EP0671504B1 - Verfahren zur Herstellung von geschäumtem Material aus Altpapier und dgl. - Google Patents

Verfahren zur Herstellung von geschäumtem Material aus Altpapier und dgl. Download PDF

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Publication number
EP0671504B1
EP0671504B1 EP95101694A EP95101694A EP0671504B1 EP 0671504 B1 EP0671504 B1 EP 0671504B1 EP 95101694 A EP95101694 A EP 95101694A EP 95101694 A EP95101694 A EP 95101694A EP 0671504 B1 EP0671504 B1 EP 0671504B1
Authority
EP
European Patent Office
Prior art keywords
pulp
foamed material
microwaves
mold
producing foamed
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 - Lifetime
Application number
EP95101694A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0671504A1 (de
Inventor
Norbert Dr.-Ing. Habelski
Edgar Dr.-Ing. Brandauer
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.)
Vodermair Hermann
Original Assignee
Vodermair Hermann
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 Vodermair Hermann filed Critical Vodermair Hermann
Publication of EP0671504A1 publication Critical patent/EP0671504A1/de
Application granted granted Critical
Publication of EP0671504B1 publication Critical patent/EP0671504B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21J1/06—Drying
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/002—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines by using a foamed suspension
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/16—Drying webs by electrical heating
    • D21F5/167—Microwave heating

Definitions

  • the invention relates to a process for the production of foamed material from waste paper and the like. With any initial shape according to the preamble of claim 1.
  • raw materials paper, cardboard, waste cardboard or materials with similar properties can be used, either according to type or as a raw material mixture.
  • the invention should preferably make a contribution to environmental protection through the recovery and processing of secondary raw materials, which are available to a considerable extent.
  • Various end products can be produced by the method according to the invention, in particular structural elements for heat and impact sound insulation, as well as those for vibration and shock absorption, furthermore roof covering or wall cladding panels, composite panels, other shaped bodies for use as filler material for insulation and packaging purposes. Special treatments are possible by adding, for example, hydrophobicizing agents, flame retardants, putrefactive substances or reaction aids.
  • the lists are to be understood as examples.
  • An essential known process step is the production of a liquid, vzw. aqueous pulp from the raw materials mentioned, hereinafter referred to as paper pulp, including comminution and mixing of the components.
  • the task to be solved was to shorten the known methods in time, which is ultimately the prerequisite for the process to be able to be carried out continuously, for the expenditure on equipment and heat losses to be reduced.
  • microwave radiation which is preferably in the range of 915 MHz and 2.45 GHz, instead of the conventional heat treatment.
  • the advantages of this method of energy input lie in the fact that, in contrast to heat rays, very high energy densities can be achieved with microwaves and the energy does not act on the paper pulp from the surface, but penetrates into it and heats the liquid directly and evaporates it . With a corresponding energy density, the process takes place so violently that the steam produced, through the creation of paths for its outflow from the volume of the paper pulp irradiated, causes the mass to expand and puts it in a porous state.
  • This process is a drying process as a result of the removal of liquid, a material consolidation sets in during the volume increase of the pulp, which stabilizes the voids created in the pulp.
  • the process can be supported by foam-forming and stabilizing additives.
  • Microwave radiation is able to penetrate materials with a corresponding dielectric constant, for example glass or paper, without loss of energy.
  • Other materials absorb microwave radiation, ie they take over the energy of the microwaves.
  • This process is also referred to as coupling to the microwaves. This happens in the molecular area and manifests itself in a warming of the coupling material.
  • This material includes, for example, water in the liquid state. In a water-containing paper pulp, the energy provided by the microwaves is therefore transferred directly and only to the water molecules. The heat is generated in the irradiated volume, i.e.
  • the irradiated body is not dimensionally stable, as is the case with the paper pulp under consideration, then the steam flowing out in the body creates flow paths in the form of cavities.
  • the body takes on a porous structure. It loosens up considerably. Its volume increases. Since the hardening process due to drying of the material begins at the same time, this voluminous and porous structure is retained. Certain additives such as binders or foaming agents support this process. In terms of process technology, this means a considerable simplification of the aftertreatment. Otherwise, procedural steps are saved.
  • a technical solution for the implementation of this process for the production of foamed material, in particular moldings, depends on the objective of the production and can be operated batchwise or continuously. In terms of apparatus, it must be guaranteed that, taking into account the increase in volume of the pulp, a largely unimpeded irradiation with microwaves is possible and at the same time the water vapor can flow out of the mold uninhibited.

Landscapes

  • Paper (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP95101694A 1994-02-11 1995-02-07 Verfahren zur Herstellung von geschäumtem Material aus Altpapier und dgl. Expired - Lifetime EP0671504B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4404322 1994-02-11
DE4404322A DE4404322A1 (de) 1994-02-11 1994-02-11 Verfahren zur Herstellung von geschäumtem Material aus Altpapier u. dgl.

Publications (2)

Publication Number Publication Date
EP0671504A1 EP0671504A1 (de) 1995-09-13
EP0671504B1 true EP0671504B1 (de) 1997-08-06

Family

ID=6510008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101694A Expired - Lifetime EP0671504B1 (de) 1994-02-11 1995-02-07 Verfahren zur Herstellung von geschäumtem Material aus Altpapier und dgl.

Country Status (7)

Country Link
EP (1) EP0671504B1 (da)
AT (1) ATE156541T1 (da)
CA (1) CA2142222C (da)
DE (2) DE4404322A1 (da)
DK (1) DK0671504T3 (da)
FI (1) FI105280B (da)
NO (1) NO307191B1 (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11255051B2 (en) 2017-11-29 2022-02-22 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US11313061B2 (en) 2018-07-25 2022-04-26 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707579A (en) * 1994-02-11 1998-01-13 Schweitzer, Vodermair & Schimmer-Wottrich Gbr Process for producing foamed material from waste paper and the like
DE19546295A1 (de) * 1995-12-12 1997-06-19 Schweitzer Jacob Verfahren zur Herstellung eines Schaumkörpers aus zellulosehaltigen Stoffen
EP0740990A3 (de) * 1995-05-02 1997-05-28 Schweitzer Jacob Verfahren zur Definition verschiedener Eigenschaften von zellulosehaltigen Schaumstoffen
DE19546296A1 (de) * 1995-05-02 1996-11-07 Schweitzer Jacob Verfahren zur Definition verschiedener Eigenschaften von Schaumkörpern aus zellulosehaltigen Stoffen und verfahrensgemäß hergestellte Schaumkörper
KR100232121B1 (ko) * 1997-06-10 1999-12-01 허방욱 셀룰로오스물질을 발포시킨 완충단열재의 새로운 제조방법
DE10312758A1 (de) 2003-03-21 2004-09-30 Saueressig Gmbh & Co. Herstellungsverfahren für absorbierendes Faserprodukt und absorbierendes Faserprodukt
WO2005007968A1 (en) * 2003-07-16 2005-01-27 Fira International Limited Recycling of lignocellulose based board materials
GB201612889D0 (en) 2016-07-26 2016-09-07 Natural Resources (2000) Ltd Moulding of articles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR873763A (fr) * 1939-09-20 1942-07-20 Nouveau produit fibreux et procédé de fabrication
DE3420195A1 (de) * 1984-05-30 1985-12-12 Friedrich 2807 Achim Priehs Verfahren zum herstellen von daemmaterial aus altpapier und/oder pappe
DE4105245C1 (en) * 1991-02-20 1992-10-22 Viessmann Werke Gmbh & Co, 3559 Allendorf, De Rapidly drying moulded bodies - formed by suction on fibrous sludge, placed in enclosed zone at low-pressure
DE4207233A1 (de) * 1992-03-07 1993-11-18 Geier Henninger Kurt Verfahren zur Herstellung von porösen Filterkörpern

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint
US11255051B2 (en) 2017-11-29 2022-02-22 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US12043963B2 (en) 2017-11-29 2024-07-23 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US11313061B2 (en) 2018-07-25 2022-04-26 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
US11788221B2 (en) 2018-07-25 2023-10-17 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
US12116706B2 (en) 2018-07-25 2024-10-15 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens

Also Published As

Publication number Publication date
ATE156541T1 (de) 1997-08-15
DE59500454D1 (de) 1997-09-11
NO950510L (no) 1995-08-14
EP0671504A1 (de) 1995-09-13
DE4404322A1 (de) 1995-08-17
DK0671504T3 (da) 1998-03-02
FI950589A0 (fi) 1995-02-10
NO307191B1 (no) 2000-02-21
NO950510D0 (no) 1995-02-10
CA2142222C (en) 2000-11-07
CA2142222A1 (en) 1995-08-12
FI105280B (fi) 2000-07-14
FI950589A (fi) 1995-08-12

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