EP0055033A1 - Asbestfreies Papier - Google Patents

Asbestfreies Papier Download PDF

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Publication number
EP0055033A1
EP0055033A1 EP81305598A EP81305598A EP0055033A1 EP 0055033 A1 EP0055033 A1 EP 0055033A1 EP 81305598 A EP81305598 A EP 81305598A EP 81305598 A EP81305598 A EP 81305598A EP 0055033 A1 EP0055033 A1 EP 0055033A1
Authority
EP
European Patent Office
Prior art keywords
fibres
sheet material
slurry
flexible sheet
layer
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Withdrawn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
EP81305598A
Other languages
English (en)
French (fr)
Inventor
Robert Allan Lancaster
Noel Christopher Mckenzie
Brian Hargreaves
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.)
T&N Materials Research Ltd
Original Assignee
T&N Materials Research 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 T&N Materials Research Ltd filed Critical T&N Materials Research Ltd
Publication of EP0055033A1 publication Critical patent/EP0055033A1/de
Withdrawn legal-status Critical Current

Links

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
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
    • 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
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/44—Flakes, e.g. mica, vermiculite
    • 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
    • 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
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays

Definitions

  • This invention provides non-asbestos alternatives to asbestos papers.
  • Asbestos papers contain asbestos fibres as the predominant raw material, these fibres being bound together with small amounts of hydrolysed starch, acrylic resin, or polyvinyl acetate to provide the necessary strength and flexibility.
  • Such papers find use for a variety of purposes, e.g. as high temperature flexible insulation in electrical equipment. They are commonly made in the form of flexible sheet of thickness 0.1-1.5 mm. on conventional paper-making machines such as the Fourdrinier. In the process an aqueous slurry of the ingredients which are to compose the product is progressively dewatered as a layer on a water-permeable conveyor (usually of wire mesh), the dewatered layer being subsequently compressed and dried.
  • a water-permeable conveyor usually of wire mesh
  • the present invention provides non-asbestos flexible sheet material which has flexibility and toughness such that it is specially suited to conversion to corrugated form, suitable for use as thermally insulating material for pipes, domestic hot water boilers and the like.
  • non-asbestos flexible sheet material of thickness 0.1-1.5 mm. comprises a matrix of unfired ball clay which is reinforced by organic web-forming fibres and by either
  • Ball clay provides a flexible cohesive matrix.
  • Ball clay is a fine-grained, highly plastic, mainly kaolinitic sedimentary clay.
  • 'kaolinitic' and 'kaolinite' are mineralogical ones, indicating chemical composition and chemical structure; they are not to be confused with the term 'kaolin', used to denote a highly refractory clay which approaches the mineral kaolinite in chemical composition and structure but which - by contrast with ball clay - is hardly plastic at all.
  • Various types of ball clay have varying proportions of kaolinite, micaceous material, and quartz, with small amounts of organic matter and other minerals.
  • Ball clays are used mainly in the manufacture of pottery and refractories, in admixture with other clays (such as the kaolin mentioned earlier) to impart plasticity to them and to increase the green strength of the unfired ware.
  • the function of the organic web-forming fibres is primarily to enable the paper to be formed on conventional paper-making machinery, but additionally those fibres impart strength to the ball clay matrix of the finished paper, just as do the vitreous fibres derived from wool-form material or the non-fibrous charged-layer-silicate mineral (the primary reinforcement).
  • the organic web-forming fibres are preferably cellulose. fibres, but may alternatively be polyethylene or polypropylene fibres of the kind commercally available under the name PULPEX. In the preparation of the aqueous slurry to be dewatered, the web-forming fibres are employed at a freeness of 60-90° Schopper-Riegler.
  • vitreous fibres derived from wool-form material provide the primary reinforcement
  • the material may be mineral wool or glass wool. If glass wool is used, it is preferably employed in a form which has been treated with a silane coupling agent (e.g. gamma-aminopropyl triethoxysilane).
  • a silane coupling agent e.g. gamma-aminopropyl triethoxysilane.
  • the wool-form vitreous fibre material employed has fibres which are predominantly in the range 0.25-5mm in length.
  • the particles should be capable of passing a sieve of aperture 250 um.
  • the non-fibrous charged-layer-silicate mineral employed is preferably a mica or a chlorite.
  • the chlorites have structures containing infinite two-dimensional ions of opposite electrical charge, the negatively charged layers having compositions ranging from [Mg 3 (AlSi 3 O 10 )(OH) 2 ]- to [Mg 2 Al(Al 2 Si 2 O 10 )(OH) 2 ]-, the positively charged layers having the composition [Mg 2 Al(OH) 6] +.
  • Such non-fibrous charged-layer-silicate minerals are to be distinguished from non-fibrous layer silicate minerals such as kaolinite, talc and pyrophyllite, where the infinite 2-dimensional layers (e.g. A1 2 (OH) 4 Si 2 O 5 in kaolinite) are uncharged.
  • the binder employed consists essentially of a synthetic resin, said resin being of the acrylic or polyvinyl acetate variety.
  • Suitable acrylic resins are available in the form of synthetic polymeric latices consisting of a fine suspension in water of a copolymer based on an acrylic ester as the principal monomer.
  • Suitable polyvinyl acetate resins are also available as synthetic resin emulsions consisting of a fine suspension in water of a polymer based on vinyl acetate.
  • the paper may also contain a small proportion, suitably in the range of 1-10% of rayon fibres, to impart green strength to the sheet material between the dewatering and drying operations, and also to impart additional strength to the finished paper.
  • the density of the paper will ordinarily be within the range 700-1100 kg/m 3 , its tensile strength at least 3 MPa and its burst strength at least 40 KPa.
  • the paper can be corrugated in a corrugating machine of standard construction, and withstands very well the stresses imposed by passage between the corrugating rollers of the machine.
  • the stock (slurry) of A above was made into flexible sheet material is an entirely conventional way on a Fourdrinier flat wire paper machine, such as is described in chapters 10 and 11 of "Paper and Board Manufacture” by Julius Grant, James H. young, and Barry G. Watson (Publishers: Technical Division, the British Paper and Board Industry Frederation, London 1978).
  • the slurry is progressively dewatered as it travels on the water-permeable conveyor of the machine, and the dewatered material is consolidated by pressing between rollers, and then dried to low moisture content (suitably 2% by weight).
  • the finished paper can at once or .later be submitted to a corrugating process as described, for example, in Chapter 24 (page 262ff) of "Paper - Its Merchanting and Usage", Editor S. Carter Gilmour (publ. The National Association of Paper Merchants, with Longmans, Green & Co.).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
EP81305598A 1980-12-19 1981-11-26 Asbestfreies Papier Withdrawn EP0055033A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8040810 1980-12-19
GB8040810 1980-12-19

Publications (1)

Publication Number Publication Date
EP0055033A1 true EP0055033A1 (de) 1982-06-30

Family

ID=10518120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81305598A Withdrawn EP0055033A1 (de) 1980-12-19 1981-11-26 Asbestfreies Papier

Country Status (3)

Country Link
EP (1) EP0055033A1 (de)
JP (1) JPS57128299A (de)
ZA (1) ZA818291B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109209A3 (en) * 1982-11-12 1984-06-27 T&N Materials Research Limited Flexible sheet material
FR2545115A1 (fr) * 1983-04-27 1984-11-02 T & N Materials Res Ltd Feuille flexible sans amiante et joint constitue d'une telle feuille
FR2610954A1 (fr) * 1987-02-17 1988-08-19 Armstrong World Ind Inc Materiau de structure a base de silicate et de polymere, resistant a l'eau, et son procede de fabrication

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59187697A (ja) * 1983-04-01 1984-10-24 株式会社クラレ 紙用内添剤
JPH04135453U (ja) * 1991-06-10 1992-12-16 積水化成品工業株式会社 インスツルメントパネル等の集合包装用支持材および集合包装体
JP6430377B2 (ja) 2013-05-30 2018-11-28 京セラ株式会社 ユニット、電子機器及び電子機器の製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031043A (en) * 1978-06-20 1980-04-16 Turner & Newall Ltd Fibrous Sheet Material
WO1980001576A1 (en) * 1979-02-05 1980-08-07 Hollingsworth & Vose Co Sheet material containing exfoliated vermiculite
EP0027705A1 (de) * 1979-10-19 1981-04-29 Turner & Newall Plc Durch Stärke gebundenes nicht-asbesthaltiges Papier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031043A (en) * 1978-06-20 1980-04-16 Turner & Newall Ltd Fibrous Sheet Material
WO1980001576A1 (en) * 1979-02-05 1980-08-07 Hollingsworth & Vose Co Sheet material containing exfoliated vermiculite
EP0027705A1 (de) * 1979-10-19 1981-04-29 Turner & Newall Plc Durch Stärke gebundenes nicht-asbesthaltiges Papier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109209A3 (en) * 1982-11-12 1984-06-27 T&N Materials Research Limited Flexible sheet material
FR2545115A1 (fr) * 1983-04-27 1984-11-02 T & N Materials Res Ltd Feuille flexible sans amiante et joint constitue d'une telle feuille
FR2610954A1 (fr) * 1987-02-17 1988-08-19 Armstrong World Ind Inc Materiau de structure a base de silicate et de polymere, resistant a l'eau, et son procede de fabrication
BE1001197A3 (fr) * 1987-02-17 1989-08-16 Armstrong World Ind Inc Materiau de structure a base de silicate et de polymere, resistant a l'eau, et son procede de fabrication.

Also Published As

Publication number Publication date
JPS57128299A (en) 1982-08-09
ZA818291B (en) 1982-11-24

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

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

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

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18D Application deemed to be withdrawn

Effective date: 19830606

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MCKENZIE, NOEL CHRISTOPHER

Inventor name: LANCASTER, ROBERT ALLAN

Inventor name: HARGREAVES, BRIAN