Title:
METHOD FOR BLEACHING FIBROUS MATERIAL MADE FROM ATYPICAL RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2012/136878
Kind Code:
A3
Abstract:
In a method for bleaching fibre material comprising regenerated cellulose fibre made of atypical cellulose-containing raw material, fibres are treated with a bleaching solution containing a peracid. The atypical cellulose raw material is a raw material having a high hemicellulose content and/or containing other impurities, and having a low brightness level, from which viscose is manufactured, which is bleached by a solution that contains a peracid, to achieve a high brightness level.
Inventors:
HASSI HEIKKI (FI)
SIREN SAKARI (FI)
PARTANEN TIMO (FI)
ISOHERRANEN JUHA (FI)
SIREN SAKARI (FI)
PARTANEN TIMO (FI)
ISOHERRANEN JUHA (FI)
Application Number:
PCT/FI2012/000020
Publication Date:
November 29, 2012
Filing Date:
April 10, 2012
Export Citation:
Assignee:
CARBATEC OY (FI)
HASSI HEIKKI (FI)
SIREN SAKARI (FI)
PARTANEN TIMO (FI)
ISOHERRANEN JUHA (FI)
HASSI HEIKKI (FI)
SIREN SAKARI (FI)
PARTANEN TIMO (FI)
ISOHERRANEN JUHA (FI)
International Classes:
D06L3/02; D06L4/10
Foreign References:
| EP0989224A1 | 2000-03-29 | |||
| GB926639A | 1963-05-22 | |||
| GB845063A | 1960-08-17 |
Other References:
IBARRA, D. ET AL.: "Combination of alkaline and enzymatic treatments as a process for uppgrading sisal paper-grade pulp to dissolving-grade pulp.", BIORESOURCE TECHNOLOGY, vol. 101, 2010, pages 7416 - 7423, XP027089384
Attorney, Agent or Firm:
TAMPEREEN PATENTTITOIMISTO OY (Tampere, FI)
Download PDF: