Cotton
(Spun Yarn) |
Nylon
(Multi-filament) |
Polyester
(Multi-filament) |
Polypropylene
(Multi-filament) |
Polypropylene
(Monofilament) |
|
Breaking Tenacity (Grams per Denier)
|
3 to 5 gpd | 5.9 to 9.5 gpd | 6.0 to 9.5 gpd | 2.5 to 8.0 gpd | 3.5 to 7.0 gpd |
Stretch Elongation at Break Point (%)
|
3% to 7% | 15% to 28% | 12% to 14% | 20% to 100% | 14% to 30% |
Elastic Recovery (%)
|
74% at 2% 45% at 5% | 99% at 2% 89% at 3% | 99% at 2% 88% at 5% | 98% at 5% 95% at 10% | 98% at 5% |
Specific Gravity
|
1.54 | 1.14 | 1.38 | 0.91 (Floats) | 0.91 (Floats) |
Moisture Absorbency
|
Good resistance | Excellent resistance | Excellent resistance | Good resistance | Good resistance |
Abrasion Resistance
|
Good resistance | Excellent resistance | Excellent resistance | Good resistance | Good resistance |
Effect of Heat
|
Decomposes 302° | Yellows at 300° Melts at 482° | Melts at 482° | 59% tensile at 200° Melts at 320° | 50% tensile at 200° Melts at 330° |
Effects of Age
|
Negligible | None | None | Negligible | Negligible |
Effects of Sunlight
|
Loses strength | Loses strength after prolonged exposure | Loses strength after prolonged exposure | Good resistance to indirect sunlight | Good resistance if uv-stabilized |
Effects of Acids
|
Disintegrates in concentrated solutions | Good resistance Dissolves in sulfuric acids | Good resistance Dissolves in sulfuric acids | Good resistance except with oxidizing agents | Good resistance except with oxidizing agents |
Effects of Alkalis
|
Swelling, but no damage | Inert | Moderate | Good resistance | Good resistance |
Effects of Organic Solutions
|
Resistant to common solvents | Resistant. Soluble in phenolic and formic acid | Resistant. Soluble in phenolic acid | Insoluble in most except chlorinated hydrocarbons | Insoluble in most except chlorinated hydrocarbons |
Resistance to Moths
|
Not attacked | Not attacked | Not attacked | Not attacked | Not attacked |
Resistance to Mildew
|
Poor unless bleached | Not attacked | Not attacked | Not attacked | Not attacked |
Identification
|
Melts before burning. Burns rapidly | Melts before burning. Forms hard bead. Celery odor | Floats. Forms hard bead. Pungent odor | Melts before burning. Burning asphalt odor | Floats. Melts before burning. Burning asphalt odor |