US 5,122,407 A · Odor-removing cover for absorbent pads and method of making same

Abstract

An absorbent pad has a cover formed of non-woven fibrous material, which is coated with a fluorocarbon polymer and odor absorber(s). The cover sheet is apertured around a critical zone to overcome undesired surface tension effects. The method of producing the cover includes providing a water-based mixture that includes 1% by weight of a fluorocarbon composition. An odor absorbing reagent is added to the mixture which then is applied to a nonwoven web of fibrous material. The treated web is dried to remove the excess water from the mixture, and the fluorocarbon composition component is cured to form a hydrophobic coating around the reagent and to bind the reagent to the web. The drying and curing steps can be accomplished by applying a flow of air heated to a temperature in a range from about 100.degree. C. to about 120.degree. C. to the web until the water has been removed.

Claims35

Dependent claims

A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising:

(a) a liquid ad vapor permeable cover having a periphery, the cover including:
(i) a nonwoven web having a zone wherein from about 6 to about 1100 apertures are defined by the web within the zone;
(ii) a liquid impermeable and vapor permeable fluorocarbon composition adhered to said web, and
(iii) an odor absorbing reagent bound to said web by said fluorocarbon composition, said reagent being rendered hydrophobic by said composition;
(b) a liquid and vapor impermeable baffle having a periphery;
and
(c) a liquid absorbent material disposed between said cover and said baffle;
and
wherein the cover and the baffle are in general juxtaposed position with respect to each other and are joined to each other at their respective peripheries.

6 more elements

A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising:

(a) a liquid and vapor permeable cover having a periphery, the cover including:
(i) a nonwoven web formed from fibers selected from the group consisting of polyester fibes, polyamide fibers, cellulosic fibers or polyolefin fibers the nonwoven web having a zone wherein from about 6 to about 1100 apertures per square inch are defined by the web within the zone;
(ii) a liquid impermeable and vapor permeable fluorocarbon composition selected from the group consisting of perfluoroalkyl acrylic copolymer or polytetrafluoroethylene adhered to said web;
and
(iii) odor absorbing material, selected from the group consisting of one or more of carbonates, bicarbonates, phosphates, biphosphates, sulfates d bisulfates of alkali and alkaline earth metals, ascorbic acid, boric acid, citric acid and maleic acid, bound to the web by the fluorocarbon composition, the reagent being rendered hydrophobic by the composition;
(b) a liquid and vapor impermeable baffle having a periphery, the baffle being formed from a film selected from the group consisting of polypropylene or polyethylene film;
and
(c) a liquid absorbent material, selected from the group consisting of cellulose, wood fluff, coform materials, meltblown materials, carded materials or sphagnum moss, disposed between the cover and the baffle;
and
wherein the cover and the baffle are in general juxtapose position with respect to each other and are joined to each other at their respective peripheries.

7 more elements

Dependencies are inferred from the claim text.

Odor-removing cover for absorbent pads and method of making same

Life of this patent

Odor-removing cover for absorbent pads and method of making same

Life of this patent

Abstract

Claims35