JP2002187114A - Shell flower-containing waste paper board and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiberboard (shell flower-containing waste paper board) having a desired fundamental characteristics regarding a mechanical strength and the like and having a mothproofing function and a mildewproofing function with a high added value with waste paper as a main raw material and a method for manufacturing the same. SOLUTION: The method for manufacturing the shell flower-containing waste paper board comprises the steps of laying resin-impregnated sheets on both main surfaces of a composite layer-like molding obtained by arranging front layers each formed in a layer state by adding a binder to a shell flower fibrillated fiber obtained by fibrillating a stem of a shell flower, on both surfaces of a core layer molded in a layer state by adding an isocyanate adhesive to a waste paper fibrillated fiber, then simultaneously and integrally hot pressing the molding and the resin-impregnated sheets to mold the molding and the sheets in a board-like state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board made of waste paper as a main raw material and a method for producing the board. It relates to the manufacturing method.

[0002]

2. Description of the Related Art A factory,
A large amount of waste paper discharged from offices, households, etc.
In recent years, they have been reused for various purposes from the viewpoint of environmental protection and effective use of resources. As one of the recycling methods, there is known a method of manufacturing a fiber board (used paper board) for building materials from used paper.

[0003] In general, a fiberboard mainly made of used paper is formed by fibrillating and crushing used paper to remove foreign substances, then adding a binder thereto, heating and pressing to form a board. It is manufactured by doing.

However, in recent years, a fiberboard made of used paper as a main raw material has not only the desired properties such as strength and moisture resistance, but also has no adverse effect on the environment, What has added value, such as having safety, has come to be desired. However, the fact is that it is not always easy to manufacture a fiberboard having basic characteristics and further added value using waste paper as a main raw material.

The present invention has been made in view of the above-mentioned circumstances, and has desired characteristics with respect to mechanical strength, moisture resistance, etc., and has an insect-proofing function and a fungicide-proofing function, using waste paper as a main raw material. It is an object of the present invention to provide a high value-added fiber board (waste peach-containing waste paper board) and a method for producing the same.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention (Claim 1) is a moon peach-containing waste paper board mainly composed of waste paper and moon peach stem. In addition, a board raw material mainly composed of a mixture of waste paper defibrated fiber obtained by defibrating waste paper and moon peach defibrated fiber obtained by disassembling moon peach stems is formed into a board in the presence of a binder. It is characterized by.

The moon peach-containing waste paper board of the present invention is mainly composed of a mixture of waste paper defibrated fiber and moon peach defibrated fiber obtained by defibrating the stem of moon peach. Therefore, for example, when this moon peach-containing waste paper board is used as a building material or furniture, it is possible to prevent insects from being eaten or mold (mold) from growing, and to ensure sufficient durability. In addition to being possible, it is possible to keep the environment clean by keeping insects and molds away from the surroundings.

[0008] "Moon peach" is a plant belonging to the genus Zingiberaceae and the genus Ganoderma, distributed in the Ryukyu Islands and the like.
It is known that it has a medicinal effect such as an insect repellent function, a fungicide function, and a healthy stomach. In addition, the stem contains many fibers. Therefore, by mixing the peach defibrated fiber obtained by defibrating the peach stalk with the waste paper defibrated fiber, as described above, without impairing the properties such as mechanical strength and moisture resistance, A board that can be protected from being eaten or from growing mold, ensuring sufficient durability, and keeping the environment clean by keeping insects and mold away. Moon peach-containing waste paper board).

[0009] Further, the moon peach-containing waste paper board of claim 2 is:
It is characterized in that the moon peach defibrated fiber is blended in a ratio of 10 to 30% by weight on a dry basis.

[0010] The peach defibrated fiber is dried on a
By blending at a ratio of 30% by weight, a board having characteristics such as insect repellency and fungicide can be obtained without causing a significant increase in cost or impairing basic characteristics such as mechanical strength. Moon peach-containing waste paper board).

[0011] Further, the moon peach-containing waste paper board of claim 3 is:
An isocyanate-based adhesive is used as the binder, and a thermosetting resin impregnated in a sheet material on both the front and back surfaces, and a thermosetting resin surface layer formed by thermosetting integrally with the sheet material. Is provided.

[0012] An isocyanate-based adhesive is used as a binder to be added to a mixture of waste paper defibrated fibers and moon peach defibrated fibers constituting a board body (a portion other than the thermosetting resin surface layer). A thermosetting resin impregnated in a sheet-like material on both front and back sides of the body,
In the case of a structure in which a thermosetting resin surface layer that is heat-cured integrally with the sheet-like material is provided, a basic board having mechanical strength and the like is provided by a board body using an isocyanate-based adhesive as a binder. Water resistance, due to the thermosetting resin surface layer integrated with the sheet material
In addition to improving properties such as moisture resistance, it is possible to improve the releasability (peelability) of a hot pressing device (for example, a hot press device) from a hot plate in a board forming process. Moon defibrated fiber which constitutes the board body together with the fiber provides an insect repellent and fungicide function. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and It is possible to obtain a board (waste peach-containing waste paper board) capable of keeping the environment clean by keeping insects and molds away.

[0013] The method for producing a waste paper board containing moon peach according to the present invention (claim 4) is characterized in that a mixture of a waste paper defibrated fiber obtained by defibrating waste paper and a moon peach defibrated fiber obtained by disassembling a moon peach stem is used. A resin-impregnated sheet in which a sheet-like material is impregnated with a semi-cured thermosetting resin on both front and back main surfaces of a layered molded product obtained by adding an isocyanate-based adhesive to a board raw material as a main component and temporarily forming a layered product. After laying, the layered compact and the resin-impregnated sheet are simultaneously and integrally hot-pressed to form a board.

[0014] A resin-impregnated sheet is provided on both the front and back main surfaces of a layered molded product obtained by adding an isocyanate-based adhesive to a board raw material mainly composed of a mixture of used paper defibrated fibers and moon peach defibrated fibers. After laying, the layered molded article and the resin-impregnated sheet are simultaneously and integrally hot-pressed to form a board, so that even when an isocyanate-based adhesive is used as a binder, the hot-pressing apparatus ( In addition to being able to maintain good releasability (peelability) between a hot plate and a board of a hot press device), a sheet-like material integrally formed on both main surface sides of a formed board body The thermosetting resin surface layer integrated with the resin makes it possible to improve basic properties such as mechanical strength, and properties such as water resistance and moisture resistance. , It is possible to ensure the antifungal. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and It is possible to efficiently produce a board (waste peach-containing waste paper board) that can keep the environment clean by keeping insects and molds away.

Further, the moon peach-containing waste paper board of the present invention (claim 5) is a moon peach-containing waste paper board whose main components are waste paper and moon peach stalks. Core layer as a main component, and a surface layer mainly composed of a peach defibrated fiber obtained by defibrating a peach stalk disposed on both front and back sides of the core layer, a multi-layer structure in the presence of a binder Characterized by being integrally molded into a board shape having

In the present invention (claim 5), the waste paper board containing moon peach has a surface layer mainly composed of defibrated fiber on both front and back sides of a core layer mainly composed of recycled fiber of waste paper. As a result, the board surface is formed from a layer mainly composed of fibrillated defibrated fibers, making it possible to obtain a board with excellent insect repellent and antifungal functions (waste peach-containing paperboard). Become.

Further, the moon peach-containing waste paper board of claim 6 is:
The amount of moon peach defibrated fiber used for the surface layer,
It is characterized in that it is in the range of 10 to 30% by weight of the whole board on a dry basis.

By setting the amount of the fibrillated defibrated fiber used in the surface layer to be in the range of 10 to 30% by weight of the whole board on a dry basis, the cost may be significantly increased,
It is possible to obtain a board (monthly peach-containing waste paper board) having characteristics such as insect repellency and fungicide without impairing basic characteristics such as mechanical strength.

Further, the moon peach-containing waste paper board of claim 7 is:
An isocyanate-based adhesive is used as the binder, and a thermosetting resin impregnated in a sheet-like material on both front and back sides of a board body having a multilayer structure,
It is characterized in that a thermosetting resin surface layer thermoset integrally with the sheet material is provided.

An isocyanate-based adhesive is used as a binder to be added to the waste paper defibrated fiber and the moon peach defibrated fiber constituting the board body (the portion other than the thermosetting resin surface layer), and has a multi-layer structure. In the case of a structure in which a thermosetting resin surface layer in which a thermosetting resin impregnated in a sheet material is heat-cured integrally with the sheet material is provided on both front and back sides of the board body having Basic properties such as mechanical strength are secured by the board body using isocyanate-based adhesive, and properties such as water resistance and moisture resistance are secured by the thermosetting resin surface layer integrated with the sheet material. It is possible to improve the releasability (peelability) of the hot pressing device (for example, a hot press device) from the hot plate in the board forming step, The Getto fibrillation fibers constituting the board body with Kamikai繊 fiber, insect, antifungal function is provided. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and It is possible to obtain a board (waste peach-containing waste paper board) capable of keeping the environment clean by keeping insects and molds away.

Further, the method for producing a waste paper board containing moon peach according to the present invention (claim 8) is characterized in that a core mainly composed of waste paper defibrated fibers obtained by dry-fibrillating a raw material mainly containing waste paper into a fiber form. Addition of an isocyanate-based adhesive to the board raw material for the layer, and a core layer molded product that is temporarily molded into a layer. A composite layered body is formed by disposing an isocyanate-based adhesive to the board raw material and arranging a surface layered body which is temporarily formed into a layered form, and a sheet-shaped material is formed on both front and back main surfaces of the composite layered body. After laying a resin-impregnated sheet impregnated with a thermosetting resin in a semi-cured state, the composite layered body and the resin-impregnated sheet are simultaneously and integrally hot-pressed into a board shape. .

On both the front and back principal surfaces of the core layer molded article obtained by adding an isocyanate-based adhesive to the waste paper defibrated fiber and temporarily forming the layer, the isocyanate-based adhesive is added to the moon defibrated fiber to temporarily form a layer. Forming a composite layered molded article by disposing the molded surface layer molded article, and after laying a resin-impregnated sheet on both the front and back principal surfaces of the composite layered molded article, the composite layered molded article and the resin-impregnated sheet are simultaneously placed. In addition, by integrally hot-pressing and molding into a board, even when an isocyanate-based adhesive is used as a binder, the releasability between a hot plate of a hot-pressing device (for example, a hot press device) and the board. (Releasability) can be kept good, and the mechanical strength is obtained by the thermosetting resin surface layer integrated with the sheet material, which is integrally molded on both main surfaces of the molded board body. What And basic properties of water resistance, it is possible to improve the characteristics such as moisture resistance, by Getto fibrillation fibers further constituting the surface layer, it is possible to ensure insecticidal and antifungal. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and It is possible to efficiently produce a board (waste peach-containing waste paper board) that can keep the environment clean by keeping insects and molds away.

Further, the moon peach defibrated fiber used for the surface layer does not contain foreign matter such as a thermoplastic resin (for example, a vinyl chloride resin or a polyethylene resin) derived from waste paper, as in the case of used paper defibrated fiber. Prevents poor penetration of the thermosetting resin in the resin-impregnated sheet into the composite layered molded product and the occurrence of poor curing of the entire board, making it possible to efficiently manufacture waste paper boards with practicality. Become.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be shown and the features thereof will be described in more detail.

FIG. 1 is a flow sheet showing a method for manufacturing a waste paper board containing moon peach according to an embodiment of the present invention.

As shown in FIG. 1, the method for manufacturing a moonlight-containing waste paper board according to this embodiment includes, as a main step, a process for forming a core layer mainly composed of wastepaper-disintegrated fibers obtained by disintegrating wastepaper. A series of steps S1 and a series of steps S2 provided on both front and back sides of the core layer, for forming a surface layer mainly composed of peach defibrated fibers obtained by defibrating peach stems; And a step of forming a composite layered body by laminating the surface layers, laying a resin-impregnated sheet on the surface, hot-pressing and finishing the product.

A series of steps S1 for forming the core layer includes:
The main processes are a waste paper crushing process A1 for coarsely crushing waste paper raw material, a waste paper dry defibration process B1 for dry defibrating coarsely crushed waste paper raw material, and an isocyanate-based fiber as a binder for the dry defibrated waste paper defibrated fiber. A binder addition step C1 for adding and mixing an adhesive, and a core layer forming step D1 for forming a layered form by spreading waste paper defibrated fibers (core layer board material) to which an isocyanate-based adhesive has been added.
And

The used paper crushing step A1 is performed in newspapers, magazines,
This is a step of coarsely pulverizing waste paper raw materials such as corrugated cardboard into a shape that can be supplied to a dry defibrating machine. In addition, when coarsely-pulverized waste paper raw material is supplied, pulverization may not be necessary in some cases.

The waste paper dry defibration step B1 is a step of dry defibration of coarsely crushed waste paper raw material.
Waste paper raw material is sufficiently defibrated to form a fiber.

The binder addition step C1 is a step of adding and mixing an isocyanate-based adhesive as a binder to the dry defibrated used paper defibrated fiber. In addition,
Here, diphenylmethane diisocyanate is used as the isocyanate-based adhesive, and 8% by weight on a dry basis.
At a rate of

In the core layer forming step D1, the waste paper defibrated fiber (core layer board raw material) to which the isocyanate-based adhesive is added is formed into a layer (mat-like molded body) having a predetermined shape and thickness. This is the step of spreading (spreading).

A series of steps S for forming a surface layer
2 is a crushing process of moon peach stem A2 as a main process,
Moon peach dry defibration process B2 for dry defibration of coarsely crushed moon peach stalks, binder addition process C2 for adding and mixing isocyanate-based adhesive as a binder, and expanding the surface board material to which the binder is added And a surface layer forming step D2 for forming into a layered shape.

The peach stem crushing step A2 comprises:
This is a step of coarsely pulverizing until it can be supplied to a dry defibrating machine.

The moon peach dry defibration step B2 is a step of dry defibration of coarsely ground moon peach stalks.
The moon peach stalks are sufficiently disintegrated to form a fiber.

The binder addition step C2 is a step of adding and mixing an isocyanate-based adhesive as a binder to the dry defibrated moon peach defibrated fiber. In addition,
Here, diphenylmethane diisocyanate is used as the isocyanate-based adhesive, and 8% by weight on a dry basis.
At a rate of

In the surface layer forming step D2, the peach fiber defibrated fiber (raw material for the surface layer) to which the isocyanate-based adhesive is added is formed into a layer (mat-like molded body) having a predetermined shape and thickness. (Spread) process.

A series of steps S3 of laminating the core layer and the surface layer, further laying a resin-impregnated sheet, and hot-pressing and finishing the product are performed in the upper and lower sides (front and back) of the core layer board material (layer). A) a core layer / surface layer laminating step E of disposing (laminating) a board material for a surface layer on both sides to form a composite layered molded article having a three-layer structure composed of a core layer and a surface layer; Press-forming step F for pre-forming the resin, a resin-impregnated sheet laying step G for laying a resin-impregnated sheet on both upper and lower (front and back) sides of the pre-pressed composite layered molded article, and a resin-impregnated sheet is laid. A hot-pressing step (hot pressing step) H, in which the pressed composite layered molded article is hot-pressed with a hot plate under predetermined conditions to form a board, and the molded article (board) is cured. Curing and product finishing process to finish to board) It is equipped with a door.

The equipment for core layer forming and surface layer forming is usually integrated with equipment for laminating the formed core layer and surface layer on a forming conveyor used for forming a composite layered molded product. The forming of the core layer and the surface layer is integrally performed simultaneously with the step of laminating the lower surface layer → the core layer → the upper surface layer on the forming conveyor in this order. Therefore, the core layer forming step D1, the surface layer forming step D2, and the core layer / surface layer laminating step E can be understood as an integrated step.

In the core layer / surface layer laminating step E, the matte shape is formed on the front and back surfaces of the core layer board raw material (core layer) 2 formed in the mat shape in the core layer forming step D1 by the surface layer forming step D2. The formed layered board material (surface layer) 3 is laminated to form a composite layered body 4 having a three-layer structure (FIG. 2).
Is a step of forming

In this embodiment, the used amount of the moon peach defibrated fiber is set so that the content of the moon peach defibrated fiber in the moon peach containing waste paper board is 30% by weight on a dry basis. It was adjusted.

In this embodiment, as shown in FIG. 4, the thickness of the core layer 2 of the product of the moon-peach-containing waste paper board 1 is about 10 mm, and the surface layer 3 disposed on both the front and back sides of the core layer 2 is used. By laminating the surface board material layer (surface layer) 3 on both sides of the core layer board material layer (core layer) 2 so that the thickness of each is about 1 mm, the composite layered body 4
(FIG. 2) was formed.

In this embodiment, the thickness of the core layer 2 is about 10 mm, and the thickness of the surface layer 3 on both the front and back sides is about 1 mm in the product of the moonlight-containing waste paper board 1 (FIG. 4) as a product. Therefore, as shown in FIG. 2, the thickness of the core layer board raw material layer (temporary molded body) 2 before the preliminary pressing is about 200 mm, and the thickness of each surface layer board raw material layer (temporary molded body) 3 is about 20 mm. As described above, the board material for the core layer and the board material for the surface layer were laminated to form a composite layered molded body 4.

The pre-press step F is a step of pre-pressing the composite layered product 4.

In the resin impregnated sheet laying step G, as shown in FIG. 3, a thermosetting resin is added to the sheet material 5 on both upper and lower (front and back) sides of the composite layered molded article 4 prepressed in the prepress step F. In this step, a resin-impregnated sheet 7 impregnated with the resin sheet 6 is provided.

In this embodiment, a semi-cured phenolic resin (thermosetting resin) 6 as a thermosetting resin is used as a resin-impregnated sheet 7 on both sides of a sheet material 5 made of paper. A resin-impregnated sheet 7 having a thickness of 0.3 mm impregnated at a ratio of about 40% by weight was used.

Further, in the present invention, as the resin-impregnated sheet 7, a predetermined content (for example, 30%) of various thermosetting resins may be coated on both sides or one side of a sheet material (substrate) made of paper or cloth. To 70% by weight) can be used.

In laying the resin impregnated sheet 7 on both upper and lower (front and back) sides of the composite layered molded body 4, although not particularly shown, for example, the formed composite layered molded body is supported from the lower surface side. A tray plate is used as a support to be supplied to the hot-pressing step together with the composite layered molded body. After the hot-pressing step is completed, the hot-pressed molded body is delivered to a subsequent step. The impregnated sheet is placed, the composite layered molded article formed in the core layer / surface layer laminating step is placed on the resin impregnated sheet on the lower surface side, and the resin impregnated sheet on the upper surface side is further placed on the composite layered molded article. By laminating, a resin-impregnated sheet can be laid efficiently.

The hot pressing step (hot pressing step) H is performed by pressing the hot plate from both the front and back sides of the composite layered molded body 4 on which the resin-impregnated sheet 7 is laid, via a spacer having a predetermined thickness. This is a step of forming a board by hot pressing.

In this embodiment, (a) initial pressing pressure: 2.0 MPa (b) heating temperature: 180 ° C. (c) hot pressing time: 10 minutes (d) spacer thickness: 12 mm Was tightened.

As a result, as shown in FIG. 4, the core layer 2 mainly composed of waste paper defibrated fibers and containing an isocyanate-based adhesive at a ratio of about 8% by weight on a dry basis.
And a surface layer 3 containing, as a main component, a peach fiber defibrated fiber formed on both main surface sides of the core layer 2 and containing an isocyanate-based adhesive in a ratio of about 8% by weight on a dry basis. A moon-peach containing waste paper board 1 having a multi-layer structure including the sheet-shaped material 5 and the thermosetting resin surface layer 7a integrated therewith is formed.

The hot pressing step H can be performed in a single-stage system.
It is also possible to use a multi-stage system having a secondary hot press process such as a secondary hot press process or a continuous process. Also, using a high frequency heating hot press,
It is also possible to configure so as to perform the heat compression efficiently and in a short time.

In this hot pressing step H, the isocyanate-based adhesive for the core layer and in the surface layer is cured to exhibit a function as a binder (adhesive), and the phenol resin in the resin-impregnated sheet is cured. In addition to functioning as a binder (adhesive), the phenolic resin exhibits release properties (peelability) from the hot plate of the hot press device, preventing the molded board from adhering to the hot plate. Perform the function of

In the curing / product finishing step I, the board formed in the hot pressing step H is precut, cooled and cured, and then the cured molded body (board) is cut and trimmed to a predetermined size. This is a process to finish the final product (waste peach-containing waste paper board) with the following dimensions.

According to the method for manufacturing a used paper board of the above embodiment, the releasability (peelability) between the hot plate and the board of the hot press device is stably maintained for a long time, and a sufficiently stable operation is achieved. It can be performed continuously for a long time.

The moon peach-containing waste paper board manufactured as described above uses, as a main component of the surface layer, a moon peach defibrated fiber obtained by dry-fibrillating moon peach having an insect repellent and antifungal action. For example, when used for applications such as building materials and furniture,
Prevents the board from being eaten by insects or mold (mold) growing on the board, ensuring sufficient durability and keeping insects and mold away from the surroundings. In this way, the environment can be kept clean.

In order to confirm the insect repellent effect, a box made using the above-mentioned moon peach-containing waste paper board (Example) and a box made using a waste paper boat containing no moon peach (Comparative Example) were used for cockroach habitat. A test for measuring the number of cockroaches in the box was repeated many times (here, 100 times) by setting the environment in which the cockroaches were placed. As a result, the number of cockroaches in the box at the time of each observation was on average one or less in the case of the box of the example, whereas the number of cockroaches in the box of the comparative example was on average 45, and It was confirmed that a sufficient insect repellent effect was obtained in the box using the board.

The thickness, density, flexural strength, peel strength, water absorption, and water absorption thickness expansion coefficient of the moon peach-containing waste paper board manufactured as described above were measured. Table 1 shows the results. For comparison, a box (comparative example) made of a waste paper boat having a single-layer structure and almost the same thickness and density was prepared without using the moon peach, and was the same as the case of the moon peach-containing waste paper board of the above embodiment. , Thickness, density, bending strength, peel strength,
The water absorption rate and the water absorption thickness expansion rate were measured. Table 1 shows the results.

The measurement was performed according to JIS A5905, and the bending strength was span / 180 mm, bending speed / 10 mm.
/ Min. The water absorption rate and the water absorption thickness expansion rate are values measured after immersion at 20 ° C. for 24 hours at a depth of 2 cm from the water surface.

[0059]

[Table 1]

As shown in Table 1, in the case of the moon peach-containing waste paper board of the above-described embodiment, with respect to various properties such as thickness, density, bending strength, and peel strength, almost the same properties as the waste paper board of the comparative example were obtained. Was.

In the above-described embodiment, the core layer mainly composed of used paper defibrated fibers, the surface layer mainly composed of moon defibrated fibers disposed on both front and back sides of the core layer, and the outer layer The example described above is a moon-peach-containing waste paper board having a structure provided with a thermosetting resin surface layer in which a thermosetting resin impregnated in a sheet material is thermoset integrally with the sheet material, which is disposed in the sheet material. However, according to the present invention, it is also possible to obtain a moon-peach-containing waste paper board having a single-layer structure mainly composed of a mixture of waste-paper defibrated fiber and moon-peach defibrated fiber.

Such a single-layered structure of the waste paper containing moon peach can be formed, for example, by mixing a separately defibrated waste paper defibrated fiber and a moon peach defibrated fiber and adding a binder to the mixed fiber. Alternatively, it can be produced by mixing waste paper raw materials and moon peach stalks, defibrating them at the same time, adding a binder to the obtained mixed defibrated fibers, and molding. Further, a resin-impregnated sheet obtained by impregnating a sheet-like material with a thermosetting resin as in the above-described embodiment is disposed on both the front and back sides of the thus obtained moon peach-containing waste paper board, and then thermosetting. It is also possible to form a thermosetting resin surface layer by thermosetting the thermosetting resin integrally with the sheet material.

The single-layer moon-peach-containing waste paper board having a single-layer structure mainly composed of such a mixture of the old paper-sprayed fiber and the moon-peach fiber is also used in the above-described embodiment. It is possible to obtain substantially the same effect as in the case of.

The invention of the present application is not limited to the above embodiment in other respects. The present invention relates to the ratio of the binder to be added, the conditions of the hot pressing, the type of the thermosetting resin-impregnated sheet, and the like. It is possible to add various applications and modifications within the range of.

[0065]

As described above, the waste paper board containing moon peach of the present invention (Claim 1) is mainly composed of a mixture of waste paper defibrated fiber and moon peach defibrated fiber obtained by breaking the peach stem. And because the moon peach defibrated fiber acts as an insect repellent,
For example, when this moon peach-containing waste paper board is used as a building material or furniture, it can be prevented from being eaten by insects and mold (mold), so that sufficient durability can be ensured. At the same time, the environment can be kept clean by keeping insects and molds away from the surroundings.

Further, when the peach fiber defibrated fiber is blended at a ratio of 10 to 30% by weight on a dry basis as in the case of the peach-containing waste paper board of the second aspect, the cost is greatly increased. This makes it possible to obtain a board (monthly peach-containing waste paper board) having characteristics such as insect repellency and fungicide without losing basic characteristics such as mechanical strength.

Further, like the moon peach-containing waste paper board of claim 3, it is added to a mixture of the waste paper defibrated fiber and the moon peach defibrated fiber constituting the board body (the portion other than the thermosetting resin surface layer). An isocyanate-based adhesive is used as a binder, and a thermosetting resin obtained by impregnating a thermosetting resin impregnated in a sheet material on both front and back surfaces of a board body with the thermosetting resin integrally with the sheet material. In the case of a structure with a surface layer disposed, the board body uses an isocyanate-based adhesive as a binder to ensure basic properties such as mechanical strength and is integrated with the sheet-like material for thermosetting properties The resin surface layer improves the properties such as water resistance and moisture resistance, and also improves the releasability (peelability) of the hot pressing device (for example, hot press device) from the hot plate in the board forming process. It is possible to above, further by Getto fibrillation fibers constituting the board body with waste paper fibrillated fiber, insect, antifungal function is provided. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and This makes it possible to obtain a board (waste peach-containing waste paper board) that can keep the environment clean by preventing insects and molds from approaching.

The method for producing a waste paper board containing moon peach according to the present invention (claim 4) is characterized in that an isocyanate adhesive is added to a board raw material mainly composed of a mixture of waste paper defibrated fiber and moon peach defibrated fiber. After laying a resin-impregnated sheet on both the front and back main surfaces of the layered molded article that has been temporarily molded by adding, the layered molded article and the resin-impregnated sheet are simultaneously and integrally hot-pressed into a board shape. Therefore, even when an isocyanate-based adhesive is used as a binder, it is possible to maintain good releasability (peelability) between a hot plate and a board of a hot pressing device (for example, a hot press device). In addition, the thermosetting resin surface layer integrated with the sheet material integrally molded on both main surface sides of the molded board body provides basic properties such as mechanical strength, water resistance, moisture resistance Features such as It is possible to improve,
In addition, the defibrated fiber makes it possible to ensure insect repellency and mold resistance. Therefore, mechanical strength,
In addition to being excellent in water resistance, moisture resistance, etc., it is possible to prevent insects from eating and mold growing,
It is possible to efficiently manufacture a board (wool peach-containing waste paper board) having sufficient durability and capable of keeping the environment clean by preventing insects and molds from adhering to the surroundings.

The moon peach-containing waste paper board of the invention (claim 5) of the present invention has a surface layer mainly composed of peach fiber defibrated fibers on both front and back sides of a core layer mainly composed of waste paper defibrated fibers. Because it is installed, the board surface will be formed from a layer mainly composed of peach defibrated fibers, and it is possible to obtain a board (wool peach-containing waste paper board) that is excellent in insect repellent and antifungal functions. it can.

Further, as in the case of the moon peach-containing waste paper board of claim 6, when the amount of the moon peach defibrated fiber used in the surface layer is in the range of 10 to 30% by weight of the whole board on a dry basis, It is possible to obtain a board (monthly peach-containing waste paper board) having characteristics such as insect repellency and antifungal properties without causing a significant increase in cost or impairing basic characteristics such as mechanical strength. .

Further, as in the case of the moon peach-containing waste paper board of claim 7, the binder added to the waste paper defibrated fiber and the moon peach defibrated fiber constituting the board body (the portion other than the thermosetting resin surface layer). A thermosetting resin in which an isocyanate-based adhesive is used and a thermosetting resin impregnated in a sheet material is thermoset integrally with the sheet material on both front and back sides of the board body having a multilayer structure. In the case of a structure with a resin surface layer, a board body using an isocyanate-based adhesive as a binder ensures basic properties such as mechanical strength and is integrated with a sheet-like material for thermosetting. Water resistant,
In addition to improving properties such as moisture resistance, it is possible to improve the releasability (peelability) of a hot pressing device (for example, a hot press device) from a hot plate in a board forming process. Moon defibrated fiber which constitutes the board body together with the fiber provides an insect repellent and fungicide function. Therefore, while having excellent mechanical strength, water resistance, moisture resistance, etc., it is possible to prevent being eaten by insects and growing molds, and has sufficient durability, and This makes it possible to obtain a board (waste peach-containing waste paper board) that can keep the environment clean by preventing insects and molds from approaching.

Further, the method for producing a waste paper board containing moon peach according to the present invention (claim 8) is characterized in that both front and back principal surfaces of a core layer molded body obtained by adding an isocyanate-based adhesive to waste paper defibrated fibers and temporarily forming a layer. On the side, a composite layered product is formed by disposing a surface layered product which is preliminarily formed into a layer by adding an isocyanate-based adhesive to the peach fiber defibrated fiber, and the front and back main surfaces of the composite layered product are formed. After laying a resin impregnated sheet on
When the composite layered molded article and the resin-impregnated sheet are simultaneously and integrally hot-pressed to form a board, even when an isocyanate-based adhesive is used as a binder, a hot-pressing apparatus (for example, a hot press apparatus) ) And the board can be kept in good releasability (peelability) between the hot plate and the board, and integrated with the sheet-like material integrally formed on both main surfaces of the formed board body. The thermosetting resin surface layer makes it possible to improve basic properties such as mechanical strength, and properties such as water resistance and moisture resistance.
Furthermore, the peach fiber defibrated fiber constituting the surface layer can ensure insect repellency and fungicide resistance. Therefore,
It has excellent mechanical strength, water resistance, moisture resistance, etc., and can prevent insects from being eaten and moldy, has sufficient durability, and has insects around it. This makes it possible to efficiently manufacture a board (waste peach-containing waste paper board) that can keep the environment clean by keeping out mold and mold.

The peach fiber defibrated fiber used for the surface layer does not contain foreign matter such as a thermoplastic resin (for example, a vinyl chloride resin or a polyethylene resin) derived from waste paper like the waste paper defibrated fiber. It is possible to prevent poor penetration of the thermosetting resin in the resin-impregnated sheet into the composite layered molded article and occurrence of poor curing of the board as a whole, and to efficiently manufacture a wastepaper board having practicality.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing a method for manufacturing a waste paper board containing moon peach according to an embodiment of the present invention.

FIG. 2 is a view showing a composite layered molded article formed in one step of a method for producing a moonlight-containing waste paper board according to an embodiment of the present invention.

FIG. 3 is a view showing a state in which a resin-impregnated sheet is laid on both upper and lower (front and back) sides of a composite layered molded body in one step of the method for producing a moonlight-containing waste paper board according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view of a used paper board manufactured by the method for manufacturing a used paper board containing moon peach according to the embodiment of the present invention.

[Explanation of symbols]

1 January peach-containing waste paper board (product) 2 Core layer 3 Surface layer 4 Composite layered product 5 Sheet material 6 Thermosetting resin 7 Resin impregnated sheet 7a Thermosetting resin surface layer A1 Waste paper grinding process B1 Waste paper dry defibration process C1 B1 Additive process D1 Core layer forming process A2 Peach crushing process of moon peach B2 Moon peach dry defibration process C2 Binder adding process D2 Surface forming process E Core layer / surface layer laminating process F Pre-pressing process G Resin impregnated sheet laying process H Heat Pressing process (Hot pressing process) I Curing and product finishing process S1 A series of processes for forming a core layer S2 A series of processes for forming a surface layer S3 A series of processes for forming and finishing products

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B32B 21/08 B32B 21/08 (72) Inventor Satoru Teruna 324, Miyahira, Haebaru-cho, Shimajiri-gun, Okinawa 6F, 6F Term (Reference) 2B260 AA01 BA04 BA07 BA19 CB01 CB04 DA04 DA05 DA17 EA05 EB02 EB06 EB13 EB19 EB21 EB42 4F100 AH03G AJ02A AJ02B AJ02C AK01D AK01E AK51G AP03 AP03A AS00A AS10BA01BA10 BA01 BA01 BA10 BA01 BA10 BA01 BA01 EJ172 EJ422 EJ82D EJ82E EJ822 GB07 JB07 JB13D JB13E JC00 JD04 JK01 JL14 JL16 JL16A YY00A YY00B YY00C

Claims (8)

[Claims] Claims: 1. A waste paper board containing waste paper and a moon peach stem mainly composed of waste paper and moon peach stalk, comprising: a waste paper defibrated fiber obtained by defibrating waste paper; A moon peach-containing waste paper board, wherein a board raw material containing a mixture as a main component is formed into a board in the presence of a binder. 2. The defibrated fiber of the moon peach is 1% on a dry basis.
2. The moon peach-containing waste paper board according to claim 1, which is blended at a ratio of 0 to 30% by weight. 3. A thermosetting resin wherein an isocyanate-based adhesive is used as the binder, and a thermosetting resin impregnated in a sheet material is thermoset integrally with the sheet material on both front and back sides. 3. The used garment-containing paperboard according to claim 1, wherein a curable resin surface layer is provided. 4. An isocyanate-based adhesive is added to a board material mainly composed of a mixture of used paper defibrated fiber obtained by defibrating used paper and peach defibrated fiber obtained by defibrating a peach stalk. After laying a resin-impregnated sheet obtained by impregnating a semi-cured thermosetting resin into a sheet-like material on both the front and back main surfaces of the molded layered body, the layered body and the resin-impregnated sheet are simultaneously and integrally formed. A method for producing a waste paper board containing moon peach, which is hot pressed to form a board. 5. A paper board containing moon peach mainly containing waste paper and moon peach stalks, wherein a core layer mainly composed of waste paper defibrated fibers obtained by defibrating waste paper, and both front and back sides of the core layer Characterized in that the surface layer mainly composed of peach defibrated fibers obtained by defibrating the peach stalks arranged in the form is integrally formed into a board having a multilayer structure in the presence of a binder. Suzuki peach containing waste paper board. 6. The amount of the peach fiber defibrated fiber used in the surface layer is 10 to 30% by weight of the whole board on a dry basis.
The moon peach-containing waste paper board according to claim 5, wherein 7. A thermosetting resin impregnated in a sheet material on both front and back sides of a board body having a multilayer structure, wherein an isocyanate adhesive is used as the binder. 7. A peach-containing waste paper board according to claim 5, further comprising a thermosetting resin surface layer which is thermoset integrally with the pulp. 8. An isocyanate-based adhesive is preliminarily formed into a layer by adding a isocyanate-based adhesive to a core layer board material mainly comprising waste paper defibrated fibers obtained by dry-fibrillating a raw material mainly comprising waste paper. Surface layer molding, in which isocyanate-based adhesive is added to the surface layer board material mainly composed of moon peach defibrated fibers obtained by dissolving moon peach stalks on both front and back main surfaces of the core layer molded body, and the layer is provisionally formed into a layer. A composite layered molded article was formed by disposing the body, and a resin-impregnated sheet in which a sheet-shaped material was impregnated with a thermosetting resin in a semi-cured state was laid on both front and back main surfaces of the composite layered molded article. A method for producing a moon-peach containing waste paper board, wherein the composite layered molded article and the resin-impregnated sheet are simultaneously and integrally hot-pressed to form a board.