Fire retardant compositions and methods and apparatuses for making the same
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United States of America Patent
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Feb 21, 2012
Grant Date -
May 15, 2008
app pub date -
May 16, 2007
filing date -
Nov 16, 2005
priority date (Note) -
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Abstract
A method and apparatus for forming yarn provides a feeding component that feeds one or more ribbons of tow starting material, a drafting component that includes at least two pairs of rollers through which the feed materials pass and which stretch-breaks the starting material into a cohesive elongated network of fibers formed from the filaments of the tow material. The stretch-broken intermediate product may be a blended cohesive network formed form multiple feed materials. The intermediate product may be spun directly into yarn in one winding/twisting operation or it may be combined with other simultaneously produced intermediate products. Various yarns may be used as produced or otherwise combined to form various fabrics and other materials used in fire-retardant and heat resistant products. The starting materials may be PAN, para- and meta-aramid fibers, viscose rayon, and stainless steel and other suitable materials.
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