Title:
PAPER-LIKE OR CARDBOARD-LIKE RAW MATERIAL AND PROCESS FOR MAKING IT
Document Type and Number:
WIPO Patent Application WO1990005211
Kind Code:
A3
Abstract:
A paper-like or cardboard-like raw material containing inorganic fibres, particulate inorganic additives and organic binders or flocculents is characterized in that (1) the particulate inorganic additives comprise 40-80 wt. % of the dry mass of the raw material (2) the particulate inorganic additives contain (2.1) a basic filler of which at least 20 wt. % has a particle size < 2 mu m and not more than 20 wt. % has a particle size > 20 mu m and < 0.5 mu m, and (2.2) an anionic flocculating active pigment of which at least 50 wt. % has a primary particle size < 2 mu m (3.1) the organic flocculant is a cationic polymeric carbohydrate with a mean molecular weight between 100 000 and 2 000 000 and a degree of substitution between 0.01 and 0.3 and amounts to 0.5 to 6 wt. % of the dry mass of the raw material (3.2) 1000 g of basic filler may bind, with floc formation, not more than 0.1 mmol of cationic carbohydrate and 1000 g of anionic flocculating active pigment binds, with floc formation, at least 0.1 mmol of cationic carbohydrate.
Inventors:
ZEUNER MANFRED (DE)
DOBLANZKI PETER (DE)
DOBLANZKI PETER (DE)
Application Number:
PCT/EP1989/001287
Publication Date:
June 28, 1990
Filing Date:
October 28, 1989
Export Citation:
Assignee:
ZEUNER MANFRED (DE)
DOBLANZKI PETER (DE)
DOBLANZKI PETER (DE)
International Classes:
D21H13/36; D21H17/21; D21H17/28; D21H17/37; D21H17/67; D21H21/06; D21H21/18; D21H21/52; D21H23/18; D21H23/76; D21J5/00; D21J7/00; (IPC1-7): D21H13/36; D21H21/52
Foreign References:
| EP0099586A2 | 1984-02-01 | |||
| US4443262A | 1984-04-17 | |||
| GB2047297A | 1980-11-26 |
Other References:
BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 51, no. 11, Mai 1981, APPLETON US Seite 1235 t.mihara et al: "inorganic fiberboard for heat insulation"
BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 57, no. 9, März 1987, APPLETON US Seite 1351 k.noshiro et al.: "mineral fiberboard"
BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 58, no. 4, Oktober 1987, APPLETON US Seite 564 s.toyoshima et al.: "inorganic fiberboard"
BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 57, no. 9, März 1987, APPLETON US Seite 1351 k.noshiro et al.: "mineral fiberboard"
BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 58, no. 4, Oktober 1987, APPLETON US Seite 564 s.toyoshima et al.: "inorganic fiberboard"
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