Cellulosic product forming process and wet formed cellulosic product

Patent metadata

Field	Value
Publication number	US-9365977-B2
Application number	US-201514608969-A
Country	US
Kind code	B2
Filing date	Jan 29, 2015
Priority date	Sep 1, 2009
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

According to the disclosure, a wet form cellulosic product forming process and a wet formed cellulosic product are disclosed. The process includes providing a slurry, forming the slurry into a cellulosic product, dewatering the cellulosic product, and drying the cellulosic product. Further dewatering of the cellulosic product occurs through a non-mechanical mechanism.

First claim

What is claimed is:

1. A wet form cellulosic product forming process comprising:
providing a slurry comprising:
cellulosic fibers comprising recycled wood pulp that are treated with butylamine and ammonia,
water, and
a surfactant consisting essentially of a cationic surfactant having a C12 to C18 carbon chain;

forming the slurry into a cellulosic product;
dewatering the cellulosic product, wherein the dewatering comprises a non-mechanical mechanism provided by the cationic surfactant; and
drying the cellulosic product;
wherein the surfactant is present in an amount ranging from 0.1 wt. % to 1 wt. %, based on the weight of the cellulosic fibers.

2. The process of claim 1 , wherein the dewatering the cellulosic product further comprises pressing the cellulosic product.

3. The process of claim 1 , wherein the drying comprises passing the cellulosic product over heated rolls.

4. The process of claim 1 , wherein the surfactant is present in an amount ranging from about 0.3 wt. % to about 1 wt. % based on the weight of the cellulosic fiber.

5. A wet form cellulosic product forming process, the process comprising:
a) providing a slurry comprising:
recycled wood fibers treated with butylamine and ammonia;
water; and
a cationic surfactant;

b) forming a cellulosic product from the slurry;
c) dewatering the cellulosic product by a non-mechanical mechanism provided by the cationic surfactant; and
d) drying the cellulosic product,
wherein the cationic surfactant is present in the amount ranging from about 0.3 wt. % to about 1 wt. %, based on the weight of the recycled wood fibers.

6. The process of claim 5 , wherein the cationic surfactant comprises a C12 to C18 carbon chain.

7. The process of claim 5 , wherein the dewatering of step c) further comprises a mechanical mechanism that includes pressing the cellulosic product.

Assignees

• Awi Licensing Co
• Awi Licensing Llc

Inventors

• Beaupre James J
• Neivandt David J
• Kehrer Kenneth P

Classifications

• D21H21/14

  characterised by function or properties in or on the paper (D21H19/66, D21H27/02 take precedence) · CPC title

• D21H21/24

  Surfactants · CPC title

• D21H11/14

  Secondary fibres (working-up waste paper D21C5/02) · CPC title

• D21H17/11 Primary

  Halides · CPC title

• D21H21/10

  Retention agents or drainage improvers · CPC title