Papermaking fabric, process for producing high bulk products and the products produced thereby
AssigneeAsten, Inc.
InventorsFrederick W. Ahrens, Thomas Gulya, Gary L. Worry, Walter P. Wright
Life of this patent
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Abstract
The present invention is an improved 7,3-broken twill, TAD fabric for use in the formation of a paper web. The present invention is also a process of using this fabric to produce a paper product having high bulk and absorbency. Finally, the present invention is the paper product produced in a TAD process using this fabric.
Claims18
A papermaker's fabric for forming and transporting an aqueous paper web comprising a single layer fabric having machine direction filaments interwoven with alternating smaller and larger cross direction filaments to form a pattern of knuckles and baskets, the fabric characterized by:
- each machine direction filament being woven over seven cross direction filaments, three of said seven cross direction filaments of each MD sheet side float being of the larger diameter and four of said seven cross direction filaments being of the smaller diameter, and
- the smaller diameter cross direction filaments forming central support members at the bottom of said baskets.
In combination with a papermaking through air dryer apparatus having at least one through-dryer position, a through-dryer papermaking fabric comprising:
- a single layer fabric having machine direction filaments interwoven with alternating smaller and larger cross machine filaments to form a pattern of knuckles and basket;
- the MD filaments forming sheet side floats in the MD direction that have a minimum length of seven CD system filaments, and the smaller CD filaments forming machine side floats in the CD direction that have a minimum length of four MD system filaments.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments having alternating smaller and larger filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum length of seven CD system filaments, and the smaller CD filaments forming machine side floats in the CD direction that have a minimum length of four MD system filaments whereby the weave forms a plurality of basket-like depressions in the sheet side of the fabric.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments having at least two subsets of smaller and larger filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum length of seven CD system filaments, and the smaller CD filaments weave in a repeat pattern of under four, over one MD filament whereby the weave forms a plurality of basket-like depressions in the sheet side of the fabric.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments having at least two subsets of smaller and larger filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum length of seven CD system filaments, the larger CD filaments weaving in a repeat pattern of over one, under one, over one, under two MD filaments and the smaller CD filaments forming machine side floats in the CD direction that have a minimum length of four MD system filaments whereby the weave forms a plurality of basket-like depressions in the sheet side of the fabric.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments having at least two subsets of smaller and larger filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum length of seven CD system filaments, the smaller CD filaments weave in a repeat pattern of under four MD filaments, over one MD filament and the knuckles formed by the smaller diameter CD filaments coincide with knuckles of the larger diameter CD filaments whereby the weave forms a plurality of basket-like depressions in the sheet side of the fabric.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum float of seven CD system filaments;
- the CD filaments having at least two subsets of filaments that have larger and smaller diameter filaments;
- the larger diameter CD filaments define only knuckles on the sheet side;
- and
- the smaller diameter CD filaments define only sheet side knuckles and machine side floats;
- whereby the weave forms a plurality of depressions in the sheet side of the fabric.
A papermaking fabric having a sheet side and a machine side comprised of:
- a system of MD filaments selectively interwoven with a system of CD filaments, the MD filaments forming sheet side floats in the MD direction that have a minimum float of seven CD system filaments;
- the CD filaments having at least two subsets of filaments that have larger and smaller diameter filaments;
- the larger diameter CD filaments define only knuckles on the sheet side;
- the smaller diameter CD filaments define only sheet side knuckles and machine side floats;
- and
- the sheet side knuckles formed by the smaller diameter CD filaments coincide with the sheet side knuckles formed by the larger diameter CD filaments;
- whereby the weave forms a plurality of depressions in the sheet side of the fabric.
Dependencies are inferred from the claim text.