WO2016141497A1 - Método para producir tableros mdf con nfc/mfc - Google Patents
Método para producir tableros mdf con nfc/mfc Download PDFInfo
- Publication number
- WO2016141497A1 WO2016141497A1 PCT/CL2015/050007 CL2015050007W WO2016141497A1 WO 2016141497 A1 WO2016141497 A1 WO 2016141497A1 CL 2015050007 W CL2015050007 W CL 2015050007W WO 2016141497 A1 WO2016141497 A1 WO 2016141497A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- nfc
- mfc
- weight
- refiner
- 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- 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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- B27N1/02—Mixing the material with binding agent
Definitions
- the present invention relates to a method for producing MDF boards (Medium Density Fiberboard), fiber and particle panels with the addition of nano and micro fibrillated cellulose (NFC / MFC).
- MDF boards Medium Density Fiberboard
- NFC / MFC nano and micro fibrillated cellulose
- Nano and micro fibrillated cellulose have interesting properties, such as low density, high chemical reactivity, high resistance and high transparency (Nogi et al .; 2009; Lee et al., 2009; P ákk or et al., 2007; Siró and Plackett, 2001), which has a high potential in industrial applications. Additionally, it has been reported that the mechanical properties of a wide range of polymers can be improved by composite blends.
- US patent application 2010/0285295 A1 “Wood adhesive containing reinforced additives for structural engineering produc ⁇ s”, refers to the use of nano cellulose (nano fibrillated cellulose (NFC), micro fibrillated (MFC), nano cellulose crystals (NCC) )) as additives in adhesives such as UF, polymer diphenylmethane (pMDI), melamine formaldehyde (MF), phenol-urea-formaldehyde (PUF), melamine-urea-formaldehyde (MUF), melamine-urea-phenol-formaldehyde (MUPF) , phenol-melamine-urea-formaldehyde (PMUF), adhesive protein, natural phenolic adhesives, unsaturated poly-esters and combination thereof.
- adhesives such as UF, polymer diphenylmethane (pMDI), melamine formaldehyde (MF), phenol-urea-formaldehyde (PUF), melamine
- the adhesive with the addition of nano cellulose can be used in structural board products (plywood, laminated veneer (LVL), particle board, fiber board, wafer board, laminated wood beams, structural composite wood, oriented particle board (OSB), fiber oriented wood (OSL) or parallel strand wood (PSL).
- structural board products pllywood, laminated veneer (LVL), particle board, fiber board, wafer board, laminated wood beams, structural composite wood, oriented particle board (OSB), fiber oriented wood (OSL) or parallel strand wood (PSL).
- nano cellulose is used as a resin additive, preparing a mixture of nano cellulose and resin.
- Patent application US 201 1/0293932 discloses the production of nano cellulose and how it can be used as an additive in adhesives. NCC is referred to as nano cellulose and it is not established how the adhesive can be used in the production of boards and / or panels, nor in MDF boards.
- Patent application US 201 1/0201755 "Thermoplastic nanocomposite base material don nanocrystalline cellulose (NCC)”, establishes the production of polymeric compounds of NCC-vinyl polymers, to be used as adhesives in medical applications.
- the replacement of UF by nano cellulose in MDF boards is not mentioned and is exposed to the NCC as a source of nano cellulose.
- Figure 1 describes the flow chart of the method of the invention of an MDF board production line, and indicates the possible points of addition of the NFC / MFC mixture in the process.
- Figure 2 shows a graph with IB values for boards with 10% resin replacement with 0.1% NFC / MFC and no addition of NFC / MFC. Detailed description of the invention:
- the present invention surprisingly found that 0 to 100% of the UF resin can be replaced with 0 to 100% NFC / MFC (weight percentages / resin weight), while maintaining or improving the properties of the panels and / or boards.
- the results can be obtained when the NFC / MFC and / or fillers are added together (for example, calcium carbonate, clays, gypsum, kaolin, alumina-silicates), without prior mixing with the resin and paraffin emulsions, to the fibers in the defibration / refining stage, after said stage or after the drying stage.
- cellulose microfibers are defined as particles with a size between 200 and 1000 mesh, that is, between 75 and 13 mm, without giving a clear definition of micro fibrillated or nano fibrillated cellulose.
- cellulose microfibres commercially purchased from CreaFill Fibers Corp, mixed with resin, with dimensions of 30 mm x 18 mm x 1 -2 mm, differing from the NFC / MFC were used as an additive used in the present invention which is obtained from commercial white pulp, mechanically treated in a refiner and with a width of less than 100 nm, which is a size much smaller than that used in US document.
- the microcellulose fibers are mixed with mineral nano particles and are treated with ultrasound, and then mechanically combined with the resin, which differs from the way in which the addition of the NFC / MFC of the present invention, since there is no mixture of the resin and the NFC / MFC before entering the process steps.
- the process consists of processing the wood 1, in a debarker 2, which provides wood chips 4 to the board and / or panel production plant, and bark 3 to the energy production center 23.
- Wood chips 4 are sent to cleaning and sorting processes to remove traces of bark and sand.
- the splinters pass to the splinter washing station 5 where materials whose density prevents them from floating are eliminated, mainly sand and metals.
- the clean chips are taken to a vaporizer silo 24. In the vaporizer silo 24, it is possible to remove the occluded air in the chips which makes the subsequent process of heat transfer in the digester 25 more efficient.
- splinters in the silo are heated with saturated steam at a pressure of 3 bar in order to standardize the temperature, homogenize the humidity and soften them making the removal of water and natural resins from the wood more effective. From the vaporizer silo they pass to the digester 25.
- the digester 25 consists of a vertical tube of variable diameter in which the chips are heated by saturated steam at a pressure of 7 to 9 bar, during a retention period of 2 to 7 minutes.
- the steam flow, pressure and temperature are controlled automatically.
- a variable speed feed exit screw at the bottom of the digester determines the volume of material flow to the defibrator / refiner 6.
- a paraffinic emulsion or wax 7 is injected into the feed screw and is correctly mixed with the fiber during the refining process, as it can also be injected into the blow line.
- the chips are transported to a feed screw towards the defibrator / refiner 6, where, as the name implies, the defibration of the material is carried out, where the fibers of the chips are separated.
- the shredder are two cutting discs. One disk is fixed, and the other is rotary. The separation between the stationary and rotating discs in the body of the defibrator produces the greatest impact on energy consumption during refining.
- the chips are introduced through the center of the fixed disk and are forced to enter through the narrow opening between the discs by centrifugal force.
- the vapor pressure in the disk housing blows the fiber through an adjustable blow valve, mounted on the shredder housing and then through a blow line to the drying duct. Part of the steam generated by the process, in a power plant 23, is transferred back to the top of the refiner / defibrator via steam return pipe 14 '.
- the adhesive is prepared by mixing the various components, such as resins, urea solution, catalyst (if present), colorants, fillers, etc. and water in a certain proportion with respect to weight, generally with a consistency of 50-80% by weight of resin, the rest is water, preferably 65% by weight of resin, the rest is water.
- Resin 8 is stored in ponds from where it is pumped to the mixing unit near the defibrator / refiner 6. It can be injected into the inlet (not shown in Figure 1) or the defibrator / refiner outlet 6 or the outlet dryer 9, in the event that the gluing process is dry (dry blending).
- Drying is carried out in a one or two stage dryer 9 and the heat source used consists of hot gases 14 'or hot air coming from the thermal plant through ducts in which it is mixed with fresh air to control the temperature.
- the fiber-vapor mixture from the defibrator / refiner 6 is driven to the dryer duct 9.
- the hot air stream evaporates moisture and conducts the fiber to the cyclones of the dryer, where the dry fiber is separated from the drying gas.
- the wet gas is expelled to the top of the cyclone.
- the fiber is transported to fiber silo 10.
- Dry fibers of the dryer 9, the recycle fibers of the former 11 and the fibers of the formation line and cleaning systems reach the fiber silo 10.
- the fiber silo 10 acts as a small storage lung between the fiber preparation area and the blanket formation line, feeding the press 13. Maintains a constant flow of fiber to the forming station, as well as it is ensured that the different types of fiber that are fed to the tank are mixed homogeneously before entering the formation process.
- a variable speed conveyor located at the bottom of the silo 10, controls the amount of fiber towards the former 11.
- a pneumatic separator (not shown in the figure) specially designed to separate and remove high density particles such as adhesive lumps, fiber knots, metal, etc., is located in the end of the discharge of the fiber silo 10. Here the amount of inferior quality material that goes to the fiber flow towards the forming stage is minimized. The fiber that comes from the fiber tank is transported to this unit by air flow, and then to the training station.
- the fiber that comes from the fiber silo 10 is introduced into a formation head 11 either by wind formation, or mechanical formation generating a continuous blanket, of different height according to the thickness and density of the board to be manufactured.
- the objective of the prepress is mainly to reduce the height of the mattress to deliver greater stability to the blanket and decrease the pressing time.
- the pressing process 13 either in multi-press or continuous presses.
- the process of consolidation of the board occurs, through the application of pressure and temperature, for a certain time, depending on the density of the board, thickness, and other process conditions.
- the pressed board crosses various work stations, where it is subjected to measurement operations 15, classification, cooling 16, storage 17 after cooling, sanding 18, formatting 20 and packaging 22. Where the cuts of formatting 21 and the powders of the sander 19, feed the power center 23.
- the NFC / MFC mixture can be added to the outlet of the digester 25, in the feed screw to the defibrator / refiner 6, after the output of the defibrator / refiner, called blow line 6, at this point it can be added to the fibers together with the NFC / MFC mixture one or more fillers, or at the exit of the dryer 9, at this point it can also be added to the fibers together with the NFC / MFC mixture, fillers together with resin or rosary the fiber blanket with a low consistency NFC / MFC mixture (the addition points are marked with a star in the figure).
- the resin is not mixed beforehand with the NFC / MFC, but they are added separately to the board production process.
- NFC / MFC can range from 0.5 to 50% (by weight of nano cellulose / weight of dry resin), preferably 1 to 30%.
- the resins used are mainly UF and MUF in amounts ranging from 5 to 25% by weight of dry-based resin of wood fibers (resin / water).
- the U / F molar ratios are 0.4 to 1, 4, with a solids content of 40 to 65%, strengthened or not with melamine (0.3 to 7% by weight of melamine) and with viscosities of 100 to 500 cps.
- catalysts can be used in the process, such as ammonium sulfate, ammonium chloride or ammonium nitrate, for the amine-based resin; which are added, previously mixed with the adhesive mixture.
- concentrations of the catalysts vary from 0.1 to 5% by dry weight with respect to the dry base resin.
- the fillers used correspond to calcium carbonate, clays, gypsum, kaolin and alumina-silicates, with calcium carbonate being preferred.
- concentrations of these agents range from 1 to 100% by weight and their dosage in the process is from 1 to 30% by weight with respect to the resin.
- the manufacturing conditions of the boards were as follows:
- Pressing time 2, min 45 sec., Which is equivalent to a pressing factor of 10.3 sec / mm.
- Density of the boards 500 - 540 kg / m 3 .
- the nano cellulose used on the board was produced from bleached Kraft pulp treated in a mill.
- Both boards use 1,215 gr. of fibers, the standard board uses 121.5 gr of UF resin, while the board with nano cellulose uses 109.4 gr. of UF resin (10% less resin) and 1, 09 gr. of solid NFC / MFC.
- the fibers were sprayed with the corresponding resins (standard and resin mixture with NFC / MFC), forming a blanket of fibers and pressed at 180 ° C for 4.5 minutes.
- Figure 2 shows the results for IB (for its acronym in English, Internal Bond), which measures the consolidation of the boards and / or panels, obtained for each board.
- the board of the invention (with 10% less resin, replaced by a mixture of NFC / MFC), has an IB of 0.128 N / mm 2 and the standard board, has an IB of 0.125 N / mm 2 . Proving that the IB values are similar but using a smaller amount of resin in the production of the boards.
- Example 2 10% and 20% resin are replaced with respective amounts of NFC / MFC of 0%, 1%, 2%, the effect on the IB of each board being measured.
- the nano cellulose used in the boards was produced from bleached Kraft pulp treated in a mill.
- the catalyst used in this example was ammonium sulfate.
- Example 2 shows the increases in IB from 0.156 N / mm 2 to 0.234 N / mm 2 when 20% resin has been replaced with 2% NFC / MFC.
- Example 3 shows the addition of fillers such as calcium carbonate, clay, gypsum, kaolin and alumina silicates, in conjunction with NFC / MFC to further reduce the use of resins in the production of MDF boards.
- fillers such as calcium carbonate, clay, gypsum, kaolin and alumina silicates
- Wood fibers and UF resin are used in the production of 2 different types of laboratory-scale MDF boards.
- the nano cellulose used on the board was produced from bleached Kraft pulp treated in a mill. In both cases the fibers were sprayed with the corresponding resins (standard and NFC / MFC mixture with PCC and resin), forming a blanket of fibers and pressed at 180 ° C for 4.5 minutes.
- the present invention decreases the amount of UF resin used in the production of MDF boards, obtaining MDF boards with an IB greater than that obtained from production without the addition of NFC / MFC.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CL2015/050007 WO2016141497A1 (es) | 2015-03-09 | 2015-03-09 | Método para producir tableros mdf con nfc/mfc |
BR112017019184-9A BR112017019184B1 (pt) | 2015-03-09 | 2015-03-09 | Método para produzir placas mdf, painéis de fibra e de partículas a partir de fibras celulósica |
US15/556,971 US10953568B2 (en) | 2015-03-09 | 2015-03-09 | Method for producing MDF boards with NFC/MFC |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/CL2015/050007 WO2016141497A1 (es) | 2015-03-09 | 2015-03-09 | Método para producir tableros mdf con nfc/mfc |
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WO2016141497A1 true WO2016141497A1 (es) | 2016-09-15 |
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PCT/CL2015/050007 WO2016141497A1 (es) | 2015-03-09 | 2015-03-09 | Método para producir tableros mdf con nfc/mfc |
Country Status (3)
Country | Link |
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US (1) | US10953568B2 (es) |
BR (1) | BR112017019184B1 (es) |
WO (1) | WO2016141497A1 (es) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108582337A (zh) * | 2018-05-30 | 2018-09-28 | 国际竹藤中心 | 一种竹材爆破分离与自重组方法 |
WO2019119164A1 (es) * | 2017-12-20 | 2019-06-27 | Investigaciones Forestales Bioforest S.A. | Sistema y método para la toma de muestra de fibras en forma continua |
US20210395949A1 (en) * | 2018-07-17 | 2021-12-23 | Suzano S.A. | Process for producing a nanocelullosic material comprising at least two stages of defibrillation of cellulosic feedstock and at least one intermediate fractioning stage |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023028067A1 (en) * | 2021-08-24 | 2023-03-02 | W.R. Meadows, Inc. | Fiberboard manuactured with cellulose nanofibrils as a binder and method of making same |
WO2023180807A1 (en) | 2022-03-23 | 2023-09-28 | Fiberlean Technologies Limited | Nanocellulose and resin make down processes and systems |
Citations (2)
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WO2009086141A2 (en) * | 2007-12-20 | 2009-07-09 | University Of Tennessee Research Foundation | Wood adhesives containing reinforced additives for structural engineering products |
WO2014124541A1 (en) * | 2013-02-15 | 2014-08-21 | Fpinnovations | Cellulose nanocrystals - thermoset resin systems, applications thereof and articles made therefrom |
Family Cites Families (8)
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FI20030490A (fi) * | 2003-04-01 | 2004-10-02 | M Real Oyj | Menetelmä kuitukoostumuksen valmistamiseksi |
EP1812762A1 (en) * | 2004-10-22 | 2007-08-01 | Force Technology | Method and device for drying a flow of biomass particles |
GB0425691D0 (en) * | 2004-11-23 | 2004-12-22 | Hepworth David G | Improved biocomposite material |
US20130248760A1 (en) * | 2012-03-26 | 2013-09-26 | Sundrop Fuels, Inc. | Particle for gasification containing a cellulose core with a coating of lignin |
US10695947B2 (en) * | 2013-07-31 | 2020-06-30 | University Of Maine System Board Of Trustees | Composite building products bound with cellulose nanofibers |
AU2014334089A1 (en) * | 2013-10-10 | 2016-04-21 | Basf Se | Lignocellulosic materials containing defibrillated cellulose |
WO2015077962A1 (en) * | 2013-11-28 | 2015-06-04 | Superl Technology Limited | Methods of powder coating and items to be powder coated |
CA2936607C (en) * | 2014-01-13 | 2023-01-03 | Basf Se | Method for the production of lignocellulose materials |
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2015
- 2015-03-09 WO PCT/CL2015/050007 patent/WO2016141497A1/es active Application Filing
- 2015-03-09 US US15/556,971 patent/US10953568B2/en active Active
- 2015-03-09 BR BR112017019184-9A patent/BR112017019184B1/pt active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009086141A2 (en) * | 2007-12-20 | 2009-07-09 | University Of Tennessee Research Foundation | Wood adhesives containing reinforced additives for structural engineering products |
WO2014124541A1 (en) * | 2013-02-15 | 2014-08-21 | Fpinnovations | Cellulose nanocrystals - thermoset resin systems, applications thereof and articles made therefrom |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019119164A1 (es) * | 2017-12-20 | 2019-06-27 | Investigaciones Forestales Bioforest S.A. | Sistema y método para la toma de muestra de fibras en forma continua |
CN108582337A (zh) * | 2018-05-30 | 2018-09-28 | 国际竹藤中心 | 一种竹材爆破分离与自重组方法 |
US20210395949A1 (en) * | 2018-07-17 | 2021-12-23 | Suzano S.A. | Process for producing a nanocelullosic material comprising at least two stages of defibrillation of cellulosic feedstock and at least one intermediate fractioning stage |
Also Published As
Publication number | Publication date |
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BR112017019184A2 (pt) | 2018-04-24 |
BR112017019184B1 (pt) | 2022-03-03 |
US20180169893A1 (en) | 2018-06-21 |
US10953568B2 (en) | 2021-03-23 |
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