Classifications

• • 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
  • A44B18/0076—Adaptations for being fixed to a moulded article during moulding
• • 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]
  • Y10T24/2725—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] with feature facilitating, enhancing, or causing attachment of filament mounting surface to support therefor
• • 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
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
  • Y10T428/24017—Hook or barb

Definitions

• the invention relates to a method for producing adhesive fastener parts comprising plastic fastener parts which cooperate with corresponding adhesive fastener elements of another fastener part to form an adhesive fastener.
• thermoplastic plastic in particular polyolefin or polyamide
• the molding roll has a screen, the cavities of which have been produced by etching or by means of a laser, the adhesive closure elements being produced solely by the fact that the thermoplastic material hardens in the open cavities of the screen of the molding roll.
• the thickenings of the stems mentioned are formed in the form of flattened or concave depressions mushroom heads.
• the adhesive fasteners produced in this way are used in a wide variety of ways, for example in motor vehicle technology, floor laying technology, for clothing of all kinds and in special fields of application in mechanical engineering.
• the adhesive fasteners have proven themselves in these areas as a detachable and functionally reliable connection and locking technology.
• the object of the invention is to further improve a method for producing adhesive fastener parts having plastic fastener elements in such a way that adhesive fasteners are realized with expanded possible uses.
• a corresponding object is achieved by a method having the features of claim 1.
• the adhesive fastener part with the adhesive fastener elements is at least partially provided with a coating whose layer thickness is selected such that the subsequent formation of the adhesive fastener is ensured, the possible uses for this can be selected via a suitable selection of the coating material Significantly expand fasteners. Furthermore, they can be provided with new advantageous properties for the closure technology via the respective coating.
• that side of the sealing part with the adhesive closure elements is at least partially provided with a foam-repellent coating. The backs of the adhesive fastener parts produced are suitable for establishing a permanent connection with foam materials when they are being foamed, the adhesive elements being exposed.
• the adhesive fastener elements can be connected to corresponding adhesive fastener elements (loops or hooks) of the other fastener part to form a known adhesive fastener , for example to fix upholstery materials on the foamed upholstery.
• the manual removal of the covering materials in question is time-consuming and therefore cost-intensive, as is the provision of the covering materials, which are otherwise to be disposed of in an environmentally friendly manner.
• the adhesive fastener part is at least partially provided with a foam-repellent coating with the adhesive fastener elements, the coating effectively counteracts the penetration of the foam material when foaming and although the foam can have viscosities that are lower than that of water, penetration can be completely avoided become. It is surprising for a person skilled in the field of foaming technology for foam materials that, by selecting a suitable coating, he can do without the complex, costly covering technology.
• the coating is preferably designed as a nanocomposite coating, i.e. the layer thickness is extremely small and can only have a few molecular thicknesses of the respective coating agent. Due to this small layer thickness, the adhesive fastener elements can be completely covered, but are still not impaired in their functionality, i.e. they can be connected to other optionally coated adhesive fastener elements of another adhesive fastener part to form the adhesive fastener.
• the coating is formed by means of a sol-gel method, which in turn can be sprayed or knife-coated in a nanocomposite manner, for example onto the foam-repellent side of the adhesive fastener part.
• the coating is provided with ferromagnetic properties, so that the very flat and preferably with plate-shaped ends of the adhesive fastener elements can easily be inserted by hand into the foam mold provided with magnets, where they can be see forces of the coating agent are held, with the result that additional fixing aids can be dispensed with.
• the respective coating agent is selected in such a way that the penetration of the foam material into a narrow edge area of the adhesive closure part is made possible, with the result that there is also a firm connection with the foam material, which would later result in unwanted tearing or peeling of the such foamed adhesive closure from the foam body significantly more difficult.
• the respective coating is provided with color additives and / or with media for protection against ultraviolet radiation. Furthermore, it can be provided to provide the coating agent with microwave absorbing and / or reflecting and / or infrared absorbing and / or reflecting properties in order to increase the possible uses for the known closures.
• the additives in question including in the form of ferrite or magnetite material, may be in microencapsulated form, i.e. as encapsulation of finely dispersed, liquid or solid phases by coating with film-forming polymers which, after emulsification and coacervation or interfacial polymerization, are deposited on the material to be encased.
• FIG. 1 shows in cross section an adhesive closure part inserted into a foam mold; 2 shows an enlarged view of the adhesive closure part according to FIG. 1 provided with a coating.
• the fastener part 10 shown in FIG. 2 has a plurality of fastener elements 12 on its upper hinge side, which interact with correspondingly designed fastener elements of another fastener part to form a conventional fastener (not shown).
• the relevant adhesive fastener parts 10 are generally designed in the form of a band or, moreover, have a flat geometry and can be produced, for example, by a method as described in DE 196 46 318 A1.
• the adhesive fastener elements 12 produced in this way can only be a fraction of a millimeter in size and preferably have flat free ends for an effective connection to the correspondingly designed adhesive fastener elements.
• a foaming mold 16 is provided for the foaming process, which is often divided into two and into which the foam material 14 is introduced after it has been closed under pressure and temperature.
• the foam material 14 has hardened to form the intended foam body, for example made of polyurethane
• the foam body is removed from the mold, the adhesive fastener elements 1 2 then projecting on the free side of the foam body and the adhesive fastener part 10 being otherwise firmly connected to the foam 14.
• the foam mold 1 6 which usually has steel and / or magnetic inserts 1 8, the required amount is made by hand before the foaming process
• the adhesive fastener part 10 is inserted, the adhesive fastener elements 12 facing the foam mold 16.
• the foam material 14 cannot enter into the intermediate spaces between the adhesive fastener elements 12 in a damaging manner, they are at least partially provided with a foam-repellent coating 20, as is the side of the adhesive fastener part 10 which faces the adhesive fastener elements 12.
• the coating 20 is formed from a sol gel, which can be made oleophobic and / or hydrophobic. So that the functionality of the adhesive fastener elements 1 2 is not adversely affected, the sol gel is sprayed or doctored onto the foam-repellent side of the adhesive fastener part 10 as a nanocomposite coating. Nanocomposite means that the coating thickness is in the nanometer range of the coating material. The subsequent bond with the associated adhesive fastener elements of the other adhesive fastener part is therefore not impaired by a thin layer thickness.
• an alkaline sol in particular an alkaline ferrofluid
• this is generated by peptizing the precipitate with an aqueous 1 mol tetramethylammonium hydroxide solution
• the precipitate is stirred with an aqueous 2-M perchloric acid and then isolated by centrifugation.
• the peptization is completed by adding water.
• Iron concentrations greater than one molar can be obtained in these alkaline or acidic magnetic sols. It is surprising that a sol is only obtained if the ratio of iron (III) to iron (II) is greater than 2 (as in Fe 3 0 4 ).
• Sol is the name for a colloidal solution in which a solid or liquid substance is dispersed in a finely divided form in a solid, liquid or gaseous medium.
• gaseous dispersion media one speaks of aerosols, with solid ones vitreosols, with liquid ones lyosols. Lyosols are again divided into organosols and hydrosols, depending on whether the suspension is an organic or aqueous phase.
• Coagulation transforms a sol into a gel, whereby gels are the derived name of gelatin for stable, easily deformable dispersive systems known from colloid chemistry, rich in liquids and gases, consisting of at least two components, mostly consisting of a solid , colloidally divided substance with long or highly branched particles and a liquid (mostly water) as a dispersant.
• the Fe ⁇ O nanosol obtained in this way is mixed with a commercially available modified Si0 2 - or Si0 2 -Ti0 2 - sol and sprayed onto the fastener part 10 with its fastener elements 12 and fixed there by drying.
• the layer thickness is so thin that the effect of the individual fastener elements for the closure process is not adversely affected.
• the peptization referred to here means the transition of a coagulate into a disperse (colloidal) system. If a ferromagnet (eg ferrite) is added to the system for the ferromagnetic properties, this is done, for example, by means of microencapsulation by incorporation in the sol in a stable and at the same time flexible layer.
• microencapsulation is the name for the encapsulation of finely dispersed liquid or solid phases by coating with film-forming polymers, which are deposited on the material to be encased after emulsification and coacervation or interfacial polymerization.
• the microscopic capsules of this type (sometimes referred to as nanoencapsulation) can usually be dried. It is surprising for a person skilled in the field of fastener technology that the microencapsulated ferrites in question only settle slightly or not at all on the free ends of the fastener elements 12, but rather in the area of their stems or on the adjacent surface areas of the fastener part 10 to an increase in concentration in the direction of the fastener part.
• doctor blade processes or spraying processes are suitable for a sol-gel application to produce the desired nanocomposite coating, the percentage by weight of the ferromagnetic content in the coating composition being between 5 and 70%, but preferably being 30%.
• magnetite can also be precipitated in order to obtain a ferromagnetic sol gel.
• An improved, anti-foaming effect can still be achieved if a hydrophobizing agent is added to the coating agent 20, the viscosity of the coating agent being adjustable by means of ethanol.
• the following recipe can be used as an exemplary embodiment for a ferromagnetic coating:
• the viscosity of the solution is adjusted with ethanol depending on the coating process, with a further increase in the concentration of ferrite in the base of the coating being determined if the coating composition is sufficiently low.
• the coating 20 can be applied to the adhesive fastener part 10 by padding, dipping, spraying, pouring, vapor deposition, laminating or knife coating and laminating.
• the coating 20, as shown in FIG. 2 can optionally completely encase the individual adhesive closure element 12 with different wall thicknesses; the application in question, for example by lamination or knife coating and laminating, can also consist only in the fact that the free ends of the adhesive fastener elements 12 are coated, but not their stems or that side of the adhesive fastener part 10 which faces the adhesive fastener elements 12.
• the respective layer can also be cured in the form of drops or form sections of layer pieces that are separated from one another in sections.
• the coating 20 is mixed with ferrite or magnetite or other additives, the additives can accumulate on the bottom of the adhesive fastener part 10 due to the weight.
• a spray adhesive is used as the coating agent 20, it preferably has 10% magnetite, 10% solvent-containing polyurethane (steel Su9182) and 80% ethanol.
• a carrier material for example in the form of a film or paper, is provided with 40% magnetite and 60% solvent-containing polyurethane and placed on the top of the adhesive fastener elements 12 in this way. After drying out, the lamination material (film or paper) is then pulled off the adhesive fastener part 10 and the transfer agent or laminate is permanently part of the adhesive fastener part 10 as a coating.

Landscapes

• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Coating Apparatus (AREA)
• Glass Compositions (AREA)
• Portable Nailing Machines And Staplers (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (2)

Family

ID=8166961

Family Applications (1)

Country Status (9)

Families Citing this family (12)

Family Cites Families (6)

• 1998
  • 1998-05-22 US US09/582,713 patent/US6572727B1/en not_active Expired - Fee Related
  • 1998-05-22 JP JP2000550355A patent/JP4018338B2/ja not_active Expired - Fee Related
  • 1998-05-22 ES ES98928314T patent/ES2206940T3/es not_active Expired - Lifetime
  • 1998-05-22 WO PCT/EP1998/003055 patent/WO1999060880A1/fr active IP Right Grant
  • 1998-05-22 AT AT98928314T patent/ATE247912T1/de not_active IP Right Cessation
  • 1998-05-22 DE DE59809437T patent/DE59809437D1/de not_active Expired - Lifetime
  • 1998-05-22 EP EP98928314A patent/EP1082031B1/fr not_active Expired - Lifetime
  • 1998-05-22 DK DK98928314T patent/DK1082031T3/da active
  • 1998-07-09 ZA ZA9806078A patent/ZA986078B/xx unknown

Non-Patent Citations (1)

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