EP1269876A2 - Hydrolysebeständiges Harz für Verschlussvorrichtung - Google Patents

Hydrolysebeständiges Harz für Verschlussvorrichtung Download PDF

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Publication number
EP1269876A2
EP1269876A2 EP02254526A EP02254526A EP1269876A2 EP 1269876 A2 EP1269876 A2 EP 1269876A2 EP 02254526 A EP02254526 A EP 02254526A EP 02254526 A EP02254526 A EP 02254526A EP 1269876 A2 EP1269876 A2 EP 1269876A2
Authority
EP
European Patent Office
Prior art keywords
synthetic resin
hydrolysis
fastener
slide fastener
resistant synthetic
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.)
Granted
Application number
EP02254526A
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English (en)
French (fr)
Other versions
EP1269876A3 (de
EP1269876B1 (de
Inventor
Isamu Kumano
Mutsuo Hirota
Toshiaki Inamura
Hiromi Aoshima
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YKK Corp
Original Assignee
YKK Corp
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Filing date
Publication date
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Publication of EP1269876A2 publication Critical patent/EP1269876A2/de
Publication of EP1269876A3 publication Critical patent/EP1269876A3/de
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Publication of EP1269876B1 publication Critical patent/EP1269876B1/de
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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
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B17/00—Press-button or snap fasteners
    • A44B17/0029—Press-button fasteners made of plastics
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0069—Details
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2561—Slider having specific configuration, construction, adaptation, or material
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/27—Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
    • Y10T24/2792—Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener] having mounting surface and filaments constructed from common piece of material

Definitions

  • This invention relates to a fastener product made of a synthetic resin, which product is excellent in resistance to moist heat and resistance to hydrolysis. More particularly, the present invention relates to recyclable fastener products of synthetic resin such as slide fasteners of synthetic resin, separable fasteners or surface fasteners of synthetic resin and snap tapes (tapes with snap buttons) of synthetic resin, which products are excellent in durability against wet heat and capable of maintaining the stable state of engagement without producing deterioration of strength even when repeatedly left under a high-temperature and high-humidity atmosphere.
  • synthetic resin such as slide fasteners of synthetic resin, separable fasteners or surface fasteners of synthetic resin and snap tapes (tapes with snap buttons) of synthetic resin
  • polyester fibers excelling in resistance to hydrolysis have been developed.
  • the durability of the textile of a woven and/or knitted product against wet heat has been improved considerably, and under the present situation it is possible to provide the clothes which can be reused under the above conditions.
  • a fundamental object of the present invention is to provide a fastener product made of a synthetic resin such as a slide fastener of synthetic resin, a separable fastener of synthetic resin and a snap tape (a tape with a snap button) of synthetic resin, which product exhibits excellent durability against wet heat and is capable of maintaining the stable state of engagement without producing deterioration of strength, discoloration, etc. even when repeatedly left under the high-temperature and high-humidity atmosphere.
  • a further object of the present invention is to provide a recyclable fastener product made of a synthetic resin such as a slide fastener of synthetic resin, a separable fastener of synthetic resin and a snap tape of synthetic resin, which product is excellent in both the resistance to moist heat and resistance to hydrolysis.
  • the fundamental mode of the present invention provides an engagement member made of a synthetic resin comprising an attachment part and an engagement part, which member is characterized by the fact that at least the engagement part mentioned above is made of a hydrolysis-resistant synthetic resin.
  • attachment part refers to a part to which an engagement part is attached or a part to be utilized for attachment to the other products, such as a fastener tape of a slide fastener, a base portion or base fabric of a separable fastener or surface fastener, and a tape of a snap tape or snap fastener.
  • engagement part refers to such parts as coupling elements of a slide fastener, engagement elements like hooks and/or loops of a separable fastener, and male and/or female detachably fitting parts of a snap tape or snap fastener.
  • the hydrolysis-resistant synthetic resin material mentioned above is polyester having a carbodiimide-based hydrolytic stabilizing agent incorporated therein.
  • a slide fastener made of a synthetic resin having a pair of fastener tapes and coupling elements fixed to the edges of the fastener tapes and characterized by the fact that the fastener tapes and the coupling elements mentioned above are made of a hydrolysis-resistant synthetic resin material.
  • the sewing threads and/or the core cords may be made of a hydrolysis-resistant synthetic resin material.
  • the upper and lower stop members may be made of a hydrolysis-resistant synthetic resin material as in the case of the other component parts mentioned above.
  • the pin-and-box separator and the reinforcing sheet-like members mentioned above may be made of a hydrolysis-resistant synthetic resin material as in the case of the other component parts mentioned above.
  • a slide fastener in any of the cases mentioned above a slide fastener has substantially all the component parts thereof made of the same chemical type or system of material.
  • the slider itself may be manufactured from a metallic material etc. and it has no problem in terms of resistance to hydrolysis.
  • the slider may be made of the same chemical type of synthetic resin material as the other component parts mentioned above.
  • a separable fastener made of a synthetic resin comprising a base part and an engagement part composed of a multiplicity of engaging elements formed on the obverse side of the base part and characterized by the fact that the base part and the engagement part mentioned above are made of a hydrolysis-resistant synthetic resin material.
  • a snap tape or a snap fastener made of a synthetic resin comprising a tape and an engagement part composed of male and/or female detachably fitting parts formed on the tape and characterized by the fact that the tape and the engagement part mentioned above are made of a hydrolysis-resistant synthetic resin material.
  • the fastener products of synthetic resin of the present invention are made of a hydrolysis-resistant synthetic resin, particularly polyester having a carbodiimide-based hydrolytic stabilizing agent incorporated therein, they exhibit excellent durability against wet heat and are capable of maintaining the stable state of engagement for a long period without producing deterioration of strength and degradation of the material due to hydrolysis, particularly change in the form of engagement part, and securing the stable state of the tape or base part to which the engagement part is attached, even when repeatedly left under the high-temperature and high-humidity atmosphere.
  • the sewing threads are also manufactured from a hydrolysis-resistant synthetic resin material, it is possible to provide a fastener product of synthetic resin which hardly incurs breakage of the sewing threads.
  • a slide fastener when the core cords are also manufactured from a hydrolysis-resistant synthetic resin material, the attached state of coupling elements becomes more stable. Accordingly, they can be advantageously used as fastener products to be attached to clothes such as working clothes to be used in a clean room of a pharmaceutical factory and those used in a hospital, medical service sites, nursing facilities, and the like which are repeatedly subjected to a sterilization treatment with high-temperature and high-pressure steam.
  • the present inventors after pursuing a diligent study on the use of the fastener products of synthetic resin such as a slide fastener of synthetic resin, a separable fastener of synthetic resin and a snap tape of synthetic resin under the high temperature and high humidity atmosphere, have found that the fastener products as mentioned above made of a hydrolysis-resistant synthetic resin, particularly a synthetic resin having a carbodiimide-based hydrolytic stabilizing agent incorporated therein exhibit excellent durability against wet heat, are capable of maintaining the stable state of engagement without producing such defects as deterioration of strength and discoloration even when repeatedly left under the high-temperature and high-humidity atmosphere, fulfill such characteristics as mechanical properties, resistance to wear and durability to withstand the friction due to the sliding motion which are expected of any fastener products for a long period, and are recyclable as well.
  • the present invention has been perfected as a result.
  • the fundamental technical idea of the present invention consists in manufacturing the component parts of fastener products with a synthetic resin material which exhibits excellent resistance to moist heat and to hydrolysis. It is provided, however, that there are times when the slider itself should be manufactured from other synthetic resin or a metal, depending on the function or construction which is expected from the slide fastener. In this case, the slider can be manufactured from the material which is so needed. In the case of the slide fastener using the slider of this description, it is relatively easy to recover the slider selectively from the discarded slide fastener and the discarded plastic materials emanating from the production line can be wholly reclaimed.
  • the fastener products of synthetic resin of the present invention exhibit excellent durability against wet heat, they are capable of maintaining the stable state of engagement for a long period without producing degradation of the material due to hydrolysis, particularly change in the form of engagement parts such as coupling elements, snap buttons and engagement elements, and securing the stable state of the tape or base part to which the engagement parts such as coupling elements are attached, even when repeatedly subjected to washing and autoclaving.
  • the individual component parts of the fastener product are manufactured from the same chemical type of synthetic resin material, it is possible to provide recyclable fastener products of synthetic resin. Further when the cloths of clothing on which the fastener products are fitted are manufactured from the same chemical type synthetic resins as those of the fastener products, it is made possible to recycle the whole clothing having the fastener products attached thereto.
  • the hydrolysis-resistant synthetic resin material used in the present invention means a synthetic resin having a hydrolytic stabilizing agent incorporated therein.
  • synthetic resin various synthetic resin materials such as polyester, polycarbonate, a polymer blend of polycarbonate/polyester, and nylon may be used. Since polyester is commonly used as the raw material for the hydrolysis-resistant cloths of clothing, polyester such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) is more preferable in terms of recycle use and such characteristics as mechanical properties, durability to withstand the friction due to the sliding motion and resistance to wear which are expected of any fastener products.
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • R and R' represent C 4 -C 20 substituted or unsubstituted alkyl groups, substituted or unsubstituted aryl groups, wherein substitutions being halogen atom, nitro group, amino group, sulfonyl group, hydroxyl group, alkyl group, or alkoxy group, and wherein R and R' may or may not be the same.
  • 2,2',6,6'-tetraisopropyldiphenyl carbodiimide a bis-carbodiimide produced by Rhein-Chemie GmbH of Germany and marketed under the trademark designation of STABAXOL
  • aromatic polycarbodiimides such as 2,4-diisocyanate-1,3,5-tris(1-methylethyl) copolymer with 2,6-diisopropyldiisocyanate and benzene-2,4-diisocyanato-1,3,5-tris(1-methylethyl) homopolymer may be cited.
  • a hydrolytic stabilizing agent may be added to the synthetic resin material in an amount of about 1 to 5% by weight, preferably 1.5 to 2.5% by weight.
  • the hydrolytic stabilizing agent mentioned above is generally produced as a masterbatch made of a career resin and a hydrolytic stabilizing agent.
  • the masterbatch may comprise about 70 to 98% by weight of a career resin and about 2 to 30% by weight of a hydrolytic stabilizing agent.
  • the most preferable proportion is 15% by weight of the hydrolytic stabilizing agent to 85% by weight of the career resin.
  • the career resin is preferred to be the same chemical type as a synthetic resin material.
  • Monofilaments or multifilaments may be produced by kneading such hydrolytic stabilizing agent-containing masterbatch chips and synthetic resin pellets and melt-extruding the resultant blend. They are used for weaving and/or knitting a fastener tape of a slide fastener, manufacturing sewing threads and core cords, weaving and/or knitting a base fabric and engagement elements of a separable fastener and a tape of a snap tape according to the present invention. Coiled coupling elements of a slide fastener may be manufactured from the monofilament. Further, coupling elements, separable fasteners, snap buttons, etc. may be formed by injection molding.
  • Fig. 1 illustrates a slide fastener 1 which is used for opening and closing the opening in a garment or a bag and depicts the form of a product having the upper and lower ends of laterally paired fastener stringers 2 cut off.
  • the fastener stringers 2 are composed of fastener tapes 3 made of hydrolysis-resistant synthetic resin and a row of coupling elements (coiled coupling elements) 4 made of hydrolysis-resistant synthetic resin attached fast to each of the opposed longitudinal edges of the fastener tapes 3.
  • the fastener tapes 3 are formed by weaving and/or knitting hydrolysis-resistant synthetic resin fibers, manufactured from a non-woven fabric, or made of a sheet of hydrolysis-resistant synthetic resin.
  • the coupling elements 4 are known in various forms such as, for example, those of the type obtained by injection molding the individual coupling elements and simultaneously attaching them fast to the edges of the fastener tapes, the continuous coupling elements such as the coiled coupling elements obtained by winding a monofilament of hydrolysis-resistant synthetic resin in the shape of a coil and the so-called zigzag coupling elements obtained by alternately connecting vertically in a zigzagging pattern in the longitudinal direction the portions bent in the shape of a letter U in the lateral direction in a plane, and the extrusion molded coupling elements obtained by attaching the opposite end portions of the individual coupling elements by means of extrusion molding to the two separate connecting cords (core cords) laid parallel to each other in the longitudinal direction thereby forming a composite resembling a ladder and bending the composite in the shape of a letter U around the longitudinal center line thereof.
  • the continuous coupling elements such as the coiled coupling elements obtained by winding a monofilament of hydrolysis-resistant
  • the reference numeral 5 denotes a slider which is slidable along the opposed rows of coupling elements for making and breaking engagement of the coupling elements.
  • a slide fastener 1a illustrated in Fig. 2 is in a form having the upper ends of the two fastener stringers 2 cut off. It is different from the slide fastener illustrated in Fig. 1 in respect that a lower stopping part 6 is formed by fusing the prescribed lower portions of the engaged rows of coupling elements 4.
  • a slide fastener 1b illustrated in Fig. 3 is different from the slide fastener illustrated in Fig. 1 in respect that upper stop members 7 are attached respectively to the upper ends of the rows of coupling elements 4b attached fast to fastener tapes 3b of fastener stringers 2b and a lower stop member 8 is attached to the lower ends thereof.
  • the upper and lower stop members mentioned above are manufactured from a hydrolysis-resistant synthetic resin material.
  • Fig. 4 illustrates an open-link type slide fastener 1c.
  • reinforcing sheet-like members (taffeta) 9 made of hydrolysis-resistant synthetic resin are welded through the medium of an adhesive layer (not shown).
  • a box member 11 of a pin-and-box separator 10 made of hydrolysis-resistant synthetic resin is attached to the inner edge of one of the opposed reinforcing sheet-like members 9 and a butterfly rod or pin 17 made of hydrolysis-resistant synthetic resin is attached to the inner edge of the other reinforcing sheet-like member 9.
  • the box member 11 is formed integrally with a guide projecting part 13 adjoining the box member 11 and a box rod 12 and a groove 14 is formed as interposed between the box rod 12 and the guide projecting part 13 so as to admit therein the lower end part of the slider 5 by slippage.
  • a guide groove 19 is formed between the butterfly rod 17 and a guide ridge 18 formed integrally with the adjoining butterfly rod 17.
  • a butterfly rod inserting hole 15 is formed as pierced in the vertical direction in the left side portion of the box member 11 and a lateral groove 16 is formed on the outer wall of the butterfly rod inserting hole 15.
  • the reference numeral 20 denotes a core cord which is inserted in the longitudinal direction through the empty space inside the spiral of the coiled coupling element 4c and the reference numeral 21 denotes a sewing thread sewing the core cord 20 and the coiled coupling element 4c along the longitudinal edge of the fastener tape 3c. Both of them are manufactured from a hydrolysis-resistant synthetic resin material.
  • the pin-and-box separator does not need to be limited to what is illustrated in Fig. 4.
  • the so-called reverse open-link type using the same box member as in the construction of the slider 5 and enabling the slider fastener to effect junction and disjunction of the opposed rows of coupling elements at the lower end thereof, for example, has been known as one version thereof.
  • the embodiment uses reinforcing sheet-like members which are formed separately of the pin-and-box separator and welded to the lower end portion of each of the fastener tapes.
  • the reinforcing sheet-like members do not need to be limited to this particular construction.
  • the reinforcing members can be integrally formed with the pin-and-box separator as found, for example, in a construction which has a sheet-like portion produced by injection molding a synthetic resin material integrally with a box member or a butterfly rod and fixed to the entire width of the fastener tape or a construction which has slits of an arbitrarily selected pattern inserted in a sheet-like portion thereby imparting flexibility thereto.
  • FIG. 5 through Fig. 9 illustrate examples of coupling elements which are formed by coiling a monofilament of hydrolysis-resistant synthetic resin.
  • Fig. 6 illustrates an example of having sewn to the longitudinal edge of a fastener tape 3d with a sewing thread 21 of hydrolysis-resistant synthetic resin a coiled coupling element 4d having the core cord 20 inserted through the empty space within a spiral in the longitudinal direction as illustrated in Fig. 5.
  • Fig. 7 illustrates an example of having a coiled coupling element 4e attached to the longitudinal edge of a fastener tape 3e as encircled with the tape at the same time that the tape is woven.
  • Fig. 9 illustrates an example of having sewn to the longitudinal edge of a fastener tape 3f with the sewing thread 21 a coiled coupling element 4f having no core cord inserted through the empty space within a spiral as illustrated in Fig. 8.
  • Fig. 10 illustrates a so-called zigzag coupling element 4g which is obtained by forming U-shaped bends of a monofilament of hydrolysis-resistant synthetic resin each lying laterally in a plane and alternately connecting the U-shaped bends vertically in the longitudinal direction.
  • the vertically adjacent bends are sewn with the sewing thread 21 to the longitudinal edge of a fastener tape 3g nipped therebetween.
  • Fig. 12 through Fig. 14 illustrate an example of attaching the opposite end portions of regularly spaced individual coupling elements 4h by means of an extruder to two separate connecting cords (core cords) 20h laid parallel to each other in the longitudinal direction thereby forming a composite resembling a ladder as illustrated in Fig. 12, bending the composite in the shape of a letter U around an engaging portion 22 as a center as illustrated in Fig. 13, and sewing the bent composite to the longitudinal edge of a fastener tape 3h with the sewing thread 21 as illustrated in Fig. 14.
  • FIG. 15 and Fig. 16 illustrate an example of attaching a core cord 20i by weaving into the longitudinal edge of a fastener tape 3i at the same time that the tape is woven and attaching individual coupling elements 4i of hydrolysis-resistant synthetic resin by injection molding as regularly spaced to the longitudinal edge swelled into a circular cross section of the fastener tape 3i formed as described above.
  • the sewing threads and core cords (connecting cords) mentioned above are also manufactured from a hydrolysis-resistant synthetic resin material.
  • the slide fastener of hydrolysis-resistant synthetic resin according to the present invention can be applied not only to the slide fasteners of the types illustrated in Fig. 1 through Fig. 16 but also to various fastener products. It can be applied, for example, to a railed fastener product, i.e. a fastener of the type having a groove formed along the edge of one of paired opposed sheet members of a container bag and a ridge matched to the groove and formed similarly on the other sheet member such that the bag is closed by bringing the groove and the ridge into mutual engagement.
  • a slider adapted to slide along the opposed edges of the bag for the purpose of closure is utilized.
  • the selection of the type of slide fastener product for proper application of the material depends also on the kind of synthetic resin to be used for the product.
  • nylon 6 and nylon 66 among other polyamide resins are suitable for such slide fasteners as are shown in Fig. 1 through Fig. 16 and nylon 11 and nylon 12 are suitable for the railed fastener product.
  • the polyester resins are suitable for both the slide fasteners and the railed fasteners.
  • Fig. 17 is a partial perspective view of a male fastener member illustrating a structural example of typical hook-like engaging elements of the molded (injected) type
  • Fig. 18 is a partially cross-sectioned side view representing the state before engagement with loop-like engaging elements of the opposite female fastener member.
  • the component parts of these male fastener member 30 and female fastener member 40 are manufactured from the hydrolysis-resistant synthetic resin material mentioned above according to the present invention.
  • a hook-like engaging element 32 raised from a base part 31 has a stem 34 which has a rear surface 34a rising obliquely in a smooth curve from the base part 31 and a front surface 34b rising upwardly from the base part 31, and a hook-like engaging portion 33 extending forwardly and curving downwardly from a distal end of the stem 34.
  • the stem 34 has on one side surface a first reinforcing rib 35 perpendicularly rising from the base part and on both sides thereof second reinforcing ribs 36 raised from the base part.
  • the first reinforcing rib 35 projects upwardly with respect to the rear surface of the hook-like engaging portion 33 to a predetermined extent and terminates in an arcuate upper end to assume an equilateral triangle.
  • the height of the apex O 3 of the first reinforcing rib 35 is defined to be smaller than the height of an apex O 2 of the hook-like engaging portion 33.
  • the apex O 3 of the first reinforcing rib 35 is set at the height above a tangent line which touches the hook-like engaging portion 33 at the lowest tip O 1 of hooked leading end and which is substantially parallel to the upper surface of the flat base part 31.
  • the second reinforcing ribs 36 are set at the height lower than that of the first reinforcing rib 35 and has a mount-like shape with its arcuate top surface and skirt parts enlarging downwardly.
  • Fig. 19 and Fig. 20 illustrate an embodiment of applying the present invention to a woven separable fastener, i.e. a separable fastener which is manufactured by preparing monofilaments or multifilements of the hydrolysis-resistant synthetic resin according to the present invention and interweaving them.
  • a male fastener member 60 shown in Fig. 20 is identical in structure with the female fastener member 50 mentioned above except that the pile loops protruding from the obverse side of the base part 61 are partially cut to form hook-like engaging elements 62.
  • coating layers 53, 63 of synthetic rubber or synthetic resin are applied to the reverse sides of the base parts (base fabrics) 51, 61 respectively, for the purpose of preventing the loop-like and hook-like engaging elements 52, 62 from being left out and to impart the shape retention property to the bas parts.
  • Fig. 21 is a view schematically illustrating a warp-knitted base fabric 70 for a separable fastener which functions as a female fastener member to be attached to a breathable product.
  • the warp-knitted base fabric 70 for a separable fastener is manufactured by knitting a base texture out of pile knitting yarns and ground yarns to form on wales 71 a multiplicity of pile loops (loop-like engaging elements) 72 serving as engagement elements of a separable fastener and passing insertion yarns in the wales direction and the course direction according to the marquisette texture so that a multiplicity of stitches 73 of the substantially rectangular shape serving as breather portions are formed between wales 71.
  • Fig. 22 illustrates an example of the texture of the pile knitted part of the warp-knitted base fabric 70 (strip tape before severing) for separable fasteners.
  • the pile knitted part is composed of the pile formation threads 74 which forms the pile loops 72 and the two needle stitching threads 75 and lateral insertion threads 76 which form the ground.
  • the pile formation thread 74 consists of a multifilament and is used for forming pile loops 72 by a sinker by overfeeding more positively than other threads.
  • the pile formation thread 74 is used to form the pile loops 72 every other course while lapping with an adjoining knitting needle and, as shown by the structural diagram of the pile knitted part in Fig.
  • a coating material such as synthetic rubber and synthetic resin is applied to the reverse side of the base fabric to stabilize a ground texture and engaging elements.
  • such coating is not necessary when closed stitches are formed in the pile loops which constitute engaging elements and the chain yarns which form the ground texture.
  • monofilament threads or multi-filament threads are used when knitting the base fabric of a female fastener member, and monofilament threads are used when knitting the base fabric of a male fastener member.
  • These knitting yarns and the threads which constitute the ground texture are manufactured from the hydrolysis-resistant synthetic resin according to the present invention.
  • Fig. 23 illustrates an example of application of the present invention to a snap tape, i.e. snap buttons integrally attached to a tape.
  • this snap tape 80 In the manufacture of this snap tape 80, a plurality of fitting holes 82 are formed in a long tape 81 at predetermined intervals in advance, this tape is fed into a metal mold for molding, and ring-like base materials 83 that are components member for forming female fitting parts 84 and/or male fitting parts 85 are integrally injection-molded with the tape on both the obverse and reverse sides thereof so as to nip the peripheral edges of the fitting holes 82 mentioned above.
  • a plurality of base materials 83 having the same form and integrally molded on one and the same tape 81 in the longitudinal direction thereof at predetermined intervals as mentioned above are alternately formed into female engaging parts (hole parts) 86 and male engaging parts (protruding parts) 87 to form a product having female fitting parts 84 and male fitting parts 85 alternately and integrally fixed to one and the same tape 81.
  • the engagement is performed by snap-in fitting the male engaging part 87 into the female engaging part 86.
  • the base materials 83 are alternately formed into the female engaging parts 86 and the male engaging parts 87 in the longitudinal direction of the tape 81 at predetermined intervals, the female engaging parts (hole parts) 86 may be formed in one tape and the male engaging parts (protruding parts) 87 may be formed in other tape.
  • the tape 81 and the engagement parts composed of female fitting parts 84 and/or male fitting parts 85 mentioned above are manufactured from a hydrolysis-resistant synthetic resin according to the present invention.
  • the synthetic resin material is polyethylene terephthalate (PET)
  • PET polyethylene terephthalate
  • the slider which is required to possess high mechanical strength is made of polybutylene terephthalate (PBT) instead, with the PBT in the body portion of the slider reinforced with such reinforcing fibers as glass fibers.
  • PBT polybutylene terephthalate
  • the material that is obtained at all is in the form of a PET/PBT polymer blend.
  • the pin-and-box separator is preferred to be made of PBT likewise on account of mechanical strength.
  • the component parts of the fastener products can be simultaneously dyed in the same hue by piece dyeing because the materials for the component parts are invariably polyester.
  • a disperse dye is used preferably.
  • the disperse dye that can be used herein is known in various types such as, for example, quinone type disperse dyes, azo type disperse dyes, and anthraquinone type disperse dyes.
  • Various dyeing assistants in popular use such as leveling agents and dye fastness promotors can be additionally incorporated in a dye bath as is usually practiced. While various methods are available for the dyeing under discussion, the method of beam dyeing proves to be advantageous.
  • the reclaimed polyester may be used for manufacturing the fastener products such as slide fasteners, separable fasteners, and snap tapes again or for manufacturing other textile products and molded articles such as binding bands for packages and containers.
  • the reclaimed polyester When the reclaimed polyester is used as the raw material for other molded articles, it may incorporate therein a varying filler like such reinforcing fibers as glass fibers, carbon fibers, or aramid fibers or it may be blended with such other thermoplastic resin as PBT.
  • the slider, pin-and-box separator, coupling elements, and sewing thread which require high mechanical strength are preferred to use virgin PET or a blend of virgin PET with reclaimed PET.
  • the synthetic resin material is a polyamide
  • all the component parts of fastener products except a slider of a slide fastener i.e. fastener tapes, coupling elements, a pin-and-box separator, reinforcing sheet-like members, upper and lower stop members, sewing threads, and core cords of a slide fastener, a base part and engaging elements of a separable fastener, and a tape and engagement parts of a snap tape
  • the slider in a slide fastener can be made of the PBT mentioned above or a metal.
  • the component parts of a slide fastener excepting a slider As concrete examples of the use found for the reclaimed polyamide, the component parts of a slide fastener excepting a slider, separable fasteners, snap tapes and other similar fastener products, textile products, and molded articles may be cited.
  • the fastener products made of polyamide similarly to the fastener products made of polyester mentioned above, the component parts made of polyamide can be simultaneously dyed in the same hue by piece dyeing.
  • nylon 6, nylon 66, and copolymerized nylon may be cited.
  • auxiliary materials as lining cloths, core cloths, and sewing threads, and such resinous accessories as buttons and snaps for garments on which the recyclable fastener product made of a synthetic resin according to the present invention is fitted are made of the same or homologous hydrolysis-resistant synthetic resin as that of the fastener product, it is made possible to recover the used products wholly and utilize them for reclamation without requiring the individual component parts thereof to be separated and selected.
  • the regeneration of the slide fastener from a discarded PET material is advantageously attained by granulating the recovered PET to strand-like chips, subjecting the chips to drying under a vacuum and, as occasion demands, to solid-phase polymerization, and extrusion molding the resultant polymer into a monofilament.
  • the polymer may be molded into a sewing thread or multifilaments of a minute diameter.
  • the polymer may be injection molded to form other component parts.
  • the extrusion molded monofilament is drawn, formed in the shape of a coil, sewn to the edges of fastener tapes obtained by weaving and/or knitting PET fibers with the sewing thread, then heat set, and thereafter dyed to a desired color by piece dyeing.
  • What is important in this operation is that the water content of the dry chips be repressed to the lowest possible extent and the decline of the intrinsic viscosity (I.V.) or limiting viscosity number before and after the work of monofilament extrusion be restrained for ensuring manufacture of fastener stringers of prescribed quality.
  • I.V. intrinsic viscosity
  • limiting viscosity number before and after the work of monofilament extrusion be restrained for ensuring manufacture of fastener stringers of prescribed quality.
  • the decline of the intrinsic viscosity before and after the work of monofilament extrusion is considered to originate in the hydrolysis of the resinous material caused by the water contained in the chips and is liable to induce breakage of the monofilament during the course of drawing.
  • the water content of the dry chips therefore, should be restrained 50 ppm (0.005%) and less, preferably 30 ppm and less, and more preferably 20 ppm and less.
  • the water content should be kept 20 ppm and less, preferably 10 ppm and less, and more preferably 5 ppm and less in consideration of the possibility of breakage thereof.
  • Monofilaments manufactured from a mixture of PET and masterbatch chips (STABAXOL® KE9291 of Rhein-Chemie GmbH, consisting of a carrier resin PET (containing 5% of PE) containing 15% by weight of aromatic polycarbodiimide (STABAXOL® P100)) in a weight ratio of 7:1 were formed into coiled coupling elements.
  • Fastener tapes were prepared by weaving PET high-tenacity yarn (BRABER® of Asahi Kasei Kogyo K.K., containing no hydrolytic stabilizing agent) and sewing threads and core cords were also manufactured from the same PET high-tenacity yarn.
  • a slide fastener as shown in Fig. 1 was produced by using these component members.
  • a slide fastener was produced by following the procedure of Example except that only PET was used as a raw material for coiled elements.
  • Each of the slide fasteners prepared in Example and Comparative Example mentioned above was repeatedly subjected to autoclaving (126°C x 30 minutes ) and then tested for lateral tensile strength of a fastener stringer and for resistance to sliding motion when opening and closing a slide fastener in accordance with the methods described in JIS (Japanese Industrial Standard) S 3015.
  • the measurement results of the lateral tensile strength are shown in Fig. 24, the measurement results of the resistance to sliding motion when opening the slide fastener in Fig. 25, and the measurement results of the resistance to sliding motion when closing the slide fastener in Fig. 26.
  • the guarantee value specified as the lateral tensile strength of a fastener stringer is 60 kg and over.
  • the slide fasteners prepared in Example and Comparative Example satisfied this requirement even after 50 rounds of autoclaving, the slide fastener prepared in Comparative Example by using coiled elements manufactured from PET only had poor strength so as to cause breakages of coupling elements and sewing threads used for sewing coupling elements.
  • the guarantee value specified as the resistance to sliding motion in opening (when opening the slide fastener with a slider) and closing (when closing the slide fastener with a slider) is 700 g and under, respectively.
  • the slide fastener prepared in Example satisfied this requirement even after about 100 rounds of autoclaving, the slide fastener prepared in Comparative Example had a value far from this guarantee value and its coupling elements had coarse surfaces containing a plenty of cracks with hangnails.

Landscapes

  • Slide Fasteners (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
EP02254526A 2001-06-27 2002-06-27 Hydrolysebeständiges Harz für Verschlussvorrichtung Expired - Fee Related EP1269876B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001194563 2001-06-27
JP2001194563A JP2003009913A (ja) 2001-06-27 2001-06-27 耐加水分解性合成樹脂製ファスナー製品

Publications (3)

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EP1269876A2 true EP1269876A2 (de) 2003-01-02
EP1269876A3 EP1269876A3 (de) 2003-06-18
EP1269876B1 EP1269876B1 (de) 2009-12-09

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EP (1) EP1269876B1 (de)
JP (1) JP2003009913A (de)
KR (1) KR100851446B1 (de)
CN (1) CN1208006C (de)
DE (1) DE60234663D1 (de)
ES (1) ES2334645T3 (de)
HK (1) HK1051126A1 (de)

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EP1785051A1 (de) * 2005-11-15 2007-05-16 Velcro Industries B.V. Klettverschluss-Elemente mit Markierung und Verfahren zu deren Herstellung

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US8245365B2 (en) * 2004-12-23 2012-08-21 Illinois Tool Works Inc. Sleeve cover for slider
US20060277737A1 (en) * 2005-06-08 2006-12-14 Illinois Tool Works Inc. Method for applying soft cap to slider or zipper with mounted slider
JP2007215819A (ja) * 2006-02-17 2007-08-30 Ykk Corp 防水性スライドファスナーの下止
TWM312205U (en) * 2006-10-02 2007-05-21 Homer Zipper Co Ltd Heat-resistant, heat-insulating, burning-resistant zipper
JP4689631B2 (ja) * 2007-02-08 2011-05-25 Ｙｋｋ株式会社 液密スライドファスナー並びに液密スライドファスナーの製造方法
KR101428905B1 (ko) 2010-06-30 2014-08-08 와이케이케이 가부시끼가이샤 슬라이드 파스너 및 슬라이드 파스너의 제조 방법
WO2012081123A1 (ja) * 2010-12-17 2012-06-21 Ykk株式会社 ファスナーストリンガー及びファスナーチェーン、並びにファスナーチェーンの製造方法
JP5813122B2 (ja) * 2011-09-21 2015-11-17 Ykk株式会社 スライドファスナー
JP6017802B2 (ja) * 2012-03-07 2016-11-02 モリト株式会社 スライダーで開閉する集合ホック
JP2014027989A (ja) * 2012-07-31 2014-02-13 Kuraray Fastening Co Ltd 耳部を有する面ファスナー
CN103284410A (zh) * 2013-05-24 2013-09-11 江苏宏达拉链制造有限公司 一种耐摩擦拉链
US20170208906A1 (en) * 2014-10-27 2017-07-27 Ykk Corporation Slide Fastener and Method for Manufacturing Slide Fastener
CN108024602B (zh) * 2015-09-04 2020-07-28 Ykk株式会社 拉链链条及拉链

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EP1229061A1 (de) * 2001-01-31 2002-08-07 Kuraray Co., Ltd. Wässrige Harzzusammensetzung und Verfahren zur Herstellung eines trennbaren Verschlusses

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GB1471950A (en) * 1973-06-19 1977-04-27 Teijin Ltd Naphthalate polyester filaments
JPH02292318A (ja) * 1989-04-30 1990-12-03 Kuraray Co Ltd 硬化性組成物、これに配合されるポリウレタンポリオールおよび該硬化性組成物を用いて得られた面状フアスナー
US5436051A (en) * 1993-07-26 1995-07-25 Velcro Industries, B.V. Hook and loop fasteners and method of making same
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EP1229061A1 (de) * 2001-01-31 2002-08-07 Kuraray Co., Ltd. Wässrige Harzzusammensetzung und Verfahren zur Herstellung eines trennbaren Verschlusses

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HK1051126A1 (en) 2003-07-25
KR20030004084A (ko) 2003-01-14
KR100851446B1 (ko) 2008-08-08
DE60234663D1 (de) 2010-01-21
JP2003009913A (ja) 2003-01-14
EP1269876A3 (de) 2003-06-18
EP1269876B1 (de) 2009-12-09
CN1393190A (zh) 2003-01-29
ES2334645T3 (es) 2010-03-15
US20030000051A1 (en) 2003-01-02
CN1208006C (zh) 2005-06-29

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