Springs Industries, Inc.

William G Martin

Terry G Montgomery

The corespun yarn is formed on a friction spinning apparatus and comprises three components, including a core of high temperature resistant fibers, a core wrapper of low temperature resistant fibers surrounding and covering the core, and an outer sheath of low temperature resistant fibers surrounding and covering the core wrapper and the core. The high temperature resistant fibers of the core are selected from the group consisting essentially of aramid fibers (Kevlar and Nomex), and polybenzimidazole fibers (PBI). The low temperature resistant fibers of the core wrapper and the outer sheath are either natural or synthetic fibers, such a cotton and polyester. The corespun yarn is knitted or woven into a fabric and subjected to a high temperature flame environment, the low temperature resistant fibers of the core wrapper and the outer sheath are charred but do not melt, drip or exhibit afterflame or afterglow, and the charred portion remains in position around the core and maintains the same type of flexibility and integrity as the unburned fabric.

Method of forming a corespun yarn for fire resistant safety apparel

The corespun yarn is formed on a friction spinning apparatus and comprises three components, including a core of high temperature resistant fibers, a core wrapper of low temperature resistant fibers surrounding and covering the core, and an outer sheath of low temperature resistant fibers surrounding and covering the core wrapper and the core. The high temperature resistant fibers of the core are selected from the group consisting essentially of aramid fibers (Kevlar and Nomex), and polybenzimidazole fibers (PBI). The low temperature resistant fibers of the core wrapper and the outer sheath are either natural or synthetic fibers, such a cotton and polyester. The corespun yarn is knitted or woven into a fabric and subjected to a high temperature flame environment, the low temperature resistant fibers of the core wrapper and the outer sheath are charred but do not melt, drip or exhibit afterflame or afterglow, and the charred portion remains in position around the core and maintains the same type of flexiblity and integrity as the unburned fabric.

Corespun yarn for fire resistant safety apparel

The present friction spinning apparatus includes a draw frame section with an entrance trumpet including first and second fiber sliver guiding passageways for forming a three component corespun yarn. One of the guiding passageways directs a core roving into the draw frame section while the other sliver guiding passageway directs a core wrapper sliver into the draw frame section so that the core wrapper fibers surround the core fibers. Wrapping fibers are then wound about the core and core wrapper fibers in an elongated throat extending between a pair of rotating suction drums.

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Fort Mill, SC, United States of America

William G Martin