Flame resistant fabrics
AssigneeSouthern Mills, Inc.
InventorsRobert Self, Keith Edward Pickering
Life of this patent
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Abstract
Flame resistant fabrics formed with fiber blends that provide the requisite flame and thermal protection but that have improved durability. In some embodiments this is accomplished with the use of fiber blends that include relatively large percentages of FR nylon fibers in combination with cellulosic and inherently flame resistant fibers.
Claims20
A flame resistant fabric formed by first yarns and a second yarns and having a fabric fiber blend, wherein the fabric has a first side and a second side opposite the first side and wherein:
- i. the first yarns comprise a first yarn fiber blend comprising approximately 5-20 wt. % aramid fibers, 5-20 wt. % modacrylic fibers, 30-50 wt. % cellulosic fibers, and 30-50 wt. % FR nylon fibers;
- ii. the second yarns comprise a second yarn fiber blend comprising 5-20 wt. % aramid fibers, 5-20 wt. % cellulosic fibers, 30-50 wt. % modacrylic fibers, and 30-50 wt. % FR nylon fibers;
- iii. the first yarns are predominantly exposed on the first side of the fabric;
- iv. the second yarns are predominantly exposed on the second side of the fabric;
- v. the fabric has a char length of 6 inches or less and an afterflame of 2 seconds or less when tested pursuant to ASTM D6413 (2015);
- and
- vi. the fabric has a fabric weight that is between 5 to 9 ounces per square yard, inclusive.
A flame resistant fabric formed by first yarns and a second yarns and having a fabric fiber blend, wherein the fabric has a first side and a second side opposite the first side and wherein:
- i. the first yarns comprise a first yarn fiber blend;
- ii. the second yarns comprise a second yarn fiber blend that is different from the first yarn fiber blend;
- iii. the fabric fiber blend comprises cellulosic fibers, aramid fibers, modacrylic fibers, and 30-50 wt. % FR nylon fibers;
- iv. the first yarns are predominantly exposed on the first side of the fabric;
- v. the second yarns are predominantly exposed on the second side of the fabric;
- vi. the fabric has a char length of 6 inches or less and an afterflame of 2 seconds or less when tested pursuant to ASTM D6413 (2015);
- vii. the fabric has a fabric weight between 5 to 7 ounces per square yard, inclusive;
- viii. the fabric has a break strength of at least 150 pounds force in a warp direction of the fabric and of at least 100 pounds force in a fill direction of the fabric;
- ix. the fabric has a tear strength of at least 8 pounds force in at least one of the warp direction or fill direction of the fabric;
- and
- x. the fabric achieves a predicted burn injury percentage of 30% or less after 4 seconds, when tested pursuant to ASTM F1930 (2018).
Dependencies are inferred from the claim text.