Synthetic fiber used for fabric
AssigneeAsahi Kasei Fibers Corporation
InventorsFumiaki Ise, Shingo Mizuno
Life of this patent
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Abstract
The purpose of the present invention is to provide a synthetic fiber which is for use in fabrics having uniform fiber density, permeability and the like, is appropriate for high-density, high-speed weaving, and exhibits excellent weft insertion stability. This synthetic fiber is characterized by having: a fiber density of 200-720 dtex; an average intermediate loading modulus of more than 75 cN/dtex and less than 150 cN/dtex; and a variation coefficient of the intermediate modulus of 5% or less.
Claims12
A synthetic fiber, wherein the fineness is from 200 to 720 dtex, the average value of the middle load modulus is from more than 75 cN/dtex to less than 150 cN/dtex, and the variation coefficient of said middle load modulus is 5% or less,
- wherein said middle load modulus is represented by the formula:
- R=F/(L′/L×d)
- wherein F is the load (cN) at the maximum point C at the tangential angle observed substantially in the middle between the original point and the breaking load in a load-elongation curve as shown in FIG. 5, L is the sample length before elongation, L′ is the length (T-H) between the intersection H of the perpendicular line drawn from the point C with the elongation axis and the intersection T of the tangent line with the elongation axis, and d is the fineness (dtex), and
- wherein said variation coefficient CV of said middle load modulus is represented by the formula:
- CV(%)=(s/X)×100
- wherein s is the standard deviation, and X is the average value,
- wherein the average value and variation coefficient of the middle load modulus are obtained by arbitrarily sampling 50 samples in the fiber length direction of the fiber,
- wherein said synthetic fiber has a shrinkage in boiling water of 5.5% or more, and
- wherein said synthetic fiber has a tensile strength of 8.5 cN/dtex or more.
Dependencies are inferred from the claim text.