Wound yarn package and manufacturing method thereof
AssigneeUbe Exysmo Co., Ltd.
InventorSeiji Tanaka
Life of this patent
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Abstract
To provide a wound yarn package and a method for manufacturing the same in which even if sea-island type fibers are wound around a bobbin one by one by a traverse mode, cob-webbing and curling are less likely to occur, and the variation in the heat shrinkage rate between layers constituting the yarn layer is reduced. When winding sea-island type fibers with a fineness of 100 to 6400 dtex around a bobbin one by one by a traverse mode to form a yarn layer, each yarn constituting the n-th yarn layer is wound at a position 0 to x mm away from each yarn constituting the (n−1)-th yarn layer, with the yarn width of the sea-island type fiber being taken as x (mm), to fabricate a wound yarn package.
Claims3
A wound yarn package comprising
- a bobbin, and
- yarn layers comprising layers of a single yarn wound around the bobbin in a traverse mode,
- wherein each yarn constituting the n-th yarn turn, where n is an integer of 2 or more, is wound at a position 0 to 0.5 x mm away from each yarn constituting the (n−1)-th yarn turn, with the yarn width of the single yarn being taken as x mm,
- wherein the single yarn is a sea-island type fiber having a tape-shape or an elliptical cross-section, formed by integrating dozens to hundreds of melt-spun single fibers having at least two different melting points by fusion or heat welding into the single yarn including a sea component and an island component,
- wherein the sea-island type fiber has a heat shrinkage rate of 2% or less at a temperature lower by 20° C. than the melting point of the sea component, and has a fineness ranging from 100 to 6400 dtex.
A method for manufacturing a wound yarn package comprising
- a winding step for winding an n-th turn of a single yarn at a position 0 to x mm away from the single yarn constituting the (n−1)-th yarn turn, wherein n is an integer of 2 or more and a yarn width of the single yarn is 0.5 x mm,
- wherein the single yarn is a sea-island type fiber having a tape-shape or an elliptical cross-section, formed by integrating dozens to hundreds of melt-spun sea-island type fibers having at least two different melting points by fusion or heat welding into the single yarn including a sea component and an island component,
- wherein the single fiber has a heat shrinkage rate of 2% or less at a temperature lower by 20° C. than the melting point of the sea component, and has a fineness ranging from 100 to 6400 dtex.
Dependencies are inferred from the claim text.