Surface fastener manufacturing method and surface fastener
AssigneeYKK Corporation
InventorsIsamu Michihata, Yui Miyawaki, Wataru Kuriyama
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Abstract
A method for manufacturing a surface fastener includes a molding step of molding the surface fastener by feeding a molten synthetic resin into a mold in which cavity spaces are provided, a separating step of separating engaging elements from the cavity spaces, and a distortion-removing step of deforming the engaging elements by heating the separated engaging elements to remove distortion generated in the engaging elements. This enables manufacturing of a surface fastener made of a synthetic resin containing a saturated polyester resin as a main component and not including a factor that impedes recycling of the saturated polyester resin.
Claims11
A surface fastener manufacturing method in which a surface fastener made of a synthetic resin is manufactured, the surface fastener including a base portion and a plurality of engaging elements provided on the base portion, the engaging elements each having a stem portion protruding from the base portion and an engaging portion located at a leading end portion of the stem portion the surface fastener manufacturing method comprising:
- a molding step of molding the surface fastener by feeding the molten synthetic resin into a mold in which cavity spaces are provided;
- a separating step of separating the engaging elements from the cavity spaces and
- a distortion-removing step of deforming the engaging elements by heating the separated engaging elements to remove distortion generated in the engaging elements after the separating step.
A surface fastener made of a synthetic resin and including a base portion elongated in a machine direction and a plurality of engaging elements provided on the base portion, the engaging elements each having a stem portion protruding from the base portion and an engaging portion located at a leading end portion of the stem portion, wherein
- a main component of the synthetic resin is a thermoplastic saturated polyester resin containing terephthalic acid as an acid component and ethylene glycol as a glycol component,
- a maximum dimension of each of the engaging elements in a cross direction orthogonal to the machine direction is 0.2 mm or more and 1.0 mm or less, and
- the plurality of engaging elements are arranged at a density of 30 elements/cm2 or more and 90 elements/cm2 or less.
Dependencies are inferred from the claim text.