Shaping apparatus for tubular film

Details Shaping apparatus for tubular film Shaping apparatus for tubular film

1978-03-06

1980-05-27

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264565, 4253261, B29D 722

Patent

active

042048192

ABSTRACT:
Tubular films having superior mechanical properties and extremely small deviation in thickness can be produced according to a method and an apparatus in which a means of downwardly tapered hollow inverted-truncated-conical shape is placed on the top of an annular die and used as a means for stabilizing bubbles of olefinic polymer synthetic resins which are extruded from the annular die in an air-cooling inflation process with a take-up speed of about 5 m to 50 m per minute.

REFERENCES:
patent: 2987767 (1961-06-01), Berry et al.
patent: 3092874 (1963-06-01), Fallwell
patent: 3560600 (1971-02-01), Gliniecki

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