EP0601142B1 - Verfahren und vorrichtung zum herstellen von faserförmigen produkten - Google Patents

Verfahren und vorrichtung zum herstellen von faserförmigen produkten Download PDF

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Publication number
EP0601142B1
EP0601142B1 EP93910053A EP93910053A EP0601142B1 EP 0601142 B1 EP0601142 B1 EP 0601142B1 EP 93910053 A EP93910053 A EP 93910053A EP 93910053 A EP93910053 A EP 93910053A EP 0601142 B1 EP0601142 B1 EP 0601142B1
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EP
European Patent Office
Prior art keywords
fibers
mat
flow
gaseous medium
chamber
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Expired - Lifetime
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EP93910053A
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English (en)
French (fr)
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EP0601142A1 (de
Inventor
Jorma Nieminen
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Valmet Technologies Oy
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Valmet Oy
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/12—Moulding of mats from fibres

Definitions

  • the present invention relates to a method as set forth in the preamble of the appended claim 1 for making a fibrous product as well as to an apparatus as set forth in the preamble of the appended claim 10 for making a fibrous product.
  • International publication No. WO 82/03359 discloses a method for making a moldable mat from wood fibers such that the wood fibers are intertwined with thermally bondable binder fibers which bond the fibers together upon melting and setting.
  • the mat is formed by using a so-called dry process on a moving belt by means of an air flow, which transports the fibers onto the belt and travels through the mat. This is followed by a mat bonding process by carrying the thus formed mat through an oven, having a sufficiently high temperature for softening the binder fibers, which are of thermoplastic plastics material, and bringing them in an adhesive state for bonding the wood fibers to each other.
  • the above method is not only capable of producing mats by using binders that are not hazardous in view of safety at work and environment but can also be used for readily manufacturing products that can be subsequently molded into a desired shape by the application of heat, since the thermoplastic characteristics of binder fibers can be used for re-softening such fibers, whereby the mat is subjected to reshaping and subsequent cooling for bringing said fibers to set the mat in a reshaped form.
  • thermoplastic fibers included therein would then melt or fuse completely away as globular drops not capable of bonding the fibers together and the mat would break up. It is obvious that the above processes are not feasible in terms of energy consumption, either.
  • An object of the invention is to eliminate the above drawbacks and to provide a method as well as an apparatus, whereby it is possible to employ wood fibers for making quite thick fibrous mats having excellent thermal insulation capacity.
  • a method of the invention is primarily characterized by what is set forth in the characterizing section of the appended claim 1.
  • thermally bondable binder fibers intertwined with cellulosic fibers of vegetable origin are subjected to heat bringing them to a binding state as early as in the air flow carrying said fibers onto a processing platform by setting the air flow temperature sufficiently high, the heat insulation characteristics of the fibers do not present a problem.
  • Thermally bondable binder fibers bond wood fibers to each other already at the manufacturing stage of a mat. In practice, this facilitates the manufacture of even a very thick mat, since fresh fibers bonding into a mat can be stacked basically in quantities as large as may be desired on top of a mat previously formed at the manufacturing site of a mat.
  • a mat can be compressed to a desired extent by the application of an air flow as it is still in a moldable state after manufacturing.
  • the mat is preferably molded into a building element insulation in view of making full use of the health protecting qualities of the product.
  • An apparatus of the invention is in turn characterized by what is set forth in the characterizing section of the appended claim 10.
  • An air chamber in which a mat is formed on a conveying platform, receives an air duct from a heater for heating the binder fibers to an adhesive state already in the air chamber.
  • the apparatus does not require a long oven for thermally bonding the product.
  • the appended non-independent claims 11-14 disclose other preferred alternative embodiments for an apparatus of the invention.
  • Fig. 1 illustrates a mat forming assembly, including a feeding mechanism 11 for fibers.
  • the feeding mechanism may comprise either a per se known vertical device 11a for bringing the fibers by means of an air flow, or a horizontal conveyor 11b, whose inlet end is provided with per se known pretreating means for fibers.
  • the bottom end of feeding mechanism 11 is provided with a feeding roll 2 having studs on its surface in a dense pattern. Facing towards the surface of feeding roll 2 is a horizontal narrow slit orifice at the end of a first air conduit 3. Below the slit orifice is located an inlet for a second air conduit 4, with a constriction point formed between its bottom wall and the surface of feeding roll 2. Downstream of this constriction point there is an obliquely declining, expanding air chamber 6, having its lower end closed with an air permeable forming platform 1. On the opposite side of forming platform 1 lies a collecting chamber 10.
  • the forming platform 1 is formed of an endless belt, extended around cylinders and adapted to travel across chamber 6. Downstream of chamber 6 said forming platform travels across a second air chamber 8, providing a bottom surface therefor.
  • first air conduit 3 The inlet end of first air conduit 3 is provided with mutually parallel fans 12 for producing a uniform air flow across the entire width of duct 6. These fans 12 are shown by dash lines in fig. 2.
  • a duct serving as the inlet end of second air conduit 4 is also provided with a fan 13, which is adapted to blow air heated by a heater 7 into said second air conduit 4.
  • Heater 7 can be for example a conventional gas burner.
  • the mat-forming process in the apparatus is such that a mixture of cellulosic fibers and thermally bondable binder fibers is delivered by means of the feeding mechanism towards feeding roll 2.
  • Fig. 4 shows the subsequent matforming process in more detail.
  • the rotating feeding roll 2 includes studs 2a, indicated in the figure as the outermost layer of the feeding roll, for picking up and carrying the fibers further. In the rotating direction of the feeding roll, the fibers arrive next in the range of action of a horizontal slit orifice 3a, located at the end of first air conduit 3 and extending across the width of said roll.
  • a high-speed air flow A1 discharging from the slit orifice disengages the fibers from feeding roll 2 while rushing along the roll surface and carries them across the inlet 4a of second air conduit 4 into a constriction point 2b between the bottom wall of said inlet 4a and the surface of feeding roll 2.
  • the fibers are completely disengaged from feeding roll 2 and proceed into an air chamber 6, having a cross-section which expands in the advancing direction of fibers and having a width which is constant and corresponds to the width of a mat to be manufactured.
  • the expansion or flare of the chamber is achieved in a manner such that the front and rear walls, extending in the axial direction of feeding roll 2, i.e. in the lateral direction of a mat being manufactured, diverge from each other.
  • Said second air conduit 4 is used for delivering air as an air flow A2 into said inlet 4a.
  • the temperature of this second air flow A2 is higher than that of said first air flow A1 supplied through said first air conduit 3.
  • this air flow A2 merges into air flow A1 and blends therewith for an air flow A carrying fibers to the outlet end of air chamber 6.
  • the supply rate of this highertemperature air flow A2 is arranged to be such that the temperature of air flow A carrying the fibers in air chamber 6 is sufficient to cause a change on the surface of thermally bondable binder fibers blended with cellulosic fibers to a degree that makes them capable of bonding the fibers into a mat, such as the softening of the surface of the thermoplastic fibers.
  • These binder fibers are well exposed to the action of air, since they travel in the air flow in bare condition.
  • the outlet or trailing end of air chamber 6 is closed by a forming platform 1, which travels across the chamber and can be a woven wire felt or a like air-permeable flat piece of material. The fibers hitting the bottom at the inlet of a conveyor, i.e.
  • Fig. 1 illustrates the subsequent processing of a mat.
  • Downstream of chamber 6 in the traveling direction of forming platform 1 is mounted a packing cylinder 14, whose distance from forming platform 1 is adjustable.
  • the packing cylinder prevents the passage of air in the traveling direction of forming platform 1 out of the air chamber from above the mat.
  • Downstream of the packing cylinder said forming platform 1 carries the mat into a second air chamber 8 located above forming platform 1.
  • the top end of air chamber 8 is provided with an air conduit 9.
  • the second air chamber 8 has a flaring or expanding configuration towards forming platform 1 in the flowing direction of an air current supplied from air conduit 9, i.e. the chamber walls located on the inlet and outlet side of the forming platform are diverging from each other.
  • the pressure of an air flow B supplied into the chamber can be applied for further compressing the mat to a desired degree for providing a desired value for its density.
  • the air flow is delivered through the porous mat and the forming platform 1 supporting it from below and into a second collecting chamber 15 located on the opposite side.
  • said air flow B supplied into second air chamber 8 has such a temperature that for example thermoplastic binder fibers still remain in an adhesive softened state where the fibers allow the deformation of the mat for shaping or molding the mat to a desired density such that the deformation is permanent.
  • the mat Downstream of second chamber 8, the mat is transferred from forming platform 1 onto a conveyor 16 for carrying the bonded mat-shaped product forward for further processing.
  • the further processing effected by means of second air chamber 8 can be omitted.
  • the product density can also be controlled already during a mat-forming operation by means of the flow rate of air current A advancing in air chamber 6, said flow rate dictating the force by which the fibers strike into a mat configuration.
  • Fig. 5 illustrates schematically one possible arrangement for air flows in the invention.
  • the air currents are circulated such that the mat-forming air flow or current A arriving in collecting chamber 10 is delivered by way of fan 12 into first air conduit 3.
  • the air flow has time to cool to such a degree that the first air flow A1 discharging from air conduit 3 through slit orifice 3a is below the temperature capable of bringing the binder fibers to a binding state.
  • this air flow A1 only serves for detaching the fibers from feeding roll 2.
  • it can be used for providing a preheating, whereby the air flow A2 discharging from air conduit 4 need not be given a particularly high temperature.
  • Said air flow A2 is delivered into second air conduit 4 from heater 7 by means of fan 13.
  • the air conduit 4 branches for an air conduit 9 connected to second air chamber 8, whereby some of the heated air flow A1 blown by the fan is extracted as an air flow B performing the further processing of a mat.
  • This also secures that in the further processing said air flow B has a sufficiently high temperature and, since it originates from air conduit 4, which only contains the flow of heated air, its temperature is in fact higher than that of air chamber 6.
  • this air does not cause too big a change in the state of the binder fibers, such as melting of thermoplastic fibers, as those are surrounded by cellulosic fibers serving as heat insulation and, on the other hand, the flow rate of air per unit area remains quite low due to the extent of chamber 8.
  • the air flow B received in second collecting chamber 15 on the other side of forming platform 1 is circulated back to heater 7 by way of an air conduit 18.
  • the chamber 8 also receives air carried along with a mat from chamber 6. This air advances through collecting chamber 15 merging with the return air flowing to heater 7.
  • some of the air progressing in first air conduit 3 is delivered out along a duct 17. This is compensated for by delivering to heater 7 not only circulated air but also compensation air from outside. Air can also be circulated from duct 17 to heater 7, but this degree of circulation is determined by impurities accumulated in the air during the mat manufacturing process.
  • Fig. 5 further illustrates normal measuring and regulation equipment for setting the temperatures of air flows as desired.
  • Fig. 3 shows one preferred fibrous product, which is manufactured by using a flexible mat prepared according to the invention and having a density of appr. 18-25 kg/m 3 .
  • the product comprises a flat rigid building element 5, wherein the mat is fitted as a layer 5c for providing a heat insulation between an outer lining 5a and an inner lining 5e of the building element.
  • the layer 5c can also be made of a plurality of superimposed mats such that the layer will have a thickness of 10-20 cm.
  • the surface of insulation layer 5c facing the outer lining is provided with a windscreen made of a non-woven fabric, with a ventilation gap remaining between the outer lining and the windscreen.
  • vapour barrier sheet 5d which can comprise a plastic sheet or film laminated on the surface of insulation layer 5c.
  • the vapour barrier 5d is covered with inner lining 5e made of gypsum board.
  • Suitable raw materials for use as a mat include all vegetable-based cellulosic fibers, especially fibers based on woody-stem plants, such as mechanically manufactured pulp.
  • the density of a mat can be controlled by selecting the degree of beating for fibers.
  • the fibers may originate from any variety of wood, but fibers obtained from trees and bushes of the family Salicaceae , such as willows and aspen, are especially preferred due to the length thereof as they can be readily intertwined together.
  • Other conceivable raw materials include cotton or jute either alone or as a mixture with wood fibers.
  • the thermally bondable binder fiber may comprise any thermoplastic polymer, such as e.g. polypropylene or polyester. It is also possible to employ bicomponent fibers containing parts consisting of polymer softening at a lower temperature.
  • the temperature of air current A flowing in air chamber 6 can be set according to the softening point of a binder fiber material and this point, at which the surface of fibers softens to an adhesive or tacky state, is within the range of 100°...200°C on the most commonly used thermoplastic polymer materials.
  • the thermally bondable fibers can also include any fiber types that become bonded by virtue of a change in their structure effected by heat, such as phenol-based fibers.
  • the mat structure can also be controlled by selecting the proportions between binder fiber and cellulosic fiber, but the basic raw material for the structure of a product consists of a vegetable-based cellulosic fiber, which always makes up most of the total mass of a mat.
  • An apparatus of the invention has been used for manufacturing a variety of mats from spruce-based wood fibers as well as polyester fibers.
  • the flow rate of an air current upstream of the air chamber has been in this case 42 m/s and the surface speed of feeding roll 2 has then been appr. 10 m/s slower.
  • the polyester fibers used as binder fibers have covered 15-20 % of the total amount of supplied fibers.
  • the resulting mats have had weights per unit area within the range of 40 g/m 2 - 3000 g/m 2 , the former grammage being that of paper webs.
  • the invention is thus applicable also to the manufacturing of thin products, the advantage being that the bonding can be effected simultaneously when the mat is formed on the support. Densities obtained range from 18 kg/m 3 to 400 g/m 3 , the former density relating primarily to glass- or rockwool used as heat insulation and the latter relating to chipboard.
  • the resulting products have excellent heat insulation qualities for the reason that vegetable-based cellulosic fibers have a low coefficient of heat transfer and such fibers are capable of producing a fluffy mat suitable for insulation purposes.
  • the resulting mats can be further processed for improving certain properties.
  • the mats can be subjected to a fire protection and anti-mildew treatment.
  • the fibers supplied for mat forming can also be treated this way.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Nonwoven Fabrics (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (13)

  1. Verfahren zur Herstellung eines Faserproduktes, wobei ein Strom (A) eines gasförmigen Mediums zur Bildung einer Matte aus pflanzlichen Zellulosefasern auf einer sich fortbewegenden Aufbauplattform (1) verwendet wird und wobei die hatte mittels thermisch bindenden Bindungsfasern gebunden wird, welche mit den Zellulosefasern so verflochten sind, dass die Bindungsfasern, nachdem sie mittels Erhitzung in einen bindenden Zustand gebracht worden sind, die Zellulosefasern in der Matte miteinander verbinden, dadurch gekennzeichnet, dass die thermisch bindenden Bindungsfasern, welche mit den Zellulosefasern verflochten sind, bereits im Strom (A), welcher die Fasern auf die Aufbauplattform (1) bringt, in den bindenden Zustand erhitzt werden, indem die Temperatur des Stroms genügend hoch angesetzt wird.
  2. Verfahren nach Anspruch 1, wobei die Fasern mittels einer Speisewalze (2) oder einem ähnlichen Organ in den Strom (A) des gasförmigen Mediums eingebracht werden, dadurch gekennzeichnet, dass die Fasern von der Speisewalze (2) oder dem ähnlichen Organ abgeführt oder gelöst werden mit Hilfe eines ersten Stromes (A1) eines gasförmigen Mediums, der danach durch einen Strom (A2) eines gasförmigen Mediums mit höherer Temperatur unterstützt wird, derart, dass die Temperatur des kombinierten Stromes (A) des gasförmigen Mediums aus dem ersten und dem zweiten Strom (A1,A2) soweit steigt, dass die Bindungsfasern in den bindenden Zustand gelangen.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Matte, nachdem sie sich unter dem Einfluss des Stromes (A) des gasförmigen Mediums auf der Aufbauplattform (1) gebildet hat, durch einen Nachbehandlungsstrom (B) eines gasförmigen Mediums beaufschlagt wird, wobei die Matte auf der der Strömungsrichtung des gasförmigen Mediums entgegengesetzten Seite getragen wird.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Nachbehandlung eine Verdichtung der Matte bewirkt infolge des Druckes des Stromes (B) des gasförmigen Mediums auf die Matte.
  5. Verfahren nach einem der Ansprüche 2,3 oder 4, dadurch gekennzeichnet, dass der Fasern lösende erste Strom (A1) des gasförmigen Mediums und der zweite Strom (A2) mit höherer Temperatur durch eigene Kanäle (3,4) zugeführt werden, dass diese Ströme so zirkulieren, dass ein Teil des mattenbildenden Stromes (A), nachdem er die Aufbauplattform (1) durchströmt hat, in den Kanal (3) des faserlösenden (A1) Stromes geleitet wird, um diesen Strom vorzuwärmen.
  6. Verfahren nach einem der Ansprüche 3,4 oder 5, dadurch gekennzeichnet, dass ein Teil des Stromes (A2) mit höherer Temperatur, welcher durch den Kanal (4) strömt, der Nachbehandlung der Matte dient und einen Teil des Stromes (B) ausmacht, welcher die Matte durchsetzt.
  7. Verfahren nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass die thermisch bindenden Fasern thermoplastische Fasern sind.
  8. Verfahren nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass die hergestellte Matte der Wärmeisolation (5a) in einem Bauelement (5) dient, wozu sie zwischen einer Aussenschicht (5a) und einer Innenschicht (5e) angebracht ist.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass als Innenschicht (5e) eine Gipsplatte angebracht ist.
  10. Vorrichtung zur Herstellung eines Faserproduktes, welche eine Kammer (6) für ein gasförmiges Medium umfasst mit einem Einlass mit einem Kanal (3,4) und einem Auslass, der durch eine Aufbauplattform (1) verschlossen ist, die fortbewegbar ist, ferner mit Mitteln (11,2) zum Zuführen von pflanzlichen Zellulosefasern und thermisch bindbaren Bindungsfasern in die Kammer (6) zwecks Bildung einer Matte auf der Aufbauplattform (1) mit Hilfe eines Stromes (A) eines gasförmigen Mediums aus dem Kanal (3,4), ferner mit Mitteln zum Erhitzen der thermisch bindenden Bindunsfasern, so dass diese die Zellulosefasern zu einer Matte verbinden, wozu die Vorrichtung ein Heizelement (7) für das gasförmige Medium (A2) umfasst, von dem ein Kanal (4) zur Kammer (6) führt, der die Bindefasern, welche sich bereits in der Kammer (6) befinden, in den bindenden Zustand zu bringen und, dass ferner am Einlass der Kammer (6) eine Zufuhrwalze (2) oder ein ähnliches Organ angebracht ist, dadurch gekennzeichnet, dass der Einlass der Kammer (6) mit einem ersten Kanal (3) für das gasförmige Medium (A1) versehen ist, der auf die Zufuhrwalze (2) oder auf das ähnliche Organ gerichtet ist, um die Fasern von derselben zu lösen und dass ein zweiter Kanal für das gasförmige Medium, gebildet aus dem Kanal (4), der mit dem Heizelement verbunden ist, sich zur Kammer (6) hin erstreckt an einer Stelle, an der die Strömungsrichtung des gasförmigen Mediums stromabwärts des Einlasses (3a) des ersten Einlasses (3) liegt.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass hinter der Kammer (6) in Richtung der Fortbewegung der Aufbauplattform (1) eine zweite Kammer (8) angeordnet ist, welche eine Aufbauplattform enthält, die dieselbe Plattform (1) ist, die aus der vorhergehenden Kammer kommt, wobei diese zweite Kammer (8) mit einem Kanal (9) versehen ist, welcher einen Strom (B) eines gasförmigen Mediums durch die Matte hindurch leitet.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass in Versorgungsrichtung des gasförmigen Mediums der erste Kanal (3) mit einer Sammelkammer (10) in Verbindung steht, welche an der der Kammer (6) gegenüberliegenden Seite der Plattform (1) angeordnet ist.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass der Kanal (4) zwischen dem Heizelement (7) und der Kammer (6) in den Kanal (9) abzweigt, welcher mit der zweiten Kammer (8) verbunden ist.
EP93910053A 1992-05-27 1993-05-26 Verfahren und vorrichtung zum herstellen von faserförmigen produkten Expired - Lifetime EP0601142B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI922421 1992-05-27
FI922421A FI94325C (fi) 1992-05-27 1992-05-27 Menetelmä ja laitteisto kuitutuotteen valmistamiseksi
PCT/FI1993/000224 WO1993024290A1 (en) 1992-05-27 1993-05-26 Method and apparatus for making a fibrous product

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EP0601142A1 EP0601142A1 (de) 1994-06-15
EP0601142B1 true EP0601142B1 (de) 1996-11-27

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EP (1) EP0601142B1 (de)
JP (1) JP3348788B2 (de)
AT (1) ATE145578T1 (de)
CA (1) CA2114213A1 (de)
DE (1) DE69306229T2 (de)
DK (1) DK0601142T3 (de)
ES (1) ES2095052T3 (de)
FI (1) FI94325C (de)
WO (1) WO1993024290A1 (de)

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FI93181C (fi) * 1993-09-09 1998-06-02 Valmet Paper Machinery Inc Menetelmä kuitutuotteen valmistamiseksi
WO1995010994A1 (en) * 1993-10-19 1995-04-27 The Procter & Gamble Company Method and apparatus for forming an intermittent stream of particles for application to a fibrous web
DE10151368A1 (de) * 2001-10-17 2003-05-08 Sai Automotive Sal Gmbh Fasermatte, daraus hergestelltes Formteil und Verfahren zu dessen Herstellung
WO2004035899A1 (en) * 2002-10-16 2004-04-29 Southern Wools Pty Ltd Method and apparatus for forming products of fibrous and cellulose material
US9296124B2 (en) 2010-12-30 2016-03-29 United States Gypsum Company Slurry distributor with a wiping mechanism, system, and method for using same
PL2658694T3 (pl) 2010-12-30 2017-11-30 United States Gypsum Company System i metoda dystrybucji zaprawy
US10076853B2 (en) 2010-12-30 2018-09-18 United States Gypsum Company Slurry distributor, system, and method for using same
KR101986713B1 (ko) 2010-12-30 2019-06-07 유나이티드 스테이츠 집섬 컴파니 슬러리 분배기, 시스템 및 이의 이용 방법
US9999989B2 (en) 2010-12-30 2018-06-19 United States Gypsum Company Slurry distributor with a profiling mechanism, system, and method for using same
BR112014007706A2 (pt) 2011-10-24 2017-04-18 United States Gypsum Co boot de descarga com múltiplas ramificações para distribuição de pasta fluida
PL2771156T3 (pl) 2011-10-24 2020-05-18 United States Gypsum Company Rozdzielacz przepływu do systemu dystrybucji zawiesiny
AR088522A1 (es) 2011-10-24 2014-06-18 United States Gypsum Co Molde para multiples piezas y metodo para construir un distribuidor de lechada
US10059033B2 (en) 2014-02-18 2018-08-28 United States Gypsum Company Cementitious slurry mixing and dispensing system with pulser assembly and method for using same

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DE2431180B1 (de) * 1974-06-28 1975-12-18 Bison-Werke Baehre Und Greten Gmbh & Co Kg, 3257 Springe Verfahren zum Herstellen von Spanplatten o.dgl
US4418031A (en) * 1981-04-06 1983-11-29 Van Dresser Corporation Moldable fibrous mat and method of making the same
US4474846A (en) * 1981-04-06 1984-10-02 Van Dresser Corporation Moldable fibrous mat and product molded therefrom
US5143680A (en) * 1990-05-17 1992-09-01 Nordson Corporation Method and apparatus for depositing moisture-absorbent and thermoplastic material in a substrate

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JP3348788B2 (ja) 2002-11-20
CA2114213A1 (en) 1993-12-09
ATE145578T1 (de) 1996-12-15
FI922421A0 (fi) 1992-05-27
DE69306229T2 (de) 1997-05-15
JPH06509529A (ja) 1994-10-27
EP0601142A1 (de) 1994-06-15
FI94325B (fi) 1995-05-15
FI94325C (fi) 1995-08-25
DE69306229D1 (de) 1997-01-09
DK0601142T3 (da) 1997-06-02
ES2095052T3 (es) 1997-02-01
FI922421A (fi) 1993-11-28
WO1993024290A1 (en) 1993-12-09

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