Multi-core composite filaments and process for producing same
AssigneeToray Industries, Inc.
InventorMiyoshi Okamoto
Life of this patent
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Abstract
Disclosed are an improved islands-in-a-sea type multi-core composite filament comprising at least two different polymer components and having a cross-section wherein each island is surrounded by some other islands and most of the islands have an approximately quadrilateral to hexagonal cross-section, and also a process for producing the above-said composite filament.
Claims10
An islands-in-a-sea type multi-core composite filament comprising at least two different polymer components and having a cross-section wherein each island is surrounded by some other islands, characterized in that the sea component is contained in an amount less than 10% based on the total weight of the polymer components, and most of the islands have an approximately quadrilateral to hexagonal cross-section, the cross-sections of the islands positioned at the most outside portion of said filament being of approximately quadrilateral or pentagonal shape and the cross-sections of the inner islands surrounded by said outside islands being of approximately quadrilateral to nonagonal shape.
A process for producing an islands-in-a-sea type multi-core composite filament comprising forming a composite stream consisting of at least two different polymers, wherein a multiplicity of island component streams composed of one or more of the polymers are distributed in a sea component stream of the other polymer, so that said island component streams are arranged on two or more concentric circles, with a content of said island component of no less than 90% based on the total weight of the polymers, and ejecting said composite stream from a spinning orifice.
Dependencies are inferred from the claim text.