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US 4,381,639 AGranted
Sheath-core yarn for severe thermal protecting fabrics and method therefor
AssigneeRecord Industrial Company
InventorRobert R. Kress
Life of this patent
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Abstract
A sheath-core yarn and methods of preparing it are disclosed. A sheath of aramid fibers surrounds a continuous filament core composed of an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material. The yarn is useful in woven or knitted safety garments which must provide protection under such severe conditions as splattering molten steel.
Claims4
A yarn comprising a sheath spun from a roirng of aramid fibers surrounding a continuous filament core of an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material.
Dependencies are inferred from the claim text.