US3880975A - Continuous hardboard production - Google Patents

Continuous hardboard production Download PDF

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Publication number
US3880975A
US3880975A US320336A US32033673A US3880975A US 3880975 A US3880975 A US 3880975A US 320336 A US320336 A US 320336A US 32033673 A US32033673 A US 32033673A US 3880975 A US3880975 A US 3880975A
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United States
Prior art keywords
mat
web
press
thickness
moisture content
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Expired - Lifetime
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US320336A
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English (en)
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Lars-Erik Lundmark
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B PROJEKT INGF AB
INGENJORSFIRMA B-PROJEKT AB
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B PROJEKT INGF AB
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Publication date
Priority claimed from SE00599/72A external-priority patent/SE368681B/xx
Priority claimed from SE7206909A external-priority patent/SE375723B/xx
Application filed by B PROJEKT INGF AB filed Critical B PROJEKT INGF AB
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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

Definitions

  • a thin resin-bonded hardboard is produced by forming from a practically dry starting material containing a major part of defibrated ligno-cellulose plant substances and only a small percentage of synthetic resin binders a continuous, porously felted fiber mat which is continuously passed between a pair of cooperating hot press rollers under such conditions that the thickness of the mat is reduced to only a small fraction of the original one and the fibers are bonded together partly by the aid of the lignin and partly by the added binder in at least the surface layers of the rolled web
  • the web may he press-ro11ed to substantially its final thickness at once between the hot press rollers or be further treated in a hot plate press operating stepwise.
  • Hardboard is in itself a well known material nowa days consumed in great quantities. for instance within the packing industry and for building and interior fitting purposes. lts production requires a combined high pressure and high temperature treatment of porously felted fiber mats which so far has been successfully carried out only in flat plate presses. usually of the multiple opening type. Accordingly. hardboard has been available only in sheets or panels. the maximum size of which depends on the size of the flat plate press equipment used in the factory. For several obvious reasons this is highly objectionable. In order to overcome this deficiency considerable effort has been spent on finding out ways for splicing together hardboard sheets or panels. but this is. of course. no favorable solution of the basic problem.
  • a thin. continuous web is produced from a starting material containing at least a major part of defibrated lignocellulose plant substances and an admixture of resinous binding agents amounting to at most 7r of the weight of the final product by first causing said starting material to form a continuous. porously felted fiber mat having a certain but low moisture content, by subsequently feeding in said fiber mat between a pair of cooperating nip-forming press rollers. both of which have a hard surface and at least approximately the same diameter and both of which are heated to a minimum tempereature of 160 C.. at least within the envelope surface portions thereof engaging the fiber mat. said two press rollers being held together with such a high pressure that the thickness of the porously felted fiber mat.
  • the porously felted fiber mat entering between the hot press rollers will primarily become heated to a temperature at which the small but still active and sufficient amount of water in the mat will evaporate and. by being forced out backwards, will steam and soften the fibers so as to prepare them in a very favorable manner for the subsequent pressing operation.
  • the temperature of the fiber mat. now already considerably compressed. will be further increased. whereby the added resinous binding agents will become liquid and the lignin will be at least partly expelled from the ligno-cellulose fibers so as to distribute properly in the compressed mat and smear the softened fibers thereof. when the press roller nip is eventually reached.
  • the latter may be pre-heated before its entrance between the press rollers to a temperature of less than l(l0 C.. preferably to between 30 and C.
  • a temperature of less than l(l0 C.. preferably to between 30 and C may be controlled as required.
  • the admixture of resinous binding agents should amount to at most 10 71 of the weight of the final product. In practice. however. it has been found that half that percentage or even less is sufficient in most cases.
  • Thermosetting synthetic resin binders on a phenol. urea and/or isocyanide basis are preferred.
  • the starting material may include up to one third of other kinds of fibers, such as mineral fibers. e.g., asbestos, glass and roekwool fibers; animal textile fibers. e.g.. wool. cowhair and real silk; vegetable textile fibers. e.g.. cotton and cellulose wadding; artificial fibers, e.g.. rayon and other synthetic fibers; or mixtures of such other kinds of fibers.
  • mineral fibers e.g., asbestos, glass and roekwool fibers
  • animal textile fibers e.g. wool. cowhair and real silk
  • vegetable textile fibers e.g.. cotton and cellulose wadding
  • artificial fibers e.g.. rayon and other synthetic fibers
  • a certain small amount. up to l0 7: by weight. of a filler serving as a pigment. such as chalk. kaolin or coloring matter. may also be included. in most cases it is further recommendable to impregnate the fibers included in the starting material with small amounts
  • the two press rollers have at least approximately the same diameter and the latter must be many times greater than the thickness of the porously felted fiber mat to be pressed.
  • the surface temperature of the press rollers is another important factor. Although ]60 C. is a minimum temperature, it is in most cases advantageous to use higher temperatures. such as between 180 and 350 C., because higher temperatures generally permit a higher production speed. However, temperatures above the range just mentioned may easily cause burning of the web and should. therefore, be avoided. A top temperature of between 250 and 300 C. is preferred.
  • the two press rollers which preferably should be made of metal, such as steel, should be held together with a resilient pressure of at least 20 kilograms per centimeter active axial roller length. In some cases a roller pressure of approximately between 30 and 50 kilograms per centimeter active roller length has been found satisfactory, viz. when the pressed web is subsequently subjected to a further compression in a hot plate press. as will be described in the following. but in other cases it will be necessary to use roller pressures up to 250 kilograms per centimeter active roller length.
  • the fiber mat fed in between the two hot press rollers it is preferred to bring the fiber mat fed in between the two hot press rollers into immediate contact with both said rollers, because this will improve the heat transfer from the rollers to the mat.
  • the fiber mat may pass the press rollers resting on a thin wire cloth forming an endless conveyor.
  • the first one is to reduce, at once between the hot press rollers, the thickness of the fiber mat to at least the very close vicinity of that of the final product. In such a case it is usually advantageous to let the pressed web, while still hot, pass one or more pairs of cooperating smoothing and calibrating rollers having a surface temperature, at least within their active envelope surface portions, of between 150 and 200 C. in order to obtain a satisfactory product.
  • the second possibility is to impart to the fiber mat during its passage between the press rollers a reduced thickness exceeding that ofthe final product and to subsequently subject the continuous web thus formed and pre-pressed to a further, calibrating thickness reduction in at least one flat plate press having heated press plates.
  • said press being operated stepwise to subject one longitudinal portion after the other of the pre-pressed web leaving the press rollers to a high flat pressure and simultaneously to such an increased temperature that a complete binding of the fibers throughout the product by means of the lignin and other binding constituents of the web is achieved.
  • the first one of these two ways is simple but powerconsuming because of the required roller pressure. which is between 100 and 250 kilograms per centimeter active roller length. Furthermore. it requires a very large roller diameter. commonly up to 2 meters or more, if a high production speed is desired. This is true.
  • the temperature 5 also in the middle of the web is increased to at least 160 C. within the region of the press roller nip.
  • the minimum temperature in the middle of the web depends on several factors, viz. the web thickness or.
  • the period of time during which the fiber mat is in contact with the hot press rollers is dependent on the rate at which the thickness reduction of the fiber mat is effected, and this rate is determined by the circum ferential speed as well as by the diameter of the two press rollers.
  • each portion of the pre-pressed fiber web stay in the flat plate press for at least 2 seconds, and preferably for about 5 seconds, the most appropriate stay time being mainly dependent on the thickness of the final product and the temperature of the press plates.
  • the active surface portions of the press plates should be kept at a temperature of between 180 and C., preferably at about 250 C., and it has been found adequate to subject the prepressed web to a pressure of between 20 and 100 kilograms per square centimeter.
  • the fact that the web entering the hot plate press has been pre-pressed to a substantially fixed thickness, which is small in comparison with the original thickness of the porously felted fiber mat and only about twice the thickness of the final product, is very advantageous, because the movements or strokes of the press plates in the hot plate press may then be very small, whereby the working pace of the plate press may be kept fairly high or, in other words. the time needed for opening and closing the press at each operating cycle may be reduced to a minimum. At the same time, through-heating of the web takes only a short time. which fact also contributes to a high capacity of the plate press.
  • the continuous hardboard web is preferably conditioned and/or coated. and in accordance with this invention such conditioning or coating takes place while the web is still hot.
  • Conditioning may. for instance. include a controlled increase of the moisture content of the web. and coating may, for instance. also include facing or lami hating the web. on one or both sides. with a layer of plastics, veneer. fabric or even metal foil.
  • the continuous hardboard web received from the press station may be impregnated with a liquid impregnating agent. while it is still hot and. preferably. within an interval of time after the pressing operation when the temperature ofthe web is just sinking past l() C.. because it has been found that the web at that very moment has a pronounced sucking ability.
  • the impregnating agent may be any known preparation and. especially. bitumen or tar. Also fire retardants. fungicides and insecticides may be added to the final web by such subsequent impregnation instead of being included in the starting material. as indicated hereinbefore.
  • the fiber mat or the pre-pressed web is brought into immediate contact with hot press roller or press plate surfaces, the latter must. of course. be coated with a suitable releasing agent capable of withstanding the prevailing heat and preventing sticking of the mat or web to the metal surfaces.
  • a suitable releasing agent capable of withstanding the prevailing heat and preventing sticking of the mat or web to the metal surfaces.
  • Such releasing agent may also be used on any wire cloth accompanying the mat or web.
  • FIG. I illustrates a first form of plant for the production of a continuous hardboard web
  • FIG. 2 illustrates on an enlarged scale the pressing procedure proper taking place between the press rollers in FIG. I,
  • FIG. 3 illustrates a first modification of the production plant in FIG. 1.
  • FIG. 4 illustrates a second modification of the same.
  • numeral l designates an endless wire screen running over suitable conducting and driving rollers 2 and passing first through a fiber distributing apparatus 3. in which prepared dry fibers in air suspension are fed in as at 4 and caused to deposite on top of the wire screen 1 so as to form thereon a porously felted fiber mat of a predetermined thickness.
  • the apparatus 3 is preferably of the kind more closely described in US. Pat. No. 3.792.943.
  • the mat 5 has an approximate thickness of 25 millimeters and a weight of about 950 grams per square meter when leaving the apparatus 3, and that the fibers deposited on the wire screen 1 are dry-dcfibrated and subsequently further disintegrated fibers of a ligno-cellulose plant substance such as redwood or birch. to which has been added 4 '71 by weight of phenol resin glue and 2 if by weight ofa hydrofobic agent in the form ofa waxparaffin-emulsion.
  • the fiber mat 5 has. when leaving the apparatus 3. an approximate moisture content of 6 to 8 7E.
  • the porously felted fiber mat 5 is then passed through a pre-heating chamber 6, through which dried hot air having a temperature of about 70 C. is blown. whereby the moisture content of the mat will be reduced to about 4 7r and the temperature of the mat will be increased to the tmperature level within the chamber 6.
  • the wire screen I is deflected for return. whereas the fiber mat 5 S continues forwardly over a sliding plate 7 located immediately in front of the entrance to the nip between a pair of cooperating press rollers 8 and 9.
  • the lower one 9 of these press rollers is stationary mounted and driven with a circumferential speed of about meters per minute. which was also the running speed of the wire screen 1.
  • the upper roller 8 is loaded with an elastically yieldable pressure corresponding to about 200 kilograms per centimeter of active roller length.
  • the surface temperature of the two press rollers 8 and 9 is kept at about 270 C.. at least within those envelope surface portions thereof which engage the mat 5.
  • the distance between the outlet end of the pre-heating chambers 6 and the press rollers 8. 9 is relatively short. so that the temperature and moisture content of the mat 5 will not significantly change before the mat enters between the press rollers which both have a diameter of 2 meters.
  • the distance between the envelope surfaces of the two press rollers 8 and 9 in the nip between them will be almost exactly 1.0 millimeter. which means that the mat 5 is subjected to a very extensive thickness reduction between the press rollers and. in fact. comes out with a thickness very close to that of the final product.
  • a certain swelling or expansion of the pressed web will take place at the outlet from the press roller nip so that the thickness of the pressed web will be about l.l millimeters a small distance behind the press roller nip. This swelling is believed to result from the fact that certain gases are formed in the web when the latter is passing the press roller nip and these gases probably force their way out from the interior of the pressed web immediately after the press roller nip.
  • the web 5' is smoothed and calibrated to its final thickness by being passed through two pairs of cooperating rollers I0 having a diameter of 40 centimeters.
  • the rollers 10 are all heated to a surface temperature of about l75 C. and are kept together with a pressure of about kilograms per centimeter active roller length, i.e.. web width.
  • the rolled hardboard web 5" is subsequently passed through a conditioning chamber II where a suitable moisture content of the web is restored.
  • the web 5" may. as previously mentioned. be coated or impregnated. Such treatment may also take place before the web is passed between the pairs of rollers 10.
  • the preheated. porously felted fiber mat 5 will leave the sliding plate 7 and come into contact with the two hot press rollers 8 and 9 already a good distance in front of the press roller nip at I2 so as to be heated from said rollers during a progressive sive compression which takes a certain time. Because the fiber mat S is very much thicker than the pressed web 5'. Between the press rollers the mat 5 will first pass through a preparatory heating zone A and then enter into a pressing zone B. Already well before the end of the heating zone A. the fiber mat is supposed to have reached such a high temperature that its water contents has been almost completely evaporated. and the steam thus formed will obviously be driven out backwards towards the left in FIG.
  • the fibers in the mat are steamed and softened.
  • the temperature throughout the compressed fiber mat has reached such a level that the added resinous binding agents and also the lignin of the starting material are in a liquid state and become properly distributed.
  • the pressing zone B the final binding of the fibers takes place.
  • the porously felted fiber mat 5 is obtained in the same manner as described in connection with FIG. 1.
  • the fiber mat S is then passed through a pre-heating chamber 6 and between a pair of heated press rollers 8' and 9'.
  • the hot press rollers 8' and 9' have a diameter of 65 centimeters and are held together with an elastic pressure corresponding to about 35 kilograms per centimeter active roller length. or width of mat. They are both heated to a temperature of about l70 C. and their cir cumferential speed and. accordingly. the speed of the fiber mat. is kept at about 10 meters per minute. Under these conditions. the porously felted fiber mat 5 having an original thickness of approximately millimeters will be compressed between the press rollers to about twice the thickness of the final product. i.e.. to about 2 millimeters.
  • the outlet side ofthe press rollers there is on the outlet side ofthe press rollers arranged a running track l5 for a plate press 16 that is movable back and forth in the feeding direction of the pre-pressed web 5a leaving the press rollers 8' and 9'.
  • the active surfaces of the plates of the press l6 are kept at a temperature of about 250 C.
  • the press plates are hydraulically operated with a sufficient closing force to subject the portion of the pre-pressed web received between them to a pressure of about 80 kilograms per square centimeter.
  • the plate press moves towards the left when open and towards the right when closed. all in such a manner that the one longitudinal portion after the other of the pre-pressed web 50 is subjected to pressure and heat treatment during a period of about 5 seconds. From a practical point of view this means that the plate press must have a lenth of l.5 to meters.
  • the resulting product 5h leaves in this case the plant while moving continuously and with the same speed as the pre-pressed web 5a leaves the press rollers.
  • FIG. 4 shows a stationary plate press 20 which is used and placed at such a distance from the press rollers 8' and 9' that the pre-pressed web 511 can form a loop therebetween as indicated at 2
  • FIG. 4 shows. how the fiber mat passing between the hot press rollers 8' and 9' may be supported on a thin wire cloth 22 which is also used to carry the prepressed web in the loop 21 and through the plate press 20.
  • the wire cloth 22 forms an endless conveyor and is separated from the final product 511 immediately behind the plate press in order to return.
  • Such a wire cloth may. of course. be used also in the example shown in FIG. 3.
  • two or more such presses may be used and be passed by the web in succession during stepwise advance.
  • the web may in the first plate press be subjected to a high initial pressure and in the following plate press or presses be hardened under a more moderate pressure but still at a high temperature.
  • the ready-pressed web may by 5 means of additional rollers be imparted longitudinal or transverse corrugations. Preferably such additional treatment is carried out while the web is still at a high temperature. e.g.. above [00 C.
  • the pressing rollers 8 and 9 themselves may be shaped to corrugate the web during the pressing procedure proper.
  • An improved process for manufacturing a continuous flexible web of resin-bonded hardboard within the thickness range of between 015 and 3.0 millimeters which comprises a. providing an air suspension of a fiber-binder mixture containing a major part of defibrated ligno cellulose plant substances and less than l07r of a thermosetting synthetic resin binder.
  • each unseparated segment of the pre-pressed mat to a pressure of about 20 lOO kilograms per square centimeter for a short period of time while it is in said flat plate press to thus achieve the final thickness of the mat.
  • An improved process for manufacturing a continuous flexible web of resinbonded hardboard within the thickness range of between 0.15 and 3.0 millimeters which comprises a. providing an air suspension of a fiber-binder mixture containing a major part of defibrated lignocellulose plant substances and less than 1071 of a thermosetting synthetic resin binder.
  • each unseparated segment of the pre-pressed mat sequentially subjecting each unseparated segment of the pre-pressed mat to a pressure of about 20 100 kilograms per square centimeter for a short period of time while it is in said flat plate press to thus achieve the final thickness of the mat.
  • An improved process for manufacturing a continuous flexible web of resin-bonded hardboard within the thickness range of hctweenn 0.15 and 3.0 millimeters which comprises a. providing an air suspension of a fiber-binder mixture containing a major part of defibrated lignocellulose plant substances and less than 109? of a thermosetting synthetic resin binder.

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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)
  • Treatment Of Fiber Materials (AREA)
US320336A 1972-01-19 1973-01-02 Continuous hardboard production Expired - Lifetime US3880975A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE00599/72A SE368681B (enExample) 1972-01-19 1972-01-19
SE7206909A SE375723B (enExample) 1972-05-26 1972-05-26

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US3880975A true US3880975A (en) 1975-04-29

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BE (1) BE794261A (enExample)
CA (1) CA1021913A (enExample)
DE (1) DE2301852A1 (enExample)

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US4007076A (en) * 1974-12-30 1977-02-08 Masonite Corporation Post-press embossing of a consolidated man-made board
US4045531A (en) * 1974-06-28 1977-08-30 Bison-Werke Bahre & Greten Gmbh & Co. Kg Process for the production of chipboards and the like
FR2439082A1 (fr) * 1978-10-17 1980-05-16 Kast Casimir Gmbh & Co Kg Procede et installation pour la fabrication d'un materiau cellulosique fibreux
US4293509A (en) * 1978-12-15 1981-10-06 Bison-Werke Bahre & Greten Gmbh & Co. Kg Process for the production of chipboards, fiberboards, or like boards
US4299877A (en) * 1978-10-24 1981-11-10 Fletcher Wood Panels Limited Cladding and method of making same
WO1982001507A1 (en) * 1980-11-03 1982-05-13 Stanley H Brooks Self-supporting moldable fiber mat and process for producing same
US4357194A (en) * 1981-04-14 1982-11-02 John Stofko Steam bonding of solid lignocellulosic material
US4379808A (en) * 1980-06-30 1983-04-12 The Mead Corporation Sheet type forming board and formed board products
US4388138A (en) * 1980-08-11 1983-06-14 Imperial Chemical Industries Limited Preparing particleboard utilizing a vegetable wax or derivative and polyisocyanate as a release agent on metal press parts
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US4718981A (en) * 1985-08-23 1988-01-12 International Paper Company Bleached kraft paperboard by densification and heat treatment
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US6024905A (en) * 1997-07-17 2000-02-15 Hp-Chemie Pelzer Research & Development Ltd Apparatus and method for discontinuous manufacture of shaped composite article
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US6201224B1 (en) 2000-07-03 2001-03-13 Trus Joist Macmillan Limited Method of making a composite wood product from wood elements
US6368528B1 (en) 1998-10-30 2002-04-09 Masonite Corporation Method of making molded composite articles
US6652789B1 (en) * 1998-03-26 2003-11-25 Weyerhaeuser Company Composite veneer
US20060118238A1 (en) * 2004-12-08 2006-06-08 Hossein Borazghi Process and machine for producing lightweight thermoplastic composite products in a continuous manner
US20060151906A1 (en) * 2002-05-31 2006-07-13 Takuya Nishimura Method of producing woody formed-body and woody formed-body
US20070102113A1 (en) * 2005-11-04 2007-05-10 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
US20070111019A1 (en) * 2005-11-04 2007-05-17 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
WO2008015085A1 (de) * 2006-08-03 2008-02-07 Kraussmaffei Berstorff Gmbh Vorrichtung zur herstellung von materialbahnen
US20090077924A1 (en) * 2007-09-21 2009-03-26 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
WO2011036200A1 (de) * 2009-09-23 2011-03-31 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zur herstellung von kartonähnlichen faserplatten aus holzfasern
US20160229093A1 (en) * 2013-10-21 2016-08-11 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method
US10894338B2 (en) * 2015-12-23 2021-01-19 Goodhout Holding B.V. Method for the production of artificial wood board
CZ309273B6 (cs) * 2020-12-30 2022-07-13 Asipo s.r.o Zařízení pro výrobu rohoží z rostlinných materiálů
US11400681B2 (en) * 2017-02-22 2022-08-02 Giorgio Trani Process and apparatus for making a continuous web of fibrous material
US20220242007A1 (en) * 2016-03-21 2022-08-04 Bondcore öU Composite wood panels with corrugated cores and method of manufacturing same
US20250116107A1 (en) * 2023-10-05 2025-04-10 Carroll Anderson Joist shielding system

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DE2729687C3 (de) * 1977-06-30 1980-06-04 Bison-Werke Baehre & Greten Gmbh & Co Kg, 3257 Springe Verfahren zum Herstellen von Formwerkstucksrohlingen fur Sitzschalen, Verformungen aufweisende Abdeckplatten o.dgl
DE3172820D1 (en) * 1980-08-11 1985-12-12 Ici Plc Sheets or moulded bodies, methods for their manufacture and aqueous emulsions for use in their manufacture
JP5426480B2 (ja) * 2010-05-25 2014-02-26 パナソニック株式会社 長繊維板とその製造方法

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US4045531A (en) * 1974-06-28 1977-08-30 Bison-Werke Bahre & Greten Gmbh & Co. Kg Process for the production of chipboards and the like
US4007076A (en) * 1974-12-30 1977-02-08 Masonite Corporation Post-press embossing of a consolidated man-made board
FR2439082A1 (fr) * 1978-10-17 1980-05-16 Kast Casimir Gmbh & Co Kg Procede et installation pour la fabrication d'un materiau cellulosique fibreux
US4290988A (en) * 1978-10-17 1981-09-22 Casimir Kast Gmbh & Co. Kg Method for the manufacture of cellulosic fibrous material which can be pressed into moulded parts
US4382758A (en) * 1978-10-17 1983-05-10 Casimir Kast Gmbh & Co. Kg Apparatus for manufacturing cellulosic fibrous material which can be pressed into molded parts
US4299877A (en) * 1978-10-24 1981-11-10 Fletcher Wood Panels Limited Cladding and method of making same
US4293509A (en) * 1978-12-15 1981-10-06 Bison-Werke Bahre & Greten Gmbh & Co. Kg Process for the production of chipboards, fiberboards, or like boards
US4379808A (en) * 1980-06-30 1983-04-12 The Mead Corporation Sheet type forming board and formed board products
US4388138A (en) * 1980-08-11 1983-06-14 Imperial Chemical Industries Limited Preparing particleboard utilizing a vegetable wax or derivative and polyisocyanate as a release agent on metal press parts
WO1982001507A1 (en) * 1980-11-03 1982-05-13 Stanley H Brooks Self-supporting moldable fiber mat and process for producing same
US4431455A (en) * 1981-02-04 1984-02-14 Imperial Chemical Industries Plc Wax dispersions and their use in the manufacture of sheets or moulded bodies
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US5023027A (en) * 1984-02-03 1991-06-11 Casimir Kast Gmbh & Co., Kg Process for producing fibrous mats as a starting material for compression moulded articles
US4818342A (en) * 1985-08-23 1989-04-04 International Paper Company Heat treatment of paper products
US4718981A (en) * 1985-08-23 1988-01-12 International Paper Company Bleached kraft paperboard by densification and heat treatment
US4718982A (en) * 1985-08-23 1988-01-12 International Paper Company Densification and heat treatment of paperboard produced from SCMP and other sulfite pulps
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US5125812A (en) * 1987-12-16 1992-06-30 Kurt Held Apparatus for fabricating processed wood material panels
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US5209886A (en) * 1991-03-01 1993-05-11 Plascon Technologies (Proprietary) Limited Composition and method for the manufacture of a board
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US6103180A (en) * 1993-10-06 2000-08-15 Matec Holding Ag Method for producing a low odor, sound- and heat-insulation shaped element
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WO1998024615A1 (en) * 1996-12-02 1998-06-11 Owens Corning Molded insulation products and their manufacture using continuous-filament wool
US6319444B1 (en) * 1996-12-02 2001-11-20 Owens Corning Fiberglas Technology, Inc. Molded insulation products and their manufacture using continuous-filament wool
US6024905A (en) * 1997-07-17 2000-02-15 Hp-Chemie Pelzer Research & Development Ltd Apparatus and method for discontinuous manufacture of shaped composite article
US6652789B1 (en) * 1998-03-26 2003-11-25 Weyerhaeuser Company Composite veneer
US6368528B1 (en) 1998-10-30 2002-04-09 Masonite Corporation Method of making molded composite articles
US6201224B1 (en) 2000-07-03 2001-03-13 Trus Joist Macmillan Limited Method of making a composite wood product from wood elements
US20060151906A1 (en) * 2002-05-31 2006-07-13 Takuya Nishimura Method of producing woody formed-body and woody formed-body
US7429305B2 (en) * 2004-12-08 2008-09-30 Hossein Borazghi Process and machine for producing lightweight thermoplastic composite products in a continuous manner
US20060118238A1 (en) * 2004-12-08 2006-06-08 Hossein Borazghi Process and machine for producing lightweight thermoplastic composite products in a continuous manner
US20070102113A1 (en) * 2005-11-04 2007-05-10 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
US20070111019A1 (en) * 2005-11-04 2007-05-17 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
WO2008015085A1 (de) * 2006-08-03 2008-02-07 Kraussmaffei Berstorff Gmbh Vorrichtung zur herstellung von materialbahnen
US20090077924A1 (en) * 2007-09-21 2009-03-26 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
WO2011036200A1 (de) * 2009-09-23 2011-03-31 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zur herstellung von kartonähnlichen faserplatten aus holzfasern
CN102712100A (zh) * 2009-09-23 2012-10-03 西姆佩尔坎普机械设备制造有限责任公司和两合公司 以木纤维制造与纸板类似的纤维板的方法
US20160229093A1 (en) * 2013-10-21 2016-08-11 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method
US10843386B2 (en) * 2013-10-21 2020-11-24 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method
US10894338B2 (en) * 2015-12-23 2021-01-19 Goodhout Holding B.V. Method for the production of artificial wood board
US20220242007A1 (en) * 2016-03-21 2022-08-04 Bondcore öU Composite wood panels with corrugated cores and method of manufacturing same
US12157250B2 (en) * 2016-03-21 2024-12-03 Bondcore öU Composite wood panels with corrugated cores and method of manufacturing same
US11400681B2 (en) * 2017-02-22 2022-08-02 Giorgio Trani Process and apparatus for making a continuous web of fibrous material
CZ309273B6 (cs) * 2020-12-30 2022-07-13 Asipo s.r.o Zařízení pro výrobu rohoží z rostlinných materiálů
US20250116107A1 (en) * 2023-10-05 2025-04-10 Carroll Anderson Joist shielding system

Also Published As

Publication number Publication date
CA1021913A (en) 1977-12-06
BE794261A (fr) 1973-07-19
DE2301852A1 (de) 1973-07-26
JPS4883180A (enExample) 1973-11-06

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