Kevlar® Filament Threads
Kevlar® filament sewing threads engineered for high-strength, high-temperature applications. Proudly made in the USA, these threads are manufactured to meet the performance characteristics of A-A-55220, delivering consistent strength, durability, and thermal stability in demanding environments.
Kevlar® filament threads provide exceptional tensile strength, low elongation, and excellent resistance to heat and abrasion. While spun aramid threads remain an important solution, filament Kevlar® threads are required where higher strength and structural performance are required. Ideal for aerospace, protective equipment, industrial sewing, and reinforcement stitching, these threads are built for reliability in critical applications.
Supplied on standard 8 oz spools, with custom sizes and constructions available upon request. Certificate of Analysis (COA) with full lot traceability is available upon request.
About This Item
Product Details
Kevlar® Filament Threads
High-performance para-aramid sewing threads made from 100% continuous filament Kevlar®, designed for demanding applications requiring strength, durability, and consistent seam performance.
Key Product Attributes
- Fiber: 100% Kevlar® continuous filament
- Specification: Manufactured to conform to A-A-55220
- Origin: Made in the USA
- Compliance: Berry Amendment Compliant
- Construction: Continuous filament para-aramid thread
- Put-Up: Splice-free continuous length per spool
- Packaging: 400 × 425 plastic Kingspools
Performance
Performance That Matters
Kevlar® filament threads deliver outstanding tensile performance and elevated-temperature capability for demanding technical sewing applications.
Why Customers Choose Them
- High tensile strength for heavy-duty and load-bearing seams
- Low elongation for stable, consistent stitching
- Excellent thermal resistance beyond typical nylon and polyester sewing threads
- Low lint construction for cleaner sewing performance
- High abrasion resistance for demanding environments
- Long-term durability in industrial and technical applications
Kevlar® Filament Threads Technical Specifications
| PROPERTY | TEX 40 | TEX 60 | TEX 120 | TEX 450 | TEX 800 |
|---|---|---|---|---|---|
| Fiber Type | Kevlar® | Kevlar® | Kevlar® | Kevlar® | Kevlar® |
| # of Plies | 2 | 3 | 3 | 3 | 5 |
| Approximate Denier | 400 | 600 | 1200 | 4500 | 7500 |
| Min. Break Strength (lbf) |
14 lbf | 23 lbf | 45 lbf | 150 lbf | 225 lbf |
| Min. Yield (yd/lb) |
10000 | 6700 | 3350 | 900 | 550 |
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Kevlar® Physical Properties Guide
Para-Aramid fibers such as Kevlar®, offer a multitude of properties that make them an excellent choice for various applications. Their exceptional strength-to-weight ratio and high break strength provides high tensile strength and modulus, making them ideal for applications requiring robust and durable materials. Para-aramid fibers are great solution for applications where the fiber will be under constant load, taking advantage of low elongation and creep properties.
Kevlar® Resistance Guide
Para-aramid fibers, such as Kevlar®, exhibit excellent resistance to high temperatures, maintaining their mechanical properties even at elevated temperatures. This heat resistance makes them suitable for applications in thermal insulation and protective clothing. Additionally, Kevlar® fibers demonstrate good chemical resistance, enabling them to withstand exposure to acids, alkalis, and many organic solvents without significant degradation.
This fiber will degrade with prolonged UV light exposure. These fibers will brown and weaken over time. Please keep this fiber stored away in a dark room and in the UV protective bag the fiber was shipped in.
This fiber will absorb atmospheric moisture up to 5-7% in weight. This fiber should be stored in a cool, dry room with low humidity. A desiccant bag was included with this fiber to prevent regain during transit and short-term storage at your facility.
Acid: Prolonged exposure to concentrated strong acids will cause degradation
Alkali: Degrades with prolonged exposure to Sodium Hypochlorite
Organic Solvent: Moderate degradation in Carbon Tetrachloride and Ethylene Glycol
Continuous Operating Temperature Range (°C): -40 to 170
Short Term Exposure (°C): 420
Degradation Temperature (°C): 480
Product Recommendation Guide
Tex |
Application Type | Suggested Needle Size |
|---|---|---|
60 |
Light Industrial / Technical Textiles | 14 - 16 |
450 |
Heavy-Duty / Webbing / Composites | 200 - 230 |
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Suggested Applications
- Aerospace & Defense Components
- Industrial Safety Equipment
- Webbing, Straps & Load-Bearing Assemblies
- Cut-Resistant & Protective Systems
- Composite Reinforcements
- High-Temperature Technical Sewing
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