# US 5,702,571 A · Soft high bulk tissue

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- Number: US 5,702,571 A
- Document ID: US5702571A
- Status: Granted
- Kind: A
- Application number: 08/648,527
- Filed: 1996-05-13
- Granted: 1997-12-30
- Earliest claimed: 1994-02-18
- Assignees: Kimberly-Clark Worldwide, Inc.
- Inventors: Richard Joseph Kamps; Janica Sue Behnke; Fung-jou Chen; Darnell Clarence Radtke
- Web page: https://patentgrep.com/patent/US5702571A

## CPC

- B31F 1/07: Embossing {, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles}({B31F1/128 takes precedence;} corrugating B31F1/20; embossing in combination with printing B41F19/02, B41M1/24; typewriters for embossing B41J3/38; stamping in combination with deforming B41K3/36)
- A47K 10/16: Paper towels; Toilet paper; Holders therefor
- D21F 11/006: {Making patterned paper}
- D21H 27/40: at least one of the sheets being non-planar, e.g. crêped (crêping or corrugating paper B31F)
- B31F 2201/072: Laser engraving
- B31F 2201/0733: Pattern
- B31F 2201/0738: Cross sectional profile of the embossments
- B31F 2201/0756: Characteristics of the incoming material, e.g. creped, embossed, corrugated
- B31F 2201/0758: Characteristics of the embossed product
- B31F 2201/0779: Control
- Y10T 428/24612: Composite web or sheet
- B31F: MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making layered products not composed wholly of paper or cardboard B32B)
- A47K: SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES
- D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Tissue sheets, such as are useful for facial or bath tissue, can be embossed with a fine scale embossing pattern to increase bulk with a minimal loss in strength. The fine scale embossing pattern contains at least about 15 discrete intermeshing embossing elements per square centimeter (100 per square inch) and can enable the tissue manufacturer to produce premium quality tissues having adequate softness, bulk and strength from conventional tissue basesheets without layering or throughdrying equipment. Depending on the starting basesheet material, tissues having a unique balance of properties can be produced, especially for conventional wet-pressed basesheets.

## Claims

### Claim 1

A two-ply tissue product comprising two wet-pressed tissue sheets, said product having a bulk of about 9 cubic centimeters per gram or greater, a specific elastic modulus of about 3 kilometers or less and a geometric mean tensile strength of about 500 grams or greater per 3 inches sample width.

### Claim 2

A soft wet-pressed tissue sheet having a bulk of about 6 cubic centimeters per gram or greater, a specific elastic modulus of about 4 kilometers or less, and a geometric mean tensile strength of about 500 grams or greater per 3 inches sample width.

### Claim 3 (depends on 2)

The tissue sheet of claim 2 having a bulk of about 7 cubic centimeters per gram or greater and a specific elastic modulus of about 3 kilometers or less.

### Claim 4 (depends on 2)

The tissue sheet of claim 2 having a bulk of about 7 cubic centimeters per gram or greater and a specific elastic modulus of about 2 kilometers or less.

### Claim 5

A soft throughdried tissue sheet having a bulk of about 9 cubic centimeters per gram or greater, a specific elastic modulus of about 3 kilometers or less and a geometric mean tensile strength of about 500 grams or greater per 3 inches sample width.

### Claim 6 (depends on 5)

The tissue sheet of claim 5 having a specific elastic modulus of about 2 kilometers or less.