Process for manufacturing absorbent sanitary paper products

Patent metadata

Field	Value
Publication number	US-9267241-B2
Application number	US-201514718156-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	Jan 30, 2014
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A method of manufacturing an absorbent sanitary paper product having a machine direction, a cross-machine direction orthogonal and co-planar thereto, and a Z-direction orthogonal to both the machine- and cross-machine directions is disclosed. The method provides the steps of: providing a first and second network of fibers each having opposing first and second sides where each fiber of the first network of fibers has a longitudinal axis generally disposed within the plane comprising the machine- and cross-machine-directions; applying a first bonding layer to one of the first and second sides of the first network of fibers; applying a first and second second network of fibers to the first bonding layer; and, placing the first and second network of fibers into face-to-face contacting engagement.

First claim

What is claimed is:

1. A method of manufacturing an absorbent sanitary paper product having a machine direction, a cross-machine direction orthogonal and co-planar thereto, and a Z-direction orthogonal to both the machine- and cross-machine directions, said method comprising the steps of:
providing a first first network of fibers having opposing first and second sides, each fiber of said first first network of fibers having a longitudinal axis generally disposed within the plane comprising the machine- and cross-machine-directions;
providing a second first network of fibers having opposing first and second sides, each fiber of said second first network of fibers having a longitudinal axis generally disposed within the plane comprising the machine- and cross-machine-directions;
applying a first bonding layer in a first pattern to said first side of said first first network of fibers;
applying a second bonding layer in a second pattern to said first side of said first first network of fibers;
applying a first second network of fibers to said first bonding layer, each individual fiber comprising said second network of fibers having a longitudinal axis generally disposed in the Z-direction;
applying a second second network of fibers to said second bonding layer, each individual fiber comprising said second second network of fibers having a longitudinal axis generally disposed in the Z-direction, said first second network of fibers and said second second network of fibers being different; and,
placing said second side of said first first network of fibers and said second side of said second first network of fibers into contacting engagement.

2. The method of claim 1 further comprising the step of:
applying a third second network of fibers to said second bonding layer, each individual fiber comprising said third second network of fibers having a longitudinal axis generally disposed in the Z-direction.

3. The method of claim 1 wherein, prior to said step of placing said second side of said first first network of fibers and said second side of said second first network of fibers into contacting engagement, applying an adhesive to one of said second side of said first first network of fibers and said second side of said second first network of fibers.

4. The method of claim 1 further comprising the step of:
further processing said absorbent sanitary paper product with a process selected from the group consisting of embossing, printing, perforating, slitting, folding, winding, combinations thereof, and the like.

5. A method of manufacturing an absorbent sanitary paper product having a machine direction, a cross-machine direction orthogonal and co-planar thereto, and a Z-direction orthogonal to both the machine- and cross-machine directions, said method comprising the steps of:
providing a first first network of fibers having opposing first and second sides, each fiber of said first first network of fibers having a longitudinal axis generally disposed within the plane comprising the machine- and cross-machine-directions;
providing a second first network of fibers having opposing first and second sides, each fiber of said second first network of fibers having a longitudinal axis generally disposed within the plane comprising the machine- and cross-machine-directions;
applying a first bonding layer to said first side of said first first network of fibers;
applying a first second network of fibers to a first region of said first bonding layer, each individual fiber comprising said first second network of fibers having a longitudinal axis generally disposed in the Z-direction;
applying a second second network of fibers to a second region of said first bonding layer, each individual fiber comprising said second second network of fibers having a longitudinal axis generally disposed in the Z-direction, said first region of said bonding layer being disposed adjacent said second region of said bonding layer, said first second network of fibers and said second second network of fibers being different; and,
placing said second side of said first first network of fibers and said second side of said second first network of fibers into contacting engagement.

6. The method of claim 5 wherein said step of applying said first bonding layer to said first side of said first first network of fibers further comprises the step of:
applying said first bonding layer to said first side of said first first network of fibers in a pattern.

7. The method of claim 6 wherein said step of applying said first bonding layer to said first side of said first first network of fibers in a pattern further comprises the step of:
applying said first bonding layer in a plurality of discrete regions upon said first side of said first first network of fibers.

8. The method of claim 6 wherein said step of applying said second bonding layer to said first side of said second first network of fibers further comprises the step of:
applying said second bonding layer to said first side of said second first network of fibers in a pattern.

9. The method of claim 5 wherein, prior to said step of placing said second side of said first first network of fibers and said second side of said second first network of fibers into contacting engagement, applying an adhesive to one of said second side of said first first network of fibers and said second side of said second first network of fibers.

10. The method of claim 5 further comprising the step of:
further processing said absorbent sanitary paper product with a process selected from the group consisting of embossing, printing, perforating, slitting, folding, winding, combinations thereof, and the like.

Assignees

• Procter & Gamble

Inventors

• Byrne Thomas Timothy
• Mcneil Kevin Benson
• Kien Kathryn Christian

Classifications

• D04H1/70

  characterised by the method of forming fleeces or layers, e.g. reorientation of fibres · CPC title

• D21H27/007

  relating to absorbency, e.g. amount or rate of water absorption, optionally in combination with other parameters relating to physical or mechanical properties · CPC title

• D21H27/30

  Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) · CPC title

• D21H27/02 Primary

  Patterned paper (patterned coatings D21H19/66; embossing B31F1/07; prepared on the paper-making machines D21F11/00) · CPC title

• D04H11/00

  Non-woven pile fabrics (layered products forming non-woven pile fabrics B32B) · CPC title