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UST941020I4 - In. youngpolyolefin films and methodsfor making same - Google Patents

In. youngpolyolefin films and methodsfor making same
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Publication number
UST941020I4
UST941020I4US52353074AUST941020I4US T941020 I4UST941020 I4US T941020I4US 52353074 AUS52353074 AUS 52353074AUS T941020 I4UST941020 I4US T941020I4
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weight
young
methods
making same
polyolefin films
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Publication of UST941020I4publicationCriticalpatent/UST941020I4/en
Priority to US05/750,519priorityCriticalpatent/US4132050A/en
Pendinglegal-statusCriticalCurrent

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Abstract

A HEAT SEALABLE FILM FOR USE IN PACKAGING COMPRISING A POLYOLEFIN FILM SUBSTRATE AT LEAST ONE SURFACE OF WHICH IS COATED WITH A LAYER OF A HEAT SEALABLE MATERIAL, WHEREIN THE FILM SUBSTRATE IS FORMED FROM A COMPOSITION COMPRISING A BLEND OF FROM 87.5 TO 60 PARTS BY WEIGHT OF POLYPROPYLENE AND FROM 12.5 TO 40 PARTS BY WEIGHT OF A BLOCK COPOLYMER OF ETHYLENE AND PROPYLENE, THE COPOLYMER CONTAINING FROM 0.5 TO 40% BY WEIGHT OF ETHYLENE, BASED ON THE WEIGHT OF THE COPOLYMER, AND THE BLEND CONTAINING FROM 0.2 TO 5% BY WEIGHT OF ETHYLENE, BASED ON THE WEIGHT OF THE BLEND.

Description

DEFENSIVE PUBLICATION UNITED STATES PATENT AND TRADEMARK OFFICE Published at the request ot the applicant or-owner in accordance with the Notice 0! Dec. 16, 1969. 869 (LG, 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number 0! pages 0! specification. including claims and sheets ot drawings contained in the application as originally tiled. The tiles 0! these applications are available to the public tor inspection and reproduction may be purchased for 30 cents a sheet.
Detensive Publication applications have not been examined as to the merits of alleged invention. The Patent and Trademark Odice makes no assertion as to the novelty ot the disclosed subject matter.
PUBLISHED DECEMBER 2, 1975 T94l,020 POLYOLEFIN FILMS AND METHODS FOR MAKING SAME Roger Neville Young, Chesham, England. assignor to Imperial Chemical Industry Limited, London, England Filed Nov. 13, 1974, Ser- No. 523,530 Claims priority, application Great Britain, Dec. 21, 1973,
59.338/73 Int. Cl. 1332b 27/30, 27/32 US. Cl. 428-349 1 Sheet Drawing. 21 Pages Specification u wwwwar A heat sealable film for use in packaging comprising a polyol'efin film substrate at least one surface of which is coated with a layer of a heat sealable material, wherein the film substrate is formed from a composition comprising a. blend of from 87.5 to 60 parts by weight of polypropylene and from 12.5 to 40 parts by weight of a block copolymer of ethylene and propylene, the eopolymer containing from 0.5 to 40% by weight of ethylene, based on the weight of the copolymer, and the blend containing from 0.2 to 5% by weight of ethylene, based on the weight of the blend.
uvv- 1,v 1] IJ K.- N. YOUNG POLYOLEFIN FILMS AND METHO FOR MAKING SAME Original Filed Nov 13, 1974
US055235301973-12-211974-11-13In. youngpolyolefin films and methodsfor making samePendingUST941020I4 (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
US05/750,519US4132050A (en)1973-12-211976-12-14Polyolefin films

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
GB5933873AGB1445178A (en)1973-12-211973-12-21Polyolefin films

Related Child Applications (1)

Application NumberTitlePriority DateFiling Date
US05/750,519ContinuationUS4132050A (en)1973-12-211976-12-14Polyolefin films

Publications (1)

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UST941020I4true UST941020I4 (en)1975-12-02

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ID=10483574

Family Applications (1)

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US05523530PendingUST941020I4 (en)1973-12-211974-11-13In. youngpolyolefin films and methodsfor making same

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US (1)UST941020I4 (en)
BE (1)BE823779A (en)
GB (1)GB1445178A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4125662A (en)1977-10-031978-11-14Mobil Oil CorporationPackaging film with improved heat sealability
US4132050A (en)1973-12-211979-01-02Imperial Chemical Industries LimitedPolyolefin films
US4297415A (en)1978-09-061981-10-27British Cellophane LimitedHeat-sealable polypropylene films

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
GB2166369B (en)*1984-09-181988-01-20Moplefan SpaPacking film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4132050A (en)1973-12-211979-01-02Imperial Chemical Industries LimitedPolyolefin films
US4125662A (en)1977-10-031978-11-14Mobil Oil CorporationPackaging film with improved heat sealability
US4297415A (en)1978-09-061981-10-27British Cellophane LimitedHeat-sealable polypropylene films

Also Published As

Publication numberPublication date
GB1445178A (en)1976-08-04
BE823779A (en)1975-06-23

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