WO2001066323A1 - Materiau forme a base de bois et procede de fabrication correspondant - Google Patents
Materiau forme a base de bois et procede de fabrication correspondant Download PDFInfo
- Publication number
- WO2001066323A1 WO2001066323A1 PCT/JP2001/001792 JP0101792W WO0166323A1 WO 2001066323 A1 WO2001066323 A1 WO 2001066323A1 JP 0101792 W JP0101792 W JP 0101792W WO 0166323 A1 WO0166323 A1 WO 0166323A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic resin
- woody
- fibrous
- wood
- mat
- Prior art date
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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
- B27N1/02—Mixing the material with binding agent
-
- 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
- B27N3/28—Moulding or pressing characterised by using extrusion presses
-
- 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
- B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles
-
- 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
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- 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
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled 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
- B27N3/10—Moulding of mats
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
Definitions
- the present invention relates to a lightweight wooden molded product and a method for producing the wooden molded product.
- thermoplastic resin is melted by an extruder or a heat melting type kneader. It has been proposed that wood powder or the like is put into a container and the kneaded mixture is extruded or a mixture of a wood material and a thermoplastic resin chip or pellet is hot pressed to obtain a molded product. Fine wood materials such as wood powder and crushed waste paper are used as wood materials. Such a wooden molded article is useful as a building board or a furniture material.
- thermoplastic resin When a woody material is put into a thermoplastic resin melted under high temperature and high pressure as described above, various sugars, lignin, etc. originally possessed by the woody material are eluted into the molten thermoplastic resin. Due to the kneading action under high pressure by a screw such as a cruster, the eluted components are dispersed in the thermoplastic resin. As a result, the thermoplastic resin component is degraded, and a predetermined hardness and strength cannot be obtained, and further, toughness cannot be obtained, resulting in brittleness. In addition, weather resistance is deteriorated and chalking is caused by exposure to ultraviolet rays outdoors. Causes troubles.
- thermoplastic resin chips or pellets are mixed with a wood material
- the resin is difficult to disperse uniformly even when the wood material and the resin are mixed at room temperature, and when waste paper crushed material is used as the wood material.
- the specific surface area increases, a large amount of resin as a binder is required, and as a result, the density is increased, and the existing structural materials using plywood and OSB, which have excellent strength characteristics using thermosetting resins.
- Lightweight alternative to wood There is a problem that it is difficult to obtain a quality molded body.
- the present invention provides, as a means for solving the above-mentioned conventional problems, a wooden molded product obtained by molding a raw material mixture Mx obtained by mixing a wooden material W and a fibrous and / or ribbon-shaped thermoplastic resin R. is there.
- the fibrous and / or ribbon-shaped thermoplastic resin R is desirably mixed with the wood material W in a heated and molten state. Further, as the fibrous and / or ribbon-shaped thermoplastic resin R, one produced from thermoplastic resin waste can be used. Further, the woody material is preferably a flake-shaped piece of wood.
- a raw material mixture Mx obtained by mixing a woody material W and a fibrous and / or ribone-like thermoplastic resin R is press-molded.
- a template placed directly or on a conveyor moving a raw material mixture containing a woody material and a fibrous and / or ribbon-shaped thermoplastic resin in a predetermined direction.
- the mat is formed by spraying on the top, and the mat is press-formed.
- the mat may be embossed on one or both sides of the mat after press molding to form an uneven pattern.
- the raw material mixture is prepared by mixing a fibrous and / or ribone-like thermoplastic resin with the woody material in a heated and molten state, in which case the extruder die orifice is used.
- the thermoplastic resin heated melt is discharged in a fibrous state, and mixed with the wood material in a molten state of the fibrous thermoplastic resin discharged. It is desirable that the woody material is continuously supplied to and mixed with the molten thermoplastic resin discharged from one or both sides.
- the molten thermoplastic resin is discharged into a fibrous form from the orifice of the die of the extruder, and is stretched and thinned by hot air pressure and Z or cold air pressure.
- the material can be mixed with the wood material in the molten state.
- the orifices of the dies of the extruder are desirably arranged in a plurality of rows or a plurality of rows, and the dies can be arranged in a plurality of stages. Generally, the diameter of the orifice of the above die is 0.2-2.
- 1 to 28 show one embodiment of the present invention.
- FIG. 1 is an explanatory view of a mixing process of a fibrous thermoplastic resin and a woody material.
- FIG. 1 is an explanatory view of another mixing step of a fibrous thermoplastic resin and a woody material.
- FIG. 3 is an explanatory side view of the former.
- FIG. 4 is an explanatory side view of a former according to another embodiment.
- FIG. 5 is an explanatory side view of a former according to still another embodiment.
- FIG. 6 is an explanatory diagram showing a state in which the fibrous thermoplastic resin is entangled with the woody material and fused.
- FIG. 7 is an explanatory side view of another former.
- FIG. 8 is an explanatory diagram of a process for producing a wooden molded product using a template, a hot-hole single press, and a cold roll press.
- FIG. 9 is an explanatory diagram of a wooden molded body manufacturing process using a hot roll press and a cold roll press.
- FIG. 10 is an explanatory front view before pressing.
- FIG. 11 is an explanatory side view of the pressed state.
- FIG. 12 is an explanatory view of the molded mat structure after the heating and pressing.
- FIG. 13 is an explanatory view of a heating press device.
- FIG. 14 is an explanatory view of a cold press device.
- FIG. 15 is an explanatory diagram of the extrusion and discharge steps of the thermoplastic resin.
- FIG. 16 is an explanatory sectional view of the orifice of the die.
- FIG. 17 is an explanatory diagram showing a state in which orifices are arranged in a die.
- FIG. 18 is an explanatory diagram showing a state in which the fibrous thermoplastic resin is entangled with the woody material and fused.
- FIG. 19 is an explanatory diagram of the entangled state of raw materials using a die in which a plurality of rows of orifices are juxtaposed.
- FIG. 20 is an explanatory diagram of a raw material entangled state using a dice having three rows of orifices arranged side by side.
- FIG. 21 is an explanatory diagram of thinning of a thermoplastic resin discharge product by hot air and cold air.
- FIG. 22 is an explanatory view of another stretching and thinning by hot air and cold air.
- FIG. 23 is an explanatory view of drawing and thinning in which hot dies and cold air are blown out by providing dies in a stepwise manner.
- FIG. 24 is an explanatory view of a heating process of a wooden material.
- Figure I5 is an illustration of the raw material mixing process in which a wood material supply conveyor and dies are provided in multiple stages.
- FIG. 26 is an explanatory view of another embodiment of the wooden material supply conveyor.
- FIG. 27 is an explanatory view of still another embodiment of the wood material supply conveyor.
- FIG. 28 is an explanatory view of still another embodiment of the wooden material supply conveyor. Explanation of reference numerals
- Examples of the wood material W used in the present invention include wood chips, strands, wood flour, wood wool, wood fiber bundles, wood pulp, and the like.
- the woody material W may be obtained from, for example, scraps and waste materials generated when constructing, remodeling or dismantling a wooden building. Such scraps and wastes has been conventionally mainly incinerated, C 0 2 gases that cause global warming occurs according to the incineration. However, as mentioned above, if the scraps and waste materials are reused as wood material W, the environmental burden can be reduced.
- a flake-shaped piece of wood for example, using a ringman made by Pearlman, is made into a thin piece shape with a width of 0.5 to 20 mm, a length of 1 to 50 mm, and a thickness of 0.1 to 5 mm. More preferably, the width is 0.5 to 10 mm, the length is 4 to 35 mm, and the thickness is 0.1 to 2.5 mm, and particularly, the width is 4 to 8 mm and the length is 20 to 25 mm.
- a piece of wood with a thickness of 0.5 to 1 mm is preferred.
- waste wood can be used as the wood material W.
- reconstructed and demolition wood can be easily made into a flake-shaped piece of wood due to flare force.
- the water content of the wood chips is dried with a dryer to less than 5%.
- thermoplastic resin R used in the present invention examples include polyethylene, Propylene, ethylene-propylene copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, fluororesin, thermoplastic acrylic resin, thermoplastic
- thermoplastic resins such as polyester, thermoplastic polyamide, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, and waste materials of the thermoplastic resins.
- the thermoplastic resin R is used in the form of a fiber and / or a ribbon.
- the fibrous thermoplastic resin R is, for example, a melt spinning method in which a melt of the thermoplastic resin is discharged from an orifice of a die of an extruder, and a crushed waste material of a thermoplastic resin product is ground into a fibrous shape by a refiner. It is produced by a method and a method of defibrating waste materials of thermoplastic resin products with a refiner, etc. It is desirable to use waste materials as thermoplastic resin even in the melt spinning method. Particularly useful as a source of the above-mentioned thermoplastic resin R waste materials are agricultural thermoplastic sheets, packaging thermoplastic bags, thermoplastic fiber products, home appliance cabinets, and car bumpers that generate a large amount of waste materials. , PET bottles and the like.
- the ribbon-shaped thermoplastic resin R is produced, for example, by shredding a thermoplastic resin film with a shredder, and the thermoplastic resin film is made of the thermoplastic resin waste material or the thermoplastic resin waste material. It is desirable to use what has been melted and formed into a film by an extrusion method or a force render method.
- the fibrous and / or ribbon-shaped resin of the present invention may be a mixture of two or more kinds of fibrous and / or ribbon-shaped thermoplastic resins R, or may be a melt-spun or thermoplastic resin. When a film is formed by melting, two or more thermoplastic resins R may be mixed and melted.
- thermoplastic resin R is formed into a fibrous and / or ribbon form as in the present invention and used as a binder for the wood material W, a mixture of two or more kinds can be used, so that the time and effort for sorting can be omitted.
- the waste material of the woody molded product of the present invention is cut, crushed, or defibrated into a woody material W, which can be reused again as a raw material for the woody molded product or a wood cement board.
- the recyclability is very high, and the recyclability of the thermoplastic resin R is greatly improved indirectly.
- a large amount of recycled thermoplastic resin R can be consumed.
- the woody molded product of the present invention includes, for example, an antioxidant such as a water repellent, a waterproofing agent, an antioxidant, and an antioxidant. , Coloring agent, viscosity reducing agent, adhesion improver, etc., and compatibilization especially when two or more thermoplastic resins R are mixed and melt-spun or melted to form a film An agent may be added.
- an antioxidant such as a water repellent, a waterproofing agent, an antioxidant, and an antioxidant.
- Coloring agent viscosity reducing agent, adhesion improver, etc., and compatibilization especially when two or more thermoplastic resins R are mixed and melt-spun or melted to form a film An agent may be added.
- the wooden material W and the fibrous and / or ribbon-shaped thermoplastic resin R are mixed.
- the mixing ratio is usually about 30:70 to 90:10 by weight ratio of wood material W: fibrous and / or ribbon-shaped thermoplastic resin R.
- the fibrous and / or ribbon-shaped thermoplastic resin R is entangled with the woody material W, so that the mixing can be performed uniformly and the mixture is difficult to separate.
- a large amount of air can be contained in the mixture by incorporating air during mixing.
- thermoplastic resin R melt is extruded continuously or intermittently into a fibrous shape from the orifice of the die of the extruder (1). Air-cooled, or if necessary, cooled through a water-cooled cooler (2) as shown in Fig. 1 and added to the wood material W filled in a mixer (3) such as an Eirich mixer. The thermoplastic resin R melt is extruded into a fibrous form from the orifice of the die of the extruder (1) as shown in FIG.
- thermoplastic resin R melt there are methods such as intermittently opening and closing the orifice (IB) of the die (1A) by providing rotating blades inside the die (1A).
- the fibrous thermoplastic resin R maintains the heat-softened state, and Since the fibrous thermoplastic resin R is mixed with the material W, the fibrous thermoplastic resin R is unevenly entangled with the wood material W and is in a fused state.
- the ribbon-like thermoplastic resin R when the above-mentioned woody material W and the ribbon-like thermoplastic resin R are mixed, it is preferable to mix the ribbon-like thermoplastic resin R in a heat-softened state. Also in this case, as shown in FIG. 6, the ribbon-shaped thermoplastic resin R is unevenly entangled with the woody material W and fused.
- the fibrous or ribbon-shaped thermoplastic resin R is unevenly entangled and fused with the woody material W, a large amount of air is taken in when forming the mat M, and a slight amount of Even if the air inside the mat is eliminated, there will be many voids in the molded mat M ', and the resulting product will be lighter.
- a wood material W is passed through a former (4) and a skewer-shaped roll (5) called Reika 1 is used to provide a uniform thickness. Further, the woody material W is blown off by a drawing roll (6) called a spreader roll, and a thermoplastic resin R melt immediately above the drawing roll (6).
- An extruder (1) for dispersing the wood material W, or the extruder (1) is arranged between a pair of left and right drawing rolls (6) (6), and the wooden material W which has been blown away is thermoplastically dispersed. Spread and supply the resin R melt from one or both sides and entangle it. The thermoplastic resin R is still softened and is placed on a compression roll press conveyor (7) or a template placed on the conveyor (7). (10) There is a method in which the raw material mixture ⁇ is sprayed thereon and press-molded. As shown in FIG. 5, a plurality of orifices may be arranged in one or more rows in the dice (1A).
- the raw material mixture ⁇ ⁇ obtained by mixing the thermoplastic resin melt with the woody material W is once sprayed on a conveyor (7 ⁇ ) as shown in FIG. 7, and is squeezed by a skewered roll (5 ⁇ ) of a former (4 ⁇ ).
- the thickness of the wood material W which has become uniform to some extent and is evenly matted with a drawing roll (6 mm), is unraveled and crushed again.
- Spread and spread on the compression roll press conveyor (7) which leads to the mat. It is possible to eliminate the non-uniformity of the specific gravity of the mixture ⁇ by forming the mat once through this former (4 ⁇ ).
- the moisture acts as a binder, so that even if the finely-pulverized thermoplastic resin R is used, the wood material W adheres evenly to the wood material W.
- the woody material W and the thermoplastic resin R are difficult to separate when flung away, but when hot pressing is performed later as in the present invention, there is a problem that water vapor is generated from the woody material W during heating.
- the water content of the wood chips W must be low. If the thermoplastic resin R is in the form of powder or chips, the wood material W and the thermoplastic resin R are separated and blown off because the water content is the only binder. However, even if the mat is formed, the thermoplastic resin R does not become a uniform mat and the strength after molding cannot be expected.
- thermoplastic resin R needs to be in the form of fibers and / or ribbons, and is entangled with the wood material W, so that the wood material W and the thermoplastic resin R do not separate and fly away. Absent.
- the mat may be hot-pressed by a press device, and the obtained formed mat may be cooled by passing through a cold roll press, as shown in FIG.
- a large number of the templates (10) are arranged and moved on a conveyor (7).
- Spraying the raw material mixture Mx on top and forming the mat M improves productivity.
- the mat M formed on the template (10) is in a fluffy state, so that the mat is prevented from collapsing, and is compressed before hot pressing to facilitate heat transfer to the mat M during hot pressing.
- the method of spraying the raw material mixture Mx directly onto the belt of the conveyor (7) to form the mat M can be operated continuously, resulting in high productivity, low equipment cost and economical efficiency. is there. In this case, it is desirable to cool the molded mat M * with cold rolls (13C, 14C).
- productivity is further improved by adopting a method in which units are stacked in a multi-stage manner on the normal cart (25) as shown in FIG. 11 and pressed together, and the entire cart (25) is carried into the heating chamber.
- the ⁇ ) surface of the template is usually flat, but the template (10) may be provided with an uneven pattern.
- a cold roll press 13C, 140
- an uneven pattern is formed on one or both sides of the molding mat ⁇ 'as shown in FIG. 9 at the subsequent stage of the cold roll press (13C, 140). Placing the embossed rolls (16A, 16B) attached makes it possible to obtain a plate-like wooden molded product having an uneven pattern on one or both surfaces.
- the template (10) surface is formed into an arc-shaped or wavy curved surface, or three or more pairs of hot-holes are arranged in an arc-shaped or wavy shape.
- a wooden shaped article can be obtained.
- the mat may have a multilayer structure such as two layers or three layers.
- a fine wood material for example, a mixture of wood chips and wood flour
- a coarse wood material for example, a mixture of wood chips and wood flour
- a wood piece it is possible to obtain a light, plate-like wooden molded article having a dense structure, a smooth surface, a rough core layer, a cushioning property, and the like.
- the above mixture is filled in a box having an inner surface having a desired shape, and the upper mold having the desired shape is pressed from above and heated. It is common to do it.
- heating is applied by electric heating, high frequency heating, electromagnetic wave heating, heating using steam heat as a heating medium, or the like.
- the fiber or ribbon-shaped thermoplastic resin R contains a large amount of air inside, and the air in the fiber or ribbon-shaped thermoplastic resin R is largely removed even by hot-pressing as shown in Fig. 12.
- the fibrous or ribbon-shaped thermoplastic resin R is melted, many voids S are formed in the molded product, and a lightweight molded product is obtained.
- it since it has high strength and good nail holding power, it is useful for roof base materials.
- a melt blow method as a preferable method for producing the woody molded article of the present invention.
- thermoplastic resin R discharge is shortened by the hot air pressure and / or cold air pressure.
- a method of stretching and thinning Such a shortened or thinned fibrous thermoplastic resin R can be obtained by mixing various thermoplastic resin waste materials without separation, even if the thermoplastic resins R are compatible with each other. Irrespective of, phase separation does not occur when mixed with woody material W.
- the wood material W and the thermoplastic resin R in a molten state are mixed.
- thermoplastic resin R melt-kneaded by an extruder in a vertical direction is discharged from an orifice of a die at a high pressure, and continuously and / or intermittently. From both sides or one side Supply wood material W.
- the mixing ratio is usually about 20:80 to 90:10 by weight ratio of wood material W: fibrous thermoplastic resin R.
- the fibrous thermoplastic resin R in the molten state is stretched and thinned by hot air and / or cold air pressure, and is produced by the accompanying flow (negative pressure region) generated by the hot air and / or cold air. Since it is entangled with material W, mixing can be performed uniformly. When cold air is used, a large amount of wind pressure can be applied, and stretching can be promoted.
- molten fibrous thermoplastic resin R refers to a fibrous thermoplastic resin R in a molten state to the extent that it is stretched and thinned by hot air pressure and / or cold air pressure. It may contain a solidified product by cooling.
- a tip-shaped or pellet-shaped thermoplastic resin is supplied from a root end hopper (41) of an extruder (40) as shown in FIG. 15 and the thermoplastic resin is fed into the extruder (40).
- R is extruded into the die (42) while being heated and melted, and is discharged in a fibrous form from the orifice (43) of the die (42) as shown in FIG.
- hot air outlets (44) are opened on both sides of the orifice (43) of the die (42), and hot air from a hot air supply path (45) is blown obliquely downward, thereby stretching the thermoplastic resin R discharged material. Shrink.
- the hot air outlet (44) has a slit shape along the orifice (43). It is.
- the diameter of the die (4 mm orifice (43), 0, is preferably 0.2 to 2.0 mm.
- thermoplastic resin R melt, especially thermoplastic resin Fresh materials contained in the molten material of waste materials are liable to clog the orifice (43). If the value exceeds 2.0, the thermoplastic resin R is not sufficiently thinned even if the discharged material is stretched. It becomes difficult to mix uniformly with material W.
- the diameter of the orifice (43) is 0.2 to 2.0 mm
- the diameter of the fibrous thermoplastic resin R after expansion and contraction is 0.05 to 0. 8 mm
- the orifice (43) is not clogged, and the discharge of the fibrous thermoplastic resin R can be uniformly mixed with the wood material W.
- the wooden material supply conveyors (46, 46) are arranged on both sides immediately below the orifice (43) group of the dies (42), and the supply is performed.
- the woody material W on the conveyor (46, 46) is sprayed by the spreading rolls (47, 47) arranged at the end of the supply conveyor (46, 46), and the woody material W is lowered from the orifice (43) of the die (42). And is mixed with the fibrous thermoplastic resin R discharged by hot air pressure.
- thermoplastic resin R discharged material is kept in a molten state by being kept warm by the hot air, and the wood material is formed into an accompanying flow (negative pressure region) formed on both sides of the thermoplastic resin R discharged by the hot air pressure. W is sucked, and as a result, the wood material W, particularly wood piece which is a flake wood material, is spun around the thermoplastic resin R discharge material and is stretched and thinned.
- the thermoplastic resin R in the molten state is uniformly mixed with the molten thermoplastic resin R and the woody material W. Due to its own weight, stretching and thinning are promoted.
- the mixture Mx is deposited in a mat shape on the template (10) being conveyed on the conveyor (48). Then, the deposited mixture Mx is sent to a roll press or a forming press (not shown) and pressed into a plate.
- a plurality of orifices (43) may be arranged in a plurality of rows, for example, two rows in the dice (52).
- the thermoplastic resin discharged from the orifice (43) group in both rows is stretched and thinned by hot air pressure and oriented so as to approach each other.
- Wood material W is supplied and mixed before the R discharges coalesce.
- both the thermoplastic resin R discharge materials are united in a state where the thermoplastic resin R discharge material is entangled with the wood material W, and the thermoplastic resin R molten material and the wood material W are uniformly mixed.
- the mixture Mx accumulates in a mat on the template (10) on the conveyor (48).
- the supply amount (discharge amount) of the thermoplastic resin R melt is doubled, and the supply amount of the wood material W is also doubled accordingly. Since the conveying speed of the plate (10) is also doubled, the production amount is doubled.
- FIG. 20 shows a case in which a plurality of orifices (43) are arranged in three rows in the dice (62).
- the thermoplastic resin R ejected from the central orifice (43) group is not stretched and thinned by the hot air of the die.
- the thermoplastic resin R discharged from the orifices (43) on both outer sides is stretched and thinned, and the woody material W is supplied to the thermoplastic resin R discharged so stretched and thinned.
- the thermoplastic resin R melt is entangled with the woody material W, it is united from both sides with the thermoplastic resin R discharged at the center, which is not stretched much. Therefore, the mixture Mx of the thermoplastic resin R melt and the woody material W forms a two-layer state and deposits in a mat form on the template (10) on the conveyor (48).
- the supply amount (discharge amount) of the thermoplastic resin R melt is tripled. Therefore, the supply amount of the wood material W is also tripled, and the transport speed of the template (10) is also tripled. Can be tripled.
- thermoplastic resin R discharged material can be drawn and thinned by cold air in addition to the hot air of the dice.
- ramps (46A, 46A) are connected from the ends of the wood material W supply conveyors (46, 46) on both sides, respectively, and cool air is placed under the ramps (46A, 46A).
- An introduction path (46B, 46B) is provided, and cool air is blown from the cold air introduction path (46B, 46B) to the thermoplastic resin R discharge.
- the thermoplastic resin R ejected by the cold air itself is cooled and solidified and is not stretched much, but the orifice of the die is heated and the thermoplastic resin R ejected is in a molten state.
- the stretching of the discharged material is promoted between the orifice and the cool air.
- a large amount of wind can be provided, and it is economical and efficient.
- the elongation and thinning of the thermoplastic resin R discharge can be adjusted. This is only the cold air that can give a large amount of wind pressure that is incomparable with the hot air of the die, This is because stretching can be easily managed.
- the discharge part for discharging the cold air into a plate shape as shown in the figure it can be used as a guide for introducing the woody material W, and can be more efficiently entangled with the thermoplastic resin R discharge material.
- hot air supply paths (45A, 45A) are provided between the hot air of the die (42) and the cool air under the inclined table (46A, 46A), and the hot air supply paths (45A, 45A) are provided. Then, hot air may be further blown to stretch and narrow the thermoplastic resin R discharge. In this case, since the thermoplastic resin R discharge material keeps heat just before the cold air hits, it can be stretched even thinner.
- the dies (42A, 42B, 42C) are arranged in steps, and the cool air introduction passages (46B, 46B) are provided on both lower sides of the central high die (42A).
- a cold air introduction passage (46B, 46B) can be provided to increase the load capacity or to make the load a three-layer structure.
- thermoplastic resin R melt it is preferable to heat and supply the woody material W in order to maintain the dispersibility of the thermoplastic resin R melt. If the wood material W is heated, the entanglement (fusion) of the thermoplastic resin R melt becomes strong, and separation of the wood material and the thermoplastic resin R melt can be prevented.
- the supply conveyor (46, 46) is used as a net conveyor, and the hot air is heated by the hot air circulation device (49, 49) as shown by the arrow. While circulating, the woody material W on the supply conveyor (46, 46) is heated. In this case, the woody material W is heated and dried efficiently. Further, it is preferable that the entire apparatus is housed in the heat insulation room (50).
- the mixture Mx of the thermoplastic resin R and the woody material W deposited in a mat form on the template (10) is pressed immediately after the deposition, the mixture Mx is still heated and needs to be reheated. And production efficiency and thermal efficiency are improved. If it takes a long time to press, hot press is performed, but it is melted every time, so the thermal efficiency is much better than that of mixing in a cold state. Furthermore, as shown in FIG. 5, by providing the wood material supply conveyor (46) and the dies (42) in multiple stages, the production efficiency can be greatly improved.
- the wood material supply conveyor (46, 46) can be swung right and left, and as shown in Fig. 27, the wood material supply conveyor (46, 46) and the die (42) can be swung.
- a uniform mat M can be formed on the template (10) on the conveyor (48).
- the swinging type wood material supply conveyor, the wood material supply conveyor and the die capable of reciprocating in the width direction may be a multi-stage type as shown in FIG.
- the wood material supply conveyor (46, 46) is arranged orthogonal to the conveyor (48), the dies (42) are arranged in the horizontal direction, and the supply conveyor (46, 46) and the dies ( 42) may be reciprocated in the width direction. Also in this case, a uniform mold M can be formed on the template (10) on the conveyor (48).
- the supply conveyor and the dies may be of a multi-stage type arranged side by side.
- the cold pressing device, the cold press device, the cold rolling roll If it is formed by a press or the like, and it is in a cooled state after a short time from the deposition, it is formed by a heating press, a hot roll press, etc., and the obtained molded mat M ′ is formed by a cold press, a cold roll. It is cooled and fixed by a press or the like.
- the waste polypropylene sheet is heated and melted, and the resin is intermittently extruded into a fibrous form from an extruder (1) as shown in Figs. 1 and 2, and the wood chips W (size 4 to 8) in a heated mixer (3) ⁇ X 20 ⁇ 25 Awake X 0.5 ⁇ 1 ⁇ ) and stirred and mixed for 1 minute.
- Resin The mixing ratio of wood fibrous thermoplastic resin R 5 0 wt%, a wood W 5 0 wt 0/0.
- the thermoplasticity of the fibrous polypropylene Since the resin R is added to and mixed with the wood piece W while maintaining the heat-softened state, the fibrous polypropylene thermoplastic resin R is unevenly melted around the wood piece W as shown in FIG. The fibrous thermoplastic resin R is also entangled between the wood pieces.
- the raw material mixture Mx is drawn by the former (4) shown in FIG.
- the raw material mixture Mx is again blown off by the feed roll (6) and supplied directly to the conveyor (7) of the front end compression roll press (13A, 14A) of the pair of upper and lower roll presses (13, 14) shown in FIG.
- the mat M is heated by the roll presses (13, 14) heated by hot air in the pair of upper and lower heating chambers (15).
- Forming is performed by pressurizing to 180 to 220 ° C with a roll press (13B, 14B) and press forming (press pressure: 6 MPa).
- the wood pieces W are bound together by the fibrous thermoplastic resin R melt as shown in FIG. 1, but as described above, the fibers are unevenly distributed.
- the fibers are entangled with each other, and the fibers are entangled between the pieces of wood, so that even after pressing, the circumference of the pieces of wood is sealed with thermoplastic resin R.
- the waste polyethylene sheet was shredded and subdivided into a ribbon.
- the mixture Mx was sprayed on a template (10) moving on a roll conveyor (7) as shown in FIG. 8 using a former (4) similar to that in Example 1 to form a mat M.
- the mat M is slightly compressed in the thickness direction with a compression roll press (13A, 14A) and shaped, and then heated at 120-170 ° C with a hot roll press (13B, 14B) (6M Pa). did. Thereafter, the molded mat M 'was cooled by a cold-hole single press (13C, 14C) (5 MPa, roll interval 12. Omm) to produce a plate-shaped sample 2.
- Non-woven fabric waste made of polyester fiber was roughly pulverized with a single-shaft shredder and then unraveled with a double-disc refiner to obtain recycled fibers.
- Wood chips (Example 1) 25% by weight
- Wood flour (Example 2) 25% by weight
- the mixture B was sprayed on a template (10) as shown in Fig. 8 to form a mat M, and the mat M was cast together with the template (10) on a hot roll press (250-280 ° C). 13B, 14B) to gradually reduce the thickness of the mat M and tighten it.
- the maximum press pressure was 6 MPa and the roll gap was 12. Onk.
- a plate-shaped sample 3 was manufactured.
- the waste polypropylene resin is pulverized and melted, extruded into a fiber form from the extruder (1) shown in FIG. 2, and while maintaining the softened state by heating, a piece of wood W similar to that of Example 1 is formed in the form shown in FIG.
- Example 1 The mixture A of Example 1 was sprayed on a template (10) to form a mat M, and the unit consisting of the template (10) and the mat was spread as shown in FIG. 1 1 After stacking them in multiple stages (10 stages to 15 stages), load them in the specified number of stages, and then carry them into the clamping device (24), where the lower base (24A) of the clamping device (24) is placed.
- the units stacked between the upper base (24B) and the upper base (24B) are pressed together, and the fixing arm (240) of the upper base (24B) is fixed to the fixing flange (24D) of the lower base (24A) as shown in FIG. Clamp by rod (24E)
- the clamping pressure shall be 6 MPa.
- the multi-stage mat pressed by the pressing device (24) is placed on a trolley (25), and is introduced into the heating chamber with the trolley (25). Heat for 0-90 minutes. After heating, the carriage (25) is removed from the heating chamber together with the trolley (25), left at room temperature for 2 to 3 hours while in the pressed state, cool the sheet temperature to about 100 ° C, and release the pressed state after cooling. The molded mat M 'was taken out and a plate-shaped sample 5 was produced.
- Example 1 The mixture A of Example 1 was sprayed on the template (10) to form a mat M, and the template (10) was further placed on the top of the mat M, and was composed of the template (10) and the mat M.
- the unit was inserted into a multi-stage heating press (30) as shown in FIG. 13 and pressed while heating at a temperature of 180 to 250 ° C. and a pressure of 6 MPa. After that, the depressurized and molded Matsu M 'is put into a cold press (31) as shown in Fig. 14 together with the upper and lower templates (10), and cooled while shaping at 0.5 MPa. Sample 6 was prepared.
- the mixture for the front and back layers is sprayed on a template (10) moving on a roll conveyor using a two-head former, and the mixture for the core layer is sprayed thereon, and the front and back layers are further spread thereon.
- the mixture was sprayed to form three layers of mat M.
- the mat M having the three-layer structure was heated and pressed at a temperature of 120 to 170 ° C. in the same manner as in Example 2.
- the plate sample 7 having the three-layer structure was manufactured by cooling.
- Table 1 shows the physical properties of the plate-shaped sample 17.
- the diameter of the orifice (43) of the die (52) is 1.5 mm
- the hole interval is 5 mm
- 500 holes are arranged in a row. Place.
- Polypropylene waste is pulverized, heated and melted in an extruder, supplied to a die (52), and discharged into a fibrous form from an orifice (43) of the die (52).
- the polypropylene R melt discharge is stretched and thinned by blowing hot air at 200 ° C.
- the fiber diameter after stretching was about 0.5 mm.
- flakes of thinned wood are used and sprayed from the supply conveyor (46, 46) on both sides
- a roll (47) supplies the above-mentioned polypropylene R molten discharge to the above-mentioned polypropylene R molten discharge, and the polypropylene R melt discharge is entangled with the wood piece W and uniformly mixed on the mold plate (10) on the conveyor (48). Deposited in mat form.
- the mixing ratio of the above wood chips and polypropylene was 6: 4 by weight.
- the deposit of the mixture Mx was formed into a plate shape by a rolling roll press, and further cooled by a cold roll press to obtain a woody body.
- the sample of the above-mentioned wooden molded article had a width of 100 cm, a length of 180 cm, a thickness of 12 mm, a bending strength of 340 kgf / cm 2 , and an absolute dry specific gravity of 0.71.
- thermoplastic resin R In the apparatus shown in Fig. 22, hot air at 200 ° C is blown in two stages in the hot air supply path (45, 45A) using the same dies, thermoplastic resin R, wood material W, etc. as in Example 8. Thereafter, cold air at 20 ° C. was blown from the cold air introduction passage (46B) to draw and narrow the thermoplastic resin R discharge.
- the nozzle diameter was 1.5 mm, and the fiber diameter of the thermoplastic resin R discharged after stretching was about 0.1 cm.
- thermoplastic resin R, wood material W, etc. as in Example 8, the hot air from the hot air supply path (45) of the dies was stopped and only cold air at 20 ° C.
- the sprayed thermoplastic resin R discharged from the cold air introduction path (46B) was stretched and thinned.
- the nozzle diameter is 5 cm in diameter, and the fiber diameter of the thermoplastic resin after drawing R is about 0.6 mm.
- the heat press device at 200 ° C (press pressure 6 O MPa), followed by shaping with a cold press (press pressure 0.6 MPa) to obtain a wooden molded body.
- the bending strength of the plate was 360 kg / cm 2 , and the absolute dry gravity was 0.78
- the bending strength of a wood compact produced by hot pressing by mixing a polypropylene resin R waste material (powder) and wood chips W was 160 kgf / cm 2.
- the strength is lower than that of the example, it is considered that the reason for this is that the dispersion of the crushed polypropylene resin R waste material is uneven, and there is a portion where no resin component exists between the woody materials W.
- thermoplastic resin which easily entangles with the wood material is used as a binder for the wood material, the wood material and the fibrous or ribbon-like thermoplastic resin are separated. It is possible to mix evenly and to blow in air during mixing.
- the woody material is supplied to the fibrous thermoplastic resin in a heat-melted state, dispersibility in the woody material of the thermoplastic resin can be obtained, and a wooden molded article having high strength can be obtained.
- the fibrous thermoplastic resin is stretched and thinned by hot air pressure and / or cold air pressure in a heated and melted state, the mixing of the woody material and the thermoplastic resin is performed more uniformly, and a further high strength woody material is obtained. A molded article is obtained.
- the wood molded article of the present invention is useful for building boards and furniture materials such as wall boards, floor boards, floor boards, chair seat boards, chair back boards and table boards, and interior materials such as automobile door trims and tonneau boards.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001241055A AU2001241055B2 (en) | 2000-03-07 | 2001-03-07 | Woody formed article and method for producing the same |
US10/220,965 US7037960B2 (en) | 2000-03-07 | 2001-03-07 | Woody formed article and method for producing the same |
AU4105501A AU4105501A (en) | 2000-03-07 | 2001-03-07 | Woody formed article and method for producing the same |
EP01912168A EP1262293A4 (en) | 2000-03-07 | 2001-03-07 | FORM BODY ON WOOD BASED AND METHOD FOR THE PRODUCTION THEREOF |
CA002402003A CA2402003A1 (en) | 2000-03-07 | 2001-03-07 | Woody formed article and method for producing the same |
KR1020027011666A KR20020081404A (ko) | 2000-03-07 | 2001-03-07 | 목질 성형체 및 그 제조방법 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000061792 | 2000-03-07 | ||
JP2000/61792 | 2000-03-07 | ||
JP2001046442A JP3563704B2 (ja) | 2000-03-07 | 2001-02-22 | 木質成形体の製造方法 |
JP2001/46442 | 2001-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001066323A1 true WO2001066323A1 (fr) | 2001-09-13 |
Family
ID=26586922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/001792 WO2001066323A1 (fr) | 2000-03-07 | 2001-03-07 | Materiau forme a base de bois et procede de fabrication correspondant |
Country Status (7)
Country | Link |
---|---|
US (1) | US7037960B2 (ja) |
EP (1) | EP1262293A4 (ja) |
JP (1) | JP3563704B2 (ja) |
KR (1) | KR20020081404A (ja) |
AU (2) | AU4105501A (ja) |
CA (1) | CA2402003A1 (ja) |
WO (1) | WO2001066323A1 (ja) |
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US10307984B2 (en) | 2014-03-31 | 2019-06-04 | Ceraloc Innovation Ab | Composite boards and panels |
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US10710103B2 (en) | 2017-04-28 | 2020-07-14 | Senninger Irrigation, Inc. | Serviceable sprinkler with a nutating deflector assembly |
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- 2001-03-07 WO PCT/JP2001/001792 patent/WO2001066323A1/ja not_active Application Discontinuation
- 2001-03-07 KR KR1020027011666A patent/KR20020081404A/ko not_active Application Discontinuation
- 2001-03-07 CA CA002402003A patent/CA2402003A1/en not_active Abandoned
- 2001-03-07 US US10/220,965 patent/US7037960B2/en not_active Expired - Fee Related
- 2001-03-07 EP EP01912168A patent/EP1262293A4/en not_active Withdrawn
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10307984B2 (en) | 2014-03-31 | 2019-06-04 | Ceraloc Innovation Ab | Composite boards and panels |
US10967608B2 (en) | 2014-03-31 | 2021-04-06 | Ceraloc Innovation Ab | Composite boards and panels |
US11541630B2 (en) | 2014-03-31 | 2023-01-03 | Ceraloc Innovation Ab | Composite boards and panels |
Also Published As
Publication number | Publication date |
---|---|
JP3563704B2 (ja) | 2004-09-08 |
EP1262293A4 (en) | 2005-07-13 |
CA2402003A1 (en) | 2001-09-13 |
US7037960B2 (en) | 2006-05-02 |
JP2001322106A (ja) | 2001-11-20 |
KR20020081404A (ko) | 2002-10-26 |
EP1262293A1 (en) | 2002-12-04 |
US20030111775A1 (en) | 2003-06-19 |
AU4105501A (en) | 2001-09-17 |
AU2001241055B2 (en) | 2005-03-10 |
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