Loop fastener material for diaper and related method
AssigneeTietex International, Ltd.
InventorMartin Wildeman
Life of this patent
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Abstract
A composite loop face fabric which incorporates a multi-bar stitch-bonded construction and related fastening system. A yarn system forms an arrangement of surface loops extending in stitched relation through a composite nonwoven substrate incorporating one or more layers of melt blown nonwoven fibrous material in sandwiched relation to one or more layers of spunbond nonwoven fibrous material. Multiple layers of melt blown nonwoven material and/or spunbond nonwoven material may be used if desired.
Claims20
A diaper having a releasable fastening system, the fastening system comprising:
- a fastening tab including a segment of hook material having a plurality of outwardly projecting hooking elements;
- and
- a segment of loop material disposed at a portion of the diaper remote from the fastening tab, the segment of loop material including a plurality of outwardly projecting loop elements adapted to engage the hooking elements in juxtaposed contacting relation, wherein the loop material comprises a composite sheet of stitch bonded construction including a multi-layer nonwoven substrate with a first plurality of yarn elements extending in stitched relation through the substrate layer to define a ground layer of flat stitches, and wherein the composite sheet of stitch bonded construction further includes a second plurality of yarn elements extending in stitched relation through the substrate layer in zigzag crossing relation between parallel needle lines to define said plurality of outwardly projecting loop elements extending above the ground layer of flat stitches, wherein the multi-layer nonwoven substrate comprises at least one layer of a melt blown nonwoven fibrous material disposed in sandwiched relation between covering layers of spunbond nonwoven fibrous material, and wherein the loop material has a weight of not greater than about 45 grams per square meter.
A diaper having a releasable fastening system, the fastening system comprising:
- a fastening tab including a segment of hook material having a plurality of outwardly projecting hooking elements;
- and
- a segment of loop material disposed at a portion of the diaper remote from the fastening tab, the segment of loop material including a plurality of outwardly projecting loop elements adapted to engage the hooking elements in juxtaposed contacting relation, wherein the loop material comprises a composite sheet of stitch bonded construction including a multi-layer nonwoven substrate with a first plurality of yarn elements extending in stitched relation through the substrate layer to define a ground layer of flat stitches substantially covering an upper surface of the substrate layer, and wherein the composite sheet of stitch bonded construction further includes a second plurality of yarn elements extending in stitched relation through the substrate layer in zigzag crossing relation between parallel needle lines to define said plurality of outwardly projecting loop elements extending above the ground layer, wherein the multi-layer nonwoven substrate comprises at least one layer of a melt blown nonwoven polypropylene fibrous material disposed in sandwiched relation between covering layers of spunbond nonwoven polypropylene fibrous material, and wherein the loop material is characterized by a Frasier air permeability of not greater than about 300 CFM per square foot at a differential water pressure of 0.5 inches of water when tested according to ASTM test method D737 and wherein the loop material has a weight of not greater than about 40 grams per square meter.
Dependencies are inferred from the claim text.