Synthetic polymer fibres 02
Synthetic polymer fibres 02
Typical properties of selected fibres
| Polypropylene | Meta-Aramid | Para-Aramid | Vinyl Chloride/ Vinyl Acetate |
|
| Specific Gravity (g cm-3) |
0.91—0.94 | 1.38 | 1.44 | 1.40 |
| Tenacity (cN/dtex) — Dry — Wet |
3.8—5.0 — |
4.4—4.5 2.6—3.6 |
15.8—20.3 — |
5.5—7.0 — |
| Tensile Strength (Mpa) |
240—410 | — | 2750 | — |
| Elongation at break (%) |
15—25 | — | 4 | 40—60 |
| Shrinkage at: 150°Ca (%) 100°Cb (%) 70°Cc (%) |
— 5—10b — |
— — — |
0.2a — — |
— — 30—40c |
| Melting point (°C) |
160—170 | does not melt but pyrolyses >300 |
does not melt but pyrolyses >300 |
softens at >75 |
| Absorbency (%) | <0.1 | <12 | <4.5 | 5 |
| Limiting Oxygen Index |
— | 0.29 | — | — |
| Heat Resistance (°C) |
<130 | <250 | <250 | <50 |
| Flammability | moderate—low | flame resistant | flame resistant | flame resistant |
| Acid Resistance | good | moderate —good |
moderate —good |
moderate —good |
| Alkali Resistance | good | good | good | good |
| Resistance to Organic Solvents |
good | good | good | good for hydrocarbons |
| Resistance to Oxidising Agents |
good | good | good | — |
| Biological Resistance |
excellent | good | excellent | good |
| Abrasion Resistance |
good | good | good | good |
| Resistance to Sunlight |
limited (needs stabilisation) |
limited | limited | good |
| Dye Affinity | limited | limited | limited | moderate |