| 摘要 |
Extruded optionally pelletised compositions of olefine polymers, carbon black and drying agent suitable. G1-. contains (a) a C2H4 or C3H6 polymer or a mixed polymer of C2H4 with 5-20 wt. % vinyl acetate, (b) 3-20 wt.% of C black of size 100-270 A. (c) 0.1-3 wt.% of a metal oxide drying agent, preferably CaO. It may be extruded directly on to photographic film as a protective layer, or extruded as threads which are cut into pellets for use in packing. |
