High-speed spun-bond production of non-woven fabrics
AssigneeAlbany International Corp.
InventorsMark J. Levine, David Graham, Bill Houfek, Thomas L. Israel
Life of this patent
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Abstract
In combination with a high-speed spun-bond apparatus, rather than using a circulating sieve belt for collecting the stretched filaments and forming the web, a fabric having a 4-shed double layer with support shute weave design is used. This fabric is commonly referred to as a 4B weave and 4B weave with stuffer in center. In general, the fabric has a permeability ranging from 400 to 800 cfm with a woven or pin seam where the seam permeability and caliper varies only slightly with respect to the rest of the fabric.
Claims39
A fabric on which a spun-bond web is produced, said fabric being woven such that air flow through said fabric is prevented in a direction substantially perpendicular to the surface plane of said fabric.
A method for forming a fabric on which a spun-bond web is produced, comprising the step of weaving said fabric such that air flow through said fabric is prevented in a direction substantially perpendicular to the surface plane of said fabric.
A fabric on which a spun-bond web is produced, formed by weaving said fabric such that air flow through said fabric is prevented in a direction substantially perpendicular to the surface plane of said fabric.
Dependencies are inferred from the claim text.