EP0811086A1 - Cellulose moulded article and method of producing same - Google Patents
Cellulose moulded article and method of producing sameInfo
- Publication number
- EP0811086A1 EP0811086A1 EP96942178A EP96942178A EP0811086A1 EP 0811086 A1 EP0811086 A1 EP 0811086A1 EP 96942178 A EP96942178 A EP 96942178A EP 96942178 A EP96942178 A EP 96942178A EP 0811086 A1 EP0811086 A1 EP 0811086A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulp
- bleached
- fibers
- chlorine
- cellulose
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/50—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs by irradiation or ozonisation
Definitions
- the invention relates to a cellulose molding, in particular a cellulose fiber, and a method for its production.
- NMMO N-Methylmorpholine-N-oxide
- Other amine oxides are e.g. in EP-A - 0 553 070.
- a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
- the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
- EP-A-0 356 419 describes an amine oxide process for the preparation of spinnable cellulose solutions which uses, among other things, a suspension of cellulose in liquid, aqueous N-methylmorpholine-N-oxide (NMMO) as the starting material.
- NMMO N-methylmorpholine-N-oxide
- This method consists in that the suspension in a thin film treatment apparatus in one stage and continuously in a malleable solution is transferred.
- the moldable solution is finally spun into filaments in a molding tool, for example a spinneret, which are passed through an air gap in which they are stretched into a precipitation bath, where the cellulose is precipitated.
- the cellulose fibers obtained are then washed.
- the raw pulp is blended with a range of bleaching agents, e.g. elemental chlorine, chlorine compounds, such as hypochlorite and chlorine dioxide, oxygen, peroxide and ozone, are implemented, the reaction being carried out with a combination of these chemicals in a specific sequence, which is referred to as the bleaching sequence.
- bleaching agents e.g. elemental chlorine, chlorine compounds, such as hypochlorite and chlorine dioxide, oxygen, peroxide and ozone
- Bleaching agents containing chlorine produce chlorinated products to varying degrees during pulp bleaching, which are difficult to degrade and for the most part end up in wastewater. These processes are therefore questionable for environmental reasons, and the use of chlorine-containing bleaches and especially elemental chlorine is being increasingly suppressed. However, the quality of the Bleaching off, since elemental chlorine has a high bleaching power.
- hypochlorite Of the chlorine compounds, chlorine dioxide bleaches better than hypochlorite, but is more expensive than the more commonly used hypochlorite.
- ECF pulp bleached with hypochlorite is referred to as ECF hypochlorite pulp.
- the so-called whiteness is a measure of the intensity of the bleaching. It is known from the viscose process that there is a relationship between the whiteness of a bleached pulp and the whiteness of the cellulose products made from this pulp in such a way that pulps with a higher whiteness can generally be processed into fibers with a likewise higher whiteness.
- the aim of the invention is to provide a process by means of which cellulosic shaped articles can be produced which, with the same initial degree of whiteness of the cellulose used and other similar procedures, have a higher degree of whiteness than cellulosic ones Shaped bodies that were made from an ECF hypochlorite pulp.
- Pulp is bleached with a bleach with which
- the bleach is not chlorine or a
- the process according to the invention can be used in particular to produce cellulose fibers with a high degree of whiteness, as well as cellulose films by the dry / wet spinning process.
- TCF pulps achieve higher fiber whiteness than ECF hypochlorite pulps with the same whiteness of the starting pulp, and that there is the positive side effect that the fibers can be produced in a particularly environmentally friendly manner in this way.
- the invention also relates to the bleaching of fibers which have been produced by the amine oxide process with chlorine-free bleaches, such as oxygen, ozone and in particular hydrogen peroxide.
- a preferred variant of the process according to the invention is characterized in that the fibers or the films produced according to the invention are bleached with a bleaching agent, with the proviso that the bleaching agent does not contain chlorine or a chlorine compound.
- N-methyl morpholine-N-oxide has proven particularly useful as the tertiary amine oxide.
- the invention also relates to cellulosic moldings, in particular cellulose fibers and films, with a high degree of whiteness, which can be produced by the process according to the invention.
- the invention further relates to the use of a pulp bleached with a bleaching agent for the production of cellulosic shaped articles by the amine oxide process, with the proviso that the bleaching agent does not contain chlorine or a chlorine compound.
- the pulp (beech sulfite pulp type) was first bleached using an alkaline, peroxide-enhanced oxygen extraction, then with ozone and finally with peroxide according to known processes.
- the individual bleaching processes are described, for example, in R.P. Singh; The Bleaching of Pulp, TAPPI Press, Atlanta, USA, and in EP-A - 0 426 652.
- the whiteness of the TCF pulp obtained which was determined in accordance with ISO 3688, was 90.6.
- the pulp had a rapid copper viscosity according to Zellcheming ZM IV / 30/62 of 19.8 Pa.s and an ⁇ content of 90.9.
- This TCF pulp was then processed in a known manner in a stirred kettle to give a spinning composition of 12% cellulose, 77% NMMO and 11% water.
- the viscosity the spinning mass was 1630 Pa.s (Temp .: 90 ° C, shear rate: 0.1 s).
- the spinning mass was spun into fibers at 120 ° C. through a spinneret with spinning holes, the diameter of which was 100 ⁇ m, in accordance with the known wet / dry spinning process (see, for example, EP-A - 0 584 318).
- the degree of whiteness of the fibers produced according to the invention was around 50.
- Oxygen extraction then bleached with hypochlorite and finally with peroxide.
- the whiteness of the ECF hypochlorite pulp obtained was 91.6 and thus practically the same as the TCF pulp produced in the example.
- a spinning mass and fibers were then produced analogously to the example above.
- the fibers produced had a CIELAB degree of whiteness of about 39. This makes it clear that the TCF pulp bleached according to the invention without any chlorine compound can be processed into fibers with a higher degree of whiteness than that of i.a. ECF pulp bleached with hypochlorite.
- the fibers produced were then bleached as described in the example above.
- the bleached fibers had a CIELAB whiteness of about 54.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Materials For Medical Uses (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Artificial Filaments (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0209995A AT402827B (en) | 1995-12-22 | 1995-12-22 | CELLULOSE MOLDED BODY AND METHOD FOR THE PRODUCTION THEREOF |
AT2099/95 | 1995-12-22 | ||
PCT/AT1996/000257 WO1997023666A1 (en) | 1995-12-22 | 1996-12-19 | Cellulose moulded article and method of producing same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0811086A1 true EP0811086A1 (en) | 1997-12-10 |
EP0811086B1 EP0811086B1 (en) | 1998-06-10 |
Family
ID=3527728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96942178A Expired - Lifetime EP0811086B1 (en) | 1995-12-22 | 1996-12-19 | Method for Producing a Cellulose moulded Article |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP0811086B1 (en) |
JP (1) | JP4326023B2 (en) |
CN (1) | CN1079848C (en) |
AT (2) | AT402827B (en) |
AU (1) | AU708427B2 (en) |
BR (1) | BR9607326A (en) |
CA (1) | CA2212995C (en) |
DE (1) | DE59600279D1 (en) |
ES (1) | ES2119576T3 (en) |
HK (1) | HK1018082A1 (en) |
MX (1) | MX9706413A (en) |
MY (1) | MY113146A (en) |
NO (1) | NO310665B1 (en) |
WO (1) | WO1997023666A1 (en) |
ZA (1) | ZA9610469B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6605350B1 (en) * | 1996-08-23 | 2003-08-12 | Weyerhaeuser Company | Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same |
DE19948401C1 (en) * | 1999-10-07 | 2001-05-03 | Alceru Schwarza Gmbh | Process for the production of cellulose moldings |
JP4645093B2 (en) * | 2003-08-13 | 2011-03-09 | 王子製紙株式会社 | Method for producing bleached pulp |
DE102004024028B4 (en) * | 2004-05-13 | 2010-04-08 | Lenzing Ag | Lyocell method and apparatus with press water return |
CN100359050C (en) * | 2004-11-16 | 2008-01-02 | 唐山三友集团化纤有限公司 | High whiteness and strength adhesive short fiber and process for making same |
CN1302160C (en) * | 2005-01-04 | 2007-02-28 | 陈建旭 | Production of fibre from plant stem |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL97796C (en) * | 1958-05-29 | |||
US4416698A (en) * | 1977-07-26 | 1983-11-22 | Akzona Incorporated | Shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent and a process for making the article |
US4246221A (en) * | 1979-03-02 | 1981-01-20 | Akzona Incorporated | Process for shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent |
AU636173B2 (en) * | 1989-10-30 | 1993-04-22 | Lenzing Aktiengesellschaft | Method for the chlorine-free bleaching of pulps |
AT395028B (en) * | 1990-02-07 | 1992-08-25 | Chemiefaser Lenzing Ag | METHOD FOR CHLORINE-FREE BLEACHING OF FIBER FIBER |
GB9103297D0 (en) * | 1991-02-15 | 1991-04-03 | Courtaulds Plc | Fibre production method |
SE9301160L (en) * | 1992-08-28 | 1994-03-01 | Sunds Defibrator Ind Ab | Process for treating process water |
-
1995
- 1995-12-22 AT AT0209995A patent/AT402827B/en not_active IP Right Cessation
-
1996
- 1996-12-10 MY MYPI96005199A patent/MY113146A/en unknown
- 1996-12-12 ZA ZA9610469A patent/ZA9610469B/en unknown
- 1996-12-19 WO PCT/AT1996/000257 patent/WO1997023666A1/en active Application Filing
- 1996-12-19 JP JP52314797A patent/JP4326023B2/en not_active Expired - Lifetime
- 1996-12-19 AT AT96942178T patent/ATE167242T1/en not_active IP Right Cessation
- 1996-12-19 AU AU11325/97A patent/AU708427B2/en not_active Ceased
- 1996-12-19 BR BR9607326A patent/BR9607326A/en not_active IP Right Cessation
- 1996-12-19 CN CN96193414A patent/CN1079848C/en not_active Expired - Lifetime
- 1996-12-19 ES ES96942178T patent/ES2119576T3/en not_active Expired - Lifetime
- 1996-12-19 CA CA002212995A patent/CA2212995C/en not_active Expired - Fee Related
- 1996-12-19 MX MX9706413A patent/MX9706413A/en unknown
- 1996-12-19 EP EP96942178A patent/EP0811086B1/en not_active Expired - Lifetime
- 1996-12-19 DE DE59600279T patent/DE59600279D1/en not_active Expired - Lifetime
-
1997
- 1997-08-13 NO NO19973720A patent/NO310665B1/en not_active IP Right Cessation
-
1998
- 1998-10-20 HK HK98111355A patent/HK1018082A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9723666A1 * |
Also Published As
Publication number | Publication date |
---|---|
MX9706413A (en) | 1997-11-29 |
DE59600279D1 (en) | 1998-07-16 |
BR9607326A (en) | 1997-12-30 |
CA2212995C (en) | 2006-09-19 |
CN1182460A (en) | 1998-05-20 |
HK1018082A1 (en) | 1999-12-10 |
JPH11501090A (en) | 1999-01-26 |
ZA9610469B (en) | 1997-06-24 |
WO1997023666A1 (en) | 1997-07-03 |
CN1079848C (en) | 2002-02-27 |
MY113146A (en) | 2001-11-30 |
ATE167242T1 (en) | 1998-06-15 |
AT402827B (en) | 1997-09-25 |
CA2212995A1 (en) | 1997-07-03 |
AU708427B2 (en) | 1999-08-05 |
NO310665B1 (en) | 2001-08-06 |
ATA209995A (en) | 1997-01-15 |
NO973720D0 (en) | 1997-08-13 |
ES2119576T3 (en) | 1998-10-01 |
EP0811086B1 (en) | 1998-06-10 |
JP4326023B2 (en) | 2009-09-02 |
NO973720L (en) | 1997-08-13 |
AU1132597A (en) | 1997-07-17 |
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