Composite fiber
AssigneeToray Industries, Inc.
InventorsMasato Masuda, Joji Funakoshi, Akira Kishiro
Life of this patent
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Abstract
The fiber cross-section of an island-in-a-sea composite fiber perpendicular to the fiber axis, the island component and sea component are arranged such that the sea component surrounds the island components. The composite cross-section is very consistent, and the fiber has excellent post-processibility. The island-in-a-sea composite fiber wherein diameter of the island component is 10 to 1000 nm, variation of the island component diameter is 1.0 to 20.0%, modification ratio is 1.00 to 1.10, and variation of the modification ratio is 1.0 to 10.0%.
Claims7
An island-in-a-sea composite fiber having a sea/island ratio of 10/90 to 30/70 in a mass ratio, wherein:
- a melt viscosity ratio of an island component polymer to a sea component polymer is 1.7 to 7.5,
- number of island components is of from 2,000 to 10,000,
- diameter of an island component is 10 to 1000 nm,
- variation of island component diameter is 1.0 to 7.0%,
- modification ratio is 1.00 to 1.10,
- variation of the modification ratio is 1.0 to 10.0%,
- variation of a diameter of the sea component surrounded by three adjacent island components in the island-in-sea composite cross section is 1.0 to 20.0%,
- ratio of a sea component diameter to an island component diameter is 0.01 to 1.00, and straight lines each connecting centers of two adjacent island components in a set of four adjacent island components are in parallel relation with each other.
Dependencies are inferred from the claim text.