Abstract: A tissue product having superior properties of softness, handfeel, and strength is disclosed. The product may show a reduced degree of sloughing, that is, a reduction in the amount of paper particles or flakes that are generated from the product upon the abrasion of the tissue product. In one embodiment, a two furnish process is employed. In some applications, both hardwood fibers and softwood fiber sources may be employed. At least one fiber furnish is fractionated or separated into short and long fiber fractions. The resulting product exhibits reasonably good strength and softness, with reduced sloughing.
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Grant
Filed:
August 2, 2002
Date of Patent:
September 23, 2003
Assignee:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Grant
Filed:
August 2, 2002
Date of Patent:
September 16, 2003
Assignee:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The present invention relates to a process of using steam to achieve simultaneous impregnation and drying of lignocellulosic material to improve the strength of lignocellulosic material and to reduce the number of serial processing steps. The steam may be either indigenously generated by way of a heated press or heated nip, or the steam may be externally applied.
Type:
Grant
Filed:
January 19, 1999
Date of Patent:
March 25, 2003
Assignee:
Paper Technology Foundation Inc.
Inventors:
Charles John Gilfert, Dimitris Ioannis Collias, Steven Michael Schennum
Abstract: The present invention relates to a process of using steam to achieve simultaneous impregnation and drying of lignocellulosic material to improve the strength of lignocellulosic material and to reduce the number of serial processing steps. The steam may be either indigenously generated by way of a heated press or heated nip, or the steam may be externally applied.
Type:
Grant
Filed:
November 12, 1998
Date of Patent:
March 25, 2003
Assignee:
Paper Technology Foundation Inc.
Inventors:
Charles John Gilfert, Dimitris Ioannis Collias, Steven Michael Schennum
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Application
Filed:
August 2, 2002
Publication date:
December 26, 2002
Applicant:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Application
Filed:
August 2, 2002
Publication date:
December 12, 2002
Applicant:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Grant
Filed:
August 6, 2001
Date of Patent:
October 1, 2002
Assignee:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Application
Filed:
August 6, 2001
Publication date:
December 13, 2001
Applicant:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Type:
Grant
Filed:
December 17, 1999
Date of Patent:
August 28, 2001
Assignee:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The strength of lignocellulosic materials is improved by treating them with water-soluble strengthening agents containing sulfonic units, and rendering these agents water-insoluble by reacting them with compounds containing epoxide rings and quaternary ammonium groups. Thus, a substantial reduction or elimination of the bleeding of said strengthening agents from the lignocellulosic materials when touched with wet hands or contacted under humid conditions is achieved.
Type:
Application
Filed:
January 31, 2001
Publication date:
June 28, 2001
Applicant:
Paper Technology Foundation Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The strength of lignocellulosic materials is improved by treating them with water-soluble strengthening agents containing sulfonic units, and rendering these agents water-insoluble by reacting them with compounds containing epoxide rings and quaternary ammonium groups. Thus, a substantial reduction or elimination of the bleeding of said strengthening agents from the lignocellulosic materials when touched with wet hands or contacted under humid conditions is achieved.
Type:
Grant
Filed:
December 9, 1999
Date of Patent:
April 3, 2001
Assignee:
Paper Technology Foundation, Inc.
Inventors:
Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Abstract: The present invention relates to partially impregnated lignocellulosic materials. When impregnated with strengthening agents, the partially impregnated materials exhibit increased overall strength while maintaining sufficient adhesive bondability of the surface opposite the impregnation surface.
Type:
Grant
Filed:
November 12, 1998
Date of Patent:
February 27, 2001
Assignee:
Paper Technology Foundation Inc.
Inventors:
Steven Michael Schennum, Dimitris Ioannis Collias, Blair Alex Owens, Andrew Julian Wnuk