Skin-friendly hook fastening component
View Patent ↗A skin-friendly hook component of a hook and loop fastener that reduces or eliminates the occurrence of red-marking and/or irritation if brought into contact with a wearer's skin. In one embodiment, the hook component can have a relatively large top surface area among the hooks with respect to a surface area of the hook backing. In another embodiment, the hook backing is highly flexible, attributable to a flexible resin and/or modified topography. In yet another embodiment, a highly flexible polymer, or polymers, can be used to make individual hooks such that the hooks bend in response to a minimum amount of pressure. Various illustrated hook tapes have features along their edges to enhance skin-friendliness. A skin-friendly hook component results any combination of the disclosed embodiments. The hook component is particularly beneficial when used in absorbent articles.
1. A hook component for use with a mating loop component for hook and loop fastening, the hook component including a hook backing and a plurality of hooks protruding from one side of the hook backing, wherein
the hook component has an overall aspect ratio within a range of 20 to 55 percent, aspect ratio being defined as aggregate hook head area, measured at an elevation above the hook backing that includes a maximum overhang of heads of the hooks, divided by an overall area of the hook component;
the hook backing has a non-uniform thickness with areas of greater thickness about the hooks and areas of lesser thickness between the hooks; and
each of the hooks comprises a polymer having a bulk flexural modulus in a range of 7 kpsi (48 MPa) to 30 kpsi (207 MPa).
2. A hook component for use with a mating loop component for hook and loop fastening, the hook component including a hook backing and a plurality of hooks protruding from one side of the hook backing;
wherein the hook component has an overall aspect ratio within a range of 40 to 55 percent, aspect ratio being defined as aggregate hook head area, measured at an elevation above the hook backing that includes a maximum overhang of heads of the hooks, divided by an overall area of the hook component.
3. The hook component of claim 2 having an overall aspect ratio within a range of 45 to 50 percent.
4. The hook component of claim 2 having an overall aspect ratio of about 47 percent.
5. The hook component of claim 2 , wherein the hooks comprise a polymer selected from the group consisting of elastomeric thermoplastic polymers and metallocene catalyzed polymers.
6. The hook component of claim 2 , wherein the hooks are J-shaped.
7. The hook component of claim 2 , wherein the hooks have heads of molded resin.
8. The hook component of claim 2 , wherein the hooks each have at least one flat lateral side.
9. An absorbent article comprising the hook component of claim 2 .
10. A diaper comprising the hook component of claim 2 .
11. A training pant comprising the hook component of claim 2 .
12. A feminine hygiene product comprising the hook component of claim 2 .
13. An incontinence product comprising the hook component of claim 2 .
14. A medical garment comprising the hook component of claim 2 .