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FR2544222A1 - Method for fragmenting or defibring permeable porous materials - Google Patents

Method for fragmenting or defibring permeable porous materials Download PDF

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Publication number
FR2544222A1
FR2544222A1 FR8306327A FR8306327A FR2544222A1 FR 2544222 A1 FR2544222 A1 FR 2544222A1 FR 8306327 A FR8306327 A FR 8306327A FR 8306327 A FR8306327 A FR 8306327A FR 2544222 A1 FR2544222 A1 FR 2544222A1
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FR
France
Prior art keywords
pressure
gas
fragmenting
water
enclosure
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.)
Pending
Application number
FR8306327A
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French (fr)
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.)
FANJAT DE SAINT FONT ANDRE
Original Assignee
FANJAT DE SAINT FONT ANDRE
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 FANJAT DE SAINT FONT ANDRE filed Critical FANJAT DE SAINT FONT ANDRE
Priority to FR8306327A priority Critical patent/FR2544222A1/en
Publication of FR2544222A1 publication Critical patent/FR2544222A1/en
Pending legal-status Critical Current

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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
    • 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
    • D21B1/30—Defibrating by other means
    • D21B1/36—Explosive disintegration by sudden pressure reduction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

The present invention relates to a method for fragmenting or defibering permeable porous materials. According to the invention, the material is placed in an enclosure in which a gas or superheated water at a high pressure is admitted; this pressure is maintained for sufficiently long to enable the gas or the water to diffuse into the cavities of the material, and then the pressure is reduced in the enclosure as quickly as possible.

Description

Procédé de fragmentation ou de défibrement de matériaux poreux perméables.Process for the fragmentation or defiberation of porous permeable materials.

La présente invention concerne un procédé de fragmentation ou de défibrement de matériaux poreux perméables. The present invention relates to a method of fragmenting or defibering permeable porous materials.

Ce procédé est caractérisé en ce qu'on place le matériau dans une enceinte dans laquelle on admet un gaz ou de l'eau surchauffée sous une pression élevée, qu'on maintient cette pression suffisamment longtemps pour que le gaz ou l'eau puisse diffuser dans les cavités du matériau, et en ce qu'on fait alors baisser la pression dans 11 enceinte aussi rapidement que possible. This process is characterized in that the material is placed in an enclosure into which a gas or superheated water is admitted under high pressure, that this pressure is maintained long enough for the gas or water to diffuse in the cavities of the material, and in that the pressure in the enclosure is then reduced as quickly as possible.

Lorsqu'on admet le gaz ou lBeau sous pression dans l'enceint te, le gaz ou l'eau diffuse a l'intérieur du matériau dont les pores ou cavités se remplissent de gaz ou d'eau plus ou moins raD pidement, selon la perméabilité du matériau. Cette mise sous pression peut être effectuée progressivement ou par étapes, pour év ter un écrasement des fibres. Un équilibre, dans lequel la pression dans les cavités est égale à celle régnant dans l'ensemble a finit par s'établir. Lors de la baisse de pression qui suit, le gaz ou l'eau qui se vaporise alors, n'a pratiquement pas le temps de s'échapper des cavités qui sont mises en traction et se rompent, se déchirent ou se défibrent. When gas or water under pressure is admitted into the enclosure, the gas or water diffuses inside the material, the pores or cavities of which fill up with gas or water more or less quickly, depending on the material permeability. This pressurization can be carried out gradually or in stages, to avoid crushing of the fibers. A balance, in which the pressure in the cavities is equal to that prevailing in the whole has finally been established. During the following pressure drop, the gas or water which vaporizes then has practically no time to escape from the cavities which are put in traction and break, tear or defiberate.

On peut, préalablement à la mise sous pression du matériau, chauffer celui-ci ou augmenter sa teneur en eau afin de ramollir le tissu fibreux et d'abaisser ses caractéristiques mécaniques. One can, before pressurizing the material, heat it or increase its water content in order to soften the fibrous tissue and lower its mechanical characteristics.

On peut alors utiliser des pressions plus faibles et obtenir des fibres plus grosses.We can then use lower pressures and obtain larger fibers.

Le procédé selon l'invention est particulièrement applicable au défibrement du bois. Dans ce cas, on peut mallltenir le bois a une pression qui peut atteindre 100 bars pendant une durée qui dé- pend de l'épaisseur de la pièce de bois et qui peut atteindre cinq à dix heures; le bois peut être préalablement porté a une tempéra ture inférieure à 1000 C et à un taux d'humidité inférieur à 30,
Après traitement, on obtint un paquet de longues fibres sé- parées les unes des autres, qui peut-etre utilisé comme isolant thermique, ou dans la papeterie. Alors que le bois non traité ab- sorbe très difficilement de la résine, le bois traité selon l'invention s'en imprègne très facilement, du fait de l'ouverture de ses cellules. Ainsi traité et imprégné il peut être utilisé dans la construction ou comme matériau décoratif. The method according to the invention is particularly applicable to the defiberation of wood. In this case, the wood can be maintained at a pressure which can reach 100 bars for a period which depends on the thickness of the piece of wood and which can reach five to ten hours; the wood can be brought beforehand to a temperature below 1000 C and to a humidity rate below 30,
After treatment, a bundle of long fibers separated from each other was obtained, which can be used as thermal insulation, or in stationery. While the untreated wood absorbs resin very difficultly, the wood treated according to the invention very easily permeates it, due to the opening of its cells. Thus treated and impregnated it can be used in construction or as a decorative material.

Claims (5)

REVENDICATIONS 1. Procédé de fragmentation ou de défibration de matériaux poreux perméables, caractérisé en ce qu'on place le matériau dans une enceinte dans laquelle on admet un gaz ou de l'eau surchauffée, sous une pression élevée, qu'on maintient cette pression suffisamment longtemps pour que le gaz ou l'eau puisse diffuser dans les cavités du matériau, et en ce qu'on fait alors baisser la pression dans l'enceinte aussi rapidement que possible. 1. A method of fragmenting or defibrating permeable porous materials, characterized in that the material is placed in an enclosure in which a gas or superheated water is admitted, under high pressure, that this pressure is maintained sufficiently a long time so that gas or water can diffuse in the cavities of the material, and in that one makes then lower the pressure in the enclosure as quickly as possible. 2. Procédé selon la revendication 1, caractérisé en ce qu'on chauffe préalablement le matériau, à une température qui, dans le cas du bois, est inférieure à 1000 C.  2. Method according to claim 1, characterized in that the material is heated beforehand, to a temperature which, in the case of wood, is less than 1000 C. 3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on augmente préalablement la teneur en eau du matériau, de fa çon qu'il présente un taux d'humidité qui, dans le cas du bois, peut atteindre 30%. 3. Method according to claim 1 or 2, characterized in that the water content of the material is increased beforehand, so that it has a moisture content which, in the case of wood, can reach 30%. 4. Matériau poreux caractérisé en ce qu'il est traité selon le procédé défini à l'une des revendications 1 à 3. 4. Porous material characterized in that it is treated according to the process defined in one of claims 1 to 3. 5. Matériau selon la revendication 4, caractérisé en ce qu' après traitement il est imprégné de résine.  5. Material according to claim 4, characterized in that after treatment it is impregnated with resin.
FR8306327A 1983-04-13 1983-04-13 Method for fragmenting or defibring permeable porous materials Pending FR2544222A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8306327A FR2544222A1 (en) 1983-04-13 1983-04-13 Method for fragmenting or defibring permeable porous materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8306327A FR2544222A1 (en) 1983-04-13 1983-04-13 Method for fragmenting or defibring permeable porous materials

Publications (1)

Publication Number Publication Date
FR2544222A1 true FR2544222A1 (en) 1984-10-19

Family

ID=9287975

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8306327A Pending FR2544222A1 (en) 1983-04-13 1983-04-13 Method for fragmenting or defibring permeable porous materials

Country Status (1)

Country Link
FR (1) FR2544222A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6413362B1 (en) 1999-11-24 2002-07-02 Kimberly-Clark Worldwide, Inc. Method of steam treating low yield papermaking fibers to produce a permanent curl
US6506282B2 (en) 1998-12-30 2003-01-14 Kimberly-Clark Worldwide, Inc. Steam explosion treatment with addition of chemicals
WO2003041926A1 (en) * 2001-11-13 2003-05-22 KÄRKI, Timo Method for pretreating timber

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1586159A (en) * 1924-09-24 1926-05-25 William H Mason Low-temperature explosion process of disintegrating wood and the like
DE492795C (en) * 1926-01-30 1930-03-01 Mason Fibre Company Process for shredding lignin and cellulose-containing substances (such as wood chips)
US1793711A (en) * 1928-12-27 1931-02-24 Albert M Johnson Method of wood disintegration
DE559405C (en) * 1927-09-23 1932-09-20 Arthur St Klein Dipl Ing Dr Process for the production of finely divided wood pulp
US1979341A (en) * 1929-04-11 1934-11-06 Cellulose Res Corp Process for preparing cellulose
US2516847A (en) * 1944-12-01 1950-08-01 Masonite Corp Process of sizing exploded fibers
DE1051624B (en) * 1955-09-22 1959-02-26 Ph Kanzler Soehne K G Process for defibrating fibrous materials

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1586159A (en) * 1924-09-24 1926-05-25 William H Mason Low-temperature explosion process of disintegrating wood and the like
DE492795C (en) * 1926-01-30 1930-03-01 Mason Fibre Company Process for shredding lignin and cellulose-containing substances (such as wood chips)
DE559405C (en) * 1927-09-23 1932-09-20 Arthur St Klein Dipl Ing Dr Process for the production of finely divided wood pulp
US1793711A (en) * 1928-12-27 1931-02-24 Albert M Johnson Method of wood disintegration
US1979341A (en) * 1929-04-11 1934-11-06 Cellulose Res Corp Process for preparing cellulose
US2516847A (en) * 1944-12-01 1950-08-01 Masonite Corp Process of sizing exploded fibers
DE1051624B (en) * 1955-09-22 1959-02-26 Ph Kanzler Soehne K G Process for defibrating fibrous materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6506282B2 (en) 1998-12-30 2003-01-14 Kimberly-Clark Worldwide, Inc. Steam explosion treatment with addition of chemicals
US6413362B1 (en) 1999-11-24 2002-07-02 Kimberly-Clark Worldwide, Inc. Method of steam treating low yield papermaking fibers to produce a permanent curl
WO2003041926A1 (en) * 2001-11-13 2003-05-22 KÄRKI, Timo Method for pretreating timber

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