a method for connecting the films a method in which the ends of a plurality of films are superimposed and heat-pressed to weld the plurality of films, and a method in which the ends of the plurality of films are covered with a film for connection and heat-pressed. There is known a method of welding the plurality of films by doing so.
- Patent Document 1 describes a method for connecting a plurality of films having a hydrophilic treatment surface on one side. A method to do so is proposed.
- the present disclosure relates to a welded film in which tearing of connecting portions is suppressed, and a method for producing the same.
- Means for solving the above problems include the following aspects. ⁇ 1> a first thermoplastic resin film; a second thermoplastic resin film; a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the second thermoplastic resin film; A welding film comprising at least The first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welding portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second weld portion. is welded by A welding film, wherein the minimum distance between the first welding portion and the second welding portion is 2.0 mm or more.
- the positional relationship between the first thermoplastic resin film or the second thermoplastic resin film and the first welding portion or the second welding portion is the following (i) and (ii)
- the first welded portion and the second welded portion satisfies at least one selected from the group consisting of 0 ⁇ (L 1b /L 1a ) ⁇ 0.99 and 0 ⁇ (L 2b /L 2a ) ⁇ 0.99, wherein L 1b represents the width of the first welded portion, L1a is the width L1b of the first welded portion plus the minimum distance from the end of the first thermoplastic resin film on the side of the second thermoplastic resin film
- L2b represents the width of the second welded portion
- L2a is the width L2b of the second welded portion plus the minimum distance from the end of the second thermoplastic resin film on the side of the first thermoplastic resin film to the second welded portion.
- ⁇ 4> a first thermoplastic resin film; a second thermoplastic resin film; a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the second thermoplastic resin film; A welding film comprising at least The first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welding portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second weld portion.
- thermoplastic resin film or the second thermoplastic resin film is welded by
- the positional relationship between the first thermoplastic resin film or the second thermoplastic resin film and the first welding portion or the second welding portion is a group consisting of the following (i) and (ii) A welding film characterized by satisfying at least one selected from the above.
- the minimum distance between the end portion of the first thermoplastic resin film on the side of the second thermoplastic resin film and the first welding portion is 0.5 mm or more;
- the minimum distance between the first thermoplastic resin film side end of the plastic resin film and the second welded portion is 0.5 mm or more ⁇ 5>
- the first welded portion and the second welded portion satisfies at least one selected from the group consisting of 0 ⁇ (L 1b /L 1a ) ⁇ 0.99 and 0 ⁇ (L 2b /L 2a ) ⁇ 0.99, wherein L 1b represents the width of the first welded portion, L1a is the width L1b of the first welded portion plus the minimum distance from the end of the first thermoplastic resin film on the side of the second thermoplastic resin film to the first welded portion.
- L 2b represents the width of the second welded portion
- L2a is the width L2b of the second welded portion plus the minimum distance from the end of the second thermoplastic resin film on the side of the first thermoplastic resin film to the second welded portion.
- ⁇ 6> a first thermoplastic resin film; a second thermoplastic resin film; a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the second thermoplastic resin film; A welding film comprising at least The first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welding portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second weld portion.
- L 1b represents the width of the first welded portion
- L1a is the width L1b of the first welded portion plus the minimum distance from the end of the first thermoplastic resin film on the side of the second thermoplastic resin film to the first welded portion.
- a welding film characterized in that it represents a total length.
- ⁇ 7> According to JIS K6732: 2006, using a dumbbell-shaped test piece with a gauge length of 40 mm, the tensile elongation at break of the joint measured at a tensile speed of 200 mm / min is 150% or more.
- the welding film according to any one of ⁇ 1> to ⁇ 6>.
- thermoplastic resin film The ratio of the thickness of the connecting thermoplastic resin film to the thicknesses of the first thermoplastic resin film and the second thermoplastic resin film is 0.8 to 1.2, ⁇ 1>
- the first thermoplastic resin film, the second thermoplastic resin film, and the connecting thermoplastic resin film are each independently selected from the group consisting of fluororesins, polyester resins, and polyolefin resins.
- thermoplastic resin film Preparing a temporarily arranged body formed by spanning a connecting thermoplastic resin film between a first thermoplastic resin film and a second thermoplastic resin film; The temporary arrangement by a first heater arranged outside the connecting thermoplastic resin film and a second heater arranged outside the first thermoplastic resin film and the second thermoplastic resin film.
- a method for producing a welded film comprising At least one selected from the group consisting of the first heater and the second heater is configured not to come into contact with the portion between the first welding portion and the second welding portion throughout the step of thermocompression bonding. characterized by having A method for producing a welding film.
- thermocompression bonding at least one selected from the group consisting of the first heater and the second heater has a concave portion on the heat-press bonding surface;
- the thermocompression bonding surface forms the first welding portion inside the end portion of the first thermoplastic resin film on the side of the second thermoplastic resin film, and the second The second welding portion is formed inside an end portion of the thermoplastic resin film on the side of the first thermoplastic resin film, and the first welding portion and the second welding portion are separated by the recess.
- ⁇ 12> The method for producing a welding film according to ⁇ 11>, wherein the recess in at least one selected from the group consisting of the first heater and the second heater has a depth of 0.2 mm or more.
- ⁇ 13> The method for manufacturing a welding film according to ⁇ 11> or ⁇ 12>, wherein the width of the recess in at least one selected from the group consisting of the first heater and the second heater is 2.0 mm or more.
- ⁇ 14> The welded film according to any one of ⁇ 1> to ⁇ 9> or the production method according to any one of ⁇ 10> to ⁇ 13>, which is a film for membrane structures or an agricultural film. Welding film manufactured by
- a welded film and a method for manufacturing the same are provided in which tearing of the connecting portion is suppressed.
- FIG. 1 shows a schematic cross-sectional view of a welding film for describing a first embodiment
- FIG. The schematic sectional drawing of the welding film for demonstrating 2nd Embodiment is shown.
- the schematic sectional drawing of the welding film for demonstrating 3rd Embodiment is shown.
- 1 shows a schematic cross-sectional view of an example of a thermocompression bonding machine used for manufacturing a welding film.
- FIG. (a) shows a schematic cross-sectional view of a first heater, a second heater, and a welding film used for first thermocompression bonding in a conventional welding film manufacturing method.
- (b) shows a schematic cross-sectional view of a first heater, a second heater, and a welding film used for second thermocompression bonding in a conventional welding film manufacturing method.
- (a) shows a schematic cross-sectional view of the first heater, the second heater, and the welding film used for the first thermocompression bonding in one embodiment of the method for manufacturing the welding film.
- (b) shows a schematic cross-sectional view of the first heater, the second heater, and the welding film used for the second thermocompression bonding in one embodiment of the welding film manufacturing method.
- (a) shows a schematic cross-sectional view of the first heater, the second heater, and the welding film used for the first thermocompression bonding in one embodiment of the method for manufacturing the welding film.
- (b) shows a schematic cross-sectional view of the first heater, the second heater, and the welding film used for the second thermocompression bonding in one embodiment of the welding film manufacturing method.
- the term "process” includes a process that is independent of other processes, and even if the purpose of the process is achieved even if it cannot be clearly distinguished from other processes. .
- the numerical range indicated using "-" includes the numerical values before and after "-" as the minimum and maximum values, respectively.
- each component may contain multiple types of applicable substances.
- the content rate or content of each component is the total content rate or content of the multiple types of substances present in the composition unless otherwise specified. means quantity.
- a "unit" of a polymer means a portion derived from a monomer that exists in the polymer and constitutes the polymer.
- a unit is also a chemically modified structure of a certain unit after polymer formation.
- a unit derived from an individual monomer is referred to by a name obtained by adding "unit” to the name of the monomer.
- films and sheets are referred to as "films" regardless of their thickness.
- welding site refers to a region where two or more thermoplastic resin films are welded by heat.
- connection portion refers to a region near the connection of a plurality of thermoplastic resin films, including welded portions.
- the “cross-sectional view of the connecting portion” of the welding film means a cut surface of the connecting portion when the welding film is cut along the arrangement direction of the first thermoplastic resin film and the second thermoplastic resin film.
- the "width" of a film or portion thereof means the length in the direction along the alignment direction of the first thermoplastic resin film and the second thermoplastic resin film.
- melting point means the temperature corresponding to the maximum value of the melting peak measured by differential scanning calorimetry (DSC).
- the films according to the first to third embodiments may be collectively referred to as "films of the present disclosure”.
- a welding film includes a first thermoplastic resin film, a second thermoplastic resin film, the first thermoplastic resin film, and the second thermoplastic resin film. and a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the thermoplastic resin film for connection are welded by a first welding portion, and the second thermoplastic resin film The thermoplastic resin film and the thermoplastic resin film for connection are welded by a second welded portion, and the minimum distance between the first welded portion and the second welded portion is 2.0 mm or more.
- FIG. 1 illustrates the welding film according to the first embodiment.
- FIG. 1 shows a cross-sectional view of a connecting portion of the welding film 100.
- the welding film 100 in FIG. 1 spans the first thermoplastic resin film 1 and the second thermoplastic resin film 2, and the first thermoplastic resin film 1 and the second thermoplastic resin film 2.
- the first thermoplastic resin film 1 and the thermoplastic resin film 3 for connection are welded by a first welding portion 11, and the second thermoplastic resin film 3 is
- the thermoplastic resin film 2 and the connecting thermoplastic resin film 3 are welded together by a second welding portion 12 .
- the minimum distance D1 between the first welded portion 11 and the second welded portion 12 is 2.0 mm or more.
- the minimum distance D1 between the first welded portion 11 and the second welded portion 12 is 2.0 mm or more. Since it is secured, it is considered that the film elongation between the first welded portion 11 and the second welded portion 12 is maintained, and the welded film 100 is unlikely to tear at the connecting portion even if it is extended for a long period of time.
- a welding film according to a second embodiment of the present disclosure includes a first thermoplastic resin film, a second thermoplastic resin film, the first thermoplastic resin film, and the second thermoplastic resin film. and a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the thermoplastic resin film for connection are welded by a first welding portion, and the second thermoplastic resin film The thermoplastic resin film and the thermoplastic resin film for connection are welded by a second welding portion, and the first thermoplastic resin film or the second thermoplastic resin film and the first welding portion or the connecting thermoplastic resin film are welded together.
- the positional relationship between the second welding site and the positional relationship satisfies at least one selected from the group consisting of the following (i) and (ii).
- thermoplastic resin film on the side of the second thermoplastic resin film and the first welding portion is 0.5 mm or more;
- the minimum distance between the first thermoplastic resin film side end of the plastic resin film and the second welded portion is 0.5 mm or more.
- FIG. 2 illustrates the welding film according to the second embodiment.
- FIG. 2 shows a cross-sectional view of the connecting portion of the welding film 100.
- the welding film 100 in FIG. 2 spans the first thermoplastic resin film 1 and the second thermoplastic resin film 2, and the first thermoplastic resin film 1 and the second thermoplastic resin film 2.
- the first thermoplastic resin film 1 and the thermoplastic resin film 3 for connection are welded by a first welding portion 11, and the second thermoplastic resin film 3 is
- the thermoplastic resin film 2 and the connecting thermoplastic resin film 3 are welded together by a second welding portion 12 .
- the positional relationship between the first thermoplastic resin film 1 or the second thermoplastic resin film 2 and the first welding portion 11 or the second welding portion 12 is as follows (i) and at least one selected from the group consisting of (ii).
- the minimum distance between the end portion of the first thermoplastic resin film 1 on the side of the second thermoplastic resin film 2 and the first welding portion 11 is 0.5 mm or more.
- the minimum distance between the end portion of the second thermoplastic resin film 2 on the side of the first thermoplastic resin film 1 and the second welding portion 12 is 0.5 mm or more.
- At least one selected from the group consisting of the first thermoplastic resin film 1 and the second thermoplastic resin film 2 has a D2 of 0.5 mm or more, so that the corresponding first heat It is believed that the edge of the plastic resin film 1 or the edge of the second thermoplastic resin film 2 is less prone to tearing (hereinafter also referred to as "notch"), and as a result, tearing of the welding film 100 can be suppressed. .
- a welding film according to a third embodiment of the present disclosure includes a first thermoplastic resin film, a second thermoplastic resin film, the first thermoplastic resin film, and the second thermoplastic resin film. and a thermoplastic resin film for connection disposed across the first thermoplastic resin film and the thermoplastic resin film for connection are welded by a first welding portion, and the second thermoplastic resin film The thermoplastic resin film and the connecting thermoplastic resin film are welded by a second welding portion, and the positional relationship between the first welding portion and the second welding portion is 0 ⁇ (L 1b /L 1a ).
- L 1b represents the width of the first welded portion
- L1a is the width L1b of the first welded portion plus the minimum distance from the end of the first thermoplastic resin film on the side of the second thermoplastic resin film to the first welded portion
- represents the total length of L 2b represents the width of the second welded portion
- L2a is the width L2b of the second welded portion plus the minimum distance from the end of the second thermoplastic resin film on the side of the first thermoplastic resin film to the second welded portion. total length.
- FIG. 3 illustrates the welding film according to the first embodiment.
- FIG. 3 shows a cross-sectional view of the connecting portion of the welding film 100.
- the welding film 100 in FIG. 3 spans the first thermoplastic resin film 1 and the second thermoplastic resin film 2, and the first thermoplastic resin film 1 and the second thermoplastic resin film 2.
- the first thermoplastic resin film 1 and the thermoplastic resin film 3 for connection are welded by a first welding portion 11, and the second thermoplastic resin film 3 is
- the thermoplastic resin film 2 and the connecting thermoplastic resin film 3 are welded together by a second welding portion 12 .
- the positional relationship between the first welding portion 11 and the second welding portion 12 is 0 ⁇ (L 1b /L 1a ) ⁇ 0.99 and 0 ⁇ (L 2b /L 2a ) ⁇ 0.99. satisfy at least one selected from the group consisting of 99;
- the welding film 100 satisfies at least one selected from the group consisting of 0 ⁇ (L 1b /L 1a ) ⁇ 0.99 and 0 ⁇ (L 2b /L 2a ) ⁇ 0.99
- the first heat It is believed that the edge of the plastic resin film 1 or the edge of the second thermoplastic resin film 2 is less likely to have a tear (that is, a notch), and as a result, tearing of the welding film 100 can be suppressed.
- the inventors focused on the problem that conventional welding films may tear when stretched for a long period of time. Cracking was found to occur.
- One of the reasons for this is presumed to be that the thickness of the connection portion of the welding film becomes thin due to heat during welding, resulting in insufficient strength. Therefore, in order to suppress the decrease in the strength of the connecting portion, the welding method was investigated, and the welding films according to the first to third embodiments were proposed.
- thermoplastic resin films can be connected by spanning and welding the thermoplastic resin film for connection between the first thermoplastic resin film and the second thermoplastic resin film.
- the welding film of the present disclosure includes not only the first thermoplastic resin film and the second thermoplastic resin film, but also three or more thermoplastic resin films that are connected by a thermoplastic resin film for connection as a film before connection. can be anything.
- the number of thermoplastic resin films before connection (excluding the number of thermoplastic resin films for connection) can be appropriately set according to the application, for example, 2 to 100, 2 to 50, or 2 to 10. good.
- the connecting thermoplastic resin film is welded to the first thermoplastic resin film via the first welded portion, and is welded to the second thermoplastic resin film via the second welded portion.
- the welding joins the first thermoplastic resin film and the second thermoplastic resin film.
- the first welded portion and the second welded portion are on the same side of the connecting thermoplastic resin film.
- the hydrophilic surface of a thermoplastic resin film that has been subjected to a hydrophilic treatment tends to be insufficiently welded.
- thermoplastic resin film The first thermoplastic resin film, the second thermoplastic resin film, and the connecting thermoplastic resin film (hereinafter collectively referred to simply as "thermoplastic resin film") contain a thermoplastic resin.
- the materials of the first thermoplastic resin film, the second thermoplastic resin film, and the connecting thermoplastic resin film may be the same or different, and from the viewpoint of further suppressing tearing due to differences in elongation and strength depending on the site. are preferably the same.
- Thermoplastic resins include amorphous resins and crystalline resins.
- amorphous resins include polystyrene, polyvinyl chloride, polycarbonate, and polymethyl methacrylate.
- crystalline resins include fluorine resins, polyester resins, and polyolefin resins.
- fluororesins examples include ethylene-tetrafluoroethylene copolymer (hereinafter also referred to as "ETFE”), perfluoro(alkyl vinyl ether)-tetrafluoroethylene copolymer (hereinafter also referred to as "PFA”), hexafluoropropylene.
- ETFE ethylene-tetrafluoroethylene copolymer
- PFA perfluoro(alkyl vinyl ether)-tetrafluoroethylene copolymer
- hexafluoropropylene examples include hexafluoropropylene.
- FEP Tetrafluoroethylene copolymer
- PCTFE chlorotrifluoroethylene polymer
- PVDF vinyl fluoride polymer
- PVDF vinylidene fluoride polymer
- PVDF vinylidene fluoride polymer
- PVDF vinylidene fluoride polymer
- PVDF vinylidene fluoride polymer
- PVDF vinylidene fluoride-hexafluoropropylene copolymer
- PVDF vinyl fluoride polymer
- PVDF vinylidene fluoride polymer
- PVDF vinylidene fluoride polymer
- PVF vinylidene fluoride-hexafluoropropylene copolymer
- tetrafluoroethylene-propylene copolymer tetrafluoroethylene-vinylidene fluoride-propylene copolymer
- Polyester resins include polyethylene terephthalate resin, polybutylene terephthalate resin, polylactic acid resin, and the like.
- Polyolefin resins include polyethylene, ethylene- ⁇ -olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polypropylene, ethylene-propylene copolymer and the like. Each of these polyolefin resins may further have other units.
- thermoplastic resin a crystalline resin is preferable from the viewpoint of being excellent in scratch resistance, chemical resistance, etc., and from the viewpoint that high strength can be easily obtained by stretching or the like.
- the thermoplastic resin film is preferably a crystalline resin film.
- fluororesins are preferable from the viewpoint of excellent weather resistance and chemical resistance.
- the thermoplastic resin film is preferably a fluororesin film.
- the fluororesins at least one selected from the group consisting of ETFE, PFA, FEP, PCTFE, PVDF and PVF is preferable from the viewpoint of excellent weather resistance, specific gravity and price, and the group consisting of ETFE, PFA and FEP. At least one more selected is more preferable, and ETFE is particularly preferable.
- thermoplastic resin film may further contain components other than the thermoplastic resin, if necessary.
- Other components include flame retardants, ultraviolet absorbers, ultraviolet blockers, fillers, pigments, and the like.
- thermoplastic resin film may or may not be hydrophilized on one or both sides.
- a hydrophilic treatment for example, the flowability can be improved.
- a welding film having a hydrophilized surface is produced, from the viewpoint of sufficient welding, one surface of each of the first and second thermoplastic resin films is hydrophilized. It is preferable to weld the connecting thermoplastic resin film on the non-bonded side.
- Methods of hydrophilic treatment include wet methods and dry methods.
- the wet method includes a method of applying a hydrophilic substance solution with a roller, a method of spray coating the solution, a method of applying the solution with a brush, a method of applying the solution with a coating machine, and the like. .
- a method of coating with a hydrophilic substance solution using a coating machine or a method of coating by spraying is preferable.
- the dry method include a sputtering method, a vacuum deposition method, a CVD method, an ion plating method, and the like using a hydrophilic substance. From the viewpoint of high productivity and excellent durability of hydrophilicity, the sputtering method of a hydrophilic substance is preferable.
- hydrophilic substance examples include inorganic colloid sols such as SiO 2 and Al 2 O 3 , hydrophilic resins such as polyvinyl alcohol and acrylic acid, and metal oxides such as Si, Sn, Ti, Nb, Al, and Zn. be done.
- a sputtering method for metal oxides such as Si, Sn, and Ti is preferred. In this case, it is more preferable to use metal oxides of Si and/or Sn.
- the thickness of the thermoplastic resin film can be appropriately set according to the application, and may be 10 to 1,000 ⁇ m, 20 to 800 ⁇ m, or 30 to 500 ⁇ m.
- the thickness of the connecting thermoplastic resin film relative to the thickness of the first thermoplastic resin film and the second thermoplastic resin film before welding
- the thickness ratio is preferably 0.8 to 1.2, more preferably 0.9 to 1.1. Since the thickness of the first and second thermoplastic resin films to be connected and the thickness of the thermoplastic resin film for connection are relatively close, even if a tensile stress is applied to the welding film, the stress is concentrated on a specific portion. It is presumed that one factor is that In addition, when the thickness of the first and second thermoplastic resin films to be connected and the thickness of the connecting thermoplastic resin film are relatively close, the heaters on the first and second thermoplastic resin film sides during welding. and the temperature of the heater on the side of the thermoplastic resin film for connection can be easily set to be close to each other.
- the width of the first and second thermoplastic resin films before welding can be appropriately set according to the application, manufacturing equipment, etc., and may be 0.5 to 3 m, or 0.8 to 2.5 m. Well, it may be 1.1 to 1.6 m.
- the width of the connecting thermoplastic resin film is not particularly limited.
- the width of the connecting thermoplastic resin film is preferably 10 mm or more, more preferably 20 mm or more, and even more preferably 30 mm or more, from the viewpoint of securing a sufficient welding portion. From the viewpoint of downsizing the device used for welding, the width of the connecting thermoplastic resin film is preferably 100 mm or less, more preferably 50 mm or less, and even more preferably 40 mm or less.
- the first welded portion and the second welded portion are typically located near the ends of the first thermoplastic resin film and the second thermoplastic resin film, respectively.
- the width of the overlapped portion of the first thermoplastic resin film and the connecting thermoplastic resin film is preferably 5 to 50 mm, more preferably 5 to 25 mm, even more preferably 5 to 15 mm. The same applies to the width of the overlapped portion of the second thermoplastic resin film and the connecting thermoplastic resin film.
- the thickness of the welded part is not particularly limited. From the viewpoint of improving the strength of the welded portion and the film strength, the film thickness at the first welded portion is the sum of the thicknesses of the first thermoplastic resin film before welding and the connecting thermoplastic resin film. is preferably 80 to 100%, more preferably 90 to 100%, even more preferably 95 to 100%. The same is true for the film thickness at the second weld site.
- each welding part is not particularly limited.
- the width of each welding portion is preferably 3 mm or more, may be 5 mm or more, or may be 10 mm or more. From the viewpoint of miniaturization of the device used for welding, the width of each welding portion is preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less.
- the ends of the connecting thermoplastic resin film have a certain portion left unwelded.
- the width of the non-welded portions of the connecting thermoplastic resin film ends is preferably 0.1 to 10 mm, more preferably 0.3 to 5 mm, even more preferably 0.5 to 3 mm.
- the minimum distance between the first welded portion and the second welded portion is preferably 2.0 mm or more.
- the minimum distance between the first welded portion and the second welded portion is 2.0 mm or more.
- the minimum distance is more preferably 2.5 mm or longer, and even more preferably 2.8 mm or longer.
- the minimum distance is preferably 10.0 mm or less, more preferably 8.0 mm or less, and even more preferably 6.0 mm or less.
- the positional relationship between the first thermoplastic resin film or the second thermoplastic resin film and the first welded portion or the second welded portion is the following (i) and (ii): It is preferable to satisfy at least one selected from the group consisting of (i) The minimum distance between the end portion of the first thermoplastic resin film on the side of the second thermoplastic resin film and the first welding portion is 0.5 mm or more. (ii) The minimum distance between the end portion of the second thermoplastic resin film on the side of the first thermoplastic resin film and the second welding portion is 0.5 mm or more.
- the welding film according to the second embodiment of the present disclosure satisfies the above conditions.
- the minimum distances in (i) and (ii) may each independently be 0.7 mm or more, or 0.9 mm or more. From the viewpoint that the non-welded portions at the ends of the first and second thermoplastic resin films in the connecting portion hardly affect workability, the minimum distance in (i) and (ii) is 10.0 mm or less. is preferred, 5.0 mm or less is preferred, and 3.0 mm or less is more preferred.
- the positional relationship between the first welded portion and the second welded portion is 0 ⁇ (L 1b /L 1a ) ⁇ 0.99 and 0 ⁇ (L 2b /L 2a ) ⁇ 0.99. It is preferable to satisfy at least one selected from the group.
- L 1b represents the width of the first weld site
- L1a is the total length obtained by adding the minimum distance from the end of the first thermoplastic resin film on the second thermoplastic resin film side to the first welded portion to the width L1b of the first welded portion.
- the welding film has at least meet one.
- (L 1b /L 1a ) and (L 2b /L 2a ) are each independently preferably 0.33 or more, more preferably 0.50 or more, and 0.80 or more. More preferred.
- (L 1b /L 1a ) is preferably less than 0.99, more preferably 0.95 or less.
- (L 1b /L 1a ) and (L 2b /L 2a ) are each independently preferably 0.33 or more and less than 0.99, more preferably 0.50 to 0.95, and 0.50 to 0.95. 80 to 0.95 is more preferred.
- the welded film of the present disclosure is measured under conditions of tensile speed of 200 mm/min using a dumbbell-shaped test piece with a distance between gauge lines of 40 mm according to JIS K6732:2006, from the viewpoint of being able to satisfactorily suppress tearing of the connecting portion. It is preferable that the tensile elongation at break of the connected portion is 150% or more. Specifically, the tensile elongation at break of the connecting portion can be measured by the method described in Examples. The tensile elongation at break of the connecting portion is more preferably 180% or more, still more preferably 250% or more, and particularly preferably 280% or more.
- the upper limit of the tensile elongation at break of the connecting portion is not particularly limited, and from the viewpoint of the strength of the welded film, the tensile elongation at break of the connecting portion is preferably 500% or less, more preferably 350% or less, and 280% or less. More preferred.
- the tensile strength of the connecting portion of the welding film is preferably 25 MPa or higher, more preferably 30 MPa or higher, and even more preferably 35 MPa or higher, from the viewpoint of being applicable to applications requiring high strength such as membrane structure applications.
- the upper limit of the tensile strength of the connecting portion is not particularly limited, and the higher the better.
- "Tensile strength” is a tensile breaking stress measured at a tensile speed of 200 mm/min using a dumbbell-shaped test piece with a gauge length of 40 mm according to JIS K6732:2006.
- the manufacturing method of the welding film is not particularly limited.
- the first welding portion and the second welding portion are heat-pressed, and the portion sandwiched between the first welding portion and the second welding portion is heat-pressed.
- a method that is not used may be adopted.
- a method for producing a welding film includes preparing a temporary arrangement body in which a connecting thermoplastic resin film is bridged between a first thermoplastic resin film and a second thermoplastic resin film (hereinafter , also referred to as a “temporary arrangement body preparation step”), a first heater arranged outside the connecting thermoplastic resin film, the first thermoplastic resin film and the second thermoplastic resin film.
- thermoplastic resin film and the connecting thermoplastic resin film are welded by heating and press-bonding the temporary arrangement body by a second heater arranged outside the Forming a second welding portion where the second thermoplastic resin film and the connecting thermoplastic resin film are welded together (hereinafter also referred to as a “heating and pressing step”); At least one selected from the group consisting of the heater and the second heater may be configured not to come into contact with the portion between the first welding portion and the second welding portion throughout the step of thermocompression bonding. .
- a temporary arrangement body is prepared by bridging the connecting thermoplastic resin film between the first thermoplastic resin film and the second thermoplastic resin film.
- "Temporarily arranged body” means an arranged body composed of a first thermoplastic resin film, a second thermoplastic resin film, and a thermoplastic resin film for connection, which is not welded. .
- the above-mentioned matters can be applied.
- the positional relationship between the first and second thermoplastic resin films and the connecting thermoplastic resin film in the temporary arrangement body can be set so that the produced welding film has the above-mentioned aspect.
- the temporary arrangement body is thermocompression bonded by the first heater and the second heater, and the first welding portion where the first thermoplastic resin film and the connecting thermoplastic resin film are welded, and the first A second welding portion is formed where the thermoplastic resin film of No. 2 and the connecting thermoplastic resin film are welded.
- the heater arranged outside the connecting thermoplastic resin film is referred to as a “first heater” for convenience, and the outside of the first thermoplastic resin film and the second thermoplastic resin film. is called a "second heater” for convenience.
- the details of the first welded portion and the second welded portion can be applied as described above.
- thermocompression bonding may be performed in two or more steps.
- the thermocompression includes a first thermocompression and a second thermocompression.
- the first thermocompression bonding and the second thermocompression bonding may be performed at the same temperature or at different temperatures.
- the second thermocompression bonding may be performed at a lower temperature than the first thermocompression bonding.
- the degree of welding can be adjusted depending on the part by thermocompression bonding in two or more stages.
- thermocompression bonding is preferably performed in the range of -10 to +20°C, more preferably in the range of -8 to +15°C, more preferably in the range of -5 to +10°C, which is the melting point of the resin constituting the thermoplastic resin film. It is even more preferable to do so.
- thermocompression bonding is performed in two or more steps, it is preferable that each thermocompression bonding be performed within the above range.
- the pressure during thermocompression bonding may be the weight of the heater itself, or may be increased by adding a load.
- the pressure is preferably 0.01 to 10 MPa, more preferably 0.1 to 1 MPa.
- thermocompression bonding may be performed using a release film in order to enhance the release property between each heater and the thermoplastic resin film.
- Cooling may be performed using a cooling plate or by air cooling.
- inserting a cooling step improves the releasability between the thermoplastic resin film and the release film.
- At least one selected from the group consisting of the first heater and the second heater has a concave portion in the thermocompression bonding surface, and in the thermocompression bonding, the thermocompression bonding surface is the second thermoplastic resin in the first thermoplastic resin film. forming a first welded portion inside the end of the film, and forming a second welded portion inside the end of the second thermoplastic resin film on the first thermoplastic resin film side; It is also preferable that the portion between the first welded portion and the second welded portion is maintained without being welded.
- a comb-shaped heater may be used for at least one selected from the group consisting of the first heater and the second heater.
- the depth of the recess is not particularly limited, and is preferably 0.2 mm or more, and may be 0.3 mm or more, from the viewpoint of ensuring sufficient depth so as not to come into contact with the thermoplastic resin film to be welded.
- the upper limit of the depth of the recess is not particularly limited, and for example, the depth of the recess may be 100 mm or less.
- the width of the recess is preferably 2.0 mm or more, more preferably 2.5 mm or more, and even more preferably 2.8 mm or more, from the viewpoint of elongation of the connecting portion. From the viewpoint of handleability of the welding film, etc., the width of the recess is preferably 10.0 mm or less, more preferably 8.0 mm or less, and even more preferably 6.0 mm or less.
- FIG. 4 shows an example of a process for producing a welded film by the first thermocompression bonding and the second thermocompression bonding.
- FIG. 4 is a schematic cross-sectional view of the thermocompression bonding section of the thermocompression bonding machine. The arrow indicates the direction of transport of the film.
- the thermocompression bonding section includes, in order from the conveying direction of the thermoplastic resin film, a first heater 21 and a second heater 22 used in the first thermocompression bonding, a first heater 23 and a second heater 24 used in the second thermocompression bonding, and Cooling plates 25, 26 are provided.
- a first heater 21 and a second heater 22 used in the first thermocompression bonding
- a first heater 23 and a second heater 24 used in the second thermocompression bonding
- Cooling plates 25, 26 are provided.
- thermoplastic resin film is first thermocompression bonded by the first heater 21 and the second heater 22 in the first thermocompression bonding.
- the temperatures of the first heater 21 and the second heater 22 in the first thermocompression bonding are, for example, ⁇ 10 to +20° C. which is the melting point of the resin forming the first and second thermoplastic resin films.
- the thermoplastic resin film is transported and thermocompression-bonded by the first heater 23 and the second heater 24 in the second thermocompression bonding.
- the temperature of the first heater 23 and the second heater 24 in the second thermocompression bonding is, for example, ⁇ 10 to +20° C. which is the melting point of the resin constituting the first and second thermoplastic resin films.
- the temperatures of the first heater and the second heater may be the same or different. For example, if the thickness of the first thermoplastic resin film and the second thermoplastic resin film is different from the thickness of the connecting thermoplastic resin film, the temperature of the heater on the thicker film side is set higher. preferably. Subsequently, the thermoplastic resin film is conveyed and cooled by the cooling plates 25,26.
- the shape of the first heater 21 and the second heater 22 in the first thermocompression bonding can be, for example, the shape shown in (a) in FIGS. 5A to 5C.
- the thermoplastic resin film can be welded at the overlapping portion of the thermoplastic resin film.
- the shape of the first heater 23 and the second heater 24 in the second thermocompression bonding can be, for example, a comb shape shown in FIG. 5B(b) or FIG. 5C(b).
- a comb-shaped heater having a concave portion on the thermocompression-bonding surface By using a comb-shaped heater having a concave portion on the thermocompression-bonding surface, the first welded portion and the second welded portion are formed while the portion between them is not welded.
- FIG. 5A(b) shows a conventional example, and thermocompression bonding is performed including the boundary portion between the first thermoplastic resin film 1 and the second thermoplastic resin film 2 . In this case, the thickness of the film at the boundary portion becomes thin, making it easier to form a notch.
- the welded film of the present disclosure can be used for membrane structure films (eg, membrane structure outer covering films), agricultural films (eg, agricultural house covering films), and the like.
- Membrane structures are structures such as roofs, outer walls, and facilities that use films. Examples of facilities include sports facilities (swimming pools, gymnasiums, tennis courts, soccer fields, etc.), warehouses, assembly halls, exhibition halls, and gardening facilities (gardening greenhouses, agricultural greenhouses, etc.).
- Examples 1 and 2 are comparative examples, and Examples 3 and 4 are examples.
- Example 1 As the first thermoplastic resin film, the second thermoplastic resin film, and the connecting thermoplastic resin film, ETFE films (manufactured by AGC, melting point 260° C.) having thicknesses shown in Table 1 were used. The width of the first and second thermoplastic resin films was 1.3 m, and the width of the connecting thermoplastic resin film was 32 mm. A welding film for evaluation was produced at the temperature and transport speed shown in Table 1 using a hot plate continuous welding machine manufactured by Quinlight Denshi Seiko Co., Ltd. having the configuration shown in the schematic diagram of FIG. As the first heater and the second heater in the first thermocompression bonding, those shown in FIG.
- thermocompression bonding Comb heater (width 30 mm, recess width 8 mm, recess depth 5 mm)
- ⁇ Second heater in the first thermocompression bonding flat heater (width 30 mm)
- First heater in the second thermocompression bonding flat heater (width 30 mm)
- ⁇ Second heater in the second thermocompression bonding flat heater (width 30 mm)
- Example 2 A welding film for evaluation was produced in the same manner as in Example 1, except that the thickness of the connecting thermoplastic resin film, the temperature of each heater, and the conveying speed were set as shown in Table 1.
- Example 3 A welded film for evaluation was produced in the same manner as in Example 2, except that the first heater and the second heater in the second thermocompression bonding were changed.
- the first heater and the second heater in the first thermocompression bonding are shown in FIG. 5B(a), and the first heater and the second heater in the second thermocompression bonding are shown in FIG. 5B(b). Using. Details of each heater are shown below.
- thermocompression bonding Comb heater (width 30 mm, recess width 8 mm, recess depth 5 mm)
- second thermocompression bonding Comb heater (width 30 mm, recess width 8 mm, recess depth 5 mm)
- second thermocompression bonding Comb heater (width 30 mm, recess width 8 mm, recess depth 5 mm)
- Example 4 A welded film for evaluation was produced in the same manner as in Example 2, except that the first heater and the second heater in the second thermocompression bonding were changed.
- the first heater and the second heater in the first thermocompression bonding are shown in FIG. 5C(a), and the first heater and the second heater in the second thermocompression bonding are shown in FIG. 5C(b). Using. Details of each heater are shown below.
- thermocompression bonding Comb heater (width 30 mm, recess width 8 mm, recess depth 5 mm)
- second thermocompression bonding Comb heater (width 30 mm, recess width 3 mm, recess depth 1 mm)
- second thermocompression bonding Comb heater (width 30 mm, recess width 3 mm, recess depth 1 mm)
- the tensile elongation at break of the first thermoplastic resin film before welding was 409.7%.
- distance between welded parts represents the minimum distance between the first welded part and the second welded part.
- distance between the edge and the welded portion represents the minimum distance between the edge of the first thermoplastic resin film on the side of the second thermoplastic resin film and the first welded portion.
- the shape of the connecting portion is symmetrical with respect to the connecting portion.
- Example 1 the occurrence of the notch phenomenon was observed, and rupture occurred at about 150,000 times in the repeated load application test. In addition, the tensile elongation retention at the connecting portion also showed a low value.
- the connecting thermoplastic resin film is thicker than the first and second thermoplastic resin films, the setting temperature of the first heater on the connecting thermoplastic resin film side is set to the first and second thermoplastic resin films. The temperature is set higher than the set temperature of the second heater on the film side. It is presumed that the notch phenomenon occurred relatively easily because the temperature of the welding interface during welding was difficult to stabilize.
- Example 2 the occurrence of the notch phenomenon was observed, and rupture occurred at 280,000 times in the repeated load application test. In addition, the tensile elongation retention at the connecting portion also showed a low value.
- the thickness of the thermoplastic resin film for connection is the same as the thickness of the first and second thermoplastic resin films. It is presumed that the notch phenomenon occurred because the film thickness became thin at the boundary portion with the second thermoplastic resin film.
- Example 3 no breakage occurred even after 1 million times in the repeated load application test. In addition, the tensile breaking elongation retention rate of the connecting portion also showed a high value.
- both the first thermocompression bonding and the second thermocompression bonding are welded by a comb-shaped heater, so a notch in the gap between the first thermoplastic resin film and the second thermoplastic resin film It is presumed that the occurrence of the phenomenon was suppressed.
- Example 4 was particularly excellent with no curling of the non-welded portion.
- thermoplastic resin film 2 Second thermoplastic resin film 3 Connecting thermoplastic resin film 11 First welding part 12 Second welding part 21 First heater 22 in first thermocompression bonding Second heater 23 in first thermocompression bonding Second second First heater 24 in thermocompression bonding Second heater 25 in second thermocompression bonding Cooling plate 26 Cooling plate 27 Release film 100 Welding film
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Abstract
Description
<1> 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の溶着部位と前記第2の溶着部位との最小距離が2.0mm以上であることを特徴とする、溶着フィルム。
<2> 前記第1の熱可塑性樹脂フィルム又は前記第2の熱可塑性樹脂フィルムと、前記第1の溶着部位又は前記第2の溶着部位と、の位置関係が、下記(i)及び(ii)からなる群より選択される少なくとも一方を満たす、<1>に記載の溶着フィルム。
(i)前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部と、前記第1の溶着部位と、の最小距離が0.5mm以上
(ii)前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部と、前記第2の溶着部位と、の最小距離が0.5mm以上
<3> 前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す、
<1>又は<2>に記載の溶着フィルム。
<4> 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の熱可塑性樹脂フィルム又は前記第2の熱可塑性樹脂フィルムと、前記第1の溶着部位又は前記第2の溶着部位と、の位置関係が、下記(i)及び(ii)からなる群より選択される少なくとも一方を満たすことを特徴とする、溶着フィルム。
(i)前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部と、前記第1の溶着部位と、の最小距離が0.5mm以上
(ii)前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部と、前記第2の溶着部位と、の最小距離が0.5mm以上
<5> 前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す、
<4>に記載の溶着フィルム。
<6> 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す
ことを特徴とする、溶着フィルム。
<7> JIS K6732:2006に準じて、標線間距離40mmのダンベル型試験片を用いて、引張速度200mm/分の条件で測定される連結部の引張破断伸度が150%以上である、<1>~<6>のいずれか1項に記載の溶着フィルム。
<8> 前記第1の熱可塑性樹脂フィルム及び前記第2の熱可塑性樹脂フィルムの厚さに対する前記連結用熱可塑性樹脂フィルムの厚さの比が0.8~1.2である、<1>~<7>のいずれか1項に記載の溶着フィルム。
<9> 前記第1の熱可塑性樹脂フィルム、前記第2の熱可塑性樹脂フィルム、及び前記連結用熱可塑性樹脂フィルムが、それぞれ独立に、フッ素樹脂、ポリエステル樹脂、ポリオレフィン樹脂からなる群より選択される少なくとも1つを含む、<1>~<8>のいずれか1項に記載の溶着フィルム。
<10> 第1の熱可塑性樹脂フィルムと、第2の熱可塑性樹脂フィルムと、に連結用熱可塑性樹脂フィルムを架け渡してなる仮配置体を準備することと、
前記連結用熱可塑性樹脂フィルムの外側に配置される第1ヒータと、前記第1の熱可塑性樹脂フィルム及び前記第2の熱可塑性樹脂フィルムの外側に配置される第2ヒータと、により前記仮配置体を加熱圧着して、前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとが溶着される第1の溶着部位、及び前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとが溶着される第2の溶着部位を形成することと、
を含む溶着フィルムの製造方法であり、
前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方は、前記加熱圧着の工程にわたって前記第1の溶着部位と前記第2の溶着部位の間の部位と接しない構成とされていることを特徴とする、
溶着フィルムの製造方法。
<11> 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方は、加熱圧着面に凹部を有し、
前記加熱圧着において、前記加熱圧着面は、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部より内側で前記第1の溶着部位を形成し、かつ前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部より内側で前記第2の溶着部位を形成し、前記凹部により、前記第1の溶着部位と前記第2の溶着部位との前記間の部位が溶着されずに維持される、<10>に記載の溶着フィルムの製造方法。
<12> 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方における前記凹部の深さが0.2mm以上である、<11>に記載の溶着フィルムの製造方法。
<13> 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方における前記凹部の幅が2.0mm以上である、<11>又は<12>に記載の溶着フィルムの製造方法。
<14> 膜構造物用フィルム又は農業用フィルムである、<1>~<9>のいずれか1項に記載の溶着フィルム又は<10>~<13>のいずれか1項に記載の製造方法により製造される溶着フィルム。
本開示において「~」を用いて示された数値範囲には、「~」の前後に記載される数値がそれぞれ最小値及び最大値として含まれる。
本開示において各成分は該当する物質を複数種含んでいてもよい。組成物中に各成分に該当する物質が複数種存在する場合、各成分の含有率又は含有量は、特に断らない限り、組成物中に存在する当該複数種の物質の合計の含有率又は含有量を意味する。
本開示において実施形態を図面を参照して説明する場合、当該実施形態の構成は図面に示された構成に限定されない。また、図面における部材の大きさは概念的なものであり、部材間の大きさの相対的な関係はこれに限定されない。
本開示において、重合体の「単位」とは、重合体中に存在して重合体を構成する、単量体に由来する部分を意味する。また、ある単位の構造を重合体形成後に化学的に変換したものも単位という。なお、場合によっては、個々の単量体に由来する単位をその単量体名に「単位」を付した名称で呼ぶ。
本開示において、フィルム及びシートを、その厚さにかかわらず「フィルム」と称する。
本開示において、「溶着部位」とは、2以上の熱可塑性樹脂フィルムが熱により溶着された領域を表す。2以上の熱可塑性樹脂フィルムが接触しているが溶着されていない領域は溶着部位には含めない。溶着フィルムの溶着部位及び非溶着部位は、溶着フィルムを、連結用熱可塑性樹脂フィルムを内側にして90°折り曲げたときに、非溶着部位では第1又は第2の熱可塑性樹脂フィルムが連結用熱可塑性樹脂フィルムに追従して折り曲がらないことに基づき判断できる。
本開示において、「連結部」とは、溶着部位を含め、複数の熱可塑性樹脂フィルムを連結している付近の領域を表す。
本開示において、溶着フィルムの「連結部の断面図」とは、第1の熱可塑性樹脂フィルム及び第2の熱可塑性樹脂フィルムの配列方向に沿って溶着フィルムを切断したときの連結部の切断面を示す図を意味し、例えば図1~3、及び図5A~Cに示される断面図である。
本開示において、フィルム又はその部分の「幅」とは、第1の熱可塑性樹脂フィルム及び第2の熱可塑性樹脂フィルムの配列方向に沿う方向の長さを意味する。
本開示において、「融点」とは、示差走査熱量測定(DSC)法で測定した融解ピークの最大値に対応する温度を意味する。
本開示において、第1~3の実施形態に係るフィルムを包括して「本開示のフィルム」ということがある。
本開示の第1の実施形態に係る溶着フィルムは、第1の熱可塑性樹脂フィルムと、第2の熱可塑性樹脂フィルムと、前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、を少なくとも備え、前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、前記第1の溶着部位と前記第2の溶着部位との最小距離が2.0mm以上である。
複数のフィルムの連結部では一般的に伸度が低下するが、本実施形態に係る溶着フィルムでは、第1の溶着部位11と第2の溶着部位12との最小距離D1が2.0mm以上確保されていることから、第1の溶着部位11及び第2の溶着部位12との間のフィルム伸度が維持され、長期に展張されても溶着フィルム100が連結部で裂けにくいと考えられる。
(i)前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部と、前記第1の溶着部位と、の最小距離が0.5mm以上
(ii)前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部と、前記第2の溶着部位と、の最小距離が0.5mm以上
(i)前記第1の熱可塑性樹脂フィルム1における前記第2の熱可塑性樹脂フィルム2側の端部と、前記第1の溶着部位11と、の最小距離が0.5mm以上。
(ii)前記第2の熱可塑性樹脂フィルム2における前記第1の熱可塑性樹脂フィルム1側の端部と、前記第2の溶着部位12と、の最小距離が0.5mm以上。
第1の熱可塑性樹脂フィルム1及び第2の熱可塑性樹脂フィルム2からなる群より選択される少なくとも一方において、0.5mm以上のD2が確保されていることによって、それぞれ対応する第1の熱可塑性樹脂フィルム1の端部又は第2の熱可塑性樹脂フィルム2の端部において裂け目(以下、「ノッチ」とも記す。)が入りにくく、この結果、溶着フィルム100が裂けることが抑制できると考えられる。
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す。
溶着フィルム100が0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たすことで、第1の熱可塑性樹脂フィルム1の端部又は第2の熱可塑性樹脂フィルム2の端部において裂け目(すなわち、ノッチ)が入りにくくなり、この結果、溶着フィルム100が裂けることが抑制できると考えられる。
非晶性樹脂としては、ポリスチレン、ポリ塩化ビニル、ポリカーボネート、ポリメタクリル酸メチル等が挙げられる。
結晶性樹脂としては、フッ素樹脂、ポリエステル樹脂、ポリオレフィン樹脂等が挙げられる。
ポリオレフィン樹脂としては、ポリエチレン、エチレン-αオレフィン共重合体、エチレン-ビニルアセテート共重合体、エチレン-ビニルアルコール共重合体、ポリプロピレン、エチレン-プロピレン共重合体等が挙げられる。これらのポリオレフィン樹脂はそれぞれ、他の単位を更に有してもよい。
結晶性樹脂の中でも、耐候性、耐薬品性に優れる観点から、フッ素樹脂が好ましい。すなわち、熱可塑性樹脂フィルムがフッ素樹脂のフィルムであることが好ましい。
フッ素樹脂の中でも、耐候性と比重、価格の面に優れる観点から、ETFE、PFA、FEP、PCTFE、PVDF及びPVFからなる群より選択される少なくとも1種が好ましく、ETFE、PFA及びFEPからなる群より選択される少なくとも1種がより好ましく、ETFEが特に好ましい。
湿式法としては、親水性物質の溶液をローラーで塗布する方法、前記溶液をスプレー塗工する方法、前記溶液を刷毛で塗布する方法、前記溶液を塗工機で塗工する方法等が挙げられる。中でも、親水性物質の溶液を塗工機でコーティングする方法又はスプレーで塗工する方法が好ましい。
乾式法としては、親水性物質の、スパッタリング法、真空蒸着法、CVD法、イオンプレーティング法等が挙げられる。生産性が高く、親水性の持続性に優れる観点からは、親水性物質のスパッタリング法が好ましい。
前記親水性物質としては、SiO2、Al2O3等の無機質コロイドゾル、ポリビニルアルコール、アクリル酸等の親水性樹脂、Si、Sn、Ti、Nb、Al、Zn等の金属の酸化物等が挙げられる。
特に、Si、Sn、Ti等の金属の酸化物のスパッタリング法が好ましい。この場合には、Si及び/又はSnの金属の酸化物を用いることがより好ましい。
連結部の伸度の観点からは、前記最小距離は、2.5mm以上がより好ましく、2.8mm以上が更に好ましい。溶着フィルムの取り扱いに優れる等の観点からは、前記最小距離は、10.0mm以下が好ましく、8.0mm以下がより好ましく、6.0mm以下が更に好ましい。
(i)第1の熱可塑性樹脂フィルムにおける第2の熱可塑性樹脂フィルム側の端部と、第1の溶着部位と、の最小距離が0.5mm以上。
(ii)第2の熱可塑性樹脂フィルムにおける第1の熱可塑性樹脂フィルム側の端部と、第2の溶着部位と、の最小距離が0.5mm以上。
本開示の第2の実施形態に係る溶着フィルムは前記条件を満たす。
前記(i)及び(ii)における前記最小距離は、それぞれ独立に、0.7mm以上でもよく、0.9mm以上でもよい。連結部における第1及び第2の熱可塑性樹脂フィルムの端部の非溶着部位が作業性に影響を与えにくい観点からは、前記(i)及び(ii)における前記最小距離は、10.0mm以下が好ましく、5.0mm以下が好ましく、3.0mm以下が更に好ましい。
L1bは、第1の溶着部位の幅を表し、
L1aは、第1の溶着部位の幅L1bに、第1の熱可塑性樹脂フィルムにおける第2の熱可塑性樹脂フィルム側の端部から第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、第2の溶着部位の幅を表し、
L2aは、第2の溶着部位の幅L2bに、第2の熱可塑性樹脂フィルムの第1の熱可塑性樹脂側の端部から第2の溶着部位までの最小距離を加えた総長さを表す。
本開示の第3の実施形態において、溶着フィルムは、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たす。
溶着部位の強度の観点からは、(L1b/L1a)及び(L2b/L2a)は、それぞれ独立に、0.33以上が好ましく、0.50以上がより好ましく、0.80以上が更に好ましい。(L1b/L1a)は、0.99未満が好ましく、0.95以下がより好ましい。以上の観点から、(L1b/L1a)及び(L2b/L2a)は、それぞれ独立に、0.33以上0.99未満が好ましく、0.50~0.95がより好ましく、0.80~0.95が更に好ましい。
(引張破断伸度)
本開示の溶着フィルムは、連結部の裂けを良好に抑制できる観点から、JIS K6732:2006に準じて、標線間距離40mmのダンベル型試験片を用いて、引張速度200mm/分の条件で測定される連結部の引張破断伸度が150%以上であることが好ましい。連結部の引張破断伸度は、具体的には実施例の方法により測定できる。連結部の引張破断伸度は、180%以上がより好ましく、250%以上が更に好ましく、280%以上が特に好ましい。連結部の引張破断伸度の上限値は特に制限されず、溶着フィルムの強度の観点からは、連結部の引張破断伸度は500%以下が好ましく、350%以下がより好ましく、280%以下が更に好ましい。
溶着フィルムの連結部の引張強度は、膜構造用途等の高い強度を要する用途に適用し得る観点からは、25MPa以上が好ましく、30MPa以上がより好ましく、35MPa以上が更に好ましい。連結部の引張強度の上限は特に限定されず、高いほど好ましい。
「引張強度」とは、JIS K6732:2006に準じ、標線間距離40mmのダンベル型試験片を用いて、引張速度200mm/分の条件で測定される引張破壊応力である。
溶着フィルムの製造方法は特に制限されず、例えば、第1の溶着部位及び第2の溶着部位は加熱圧着されるが、第1の溶着部位と第2の溶着部位とに挟まれる部分は加熱圧着されない方法が採られてもよい。
本開示の溶着フィルムの用途は特に制限されない。例えば、本開示の溶着フィルムは、膜構造物用フィルム(例えば膜構造物用外部被覆フィルム)、農業用フィルム(例えば農業用ハウス被覆フィルム)等に用いることができる。
膜構造物は、フィルムを用いた屋根、外壁、施設等の構造物である。施設の例としては、スポーツ施設(プール、体育館、テニスコート、サッカー場等)、倉庫、集会場、展示場、園芸施設(園芸ハウス、農業用ハウス等)が挙げられる。
第1の熱可塑性樹脂フィルム、第2の熱可塑性樹脂フィルム、及び連結用熱可塑性樹脂フィルムとして、表1に示される厚さを有するETFEフィルム(AGC社製、融点260℃)を用いた。第1及び第2の熱可塑性樹脂フィルムの幅は1.3m、連結用熱可塑性樹脂フィルムの幅は32mmとした。
図4の概略図で示される構成を有するクインライト電子精工社製の熱板式連続溶着機を用いて、表1に示される温度及び搬送速度で、評価用の溶着フィルムを作製した。第1の加熱圧着における第1ヒータ及び第2ヒータとして図5A(a)に示されるものを用い、第2の加熱圧着における第1ヒータ及び第2ヒータとして図5A(b)に示されるものを用いた。各ヒータの詳細を以下に示す。
・第1の加熱圧着における第1ヒータ:くし形ヒータ(幅30mm,凹部の幅8mm,凹部の深さ5mm)
・第1の加熱圧着における第2ヒータ:平面形ヒータ(幅30mm)
・第2の加熱圧着における第1ヒータ:平面形ヒータ(幅30mm)
・第2の加熱圧着における第2ヒータ:平面形ヒータ(幅30mm)
連結用熱可塑性樹脂フィルムの厚さ、各ヒータの温度及び搬送速度を表1に示される内容にした以外は例1と同様にして評価用の溶着フィルムを作製した。
第2の加熱圧着における第1ヒータ及び第2ヒータを変更した以外は例2と同様にして評価用の溶着フィルムを作製した。
第1の加熱圧着における第1ヒータ及び第2ヒータとして図5B(a)に示されるものを用い、第2の加熱圧着における第1ヒータ及び第2ヒータとして図5B(b)に示されるものを用いた。各ヒータの詳細を以下に示す。
・第1の加熱圧着における第1ヒータ:くし形ヒータ(幅30mm、凹部の幅8mm、凹部の深さ5mm)
・第1の加熱圧着における第2ヒータ:平面形ヒータ(幅30mm)
・第2の加熱圧着における第1ヒータ:くし形ヒータ(幅30mm、凹部の幅8mm、凹部の深さ5mm)
・第2の加熱圧着における第2ヒータ:くし形ヒータ(幅30mm、凹部の幅8mm、凹部の深さ5mm)
第2の加熱圧着における第1ヒータ及び第2ヒータを変更した以外は例2と同様にして評価用の溶着フィルムを作製した。
第1の加熱圧着における第1ヒータ及び第2ヒータとして図5C(a)に示されるものを用い、第2の加熱圧着における第1ヒータ及び第2ヒータとして図5C(b)に示されるものを用いた。各ヒータの詳細を以下に示す。
・第1の加熱圧着における第1ヒータ:くし形ヒータ(幅30mm、凹部の幅8mm、凹部の深さ5mm)
・第1の加熱圧着における第2ヒータ:平面形ヒータ(幅30mm)
・第2の加熱圧着における第1ヒータ:くし形ヒータ(幅30mm、凹部の幅3mm、凹部の深さ1mm)
・第2の加熱圧着における第2ヒータ:くし形ヒータ(幅30mm、凹部の幅3mm、凹部の深さ1mm)
各例で得られた溶着フィルムから、図6に示されるように、溶着部位が中央になるように、標線間距離(図6における両矢印間の距離)40mmのダンベル型(タイプ1)の試験片を切り出した。オリエンテック製の万能引張試験機を使用し、JIS K6732:2006に準じ、引張速度200mm/分にて溶着フィルムの連結部の引張破断伸度を測定した。
得られた引張破断伸度を用いて、下式より引張破断伸度保持率を算出した。
各例で得られた溶着フィルムについて、第1及び第2の熱可塑性樹脂フィルムが非溶着部位で容易にめくれないものをA、容易にめくれてしまうものをBとした。
各例で作製した溶着フィルムから、連結部が中心となるように、長さ300mm、幅50mmの長方形の試験片を切り出した。第1の溶着部位及び第2の溶着部位の両側端部にそれぞれ2mmの切込みを入れ、耐風疲労試験装置(AGC社製)を用いて、溶着フィルムに5回/秒で繰り返し引張荷重をかけ、溶着フィルムの破断に至るまでの回数を観察した。引張荷重は、溶着フィルムが約3%の伸びを生じる荷重とした(評価部分の溶着フィルム長:荷重付加前 223mm、荷重付加後 230mm)。
以下の指標で評価を行った。
A:破断までの回数が100万回以上
B:破断までの回数が50万回以上100万回未満
C:破断までの回数が50万回未満
本明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に援用されて取り込まれる。
2 第2の熱可塑性樹脂フィルム
3 連結用熱可塑性樹脂フィルム
11 第1の溶着部位
12 第2の溶着部位
21 第1の加熱圧着における第1ヒータ
22 第1の加熱圧着における第2ヒータ
23 第2の加熱圧着における第1ヒータ
24 第2の加熱圧着における第2ヒータ
25 冷却板
26 冷却板
27 離型フィルム
100 溶着フィルム
Claims (14)
- 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の溶着部位と前記第2の溶着部位との最小距離が2.0mm以上であることを特徴とする、溶着フィルム。 - 前記第1の熱可塑性樹脂フィルム又は前記第2の熱可塑性樹脂フィルムと、前記第1の溶着部位又は前記第2の溶着部位と、の位置関係が、下記(i)及び(ii)からなる群より選択される少なくとも一方を満たす、請求項1に記載の溶着フィルム。
(i)前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部と、前記第1の溶着部位と、の最小距離が0.5mm以上
(ii)前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部と、前記第2の溶着部位と、の最小距離が0.5mm以上 - 前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す、
請求項1又は2に記載の溶着フィルム。 - 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の熱可塑性樹脂フィルム又は前記第2の熱可塑性樹脂フィルムと、前記第1の溶着部位又は前記第2の溶着部位と、の位置関係が、下記(i)及び(ii)からなる群より選択される少なくとも一方を満たすことを特徴とする、溶着フィルム。
(i)前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部と、前記第1の溶着部位と、の最小距離が0.5mm以上
(ii)前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部と、前記第2の溶着部位と、の最小距離が0.5mm以上 - 前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す、
請求項4に記載の溶着フィルム。 - 第1の熱可塑性樹脂フィルムと、
第2の熱可塑性樹脂フィルムと、
前記第1の熱可塑性樹脂フィルムと前記第2の熱可塑性樹脂フィルムとに架け渡して配置される連結用熱可塑性樹脂フィルムと、
を少なくとも備える溶着フィルムであり、
前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第1の溶着部位により溶着され、前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとは第2の溶着部位により溶着され、
前記第1の溶着部位及び前記第2の溶着部位の位置関係が、0<(L1b/L1a)<0.99、及び0<(L2b/L2a)<0.99からなる群より選択される少なくとも一方を満たし、式中、
L1bは、前記第1の溶着部位の幅を表し、
L1aは、前記第1の溶着部位の幅L1bに、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部から前記第1の溶着部位までの最小距離を加えた総長さを表し、
L2bは、前記第2の溶着部位の幅を表し、
L2aは、前記第2の溶着部位の幅L2bに、前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部から前記第2の溶着部位までの最小距離を加えた総長さを表す
ことを特徴とする、溶着フィルム。 - JIS K6732:2006に準じて、標線間距離40mmのダンベル型試験片を用いて、引張速度200mm/分の条件で測定される連結部の引張破断伸度が150%以上である、請求項1~6のいずれか1項に記載の溶着フィルム。
- 前記第1の熱可塑性樹脂フィルム及び前記第2の熱可塑性樹脂フィルムの厚さに対する前記連結用熱可塑性樹脂フィルムの厚さの比が0.8~1.2である、請求項1~7のいずれか1項に記載の溶着フィルム。
- 前記第1の熱可塑性樹脂フィルム、前記第2の熱可塑性樹脂フィルム、及び前記連結用熱可塑性樹脂フィルムが、それぞれ独立に、フッ素樹脂、ポリエステル樹脂、ポリオレフィン樹脂からなる群より選択される少なくとも1つを含む、請求項1~8のいずれか1項に記載の溶着フィルム。
- 第1の熱可塑性樹脂フィルムと、第2の熱可塑性樹脂フィルムと、に連結用熱可塑性樹脂フィルムを架け渡してなる仮配置体を準備することと、
前記連結用熱可塑性樹脂フィルムの外側に配置される第1ヒータと、前記第1の熱可塑性樹脂フィルム及び前記第2の熱可塑性樹脂フィルムの外側に配置される第2ヒータと、により前記仮配置体を加熱圧着して、前記第1の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとが溶着される第1の溶着部位、及び前記第2の熱可塑性樹脂フィルムと前記連結用熱可塑性樹脂フィルムとが溶着される第2の溶着部位を形成することと、
を含む溶着フィルムの製造方法であり、
前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方は、前記加熱圧着の工程にわたって前記第1の溶着部位と前記第2の溶着部位の間の部位と接しない構成とされていることを特徴とする、
溶着フィルムの製造方法。 - 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方は、加熱圧着面に凹部を有し、
前記加熱圧着において、前記加熱圧着面は、前記第1の熱可塑性樹脂フィルムにおける前記第2の熱可塑性樹脂フィルム側の端部より内側で前記第1の溶着部位を形成し、かつ前記第2の熱可塑性樹脂フィルムにおける前記第1の熱可塑性樹脂フィルム側の端部より内側で前記第2の溶着部位を形成し、前記凹部により、前記第1の溶着部位と前記第2の溶着部位との前記間の部位が溶着されずに維持される、請求項10に記載の溶着フィルムの製造方法。 - 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方における前記凹部の深さが0.2mm以上である、請求項11に記載の溶着フィルムの製造方法。
- 前記第1ヒータ及び前記第2ヒータからなる群より選択される少なくとも一方における前記凹部の幅が2.0mm以上である、請求項11又は12に記載の溶着フィルムの製造方法。
- 膜構造物用フィルム又は農業用フィルムである、請求項1~9のいずれか1項に記載の溶着フィルム又は請求項10~13のいずれか1項に記載の製造方法により製造される溶着フィルム。
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JPS5317673A (en) * | 1976-08-02 | 1978-02-17 | Nippon Carbide Kogyo Kk | Method of adhesion of thermally shrinkable conjugate film or sheet |
JPS58160118U (ja) * | 1982-04-19 | 1983-10-25 | 鐘淵化学工業株式会社 | 加熱圧着接合装置 |
JPH09207221A (ja) * | 1996-02-07 | 1997-08-12 | Yokohama Rubber Co Ltd:The | 防水シートの接合方法 |
JP2003313311A (ja) * | 2001-12-14 | 2003-11-06 | Asahi Glass Co Ltd | フィルムの接合方法、その方法により得られた広幅フィルム及びそれを用いてなる農業用被覆資材 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS5317673A (en) * | 1976-08-02 | 1978-02-17 | Nippon Carbide Kogyo Kk | Method of adhesion of thermally shrinkable conjugate film or sheet |
JPS58160118U (ja) * | 1982-04-19 | 1983-10-25 | 鐘淵化学工業株式会社 | 加熱圧着接合装置 |
JPH09207221A (ja) * | 1996-02-07 | 1997-08-12 | Yokohama Rubber Co Ltd:The | 防水シートの接合方法 |
JP2003313311A (ja) * | 2001-12-14 | 2003-11-06 | Asahi Glass Co Ltd | フィルムの接合方法、その方法により得られた広幅フィルム及びそれを用いてなる農業用被覆資材 |
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