FR2393881A1 - HIGH TEMPERATURE REFINING WITH LOW THERMOMECHANICAL PULP CONSISTENCY - Google Patents

HIGH TEMPERATURE REFINING WITH LOW THERMOMECHANICAL PULP CONSISTENCY

Info

Publication number
FR2393881A1
FR2393881A1 FR787816202A FR7816202A FR2393881A1 FR 2393881 A1 FR2393881 A1 FR 2393881A1 FR 787816202 A FR787816202 A FR 787816202A FR 7816202 A FR7816202 A FR 7816202A FR 2393881 A1 FR2393881 A1 FR 2393881A1
Authority
FR
France
Prior art keywords
thermomechanical pulp
high temperature
refining
pulp consistency
temperature refining
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
FR787816202A
Other languages
French (fr)
Other versions
FR2393881B1 (en
Inventor
John Berard Matthew
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.)
Beloit Corp
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of FR2393881A1 publication Critical patent/FR2393881A1/en
Application granted granted Critical
Publication of FR2393881B1 publication Critical patent/FR2393881B1/fr
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/303—Double disc mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining

Landscapes

  • Paper (AREA)

Abstract

L'invention concerne un raffinage à haute température et à faible consistance de pulpe thermomécanique. Les fibres d'une pulpe thermomécanique contiennent de la lignine ramollie et sont pratiquement exemptes de résidus chimiques. On raffine une suspension de ces fibres ayant une consistance de 3 à 5 % à une température de 93 à 149 degrés C dans une raffineuse 20, 21, 22, 24, 25 fonctionnant à une intensité inférieure à 15,748 x 10**-4 cheval/millimètres de contact/minute. L'invention est utilisée pour atténuer la réduction de la longueur des fibres dans le postraffinage des pulpes mécaniques en réduisant également l'intensité appliquée.A high temperature, low consistency refining of thermomechanical pulp is provided. The fibers of a thermomechanical pulp contain softened lignin and are practically free from chemical residues. A suspension of these fibers having a consistency of 3 to 5% is refined at a temperature of 93 to 149 degrees C in a refiner 20, 21, 22, 24, 25 operating at an intensity of less than 15.748 x 10 ** - 4 horsepower / millimeters of contact / minute. The invention is used to alleviate the reduction in fiber length in post-refining of mechanical pulps by also reducing the applied intensity.

FR787816202A 1977-06-08 1978-05-31 HIGH TEMPERATURE REFINING WITH LOW THERMOMECHANICAL PULP CONSISTENCY Granted FR2393881A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80451877A 1977-06-08 1977-06-08

Publications (2)

Publication Number Publication Date
FR2393881A1 true FR2393881A1 (en) 1979-01-05
FR2393881B1 FR2393881B1 (en) 1982-09-17

Family

ID=25189165

Family Applications (1)

Application Number Title Priority Date Filing Date
FR787816202A Granted FR2393881A1 (en) 1977-06-08 1978-05-31 HIGH TEMPERATURE REFINING WITH LOW THERMOMECHANICAL PULP CONSISTENCY

Country Status (9)

Country Link
JP (1) JPS546904A (en)
BR (1) BR7802948A (en)
CA (1) CA1070536A (en)
DE (1) DE2825193C3 (en)
ES (1) ES470123A1 (en)
FI (1) FI63269C (en)
FR (1) FR2393881A1 (en)
GB (1) GB1591777A (en)
SE (1) SE7805307L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594151A1 (en) * 1986-02-11 1987-08-14 Kamyr Ab Process for reducing the energy consumption during the beating of a fibrous material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60152699U (en) * 1985-02-18 1985-10-11 ベロイト　コ−ポレ−ション Post-stage refiner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008892A (en) * 1932-03-29 1935-07-23 Defibrator Ab Method of manufacture of pulp
US2791503A (en) * 1952-05-08 1957-05-07 Champion Paper & Fibre Co Process for producing semichemical pulp
CH493691A (en) * 1968-04-02 1970-07-15 Defibrator Ab Process for the production of pulp containing lignocellulose

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008892A (en) * 1932-03-29 1935-07-23 Defibrator Ab Method of manufacture of pulp
US2791503A (en) * 1952-05-08 1957-05-07 Champion Paper & Fibre Co Process for producing semichemical pulp
CH493691A (en) * 1968-04-02 1970-07-15 Defibrator Ab Process for the production of pulp containing lignocellulose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594151A1 (en) * 1986-02-11 1987-08-14 Kamyr Ab Process for reducing the energy consumption during the beating of a fibrous material

Also Published As

Publication number Publication date
BR7802948A (en) 1979-02-28
GB1591777A (en) 1981-06-24
DE2825193A1 (en) 1978-12-21
ES470123A1 (en) 1979-10-01
DE2825193B2 (en) 1980-06-04
FI781682A (en) 1978-12-09
FI63269B (en) 1983-01-31
FR2393881B1 (en) 1982-09-17
DE2825193C3 (en) 1981-02-05
SE7805307L (en) 1978-12-09
CA1070536A (en) 1980-01-29
FI63269C (en) 1983-05-10
JPS546904A (en) 1979-01-19

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Legal Events

Date Code Title Description
ST Notification of lapse