IT1201093B - Anaerobic digester - Google Patents

Anaerobic digester

Info

Publication number
IT1201093B
IT1201093B IT19887/83A IT1988783A IT1201093B IT 1201093 B IT1201093 B IT 1201093B IT 19887/83 A IT19887/83 A IT 19887/83A IT 1988783 A IT1988783 A IT 1988783A IT 1201093 B IT1201093 B IT 1201093B
Authority
IT
Italy
Prior art keywords
density polyethylene
blends
temp
layer
low density
Prior art date
Application number
IT19887/83A
Other languages
Italian (it)
Other versions
IT8319887A0 (en
Inventor
Federico Mancosu
Original Assignee
Pirelli
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pirelli filed Critical Pirelli
Priority to IT19887/83A priority Critical patent/IT1201093B/en
Publication of IT8319887A0 publication Critical patent/IT8319887A0/en
Application granted granted Critical
Publication of IT1201093B publication Critical patent/IT1201093B/en

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Abstract

Polyolefin film with a mat finish comprises at least two coextruded layers; an upper mat finish layer comprising high density polyethylene, polypropylene or blends thereof and a second layer comprising low density polyethylene, linear low density polyethylene or blends thereof. The film is prepd. by coextrusion of an external layer comprising high density polyethylene, polypropylene or blends thereof and an internal layer comprising low density polyethylene, linear low density polyethylene or blends thereof. The extrusion process comprises passage of the coextruded layers from feed zone to an extruder die through temp. control zones where the external layer passing through the temp. control zones from the feed zone is heated more rapidly to a higher temp. than the corresp. internal layer in the corresp. temp. control zone
IT19887/83A 1983-03-04 1983-03-04 Anaerobic digester IT1201093B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT19887/83A IT1201093B (en) 1983-03-04 1983-03-04 Anaerobic digester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT19887/83A IT1201093B (en) 1983-03-04 1983-03-04 Anaerobic digester

Publications (2)

Publication Number Publication Date
IT8319887A0 IT8319887A0 (en) 1983-03-04
IT1201093B true IT1201093B (en) 1989-01-27

Family

ID=11162073

Family Applications (1)

Application Number Title Priority Date Filing Date
IT19887/83A IT1201093B (en) 1983-03-04 1983-03-04 Anaerobic digester

Country Status (1)

Country Link
IT (1) IT1201093B (en)

Also Published As

Publication number Publication date
IT8319887A0 (en) 1983-03-04

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