Meta Aramid Sewing Thread
Available Winding Type
Meta Aramid Thread – Premium 1313 Meta Aramid Sewing Thread for Flame Retardant & High-Temperature Applications
Meta Aramid Thread, also known as 1313 Meta Aramid thread (or meta-aramid sewing thread), is a high-performance sewing thread engineered for applications where flame resistance and thermal protection are critical. Made from 100% meta-aramid fiber (PMIA, poly-m-phenylene isophthalamide), this 1313 aramid sewing thread delivers inherent flame retardancy that is molecularly built into the fiber structure – it cannot be washed out, worn off, or diminished over time. Whether you search for “meta aramid thread” or “1313 meta aramid thread,” you are looking for the same premium flame-retardant sewing solution trusted by professionals in firefighting gear, protective clothing, military combat suits, and high-temperature industrial textiles.
What Makes 1313 Meta Aramid Thread Exceptional?
Inherent Flame Retardancy: 1313 Meta Aramid thread has a limiting oxygen index (LOI) greater than 28% – well above the 21% oxygen concentration in air. This means the fiber will not sustain combustion in air, does not melt or drip, and is self-extinguishing when removed from the flame source. The flame resistance is inherent to the molecular structure and lasts the lifetime of the thread.
Superior Heat Resistance: Continuous use temperature up to 220°C, with short-term exposure tolerance up to 370°C (700°F). The thread shows minimal thermal shrinkage – approximately 1% at 250°C – maintaining dimensional stability in high-temperature environments. Decomposition begins above 370°C, with carbonization starting around 400°C.
Excellent Electrical Insulation: Meta-aramid thread provides outstanding dielectric strength. The material achieves H-grade insulation rating and is widely used in motor slot insulation, transformer insulation, and cable wrapping tape.
- Chemical & Corrosion Resistance: The chemical structure of aramid 1313 is highly stable, resisting corrosion from most high-concentration inorganic acids, alkalis, hydrolysis, and steam corrosion.
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Main Features
- Extremely high LOI
- Comfort to wear
- Thermal protection
- Anti-static
Color:
Original color and dyed
Specifications:
20s/2 20s/3 30s/2 30s/3etc
Tube type:
Loose tube (170mm, 230mm), paper tube
Usage:
Sewing, Quilting
Material:
aramid fiber
Package:
cardboard box, other
Customization:
Specifications and packaging can be customized
Color:
Original color and dyed
Specifications:
20s/2 20s/3 30s/2 30s/3etc
Tube type:
Loose tube (170mm, 230mm), paper tube
Usage:
Sewing, Quilting
Material:
aramid fiber
Package:
cardboard box, other
Customization:
Specifications and packaging can be customized
Available Winding Type
Applications of Meta Aramid Thread
1313 Meta Aramid thread is the preferred choice for safety-critical sewing applications where heat and flame protection are paramount:
Thermal protective clothing (PPE): The stitching of the insulation lining and waterproof breathable layer of the firefighter’s firefighting suit.Arc protection clothing, high-temperature resistant workwear for metallurgical, glass, and ceramic factories.
High temperature filtration and industrial dust removal: This is the largest application market for aramid sewing thread. Used for sewing high-temperature flue gas dust removal filter bags for cement plants, steel plants, and coal-fired power plants.
Aerospace and Transportation: Aircraft seat covers, train car interiors, racing suits, etc
Comparative data of meta aramid 1313 and para aramid 1414
Feature
Meta Aramid 1313
Para Aramid 1414
Flame Retardancy
Inherent – permanent
Inherent – permanent
Melting Behavior
Does not melt
Does not melt – decomposes at ~560°C
Tensile Strength
Moderate
5–6× steel
Cut Resistance
Moderate
Excellent
Heat Resistance
~220°C
Up to 260°C continuous
Elongation
Higher
Very low (~3.5%)
Primary Strength
Thermal insulation
Strength + flame protection
T.D.S.
SIZE
(S for Count)
TEX
(No.)
20s/2
60
16660
1080
20s/3
90
11100
1620
30s/2
40
25000
720
30s/3
60
16660
1080
40s/2
30
33000
540
40s/3
45
22200
810
Table
Construction：1313 Meta Aramid Thread
Size：20s/2
TEX：60
Yield：16660
Average Strength：1080
Size：20s/3
TEX：90
Yield：11100
Average Strength：1620
Size：30s/2
TEX：40
Yield：25000
Average Strength：720
Size：30s/3
TEX：60
Yield：16660
Average Strength：1080
Size：40s/2
TEX：30
Yield：33000
Average Strength：540
Size：40s/3
TEX：45
Yield：22200
Average Strength：810
Frequently Asked Questions About 1313 Meta Aramid Thread
H2: Frequently Asked Questions About 1313 Meta Aramid Thread
Q: Is Meta Aramid Thread the same as 1313 Aramid Thread?
A: Yes. Meta Aramid Thread and 1313 Aramid Thread refer to the same product. The “1313” designation refers to the meta-position (1,3-) of the amide bonds on the benzene ring in the polymer structure. Both terms are used interchangeably in the industry. This material is also known by the brand name Nomex® (DuPont).
Q: What temperature can 1313 meta aramid thread withstand?
A: 1313 Meta Aramid thread can be used continuously at temperatures up to 220°C, with short-term exposure tolerance up to 370°C (700°F). It begins to decompose above 370°C and carbonizes around 400°C, but does not melt or produce dripping.
Q: Is the flame resistance of meta-aramid thread permanent?
A: Yes. Unlike chemically treated FR cotton or polyester, the flame retardancy of meta-aramid is inherent – it is built into the molecular structure of the fiber. It cannot be washed out, worn off, or diminished over time.
Q: What are the main applications of 1313 meta aramid sewing thread?
A: Primary applications include firefighting suits, industrial protective clothing (welding, electrical utility), military combat uniforms, high-temperature filter bags, electrical insulation, thermal insulation blankets, and automotive/aerospace applications.
Q: What standards does meta-aramid sewing thread meet?
A: Meta-aramid sewing threads meet rigorous international standards including NFPA 1971 (structural firefighting gear), EN ISO 11612 (protection against heat and flame), EN ISO 11611 (welding and allied processes), EN ISO 14116 (limited flame spread materials), and ASTM F1506 (flame resistant and arc rated protective clothing).
