| Mattress Thread Buying Guide | 
| U.S. Thread, a division of Dunlap Industries Inc., offers Twaron™ thread that meets 16 CFR Part 1633. The thread is comprised of aramid fibers which increases the effectiveness of fire resistance due to its strength at high temperatures. This strength allows the seams and tape edges to stay sealed in order to keep out flames that could possibly break the FR barrier causing the materials inside to ignite. | 
| Product Features | 
| • High Tear Strength Combined with Excellent Cut Resistance at Very Low Specific Weight • Good Permanent Heat Resistance • No Melting, No Dripping, Self-Extinguishing, Flame-Retardant • Good Abrasion Resistance, Resistance Against Most Chemicals • Good Electrical Insulation and Good Heat Isolation • Available as a Filament and Staple Fiber | 
| Product Comparison | 
Twaron™ 
Kevlar™ 
 
Heat Resistance 
800° Degradation 
800° Degradation 
 
Sewability 
Excellent 
Excellent 
 
Break Strength 
Approximately 10 lbs. 
Approximately 10 lbs. 
 
Federal Specification 
Meets F.A.R. 1632/1633 
Meets F.A.R. 1632/1633 
 
Flame Retardancy 
482° Constant Temperature 
482° Constant Temperature 
 
Washing Temperature 
141°F 
141°F 
 
| Twaron™ | Kevlar™ | |
|---|---|---|
| Heat Resistance | 800° Degradation | 800° Degradation | 
| Sewability | Excellent | Excellent | 
| Break Strength | Approximately 10 lbs. | Approximately 10 lbs. | 
| Federal Specification | Meets F.A.R. 1632/1633 | Meets F.A.R. 1632/1633 | 
| Flame Retardancy | 482° Constant Temperature | 482° Constant Temperature | 
| Washing Temperature | 141°F | 141°F | 

