Table 3 The main characteristics of the RTPF and CPPF.
Physical properties | RTPF | CPPF | RF | Other features | RTPF | CPPF | RF |
|---|---|---|---|---|---|---|---|
Specific gravity | 0.96 | 0.91 | 1.09 | Major ingredient | Polyester | Poly-propylene | Rubber |
Average length (mm) | 10.0 | 6.0 | 16.0 | Impurity | Rubber | None | None |
Average diameter (mm) | 0.03 | 0.1 | 2.0 | Â | Â | Â | Â |
Water absorption (%) |  > 0.4 |  < 0.03 |  > 1.0 |  | |||
Tensile strength (MPa) | 620 | 590 | 26.2 | Â | Â | Â | Â |
