EP0116414A1 - Matériaux sous forme de feuilles semblables au papier - Google Patents

Matériaux sous forme de feuilles semblables au papier Download PDF

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Publication number
EP0116414A1
EP0116414A1 EP84300295A EP84300295A EP0116414A1 EP 0116414 A1 EP0116414 A1 EP 0116414A1 EP 84300295 A EP84300295 A EP 84300295A EP 84300295 A EP84300295 A EP 84300295A EP 0116414 A1 EP0116414 A1 EP 0116414A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
thermally formable
paperlike
paperlike sheet
formable
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.)
Withdrawn
Application number
EP84300295A
Other languages
German (de)
English (en)
Inventor
Bruce Reynolds Inglis
Quentin Miles Drew
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.)
Wiggins Teape Group Ltd
Original Assignee
Wiggins Teape Group Ltd
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 Wiggins Teape Group Ltd filed Critical Wiggins Teape Group Ltd
Publication of EP0116414A1 publication Critical patent/EP0116414A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/35—Polyalkenes, e.g. polystyrene
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for

Definitions

  • the invention is concerned with thin membranous sheet materials which can be formed into nonplanar configurations under the influence of heat whilst maintaining a low but finite permeability to air. It is also sometimes desirable that such materials should also have paperlike matt surface characteristics facilitating adhesion when using conventional adhesives.
  • the invention is additionally concerned with such membranous sheet material, which when adhered to another surface, or perhaps to itself in overlapping relation, is required to not significantly affect the apparent smoothness of the surfaces at the zone of overlap.
  • Such sheet material finds particular application for use as wrappers or in forming sealed closures for containers having convoluted surfaces and which hold materials required to "breathe” without being generally exposed to ambient conditions.
  • Freshly ground coffee for example, exhibits this characteristic.
  • the capacity of the sheet to accept thermal deformation assists in configuring the closure to the container or the wrapper whilst maintaining the desired permeability.
  • the adhesives conventionally used in the packaging industry can be used to secure the closure or wrapper.
  • the material can also be used as a moisture resistant air filtration element which is odour free, in contradistinction to conventional elements made of cellulosic paper, which are necessarily impregnated with resins such as melamine or urea formaldehyde to achieve wet strength.
  • the invention provides a thermally formable paperlike sheet material comprising at least 25% synthetic thermoplastic material, a substantial proportion of which is fibrillated, with at least a substantial proportion of the balance to 100% being of cellulosic fibres, said sheet having a thickness of less than 140 microns and being treated to exhibit a minimum tensile strength along a first axis of 12 Newtons, and along a second axis at right angles to the first axis of 8 Newtons, per 25 millimetres of width transverse to the respective axis, and a permeability to air of less than 100,000 cubic centimetres per minute through an area of 10 square centimetres and at a pressure of 10 centimetres water gauge.
  • the foregoing tensile strength may be achieved by heat and/or pressure consolidation or by coating with a binder or a film forming material-such as polyvinyl alcohol or polyvinyl acetate, or by a combination of such consolidation and coating.
  • the thickness of the sheet material of the invention By limiting the thickness of the sheet material of the invention to 140 microns it can be adhered to another surface, or perhaps to itself, in overlapping relationship without substantially affecting the apparent smoothness at the zone of overlap.
  • the content of synthetic thermoplastic material is at least 30%. Pigments or fillers may also be included if required.
  • the invention provides a method of making a paperlike sheet as above defined, using an aqueous dispersion of solid material comprising at least 25% synthetic thermoplastic material, a substantial proportion of which is fibrillated with at least a substantial proportion of the balance to 100% being of cellulosic fibres, which dispersion is formed into a web, pressed and dried and then treated so as to confer thereon the thickness tensile strength and permeability as above defined.
  • the heating of the web is preferably effected by infra-red heating.
  • Such treatment may comprise consolidation by heat and/or pressure coating with a binder or a film forming material such as polyvinyl alcohol or polyvinyl acetate, or a combination of such consolidation and coating.
  • the sheet material comprises from 50% to 95% synthetic thermoplastic material. Still more preferably the sheet material comprises 75% synthetic thermoplastic material, at least 80% of which is fibrillated.
  • the synthetic thermoplastic material may, for example, be consti- tued by a polyolefin such as polyethylene or polypropylene. Synthetic thermoplastic particulate material may be included to supplement the fibrillated material.
  • the cellulosic fibres may for example be of bleached softwood sulphate or sulphite or cotton linters. Loadings of papermaking additives such as titanium dioxide or calcium carbonate may also be included.
  • Heat consolidation provides an effective method of reducing the permeability of the sheet material of the invention without significantly affecting its paper like character.
  • material containing fibrillated material of lower melting points such as polyethylene, permeability can be reduced substantially to zero by heat consolidation alone.
  • pressure consolidation may be used, pressure being applied for example by means of a paper machine calender, to achieve the same result.
  • a material 1 which slowly generates a gas as a by-product is held in a container 2.
  • the container 2 is formed with apertured lugs 3 which facilitate handling, but which confer a convoluted outer configuration on the container.
  • the container 2 is sealed by a closure 4 of material according to the invention.
  • the closure 4 is heat moulded so as to envelop the upper edge 5 of the container and the lugs 3 to provide an effective seal.
  • Conventional adhesives such as polyvinyl acetate can be used to adhere the closure to the container at the peripheral portion 6 of the closure.
  • closure is effective to seal the contents 1 from exposure to ambient conditions whilst permitting the slow release of any gas generated as indicated by the arrows 7.
  • each Example relates to a sheet material which has been made by dispersing the specified furnish in water, forming, pressing and drying a fibrous web derived from the furnish on a Fourdrinier paper machine and subjecting the dried web to infra-red heating to effect consolidation.
  • the sheet was additionally surface coated with polyvinyl acetate.
  • each Example relates to a sheet material made in the same manner as the sheets of Examples 1 to 6, except for the heat consolidation step.
  • consolidation was affected by passing the sheet twice through a paper machine calender.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
EP84300295A 1983-01-26 1984-01-18 Matériaux sous forme de feuilles semblables au papier Withdrawn EP0116414A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838302166A GB8302166D0 (en) 1983-01-26 1983-01-26 Paperlike sheet materials
GB8302166 1983-01-26

Publications (1)

Publication Number Publication Date
EP0116414A1 true EP0116414A1 (fr) 1984-08-22

Family

ID=10536992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84300295A Withdrawn EP0116414A1 (fr) 1983-01-26 1984-01-18 Matériaux sous forme de feuilles semblables au papier

Country Status (8)

Country Link
EP (1) EP0116414A1 (fr)
JP (1) JPS59163500A (fr)
AU (1) AU2362184A (fr)
BR (1) BR8400283A (fr)
ES (1) ES8506369A1 (fr)
FI (1) FI840271A7 (fr)
GB (1) GB8302166D0 (fr)
ZA (1) ZA84331B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015014823A1 (de) 2015-09-05 2017-03-09 Svd-Verpackungen Gmbh Kompostierbare Papiere und papierähnliche Materialien und ihre Verwendung
DE102016004570B3 (de) * 2016-04-19 2017-10-05 Wind Plus Sonne Gmbh Plattenwerkstoffe, Verbundwerkstoffe und Verbundmaterialien auf der Bais von separierter Gülle oder von Holz und separierter Gülle

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH99775A (de) * 1922-05-24 1923-06-16 Helvetia K A G Meister Thomi & Verfahren zur Herstellung von luft- und wasserdichtem Verpackungsmaterial.
US3029940A (en) * 1960-06-13 1962-04-17 United States Gypsum Co Packaging material and method for making same
US3298855A (en) * 1961-08-14 1967-01-17 Gulf Oil Corp Moisture-resistant wrapping paper
GB1155823A (en) * 1963-10-12 1969-06-25 Waldhof Zellstoff Fab Thermosealable Packaging Material
GB1189269A (en) * 1967-09-29 1970-04-22 Ethylene Plastique Sa Paper-Coating Compositions
FR2169197A1 (en) * 1972-01-24 1973-09-07 Crown Zellerbach Int Inc Porous sheet - impermeable to water except under pressure of polyolefine and possibly cellulose fibres
DE2358506A1 (de) * 1972-11-24 1974-06-12 Mitsubishi Paper Mills Ltd Verfahren zum herstellen von ueberzogenem papier mit grosser oberflaechenfestigkeit
DE2344367A1 (de) * 1973-09-03 1975-03-20 Schoeller Felix Jun Fa Verfahren zur herstellung eines fotografischen traegermaterials zur beschichtung mit polyolefinen
GB1453503A (en) * 1974-01-11 1976-10-27 Solvay Production of thermoformed sheets from fibres
GB1491937A (en) * 1974-03-25 1977-11-16 Montedison Spa Paper-like material
EP0011488A1 (fr) * 1978-11-17 1980-05-28 The Wiggins Teape Group Limited Papier lié par traitement thermique

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH99775A (de) * 1922-05-24 1923-06-16 Helvetia K A G Meister Thomi & Verfahren zur Herstellung von luft- und wasserdichtem Verpackungsmaterial.
US3029940A (en) * 1960-06-13 1962-04-17 United States Gypsum Co Packaging material and method for making same
US3298855A (en) * 1961-08-14 1967-01-17 Gulf Oil Corp Moisture-resistant wrapping paper
GB1155823A (en) * 1963-10-12 1969-06-25 Waldhof Zellstoff Fab Thermosealable Packaging Material
GB1189269A (en) * 1967-09-29 1970-04-22 Ethylene Plastique Sa Paper-Coating Compositions
FR2169197A1 (en) * 1972-01-24 1973-09-07 Crown Zellerbach Int Inc Porous sheet - impermeable to water except under pressure of polyolefine and possibly cellulose fibres
DE2358506A1 (de) * 1972-11-24 1974-06-12 Mitsubishi Paper Mills Ltd Verfahren zum herstellen von ueberzogenem papier mit grosser oberflaechenfestigkeit
DE2344367A1 (de) * 1973-09-03 1975-03-20 Schoeller Felix Jun Fa Verfahren zur herstellung eines fotografischen traegermaterials zur beschichtung mit polyolefinen
GB1453503A (en) * 1974-01-11 1976-10-27 Solvay Production of thermoformed sheets from fibres
GB1491937A (en) * 1974-03-25 1977-11-16 Montedison Spa Paper-like material
EP0011488A1 (fr) * 1978-11-17 1980-05-28 The Wiggins Teape Group Limited Papier lié par traitement thermique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
V. STANNETT et al.: "Permeability of plastic films and coated paper to gases and vapors", Tappi Monograph Series no. 23, 1962, Technical Association of the Pulp and Paper Industry, New York, US *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015014823A1 (de) 2015-09-05 2017-03-09 Svd-Verpackungen Gmbh Kompostierbare Papiere und papierähnliche Materialien und ihre Verwendung
DE102016004570B3 (de) * 2016-04-19 2017-10-05 Wind Plus Sonne Gmbh Plattenwerkstoffe, Verbundwerkstoffe und Verbundmaterialien auf der Bais von separierter Gülle oder von Holz und separierter Gülle
WO2017182120A1 (fr) 2016-04-19 2017-10-26 WindplusSonne GmbH Dispositifs perméables aux gaz, biocides et/ou absorbant les composants organiques volatils et/ou les polluants, et leur utilisation
US10960096B2 (en) 2016-04-19 2021-03-30 WindplusSonne GmbH Gas-permeable devices which absorb VOC and/or pollutants and/or are biocidal, and use thereof

Also Published As

Publication number Publication date
FI840271L (fi) 1984-07-27
ZA84331B (en) 1985-03-27
FI840271A0 (fi) 1984-01-23
ES529136A0 (es) 1985-07-01
FI840271A7 (fi) 1984-07-27
GB8302166D0 (en) 1983-03-02
JPS59163500A (ja) 1984-09-14
ES8506369A1 (es) 1985-07-01
AU2362184A (en) 1984-08-02
BR8400283A (pt) 1984-08-28

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19840824

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19851016

RIN1 Information on inventor provided before grant (corrected)

Inventor name: INGLIS, BRUCE REYNOLDS

Inventor name: DREW, QUENTIN MILES