# US 4,391,869 A · Nonwoven fibrous product

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- Number: US 4,391,869 A
- Document ID: US4391869A
- Status: Granted
- Kind: A
- Application number: 06/194,511
- Filed: 1980-10-06
- Granted: 1983-07-05
- Earliest claimed: 1980-10-06
- Assignees: Johnson & Johnson Baby Products Company
- Inventors: John R. Cook; William A. James
- Web page: https://patentgrep.com/patent/US4391869A

## CPC

- A61F 13/513: {characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect;} having areas of different permeability
- A61F 13/51121: {characterised by the material}
- A61F 13/202: {Catamenial tampons (A61F13/2022-A61F13/34 take precedence)}
- A61F 2013/15821: {characterized by the apparatus for manufacturing}
- A61F 2013/530131: {being made in fibre but being not pulp}
- A61F 2013/530182: {characterized by the connection between the fibres}
- A61F 2013/8488: {including testing apparatus}
- Y10T 428/24992: Density or compression of components
- Y10T 442/69: Autogenously bonded nonwoven fabric
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Nonwoven, air-laid fabrics formed predominantly of textile length, synthetic, resilient fibers of staple length, the fabric being resin-bonded and having a density less than about 0.06 gm/cc at 0.16 lb/sq. in. load and a weight less than 3 oz/sq. yd. The fabric is resin-bonded using a bonding solution providing less than 180% solution pickup and more than 15% dry solids add-on. The fabric is used as a facing or covering for disposable diapers, sanitary napkins, incontinent pads, tampons and the like.

## Claims

### Claim 1

A low density, resin-bonded, nonwoven fabric consisting essentially of wet resilient, dry resilient, synthetic, staple fibers, the fabric having a density less than about 0.06 gm/cc at 0.16 lb/sq. in. load, and a weight less than about 3 oz/sq. yd.

### Claim 2 (depends on 1)

The fabric of claim 1 wherein the synthetic, staple fibers are polypropylene, polyethylene, polyester, nylon or acrylic fibers or mixtures thereof.

### Claim 3 (depends on 1)

The fabric of claim 1 wherein the density is in the range from about 0.02 and about 0.05 gm/cc at 0.16 lb/sq. in. load.

### Claim 4 (depends on 3)

The fabric of claim 3 wherein the density is about 0.02 gm/cc at 0.16 lb/sq. in. load.

### Claim 5 (depends on 1)

The fabric of claim 1 wherein the synthetic, staple fibers are polyester fibers.

### Claim 6

A low-density, resin-bonded, nonwoven fabric comprising polyester staple fibers, the fabric having a density from about 0.02 to about 0.05 gm/cc at 0.16 lb/sq. in. load and a weight less than about 3 oz/sq. yd.