JP2000343527A - Waste paper-wood composite powder and its manufacturing method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve drying efficiency of a composite plate by a method wherein a specific ratio of a thermoplastic resin molding material is mixed in a specific ratio of a woody waste paper crushed powder prepared by the method wherein the waste paper is crushed fibrously, wood powder is added, the product is dried to a specific water content by a shear heat generated by stirring impact force, and the mixture is granulated to a specific particle size by gelation kneading. SOLUTION: A dry air and a volatile gas such as water vapor or the like volatilized from a waste paper small piece are discharged from an exhaust gap pipe 95, and water content is lowered to <1.0 wt.%, preferably to <0.3 wt.% by drying. Thermoplastic resin molding material of 30-70 wt.%, preferably 40-60 wt.% is kneaded in 30-70 wt.% of the dried wood-waste paper crushed powder, preferably 40-60 wt.%, and gelation kneaded by rotation of stirring impact blades 85, 86, 87. The gelation kneaded material is cooled and granulated by a cooling granulater equipped with a cooling jacket to be adjusted to <=10 mm particle size to form waste paper-wood composite powder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic waste wood-based powder made mainly from a wood-based waste paper pulverized powder obtained by cracking and drying waste paper together with wood flour, and a method and an apparatus for producing the same.

[0002] Waste paper is paper such as newspapers, magazines, advertisements, flyers, catalogs, etc. once shipped and collected in the market.

[0003] Paper is obtained by dispersing pulp in water, rinsing and drying, and pulp generally breaks down wood into fine pieces.
It refers to wood pulp made into fibrous form, and also includes hemp pulp, linter pulp, straw pulp, and synthetic pulp. However, there is a limit to the use of forest resources, so the use of waste paper has recently increased to save resources and energy, and Japan's waste paper collection rate has exceeded 50%. Have been. The raw materials for Japanese paper and paperboard are roughly half of waste pulp and wood pulp.

[0004] Among the waste papers, newspaper waste, in particular, accounts for 9% of Japanese consumption.
The recovery rate exceeds 0%.

[0005]

2. Description of the Related Art Conventionally, recovered waste paper is pulped and produced into waste paper pulp, which is used as a raw material for paper and paperboard.

[0006] Waste paper pulp is generally inferior in strength, opacity, etc. due to cut fibers or chemically deteriorated fibers. However, since it is inexpensive, it is recycled from waste paper pulp to various types of paper and paperboard in general. That is, as paper, uncoated paper such as newsprint, printing paper and gravure paper, coated paper such as art paper and coated paper, packaging paper such as kraft paper and roll paper, and thin paper such as glassine paper and copy base paper Recycled into household thin paper and hybrid paper such as tissue paper and toilet paper, and the paperboard is recycled into corrugated paperboard, paperboard paperboard, building paper such as waterproof paper and gypsum board paper, and paper tube paper. .

As a waste paper pulp, there is a deinked DIP (De-Inked Pulp), which has a quality relatively close to that of virgin pulp and is used as a main raw material for newsprint and middle and lower grade printing paper. It is one. In the DIP process, selection and sorting of waste paper is performed, and the collected waste paper is unraveled into fibrous form by a mechanical force and chemicals with a pulper to remove foreign matters, and furthermore, a high-speed disintegrating machine for complete disintegration is used. As it is, it is pulped. Next, deinking treatment is performed with a flotator, and the deinked pulp is
After removal of fine foreign substances such as plastic sheets, hair, and book spine, they are dehydrated and sent to the bleaching process.

The above-mentioned pulper is a device for rotating the impeller at the bottom or side of the tank, stirring the raw material in the tank, disintegrating and dispersing the waste paper in water, and pulping.

Further, the above-mentioned floatator uses a deinking chemical such as caustic soda, an alkali chemical, and a detergent.
It is a device that swells the fiber, separates the ink particles from the pulp and makes it easier to float, and adsorbs the ink particles suspended and dispersed in the water together with the pulp to fine bubbles to separate them by floating and remove.

[0010] Conventional methods and apparatuses for recycling waste paper have the following problems.

(1) As the recovery rate of waste paper increases, the quality deteriorates due to the deterioration of the fibers used many times, and the quality deteriorates due to the contamination of the paper with foreign matter and defective ink removal. Is increasing. For this reason, there is a problem that it is difficult to recycle waste paper pulp into recycled paper.

(2) Of the waste paper, the covers of books and magazines, advertisements, flyers, catalogs and the like are printed in color, and the printed surface is often laminated with a resin film. Since these waste papers cannot be pulped, they must be removed.However, since it is difficult to automatically select and remove the resin film, the waste paper laminated with the resin film in advance can be manually removed from other waste paper. However, there is a problem that this sorting operation requires much time and effort.

(3) For the reason of the above item (2), there is a problem that waste paper laminated with a resin film cannot be reused as paper.

(4) When recycling waste paper from a non-laminated resin paper as waste paper pulp, a large amount of water is used in the production process as described above,
Because it uses chemicals, heat, and electricity, water pollution, air pollution,
Environmental preservation treatment such as odor is required, and equipment costs and environmental management costs are high. However, the production of waste paper pulp to recycle waste paper into paper and paperboard is an effective and effective use of resources in consideration of the relationship between the demand and supply of paper and paperboard, resource saving and energy saving. is there.

In view of the above-mentioned problems in recycling waste paper as waste pulp and reusing it as paper, and with the diversification of life in recent years, thermoplastic resin molding materials have become In consideration of the fact that it is used in various daily necessities, including automobiles and home appliances, and is discarded in large quantities, and in view of the social demands to recycle waste materials of these various thermoplastic synthetic resin products, The applicant of the present invention has conceived that, unlike the conventional recycling of waste paper, the waste paper is kneaded with a resin and reused as a resin molded product.

As an example, waste paper pulp is pulverized into chips, for example, as cellulosic crushed material, and the chips of the cellulosic crushed material are heated and kneaded together with a resin in a forming machine such as an extruder, and extruded with a screw into a forming die. To form a wood composite board.

The crushed cellulosic material obtained by pulverizing the waste paper pulp is charged into a molding machine together with a thermoplastic resin molding material.
When heated, a large amount of steam and volatile gas such as wood acid gas are generated from the crushed cellulosic material, which leads to oxidative corrosion of the wall inside the molding machine, wear of the molding die, and the surface of the molded product itself. It may cause roughness, bubbles, nests, and the like. Therefore, it is desirable to use a cellulosic crushed product having a water content as low as possible. However, in practice, before extrusion molding, the cellulosic crushed product is dried to a moisture content of 15 wt% or less by a drying facility described below, and is thoroughly dried. And the water content is within 3-5%.

Generally, drying equipment includes a smoke type, an electric type, a combustion gas type, a flue type, a steam type and the like according to a heat source and a heating method, and a natural circulation type and a forced circulation type according to a circulation method. Are further classified into an external ventilation type and an internal ventilation type.
There are various types of dryers for drying cellulosic crushed products crushed into small pieces, such as a rotary kiln type, a type in which the steam pipe itself rotates, a flash dryer, a jet dryer, and the like. As the number of air blowers increases, jet dryers that transfer small pieces while blowing hot air spirally along the circumference of a cylindrical furnace are most often used. The degree of drying of the small pieces is such that the surface layer has a water content of about 5 to 8 wt%, and the inner layer has a lower moisture content of about 3 wt%. In the drying equipment described above, the water content of the cellulosic crushed product cannot be reduced to 3 wt% or less at present.

The cellulose crushed material obtained by drying the crushed cellulose crushed paper pulp with the above-mentioned drying equipment can remove the water content of the cellulose crushed material to about 3 to 5% by weight. When the system-based crushed material is filled into a molding machine such as an extruder together with a thermoplastic resin molding material and heated, vaporized gas such as steam and wood acid gas is generated from the mixed cellulose-based crushed material. As described above, oxidation corrosion of the wall surface inside the molding machine, wear of the molding die, roughening of the surface of the molded product itself, generation of bubbles, nests, etc., and the occurrence of water content in the cellulosic crushed material before molding. It is an important problem to reduce the temperature as much as possible.

[0020]

DISCLOSURE OF THE INVENTION The present invention has been developed to solve the above-mentioned problems. In the process of crushing waste paper together with wood flour, the water content in the waste paper is substantially removed and the waste water is removed. Crushed, so that the thermoplastic resin molding material can constantly maintain the state of being fixed to the fibers of the wood-based waste paper crushed powder and the particles of the wood-based waste powder, thereby reducing the low water content of the wood-based waste paper crushed powder. An object of the present invention is to provide a wastepaper synthetic wood powder having a high utility value to be maintained, and a method and an apparatus for producing the wastepaper synthetic wood powder.

In order to achieve the above-mentioned object, in the waste paper woody synthetic powder of the present invention, the waste paper is crushed into a plurality of small pieces, preferably about 10 mm (diameter, one side or long diameter), and the small pieces of waste paper are subjected to impact grinding. A crushing force is applied to crush the fiber into a fibrous form, and wood powder, preferably about 100 mesh, is added to the crushed waste paper pieces, and a stirring impact force is applied thereto, based on the stirring impact force. A shear heat is generated, and the shear heat is used to dry the waste paper pieces and wood flour to a moisture content of 1.0 wt% or less, preferably 0.3 wt% or less. 30-70 wt%, preferably 40
30 to 70 wt% thermoplastic resin molding material to 60 wt%
%, Preferably 40 to 60% by weight, and the mixture is gelled and kneaded.
It is characterized by being cooled, pulverized and sized to a particle size of 10 mm or less.

The ranges of the amounts of the thermoplastic resin molding materials and the gelled wood waste paper pulverized powder are as follows.

When the thermoplastic resin molding material is PP, the wood waste paper crushed powder is 30 to 65% by weight, and the amount of PP is 70 to 35% by weight.
And preferably, the wood-waste paper pulverized powder is 45 to 55 wt%, P
The amount of P is 55 to 45 wt%, and when the thermoplastic resin molding material is ABS resin, the wood-based waste paper crushed powder is 30 to 55 wt%,
The amount of the ABS resin is 70 to 45 wt%, preferably 45 to 51 wt% of the wood waste paper crushed powder, and the amount of the ABS resin is 55 to 55 wt%.
49 wt%, and when the thermoplastic resin molding material is polystyrene, the wood waste paper crushed powder is 30 to 65 wt%, the amount of polystyrene is 70 to 35 wt%, preferably the wood waste paper crushed powder is 45 to 55 wt%, 55-45wt% polystyrene
When the thermoplastic resin molding material is PC, the wood waste paper crushed powder is 30 to 55 wt%, and the amount of PC is 70 to 45 wt%.
Preferably, the wood-waste paper pulverized powder is 45 to 51 wt%, P
The amount of C is 55-49 wt%, and
Particularly preferred is when the wt.% and PC are 53 wt.%.

When the thermoplastic resin molding material is PVC, the crushed wood waste paper powder is 30 to 56% by weight, and the amount of PVC is 70 to 4%.
4 wt%, preferably, the wood waste paper crushed powder is 40 to 55 wt%
%, The amount of PVC is 60 to 55% by weight, and when the thermoplastic resin molding material is nylon, the wood waste paper crushed powder is 30 to 55%.
wt%, the amount of nylon is 70-45 wt%, preferably
45-50% by weight of wood-waste paper crushed powder, 55% of nylon
~ 50 wt%.

When the thermoplastic resin molding material is PET, the wood waste paper crushed powder is 50 to 40% by weight, and the amount of PET is 30 to 10%.
wt%, PP is 10 to 50 wt%, preferably, wood waste paper crushed powder is 45 to 35 wt%, and the amount of PET is 25 to 1 wt%.
5 wt%, PP is 30 to 50 wt%.

Further, in the apparatus for producing waste paper woody synthetic powder of the present invention, the central part is communicated with a crushing means for crushing waste paper into a plurality of small pieces to form waste paper small pieces, and the feeding and feeding section 132 for the waste paper small pieces. On a fixed disk 131, fixed side crushing means in which each fixed pin 134 is sequentially implanted on a plurality of rotation trajectories, and on a movable disk 141 provided to be rotatable and opposed to the fixed disk 131. And each of the fixing pins 1
A movable side crusher in which each movable pin 144 is sequentially implanted on a plurality of rotation trajectories different from 34; and a takeout means to take out the crushed waste paper piece into a takeout port. Between each movable pin 144, a crushing means for crushing the waste paper pieces by an impact crushing force, and a plurality of agitating impact blades 85, 86, horizontally rotating in a closed container, that is, in a mixer 80. 87, a drying means in which an air supply pipe 96 for supplying dry air into the closed container and an exhaust pipe 95 for discharging both the dry air and vaporized gas such as water vapor volatilized from waste paper chips are connected. Water content within 1.0 wt%, preferably 0.3 wt%
% Thermoplastic resin molding material 30 to 70% by weight, preferably 40 to 60% by weight,
To 70% by weight, preferably 40 to 60% by weight, and mixing and gelling and kneading by rotating the stirring impeller, and a stirring impeller 104 inside the cooling and granulating the gelled kneading material. Cooling granulation means having a cooling water inlet and an outlet in the jacket 102; and granulating means for crushing the granulated waste paper woody synthetic powder to a particle size of 10 mm or less. I do.

In the method of the present invention for producing synthetic waste wood-based synthetic powder, a crushing step of crushing waste paper into a plurality of small pieces to form waste paper pieces, and adding wood powder to the waste paper pieces and applying a stirring impact force thereto And disintegrate it, and generate shear heat based on the stirring impact force. The shear heat reduces the water content of the waste paper chips and wood flour to within 1.0% by weight, preferably within 0.3% by weight. 30 to 70% by weight, preferably 40% by weight, of wood-waste paper crushed powder obtained by the crushing and drying process
30 to 70 wt% thermoplastic resin molding material to 60 wt%
%, Preferably 40 to 60 wt%, together with the stirring impact force to generate shear heat based on the stirring impact force, gelling and kneading by the shear heat, and then cooling and granulating. It is characterized by including at least a cooling / granulating step of forming waste wood-based synthetic powder and a step of pulverizing the granulated waste wood-based synthetic powder to form a waste paper-based synthetic powder having a particle size of 10 mm or less.

The waste paper is crushed into a plurality of small pieces to form waste paper pieces, and the above-mentioned waste paper pieces are subjected to an impact grinding force to be broken into fibers.

Into the mixer 80, the crushed waste paper pieces and wood flour of about 100 mesh are put. At this time, the waste paper chips and wood flour have a large water content, for example, a water content of 8
-10, average 6.1 wt%. Stirring impact wing 85,8
6, 87 and the scraper 84 rotate at high speed, and the waste paper chips and wood flour in the mixer 80 have a shear rate of 800 to 90.
It is broken by impact due to the shearing force of the stirring impellers 85, 86, 87 rotating at a high speed of 0 rpm. At this time, the stirring impeller and the waste paper and wood flour or waste paper and Friction heat due to friction between wood powders (in the present invention, these heats are collectively referred to as “shear heat”).
And the temperature inside the mixer 80 rises, and with this increase in temperature, a large amount of volatile gas such as water vapor and wood acid gas is volatilized from the waste paper chips and wood flour, and the waste paper chips and wood flour are discharged. And the moisture content of the wood flour is efficiently reduced and dried. Further, the waste paper chips and wood flour are more easily crushed as they are dried due to the shear heat, and the crushed waste paper chips and wood flour are further improved in drying efficiency. The wood flour is crushed and dried in a short period of time to form a crushed wood waste paper.

Further, when the dry air is supplied into the mixer 80 through the air supply pipe 96, the dry air contains the volatile gas and is discharged out of the mixer 80 through the exhaust pipe 95. It is possible to avoid the phenomenon that water vapor volatilized from waste paper chips and wood flour dew on the inner wall surface of the mixer 80 and water drops fall into the waste paper of the mixer 80.
The waste paper chips and wood flour inside are crushed and dried more efficiently.

The wood-waste paper pulverized powder thus obtained has a low water content of, for example, 0.3 wt%.

In the mixer 80, when the waste paper pieces that have only been crushed are dried, they become granular and easily absorb moisture, and it is effective to disintegrate the waste paper into cotton in the preceding process.

Into the above-mentioned mixer 80, the above-mentioned woody waste paper pulverized powder having a low water content and one or several kinds of thermoplastic resin molding materials are charged. Thermoplastic resin molding materials are stirring impact blades 85, 86,
87, it is kneaded with the above-mentioned wood waste paper pulverized powder, heated by the shear heat of the stirring impact blade and kneaded without agglomeration during mixing and dispersion to gel. At this time, the surroundings of each wood waste paper crushed powder, the outer periphery of the wood powder, and the entire circumference of the fibers of the waste paper small pieces containing the wood powder are covered with the thermoplastic resin molding material. The moisture in the powder is in a state of being confined by the thermoplastic resin molding material. In other words, each of the wood-waste paper crushed powders is protected by the thermoplastic resin molding material in a state of a low water content, and the low water content is maintained.

The above-mentioned waste paper chips are formed by mixing the wood powder with the waste paper chips and dispersing the wood powder in the waste paper chips, and dispersing the thermoplastic resin inside and outside the aggregate of the waste paper chips and the wood powder. In the above-mentioned mixing and kneading process, the possibility that the fibers of the waste paper chips are solidified in the thermoplastic resin without being dispersed as a lump of fibers alone is eliminated even in the mixing and kneading step, even if the mixture is fluidized and kneaded. can do.

Next, the kneaded material in the jacket is dried by cooling granulation means while being cooled to the solidification point of the thermoplastic resin molding material in the raw material, that is, near the melting point (melting point + 10 ° C.), and almost all is stirred by the stirring impeller. A granulated waste paper woody synthetic powder which is granulated and solidified into one containing a lump having a particle size of 30 mm or less and sometimes about 100 to 150 mm is obtained.

Further, the granulated waste wood-based synthetic powder is prepared by milling means comprising a crusher such as a cutter mill having an 8 mm screen, for example, rice grains having a particle diameter (short diameter) of 10 mm or less, preferably 3 to 5 mm. A large pellet of waste paper woody synthetic powder is obtained. As described above, the so-called thermoplastic resin molding material can be constantly maintained in a state of being fixed to the thermally and chemically stable low moisture content woody waste paper crushed powder so that the woody waste paper crushed powder can be constantly maintained. In order to maintain a low water content, and to constantly maintain a mixed and dispersed state of the wood-based waste paper crushed powder and one or several kinds of thermoplastic resin molding materials to provide good fluidity, the waste paper-based synthetic wood powder Is formed, and combined with the condensation and reduction by cooling, a waste wood-based synthetic powder is formed that does not rely on chemical reaction or adhesion.

Embodiments Embodiments of the present invention will be described with reference to the drawings.

Outline of Manufacturing Process of Waste Paper-Woody Synthetic Powder An outline of a manufacturing line of waste paper-woody synthetic powder of the present invention will be described with reference to FIGS. 1 (A) and 1 (B).

[Crushing of Waste Paper] The waste paper is cut into a strip having a width of about 5 mm by a cutting machine such as a slitter (not shown), and then is cut into a rectangular shape having a long side or a major axis of about 10 mm by a crushing means such as a cutter mill. Crush into small pieces.

[Disintegration of Waste Paper Pieces and Wood Flour (Production of Woody Waste Paper Disintegration Powder)] The small pieces of waste paper obtained in the preceding step are subjected to impact grinding force to be crushed into fibers.

[Drying of Waste Paper Pieces and Wood Flour (Production of Woody Waste Paper Disintegration Powder)] The broken pieces of waste paper and wood flour crushed in the previous step are put into a mixer 80 as a means for drying the waste paper pieces and wood flour. Drying is performed by the shearing force of the stirring impact blades 85, 86, and 87 to produce "woody waste paper crushed powder".

[Manufacture of Waste Paper Wood Synthetic Powder] (1) A thermoplastic resin molding material is charged in the same mixer 80 as a fluid mixing and kneading means, and the thermoplastic resin molding material and the “woody waste paper The "crushed powder" is gelled and kneaded to form a "kneaded material".

(2) If the kneaded material is discharged from the mixer 80 and there is a granulated waste paper synthetic wood powder formed into a lump of about 100 to 150 mm, a particle size of 30
Crush to about mm or less.

(3) The kneaded material which has been crushed is sucked by the blower 53 and fed to the cyclone 54.
Classify the dust and kneading material in the inside, send the dust to the dust collector,
The kneaded material is sent to a cooling mixer 100 provided below the cyclone 54.

(4) The kneading material is a cooling mixer 100
Inside, it is sufficiently cooled and granulated, and “granulated waste paper woody synthetic powder”
Is formed.

(5) The “granulated waste wood-based synthetic powder” is sized by a milling means of the cutter mill 120 to a rice grain size of about 3 to 5 mm to form “waste paper-based wood-based synthetic powder”.

[Storage of Waste Paper Wood Synthetic Powder] “Waste paper wood synthetic powder” is sucked by the blower 53 and sent to the cyclone 54, where the dust and the waste paper wood synthetic powder are classified in the cyclone 54, and the dust is collected by the dust collector. On the other hand, the waste synthetic wood powder is sent to a hopper dryer 55 provided below the cyclone 54, and is always kept dry by a heater in the hopper dryer 55.

[0048] The main manufacturing steps described above are used to break up waste paper.
A process for disintegrating and drying waste paper and wood flour in a mixer 80 which is a means for fluidly mixing and kneading waste paper or waste paper and wood flour and a thermoplastic resin; This is a gel kneading step, and further a step of sizing the granulated waste paper woody synthetic powder by a sizing means such as a cutter mill. Other steps can be added or omitted as necessary.

2. Details of Manufacturing Process of Waste Paper-Wood Synthetic Powder Hereinafter, embodiments of the above main manufacturing process and an apparatus used in each manufacturing process will be described with reference to the drawings.

[Disposal of Waste Paper] In this embodiment, the waste paper to be put into the mixer 80 is a newspaper, a magazine including a laminated paper, an advertisement, a flyer, a catalog, etc. once shipped and collected. The waste paper has a water content of 6.1.
wt% or more.

This waste paper is cut into a band of about 5 mm in width by a known cutting machine such as a slitter or the like as a raw material. Then, the band-shaped waste paper is put into a known crushing means, for example, a "cutter mill" shown below, and the long side or It is crushed into rectangular pieces such as rectangles or squares having a major axis of about 5 mm, or irregularly shaped pieces such as triangles, trapezoids, and rhombuses.

FIG. 4 shows a cutter mill 1 as an example of the crushing means.
20 is shown. Reference numeral 121 denotes a cutter mill body, which is a cylindrical casing having an upper surface opening, and the opening is covered with a lid 122 that can be opened and closed. The lid 122 has an input port 123 into which the crushed material is input into the cutter mill main body 121.

Further, a cutter support 124 is provided in the cutter mill main body 121, which is supported on the bottom surface of the cutter mill main body 121 and is rotated in a horizontal direction by rotation driving means (not shown). Three long rotating blades 125 are provided, and these three rotating blades 125 are disposed so as to form an equal angle of 120 degrees in the rotation direction of the cutter support 124, and the cutting edges of the three rotating blades 125 are the same. It is located on the rotation locus of. Furthermore, the three rotating blades 1
The second fixed blade 126 is fixed to the cutter mill main body 121 at a position substantially symmetrical to the rotation locus of the cutting edge of the rotary blade 125 with a slight gap from the rotation locus of the cutting edge of the 25 blades.
6, the cutter support 124 and the rotary blade 125 divide the inside of the cutter mill body 121 into two, and form a charging chamber 127 and a crushing chamber 128. The charging port 123 of the lid 122 is connected to the charging chamber 1.
27. The second fixed blade 126 and the rotary blade 12
The clearance with 5 cuts the crushed material to the desired size,
Or, in a broad sense, it can be adjusted freely so that it can be crushed. The clearance in this embodiment is 0.2 to 0.3 mm. The crushing chamber 128 is provided between the two fixed blades 126 and the rotary blade 1.
The screen is partitioned by a mesh screen 129 so as to surround the 25 rotation trajectories. The screen 129 is
In the present embodiment, the holes are formed of punching metal in which holes having a diameter of 8 mm are formed innumerably. At the lower end of the cutter mill body 121 of the crushing chamber 128, a discharge port 161 for discharging the small piece to be processed is provided.

In the cutter mill 120 described above, the lid 12
When the above-mentioned band-shaped waste paper having a width of 5 mm is inserted from the slot 123 and the cutter support 124 is rotated at 800 rpm by a rotation driving means (power 5.5 KW) (not shown), the waste paper is rotated by the rotary blade of the cutter support 124. Although the shape and the area between the fixed blade 125 and the fixed blade 126 are indeterminate via the screen 129, the long side or the long diameter is a rectangle such as a rectangle or a square having a size of about 5 × 5 mm or less, or a triangle, a trapezoid, a rhombus, or the like. It is crushed into irregular shaped pieces and discharged from the outlet 161. Incidentally, in the cutter mill of this embodiment, 30 kg of waste paper was processed in 2 minutes (300 kg / hour).

The cutter mill is not limited to the above. For example, like a hard crusher manufactured by Horai Co., Ltd., the rotary shaft of the rotary blade 125 is provided in the horizontal direction, and a screen 129 between the two fixed blades 126 is provided. There is also a cutter mill provided below.

The crushing means is not limited to the cutter mill described above. For example, various mono-cutters, shredders, crushers, etc., such as Gainax crusher manufactured by Horai Co., Ltd. or roll crusher manufactured by Nara Machinery Co., Ltd. "Crusher" can be used. `` Crusher '' is, for example, provided in parallel two axes rotating inward each other in a crusher body having an input port of the crushed object in the upper part, while providing a plurality of rotating blades at a predetermined interval on each axis, Provided to cut the object to be crushed into crushed pieces composed of appropriately large pieces by three claw blades which are meshed with each other on the outer periphery of each rotary blade of the shaft and project from the outer peripheral surface of each rotary blade so as to form an equal angle. Have been. The crushed material introduced from the upper inlet is drawn into the inside by the claw blades of the biaxial rotating blades rotating inward to each other, and continuously between the outer peripheral edges of the rotating blades rotating in a meshed state. While being slit by the acting shearing force, the material is crushed and cut by the compressing force acting at the time of retraction while forming a crushed piece. This crushed piece is
It is discharged from the discharge port 161 through a screen provided below the rotary blade of the shaft.

As described above, the size of the waste paper chips and wood flour in the mixer 80 is slightly reduced in drying efficiency when the length, width or diameter is larger than about 15 mm. It is preferably crushed into small pieces of preferably 8 mm or less, more preferably 5 mm or less.

In this embodiment, the water content of the waste paper fragments before the above-mentioned waste paper fragments and wood flour are put into the mixer 80 is 6.
Although it was 1 wt%, in the method of the present invention for disintegrating woody waste paper, there is no particular problem even when the water content of the waste paper fragments and wood flour is large, and the treatment is performed in proportion to the water content of the waste paper waste. It only takes time.

[Production Method of Waste Paper Wood Synthetic Powder] The production of the wood waste paper crushed powder and the waste paper wood synthetic powder of the present invention is carried out by the following means.

[Crushing Step] An impact grinding force is applied to the waste paper pieces formed as described above, and the waste paper pieces are crushed and loosened into fine fibers. In the case where such foreign matter is contained, this is a step of classifying and collecting as a flocculent paper fiber, and this step can be repeated an arbitrary number of times as necessary.

The crushing means used in this step is referred to as a "separator" for convenience in this embodiment.

In FIG. 6 and FIG.
In the center of the fixed disk 131, a supply inlet 132 for inputting each waste paper piece is communicated and opened, and a fixed end plate 133 is opposed to the fixed disk 131 with a processing space 155 therebetween. The outer peripheral edge of each of the plates 133 is fixed by the peripheral side plate 135. In the processing space 155, the movable disk 14 which is rotationally driven by a rotating horizontal shaft 142 is provided.
1, and the rotating horizontal shaft 142 is pivotally supported by bearings 143 and 143. The rotation horizontal shaft 142 is rotationally driven by a rotation driving means such as a motor.

On the fixed disk 131, a plurality of, in this embodiment, six concentric circles (relative to the movable disk 141) on the rotation trajectory a (FIG. 7), each fixed pin 13
4 sequentially in this embodiment, 16-24-32-36-42-40 pieces of fixing pins 134 are sequentially implanted from the center on the fixed disk 131 toward the outer peripheral edge on the concentric circle. On the other hand, on the movable disk 141, the movable pins 144, which are different from the fixed pins 134 and alternately enter on a plurality of rotation trajectories b in this embodiment, are moved from the center on the movable disk 141 to the concentric circles. 4-4-4-4-4-6 pieces are sequentially planted upward toward the outer peripheral edge, and separated or separated between the fixed and movable pins 134 and 144 by an impact grinding force. It is located so as to obtain the effect. Further, the peripheral side plate 1 is provided on the outer peripheral side of the movable disk 141.
35, a screen 151 having a predetermined mesh formed by punching pores having a desired diameter.
And a discharge port 152 is provided below the discharge space 156. In addition, as shown in FIG. 8, a blower 157 is connected to the discharge port 152 to the separator 130. In this embodiment, the screen 151 is a mesh having a diameter of 1 mm, but is usually 1.5 mm or less in diameter, preferably 0.8 mm in diameter.
It is a mesh of mm. The blower 157 is 37 horsepower, 5 kg / cm ² / pressure, 2 m ³ /
In the case of a small-sized machine, a material capable of sucking the paper layer formed into a fibrous form at 18.5 horsepower, 5 kg / cm ² / pressure, and 1-1.5 m ³ / min together with the air in the separator 130 is used. ing.

Further, the screen 15 of the processing space 155
An outlet 153 is formed at the lower part in FIG. 1 (FIG. 6). In addition,
As shown in FIG.
A blower 158 for sucking air from the inside may be communicated with the supply inlet 132 via the blower 158. As shown in FIGS. 6 and 8, the outlet 153 and the processing space 155 are connected to a communication pipe 235. Through the outlet 15
Compressed air from a compressed air supply source (not shown) circulating from the compressed air supply source 3 to the processing space 155 is connected to the communication pipe 235 via the pipe 236.
, And the crushed waste paper pieces discharged from the outlet 153 may be returned to the processing space 155 in the separator 130 again.

The rotating horizontal shaft 1 is driven by a rotating drive means such as a motor.
When the movable disc 141 is rotated to rotate each of the movable discs 141 to supply each waste paper piece to the supply slot 132, each waste paper piece is located at the center of the processing space 155, and each fixed and movable pin 13
4,144, the paper constituting the waste paper piece is broken by the impact grinding force. The paper is finely loosened by the impact grinding force to become a fibrous form, while foreign matter such as dust is
Due to the impact attrition force, the diameter is about 2-6
mm.

In this manner, the waste paper pieces are crushed and loosened into fibers, and foreign matter such as dust is crushed, and then the centrifugal force due to the rotation of the movable disk 141, suction by the blower 157 or via the pipe 236 is used. The airflow generated by the compressed air supplied into the processing space 155 gradually approaches the outer peripheral side of the separator 130 provided around the screen 151 in a state where the separated fibrous paper layer and foreign matter such as dust are mixed. I do. Thereafter, only the fibrous paper layer passes through the screen 151 having a diameter of about 1 mm and is discharged into the discharge space 156. Then, the fibrous paper layer is sucked to the outside through the discharge port 152 through the blower 157, and is collected. The paper fibers 84 are collected in a floc 250 and collected as flocculent paper fibers 84.

On the other hand, any foreign matter such as dust
51, and cannot remain inside the processing chamber.

When the collection of the paper fibers is completed, the outlet 153 and the processing space 155 are communicated with each other through a communication pipe 235 as necessary, and foreign matter such as dust remaining in the processing space is removed from the outlet 153 to the outside. Discharge to

As an example of a method for taking out the discharged foreign matter such as dust, as an example, the outlet 153 and the supply inlet 132
A pipe 236 from a compressed air supply source (not shown) is communicated with an outlet side of a communication pipe 235 that communicates the compressed air, and compressed air is discharged from the outlet 153 side to the supply inlet 132 side. A branch pipe 23 that branches the supply inlet side of the communication pipe 235 and communicates with the collection tank 240 for the foreign matter such as dust.
7 is provided at the branch point of the branch pipe 237, for example, a two-way solenoid valve 23 that can be switched at appropriate set intervals by a timer circuit, for example.
8, the downstream side of the communication pipe 235 is closed with an electromagnetic valve, and the branch pipe 237 side is opened, foreign matter such as dust left in the screen 151 is sucked, and the foreign matter such as dust is collected in the collection tank 240 through the branch pipe 237. It can also be recovered. Or,
A solenoid valve for opening and closing the branch pipe 237 and the communication pipe 235;
An electromagnetic valve for opening and closing the downstream side of the valve is provided, and these two electromagnetic valves are alternately opened and closed (FIG. 8).

In FIG. 6, the connection of the communication pipe 235 to the branch pipe 237 is performed on the upstream side of the communication pipe 235 and the outlet 1.
This is via a flange 154 provided on a pipe branching off the 53 side (to the rear in FIG. 6).

The paper fiber 84 thus collected is
In the next step, it is mixed with the wood flour and dried to form a crushed wood wastepaper powder, which is then mixed, flowed and kneaded with a thermoplastic resin to give a waste wood woody synthetic powder.

In FIG. 2, reference numeral 80 denotes a waste paper and wood flour drying means and a fluid mixing and kneading means which will be described later. In this embodiment, it is referred to as a "mixer" for convenience.

Reference numeral 81 denotes a mixer main body, which is a cylindrical casing having an upper surface opening and having a capacity of 300 liters. The opening is an input port 94 into which the crushed raw material waste paper pieces are fed into the mixer main body 81. The input port 94 is covered with an openable top cover 82. The upper lid 82 communicates with an air supply pipe 96 for supplying dry air.
1, an exhaust pipe 95 for discharging a large amount of vapor generated from waste paper chips and wood flour and volatile gas such as wood acid gas is communicated. Further, the outer peripheral surface near the bottom surface of the mixer body 81 is
A plurality of outlets 88 are provided, and a cover 89 for covering the outlets 88 is provided at the rod end of the cylinder 91.
The opening 88 can be freely opened and closed by the operation of.
A discharge duct 93 communicates with the discharge port 88.

Further, at the center of the bottom surface of the mixer main body 81, a shaft 83 which rotates at high speed by a rotary driving means of a motor (not shown) having a horsepower of 37 kW (DC) is supported upward in the mixer main body 81. The scraper 84 and the stirring impact blades 85, 86, 87 are arranged on the shaft 83 in order from the bottom to the top.
And tightened with a tightening nut 92 from the tip of the shaft 83. The shape of each of the stirring impact blades 85, 86, and 87 is not particularly limited, but in the present embodiment, the blades are two blades that are symmetric about the shaft 83. As shown in FIG. 2, when three pairs of stirring impellers are stacked, the blades are composed of a total of six blades.
The blades are equally angled (60
Degrees) and overlap with each other. In the case where a plurality of stirring impellers are provided, it is preferable that the stirring impellers intersect and overlap with each other at an angle equal to 360 degrees in terms of the total number of stirring impellers in terms of efficiently kneading the raw materials.

Further, the shape of the stirring impeller 87 located at the uppermost position is such that the tip of the two blades is bent so as to be higher than the portion to be attached to the shaft 83. It is located at a high position. Thereby, a shearing force by the stirring impeller 87 can be applied to the upper part of the waste paper chips and the wood flour charged into the mixer 80, and the waste paper chips and the wood flour are desirably crushed and dried in a desirable shape. is there.

The scraper 84 rotates by slightly sliding on the bottom surface of the mixer body 81 and rotates.
The raw material in 1 is stirred and circulated upward so as not to stay on the bottom surface, and furthermore, the processed raw material is scraped out so as not to remain on the bottom surface of the mixer body 81.

[Example of manufacturing process of wood-waste paper crushed powder] As described above, the crushing process crushed into small pieces having a size of about 5 mm in length and width, and used as the raw material The step of crushing and drying with a mixer 80 as a drying means will be described in detail below.

(1) By rotating the motor at a rotation speed of 900 rpm, the stirring impellers 85, 86, 87 and the scraper 84 are rotated at a high speed, the upper lid 82 of the mixer 80 is opened, and a large Crushed to about 5 x 5 mm and disintegrated into a flocculent form, 10 kg (25 wt%) of a waste paper waste of 6.1 wt% and a size of 10 kg.
10 kg of wood flour with about 0 mesh and moisture content of 8 wt%
(25 wt%) and TY-300 (white titanium oxide) 2
kg (10% by weight of waste paper and wood flour).

The thermoplastic resin is polypropylene 20 kg.
(50 wt%) In addition, 0.21 kg of the compatibilizer (0.5 wt% of the total amount excluding the compatibilizer) was simultaneously mixed.

The temperature in the mixer 80 at the time of feeding the waste paper pieces and wood flour was 89 ° C., and the load current of the motor was 155 A.

(2) The stirring impellers 85 and 8 are driven by a motor.
6, 87 and scraper 84 at 900 rpm
And rotate for 59 minutes and 18 seconds with waste paper chips and wood flour and TY-
300 (white titanium oxide).

The temperature in the mixer 80 was 225 ° C. 26 minutes and 22 seconds after the input of the waste paper chips and wood flour, and the load current of the motor was 61 A.

The rotational speed, that is, the shear speed of the stirring impeller is 9
Because it rotates at a high speed of 00 rpm, stirring impellers 85, 86,
87, the waste paper chips and wood flour in the mixer 80 are impact-ruptured by the shearing force and broken into powder, and the stirring impeller and the waste paper chips and wood flour or the waste paper chips and wood flour are mixed together. The amount of frictional heat, ie, the amount of heat generated by shearing, is increased, and the temperature inside the mixer 80 increases. As the temperature in the mixer 80 rises, the volatility of the volatile gas such as water vapor and wood acid gas in the waste paper chips and wood flour is increased, and the water content becomes 0.3 wt% and the powder or the flocculent aggregate of these powders is formed. Dried. That is, the waste paper fragments and wood flour crushed into small pieces are broken by the shearing force of the stirring impeller in the mixer 80, so that the drying efficiency is improved, and the waste paper pieces and wood flour are dried, so that they are further finely broken. There is a synergistic effect that the waste paper pieces and wood flour are crushed with the passage of time, and a large amount of waste paper chips and wood flour are dried in a short time to produce “woody waste paper crushed powder”.

Further, dry air is supplied into the mixer main body 81 via a supply pipe 96 from a dry air supply source comprising a compressor or a blower equipped with a dehumidifier (not shown) (pressure 0.5 kg / cm ² ). A large amount of vaporized gas such as water vapor and wood acid gas generated from waste paper chips and wood flour is contained in the dry air and discharged from the exhaust pipe 95, and is sucked into a dust collector by a blower (not shown). When the dry air is not supplied into the mixer in this manner, the water vapor in the mixer main body 81 is condensed on the inner wall surface of the mixer 80 such as the inner surface of the upper lid 82 and drops as water droplets, and falls on waste paper chips and wood flour below. Supplying and discharging the dried air to the mixer body 81 is important because waste paper pieces and wood flour in the body 81 cannot be efficiently dried.

As the water vapor evaporates from the waste paper chips and the wood flour, the waste paper chips and the wood flour become lighter, so that the load on the stirring impeller decreases. As described above, the load current of the motor at the start of operation is 155 A However, it changed to 61A 26 minutes and 22 seconds after the start of operation.

When the shearing speed of the stirring impeller is too high, the mixing effect is reduced because the waste paper chips and wood flour up due to the centrifugal force of the stirring impeller, and the mixing effect is lowered when the shearing speed is too low. The shear rate is preferably 800 to 500, because the amount of generation of shear heat due to the shearing force of the blades is small, so that drying time is required and drying efficiency is reduced.
900 rpm, more preferably 850-900 rpm.

Further, when additives such as calcium carbonate and titanium oxide are added to the waste paper chips and wood flour, the waste paper chips and wood flour become heavy, and the centrifugal force of the stirring impeller causes the waste paper chips and wood flour to rise. It is desirable to improve the drying efficiency because the amount is reduced, but it is possible to dry without adding additives such as calcium carbonate and titanium oxide, and it is not limited.

Further, in the present embodiment, the number of the stirring impellers is three in total, that is, three pairs of the stirring impellers 85, 86, and 87 as described above, and the total number is seven including the scraper 84. If the number is small, for example, if the total number of the pair of stirring impact blades 85 and scrapers 84 is three, the amount of heat generated by shearing due to the shearing force of the stirring impact blades decreases, and the paper pieces and wood flour do not dry efficiently. Preferably, the number of sheets including the scraper 84 is 5 or more, and more preferably the number of sheets including the scraper 84 is 7 or more.

The woody waste paper pulverized powder obtained as described above is
Most of the powder is crushed into a powder of about 0.1 mm.
It is rounded to a size of about 2 mm, has a water content of 0.4 wt%, is almost granular as a whole, has roundness, and has a relatively smooth and dense surface. In addition, the wood-waste paper crushed powder hardly causes agglomeration of each other, has good dispersibility in a solution or the like, and is suitable as a base material for supporting a pigment or the like.

[Production Example of Waste Wood-Based Synthetic Powder] Thereafter, one or several kinds of thermoplastic resin molding materials are put into a mixer 80, and the thermoplastic resin molding material and the wood-based waste paper pulverized powder are fluid-mixed and kneaded. The mixture is also gelled and kneaded by the mixer 80, which is a means, to form “synthetic waste wood-based flour”. This will be described in detail below.

(1) In the mixer main body 81, the wood waste paper crushed powder (water content: 0.4 wt%) of the above-described embodiment is formed.

Into this mixer body 81, 20 kg of PP pellets were charged as a thermoplastic resin molding material, and kneaded at a shearing speed of a stirring impeller of 900 rpm for 14 minutes and 10 seconds.

The temperature in the mixer main body 80 when the thermoplastic resin molding material was charged was 147 ° C.
The temperature after 0 seconds was 201 ° C. The melting point of PP is 180
２００200 ° C., and in this step, PP is not formed into a large lump due to the woody waste paper pulverized powder in the raw material, and is gelled in a clay state without agglomeration during mixing and dispersion. In this step, the above-mentioned clay-like gel is about 5 to 20 mm in diameter.
In the form of a "kneading material". In this kneaded material, each of the wood-based waste paper pulverized powder was formed such that the thermoplastic resin was attached to the entire surface of the wood-based waste paper pulverized powder alone, and the wood-based waste paper pulverized powder was confined by the thermoplastic resin molding material. As a result, each of the wood-waste paper pulverized particles has a form that maintains a stable low moisture content that is not affected by the external environment.

Incidentally, additives such as urea, calcium carbonate, titanium oxide and pigments can be introduced into the mixer 80.

The above-mentioned calcium carbonate provides good dimensional stability to waste paper-wood composite board extruded by an extruder or the like, and contributes to remarkably reduce expansion and shrinkage due to temperature change. It prevents deformation of the product and is itself inexpensive.

The titanium oxide has good fluidity and good dispersibility in a solution, and significantly reduces expansion and shrinkage due to temperature change with respect to a latex synthetic wood board extruded by an extruder or the like. It will contribute.

The urea is composed of ammonia, phenol, melamine and the like, and serves as a neutralizing agent for wood acid gas.

(2) The motor is operated at a low speed of 400 to 500 rpm, the cylinder 91 is operated, the lid 89 is retracted, and the discharge port 88 is opened. The gelled raw material in the mixer body 81 is discharged from the discharge port 88 through the discharge duct 93 to the next step. The temperature at the time of discharge was 203 ° C., and processing was performed for 14 minutes and 39 seconds from the introduction of the thermoplastic resin molding material to the discharge thereof.

When the motor is operated at a low speed to lower the temperature to about 10 ° C. higher than the melting point of the thermoplastic resin molding material in the raw material, the kneaded material in the mixer 80 is cooled, and has a diameter of about 25 mm or less. It is granulated into chunks and forms the same as the later-described granulated waste paper woody synthetic powder. However, in the present embodiment, the powder is formed into a powder having a constant particle size in a cooling granulation step described later.

(3) Cooling and Granulation In FIG. 3, reference numeral 100 denotes “cooling granulation means”, which is referred to as “cooling mixer” in this embodiment.

The kneaded material formed by the mixer 80 passes through the discharge duct 93 to the inlet 1 of the cooling mixer 100.
13 into the mixer body 101 having an inverted conical shape. An arm 103 which is supported at a substantially center in the upper wall of the mixer body 101 is connected to a motor 11 via a reduction gear 112.
1 rotates horizontally at a speed of 3 rpm. At the tip of the arm 103, a screw-type stirring impeller 104 is supported, and the rotation axis direction of the stirring impeller 104 is substantially parallel downward along the inner peripheral wall surface of the mixer body 101, near the lower end of the mixer body 101. Has been extended. The stirring impeller 104 is connected to a rotating shaft connected to the output shaft of the motor 105 via a rotation transmitting means such as a gear provided in the arm 103, and is driven to rotate at a speed of 90 rpm. The stirring impeller 104 rotates so as to draw a cone along the inner peripheral wall surface of the mixer body 101, and stirs the kneaded material in the arm 103.

Cooling water is constantly supplied from a water supply pipe 108 to a drain pipe 109 in a jacket 102 formed in the outer peripheral wall of the mixer body 101, and the kneaded material stirred by the stirring impeller 104 is cooled in the jacket 102. The inner peripheral wall surface of the mixer body 101 cooled by water is cooled to the vicinity of the melting point of the thermoplastic resin molding material to form "granulated waste wood-based synthetic powder" having a diameter of about 20 mm or less. The woody synthetic powder is discharged from the outlet 107 by opening the valve 106.

The melting point of PP is 180 to 200 ° C. In the present production example, the kneaded material gelled to 203 ° C. in the mixer 80 described above is introduced into the cooling mixer 100 for about 10 to 15 minutes, and It is cooled to 65 ° C., and is efficiently cooled and granulated by this cooling mixer. At this time, the temperature of the cooling water supplied from the water supply pipe 108 is 30 ° C.
The temperature of the cooling water discharged from the drain pipe 109 is 41
° C.

It is desirable that the kneading material is cooled to a temperature below the freezing point of the thermoplastic resin molding material, that is, the melting point. There is no need to actually cool the granulated waste paper synthetic wood powder to a temperature at which it can be discharged from the outlet 107, and if it is cooled to a temperature about 10 ° C. higher than the melting point of the thermoplastic resin molding material in the kneading material. good.

The cooling and granulating means is not limited to the above-mentioned apparatus such as the cooling mixer, but is provided with a stirring blade for stirring the kneaded material in the mixer body, and as described above on the outer peripheral wall surface of the mixer body. What is necessary is just to provide a jacket, and to cool the kneading material in the mixer body with cooling water flowing through the jacket.

The kneaded material formed in the mixer 80 can be cooled by performing only stirring using a general mixer not provided with the jacket 102, but it can be cooled efficiently. It is desirable to use a cooling mixer as in this embodiment.

(4) Sizing The granulated waste paper synthetic wood powder formed by the cooling granulation means is as follows:
Further, using a cutter mill similar to that shown in FIG. 4 described above, about 8 mm between the rotary blade 125 and the fixed blade 126 of the cutter support 124.
mm or less, preferably about 0.1 to 5 mm to form "synthetic waste wood-based flour", which passes through the mesh of the screen 129 of the sizing chamber 128 and has a grain size (minor diameter) of 3 to 5 mm. Is discharged from the discharge port 161. The screen 129 is made of a punching metal in which holes with a diameter of 8 mm are formed innumerably.

A known pulverizer can be used for this sizing.

In the above embodiment, PP (polypropylene) was mainly used as the thermoplastic resin molding material. However, the thermoplastic resin molded material recovered from various discarded resin molded products has been described. Use one of resins such as PVC, ABS resin, polystyrene, PET (polyester), PC (polycarbonate), nylon, etc., or a mixture of several kinds of these, in which a thermoplastic resin molding material is used as a thermoplastic resin molding material. be able to.

[0110] The thermoplastic resin molding material may be a recycled thermoplastic resin molding material obtained from a waste plastic film material such as an agricultural film waste material film, or a virgin thermoplastic resin. It is also possible to use the virgin thermoplastic resin and the recovered thermoplastic resin molding material, for example, 50% each.

Hereinafter, examples of the mixing ratio of the wood-based waste paper crushed powder and each thermoplastic resin molding material will be described.

[0112]

[Table 1]

The waste paper woody synthetic powder obtained by the present invention can be directly injected into a molding machine used in various molding methods such as injection molding, extrusion molding, compression molding, etc., to form a waste paper woody synthetic molded article. It can also be formed into pellets in the form of a resin material for molding or as a filler containing pigments and the like.

The following is an example of manufacturing a synthetic waste paper-woody synthetic product as a waste paper-woody synthetic board formed by extrusion using the waste paper-woody synthetic powder of the present invention.

FIGS. 5 (A) and 5 (B) show a production line for waste wood-based synthetic board. Reference numeral 61 denotes an agitator feeder, which is a tank for storing waste wood-based synthetic powder. Have been. A spiral screw is provided at a lower portion of the agitator feeder, and the screw feeds the waste synthetic wood powder in the agitator feeder 61 to the hopper 73 of the extruder 70 below. An extruder 70 and a motor 74 for rotatingly driving a screw 71 in the extruder 70
Is mounted on the upper surface of the base plate 77 which is rotatable in the horizontal direction, so that the extruder 70 can be rotated in the horizontal direction to easily attach and detach members such as the extrusion die 19 and the screen at the tip of the extruder 70. In addition, the extrusion die 19 can be mounted on the forming die 10. The waste paper synthetic wood powder is fed from the agitator feeder 61 to the hopper 73 of the extruder 70, heated and kneaded in the extruder 70, discharged from the extrusion die 19 to the forming die 10, and formed into a synthetic plate by the forming die 10. You. A braking force acting on the composite board in the direction opposite to the extrusion direction of the composite board is applied by the brake means 30 to form a waste paper-wood composite board. The brake means 30 is not always necessary and can be omitted to form a waste paper-wood composite board.

[0116]

Since the present invention is configured as described above, it has the following effects.

Same composition (except wood flour), same drying,
When a waste paper synthetic powder of a mixture of only waste paper and a thermoplastic resin material was produced in the fluid mixing and kneading step, the drying time was about half and the water content was about one-third as compared with the waste wood synthetic powder of the present invention. We could do the following:

In the drying step, the waste paper alone has a bulk specific gravity that is too large, and it takes a long time to obtain the same drying effect, and the wood flour has a reduced bulk specific gravity and an improved drying efficiency. Conceivable.

Further, a comparison of bending strength between wooden synthetic boards of the same dimensions by extrusion molding using the above-mentioned waste paper synthetic powder and waste paper synthetic wood powder under the same conditions, a result of 1.35 times was obtained.

It is considered that the fibers of the waste paper were reinforced by wood flour.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an apparatus for producing wood-based waste paper crushed powder and a production line for waste paper-based synthetic powder according to the present invention, wherein (A) is a plan view,
(B) is a front view.

FIG. 2 is an overall front view showing a cross section of a main part of a mixer (drying means and fluid mixing and kneading means) used in an embodiment of the present invention.

FIG. 3 is an overall front view showing a cross section of a main part of a cooling mixer (cooling and granulating means) used in an embodiment of the present invention.

FIG. 4 is an overall front view showing a cross section of a main part of a cutter mill (granulating means) used in an embodiment of the present invention.

FIGS. 5A and 5B show a production line of a waste paper-wood composite board of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a front view.

FIG. 6 is a partial longitudinal sectional view schematically showing a schematic configuration of a crushing apparatus used in the crushing step of the present invention.

FIG. 7 is a schematic front view for explaining a crushing operation in FIG.

FIG. 8 is a schematic diagram showing an example of use of a crusher used in the crushing step of the present invention.

[Explanation of symbols]

 41 Storage Tank 42 Motor 51 Crusher 52 Cyclone 53 Blower 54 Cyclone 55 Hopper Dryer 61 Agitator Feeder 70 Extruder 71 Screw 72 Gear Reducer 73 Hopper 74 Motor 75 Band Heater 76 Screen 77 Base Plate 79 Extruded Dough 80 Mixer (Drying Means and Fluid Mixing and kneading means) 81 Mixer main body 82 Upper lid 83 Shaft 84 Scraper 85, 86, 87 Stirring impact blade 88 Discharge port 89 Lid 91 Cylinder 92 Tightening nut 93 Discharge duct 94 Input port 95 Exhaust pipe 96 Air supply pipe 100 Cooling mixer (cooling mixer) 101 mixer body 102 jacket 103 arm 104 stirring impact blade 105 motor 106 valve 107 outlet 108 water supply pipe 109 drain pipe 111 motor 12 speed reducer 113 input port 114 frame 115 powder brake 116 gear 117 gear 118 cylinder 119 guide body 120 cutter mill (granulation means) 121 cutter mill main body 122 lid 123 input port 124 cutter support 125 rotating blade 126 fixed blade 127 input chamber 128 adjusting Granule chamber 129 Screen 130 Crusher (separator) 131 Fixed disk 132 Supply inlet 133 Fixed end plate 134 Fixed pin 135 Peripheral side plate 141 Movable disk 142 Rotating horizontal shaft 143 Bearing 144 Movable pin 151 Screen sieve screen (screen) 152 Discharge port 153 Outlet 154 Flange 155 Processing space 156 Discharge space 157 Blower 158 Blower 161 Discharge port 235 Communication pipe 236 Pipe 237 Branch pipe 238 Solenoid valve

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) // B29B 17/00 B09B 3/00 301Z C08L 101/00 ZAB F term (reference) 4D004 AA12 CA03 CA04 CA14 CA15 CA22 CA42 CA50 CB12 CB16 CB27 CC12 CC15 DA02 DA03 DA09 DA20 4F201 AA01 AC01 AD06 AR12 AR15 BA01 BA04 BC01 BC02 BC12 BC17 BC19 BC37 BK55 BL05 BL43 BM06 BM14 BN11 BN15 BN21 BN29 BN30 4F301 AA02 BE03 BE21 BE03 BE21 BE03 BE21 BB15 BE21 BB15 AA01W AH00X AH00Y BB12W BC03W BD04W BN15W CF06W CG00W CL00W FD090 GK00

Claims (3)

[Claims] Claims: 1. A waste paper piece obtained by crushing waste paper into a plurality of small pieces is subjected to an impact grinding force to be crushed into fibers, and wood powder is added to the crushed waste paper pieces. By adding a stirring impact force to generate shear heat based on the stirring impact force,
Due to this shearing heat, the water content of the waste paper chips and the wood flour is reduced to within 1.0 wt%, preferably within 0.3 wt%, and 30 to 70 wt%, preferably 40 to 6 wt%, of the wood waste paper pulverized powder.
30 to 70 wt%, preferably 40 to 60 wt% of thermoplastic resin molding material is mixed with 0 wt%, gelled and kneaded, cooled,
Waste paper synthetic wood powder characterized by being crushed and sized to a particle size of 10 mm or less. 2. A crushing step of crushing waste paper into a plurality of small pieces to form waste paper small pieces, and applying an impact grinding force to the waste paper small pieces to crush the waste paper into fibrous forms, Wood flour is added to the crushed waste paper chips, and a stirring impact force is applied thereto to generate shear heat based on the stirring impact force, and the shear heat generation causes the moisture content of the waste paper chips and wood powder to be generated. Crushed wood waste paper obtained by a crushing / drying step of drying crushed wood to within 1.0 wt%, preferably within 0.3 wt%.
30 to 70 wt%, preferably 40 to 60 wt%, of the thermoplastic resin molding material to 70 to 70 wt%, preferably 40 to 60 wt%
% Together with the above-mentioned stirring impact force to generate shear heat based on the stirring impact force, gelling and kneading by the shear heat generation, and then cooling and granulating to form granulated waste paper woody synthetic powder. A method for producing waste paper woody synthetic powder, which comprises at least a cooling / granulation step and a step of pulverizing the granulated waste paper woody synthetic powder to form a waste paper woody synthetic powder sized to a particle size of 10 mm or less. 3. A crushing means for crushing waste paper into a plurality of small pieces to form waste paper pieces, and a crushing means for crushing the waste paper pieces, wherein the crushing means comprises a plurality of fixed pins and movable pins. Between each other, each fixed pin is sequentially planted on a plurality of rotation trajectories on a fixed disk having a central portion communicating with a supply and input section of the waste paper piece, which crushes the waste paper piece by an impact grinding force. Fixed side crushing means provided on a movable disk provided rotatably opposite to the fixed disk, and each movable pin is sequentially implanted on a plurality of rotation trajectories different from the fixed pins. Side crushing means, and a take-out means for taking out the crushed waste paper pieces into a take-out port, a plurality of stirring impellers rotating in a horizontal direction in a closed container, and drying air in the closed container. Supply air supply pipe,
A drying means communicating with an exhaust pipe for discharging both of the dry air and vaporized gas such as water vapor volatilized from waste paper and wood flour; and a water content of 1.0 wt% or less by the drying means.
Pulverized wood waste paper powder 3 preferably dried to within 0.3% by weight
0 to 70% by weight, preferably 40 to 60% by weight, and 30 to 70% by weight, preferably 40 to 60% by weight of the thermoplastic resin molding material.
wt% together, and a fluid mixing and kneading means for gelling and kneading by rotation of the stirring impeller, and a cooling water inlet and an outlet in a jacket, and the gelled kneaded material is cooled and granulated, and granulated. An apparatus for producing waste paper woody synthetic powder, comprising: cooling granulation means for forming waste paper woody synthetic powder; and sizing means for crushing the granulated waste paper woody synthetic powder to reduce the particle size to 10 mm or less. .