Method for fibrillating stretched film
Abstract
Abstract THE PRESENT DISCLOSURE IS DIRECTED TO A METHOD AND APPRATUS FOR MANUFACTURING SPLIT-FIBERS FROM A UNIAZIALLY ORIENTED FILM OBTAINED FROM A FIBER-FORMING POLYMER WHICH COMPRISES SLIDE-RUBBING AT LEAST ONE SIDE OF THE ORIENTED FILM IN THE OIENTED DIRECTION UNDER AN EFFECTIVE LONGITUDINAL TENSION ON AT LEAST ONE ROUGH SURFACE ROTATING AT A PERIPHERAL SPEED DIFFERENT FROM THAT OF THE RUNNING SPEED OF H FILM AND HAVING MANY TINY AND RIGID PROJECTIONS THEREON, SAID FILM CONTACTING, IN SUCCESSION, A PLURALITY OF SAID RIGID PROJECTIONS WHICH DO NOT PIERCE THE FILM, THEREBY FIBRILLATING THE FILM INTO MANY FIBRILS AT A RESULT OF THE SHEARING STRESS BETWEEN FILM PORTIONS PASSING ALONG THE PROJECTED PORTIONS OF THE ROTATING ROUGH SURFACE AND THOSE PORTIONS PASSING ALONG THE RECESSED PORTIONS OF THE ROTATING SURFACE.
Inventors
- 👤 M Yazawa
Bibliographic Details
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