| 摘要 |
A new type of aromatic polyamide powder including a large number of fine coalescible paticles which have an average size of from 0.1 to 10 mu m, which include at least one aromatic amide polymer including 40 to 100 molar % of recurring m-phenylene isophthalamide units and 0 to 60 molar % of at least one other type of additional recurring aromatic amide units, for example, m-phenylene terephthalamide units, and which coalesce with each other to form porous agglomeraters having an average size of from 10 to 400 mu m and a surface area of from 1 to 20 m2 /g, and can be compression molded, optionally in mixture with a reinforcing additive, for example, aromatic polyamide fibers having a length of 3 mm or less, at a temperature of 200 DEG to 400 DEG C. under a pressure of 300 to 1000 kg/cm2 for 20 minutes to 5 hours, to produce shaped articles having excellent mechanical properties and appearance. |
