IT1055976B - Multilayer thermoplastic sheets prepd. by coextrusion - of polyvinyl alcohol plastisol and pref. polyolefin partic. for blow moulding applications - Google Patents
Multilayer thermoplastic sheets prepd. by coextrusion - of polyvinyl alcohol plastisol and pref. polyolefin partic. for blow moulding applicationsInfo
- Publication number
- IT1055976B IT1055976B IT2028176A IT2028176A IT1055976B IT 1055976 B IT1055976 B IT 1055976B IT 2028176 A IT2028176 A IT 2028176A IT 2028176 A IT2028176 A IT 2028176A IT 1055976 B IT1055976 B IT 1055976B
- Authority
- IT
- Italy
- Prior art keywords
- polymer
- partic
- plastisol
- prepd
- pref
- Prior art date
Links
Landscapes
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Multilayer articles are made by moulding sheets prepd. by co-extruding >=2 different thermoplastic polymers. One polymer is a strongly hydrolysed PVA contg. water and plasticisers, and is fed to an extruder connected with a coextrusion head. The polymer is heated under pressure to form a plastisol which is then subjected to rapid decompression with opt. venting prior to being introduced into the extrusion head and while its temp. is at least equal to and pref. higher than that of the extrusion head. At least another thermoplastic polymer melt is separately fed to the extrusion head and the temps. of the polymers are adjusted before they come into contact so that the temp. of the PVA at least that of the other polymer(s). The feed rate of the polymers is so adjusted that their linear exit speed are equal or differ by is not >10%. The composite sheet is impermeable to gases, vapours and odours is resistant to water and chemical agents. The sheet is partic. useful for prodn. of bottles and containers for beverages, e.g. by blow moulding, or for forming inner pockets for containers.
Priority Applications (21)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2028176A IT1055976B (en) | 1976-02-18 | 1976-02-18 | Multilayer thermoplastic sheets prepd. by coextrusion - of polyvinyl alcohol plastisol and pref. polyolefin partic. for blow moulding applications |
NLAANVRAGE7701534,A NL189238C (en) | 1976-02-18 | 1977-02-14 | METHOD FOR MANUFACTURING A LAYERED, EXTRUDED, MULTI-LAYERED ARTICLE FROM THERMOPLASTIC MATERIAL AND SO OBTAINED ARTICLE. |
SE7701622A SE428542B (en) | 1976-02-18 | 1977-02-14 | PROCEDURE FOR MANUFACTURING TWO OR MULTILAYER PRODUCTS MANUFACTURED FROM THERMOPLASTIC MATERIAL |
DK062377A DK154615C (en) | 1976-02-18 | 1977-02-14 | PROCEDURE FOR MANUFACTURING HOLE BODIES OF TWO OR MORE LAYERS |
FR7704258A FR2341433A1 (en) | 1976-02-18 | 1977-02-15 | PROCESS FOR THE PREPARATION OF ARTICLES WITH TWO OR MORE COMBINED AND CO-EXTRUDED LAYERS, MADE OF THERMOPLASTIC MATERIAL, GAS, VAPOR AND ODOR TIGHT |
GB6290/77A GB1544780A (en) | 1976-02-18 | 1977-02-15 | Process for preparing bonded and coextruded two-or more -layer articles made of thermoplastic material |
CA271,812A CA1090971A (en) | 1976-02-18 | 1977-02-15 | Producing articles by coextruding polyvinyl alcohol and another thermoplastic material |
CH194177A CH616365A5 (en) | 1976-02-18 | 1977-02-16 | |
AT0102777A AT372903B (en) | 1976-02-18 | 1977-02-16 | METHOD FOR PRODUCING TWO OR MULTILAYERED HOLLOW BODIES |
CS771031A CS210611B2 (en) | 1976-02-18 | 1977-02-16 | Manufacturing method of two-layer or multiple-layer objects made from thermoplastic materials |
IN228/CAL/77A IN145943B (en) | 1976-02-18 | 1977-02-16 | |
SU772453393A SU871735A3 (en) | 1976-02-18 | 1977-02-17 | Lamellar article and its manufacturing method |
DE19772706882 DE2706882A1 (en) | 1976-02-18 | 1977-02-17 | PROCESS FOR THE MANUFACTURING OF GAS-, STEAM- AND ODOR-RESISTANT COMBINED AND EXTRUDED TWO-LAYER OR MULTI-LAYER ARTICLES FROM THERMOPLASTIC MATERIAL |
GR52799A GR82304B (en) | 1976-02-18 | 1977-02-17 | |
JP1665977A JPS52100561A (en) | 1976-02-18 | 1977-02-17 | Method of producing coaxial extrusion double or multiple layer article with gas* steam and odor resisting thermoplastic material |
YU00429/77A YU39184B (en) | 1976-02-18 | 1977-02-17 | Process for manufacture of two-or multilayer articles, made of a thermoplastic material impermeable to gases, vapours or odours, by means of co-extrusion of at least two different thermoplastic polyers one of which is polyvinyl alcohol |
ES456391A ES456391A1 (en) | 1976-02-18 | 1977-02-17 | Process for preparing gas-, vapor- and odor-proof coupled and coextruded multilayer articles of thermoplastic material and closed-surface bodies comprising the same |
AU22378/77A AU511816B2 (en) | 1976-02-18 | 1977-02-17 | Extruded multilayer containers |
BR7701061A BR7701061A (en) | 1976-02-18 | 1977-02-18 | PROCESS TO PREPARE ARTICLES OF DOUBLE OR MULTIPLE THERMOPLASTIC MATERIAL, WATERPROOFING FROM GASES, VAPORS AND ODORS AND CLOSED SURFACE ARTICLES |
HU77MO974A HU179544B (en) | 1976-02-18 | 1977-02-18 | Process for producing tqo- or multi-layer shapes imprenetrable for gases,vapors and odors,from thermoplasts |
US05/912,734 US4244914A (en) | 1976-02-18 | 1978-06-05 | Process for preparing gas-, vapor- and odor-proof coupled and coextruded multilayer articles of thermoplastic material and closed-surface bodies comprising the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2028176A IT1055976B (en) | 1976-02-18 | 1976-02-18 | Multilayer thermoplastic sheets prepd. by coextrusion - of polyvinyl alcohol plastisol and pref. polyolefin partic. for blow moulding applications |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1055976B true IT1055976B (en) | 1982-01-11 |
Family
ID=11165395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT2028176A IT1055976B (en) | 1976-02-18 | 1976-02-18 | Multilayer thermoplastic sheets prepd. by coextrusion - of polyvinyl alcohol plastisol and pref. polyolefin partic. for blow moulding applications |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1055976B (en) |
-
1976
- 1976-02-18 IT IT2028176A patent/IT1055976B/en active
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Legal Events
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TA | Fee payment date (situation as of event date), data collected since 19931001 |
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