WO1985002366A1 - Procede ameliore de production de bois reconsolide - Google Patents
Procede ameliore de production de bois reconsolide Download PDFInfo
- Publication number
- WO1985002366A1 WO1985002366A1 PCT/AU1984/000240 AU8400240W WO8502366A1 WO 1985002366 A1 WO1985002366 A1 WO 1985002366A1 AU 8400240 W AU8400240 W AU 8400240W WO 8502366 A1 WO8502366 A1 WO 8502366A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strands
- web
- effected
- grain
- bonding
- Prior art date
Links
Classifications
-
- 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
- B27N1/00—Pretreatment of moulding material
-
- 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
- Australian Patent Specification 510,845 describes a reconsolidated wood product formed from at least one flexible open lattice work web of naturally intercon ⁇ nected wood strands generally aligned along a common grain direction, a substantial proportion of said strands being substantially discrete but incompletely separated from each other; said web having been consolidated' by compression whilst substantially maintaining the wood strands aligned along said common grain direction and said strands being bonded together to hold them in juxtapositions assumed pursuant to said consolidation.
- That patent specification also describes a process for forming a reconsolidated wood product from a flexible open lattice work web of naturally inter ⁇ connected wood strands, said web being formed by partially rending natural wood so that said strands are generally aligned along a common grain direction, a substantial proportion of said strands being sub- stantially discrete but incompletely separated from each other, said process comprising compressing the web to consolidate the strands whilst maintaining them such as to substantially extend in said original grain direction and bonding said strands together to hold them in juxtapositions assumed pursuant to said consolidation.
- the invention seeks to provide an improved process as above described and which permits a more economical use of bonding agent as used to bond the web strands together.
- the invention contemplates effecting the compression step as in the process of Specification 510,845, by a first pressing causing application of compressive force in one direction- transverse to the direction of extent of the grain of the web, at least partially releasing said compressive force, followed by a further pressing to effect compression either in said one direction or in a direction transverse thereto and also transverse to said direction of extent of the grain.
- Figure 1 is a diagram showing steps in the process as described in Patent Specification 510,845 for forming a reconsolidated wood product
- Figure 2 illustrates a method of adhesive appli ⁇ cation involving prior wax coating
- Figure 3 is a diagram showing a variation of the process shown in figure 2; and Figure 4 is a diagram illustrating a preferred method of effecting compression of webs to form a reconsolidated wood product in accordance with this invention.
- the resultant web shown at 14.in figure 1, is of flexible open lattice work form, individual strands maintaining the original grain direction of the wood.
- Adhesive is then applied to the webs 14 such as by immersion in a suitable liquid adhesive in a bath 16 as shown. After removal of excess adhesive (by means not shown) , a plurality of webs 14 are assembled together such that the individual webs in the assemblage are aligned in a common grain direction in a suitable mould 18.
- the assemblage of thus aligned webs is then consolidated in mould 18 such as by compression between the base of the mould and an upper press element 20 as shown, and the adhesive is cured, to form the final product 22.
- Product 22 is characterized in that it comprises a plurality of wood strands which remain naturally interconnected and which extend generally in the original grain direction of the wood.
- the strands are bound together by the adhesive but " are positioned in somewhat displaced relative locations as compared with the positions occupied in the original log 10.
- the product 22 has been found to be particularly satisfac ⁇ tory as it possesses good mechanical properties, due to the relatively small degradation of the original wood structure which is caused by the process, as well as good nailability and a generally pleasing appear ⁇ ance.
- FIG 2 there is shown dia- grammatically an additional process step in accordance with this invention and which is not shown in the process as just described in figure 1. That is to say, before the application of adhesive in the bath 16, the surfaces of the webs 14 are coated in a bath 100 containing a liquid wax as shown at step 102 in figure 2.
- a suitable liquid wax may be an emulsion of paraffin wa_ in water but other types of liquid wax may be used.
- the webs are removed therefrom, drained then dried as indicated at steps 103 and 104 in figure 2, and then passed to the aforementioned adhesive bath 16 as shown at step 105 in figure 2.
- the webs are removed, drained as shown at step 106 and then placed, for example, in the mould 18 (step 107) .
- the webs are then subjected to pressure as previously described, whereafter, with the pressure maintained, the adhesive is permitted to cure. These latter steps are represented at 108 in figure 2. Thereafter, the formed final product 22 is removed.
- wax coating as effected in bath 100 minimizes the amount of subsequent adhesive pick up so cutting down the required amount of adhesive.
- a further benefit from coating the webs 14 with wax is that the presence of wax thereon increases the resistance of the final product 22 to the ingress of water and thus in use enhances the durability of the resultant product.
- Figure 3 shows a variation of the process of figure 2 as applied in the case where the adhesive is a two-part composition.
- the adhesive may comprise a first component in the form of a solution of tannin powder in water and a second component in the form of a suitable activator such as hexamine dissolved in water.
- the tannin solution may be mixed with the wax to form the bath 109 shown in figure 3 into which, at the step 110 shown, the webs 14 are immersed then removed therefrom.
- the webs are then drained (step 111) prior to subsequent drying (step 112) , and passed to a bath 114 of the aforementioned activator (step 113) .
- FIG. 4 illustrates a preferred method in accordance with this invention for effecting the consolidation step in figure 1.
- the webs 14 are first laid in a first press 118, (the webs being viewed end-on in figure 4) .
- the webs 14 are then pressed from opposed sides in the press 118 by application of a pressure PI which may be sufficient to, for example, compress the webs to about 50 percent of the desired final density. Thereafter, the pressure is released so that some expansion of the material again occurs.
- a pressure PI which may be sufficient to, for example, compress the webs to about 50 percent of the desired final density.
- the dimension of the webs may be reduced to the dimension Dl shown.
- a second step re-expansion to a dimension D2 is permitted by release of pressure PI to a lesser pressure P2.
- the pressure P2 may be provided simply by releasing the hydraulic pressure so that only the weight of the compressing structure bears against the webs 14.
- the webs 14 may be removed and placed in a second press 120 which is arranged to permit application of a pressure P3 in a direction which is transverse to the initial direction of application of pressure in press 118.
- P3 may be arranged to be such as to complete the final product and bring it to the desired end density and thickness D3. Curing of the adhesive bonding the webs 14 together may be allowed to be completed in the press 120 whilst the pressure P3 is maintained.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08612224A GB2177709B (en) | 1983-11-23 | 1984-11-23 | Improved process for reconsolidated wood production |
DE8585900005T DE3482658D1 (de) | 1983-11-23 | 1984-11-23 | Verfahren zur formung eines wiederverfestigten holzerzeugnisses. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPG2513/83 | 1983-11-23 | ||
AUPG251383 | 1983-11-23 | ||
AU36766/84A AU569764B2 (en) | 1983-11-23 | 1984-11-23 | Two-step compression reconsolidated wood production |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1985002366A1 true WO1985002366A1 (fr) | 1985-06-06 |
Family
ID=25623723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1984/000240 WO1985002366A1 (fr) | 1983-11-23 | 1984-11-23 | Procede ameliore de production de bois reconsolide |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU569764B2 (fr) |
WO (1) | WO1985002366A1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0373725A2 (fr) * | 1988-12-16 | 1990-06-20 | Shell Internationale Researchmaatschappij B.V. | Agrégat fibreux cellulosique et procédé pour sa préparation |
DE3917452C1 (fr) * | 1989-05-30 | 1990-10-25 | Inter-Wood-Maschinen Gmbh & Co Kg, 8923 Lechbruck, De | |
WO2003037583A1 (fr) * | 2001-10-29 | 2003-05-08 | Shinji Gotou | Procede de production de bois d'oeuvre |
US7507360B2 (en) | 2005-11-29 | 2009-03-24 | Timtek, Llc | System and method for the preservative treatment of engineered wood products |
US7537669B2 (en) | 2004-09-22 | 2009-05-26 | Timtek Llc | System and methods for the production of steam-pressed long fiber reconsolidated wood products |
US7678309B2 (en) | 2006-11-28 | 2010-03-16 | Timtek, Llc | System and method for the preservative treatment of engineered wood products |
EP2344309A1 (fr) * | 2008-09-19 | 2011-07-20 | Style Limited | Produit manufacturé en bois et ses procédés de fabrication |
US8075735B2 (en) | 2004-09-22 | 2011-12-13 | Timtek, Llc | System and method for the separation of bast fibers |
US9931761B2 (en) | 2013-07-25 | 2018-04-03 | Timtek, Llc | Steam pressing apparatuses, systems, and methods |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1278961C (fr) * | 1986-12-24 | 1991-01-15 | Maxwell George Campbell | Methode et dispositif d'application d'un liant, et methode de fabrication d'unproduit de bois reconstitue |
AU622633B2 (en) * | 1987-12-18 | 1992-04-16 | Csr Limited | Improvements in or relating to the manufacture of particle board |
CA1329755C (fr) * | 1988-05-18 | 1994-05-24 | Robin David Sealey | Methode et appareil servant a la fabrication de produits en bois |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061819A (en) * | 1974-08-30 | 1977-12-06 | Macmillan Bloedel Limited | Products of converted lignocellulosic materials |
US4112162A (en) * | 1974-03-27 | 1978-09-05 | Svenska Utvecklingaktiebolatget | Structural chipboard wood beam |
AU2424377A (en) * | 1976-04-15 | 1978-10-19 | Commonwealth Scientific And Industrial Research Organisation | Reconsolidated wood product Commonwealth Scientific and Industrial Research Organization |
US4122236A (en) * | 1977-05-09 | 1978-10-24 | Holman John A | Artificial board of lumber and method for manufacturing same |
US4377649A (en) * | 1980-07-22 | 1983-03-22 | K. H. Freeman Pty. Ltd. | Wax compositions |
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 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2334954A1 (de) * | 1972-07-14 | 1974-01-31 | Raimund Jetzer | Verfahren zur herstellung von pressplatten |
-
1984
- 1984-11-23 AU AU36766/84A patent/AU569764B2/en not_active Ceased
- 1984-11-23 WO PCT/AU1984/000240 patent/WO1985002366A1/fr active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4112162A (en) * | 1974-03-27 | 1978-09-05 | Svenska Utvecklingaktiebolatget | Structural chipboard wood beam |
US4061819A (en) * | 1974-08-30 | 1977-12-06 | Macmillan Bloedel Limited | Products of converted lignocellulosic materials |
AU2424377A (en) * | 1976-04-15 | 1978-10-19 | Commonwealth Scientific And Industrial Research Organisation | Reconsolidated wood product Commonwealth Scientific and Industrial Research Organization |
US4122236A (en) * | 1977-05-09 | 1978-10-24 | Holman John A | Artificial board of lumber and method for manufacturing same |
US4377649A (en) * | 1980-07-22 | 1983-03-22 | K. H. Freeman Pty. Ltd. | Wax compositions |
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 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0196299A4 * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0373725A2 (fr) * | 1988-12-16 | 1990-06-20 | Shell Internationale Researchmaatschappij B.V. | Agrégat fibreux cellulosique et procédé pour sa préparation |
EP0373725A3 (fr) * | 1988-12-16 | 1991-11-06 | Shell Internationale Researchmaatschappij B.V. | Agrégat fibreux cellulosique et procédé pour sa préparation |
DE3917452C1 (fr) * | 1989-05-30 | 1990-10-25 | Inter-Wood-Maschinen Gmbh & Co Kg, 8923 Lechbruck, De | |
US5074945A (en) * | 1989-05-30 | 1991-12-24 | Inter-Wood-Maschinen G.M.B.H. & Co. Kg | Process and device for producing a coherent web from long slivers |
WO2003037583A1 (fr) * | 2001-10-29 | 2003-05-08 | Shinji Gotou | Procede de production de bois d'oeuvre |
US7537669B2 (en) | 2004-09-22 | 2009-05-26 | Timtek Llc | System and methods for the production of steam-pressed long fiber reconsolidated wood products |
US7537031B2 (en) | 2004-09-22 | 2009-05-26 | Timtek Llc | System and method for the manufacture of reconsolidated or reconstituted wood products |
US8075735B2 (en) | 2004-09-22 | 2011-12-13 | Timtek, Llc | System and method for the separation of bast fibers |
US7507360B2 (en) | 2005-11-29 | 2009-03-24 | Timtek, Llc | System and method for the preservative treatment of engineered wood products |
US7678309B2 (en) | 2006-11-28 | 2010-03-16 | Timtek, Llc | System and method for the preservative treatment of engineered wood products |
EP2344309A1 (fr) * | 2008-09-19 | 2011-07-20 | Style Limited | Produit manufacturé en bois et ses procédés de fabrication |
EP2344309A4 (fr) * | 2008-09-19 | 2012-03-28 | Style Ltd | Produit manufacturé en bois et ses procédés de fabrication |
US9931761B2 (en) | 2013-07-25 | 2018-04-03 | Timtek, Llc | Steam pressing apparatuses, systems, and methods |
Also Published As
Publication number | Publication date |
---|---|
AU569764B2 (en) | 1988-02-18 |
AU3676684A (en) | 1985-06-13 |
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