EP1908363A1 - Luft- und wasserdichter Reissverschluss - Google Patents

Luft- und wasserdichter Reissverschluss Download PDF

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Publication number
EP1908363A1
EP1908363A1 EP06020820A EP06020820A EP1908363A1 EP 1908363 A1 EP1908363 A1 EP 1908363A1 EP 06020820 A EP06020820 A EP 06020820A EP 06020820 A EP06020820 A EP 06020820A EP 1908363 A1 EP1908363 A1 EP 1908363A1
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EP
European Patent Office
Prior art keywords
fluid
slide fastener
tpe
tapes
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06020820A
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English (en)
French (fr)
Inventor
Livio Cossutti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riri Group SA
Original Assignee
Riri Group SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Riri Group SA filed Critical Riri Group SA
Priority to EP06020820A priority Critical patent/EP1908363A1/de
Publication of EP1908363A1 publication Critical patent/EP1908363A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/32—Means for making slide fasteners gas or watertight

Definitions

  • the present invention in its most general aspect, refers to a slide fastener.
  • the invention refers to a fluid-tight slide fastener, i.e. a slide fastener that is impermeable to fluids.
  • fluid-tight refers to a seal or material that is resistant to the passage of liquids, in particular water, and/or gases, for example air, even when put under a considerable pressure strain, for example a pressure difference between the interior and the exterior sides of a slide fastener of up to about 2 bar.
  • the present invention refers to a fluid-tight slide fastener of the type comprising a pair of impermeable tapes, each tape having a layered structure comprising an inner layer of a reinforcing textile material strip and an outer layer of fluid barrier material enveloping said inner layer, each tape also comprising a row of aligned teeth on at least a portion of one of the long edges thereof, said rows of aligned teeth facing each other and being associated to top and bottom stops, and a slider slidable between said top and bottom stops for engaging in a fluid-tight way or disengaging said aligned teeth respectively.
  • the present invention also refers to a process for manufacturing a fluid-tight slide fastener as above.
  • slide fasteners comprise a pair of tapes of a textile material, each tape bearing a row of aligned teeth on at least a portion of one of the long edges thereof, said rows of aligned teeth facing each other and being associated to top and bottom stops, and a slider slidable between said top and bottom stops for engaging or disengaging said aligned teeth respectively.
  • slide fasteners are required to be fluid-tight, to prevent the passage of fluids, in particular water, across the two sides of the tapes of the slide fasteners, yet both tenacious and pliable, to a certain extent.
  • multi-layered tapes composed of an inner layer of a reinforcing textile material enveloped in an outer fluid barrier material layer in such a way that none of the inner textile material is exposed to the surface, and to seal the aligned teeth on the outer fluid barrier material of the respective tapes so that the bonding which is formed between the teeth and the fluid barrier material is effectively fluid-tight.
  • thermoplastic elastomer material for the outer fluid-barrier layer of the tapes
  • thermoplastic material for the teeth are used for the manufacture of said fluid-tight slide fasteners.
  • these materials have proven to better meet most of the requirements that these products must satisfy, such as the above-mentioned impermeability and flexibility of the tapes, as well as their stability to light, resistance to sea water, and also easiness of sealing, gluing and stitching.
  • such materials can be efficiently worked in extrusion processes by which the layered structure of the tapes is formed and in injection overmolding processes by which the teeth are sealed to the tapes.
  • slide fasteners of the above-described type exhibit a drawback in that they do not always show satisfactory mechanical properties, in particular at the interface between the inner layer and the outer layer of the tapes.
  • delamination This separation process, known as delamination, which is mainly due to a non-satisfactory adhesion between the materials constituting the inner and the outer layers of the tapes, causes the tapes to weaken and the inner textile material to become exposed to the surface, thus compromising the fluid-tight nature of the tape itself.
  • the technical problem underlying the present invention is that of devising and providing a fluid-tight slide fastener of the type considered above, which is reliable in the long run with regard to its fluid-tight nature as well as its structural integrity, so as to overcome the mentioned drawbacks with reference to the prior art.
  • a fluid-tight slide fastener comprising a pair of tapes, each tape having a layered structure comprising an inner reinforcing textile material layer enveloped in a fluid barrier layer made of a thermoplastic elastomer material (TPE), each tape exhibiting a row of aligned teeth made of a thermoplastic material on at least a portion of one of the long sides thereof, the rows of aligned teeth of said pair of tapes facing each other and being associated to top and bottom stops, and a slider slidable between said top and bottom stops for engaging in a fluid-tight way or disengaging said aligned teeth respectively, characterized in that it further comprises an adhesive between the inner textile material layer and the outer fluid-barrier material layer of the tapes.
  • TPE thermoplastic elastomer material
  • said adhesive is applied on at least one of the surfaces of the inner textile material layer, more preferably on both the opposite surfaces of said inner textile material layer.
  • said textile material for inner reinforcing layer of the tapes is chosen between polyester (PE), preferably polyethylene terephtalate (PET), polyamide (PA) and their blends or copolymers.
  • PET polyethylene terephtalate
  • PA polyamide
  • thermoplastic elastomer material indicates specific materials, known per se, having a hard phase and a soft phase which confer thermoplastic properties and elastomer properties (flexibility) respectively. It includes block copolymers as well as blends or alloys comprising a thermoplastic material and an elastomer material.
  • Suitable TPEs to be used for the fluid barrier material layer may be selected form the group comprising: thermoplastic elastomer styrene copolymers (TPE-S), such as styrene/butadiene, styrene/butadiene/styzene, styrene/eten butene/styrene, styrene/isoprene blocks, styrene/butadiene/styrene/propyler.e, styrene/butylene/styrene/propylene, styrene/ethylene-butylene/styrene/polyphenylenether, styrene/ethylene-butylene/styrene/polipropylene; thermoplastic elastomer polyolefins (TPE-O, TPE-V), such as ethylene/vinyl acetate, ethylene/vinylacetate/polyvin
  • thermoplastic elastomer material for the fluid barrier material layer is chosen between a thermoplastic elastomer polyurethane (TPE-U) and thermoplastic elastomer polyester (TPE-E).
  • TPE-U thermoplastic elastomer polyurethane
  • TPE-E thermoplastic elastomer polyester
  • said TPE-E is a polyether-ester block copolymer and said TPE-U is a block copolymer obtained from an ether and/or an ester and a isocyanate (polyetherester urethane).
  • Suitable thermoplastic materials for the teeth may be selected from the group comprising polypropylene, polycarbonate (PC), polyethylene terephtalate (PET), polybutylene terephtalate (PBT), polyvinyl chloride (PVC), polyamide (PA), polystyrene (PS), preferably high density polystyrene (HDPS), poly(acrylonitrile-butadiene-styrene) (ABS) and their blends or copolymers.
  • PC polypropylene
  • PC polycarbonate
  • PET polyethylene terephtalate
  • PBT polybutylene terephtalate
  • PVC polyvinyl chloride
  • PA polyamide
  • PS polystyrene
  • HDPS high density polystyrene
  • ABS poly(acrylonitrile-butadiene-styrene)
  • thermoplastic material for the teeth is chosen among polybutylene terephthalate (PBT), poly(acrylonitrile butadiene styrene) (ABS), polyamide (PA) and their blends or copolymers.
  • PBT polybutylene terephthalate
  • ABS poly(acrylonitrile butadiene styrene)
  • PA polyamide
  • said thermoplastic material consists of a blend including PBT and polycarbonate (PC).
  • the PBT/PC weight ratio in said blend ranges between 70/30 and 30/70.
  • said thermoplastic material consists of a blend including poly(acrylonitrile butadiene styrene) (ABS) and a polyamide (PA) .
  • the ABS/PA weight ratio in said blend ranges between 70/30 and 30/70.
  • the materials constituting the fluid barrier layer of the tapes and the teeth may include suitable additives such as, for instance fillers, pigments, binders and/or compatibilizers, the latter being incorporated to improve the physical and chemical affinity between said materials and/or between the materials used for the layered structure of the tape.
  • suitable additives such as, for instance fillers, pigments, binders and/or compatibilizers, the latter being incorporated to improve the physical and chemical affinity between said materials and/or between the materials used for the layered structure of the tape.
  • the adhesive is constituted by any material that can efficiently adhere to both the materials of the inner textile layer and the outer fluid-barrier layer of the tapes.
  • the adhesive material comprises a polyurethane resin.
  • slide fasteners manufactured according to the invention by interposing an adhesive between the inner textile layer and the outer fluid-barrier layer have good mechanical properties at the interface between the layers of the tapes which are surprisingly well superior to those of prior art slide fasteners manufactured by direct bonding of said layers (i.e. without interposition of adhesives)
  • the layers are capable of reaching optimal values of adhesion to each other, through the intermediate adhesive, that are sufficient for withstanding the normal transfer of traction and shear forces through the contact interface which the slide fasteners are subjected to during their repeated use.
  • the thermoplastic elastomer material constituting the outer layer of the tapes confers a good flexibility to the tapes and exhibits a good adhesion by chemical bonding with the thermoplastic material constituting the teeth.
  • the present invention further relates to a process for manufacturing slide fasteners as described above. This process comprises the steps of:
  • said adhesive is applied on at least one of the opposite strips surfaces, more preferably on both the opposed strips surfaces.
  • the application of the adhesive is performed by soaking each textile material strip in a dispersion of the selected adhesive in an organic solvent or by spraying said adhesive dispersion onto at least one of the opposite surfaces of each textile material strip.
  • the covering step of the textile material strips with a fluid-barrier material layer is performed by extrusion.
  • said teeth are obtained by injection overmolding of the selected thermoplastic material onto said longitudinal edge of each covered strip.
  • the process of the invention further comprises the step of sealing each tape at its short cut edge(s) with said fluid-barrier material. This may be carried out for instance while heat cutting said coated strips or by covering said short cut edge(s) with "fresh" fluid-barrier material.
  • a fluid-tight slide fastener is shown, in accordance with the present invention and globally indicated with 10.
  • the slide fastener 10 comprises a pair of tapes 12, substantially parallel to each other, each tape 12 being equipped with a row 20 of aligned teeth 21 on a central portion of the inner long edge 13a thereof, in a conventional manner, for example through injection overmolding processes.
  • said rows 20 of aligned teeth 21 face each other and are associated to two stops, namely a bottom stop 24 and a top stop 26, positioned at a set distance from each other along said row of aligned teeth.
  • a slider 22 is slidable between the bottom stop 24 and the top stop 26, for engaging in a fluid-tight way or disengaging the aligned teeth 21 of said rows 20, respectively.
  • the slider 22 comes to the end of its opening stroke at the bottom stop 24, thereby disengaging the aligned teeth 21 of said rows 20 whereas the slider 22 comes to an end of its closing stroke at the top stop 26 thereby engaging in a fluid-tight way the opposite aligned teeth 21 of said opposite sets 20.
  • the bottom stop 24 is in form of a single piece applied on both the tapes 12 at the lower ends of the rows 20 of aligned teeth 21, whereas the top stop 26 comprises two half-portions, each half-portion being applied on a respective tape 12 at the upper end of the respective set 20 of aligned teeth 21.
  • top stop 24 and the bottom stop 26 to the tapes 12 can be carried out in a per se conventional manner for example through injection molding.
  • the tapes 12 are joined in a fluid-tight way along a portion 25 of the respective inner long edges from the rows 20 of aligned teeth 21 and comprising the bottom stop 24.
  • the portion 25 extends from the lower ends of said rows 20 of aligned teeth 21 up to the lower short edges 13b of the tapes.
  • each tape 12 comprises an inner reinforcing textile material layer 14 enveloped in an outer fluid barrier material layer 16 which entirely covers the inner textile material layer 14 so that no part of the inner textile material 14 remains exposed.
  • the tape 12 also includes two layers of an adhesive (layers 30 and 31) applied on the opposite (top and bottom) surfaces of the textile material layer 14. In the areas where the adhesive is present, the textile material layer 14 and the fluid-barrier material layer 16 are then joined indirectly by a strong chemical bonding between the adhesive molecules and the materials constituting the textile layer 14 and the fluid-barrier layer 16, which allows to avoid delamination of said layers 14 and 16.
  • Strips of PE fibers were soaked in a dispersion of polyurethane resin and then two layers of a fluid-barrier material (TPE-U) were extruded onto the respective surface of each strip recovered from said dispersion, so as to fully cover it with the fluid-barrier material.
  • TPE-U fluid-barrier material
  • the coated strips were then equipped each with a plurality of rows of aligned teeth along a longitudinal edge thereof, said rows being set at a predetermined distance to each other.
  • the teeth were each made from a blend of ABS and PA.
  • the teeth application was performed by injection overmolding the teeth onto said longitudinal edge of the coated strips in a conventional way (according to the procedure suggested by the manufacturer).
  • the coated strip equipped with said rows of aligned teeth were then heat cut transversally along consecutive rows of aligned teeth to obtain a plurality of tapes of the same dimensions, wherein each tape was equipped with a set of aligned teeth.
  • a plurality of slide fasteners according to invention was then obtained each from a pair of such tapes through a succession of further conventional steps among which the steps of equipping each pair of tapes with top and bottom stops and a slider running between said stops.
  • the slide fasteners so obtained were assayed for their resistance to delamination of the layered structure of the tapes before and after each of repeated washing cycles (up to five washing cycles).
  • Each washing cycle of the slide fasteners was carried out in a conventional washing machine at a temperature of 40°C for about 1 hour and 30 minutes using appropriate detergents.
  • the slide fasteners according to the invention are able to retain their fluid-tight characteristics in the long run upon repeated exposure to tensile stresses deriving for instance from their frequent and repeated use and upon conventional washing operations.
  • teeth their mechanical properties have been found to be fully comparable to those of the prior art slide fastener teeth, thereby proving that the present invention also achieves a good chemical bonding between the teeth material and the outer fluid-barrier material of the tapes.
  • a plurality of slide fasteners according to the invention were manufactured by the same procedure disclosed in example 1 except that TPE-E including yellow pigments was used as fluid-barrier material covering the textile material strips and PBT was used as a material for the teeth.
  • the slide fasteners so obtained were assayed for their resistance to delamination of the layered structure of the tapes.
  • the fluid-tight slide fastener according to the present invention solves the technical problem, mostly by the fact that it exhibits good fluid-tight characteristics even in the long run, as the tapes are resistant to delamination.
  • the slide fastener of the invention features many advantageous characteristics, including:, good flexibility, low brittle temperature (about -40 °C), performance stability in air in the temperature range of-30 to +70 °C, ease of coloring, water resistance (low hygroscopicity), resistance to sea water, and chemicals such as petrol or ammonia, visible and UV light stability, and ease of sealing, gluing and stitching.

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  • Slide Fasteners (AREA)
EP06020820A 2006-10-04 2006-10-04 Luft- und wasserdichter Reissverschluss Withdrawn EP1908363A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06020820A EP1908363A1 (de) 2006-10-04 2006-10-04 Luft- und wasserdichter Reissverschluss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06020820A EP1908363A1 (de) 2006-10-04 2006-10-04 Luft- und wasserdichter Reissverschluss

Publications (1)

Publication Number Publication Date
EP1908363A1 true EP1908363A1 (de) 2008-04-09

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EP06020820A Withdrawn EP1908363A1 (de) 2006-10-04 2006-10-04 Luft- und wasserdichter Reissverschluss

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EP (1) EP1908363A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012120602A1 (ja) * 2011-03-04 2012-09-13 Ykk株式会社 スライドファスナー及びその製造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111788A2 (de) * 1982-12-14 1984-06-27 Yoshida Kogyo K.K. Wasserdichter Reissverschluss und Verfahren zur Herstellung
EP0162350A2 (de) * 1984-05-19 1985-11-27 Yoshida Kogyo K.K. Verfahren zum Herstellen eines luftdichten und wasserdichten Reissverschlusses
US4601085A (en) * 1982-12-15 1986-07-22 Yoshida Kogyo K. K. Water-resistant slide fastener stringer
WO2002003825A1 (en) * 2000-07-11 2002-01-17 Riri S.A. Sealing slide fastener with teeth welded onto the tapes which they join
WO2002058500A1 (en) * 2001-01-27 2002-08-01 Ardmel Automation Limited Slide fastener
US20040237266A1 (en) * 2003-05-27 2004-12-02 Shin-Jen Wang Method for manufacturing waterproof zipper and the device manufactured from the same
US20060101632A1 (en) * 2004-11-12 2006-05-18 Shih Sheng Yang Method for infiltrating water-proof material into zipper

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111788A2 (de) * 1982-12-14 1984-06-27 Yoshida Kogyo K.K. Wasserdichter Reissverschluss und Verfahren zur Herstellung
US4601085A (en) * 1982-12-15 1986-07-22 Yoshida Kogyo K. K. Water-resistant slide fastener stringer
EP0162350A2 (de) * 1984-05-19 1985-11-27 Yoshida Kogyo K.K. Verfahren zum Herstellen eines luftdichten und wasserdichten Reissverschlusses
WO2002003825A1 (en) * 2000-07-11 2002-01-17 Riri S.A. Sealing slide fastener with teeth welded onto the tapes which they join
WO2002058500A1 (en) * 2001-01-27 2002-08-01 Ardmel Automation Limited Slide fastener
US20040237266A1 (en) * 2003-05-27 2004-12-02 Shin-Jen Wang Method for manufacturing waterproof zipper and the device manufactured from the same
US20060101632A1 (en) * 2004-11-12 2006-05-18 Shih Sheng Yang Method for infiltrating water-proof material into zipper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012120602A1 (ja) * 2011-03-04 2012-09-13 Ykk株式会社 スライドファスナー及びその製造方法
CN103501651A (zh) * 2011-03-04 2014-01-08 Ykk株式会社 拉链及其制造方法
CN103501651B (zh) * 2011-03-04 2016-01-06 Ykk株式会社 拉链及其制造方法
US9237781B2 (en) 2011-03-04 2016-01-19 Ykk Corporation Slider fastener and method for manufacturing same

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