| 摘要 |
Composite film consisting of two or more polymer components was manufd. successively by extruding, drawing and heat-treating. Thus, 75-85wt% polyproplene and 25-15wt% polyester or polyamide was mixed in mixing hopper, extruded in screw-type extruder which was connected pin-type mixer. An extruded-film was drawn 1.10-4 times, heat-treated with hot steam in first drawing-roll and transported to second draw-roll with 5-20m/min transporting volocity. In second draw-rolls, a film was again drawn 14times and heat-treated at higher temp. than that of first draw-roll to give composite film.
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