EP0043290A1 - Verfahren und Vorrichtung zur Herstellung eines nichtgewebten Bahnmaterials aus Cellulosefasern - Google Patents

Verfahren und Vorrichtung zur Herstellung eines nichtgewebten Bahnmaterials aus Cellulosefasern Download PDF

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Publication number
EP0043290A1
EP0043290A1 EP81302998A EP81302998A EP0043290A1 EP 0043290 A1 EP0043290 A1 EP 0043290A1 EP 81302998 A EP81302998 A EP 81302998A EP 81302998 A EP81302998 A EP 81302998A EP 0043290 A1 EP0043290 A1 EP 0043290A1
Authority
EP
European Patent Office
Prior art keywords
web
forming
ply
cellulosic material
band
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.)
Withdrawn
Application number
EP81302998A
Other languages
English (en)
French (fr)
Inventor
Brian William Attwood
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.)
BLACK-CLAWSON INTERNATIONAL Ltd
Original Assignee
BLACK-CLAWSON INTERNATIONAL Ltd
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 BLACK-CLAWSON INTERNATIONAL Ltd filed Critical BLACK-CLAWSON INTERNATIONAL Ltd
Publication of EP0043290A1 publication Critical patent/EP0043290A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the present invention relates to the production of non-woven sheets or webs of fibrous cellulosic material suitable for the manufacture of paper, paperboard, folding boxboard or carton board.
  • the present invention consists in a process for the production of a non-woven web of fibrous cellulosic material, characterised by the steps of defibering moist cellulosic material, dry-forming a web of said defibered material, and consolidating the web by advancing said web through one or more heated pressure nips provided between one or more rotating heated cylinders and one or more cooperating pressure rollers, and retaining the web in contact with at least a part of the circumference of the or each heated cylinder by means of a supporting band.
  • the invention consists in apparatus for producing a non-woven web of fibrous cellulosic material, characterised by means for defibering moist cellulosic material, means for dry-forming a web of said defibered cellulosic material, and press-drying means for consolidating said web including one or more heated pressure nips provided between one or more rotating heated cylinders and one or more cooperating pressure rollers, and a supporting band guided through the pressure nip or nips for retaining the web in contact with at least a part of the circumference of the or each heated cylinder.
  • the supporting band is constituted by a travelling foraminous forming band on which the web of cellulosic material is initially formed, this forming band being advanced through the pressure nip(s), together with the web, and retaining or or pressing the web continuously in contact with the heated cylinder(s) during advance of the web through the nip(s) and about the cylinder(s).
  • the defibered cellulosic material may have a moisture content of 30-40% by weight.
  • the moisture content is brought to at least 40% by weight before dry-forming, and the forming is effected by entraining the moist defibered material in an air stream and depositing it on a forming band.
  • the linear nip pressure in the press-drier may be of the order of 25-45kg/cm, preferably 35kg/cm, and the nip temperature may be in the range from 65-180°C, preferably about 110°C.
  • the invention may also be utilised for the production of a multi-ply web of cellulosic material.
  • a second web of fibrous cellulosic material is wet-formed and the dry-formed web is deposited on this second web so as to produce a second ply thereon.
  • a third wet-formed web of cellulosic material is then deposited on the second ply to form a third ply thereon, and the resulting three-ply web is consolidated by press-drying, as hereinbefore described.
  • the second web is wet-formed on a foraminous forming band and this forming band, together with the three-ply web deposited thereon, is advanced through the pressure nip(s) and about the heated cylinder(s) and the forming band serves as the supporting band to retain the three-ply.web pressed in contact with at least a part of the circumference of.. the or each cylinder.
  • the invention enables the production of paper, paperboard, folding boxboard or carton board from wood or cellulosic rag fibre in a continuous process on a single manufacturing installation, thus resulting in significant economies in space requirements, energy utilisation and usage of water.
  • moist wood pulp is defibered in suitable defibering equipment, such, as a hammer mill (not shown), its moisture content being about 40% by weight.
  • the moist defibered pulp is entrained in an air stream and laid by means of a distributor head 10 onto an endless foraminous forming band or wire 11 travelling over a vacuum box 12 disposed immediately beneath the distributor head so as to form a non-woven web of the defibered pulp.
  • the resulting web is.consolidated by feeding it through a press-drying section whilst supported by the forming band 11.
  • each pressure roller 15 may be about 35kg/cm.
  • the web is pressed into contact with the heated cylinder during and between its travel through the pressure nips by the forming band 11. As a result, the moisture content of the web is reduced to within a range of from 15-20%.
  • the web 16 is separated from the cylinder 14 and the band 11 at the final nip 13 by a take- off roller 17 and is then fed to further driers, size presses and other treatment units (not shown) before passing, as finished web, to reel-up units.
  • the band 11 Upon leaving the final nip 13, the band 11 is returned to the distributor head 10 via guide and tensioning rollers 18.
  • the web so formed is virtually "square" in that the ratio of its physical properties, such as, stiffness in the cross-machine direction and the machine direction is substantially 1:1. The same ratio is applicable to the physical characteristics of the web taken in any two mutually perpendicular directions in the plane of the web thus providing an "homogenous" sheet material.
  • the sheet material has good dimensional stability ⁇ when subjected to changes in atmospheric humidity.
  • Fig. 3 this illustrates a method of producing a multi-ply web using the process and apparatus of Fig. 1 in combination with known wet-forming techniques.
  • a cellulosic fibre first ply of wood fibre pulp containing about 1-2% solids by weight is wet-laid on a travelling forming band using a known wet-forming technique, such as, that disclosed in British Patent No. 1548924 issued to St. Anne's Board Mill Company Limited.
  • a second step.22 moist wood pulp is defibered in equipment, such as a hammer mill at a moisture content of about 30-40% by weight and, in a third step 23, the moist defibered pulp is entrained in an air stream and deposited on the first ply, as a second ply.
  • a further wet-laid cellulosic fibre ply is formed in a similar manner to the wet-forming of the ply at 21 and is deposited on the second ply.
  • the dry-laid second ply is sandwiched between the two wet-laid plies.
  • the multi-ply web is consolidated by the press-drying procedure described above with reference to Fig. 1.
  • the resultant product is found to have its strength and stiffness concentrated in its outermost wet-laid plies.
  • the linear nip pressure may be varied between 26-45kg/cm and the surface temperature of the cylinder 14 may be in the range from 65-180 0 C.
  • the multi-ply sheet may be made by forming the plies on separate forming bands and combining them by the use of transfer rollers and the like.

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  • Paper (AREA)
EP81302998A 1980-07-02 1981-07-01 Verfahren und Vorrichtung zur Herstellung eines nichtgewebten Bahnmaterials aus Cellulosefasern Withdrawn EP0043290A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8021674 1980-07-02
GB8021674 1980-07-02

Publications (1)

Publication Number Publication Date
EP0043290A1 true EP0043290A1 (de) 1982-01-06

Family

ID=10514479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81302998A Withdrawn EP0043290A1 (de) 1980-07-02 1981-07-01 Verfahren und Vorrichtung zur Herstellung eines nichtgewebten Bahnmaterials aus Cellulosefasern

Country Status (3)

Country Link
EP (1) EP0043290A1 (de)
JP (1) JPS5739300A (de)
FI (1) FI812061L (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227011A (en) * 1990-06-22 1993-07-13 Ibiden Co., Ltd. Method for producing a second harmonic wave generating device
US5871707A (en) * 1995-05-18 1999-02-16 Sumitomo Chemical Company, Limited Process for producing chlorine
CN103314155A (zh) * 2010-12-17 2013-09-18 王子控股株式会社 纤维片制造装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011010609A1 (ja) * 2009-07-24 2011-01-27 王子製紙株式会社 繊維シートの製造装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810940A (en) * 1953-04-23 1957-10-29 Orrie J Mills Paper manufacture
US4011034A (en) * 1972-07-08 1977-03-08 Karl Kroyer St. Anne's Limited Production of fibrous sheet material
FR2337227A1 (fr) * 1976-01-05 1977-07-29 Tsnii Bumagi Procede de fabrication d'un materiau fibreux en feuilles
US4046622A (en) * 1973-08-23 1977-09-06 Karl Kroyer St. Anne's Limited Multi-ply fibrous sheets having a wet-laid ply and a dry-laid ply
AU1262976A (en) * 1975-04-03 1977-10-06 Australian Paper Manufacturers Ltd Sheet manufacture
FR2388937A1 (fr) * 1977-04-29 1978-11-24 Kroyer St Annes Ltd Karl Procede pour fabriquer un produit cellulosique, notamment du carton ou du papier
US4217169A (en) * 1975-12-12 1980-08-12 Aizenberg Sergei A Method of manufacturing fibrous sheet material

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810940A (en) * 1953-04-23 1957-10-29 Orrie J Mills Paper manufacture
US4011034A (en) * 1972-07-08 1977-03-08 Karl Kroyer St. Anne's Limited Production of fibrous sheet material
US4046622A (en) * 1973-08-23 1977-09-06 Karl Kroyer St. Anne's Limited Multi-ply fibrous sheets having a wet-laid ply and a dry-laid ply
AU1262976A (en) * 1975-04-03 1977-10-06 Australian Paper Manufacturers Ltd Sheet manufacture
US4217169A (en) * 1975-12-12 1980-08-12 Aizenberg Sergei A Method of manufacturing fibrous sheet material
FR2337227A1 (fr) * 1976-01-05 1977-07-29 Tsnii Bumagi Procede de fabrication d'un materiau fibreux en feuilles
FR2388937A1 (fr) * 1977-04-29 1978-11-24 Kroyer St Annes Ltd Karl Procede pour fabriquer un produit cellulosique, notamment du carton ou du papier
GB1595905A (en) * 1977-04-29 1981-08-19 Kroyer St Annes S Ltd Karl Process for making a cellulosic product

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227011A (en) * 1990-06-22 1993-07-13 Ibiden Co., Ltd. Method for producing a second harmonic wave generating device
US5871707A (en) * 1995-05-18 1999-02-16 Sumitomo Chemical Company, Limited Process for producing chlorine
CN103314155A (zh) * 2010-12-17 2013-09-18 王子控股株式会社 纤维片制造装置
EP2653609A1 (de) * 2010-12-17 2013-10-23 Oji Holdings Corporation Vorrichtung zur herstellung einer faserstoffbahn
EP2653609A4 (de) * 2010-12-17 2014-06-25 Oji Holdings Corp Vorrichtung zur herstellung einer faserstoffbahn
US8845862B2 (en) 2010-12-17 2014-09-30 Oji Holdings Corporation Device for producing fibrous sheet
CN103314155B (zh) * 2010-12-17 2015-09-09 王子控股株式会社 纤维片制造装置

Also Published As

Publication number Publication date
JPS5739300A (en) 1982-03-04
FI812061L (fi) 1982-01-03

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19820625

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830921

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ATTWOOD, BRIAN WILLIAM