EP0601142B1 - Procede et appareil pour realiser un produit fibreux - Google Patents

Procede et appareil pour realiser un produit fibreux 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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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
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EP93910053A
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German (de)
English (en)
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EP0601142A1 (fr
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)
  • Preliminary Treatment Of Fibers (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (13)

  1. Procédé de fabrication d'un produit fibreux, dans lequel un courant (A) de milieu gazeux est utilisé pour former un matelas à partir de fibres cellulosiques à base de végétaux sur une plate-forme de formation (1) qui avance et le matelas est collé au moyen des fibres de liaison thermiquement collables entrelacées avec les fibres cellulosiques de telle façon que, lorsqu'elles sont amenées à un état de liaison par l'action de la chaleur, lesdites fibres de liaison collent les fibres cellulosiques les unes aux autres dans le matelas, caractérisé en ce que les fibres de liaison thermiquement collables entrelacées avec les fibres cellulosiques sont soumises à la chaleur qui les amène déjà à un état de liaison dans ledit courant (A) portant les fibres sur la plate-forme de formation (1) en réglant la température du courant de manière suffisamment élevée.
  2. Procédé selon la revendication 1, dans lequel les fibres sont amenées dans le courant (A) du milieu gazeux au moyen d'un rouleau d'alimentation (2) ou analogue, caractérisé en ce que les fibres sont dégagées ou libérées du rouleau d'alimentation (2) ou analogue au moyen d'un premier courant (A1) de milieu gazeux qui est, après cela, complété par un second courant (A2) de milieu gazeux à une température supérieure, à la suite de quoi la température du courant combiné (A) de milieu gazeux produit par lesdits premier et second courants (A1, A2) augmente de telle façon que les fibres de liaison sont amenées à un état de liaison.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, après avoir été formé au moyen du courant (A) de milieu gazeux sur la plate-forme de formation (1), ledit matelas est traité en outre en amenant un courant (B) de milieu gazeux pour traverser le matelas alors que le matelas est supporté du côté opposé à la direction de circulation du milieu gazeux.
  4. Procédé selon la revendication 3, caractérisé en ce que le traitement supplémentaire comprend l'augmentation de la densité du matelas au moyen d'une pression produite par le courant (B) de milieu gazeux contre le matelas.
  5. Procédé selon l'une quelconque des revendications 2, 3 ou 4, caractérisé en ce que ledit premier courant de milieu gazeux de libération des fibres (A1) et ledit second courant de milieu gazeux à température plus élevée (A2) sont amenés au long de leurs propres conduits (3, 4) et que les courants circulent de telle façon que, après la traversée de la plate-forme de formation (1), une partie du courant (A) utilisé pour la formation d'un matelas est amenée dans le conduit (3) du courant de libération des fibres (A1) pour préchauffer ledit courant.
  6. Procédé selon l'une quelconque des revendications 3, 4 ou 5, caractérisé en ce qu'une partie du courant de milieu gazeux à température plus élevée (A2) progressant dans le conduit (4) est amenée jusqu'au traitement suivant d'un matelas, grâce à quoi ce courant constitue au moins une partie du courant (B) de milieu gazeux qui traverse le matelas.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les fibres thermiquement collables sont des fibres thermoplastiques.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le matelas qui en résulte est installé en tant qu'isolation thermique (5c) dans un élément de construction (5) entre son revêtement extérieur (5a) et son revêtement intérieur (5e).
  9. Procédé selon la revendication 8, caractérisé en ce qu'une plaque de plâtre est installée pour former ledit revêtement intérieur (5e).
  10. Appareil pour fabriquer un produit fibreux, comprenant une chambre (6) destinée au milieu gazeux, ayant une extrémité d'entrée équipée d'un conduit (3, 4) et une extrémité de sortie qui est fermée par une plate-forme de formation (1) conçue pour pouvoir se déplacer, ledit appareil comprenant en outre un moyen (11, 2) pour amener des libres cellulosiques à base de végétaux et des fibres de liaison thermiquement collables dans la chambre (6) pour former un matelas sur la plate-forme de formation (1) au moyen d'un courant de milieu gazeux (A) fourni par le conduit (3, 4) ainsi qu'un moyen pour chauffer les fibres de liaison thermiquement collables de telle façon que, lorsqu'elles sont amenées à un état de liaison par l'action de la chaleur, lesdites libres collent les fibres cellulosiques les unes aux autres dans le matelas, l'appareil comportant un dispositif de chauffage (7) du milieu gazeux (A2), depuis lequel s'étend un conduit (4) allant vers la chambre (6) pour chauffer les libres de liaison déjà dans la chambre (6) jusqu'à l'état de liaison, et comprenant à l'extrémité d'entrée de la chambre (6) un rouleau d'alimentation (2) ou analogue, caractérisé en ce que l'extrémité d'entrée de la chambre (6) est pourvue d'un premier conduit (3) destiné au milieu gazeux (A1) qui s'étend vers ledit rouleau d'alimentation (2) ou analogue pour libérer les fibres qui s'y trouvent, grâce à quoi un second conduit destiné au milieu gazeux, qui est constitué du conduit mentionné ci-dessus (4) associé au dispositif dc chauffage, s'étend jusqu'à la chambre (6) à un emplacement qui, dans la direction du milieu gazeux, se trouve en aval d'un point d'entrée (3a) dudit premier conduit (3).
  11. Appareil selon la revendication 10, caractérisé en ce que, dans la direction d'avancement de ladite plate-forme de formation (1), ladite chambre (6) est suivie d'une seconde chambre (8) comprenant une plate-forme de support de matelas réalisée de préférence par la même plate-forme de formation (1) sortant de la chambre précédente, et ladite seconde chambre (8) est pourvue d'une canalisation (9) pour amener un courant (B) de milieu gazeux à traverser le matelas.
  12. Appareil selon la revendication 11, caractérisé en ce que, dans la direction d'amenée du milieu gazeux, ledit premier conduit (3) est en communication avec une chambre d'accumulation (10) située sur le coté de la plate-forme de formation (1) à l'opposé de ladite chambre (6).
  13. Appareil selon la revendication 12, caractérisé en ce que ledit conduit (4) qui se trouve entre le dispositif de chauffage (7) et la chambre (6) se ramifie pour former la canalisation (9) reliée à ladite seconde chambre (8).
EP93910053A 1992-05-27 1993-05-26 Procede et appareil pour realiser un produit fibreux Expired - Lifetime EP0601142B1 (fr)

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 (fr) 1992-05-27 1993-05-26 Procede et appareil pour realiser un produit fibreux

Publications (2)

Publication Number Publication Date
EP0601142A1 EP0601142A1 (fr) 1994-06-15
EP0601142B1 true EP0601142B1 (fr) 1996-11-27

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EP93910053A Expired - Lifetime EP0601142B1 (fr) 1992-05-27 1993-05-26 Procede et appareil pour realiser un produit fibreux

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

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FI93181C (fi) * 1993-09-09 1998-06-02 Valmet Paper Machinery Inc Menetelmä kuitutuotteen valmistamiseksi
DE69411578T2 (de) * 1993-10-19 1998-12-10 Procter & Gamble Verfahren und vorrichtung zur erzeugung eines ungleichmässigen stromes von partikeln zum auftragen auf eine faserstoffbahn
DE10151368A1 (de) * 2001-10-17 2003-05-08 Sai Automotive Sal Gmbh Fasermatte, daraus hergestelltes Formteil und Verfahren zu dessen Herstellung
WO2004035899A1 (fr) * 2002-10-16 2004-04-29 Southern Wools Pty Ltd Procede et dispositif pour former des produits de matiere fibreuse et cellulosique
US9999989B2 (en) 2010-12-30 2018-06-19 United States Gypsum Company Slurry distributor with a profiling mechanism, system, and method for using same
RU2599396C2 (ru) 2010-12-30 2016-10-10 Юнайтед Стэйтс Джипсум Компани Распределительная система для суспензии и способ
EP2658695B1 (fr) 2010-12-30 2018-06-13 United States Gypsum Company Distributeur de pâte, système et procédé pour son utilisation
US9296124B2 (en) 2010-12-30 2016-03-29 United States Gypsum Company Slurry distributor with a wiping mechanism, system, and method for using same
US10076853B2 (en) 2010-12-30 2018-09-18 United States Gypsum Company Slurry distributor, system, and method for using same
WO2013063080A2 (fr) 2011-10-24 2013-05-02 United States Gypsum Company Moule multipièce et procédé de fabrication d'un distributeur de boue
BR112014007712A2 (pt) 2011-10-24 2017-04-18 United States Gypsum Co divisor de fluxo para o sistema de distribuição de pasta fluida
CN103857499B (zh) 2011-10-24 2016-12-14 美国石膏公司 用于浆料分配的多腿排出靴
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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Publication number Priority date Publication date Assignee Title
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
US4474846A (en) * 1981-04-06 1984-10-02 Van Dresser Corporation Moldable fibrous mat and product molded therefrom
US4418031A (en) * 1981-04-06 1983-11-29 Van Dresser Corporation Moldable fibrous mat and method of making the same
US5143680A (en) * 1990-05-17 1992-09-01 Nordson Corporation Method and apparatus for depositing moisture-absorbent and thermoplastic material in a substrate

Also Published As

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

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