WO2003074242A1 - Procede de production d'objets moules en fibres biodegradables - Google Patents
Procede de production d'objets moules en fibres biodegradables Download PDFInfo
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- WO2003074242A1 WO2003074242A1 PCT/JP2003/002547 JP0302547W WO03074242A1 WO 2003074242 A1 WO2003074242 A1 WO 2003074242A1 JP 0302547 W JP0302547 W JP 0302547W WO 03074242 A1 WO03074242 A1 WO 03074242A1
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- Prior art keywords
- powder
- vegetable
- weight
- fibrous
- biodegradable
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2927—Rod, strand, filament or fiber including structurally defined particulate matter
Definitions
- the present invention relates to a method for producing a biodegradable fibrous molded article, and particularly to mixing a vegetable fibrous powder and a vegetable binder powder, adding water thereto, and then molding. And a method for producing a biodegradable fibrous formed article.
- plastics made from chemically synthesized products can be molded freely, are strong, can be mass-produced, and have many advantages.However, when they are discarded, they cannot be biodegraded in the soil or burned This causes social problems such as the generation of harmful substances such as dioxin.
- biodegradable plastics produced using hydrocolloids such as polysaccharides as the main raw materials include, for example, those using starch and synthetic plastics as the main raw materials (Chemistry and Biology V o 1.33, No 3, 159-166, 199 5) (Bioscience and Industri-Vo 1.52, No. 10; 975-800, pp. 199-4) ), And those using cellulose and chitosan as main raw materials (Chemical and Industrial Sciences, Vol. 1.43, No. 11, pages 85-87, 1990).
- Japanese Unexamined Patent Publication (Kokai) No. 11-501490 discloses an industrial product having a fiber matrix reinforced and a starch-bound cell matrix, wherein the cell matrix is a starch-based binder. And comprising fibers substantially uniformly dispersed within the starch-bound cell matrix, wherein the fibers have an average aspect ratio of about 25: 1 or greater and the concentration of inorganic aggregate filler is It is about 20% by weight or more based on the starch-bound cell matrix, and the thickness of the starch-bound cell matrix is about 1 cm or less.
- Japanese Patent Application Laid-Open No. 2000-314424 discloses that at least konya powder, vegetable fiber powder and water are mixed and kneaded, and the mixture is poured into a desired mold. Later, there is described a method for producing a molded product, which is characterized by performing pressure and heat molding.
- Biodegradable plastics produced using hydrocolloids such as polysaccharides as main raw materials have a problem that the production cost is significantly higher than plastics made from chemically synthesized products.
- the industrial product disclosed in Japanese Patent Publication No. 11-15050950 is suitable for mass production by injection molding because the fibrous material, which is a raw material, has large dimensions and a large amount of water is mixed with the raw material. There is no problem.
- the method for producing a biodegradable fibrous molded article disclosed in Japanese Patent Application Laid-Open No. 2001-33442 354 has a problem that it is not suitable for mass production because it is pressurized and heated.
- the present invention has been made in view of the above problems, and has as its object to provide a method for producing a biodegradable fibrous molded article capable of inexpensively mass-producing a biodegradable fibrous molded article. .
- a vegetable fiber powder is mixed with a vegetable binder powder, which is a mixture of a starch powder and a gum powder, and the mixture is mixed with water to form a vegetable fiber material.
- a method for producing a biodegradable fibrous molded article which comprises forming a material and molding the vegetable fibrous molding material.
- a mixture of starch powder and gum powder is used as the vegetable binder powder, it can be used at the time of injection in the injection molding method or in the injection press molding method having the same injection step as the injection molding method.
- a molding material that can be suitably fluidized at the time of injection and can be filled into the mold without gaps can be obtained while suppressing the amount of mixed water as compared with a case where only starch powder is used as the vegetable binder powder. . Since the biodegradable fibrous molded article obtained by molding the molding material has a low water content, the drying time after demolding is short. Therefore, according to the method of the present invention, a biodegradable fibrous molded article can be mass-produced at low cost.
- the vegetable fibrous formed article produced by the method according to the present invention does not contain any synthetic resin, is biodegraded in a natural environment and is integrated with soil to become a soil component. It can also be treated as general waste under the container recycling method.
- the mixing ratio of the gum substance is 15% or less based on the total weight of the vegetable binder powder. If the mixing ratio of gum exceeds 15% by weight, the releasability at the time of demolding is reduced.
- 2 to 17 parts by weight of vegetable fiber powder and 1 part by weight of vegetable binder powder are mixed, and 3 to 9 parts by weight of the mixture and 1 part by weight of water are mixed.
- a method for producing a biodegradable fibrous molded article comprising forming a vegetable fibrous molding material and molding the vegetable fibrous molding material.
- the injection molding method is performed.
- a molding material that can be suitably fluidized and can be filled into a mold without gaps can be obtained at the time of injection in an injection or injection in an injection press molding method having an injection step similar to the injection molding method. Since the molding material has a low moisture content, the biodegradable fibrous molded article obtained by molding the molding material also has a low moisture content and a short drying time after demolding. Therefore, according to the method of the present invention, a biodegradable fibrous molded article can be mass-produced at low cost.
- a biodegradable fibrous molded article By molding the molding material, a biodegradable fibrous molded article can be mass-produced at low cost.
- the vegetable fibrous formed article produced by the method according to the present invention does not contain any synthetic resin, is biodegraded in a natural environment and is integrated with soil to become a soil component. It can also be treated as general waste under the container recycling method.
- the weight of the vegetable fibrous powder mixed with 1 part by weight of the vegetable binder powder is less than 2, the molded article will strongly adhere to the mold, making it difficult to remove the mold. If the weight part of the vegetable fiber powder mixed with 1 part by weight of the vegetable binder powder exceeds 7, the strength of the molded body is reduced. If the weight part of the mixture of the vegetable fibrous powder and the vegetable binder powder mixed with 1 part by weight of water is less than 3, the strength of the molded body is reduced, and there is a problem at the time of demolding. Possible If the weight part of the mixture of the vegetable fibrous powder and the vegetable binder powder mixed with 1 part by weight of ice exceeds 9, the fluidity of the molding material decreases and the It becomes difficult to fill without gaps.
- any non-toxic plant fiber material powder such as wood, grass, leaves, rice husk, rice bran, fruit peel, coffee bean extract residue, or a mixture thereof can be used. it can.
- non-toxic starch powder As the vegetable binder powder, non-toxic starch powder, gum powder, or a mixed powder thereof can be used.
- a coloring material or a fat-soluble component derived from a natural product may be added to a molding material obtained by mixing vegetable fiber powder, vegetable binder powder, and water.
- biodegradable fibrous molded article obtained by the method according to the present invention examples include packaging trays, tableware such as chopsticks and bowls, food material containers, lighting fixtures, decorations, rugs, toys, furniture furniture, footwear. , Ashtrays, flowerpots, stationery, sports equipment, automotive interior goods, building materials, etc.
- the plant binder powder is a starch powder. Since starch powder is available inexpensively and in large quantities, it is suitable for inexpensively mass-producing plant fiber molded products.
- starch powder any non-toxic starch powder such as wheat starch, potato starch, corn starch, hydroxy corn starch, high amylose starch, sago starch, tapio power starch or a mixture thereof can be used.
- the plant binder powder is a mixture of a starch powder and a gummy powder.
- the mixture can be used at the time of injection in an injection molding method or in an injection press molding method having an injection step similar to the injection molding method.
- a molding material that can be suitably fluidized and can be filled into a mold without gaps can be obtained while suppressing the amount of mixed water as compared with a case where only starch powder is used as the vegetable binder powder.
- Biodegradable fiber formed from the molding material Since the fiber compact has a low water content, the drying time after demolding is short. Therefore, according to the method of the present invention, a biodegradable fibrous molded article can be mass-produced at low cost.
- the mixing ratio of the gum substance is 15% or less based on the total weight of the vegetable binder powder. If the mixing ratio of gum exceeds 15% by weight, the releasability at the time of demolding is reduced.
- the gum is a water-soluble polysaccharide.
- Gum especially water-soluble gum, which is a water-soluble polysaccharide, promotes starch gelatinization, promotes fluidization of biodegradable fibrous molding materials, improves processability, and produces vegetable fiber powder. Strengthens the main structure of the molded article formed by
- the water-soluble polysaccharide is one or more selected from xanthan gum, tamarind gum, dielan gum, power ragginan, pullulan, guar gum, locustin gum, tara gum, pectin, alginic acid and agar. It is.
- Water-soluble polysaccharides such as xanthan gum, tamarind gum, dielan gum, power ragginan, pullulan, guar gum, locust bean gum, tara gum, pectin, alginic acid, and agar can be used. These may be used alone or in combination of one or more.
- the water-soluble polysaccharide is one or two selected from xanthan gum and tamarind gum.
- xanthan gum or tamarind gum or a mixture thereof as the water-soluble polysaccharide, it is possible to obtain a molding material having particularly excellent flowability at the time of injection and favorable release property at the time of demolding.
- the mixing ratio of tamarind gum be 70% or less based on the total weight of the water-soluble polysaccharide.
- the particle size of the vegetable fibrous powder is 60 to 200 mesh.
- the particle size of the vegetable fiber powder By setting the particle size of the vegetable fiber powder to 60 mesh or less, the explosion and explosion of the vegetable fiber at the time of opening the mold in the molding step can be prevented.
- vegetable fiber In order to grind to a particle size of less than 200 mesh, a large amount of equipment and labor are required, which hinders mass production of molded articles.
- the water content of the vegetable fiber powder is 4 to 20% by weight.
- the vegetable fiber powder having a particle size of 60 to 200 mesh can be efficiently classified from the vegetable fiber powder using the rising air flow and the cycle dust collector.
- Vegetable fibrous powders having a water content of 20% by weight or less are suitable for classification using an ascending air flow and a cycle dust collector.
- a large amount of equipment and labor are required, which hinders the mass production of compacts.
- a vegetable fibrous material having a water content of 40 to 50% by weight is washed and sterilized with steam at 150 to 180 ° C, dehydrated under pressure, dried by heating, An impulse load is applied to pulverize to form a vegetable fiber powder having a moisture content of 4 to 10% by weight. Then, the mixture is classified by mixing into a cyclone dust collector, and classified to obtain a vegetable fiber powder having a particle size of 60 to 200 mesh and a water content of 4 to 10% by weight.
- the vegetable fiber material is sterilized and the action of enzymes in the vegetable fiber material is stopped. Color is maintained. As a result, it is possible to manufacture a molded article that is hygienic and retains the natural color of the vegetable fibrous material.
- the moisture content of the naturally dried vegetable fiber material is 40 to 50% by weight. From the viewpoint of shortening the drying time and saving energy, it is desirable to heat and dry the vegetable fibrous material having a water content of 40 to 50% by weight after dehydrating under pressure. Direct pressurization and dehydration of a vegetable fibrous material with a water content of 40 to 50% by weight requires a great deal of energy and time, but it is washed and sterilized with steam to reduce the water content to 60 to 75.
- c moisture content is dried by heating 4 0 wt% or more of plant fibrous materials which can be dehydrated in a short time with less energy up to about 35 wt% moisture content
- Vegetable fibrous powder having a moisture content of 4 to 10% by weight obtained by pulverization is mixed in an ascending air stream and classified, and then guided to a cyclone dust collector for classification, and classified into two stages.
- a cyclone dust collector for classification, and classified into two stages.
- a vegetable fibrous material having a water content of 4 ° to 50% by weight is washed and sterilized with steam at 150 to 180 ° C, dehydrated under pressure, and subjected to impact load. Pulverized to form a vegetable fibrous powder having a water content of 10 to 20% by weight, and the vegetable fibrous powder is mixed with an ascending air stream and classified in an environment shielded from outside air. Then, the mixture is guided to a cycle dust collector and classified to obtain a vegetable fiber powder having a particle size of 60 to 200 mesh and a water content of 10 to 20% by weight.
- Vegetable fibrous powder having a water content of 10 to 20% by weight obtained by pulverization is mixed with an ascending air stream and classified, and then guided to a cyclone dust collector to be classified to perform two-stage classification.
- a cyclone dust collector to be classified to perform two-stage classification.
- Shields vegetable fiber powder with water content of 10 to 20% by weight from outside air By classifying in a disconnected environment, humidification of the plant fiber powder in the classification process can be prevented.
- a vegetable fibrous material having a water content of 40 to 50% by weight is subjected to an impulse load and pulverized to obtain a plant fiber material having a water content of 10 to 20% by weight.
- the plant fibrous powder is mixed in an ascending air stream and classified in an environment ⁇ , which is shielded from the outside air, and then classified by introducing it to a cyclone dust collector to obtain a water content of 10 to 20.
- a vegetable fiber powder having a particle size of 60 to 200 mesh by weight% is obtained.
- the naturally dried vegetable fiber material having a water content of 40 to 50% by weight is pulverized by applying an impact load to make the vegetable fiber material fine and heat is generated by the powder due to the impact load. It is possible to dehydrate to a water content of 10 to 20% by weight in a short time.
- Vegetable fibrous powder having a water content of 10 to 20% by weight obtained by pulverization is mixed with an ascending air stream and classified, and then guided to a cyclone dust collector to be classified to perform two-stage classification.
- a cyclone dust collector to be classified to perform two-stage classification.
- By classifying the plant fiber powder having a water content of 10 to 20% by weight in an environment shielded from the outside air, humidification of the plant fiber powder in the classification step can be prevented.
- the water content is between 40 and 50% by weight.
- / 0 vegetable fiber material is ground to obtain a vegetable fiber powder having a particle size of 60 to 200 mesh and a water content of 4 to 20% by weight.
- a vegetable fibrous material having a water content of 40 to 50% by weight is guided to a minute gap between the blade and the mesh in an air stream, and the mesh and the blade are relatively moved in parallel.
- the physical fibrous material is sheared and pressed into the small hole of the mesh to grind and shear at the edge of the mesh.
- the vegetable fibrous material is atomized in the air stream and generates heat and dries.
- the particle size is between 60 and 200 mesh
- a plant fiber powder having a ratio of 4 to 20% by weight is obtained.
- the vegetable fibrous molding material is molded at a temperature of 60 to 130 ° C.
- the starch will not be gelatinized and the fluidity of the vegetable fibrous molding material will decrease, causing insufficient filling.
- the plant fiber molding material may not be injected from the molding machine nozzle. If the temperature of the vegetable fibrous molding material exceeds 130 ° C, the amount of steam jetted from the molding machine nozzle will increase, and gas will accumulate at the end of the cavity, causing insufficient filling.
- the molding temperature is as low as 60 to 130 ° C, there is an advantage that the processing energy is small.
- the vegetable fibrous molding material is finally formed without preforming.
- the vegetable fibrous molding material according to the present invention has an appropriate viscosity and an appropriate fluidity, and is surely transported by the screw of the injection molding machine, so that the transportability by the screw is improved. There is no need for preforming such as granulation to enhance. Therefore, the vegetable fibrous molding material according to the present invention can be finally molded by an injection molding machine as powder.
- the biodegradable fiber according to the present invention is a mixture of vegetable fiber powder, vegetable binder powder which is a mixture of starch powder and gum powder, and water. A molding material is provided.
- a mixture of vegetable fiber powder, vegetable binder powder and water wherein the weight of the vegetable binder powder is 1/7 to 1 times the weight of the vegetable fiber powder. / 2, wherein the mixing amount of water is from 10 to 25% of the total weight of the mixture.
- the biodegradable fibrous molding material having the above composition has a low moisture content
- the biodegradable fibrous molded article formed from the molding material also has a low moisture content and a short drying time after demolding. Therefore, by using the molding material having the above composition, a biodegradable fibrous molded article can be mass-produced at low cost.
- Molding materials of the above composition can be used for injection molding or injection molding. It is suitable for injection press molding and the like having an injection step similar to the shape. It is also possible to use the biodegradable fibrous molding material having the above composition for extrusion molding, transfer molding, and heat and pressure molding.
- FIG. 1 is a process chart of a method for producing a biodegradable fibrous formed article according to an example of the present invention.
- FIG. 2 is a cross-sectional view of a hopper used in the method for producing a biodegradable fibrous formed body according to the example of the present invention.
- FIG. 3 is a cross-sectional view of a steam washer used in the method for producing a biodegradable fibrous formed article according to the embodiment of the present invention.
- (A) is a side sectional view
- (b) is a transverse sectional view.
- FIG. 4 is a cross-sectional view of a drawing machine used in the method for producing a biodegradable fibrous formed body according to the example of the present invention.
- FIG. 5 is a cross-sectional view of a dryer used in the method for producing a biodegradable fibrous molded article according to the example of the present invention.
- (A) is a side sectional view, and (b) is a transverse sectional view.
- FIG. 6 is a cross-sectional view of a pulverizer used in the method for producing a biodegradable fibrous formed body according to the example of the present invention.
- FIG. 7 is a configuration diagram of a classifier used in the method for producing a biodegradable fibrous formed body according to the example of the present invention.
- FIG. 8 is a perspective view of a modified example of the pulverizer used in the method for producing a biodegradable fibrous component according to the embodiment of the present invention.
- the hopper 1 includes a main body 11 and a shaft member 12 extending horizontally in the main body 11.
- a number of stirring arms 13 are attached to the shaft member 12.
- the member 12 is driven to rotate by a motor 14.
- the vegetable fibrous material loosened by the stirring arm 13 rotating with the rotation of the shaft member 12 falls from the hopper 1 and is conveyed to the steam washer 2 by a belt conveyor (not shown).
- the steam washer 2 has a cylindrical outer shell 21 extending horizontally.
- the cylindrical outer shell 21 has a lower portion 21a made of mesh. Opening doors 22 a and 22 b are provided at both ends of the cylindrical outer shell 21.
- a cylindrical inner shell 23 made of mesh is disposed inside the cylindrical outer shell 21.
- a spiral projection 23 a is attached to the inner surface of the cylindrical inner shell 23.
- a plurality of inner shell support rollers 124 are disposed between the cylindrical outer shell 21 and the cylindrical inner shell 23.
- a specific one of the plurality of shell supporting rollers 124 is a driving roller that is rotationally driven by a motor (not shown), and the other is a driven roller.
- the opening / closing door 22 a of the steam cleaning machine 2 opens, and the vegetable fiber material transported by the belt conveyor (not shown) is transported into the cylindrical inner shell 23.
- the opening / closing door 22 a closes, a specific drive port in the plurality of inner shell support rollers 24 rotates, and the cylindrical inner shell 23 rotates.
- the helical projections 23 rotate, and the vegetable fibrous material is conveyed toward the door 22b.
- Steam at 150 to 180 ° C is supplied to the cylindrical shell 21 through an opening formed in the vicinity of the opening / closing door 22 a of the cylindrical shell 21, and the cylindrical shell 2 It is discharged from the cylindrical outer shell 21 through an opening formed in the vicinity of the opening / closing door 2 2b of 1.
- the steam flows into the mesh inner cylindrical shell 23 to wash and sterilize the vegetable fiber material being transported, and to increase the water content of the vegetable fiber material to 60 to 75% by weight. Let it.
- the high temperature heating by the steam stops the action of the enzymes in the vegetable fiber material and maintains the natural color of the vegetable fiber material.
- the stones, sand, debris, and water dropped from the vegetable fiber material removed from the vegetable fiber material are mixed with the mesh of the cylindrical inner shell 23 and the mesh of the lower part 21 a of the cylindrical outer shell. It is discharged from the steam washer 2 through the.
- the door 2 2 b opens. At this time, the plant fibrous material washed and sterilized and humidified is discharged from the steam cleaning machine 2.
- the vegetable fiber material discharged from the steam washing machine 2 is conveyed to the drawing machine 3 by a belt conveyor (not shown).
- the squeezing machine 3 includes a hopper 31, an elbow 32 connected to a lower end of the hopper 31, and an upper roller 33 a arranged in contact with a discharge port of the elbow 32.
- Lower rollers 1 3 b are provided.
- the lower roller 33b is a driving roller that is driven to rotate by a motor (not shown), and the upper roller 33a is a driven roller.
- the upper roller 33a is driven up and down by a driving device (not shown).
- the vegetable fibrous material conveyed by a belt conveyor (not shown) is fed into the hopper 31 of the drawing machine 3.
- the vegetable fibrous material is drawn through the ERPO 32 between the high-speed rotating upper roller 33a and the lower roller 33b, and is dehydrated under pressure.
- the vegetable fiber material whose moisture content has been increased to 60 to 75% by weight is passed through a pair of rollers and dehydrated under pressure, so that the vegetable fiber material instantaneously has a moisture content of about 35% by weight. Dehydrated until.
- the dehydrated vegetable fiber material is discharged from the drawing machine 3.
- the plate-like vegetable fibrous material discharged from the drawing machine 3 is conveyed to the dryer 4 by a belt conveyor (not shown).
- the dryer 4 includes a cylindrical outer shell 41 extending horizontally. At both ends of the cylindrical outer shell 41, an inlet 41a and an outlet 41b are formed.
- a cylindrical mesh shell 42 made of mesh is arranged in a cylindrical outer shell 41. At both ends of the cylindrical inner shell 42, an inlet 42a and an outlet 42b are formed to face the inlet 41a and the outlet 41b of the cylindrical outer shell 41.
- a spiral projection 42c is attached to the inner surface of the cylindrical inner shell 42.
- a shaft member 43 to which a plurality of stirring arms are attached is provided in the cylindrical inner shell 42 so as to face the inlet 42 a. The shaft member 43 extends coaxially with the cylindrical inner shell 42.
- the shaft member 43 is fixed to the cylindrical inner shell 42 via a support member (not shown).
- a plurality of inner shell support rollers 44 are arranged between the cylindrical outer shell 41 and the cylindrical inner shell 42.
- a specific one of the plurality of shell support rollers 4 4 is a drive port driven by a motor (not shown). It is a driven roller.
- a plate-like vegetable fibrous material conveyed by a belt conveyor passes through the cylindrical outer shell inlet 41 a and the cylindrical inner shell inlet 42 a, and enters the cylindrical inner shell 42. It is carried in.
- a specific drive roller among the plurality of inner shell support rollers 44 rotates, and the cylindrical inner shell 42 rotates.
- the stirring arm attached to the shaft member 4 3 rotates, and the plate-like vegetable fibrous material is carried into the cylindrical inner shell 4 2. Is disentangled.
- the loosened vegetable fibrous material is conveyed toward the outlet 42b by the rotating spiral projection 42c.
- Air heated to 250 ° C is supplied to the cylindrical shell 41 through an opening formed in the vicinity of the inlet 41 a of the cylindrical shell 41, and is supplied to the cylindrical shell 41.
- the gas is exhausted at 150 ° C. through the opening formed in the vicinity of the outlet 41 b and discharged from the cylindrical outer shell 41.
- High-temperature air flows into the mesh inner shell 42, and the vegetable fiber material with a water content of about 35% by weight is dried by hot air in a short time to a water content of about 10% by weight. Is done.
- the vegetable fibrous material dried to a water content of about 10% by weight is discharged from the dryer 4 through an outlet 42b of the cylindrical inner shell and an outlet 41b of the cylindrical outer shell 41. You.
- the vegetable fibrous material discharged from the dryer 4 is transported to the crusher 6 by a transport pipe 5 disposed opposite the outlet 41 b of the cylindrical outer shell 41.
- the transfer pipe 5 includes a pipe main body 51, a spiral projection 52 formed on the inner surface of the pipe main body 51, and a driving device (not shown) that rotationally drives the pipe main body 51. It has.
- the pipe body 51 rotates and the spiral projection 52 rotates together with the pipe body 51, the vegetable fibrous material in the pipe body 51 is conveyed while being shielded from the outside air.
- the vegetable fiber material By shielding the vegetable fiber material from the outside air, it is possible to prevent a situation in which the vegetable fiber material dried to a water content of about 10% by weight is humidified during transportation.
- the powder frame machine 6 includes a case 61 having a hopper 61a, a crushing chamber 61b, and a powder discharge chamber 61c.
- Rotating plate 62 is accommodated in grinding chamber 61b Have been.
- a plurality of impact pins 63 are circumferentially attached to the outer edges of both surfaces of the rotating plate 62.
- the plurality of impact pins 64 are attached to the surrounding wall of the crushing chamber 61b so as to mesh with the plurality of impact pins 63.
- An annular mesh 65 is disposed radially outward of the rotating plate 62.
- the rotating plate is driven to rotate via a motor (not shown).
- the vegetable fibrous material transported by the transport pipe 5 is introduced into the hopper 61a, and is transported to the center of the crushing chamber 61b.
- the rotating plate 62 rotates, and the vegetable fiber material also receives the frictional force from the rotating plate 62 to rotate.
- the vegetable fiber material moves radially outward due to the centrifugal force accompanying the rotation.
- the vegetable fibrous material that has reached the outer edge of the rotating plate 62 receives an impact force from the impact pins 63 and 64 and is powder-framed to be a vegetable fibrous powder.
- impact force is applied to the vegetable fiber material, heat is generated.
- Vegetable fibrous powder having a large surface area (volume) is dehydrated in a short time to a moisture content of 4 to 10% by weight due to heat generated by impact.
- the vegetable fiber powder having a water content of 4 to 10% by weight passes through the annular mesh 65 and flows into the powder discharge chamber 61c.
- the vegetable fiber powder that has flowed into the powder discharge chamber 6 1 c is transported to the classifier 7 by the transport pipe 5.
- the classifier 7 includes a hopper 71.
- the upper end of the upright blower pipe 72 a extends through the inclined bottom wall of the hopper 71 into the hopper 71.
- a cyclone dust collector 73 is disposed adjacent to the hopper 71.
- a blower pipe 72 b extending from the top of the hopper 71 is connected tangentially to the upper part of the cycle dust collector 73.
- a blower pipe 72 c extending from the top of the cyclone dust collector 73 is connected to the filter 74.
- a blower pipe 72 d extending from the filter 74 is connected to the inlet of the centrifugal blower 75.
- a blower 72 e extending from the outlet of the centrifugal blower 75 is connected to the lower end of the blower pipe 72 a.
- a pipe 76a extending from a lower end of the hopper 71 is connected to a lower portion of the blower pipe 72a.
- a pipe 76b extending from the lower end of the cyclone dust collector 73 is in contact with the lower part of the blower pipe 72a.
- the air blown out of the centrifugal blower 75 is blown by the blower
- the air flows into the lower end of the blower pipe 72a through the eve 72e and rises up the blower pipe 72a to flow into the hopper 71.
- the air that has risen in the hopper 71 ⁇ flows tangentially from the top of the hopper 71 1 into the upper part of the cyclone dust collector 73 through the blowing pipe 72b.
- the air that has flowed into the cyclone dust collector 73 turns inside the cyclone dust collector 73 and then flows into the filter 74 from the top of the cyclone dust collector 73 through the blowing pipe 72 c.
- the air flowing into the filter 74 is returned to the centrifugal blower 75 through the blower pipe 72 d.
- the vegetable fibrous powder conveyed by the conveying pipe 5 is carried into the lower part of the blower pipe 72a, as indicated by a white arrow.
- the vegetable fiber powder is entrained by the ascending air flow flowing through the blower pipe 72 a and rises in the blower pipe 72 a and flows into the hopper 71.
- the buoyancy of the vegetable fiber powder received from the air flow decreases.
- Coarse particles in the vegetable fiber powder fall toward the lower end of the hopper 71, as indicated by the dashed-dotted arrow, and return to the lower part of the blower pipe 72a through the pipe 76a. .
- the fine particles in the vegetable fiber powder flow from the top of the hopper 71 through the blower pipe 72b into the cycle dust collector 73, as indicated by the white arrow.
- the fine particles in the vegetable fibrous powder flowing into the cyclone dust collector 73 rotate together with the air flow. Due to the centrifugal force generated by the swirling, medium-sized coarse particles in the vegetable fibrous powder collide with the side wall of the cyclone dust collector 73 and fall along the side wall as indicated by the dashed line arrow. The medium-sized coarse particles return from the lower end of the cyclone dust collector 73 to the lower part of the blower pipe 72a through the pipe 76b. The fine particles in the vegetable fiber powder flow into the filter 74 from the top of the cyclone dust collector 73 through the blower pipe 72 c as shown by the white arrow.
- the plant fiber powder is captured by the filter 74, and only the air is returned to the centrifugal blower 75 through the blower pipe 72d.
- the hopper 7 1 and the cyclone dust collector 7 3 classify the air into two stages, and the velocity of the rising air flow in the hopper 71, the rising distance to the top of the hopper 71, By setting the specifications and the like of the cyclone dust collector 73 to appropriate values, only the plant fiber powder having a particle size of 60 to 200 mesh is efficiently captured by the filter 74. By classifying the plant fiber powder having a water content of 4 to 10% by weight in an environment protected from the outside air, humidification of the plant fiber powder in the classification step is prevented.
- the plant fiber powder having a particle size of 60 to 200 mesh and a water content of 4 to 10% by weight captured by the filter-74 is conveyed to the mixer 8 by the conveying pipe 5.
- the water content is 4 to 10% by weight.
- Vegetable fiber powder, mixed powder of starch powder and gum powder, and water or vegetable fiber powder having a water content of 4 to 10% by weight 2 to 17 parts by weight and 1 part by weight of a vegetable binder powder are mixed, and 3 to 9 parts by weight of the mixture and 1 part by weight of water are mixed to obtain a vegetable fibrous molding material suitable for injection molding. Is formed.
- the above vegetable fibrous molding material has an appropriate viscosity and an appropriate fluidity, and is surely conveyed by the screw of the injection molding machine. Does not require preforming. Therefore, the vegetable fibrous molding material is conveyed by the conveying pipe 5 as it is as a powder, is injected into the injection molding machine 9, and is finally formed into a vegetable fibrous molded article by injection molding.
- the vegetable fibrous molding material is a wet powder and not a so-called fluid until immediately before being injected from the nozzle of the injection molding machine 9 into the mold. Filled without.
- the temperature of the vegetable fibrous molding material when it is injected from the nozzle of the injection molding machine 9 is controlled at 60 to 130 ° C, preferably 70 to 110 ° C. If the temperature of the vegetable fibrous molding material is lower than 60 ° C, the starch will not be gelatinized, and the fluidity of the vegetable fibrous molding material will decrease, causing insufficient filling. In the worst case, the fibrous molding material may not be injected from the nozzle of the injection molding machine 9. When the temperature of the vegetable fibrous molding material exceeds 130 ° C., the amount of steam jetted from the nozzle of the injection molding machine 9 increases, and gas accumulates at the end of the cavity, causing insufficient filling.
- the temperature range of the vegetable fibrous molding material is 70 to 110 ° C, a required amount of the vegetable fibrous molding material is reliably injected from the nozzle of the injection molding machine 9 and the end of the cavity. Gas does not accumulate in the Insufficient filling can be prevented.
- the processing energy is less than that of general plastic molding at a molding temperature of 200 to 250 ° C.
- the preforming costs such as the granulation costs required by the conventional plastic molding materials can be reduced. We can save.
- the vegetable fibrous material dehydrated by the squeezing machine 3 to a water content of about 35% by weight may be directly conveyed to the crusher 6 without passing through the dryer 4 and crushed and dried.
- a vegetable fiber powder having a water content of 10 to 20% by weight is obtained.
- the plant fiber material having a water content of 40 to 50% by weight in the hopper 1 is directly conveyed to the pulverizer 6 without passing through the steam dryer 2, the squeezer 3, and the dryer 4, and is pulverized and dried. You may let it dry. An unsterile vegetable fiber powder having a water content of 10 to 20% by weight is obtained. When molding a vegetable fibrous formed body that does not require sterilization, an unsterilized vegetable fiber powder having a water content of 10 to 20% by weight can be used.
- a particle size of 60 to 200 mesh is obtained from a plant fiber powder having a water content of 10 to 20% by weight. Can be efficiently classified.
- the water content of the vegetable fiber powder is 20% by weight.
- a plurality of crushers 6 ′ having an inlet opening 6 e ′ and an outlet opening 6 f ′ formed in the casing 6 d ′ are connected in series, and the first crusher 6 ′ is connected to the last crusher 6 ′.
- the size of the small-diameter hole of the mesh forming the cylindrical body 6c 'toward the pulverizer 6' may be sequentially reduced.
- the radial blade 6b' rotates, and a radially outward airflow is formed in the cylindrical body 6c '.
- the naturally dried vegetable fiber material having a water content of 40 to 50% by weight is introduced into the first-stage crusher 6 ′ through the inlet opening 6 e ′, it is entrained in the air stream, and the plant is planted.
- the porous fibrous material moves toward the tip of the radial blade 6, and is sheared by the blade formed at the tip of the radial blade 6 b ′, into the small-diameter hole of the mesh forming the cylindrical body 6 c ′. Pressed in, crushed and sheared.
- the crushed and sheared vegetable fibrous material is entrained by the airflow, flows out of the first-stage crusher 6 ′ through the outlet opening 6 f ′, and flows into the next-stage crusher 6 ′ .
- the vegetable fiber with a particle size of 60 to 200 mesh Quality powder can be obtained.
- the heat generated during grinding and shearing and exposure to the air stream reduces the moisture content of the vegetable fibrous powder to 4-20% by weight.
- crushers 6, 6 ' crushers having other structures may be used.
- the vegetable fibrous material dries due to the heat generated during milling.
- Example 1 Production of spherical molded body
- a vegetable fibrous powder having a grain size of 60 to 200 mesh and a water content of 8% by weight was prepared from thinned cedar wood.
- a homogeneous mixed powder of 8 parts by weight of this powder and 17 parts by weight of the plant binder powder was prepared, and uniformly mixed with 25 parts by weight of water, humidified, and molded with a mixer 8.
- Raw material was obtained. Is a vegetable binding agent powder, corn starch 9 7 wt 0/0, it was used xanthan gum 2% by weight and tamarind gum 1% by weight of the mixture.
- the raw material of the molding is put into the injection cylinder from the raw material hopper of the injection molding machine, the raw material of the molding is extruded into a mold according to a conventional method to produce a spherical molded body having a diameter of 50 mm and a weight of 72 g. did.
- the injection pressure at the time of molding was 103 MPa, the mold clamping force of the mold was 170 KN, and the demolding time was 75 seconds.
- vegetable fiber powder having a particle size of 60 to 200 mesh and a water content of 5% by weight was prepared from bamboo.
- a uniform mixed powder of 63 parts by weight of this powder and 20 parts by weight of the plant binder powder was prepared, and 17 parts by weight of water was uniformly added thereto, humidified, and formed by a mixer 8.
- a body material was obtained.
- the vegetable binder powder was used cornstarch 9 8 weight 0/0 Oyopi mixed compounds of xanthan gum 2 weight 0/0.
- the raw material for a molded product was put into an injection cylinder from a raw material hopper of an injection molding machine, the raw material for a molded product was extruded into a mold according to a conventional method to obtain a soup bowl weighing 65 g.
- the injection pressure during molding was 83 MPa, the mold clamp of the mold was 125 KN, and the demolding time was 45 seconds.
- a vegetable fibrous powder having a particle size of 60 to 200 mesh and a water content of 7% by weight was prepared from grass.
- a uniform mixed powder of 7 parts by weight of this powder and 14 parts by weight of the plant binder powder was prepared, and 13 parts by weight of water was uniformly added thereto, humidified, and formed by a mixer 8.
- a body material was obtained.
- a mixture of potato starch (98% by weight), xanthan gum (1% by weight) and tamarind gum (1% by weight) was used as the vegetable binder powder.
- the molded material After charging the above molded material from the material hopper of the injection molding machine into the injection cylinder, the molded material is extruded into a 5-piece star mold according to the usual method, and a star pendant weighing 12 g each is used. Got the top.
- the injection pressure during molding was 83 MPa, the mold was clamped to 950 KN, and the demolding time was 20 seconds.
- Example 4 Production of flower pots A mixture of cedar ogre flour and cypress planer waste with a moisture content of 40 to 50% by weight in the hopper 1 is fed to the crusher 6 without passing through the steam dryer 2, the squeezer 3, and the dryer 4. It was directly conveyed and pulverized and dried to prepare an unsterile vegetable fiber powder having a water content of 10 to 20% by weight. Using a classifier 7 having a hopper 71, a cyclone dust collector 73 and a filter 74, the vegetable fiber powder has a particle size of 60 to 200 mesh and a water content of 13 weight. % Of vegetable fibrous powder was prepared.
- a uniform mixed powder of 69 parts by weight of this powder and 11 parts by weight of vegetable binder powder was prepared, and 20 parts by weight of water was uniformly added to the powder to humidify the mixture.
- the raw material of the molded body is put into the injection cylinder from the raw material hopper of the injection molding machine, the raw material of the molded body is extruded into a mold according to a conventional method, and a flowerpot having a weight of 16 2 g (depth of 144 mm) is formed. , Diameter 127 mm).
- the injection pressure during molding was 160 MPa, the mold was clamped to 200 KN, and the demolding time was 90 seconds.
- a mixture of cedar ogre flour and cypress planer waste with a moisture content of 40 to 50% by weight in the hopper 1 is fed to the pulverizer 6 without passing through the steam dryer 2, the squeezer 3, and the dryer 4. It was directly conveyed and pulverized and dried to prepare an unsterilized vegetable fiber powder having a water content of 10 to 20% by weight.
- a classifier 7 having a hopper 71, a cyclone dust collector 73 and a filter 74, the vegetable fiber powder has a particle size of 60 to 200 mesh and a water content of 13
- a weight percent of vegetable fibrous powder was prepared.
- a homogeneous mixed powder of 65 parts by weight of this powder and 12 parts by weight of plant binder powder was prepared, and 23 parts by weight of water was uniformly added thereto, and the mixture was humidified. I got As the plant binder powder, only potato starch powder was used.
- the water content in the hopper 1 is 40 to 50 weight 0 /.
- a mixture of cedar oga flour and cypress planer waste is directly conveyed to a crusher 6 without passing through a steam dryer 2, a squeezer 3, and a dryer 4, and crushed and dried. 20 weight. /.
- Unsterilized vegetable fiber powder was prepared. Using a classifier 7 having a hopper 71, a cyclone dust collector 73, and a filter 74, the vegetable fiber powder has a particle size of 60 to 200 mesh and a water content of 8
- a weight percent of vegetable fibrous powder was prepared.
- a uniform mixed powder of 62 parts by weight of this powder and 15 parts by weight of the vegetable binder powder was prepared, and 23 parts by weight of water was uniformly added thereto and humidified. I got The vegetable binder powder, Tapio force starch 9 4 wt 0/0, xanthan gum 2% by weight and tamarins seed gum 4 wt. /. Was used.
- the method for producing a biodegradable fibrous molded article according to the present invention is suitable for producing a biodegradable fibrous molded article having a short decomposition time in soil, a small burden on the global environment, mass production and a low cost. It is suitable.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Processing Of Solid Wastes (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003572733A JP4208140B2 (ja) | 2002-03-05 | 2003-03-05 | 生分解性繊維質成形体の製造方法 |
US10/506,669 US20050158541A1 (en) | 2002-03-05 | 2003-03-05 | Process for producing biodegradable fiber molding |
EP03710239A EP1481778A4 (en) | 2002-03-05 | 2003-03-05 | METHOD FOR PRODUCING A BIODEGRADABLE FIBER FORM |
CA002482644A CA2482644A1 (en) | 2002-03-05 | 2003-03-05 | Process for producing biodegradable fiber molding |
AU2003221312A AU2003221312A1 (en) | 2002-03-05 | 2003-03-05 | Process for producing biodegradable fiber molding |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002058140A JP2005131790A (ja) | 2002-03-05 | 2002-03-05 | 生分解性繊維質成形体の製造方法 |
JP2002-58140 | 2002-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003074242A1 true WO2003074242A1 (fr) | 2003-09-12 |
Family
ID=27784684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002547 WO2003074242A1 (fr) | 2002-03-05 | 2003-03-05 | Procede de production d'objets moules en fibres biodegradables |
Country Status (7)
Country | Link |
---|---|
US (1) | US20050158541A1 (ja) |
EP (1) | EP1481778A4 (ja) |
JP (2) | JP2005131790A (ja) |
CN (1) | CN1652905A (ja) |
AU (1) | AU2003221312A1 (ja) |
CA (1) | CA2482644A1 (ja) |
WO (1) | WO2003074242A1 (ja) |
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WO2012078021A1 (en) * | 2010-12-09 | 2012-06-14 | Universiti Sains Malaysia | Biodegradable plastic based on fruit waste powder mixture |
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JP2013531112A (ja) * | 2010-07-02 | 2013-08-01 | ニャムティプ ポーヴァロドム、 | 成形体のための均質生分解性混合物を製造する方法 |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006087680A (ja) * | 2004-09-24 | 2006-04-06 | Koichi Kunii | 人形または置物の製作法 |
JP4611696B2 (ja) * | 2004-09-24 | 2011-01-12 | ▲高▼一 國井 | 人形または置物の製作法 |
JP2013531112A (ja) * | 2010-07-02 | 2013-08-01 | ニャムティプ ポーヴァロドム、 | 成形体のための均質生分解性混合物を製造する方法 |
WO2012078021A1 (en) * | 2010-12-09 | 2012-06-14 | Universiti Sains Malaysia | Biodegradable plastic based on fruit waste powder mixture |
CN102581916A (zh) * | 2012-02-17 | 2012-07-18 | 孔祥军 | 采用对人体健康有益的木材和矿物质制成的彩色高密度板 |
JP2020117681A (ja) * | 2019-01-24 | 2020-08-06 | 正雄 王 | 生分解性植物繊維原料粒の組成物、及びその製造方法 |
CN111560174A (zh) * | 2019-02-14 | 2020-08-21 | 王正雄 | 可生物分解的植物纤维原料粒的组成物及其制造方法 |
JP6750824B1 (ja) * | 2020-03-19 | 2020-09-02 | 正雄 王 | 生分解性植物繊維原料粒の組成物、及びその製造方法 |
WO2021187072A1 (ja) * | 2020-03-19 | 2021-09-23 | 正雄 王 | 生分解性植物繊維原料粒の組成物、及びその製造方法 |
JP2021147512A (ja) * | 2020-03-19 | 2021-09-27 | 正雄 王 | 生分解性植物繊維原料粒の組成物、及びその製造方法 |
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AU2003221312A1 (en) | 2003-09-16 |
EP1481778A1 (en) | 2004-12-01 |
JP2005131790A (ja) | 2005-05-26 |
EP1481778A4 (en) | 2005-05-11 |
JP4208140B2 (ja) | 2009-01-14 |
JPWO2003074242A1 (ja) | 2005-06-23 |
US20050158541A1 (en) | 2005-07-21 |
CN1652905A (zh) | 2005-08-10 |
CA2482644A1 (en) | 2003-09-12 |
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