Wire treatment for dust control

Patent metadata

Field	Value
Publication number	US-2025027275-A1
Application number	US-202418778835-A
Country	US
Kind code	A1
Filing date	Jul 19, 2024
Priority date	Jul 21, 2023
Publication date	Jan 23, 2025
Grant date	—

Abstract

Methods and compositions for improving a papermaking process are provided herein. The compositions include, for example, an oil, an emulsifying surfactant, and a formulation aid. The methods may include adding an effective amount of the composition to a foraminous surface and contacting the foraminous surface with a furnish. Water may be drained through the foraminous surface, thus forming a sheet on the foraminous surface, which may be transferred to a felt, a belt, a fabric, or elsewhere.

First claim

What is claimed is:

1 . A method of improving a papermaking process, comprising:
adding an effective amount of a composition to a foraminous surface, wherein the composition comprises an oil, an emulsifying surfactant, and a formulation aid; contacting the foraminous surface with a furnish comprising water and pulp; draining the water through the foraminous surface; forming a sheet comprising the pulp on the foraminous surface; and conveying the sheet.

2 . The method of claim 1 , further comprising conveying the sheet to a fabric, a felt, a belt, a dryer, or any combination thereof.

3 . The method of claim 1 , further comprising adding the composition through a chemical shower.

4 . The method of claim 1 , further comprising adding the composition before the sheet is formed or conveyed.

5 . The method of claim 1 , further comprising adding the composition in a forming zone of a papermaking machine.

6 . The method of claim 1 , further comprising adding the composition to a side of the foraminous surface that contacts the sheet.

7 . The method of claim 1 , further comprising adding the composition when the sheet has a moisture content from about 80 wt. % to about 99.9 wt. %.

8 . The method of claim 2 , further comprising transferring the dried sheet to a creping process and/or a converting process, and further comprising reducing dust generation during the creping process and/or the converting process.

9 . The method of claim 1 , wherein the composition comprises from about 50 wt. % to about 95 wt. % of the oil.

10 . The method of claim 1 , wherein the emulsifying surfactant is an ethoxylated alcohol.

11 . The method of claim 10 , wherein the ethoxylated alcohol comprises a C 10 -C 16 ethoxylated alcohol.

12 . The method of claim 1 , wherein the composition comprises from about 1 wt. % to about 25 wt. % of the emulsifying surfactant.

13 . The method of claim 1 , wherein the formulation aid is selected from the group consisting of a fatty acid, a fatty alcohol, a fatty ether, a fatty ester, a triglyceride, a lipophilic surfactant, and any combination thereof.

14 . The method of claim 1 , wherein the acid is tall oil fatty acid.

15 . The method of claim 1 , wherein the composition comprises from about 1 wt. % to about 20 wt. % of the formulation aid.

16 . The method of claim 1 , wherein the effective amount is between about 1 and about 60 mg/m 2 .

17 . The method of claim 1 , wherein the foraminous surface comprises a forming fabric.

18 . The method of claim 1 , wherein the sheet comprises a natural fiber, a synthetic fiber, a chemical pulp, a mechanical pulp, a vegetable fiber, a recycled fiber, a filler, or any combination thereof.

19 . The method of claim 1 , wherein the composition is not added after conveying the sheet.

20 . The method of claim 1 , wherein the composition is not added after the sheet comprises about 20% consistency.

Assignees

• Ecolab Usa Inc

Inventors

• Luneau Dominic
• Furman Jr Gary Samuel
• Beattie Gareth

Classifications

• D21H23/24

  during paper manufacture · CPC title

• D21H21/24

  Surfactants · CPC title

• D21H17/06

  Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals · CPC title

• D21H23/04 Primary

  Addition to the pulp; After-treatment of added substances in the pulp · CPC title

• D21F1/32

  Washing wire-cloths or felts · CPC title