EP0004833B1 - Produit fibreux semblable au papier et procédé de fabrication d'un tel produit - Google Patents

Produit fibreux semblable au papier et procédé de fabrication d'un tel produit Download PDF

Info

Publication number
EP0004833B1
EP0004833B1 EP79850017A EP79850017A EP0004833B1 EP 0004833 B1 EP0004833 B1 EP 0004833B1 EP 79850017 A EP79850017 A EP 79850017A EP 79850017 A EP79850017 A EP 79850017A EP 0004833 B1 EP0004833 B1 EP 0004833B1
Authority
EP
European Patent Office
Prior art keywords
fibres
glass
water
product
fibre
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.)
Expired
Application number
EP79850017A
Other languages
German (de)
English (en)
Other versions
EP0004833A2 (fr
EP0004833A3 (en
Inventor
Ingegerd Hjort
Brodde Broddesson
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.)
Gullfiber AB
Original Assignee
Gullfiber AB
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 Gullfiber AB filed Critical Gullfiber AB
Publication of EP0004833A2 publication Critical patent/EP0004833A2/fr
Publication of EP0004833A3 publication Critical patent/EP0004833A3/xx
Application granted granted Critical
Publication of EP0004833B1 publication Critical patent/EP0004833B1/fr
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
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • 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

  • the present invention relates to a new type of fibre product, such as paper, cardboard or the like, and a method of manufacturing such product based on a suspension of treated organic and inorganic fibres.
  • inorganic fibres as glass fibre, in paper manufacturing is also familiar to the art, either alone or in combination with fibres of cellulose or other organic substance.
  • One major objective of the invention is the manufacture of fibrous products having good wet strength and low porosity through the combination of water-glass - perhaps modified by the addition of some conventional binding-agent, organic or inorganic - inorganic fibres, such as fibres of mineral wool, and organic fibres, e.g. cellulose fibres.
  • organic and inorganic fibres with a binding-agent improves both web strength and porosity properties, which the use of cullulose fibres alone will not permit.
  • Fibre products made according to the method of the invention also display excellent water-repelling properties. If a high percentage of mineral wool is added, first- rate fire-retarding qualities are achieved along with excellent thermal stability.
  • Fibre products manufactured according to the method of the invention are produced from a suspension of treated cellulose fibres to which is added a binding-agent of water-glass. Finally, mineral wool fibres, also in the suspension phase, are added to the suspension of cellulose fibres whereupon the final suspension, or stock, after undergoing further treatment, e.g. the admixture of size, dyestuff, filler and thickener, is dired and pressed to obtain the final product. Glass fibres having a diameter of approx. 7 ,um - standard fibres as used for building insulation - may be used to advantage in the new method.
  • the water-glass binder may consist of compounds of silicic acid and sodium or potassium to which carbamide and/or propylene glycol have been added. Good results have been obtained by using e.g. sodium silicate where the mole proportion between sodium oxide and silicon dioxide is 1:3.4-4.1.
  • the water-glass binding agent may, furthermore, be modified by some conventional organic or inorganic binder.
  • the cellulose pulp which may be bleached or unbleached, used in the manufacture of the product is prepared in advance so as to increase the specific surface of the fibres and allow them to make good contact during the forming of the sheet. This is carried out by conventional means, by mechanical agitation, or “beating", in pulpers, jordan refiners or similar grinding machinery. During this process the cellulose fibres are made somewhat shorter and the fibre bundles are delaminated. Birch, pine or spruce, for example, may be used for the cellulose pulp. In the new method such pulp is suspended in a separate water chest, the mineral wool fibres, from e.g. sheets, slabs or flocs of mineral wool, being suspended in another.
  • rejects or waste materal may be used to advantage.
  • the water-glass binding-agent is then added to the chest containing the cellulose pulp, after which the contents of the two chest are mixed.
  • the mixture so obtained, the stock may then be treated by conventional means, by e.g. the admixture of size, dyestuff, filler and thickener, before continuing to the drying and pressing stages.
  • Glass fibres and water are mixed in a pulper for 5 minutes to obtain a suspension or slurry, the amount of glass fibre contained being ten percent by weight of the whole.
  • slurries of cellulose fibres usually contain approx. 3-3.5 percent cellulose by weight, thus entailing a fairly high water content when the product is removed to the wire for dewatering.
  • a pulp containing a certain amount of glass fibres dries out much faster in the paper machine than does a pure cellulose pulp, and this has economic advantages, for the manufacturing process can thereby be speeded up.
  • the glass fibre slurry is removed to a stock chest.
  • a three percent cellulose fibre slurry of bleached birch is prepared in another stock chest. To this is added 5% sodium silicate binder calculated on the total amount of glass fibre and cellulose slurry, having a ratio of 3.4 and containing carbamide and propylene glycol.
  • the purpose of this binding-agent of water. glass is, on the one hand, to reduce the wettability of the fibres, i.e. to make them more resistant to water, on the other to reduce their pore radius, that is to fill in the pores in the sheet, thereby reducing pore diameter and hindering the penetration of liquids.
  • the glass fibre slurry is then added and mixed with the slurry of cellulose fibres and water-glass, the amount of glass fibres contained in the whole being ten percent by weight.
  • This mixture of cellulose fibres, glass fibres and water-glass binder is alkaline, i.e. its pH value is between 9.0 and 9.5.
  • the pH value of cellulose fibres is usually 4.5 at this stage. No hydrophobic agent or alum is added to the slurry, nor is the temperature raised as in conventional manufacturing methods.
  • the slurry mixture so obtained is then passed through a conical refiner and out onto a wire via the head box of a paper machine as in conventional methods.
  • a fibre product manufactured by the method described above has several advantages, above all in that its tearing resistance and printability, for e.g. process printing, are excellent, a result of good dimensional stability between the fibres.
  • the quality of the product is also well-suited to packaging purposes since deformability is good.
  • the paper obtained displayed good dielectric qualities and good resistance to wear and to impact and tensile stresses. Shrinkage and contraction were insignificant.
  • the paper made by this method proved to have high resistance to combustion and burning, had high thermal stability and was, furthermore, resistant to mould.
  • the fourth test which was also carried out in the same way as the others, included 50% mineral wool fibres, 10% water-glass binder, 5% melamine resin and 35% cellulose fibres.
  • paper types rf differing properties may be obtained by varying the proportions of mineral wool fibres, cellulose fibres and water-glass binder.
  • mineral wool fibres in the mixture - tests were made with admixtures of up to 95% by weight - paper can be made having exceptionally fine fire-retarding properties.
  • the invention is not limited only to fibrous products in the form of relatively thin sheets such as cardboard or the like, but may well be applied to products in the form of felt having a thickness of several centimeters.
  • carbamide and propylene glycol were added with the binder, but these can naturally also be added to the suspension separately.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (3)

1. Produit fibreux, semblable à du papier, du carton, etc., contenant à la fois des fibres organiques, telles que des fibres de cellulose, et des fibres minérales, telles que des fibres de laine minérale, la proportion desdites fibres minérales ne dépassant pas 95% en poids du produit fibreux, caractérisé en ce qu'il contient également un liant, au moins partiellement, sous la forme de composés de l'acide silicique et de sodium ou de potassium, c'est-à-dire, sous la forme de verre soluble, ainsi que du carbamide et du propylène glycol.
2. Procédé pour fabriquer en produit fibreux semblable à du papier, du carton, etc., contenant à la fois des fibres organiques, telles que des fibres de cellulose, et des fibres minérales, telles que des fibres de laine minérale, la proportion desdites fibres minérales ne dépassant pas 95% du poids du produit fibreux, ainsi qu'un liant, au moins partiellement, sous la forme de composés de l'acide silicique et de sodium ou de potassium, c'est-à-dire, sous la forme de verre soluble, ainsi que de carbamide et du propylène glycol, caractérisé en ce qu'on prépare un mélange alcalin en ajoutant à une suspension de fibres organiques, en plus dudit carbamide et dudit propylène glycol, aussi ledit verre soluble - dans une proportion ne dépassant pas 30% du poids de la suspension totale de fibres - ainsi que les fibres minérales, et en ce que, après avoir fait subir au mélange ou liqueur ainsi obtenu d'autres traitements, par exemple, après l'addition d'un apprêt, d'un colorant, d'une charge et d'un épaississeur, on le sèche et on le presse, d'une manière connue, pour obtenir le produit final.
3. Procédé selon la revendication 2, caractérisé en ce qu'on ajoute le verre soluble directement à la suspension de fibres de cellulose et en ce que l'on ajoute les fibres de laine minérale sous la forme d'une suspension fibreuse séparée.
EP79850017A 1978-04-05 1979-03-28 Produit fibreux semblable au papier et procédé de fabrication d'un tel produit Expired EP0004833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7803858A SE425111C (sv) 1978-04-05 1978-04-05 Fiberprodukt sasom papper, papp och dylikt och forfarande for tillverkning av densamma
SE7803858 1978-04-05

Publications (3)

Publication Number Publication Date
EP0004833A2 EP0004833A2 (fr) 1979-10-17
EP0004833A3 EP0004833A3 (en) 1979-10-31
EP0004833B1 true EP0004833B1 (fr) 1982-12-22

Family

ID=20334508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79850017A Expired EP0004833B1 (fr) 1978-04-05 1979-03-28 Produit fibreux semblable au papier et procédé de fabrication d'un tel produit

Country Status (6)

Country Link
EP (1) EP0004833B1 (fr)
DE (1) DE2964338D1 (fr)
DK (1) DK148717C (fr)
FI (1) FI62382C (fr)
NO (1) NO154402C (fr)
SE (1) SE425111C (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786670A (en) * 1987-01-09 1988-11-22 Lydall, Inc. Compressible non-asbestos high-temperature sheet material usable for gaskets
US6251224B1 (en) 1999-08-05 2001-06-26 Owens Corning Fiberglass Technology, Inc. Bicomponent mats of glass fibers and pulp fibers and their method of manufacture
US6488811B1 (en) 2001-04-30 2002-12-03 Owens Corning Fiberglas Technology, Inc. Multicomponent mats of glass fibers and natural fibers and their method of manufacture
FI9942U1 (fi) * 2011-10-10 2013-01-10 Jarmo Hukkanen Biohajoava liima

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568849A (en) * 1947-05-14 1951-09-25 Carey Philip Mfg Co Vapor barrier paper and the manufacture thereof
US2705198A (en) * 1950-04-19 1955-03-29 Hermann G Seybold Wallboard composition and method of making same
GB708019A (en) * 1950-09-22 1954-04-28 British Thomson Houston Co Ltd Improvements in and relating to electrical insulating material
US3062912A (en) * 1958-03-25 1962-11-06 British Insulated Callenders Paper for use in the manufacture of electric cables and capacitors and other purposes
NL265832A (fr) * 1960-06-13
AT317668B (de) * 1971-07-23 1974-09-10 Roehm Gmbh Verfahren zur Herstellung verschleifbarer kunstharzgefüllter Papiere

Also Published As

Publication number Publication date
FI791131A (fi) 1979-10-06
EP0004833A2 (fr) 1979-10-17
DE2964338D1 (en) 1983-01-27
SE7803858L (sv) 1979-10-06
DK148717B (da) 1985-09-09
DK139479A (da) 1979-10-06
DK148717C (da) 1988-01-18
NO154402C (no) 1988-01-05
SE425111B (sv) 1982-08-30
EP0004833A3 (en) 1979-10-31
NO154402B (no) 1986-06-02
SE425111C (sv) 1987-11-16
FI62382B (fi) 1982-08-31
FI62382C (fi) 1982-12-10
NO791101L (no) 1979-10-08

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