GB1076124A - Method of making fibreboard and the like - Google Patents

Method of making fibreboard and the like

Info

Publication number
GB1076124A
GB1076124A GB10231/65A GB1023165A GB1076124A GB 1076124 A GB1076124 A GB 1076124A GB 10231/65 A GB10231/65 A GB 10231/65A GB 1023165 A GB1023165 A GB 1023165A GB 1076124 A GB1076124 A GB 1076124A
Authority
GB
United Kingdom
Prior art keywords
suspension
steam
heat treatment
treatment
fibrous material
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
GB10231/65A
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.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo 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 Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of GB1076124A publication Critical patent/GB1076124A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Fodder In General (AREA)

Abstract

A process for improving the drainage properties of a suspension of fibres obtained from a raw material containing a proportion of bark and suitable for use in the production of fibreboard &c. comprises subjecting the suspension of liberated fibres to a heat treatment at 60 DEG -300 DEG C such that the solid content at the end of the treatment is 30 - 80% and for a sufficient length of time so that after dilution with water to a consistency suitable for sheet formation the drainage properties of the suspension are better by at least 5 Defibrator seconds-as defined in the specification-than those of a similar suspension which has not been given the heat treatment. The fibrous material may include the bark of spruce, pine, fir, birch, or aspen and also chips of these woods, waste material from pulp manufacture or from saw mills, and asbestos. The treatment, which may be in one or more steps, is by hot air or steam at atmospheric or elevated pressures, and may be carried out before and/or after the fibrous material is refined. In the particular example described the raw material is defibrated in the presence of steam, and blown in a steam suspension into a cyclone into which water at 60 DEG C was also introduced. The fibrous material passes from the bottom of the cyclone on to a conveyor belt in a heat insulated casing for the heat treatment, and from thence into a stock bin for dilution.
GB10231/65A 1964-03-10 1965-03-10 Method of making fibreboard and the like Expired GB1076124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE298464 1964-03-10

Publications (1)

Publication Number Publication Date
GB1076124A true GB1076124A (en) 1967-07-19

Family

ID=20261141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10231/65A Expired GB1076124A (en) 1964-03-10 1965-03-10 Method of making fibreboard and the like

Country Status (8)

Country Link
US (1) US3446697A (en)
AT (1) AT264803B (en)
CH (1) CH441737A (en)
DE (1) DE1436947A1 (en)
FR (1) FR1426012A (en)
GB (1) GB1076124A (en)
NL (1) NL6502589A (en)
NO (1) NO118472B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907630A (en) * 1971-01-20 1975-09-23 Defibrator Ab Method of fiber board article production employing predrying of the ligno-cellulosic material prior to liquid suspension and article formation, and employing water recirculation
SE7317565L (en) * 1973-12-28 1975-06-30 Selander Stig Daniel
LU76172A1 (en) * 1976-11-11 1978-07-10
JP7540182B2 (en) * 2020-03-31 2024-08-27 セイコーエプソン株式会社 Raw materials for manufacturing fiber molded bodies and method for manufacturing fiber molded bodies

Family Cites Families (4)

* 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
US2317394A (en) * 1939-11-18 1943-04-27 Masonite Corp Process for making hardboard
US2759837A (en) * 1952-10-13 1956-08-21 Weyerhaeuser Timber Co Process of forming molded cellulose products
US2870009A (en) * 1955-06-15 1959-01-20 Kamyr Ab Method and apparatus for the separation of liquids from cellulosic pulp

Also Published As

Publication number Publication date
NO118472B (en) 1969-12-29
AT264803B (en) 1968-09-10
FR1426012A (en) 1966-01-24
DE1436947A1 (en) 1969-01-16
US3446697A (en) 1969-05-27
CH441737A (en) 1967-08-15
NL6502589A (en) 1965-09-13

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