DE2756497C2 - Verbundfolie - Google Patents

Verbundfolie

Info

Publication number
DE2756497C2
DE2756497C2 DE2756497A DE2756497A DE2756497C2 DE 2756497 C2 DE2756497 C2 DE 2756497C2 DE 2756497 A DE2756497 A DE 2756497A DE 2756497 A DE2756497 A DE 2756497A DE 2756497 C2 DE2756497 C2 DE 2756497C2
Authority
DE
Germany
Prior art keywords
film
composite film
melt index
polypropylene
thickness
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DE2756497A
Other languages
German (de)
English (en)
Other versions
DE2756497A1 (de
Inventor
Fosco Bordini
Luigi Terni Mauri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MOPLEFAN SpA MAILAND/MILANO IT
Original Assignee
MOPLEFAN SpA MAILAND/MILANO IT
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 MOPLEFAN SpA MAILAND/MILANO IT filed Critical MOPLEFAN SpA MAILAND/MILANO IT
Publication of DE2756497A1 publication Critical patent/DE2756497A1/de
Application granted granted Critical
Publication of DE2756497C2 publication Critical patent/DE2756497C2/de
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0092—Metallizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31511—Of epoxy ether
    • Y10T428/31515—As intermediate layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31573—Next to addition polymer of ethylenically unsaturated monomer
    • Y10T428/31587—Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31605—Next to free metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31928—Ester, halide or nitrile of addition polymer

Landscapes

  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Adhesive Tapes (AREA)
DE2756497A 1976-12-20 1977-12-19 Verbundfolie Expired DE2756497C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT30637/76A IT1067253B (it) 1976-12-20 1976-12-20 Accoppiati per imballaggio a base di pellicole poliolefiniche

Publications (2)

Publication Number Publication Date
DE2756497A1 DE2756497A1 (de) 1978-06-22
DE2756497C2 true DE2756497C2 (de) 1985-03-21

Family

ID=11230433

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2756497A Expired DE2756497C2 (de) 1976-12-20 1977-12-19 Verbundfolie

Country Status (15)

Country Link
US (1) US4211811A (enExample)
JP (1) JPS53102343A (enExample)
AT (1) AT368537B (enExample)
BE (1) BE861981A (enExample)
CA (1) CA1111752A (enExample)
CH (1) CH630290A5 (enExample)
DE (1) DE2756497C2 (enExample)
DK (1) DK152749B (enExample)
ES (1) ES465218A1 (enExample)
FR (1) FR2374161A1 (enExample)
GB (1) GB1566925A (enExample)
IT (1) IT1067253B (enExample)
NL (1) NL7713908A (enExample)
NO (1) NO149655C (enExample)
SE (1) SE443949C (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128820C2 (de) * 1991-08-30 2001-04-12 Hoechst Trespaphan Gmbh Verbundfolie mit guter Sauerstoffbarriere

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013089B1 (en) * 1978-12-29 1983-06-15 Imperial Chemical Industries Plc Laminates of cloth or other sheet material and filled crystalline polypropylenes and a method for making them
JPS6347478Y2 (enExample) * 1979-02-19 1988-12-07
IT1166680B (it) * 1979-03-09 1987-05-06 Moplefan Spa Accoppiati metallizzati comprendenti una pellicola poliolefinica ed una pellicola policrorovinilica
US4345005A (en) * 1979-06-28 1982-08-17 Mobil Oil Corporation Oriented polypropylene film substrate and method of manufacture
JPS5662942U (enExample) * 1979-10-23 1981-05-27
US4309466A (en) * 1979-12-17 1982-01-05 Champion International Corporation Flexible laminated packaging material comprising metallized intermediate layer
IT1141272B (it) 1980-04-11 1986-10-01 Moplefan Spa Accoppiati metallizzati comprendenti una pellicola poliolefinica e un foglio di carta o cartone
JPS5725953A (en) * 1980-07-22 1982-02-10 Toray Industries Multilayer laminated polypropylene film
JPS612036Y2 (enExample) * 1980-08-13 1986-01-23
US4384024A (en) * 1981-03-19 1983-05-17 Imperial Chemical Industries Limited Composite heat-sealable films
US4360551A (en) * 1981-06-19 1982-11-23 Mobil Oil Corporation Flexible film laminate especially adapted for use in the construction of a retortable food pouch
FR2508873A1 (fr) * 1981-07-06 1983-01-07 Rhone Poulenc Films Procede d'emballage de materiaux sensibles a l'oxygene et/ou a la vapeur d'eau
IT1140297B (it) * 1981-11-26 1986-09-24 Moplefan Spa Accopiati per imballaggi impermeabili ai gas,a base di pellicole poliolefiniche
JPS58187345A (ja) * 1982-04-27 1983-11-01 株式会社　麗光 包装用フイルム
JPS58187344A (ja) * 1982-04-27 1983-11-01 株式会社　麗光 包装用フイルム
JPS58212942A (ja) * 1982-05-06 1983-12-10 株式会社　麗光 包装用フイルム
JPS58193146A (ja) * 1982-05-06 1983-11-10 株式会社　麗光 電子部品包装用シ−ト
JPS5890060A (ja) * 1982-08-27 1983-05-28 株式会社麗光 電子部品包装用袋
JPS58193272A (ja) * 1982-09-20 1983-11-10 株式会社　麗光 包装用袋
JPS58193275A (ja) * 1982-09-20 1983-11-10 株式会社　麗光 包装用袋
DE3514569A1 (de) * 1985-04-23 1986-10-23 Hoechst Ag, 6230 Frankfurt Metallisierte verbundfolie aus zwei mit klebstoff verbundenen kunststoff-filmen
US4771935A (en) * 1985-07-03 1988-09-20 Continental Can Company, Inc. Plastic containers embodying a peel seal and method of preparing same
US4649090A (en) * 1986-01-22 1987-03-10 Rayovac Corporation Seal tab for a metal-air electrochemical cell
GB8605997D0 (en) * 1986-03-11 1986-04-16 Edeco Holdings Ltd Plastics films
DE3701307A1 (de) * 1987-01-17 1988-07-28 Hoechst Ag Mehrschichtfolie mit einem biaxial gestreckten polypropylenfilm
DE3709252A1 (de) * 1987-03-20 1988-09-29 Hoechst Ag Metallisierbare mehrschichtfolie, ihre herstellung und ihre verwendung
US4888237A (en) * 1988-02-16 1989-12-19 Mobil Oil Corporation Process for manufacturing a metallized polyolefin film and resulting film
US5057177A (en) * 1989-01-13 1991-10-15 Mobil Oil Corporation Laminated packaging film
US4961992A (en) * 1989-01-13 1990-10-09 Mobil Oil Corporation Laminated packaging film
GB2244283B (en) * 1990-05-24 1994-02-16 Courtaulds Films & Packaging Metaalized polypropylene films
DE4135096A1 (de) * 1991-10-24 1993-04-29 Hoechst Ag Siegelbare, matte biaxial orientierte polyolefin-mehrschichtfolie, verfahren zu ihrer herstellung und ihre verwendung
DE4135097A1 (de) * 1991-10-24 1993-04-29 Hoechst Ag Nicht siegelbare, matte, truebe biaxial orientierte polyolefin-mehrschichtfolie, verfahren zu ihrer herstellung und ihre verwendung
FR2737339B1 (fr) * 1995-07-28 1997-10-17 Bollore Technologies Condensateur a dielectrique en polypropylene et film metallise pour la realisation d'un tel condensateur
US8465469B2 (en) * 2002-09-12 2013-06-18 Medtronic Vascular, Inc. Reinforced catheter and methods of making
US7279061B2 (en) 2003-04-09 2007-10-09 Exxonmobil Oil Corporation Process for the production of improved metallized films

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Publication number Priority date Publication date Assignee Title
GB951867A (en) * 1961-08-08 1964-03-11 Hercules Powder Co Ltd Improvements in or relating to coating of polypropylene film
BE629978A (enExample) * 1962-03-26
DE1504792A1 (de) * 1964-10-01 1969-07-03 Rheinische Blattmetall Ag Verpackungsfolie
US3496061A (en) * 1966-01-28 1970-02-17 Continental Can Co Flexible packages containing nonfusible high peel strength heat seals
GB1166019A (en) * 1967-05-19 1969-10-01 Fibre Tessili Artificiali Sa Laminates
DE1805886A1 (de) * 1967-11-04 1969-09-04 Mitsubishi Petrochemical Co Heissverschweissbare biaxial orientierte Polypropylenschichtfilme und Verfahren zu deren Herstellung
DE1769028A1 (de) * 1968-03-22 1972-02-03 Kalle Ag Biaxial orientierte Polypropylenfolie
US3597237A (en) * 1968-10-28 1971-08-03 Star Stabilimento Alimentare Method for packaging food products in flexible containers
IE34174B1 (en) * 1969-06-02 1975-02-19 Ici Ltd Coated woven materials
DE1940028C3 (de) * 1969-08-06 1975-05-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Verbinden einer eine aufgedampfte Metallschicht besitzenden Kunststoffbahn mit einer zweiten Kunststoffbahn
US3764430A (en) * 1970-10-29 1973-10-09 Dow Chemical Co Method for making a metallized barrier structure or film
DE2417272A1 (de) * 1974-04-09 1975-10-23 Czerednikow Alexander Verfahren zur herstellung von reflektorfolien und vorrichtung zur durchfuehrung des verfahrens
IT1015660B (it) * 1974-07-04 1977-05-20 Moplefan Spa Accoppiati a base di pellicole poliolefiniche
US3973063A (en) * 1974-11-21 1976-08-03 Mobil Oil Corporation Spot blocked thermoplastic film laminate
US3998602A (en) * 1975-02-07 1976-12-21 Carl Horowitz Metal plating of polymeric substrates
FR2364118A1 (fr) * 1976-09-10 1978-04-07 Cellophane Sa Materiau complexe pour le thermoformage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128820C2 (de) * 1991-08-30 2001-04-12 Hoechst Trespaphan Gmbh Verbundfolie mit guter Sauerstoffbarriere

Also Published As

Publication number Publication date
NO149655B (no) 1984-02-20
GB1566925A (en) 1980-05-08
NL7713908A (nl) 1978-06-22
BE861981A (fr) 1978-06-19
FR2374161A1 (fr) 1978-07-13
CH630290A5 (it) 1982-06-15
AT368537B (de) 1982-10-25
DK559477A (da) 1978-06-21
FR2374161B1 (enExample) 1980-07-18
SE7714313L (sv) 1978-06-21
ATA901777A (de) 1982-02-15
JPS53102343A (en) 1978-09-06
DK152749B (da) 1988-05-09
US4211811A (en) 1980-07-08
IT1067253B (it) 1985-03-16
ES465218A1 (es) 1978-09-16
NO149655C (no) 1984-05-30
SE443949B (sv) 1986-03-17
NO774316L (no) 1978-06-21
DE2756497A1 (de) 1978-06-22
CA1111752A (en) 1981-11-03
SE443949C (sv) 1987-07-27

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