EP0053897A1 - Biegsames stärkegebundenes Papier ohne Asbest - Google Patents

Biegsames stärkegebundenes Papier ohne Asbest Download PDF

Info

Publication number
EP0053897A1
EP0053897A1 EP81305597A EP81305597A EP0053897A1 EP 0053897 A1 EP0053897 A1 EP 0053897A1 EP 81305597 A EP81305597 A EP 81305597A EP 81305597 A EP81305597 A EP 81305597A EP 0053897 A1 EP0053897 A1 EP 0053897A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
flexible sheet
fibres
slurry
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.)
Granted
Application number
EP81305597A
Other languages
English (en)
French (fr)
Other versions
EP0053897B1 (de
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
Priority to AT81305597T priority Critical patent/ATE11311T1/de
Publication of EP0053897A1 publication Critical patent/EP0053897A1/de
Application granted granted Critical
Publication of EP0053897B1 publication Critical patent/EP0053897B1/de
Expired 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
    • 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
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/63—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 relates to starch-bound paper, and provides non-asbestos alternatives to starch-bound asbestos papers.
  • Starch-bound asbestos papers contain asbestos fibres as the predominant raw material, these fibres being bound together with small amounts of hydrolysed starch 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.
  • 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.
  • non-asbestos flexible sheet material of thickness 0.1-1.5 mm comprises a matrix of unfired ball clay which is reinforced by fine particles of a non-fibrous charged-layer-silicate mineral and by organic web-forming fibres, the whole being bound together by hydrolysed starch; said flexible sheet material being made by de-watering on a water-permeable conveyor a layer of aqueous slurry of unfired ball clay, fine particles of said silicate mineral, organic web-forming fibres and hydrolysed starch, and compressing and drying the de-watered layer; said aqueous slurry containing, by weight of solids content,
  • 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 manufacturing 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 the non-fibrous charged-layer-silicate mineral (the primary reinforcement) does.
  • the organic web-forming fibres are preferably cellulose fibres, but may alternatively be polyethylene or polypropylene fibres of the kind commercially 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.
  • the reinforcing fine particles of non-fibrous charged-layer-silicate mineral consist of particles capable of passing a sieve of aperture 250 pm.
  • the non-fibrous charged-layer-silicate mineral employed may be 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 sillicate minerals such as kaolinite, talc and pyrophyllite, where the infinite 2- dimensional layers (e.g. Al 2 (OH) 4 Si 2 O 5 in kaolinite) are uncharged.
  • the hydrolysed starch is preferably a farina starch.
  • 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 in the range 700-1100 kg/m 3 , its tensile strength at least 3 MPa and its burst strength at least 40 KPa.
  • the papers of the invention may be impregnated with other materials, such as resins, to give special properties for particular purposes. They may have surface coatings e.g. of shellac varnish or synthetic resin applied to them. They may also be given a backing e.g. of manilla paper, to increase mechanical strength, especially tensile strength, when that is required in the wrapping of conductors and the like, and they may be incorporated in double or multiple layer constructions with glass threads between adjacent paper layers to give particularly high strength, as when wrapping.cables.
  • other materials such as resins
  • They may have surface coatings e.g. of shellac varnish or synthetic resin applied to them. They may also be given a backing e.g. of manilla paper, to increase mechanical strength, especially tensile strength, when that is required in the wrapping of conductors and the like, and they may be incorporated in double or multiple layer constructions with glass threads between adjacent paper layers to give particularly high strength, as when wrapping.cables.
  • the invention is further illustrated by the following Example.
  • the stock (slurry) of A above was made into flexible sheet material in 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 Federation, 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' properties of the paper thus obtained were:-
  • a specimen of paper (50mm x 230 mm, with the 230mm side parallel to the grain) should show no evidence of breaking when bent through 180°C around a mandrel of 50mm diamter, with use of just enough force to keep the specimen in contact with the mandrel.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Cable Accessories (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Wrappers (AREA)
  • Package Frames And Binding Bands (AREA)
EP81305597A 1980-12-05 1981-11-26 Biegsames stärkegebundenes Papier ohne Asbest Expired EP0053897B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81305597T ATE11311T1 (de) 1980-12-05 1981-11-26 Biegsames staerkegebundenes papier ohne asbest.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8039121 1980-12-05
GB8039121 1980-12-05

Publications (2)

Publication Number Publication Date
EP0053897A1 true EP0053897A1 (de) 1982-06-16
EP0053897B1 EP0053897B1 (de) 1985-01-16

Family

ID=10517787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81305597A Expired EP0053897B1 (de) 1980-12-05 1981-11-26 Biegsames stärkegebundenes Papier ohne Asbest

Country Status (5)

Country Link
EP (1) EP0053897B1 (de)
JP (1) JPS57121700A (de)
AT (1) ATE11311T1 (de)
DE (1) DE3168399D1 (de)
ZA (1) ZA818290B (de)

Cited By (2)

* 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
WO1998035096A1 (de) * 1997-02-06 1998-08-13 Merck Patent Gmbh Lasermarkierbare papiere und kartonagen, verfahren zur herstellung dieser und verwendung im bereich verpackungen, wertpapiere, sicherheitspapiere und graphische erzeugnisse

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 (2)

* 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
WO1998035096A1 (de) * 1997-02-06 1998-08-13 Merck Patent Gmbh Lasermarkierbare papiere und kartonagen, verfahren zur herstellung dieser und verwendung im bereich verpackungen, wertpapiere, sicherheitspapiere und graphische erzeugnisse

Also Published As

Publication number Publication date
DE3168399D1 (de) 1985-02-28
ATE11311T1 (de) 1985-02-15
EP0053897B1 (de) 1985-01-16
ZA818290B (en) 1982-11-24
JPS57121700A (en) 1982-07-29

Similar Documents

Publication Publication Date Title
EP0027705B1 (de) Durch Stärke gebundenes nicht-asbesthaltiges Papier
EP0109209B1 (de) Biegsames Bahnmaterial
EP0112010B1 (de) Biegsames Bahnmaterial
EP0006362B1 (de) Verfahren zur Herstellung von nicht brennbaren asbestfreien Plattenprodukten
FI76394C (fi) Foerfarande foer framstaellning av poroest, mineralfibrer innehaollande papper, med foerfarandet framstaellt papper och anvaendning av det som taeckskivor foer byggnadsplattor av gips.
GB2138855A (en) Gasket paper
EP0127960A1 (de) Verfahren zur Herstellung von autoklavbehandelten faserverstärkten Formkörpern
EP0053897B1 (de) Biegsames stärkegebundenes Papier ohne Asbest
EP0047158B1 (de) Verfahren zum Herstellen faserverstärkter Formteile
EP0055033A1 (de) Asbestfreies Papier
CA1160404A (en) Calcined serpentine as inorganic charge in sheet materials
GB2088917A (en) Flexible Starch bound Non Asbestos Paper
US4180434A (en) Mica paper containing cellulose
GB2060728A (en) Paper
GB2031043A (en) Fibrous Sheet Material
EP0027706A1 (de) Durch Latex gebundenes nicht-asbesthaltiges Papier
GB2089857A (en) Non-Asbestos Paper Comprising a Matrix of Ball Clay
GB2130264A (en) Starch-bound non-asbestos paper
US4363847A (en) Flexible sheet material
GB2061344A (en) Paper
EP0094922A1 (de) Herstellung eines Faserproduktes
GB2082641A (en) Fibre-cement board
JPH085704B2 (ja) 無水石こう抄造板の製造方法
IE48578B1 (en) Process for the production of non-combustible asbestos-free board products

Legal Events

Date Code Title Description
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 DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19821213

ITF It: translation for a ep patent filed
RBV Designated contracting states (corrected)

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

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 11311

Country of ref document: AT

Date of ref document: 19850215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3168399

Country of ref document: DE

Date of ref document: 19850228

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19861128

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19861130

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19871126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19871127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19871130

BERE Be: lapsed

Owner name: T&N MATERIALS RESEARCH LTD

Effective date: 19871130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19880601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19880802

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 81305597.7

Effective date: 19880913