Soft through air dried tissue

Patent metadata

Field	Value
Publication number	US-10190263-B2
Application number	US-201715614156-A
Country	US
Kind code	B2
Filing date	Jun 5, 2017
Priority date	Aug 3, 2012
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A process for manufacturing tissue including providing a first pulp mix, delivering a wet-end additive to the first pulp mix at a first point in the process, forming a tissue web comprising the first pulp mix after the first point in the process, monitoring the tissue web for breaks and preventing delivery of the wet-end additive to the first pulp mix at the first point in response to detecting a break in the monitoring step. In an exemplary embodiment, a switching valve is used to control delivery of the wet-end additive to the first pulp mix.

First claim

What is claimed is:

1. A system for making tissue, comprising:
a mixing section that provides a pulp mix, the mixing section including a wet-end adding section that delivers a wet-end additive to the pulp mix at a first point in a process for manufacturing tissue;
a forming section that forms after the first point in the process a wet web from the pulp mix provided by the mixing section;
a drying section that dries the wet web into a basesheet of tissue;
a winding section that winds the basesheet tissue onto a roll; and
a sensor that detects a break in the basesheet tissue;
wherein operation of the wet-end adding section is controlled by the sensor so that delivery of the wet-end additive to the pulp mix is prevented at the first point in response to the sensor detecting a break in the basesheet tissue.

2. The system of claim 1 , wherein the wet-end adding section comprises a switching valve that is coupled to the sensor and through which the wet-end additive is added to the pulp mix.

3. The system of claim 2 , wherein the switching valve is responsive to the sensor.

4. The system of claim 3 , wherein the switching valve is closed when the sensor detects a break in the tissue web.

5. The system of claim 1 , wherein the wet-end additive comprises a debonder.

6. The system of claim 1 , wherein the forming section comprises a three layer headbox and the pulp mix is formed into an interior layer of the wet web.

Assignees

• First Quality Tissue Llc

Inventors

• Ramaratnam Karthik
• Miller Iv Byrd Tyler
• Hayes Shane Ervin
• Sealey Ii James E

Classifications

• D21F11/145

  including a through-drying process · CPC title

• D21H27/38 Primary

  at least one of the sheets having a fibrous composition differing from that of other sheets · CPC title

• D21H11/04

  Kraft or sulfate pulp · CPC title

• D21H27/008

  characterised by inhomogeneous distribution or incomplete coverage of properties, e.g. obtained by using materials of chemical compounds (D21H23/02, D21H23/76, D21H27/02 take precedence) · CPC title

• D21H21/18

  Reinforcing agents · CPC title