Method of producing biaxially oriented sheet or film and apparat

Details Method of producing biaxially oriented sheet or film and apparat Method of producing biaxially oriented sheet or film and apparat

1982-04-21

1984-04-17

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264567, 264568, 264146, 2642105, 2642902, 264DIG65, 4253261, 4253871, 425388, 4251744, B29F 308

Patent

active

044433999

ABSTRACT:
A method of producing a biaxially oriented sheet or film, wherein molten resin is simultaneously, biaxially oriented in a direction of extruding the molten resin and in a direction perpendicular thereto, and an apparatus therefor, are disclosed. In the method of producing a biaxially oriented sheet or film, the molten resin is extruded into a tubular form in the horizontal direction, once cooled, thereafter, in heating the tubular resin prior to the biaxial orientation, the tubular resin is uniformly heated with the heating applied on the vertically lower side and the heating applied on the vertically upper side of the tubular resin being controlled separately of each other so as to prevent the ununiformity of the heating of the tubular resin in the circumferential direction thereof due to the elevation in heat caused by a thermal convection phenomenon, and then, the tubular resin is biaxially oriented.

REFERENCES:
patent: 2688773 (1954-09-01), McIntire
patent: 3248463 (1966-04-01), Wiley et al.
patent: 3288317 (1966-11-01), Wiley
patent: 3313870 (1967-04-01), Yazawa
patent: 3496258 (1970-02-01), Wiley
patent: 3865912 (1975-02-01), Rosenkranz et al.
patent: 3950459 (1976-04-01), Seefluth

Affiliated with

Also associated with

Rating

Method of producing biaxially oriented sheet or film and apparat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing biaxially oriented sheet or film and apparat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing biaxially oriented sheet or film and apparat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-94972