# US 10,869,783 B2 · Method for applying elastic strands

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- Number: US 10,869,783 B2
- Document ID: US10869783B2
- Status: Granted
- Kind: B2
- Application number: 16/084,827
- Filed: 2016-03-28
- Published: 2019-03-14
- Granted: 2020-12-22
- Earliest claimed: 2016-03-28
- Assignees: Kimberly-Clark Worldwide, Inc.
- Applicants: Kimberly-Clark Worldwide, Inc.
- Inventors: Bradley W. Schoon; Chadwick I. Romzek; Erica F. Creighton
- Web page: https://patentgrep.com/patent/US10869783B2

## CPC

- A61F 13/15593: {having elastic ribbons fixed thereto; Devices for applying the ribbons}
- A61F 13/15699: {Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs}
- B29C 70/56: Tensioning reinforcements before or during shaping
- 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)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)

## Abstract

A method of applying elastic members includes applying a construction adhesive; intermittently applying an elastic adhesive; positioning first and second elastics in an elongated condition such that a first portion of the elastics are positioned in contact with both the construction adhesive and the elastic adhesive in hold zones and a second portion of the elastics are positioned in contact with the construction adhesive but not the elastic adhesive in release zones; severing the elastics in the release zones; retracting the elastics through the construction adhesive in the release zones; and maintaining the elongation of the elastics in the hold zones.

## Claims

### Claim 1

A method of applying elastic members comprising,
providing a back sheet web having a first lateral side edge and a second lateral side edge, the back sheet web defining a back sheet width extending from the first lateral side edge to the second lateral side edge,
providing a top sheet web having a first lateral side edge and a second lateral side edge, the top sheet web defining a top sheet width extending from the first lateral side edge to the second lateral side edge,
providing a plurality of discrete absorbent cores,
providing a first elastic member web and a second elastic member web,
applying a first adhesive in a first adhesive pattern to define a first adhesive application width, wherein the first adhesive application width is at least 90% the top sheet width or the back sheet width,
intermittently applying a second adhesive in a second adhesive pattern to define alternating hold zones and release zones, wherein the second adhesive has a different composition and properties than the first adhesive,
positioning the first elastic member web, the second elastic member web, the first adhesive, the second adhesive, and the discrete absorbent cores between the top sheet web and the back sheet web to define an absorbent insert web, wherein the first elastic member web and the second elastic member web are positioned in an elongated condition and a first portion of the first elastic member web and a first portion of the second elastic member web are positioned in contact with the first adhesive and the second adhesive in the hold zones and wherein a second portion of the first elastic member web and a second portion of the second elastic member web are positioned in contact with the first adhesive but not the second adhesive in the release zones,
severing the first elastic member web and the second elastic member web in the release zones to define first and second discrete elastic members,
retracting the second portions of the first elastic member and the second elastic member through the first adhesive in the release zones and maintaining the elongation of the first portions of the first elastic member and the second elastic member in the hold zones.

### Claim 2 (depends on 1)

The method of claim 1 further comprising applying the first elongated elastic member web and the second elongated elastic member web in elastic patterns having curved portions separated by straight portions.

### Claim 3 (depends on 2)

The method of claim 2 wherein the absorbent cores define a width having a narrowed portion and wherein the curved portions of the elastic patterns align with the narrowed portion of the absorbent cores.

### Claim 4 (depends on 2)

The method of claim 2 further comprising aligning the curved portions of the elastic patterns with the hold zones and aligning the straight portions of the elastic patterns with the release zones.

### Claim 5 (depends on 4)

The method of claim 4 wherein the elastic member web defines a width in the cross-machine direction and the second adhesive application defines a second adhesive application width defined in the cross machine direction and wherein the adhesive application width is at least twice the elastic member web width.

### Claim 6 (depends on 1)

The method of claim 1 wherein the first adhesive is a construction adhesive comprising poly alpha olefin and the second adhesive is an elastic adhesive comprising a styrenic block copolymer.

### Claim 7 (depends on 6)

The method of claim 6 wherein the second adhesive overlays the first adhesive in the hold zones once assembled in the absorbent insert web.

### Claim 8 (depends on 6)

The method of claim 6 further comprising applying the first adhesive in a slot coat application at an add-on of 1 to 3 gsm and applying the second adhesive in a swirl pattern at an add-on of 8 to 12 gsm.

### Claim 9 (depends on 8)

The method of claim 8 wherein applying the first adhesive further comprises applying a slot coat pattern having a plurality of voids extending in a machine direction, each void having a width of 0.75 to 1.25 mm.

### Claim 10 (depends on 1)

The method of claim 1 wherein the first elongated elastic member web and the second elongated elastic member web are each applied in an elastic pattern having a portion that is at least partially overlaid by the discrete absorbent cores once assembled in the absorbent insert web.

### Claim 11 (depends on 10)

The method of claim 10 further comprising severing and retracting the first elongated elastic member web and the second elongated elastic member web such that the portion that is at least partially overlaid by the absorbent core is untensioned.

### Claim 12 (depends on 1)

The method of claim 1 further comprising, supplying a first body panel web and a second body panel web, separating the absorbent insert web at lines of weakness located between the discrete absorbent cores to define discrete absorbent inserts, attaching the discrete absorbent inserts to the first body panel web and the second body panel web to define a composite garment web, folding the composite garment web, attaching the first body panel web to the second body panel web along a series of garment side seam bonds, and cutting the composite garment web at the garment side seam bonds to create a plurality of pant-like disposable absorbent garments.
