FR2128105A1 - Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances - Google Patents

Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances

Info

Publication number
FR2128105A1
FR2128105A1 FR7107597A FR7107597A FR2128105A1 FR 2128105 A1 FR2128105 A1 FR 2128105A1 FR 7107597 A FR7107597 A FR 7107597A FR 7107597 A FR7107597 A FR 7107597A FR 2128105 A1 FR2128105 A1 FR 2128105A1
Authority
FR
France
Prior art keywords
film
ionising radiation
subjecting
absence
oxygen
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.)
Granted
Application number
FR7107597A
Other languages
French (fr)
Other versions
FR2128105B1 (en
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.)
Naphtachimie SA
Original Assignee
Naphtachimie SA
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 Naphtachimie SA filed Critical Naphtachimie SA
Priority to FR7107597A priority Critical patent/FR2128105A1/en
Priority to IT21260/72A priority patent/IT949760B/en
Priority to BE780180A priority patent/BE780180A/en
Priority to CH315572A priority patent/CH547321A/en
Publication of FR2128105A1 publication Critical patent/FR2128105A1/en
Application granted granted Critical
Publication of FR2128105B1 publication Critical patent/FR2128105B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/008—Wide strips, e.g. films, webs

Landscapes

  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Wrappers (AREA)

Abstract

The polyolefin films are produced by subjecting extruded polyolefin films to ionising radiation at a density 10 megarads. They are used for packaging foods and other products, the packages being easily opened by tearing. Irradiation is effected in the absence of considerable amounts of substances such as oxygen, which can react with polyolefins. For a film with a thickness of 10-20 mu, the density of the ionising radiation is 1-5 pref. 2-4 megarads. The film pref. has a thickness of 10-20 mu, and consists of polyethylene with a density >0.94 g/cm3.
FR7107597A 1971-03-05 1971-03-05 Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances Granted FR2128105A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7107597A FR2128105A1 (en) 1971-03-05 1971-03-05 Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances
IT21260/72A IT949760B (en) 1971-03-05 1972-03-01 EASILY TEARABLE FILMS COSTS FROM POLYOLEFINS
BE780180A BE780180A (en) 1971-03-05 1972-03-03 EASILY TEARABLE FILMS CONTAINING
CH315572A CH547321A (en) 1971-03-05 1972-03-03 PROCESS FOR TREATING POLYOLEFIN FILMS TO OBTAIN GOOD TEARING ABILITY IN ALL DIRECTIONS OF THE FILM PLAN.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7107597A FR2128105A1 (en) 1971-03-05 1971-03-05 Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances

Publications (2)

Publication Number Publication Date
FR2128105A1 true FR2128105A1 (en) 1972-10-20
FR2128105B1 FR2128105B1 (en) 1974-02-22

Family

ID=9072962

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7107597A Granted FR2128105A1 (en) 1971-03-05 1971-03-05 Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances

Country Status (4)

Country Link
BE (1) BE780180A (en)
CH (1) CH547321A (en)
FR (1) FR2128105A1 (en)
IT (1) IT949760B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145475A2 (en) * 1983-12-09 1985-06-19 National Research Development Corporation Polymer irradiation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809183A (en) * 1956-03-31 1959-02-18 Siemens Ag Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809183A (en) * 1956-03-31 1959-02-18 Siemens Ag Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145475A2 (en) * 1983-12-09 1985-06-19 National Research Development Corporation Polymer irradiation
EP0145475A3 (en) * 1983-12-09 1987-09-02 National Research Development Corporation Polymer irradiation

Also Published As

Publication number Publication date
BE780180A (en) 1972-09-04
CH547321A (en) 1974-03-29
FR2128105B1 (en) 1974-02-22
IT949760B (en) 1973-06-11

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Legal Events

Date Code Title Description
ST Notification of lapse