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SAUNDERS THREAD SPECIFICATIONS
KEVLAR
®

KEVLAR® IS THE REGISTERED TRADEMARK FOR DuPont's family of high-temperature-resistant aramid fibers having a unique combination of toughness, extra-high strength and exceptional thermal stability. SAUNDERS THREAD manufactures both continuous multifilament and spun KEVLAR® for a variety of sewing operations. Continuous multifilament KEVLAR® is available in both soft and bonded, but only in natural yellow color. Spun KEVLARŪ is available in a range of package dyed colors. There will be strength loss when dying the Spun KEVLAR®. This should be taken into consideration when selecting the correct Tex and Yarn Size. The spun fiber is considered un-dyeable and some variation can be seen from one lot to the next.

SPUN KEVLAR® PARA-ARAMID
A-A-55195 / MIL-T-44100 TYPE I

Nominal
Tex
Plies
Final
Yards/Pound
Breaking Strength
(Pounds, Min)
Elongation
Maximum
(percent)
Minimum Maximum Initial
(Natural)
After Heat Aging
(Natural & Dyed)
39 2 11,970 13,230 6.0 1.80 6
59 3 7,980 8,820 8.5 3.00 6
78 4 5,700 6,300 12.0 3.25 6
98 5 4,560 5,040 16.0 4.75 6
118 6 3,990 4,410 19.0 5.75 6
138 7 3,420 3,780 22.0 6.50 6

FILAMENT KEVLAR® A-A-55220

Tex
Size
Appoximate
Denier
Ply Yards Per Lb.
Minimum
Breaking Strength
Minimum Pounds
40 400 2 10,000 14
60 600 3 6,700 23
80 800 4 5,000 30
120 1200 3 3,350 45
210 2000 5 2,100 64
400 4000 4 1,050 135
450 4500 3 900 150
800 7500 5 500 225

Bonded finish will average about 94% of minimum yardage.

FIBER TECHNICAL INFORMATION

KEVLAR®: A manufactured fiber in which the fiber forming substance is a long chain synthetic polyamide in which at least 85% of the amide linkages are attached directly to two aromatic rings.

EFFECTS OF HEAT: Difficult to ignite. Does not propagate flame. Does not melt. Decomposes at 900° F

EFFECTS OF BLEACHES & SOLVENTS: Should not be bleached. Excellent solvent resistance.

DYES USED: Filament KEVLAR® - producer colored only. Filament KEVLAR® cannot be dyed.

RESISTANCE TO MILDEW, AGING, SUNLIGHT, ABRASION: Excellent resistance to mildew and aging. Prolonged exposure to sunlight causes deterioration, but fibers self-screening. Good abrasion resistance.

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Updated December 1, 2010