JP2684598B2 - Manufacturing method of laminated material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 2 × 4 construction method for veneer and control panels, a prefabricated method, and a method for producing a laminated material used as a base material for RC house roofs.

[0002]

2. Description of the Related Art For a roof of a building, a color colonial roof that is lighter than a heavy Japanese tile roof has come to be preferred because of its earthquake-resistant structure, and this tendency tends to be seen worldwide. The laminated material used as a base material for a colonial roof is usually made of a lauan laminated material composed of a lauan control panel. The Lauan laminated material 10 is composed of five layers of veneers 11 to 15 (FIG. 5), and the veneers 11 to 15 are thin rectangular plates processed using the Lauan material as a raw material. Adhesives 17a, 17b, 18 are provided on both front and back surfaces of the single plates 12, 14, respectively.
After applying a and 18b, the laminated materials 10 are laminated on each other so that the fiber directions of the single plates 11 to 15 intersect each other.
Is formed.

The laminated material 10 is manufactured, for example, through a manufacturing process as schematically shown in FIG. First, the raw material lauan material 1 is cut out, and after the lauan material 1 is fixed to the main shaft of the veneer lace machine 20, the main shaft is rotated to cut the blade 20a.
Is automatically advanced to scrape a lauan thin skin of a predetermined thickness along the annual ring of lauan wood 1. Next, this lauan thin skin is carried to the veneer clipper 22, the blade 22a is lowered, and each is cut into a predetermined rectangular dimension to produce the veneers 11 to 15.
Then, the veneers 11 to 15 are dipped in a storage tank 25 containing insect repellent 24 having a medicinal effect on flatworm, etc. to perform insect repellent treatment. Then, the single plates 11 to 15 are respectively inserted between the upper and lower double rollers 26a and 26b provided in the roller dryer 26, and hot air is blown from the nozzles 26c and 26d to dry them. After passing through these steps, an adhesive 27 such as a phenolic resin is applied to the front and back surfaces of the two single plates 12 and 14 using a spray gun 28. Next, the veneer 11 coated with the adhesive 27 is laminated with the veneer 11 and the back side of the veneer 12 with the veneer 13 so that the fiber directions intersect each other. Similarly, the single plate 13 is laminated on the front surface of the single plate 14 coated with the adhesive 27, and the single plate 15 is laminated on the rear surface of the single plate 14 so that the fiber directions intersect each other. Thus, the five-layer laminated material 10 in which the five single plates 11 to 15 are stacked is formed.

After that, the laminated material 10 is transferred and set to the hot press machine 30, the movable platen 30a is lowered, and the laminated material 10 is heated at a temperature of 110 to 140 ° C. and a load of 8 to 10 kg / c.
Compress under m ² . Then, the laminated material 10 is cut into a predetermined size by the circular saw 32a of the double sizer 32. Further, the drums 35a and 35b, which are provided on the drum sander 35 and around which the abrasive cloth paper is wound, are rocked and rotated to polish the surface of the laminated material 10. Through such a series of steps, the Lauan laminated material 10 having a predetermined thickness and having a surface finish was obtained.

[0005]

However, the conventional lauan laminated material 10 has the following problems. First, it was difficult to secure raw materials, and it was becoming a problem from the viewpoint of the destruction of the global environment (first problem). Raw material 1
Therefore, it can be collected only in specific areas such as Borneo, Malaysia, Philippines. Although the Lauan material 1 can be recycled, it takes 20 to 50 years to use it as a material for the laminated material 10. At present, the supply of Lauan wood 1 is too thin to meet the demand. On the other hand, it has been pointed out that the cutting of Lauan wood 1 to date has changed the global environmental balance. Recently, softwood and the like have been used for the material of the laminated material 10 due to the above reasons. However, as a softwood, there is a concern that it takes a long time to grow a large tree and causes a problem similar to that of a lauan wood. There is. Further, the Lauan laminated material 10 has a defect that it is weak against moisture (second problem). When used as a base for roofs, etc., it was immediately damaged by rain leaks. Even so, Lauan wood has many capillaries, which has caused holes in a dozen years.

Furthermore, the production of the lauan laminated material 10 has been troublesome (third problem). It was difficult to rotate the lauan material 1 with the veneer lace machine 20 and scrape the lauan thin skin (about 2 mm) along the annual ring of the lauan material 1 with the blade 20a. It is necessary to scrape off with a lauan skin because if the thickness is 2 mm or more, it may crack. And, veneer 11 obtained from Lauan thin skin
15, the thickness of the laminated material 10 is a standard value (about 12 m
In order to achieve m), it was difficult to stack five layers and to bond them to each other. In addition, there were many waste materials in the production of Lauan material 1 (fourth problem). The yield of the portion used for the veneers 11 to 15 of the lauan material 1 is 40 to 60.
It remained at about%.

The present invention solves the above problems,
It is intended to provide a method for producing a laminated material which is easy to secure raw materials, is environmentally friendly, is resistant to moisture and has sufficient strength, and has high utilization rate of raw materials and easy to process.

[0008]

Means for Solving the Problems The gist of the first invention is to cut a bamboo having a predetermined thickness in the fiber direction by a cutting means, and then press the curved bamboo by a first compression means to form a crack. It is spread while being formed, and the front and back surfaces of the expanded bamboo material are flatly cut by a cutting means, and then oil is removed and treated with insect repellent and dried by a drying means, and then the bamboo material is parallelized. To form a base material, a first coating material, and a second coating material, each of which is fixed at both ends thereof, and then the front surface and the back surface of the base material, or the first coating material and the second coating material. An adhesive is applied to either the front surface or the back surface, and then the first coating material and the second coating material are superposed on the sandwich structure so that the substrate is in the center and intersects with the fiber direction of the substrate. , Crimped by the second compression means That in the production method of the laminate. Here, the "fiber direction" is a vertical cutting direction in which bamboo can be easily split.
"After removing oil, performing insect repellent treatment, and drying by a drying means, a plurality of the bamboo materials are arranged in parallel and the two ends thereof are fixed to form a base material, a first coating material, and a second coating material." When the order of each processing step relating to oil removal, insect repellent treatment, drying operation, base material having a plurality of bamboo materials arranged in parallel and fixed at both ends thereof, a first coating material, and a second coating material is changed. In addition, it also includes the case of processing a plurality of times.

[0009]

According to the method for producing a laminated material according to the present invention, bamboo is used as a main constituent element of the laminated material. However, since the growth of bamboo is fast (about 3 years) and the regeneration is vigorous, it is environmentally friendly. There is no adverse effect. Further, since bamboo has a property of being resistant to moisture, it has sufficient durability even when used as a base material for a roof. Moreover, when a hollow pipe-shaped bamboo is split in the lengthwise direction and the curved bamboo is pressed and spread to form a flat surface, the base material, the first coating material, Since it is possible to form a plate-shaped body having a size as large as the second coating material, the productivity is excellent. In particular, if half-split bamboo is opened and formed into a flat shape, the area can be greatly increased, which saves labor and is more effective. Furthermore, when a laminated material with a sandwich structure is made with the crack side derived from the inner peripheral surface side of the bamboo facing the base material surface side, the adhesive adheres sufficiently to the cracks, which effectively acts on the integration of the laminated material. . In addition, the laminated material of the present invention has a three-layer structure, which is different from the conventional five-layer structure of the Lauan material, so that the manufacturing method is simplified. It has the advantage that the thickness of bamboo can be used as it is and that it can fully demonstrate its mechanical strength with its three-layer structure. Bamboo is generally considered to be very difficult to process. Since ancient times,
Only split bamboo or shaving method is used. In the laminated material and the method for manufacturing the same of the present invention, when bamboo is opened and used, a plate-shaped body occupying a large area can be easily made, and the cracks formed when opening can promote a further adhesive bonding action. Pay attention.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.
1 to 3 show one embodiment of a method for manufacturing a laminated material according to the present invention, FIG. 1 is a partially enlarged perspective view of the laminated material of the present invention, and FIG. 2 is a schematic manufacturing process for producing the laminated material of FIG. FIGS. 3A and 3B are partially enlarged perspective views of a bamboo material obtained by pressing half-split bamboo with the first compression means.

(1) Structure of Laminated Material The laminated material 100 is a thin plate-shaped first covering material 101 serving as a surface material.
And a thin plate-shaped second covering material 102 serving as a backing material, the thin plate-shaped base material 1 in which adhesives 105a and 105b are applied on the upper and lower surfaces.
With 03 sandwiched between them, they are joined and integrated in a sandwich structure (FIG. 1). Laminated material 100 is 910 mm x 1820 mm according to the standard product of commercial Lauan laminated product.
1 and is a perspective view of the partially cut product.

The first coating material 101 and the second coating material 102 are
Both are thin plate-like bodies having thicknesses t ₁ and t ₃ of about 2.5 mm,
It is formed by arranging a number of strip-shaped bamboo members 31b, which are spread apart from the half-divided bamboo 31a and are flattened by a cutting process, in parallel (FIGS. 1 and 2). The base material 103 is also a thin plate. The base material 103 is a strip-shaped bamboo material 31b in which a half-divided bamboo 31a is spread and formed flat by cutting.
The portions formed by arranging in parallel are the same as the first covering material 101 and the second covering material 102, but the thickness t ₂ thereof is about 5 mm . It was, first coating material 101,
The materials of the second coating material 102 and the base material 103 as thin plates are the same (that is, the thickness is about 5 mm), and after these three sheets are bonded together, the first coating material 101 and the second coating material 102
With respect to the above, since the front surface and the back surface thereof were shaved to finish to 2.5 mm, it is only different from the thickness of the base material 103.

Regarding the first covering material 101 and the second covering material 102, the half-divided bamboo 31a is expanded and becomes the bamboo material 31b, but a crack formed on the inner peripheral side of the half-divided bamboo 31a and having many cracks V formed therein. All sides are directed to the surface of the base material 103. With such a configuration, when the base material 103 is sandwiched and joined to the sandwich structure, the adhesive material 105a,
By incorporating a large amount of 105b, the first coating material 101, the second coating material 102, and the base material 103 are strongly integrated. Of course, the crack V is less likely to appear on the front and back surfaces of the laminated material 100, and a beautiful design surface is completed. Here, the half-divided bamboo is pushed out to form the bamboo material 31b, but it is of course possible to crimp a curved bamboo obtained by dividing a bamboo having a predetermined thickness in the fiber direction into three or more pieces to form a bamboo material. However, as the number of splits increases, the width of the strip-shaped bamboo material 31b becomes smaller. Therefore, since the number of bamboo materials forming the first covering material 101 and the like increases and it takes time and effort to manufacture, it is more preferable to use the bamboo material 31b obtained by flatly molding the two-divided half-divided bamboo material or the three-divided bamboo material. To be done.

The first coating material 101, the second coating material 102, and the base material 103 are laminated so that the first coating material 101 is superposed on the surface of the base material 103 so as to intersect the fiber directions thereof. The second coating material 102 is laid on the back surface of the base material 103 so as to intersect the fiber direction. The bamboo material 31b having a large strength in the fiber direction is reinforced in the mechanical strength by being arranged in a cross. And the thickness of the substrate 103 is about 5 mm
On the other hand, the thickness obtained by adding both the first covering material 101 and the second covering material 102 arranged in a cross to this is about 5 mm, and equalization of mechanical strength over the entire plate-shaped surface is achieved. . The first covering material 101 and the second covering material 102 are preferably arranged such that the bamboo members 31b, 31b, ... Are arranged in parallel in the longitudinal direction as shown in FIG. By covering the base material 103 on which a number of short bamboo materials are arranged with the first coating material 101 and the second coating material 102, which are arranged with a smaller number of bamboo materials on both sides, it becomes more difficult for the three to come off. is there. In other words, the base material 103 is the first coating material 101,
Since the length of the bamboo member 31b is shorter and the number of the bamboo member 31b is larger than that of the second covering member 102, the bamboo members 31b are not separated.

By the way, the bamboo used as a raw material for the first coating material 101, the second coating material 102, and the base material 103 is a general term for perennial evergreen woody book of the family Gramineae, and the kind thereof is not particularly limited, but it is a honeybee genus Hachiku. Is preferred. This is because the material is rigid and the distance between the nodes is wide. Moso bamboo has thick meat and a narrow gap between knots, which makes it somewhat inferior in workability. Bees have the following shapes and characteristics. Diameter is from 3 cm to 1
The distance is 0 cm, the distance between the nodes is as wide as 10 to 40 cm, and the height is about 8 to 20 m. Further, the growth of the length and the thickness is completed within 2 to 3 years after the occurrence, and the material after about 3 years from the occurrence becomes a good raw material for the laminated material 100. The bee is
It has high strength in the fiber direction and great rigidity. Specifically, the bending strength is 2000 kg / cm ² , and the compressive strength is 5
There is also from 00 to 800 kg / cm ² . The lauan material 1 has a bending strength of 910 kg / cm ² and a compressive strength of 480 kg / cm 2.
^{From 2} , it can be seen that the laminated material 100 made of bamboo has excellent mechanical strength. Although bamboo is abundant in the world, demand for bamboo products such as bamboo baskets is being pushed by plastic products made from petroleum resources, and their utility value is decreasing. Therefore, it is a resource that can be used easily and inexpensively.

In the present embodiment, the bamboo material 31b forming the laminated material 100 is not formed by flatly forming the bamboo such as the bees and used, but is used after being subjected to insect repellent / antiseptic treatment and oil removal. ing. Insect repellent and antiseptic made by Dainippon Timber Preservative Co., Ltd. were used. Also, coloring is applied as necessary. The purpose of removing oil is to enhance the effect of the adhesive.

The adhesives 105a and 105b are made of a bamboo material such as a first coating material 101, a second coating material 102, and a base material 10.
3 can be adhesively bonded to each other. Here, a bond (CH18 for woodworking or KU850 for water resistance) manufactured by Konishi Co., Ltd. was used as the adhesive 105a, 105b. This is a one-component urethane type adhesive and is preferable because it cures by utilizing moisture in the atmosphere or the like.

(2) Method for Manufacturing Laminated Material Next, a method for manufacturing a laminated material of the present invention will be described with reference to FIG. First of all, bamboo of a predetermined thickness is cut and cut at intervals of about 2 m,
The raw material is bamboo 30. The bamboo 30 is applied to a knotting machine 50 for an automatic dividing machine as a cutting means, and the inner knot is automatically removed while the bamboo 30 is vertically divided into two parts by a cutting blade 50a. Of course, the inner section and the bisection cutting may be performed separately. Further, the bamboo 30 may be divided into three or more instead of being divided into two.
However, regardless of the diameter, the width W of the bamboo material 31a becomes smaller as described above (FIG. 3), and when forming the first covering material 101 and the like, many bamboo materials 31b must be arranged, which is not so preferable. There is no.

Subsequently, the bamboo 31 (curved bamboo) half-divided by the automatic dividing machine knotting machine 50 is spread by the pressing machine 51 as the first compression means. Bamboo 31 is movable plate 50
By the compression operation of a, the bamboo 31 is pushed and spread while forming many cracks V on the inner peripheral surface side. Here, it is preferable to push open while heat-treating (warming the bamboo 31) because cracks are reduced. In such a case, as shown in FIG. 2, it is preferable to compress with the inner surface of the broken bamboo 31 facing upward.
This is because by heating the bamboo 31 by heat treatment, the bamboo 31 will naturally open from the half-split state to the flat state. When the heat treatment is not performed, it is preferable to place the bamboo 31 so that the curved surface faces up (the bamboo material 31 in FIG. 2 is inverted). In this embodiment, the pressing machine 51 is used for the pressure bonding.
You can push open. FIG. 3 shows a bamboo plate 31a that is opened by the press machine 51 and has a strip shape. The length of the bamboo 31 is kept at 2 m, and the outer peripheral length W is about 100 mm to 200 m.
Although the thickness 30 of the bamboo 30 is expanded to about m, the initial thickness t of the bamboo 30 is substantially maintained, but cracks V run in places in the longitudinal fiber direction.

If the bamboo material 31a is left as it is, the surface becomes dirty,
In addition, since the wall thickness t also varies, the unevenness of the bamboo material 31a is next removed by the automatic two-sided board 52 which is a cutting means. In this automatic two-sided plane 52, one plane is provided on each of the upper and lower sides of the table 52a, 52b, and the unevenness of the bamboo material 31a and the thickness reduction (about 5 mm) are performed at the same time. Bamboo material 31a
Passes through the automatic two-sided plane 52 and is cut flat and 5 m
The bamboo material 31b has a thickness of m.

The bamboo material 31b thus obtained is then subjected to an oil removing process. The bamboo material 31b is soaked in the oil removing hot water 61 to remove the oil. The oil removing storage tank 60 has a boiling water function for keeping the temperature of the oil removing hot water 61 constant. To remove the oil, remove the oil contained in the bamboo to create an adhesive 1
In addition to enhancing the effects of 05a and 105b, it is possible to prevent mold and rot. Then, the bamboo material 31b is dipped in the storage tank 62 containing the insect repellent 63, and the bamboo material 31b is subjected to insect repellent treatment. The insect repellent 63 prevents the bamboo material 31b from being eaten by insects such as bamboo beetles, and requires long-term insect repellent durability. Types of insect repellent 63 include boron compounds such as boric acid, fluorine compounds and the like as water-soluble inorganic compounds, and plectrine type as oil-soluble organic compounds.
In this example, insect repellent and antiseptic manufactured by Dainippon Wood Preservative Co., Ltd. were used as the insect repellent 63.

The bamboo material 31b that has been degreased and insect-proofed is then dried by a dryer 65 which is a drying means. The bamboo material 31b coming out is the first coating material 10 which is a component of the laminated material 100.
1, the second coating material 102 and the base material 103. This bamboo material 3
A plurality of 1b are arranged in parallel and close to each other, and both sides thereof are further adhered with an adhesive tape T having a width of 10 mm, about 2
Make a thin plate measuring mx 2m (Fig. 2). By the way, both end portions of each bamboo material 31b to which the adhesive tape T is attached are scraped off before the adhesive tape T is attached to become the first covering material 101 and the like, the adhesive tape T is above the surface. I try not to be. Here, oil removal, insect repellent treatment,
Although the steps are performed in the order of the drying process and the thin plate formation, these orders can be rearranged. Further, for example, the drying treatment can be performed twice after the oil removal treatment and after the insect control treatment.

The thin plates produced in this way are basically the same, and the first coating material 101, the second coating material 102, and the base material 103.
Can be After that, an adhesive is applied to the front surface and the back surface of the material selected as the base material 103. In this embodiment, an automatic gluing machine 70 (type: HGM-3 manufactured by Hasegawa Iron Works Co., Ltd.
5) Pass the base material 103 through. While passing through this device, the rotating rollers 70a and 70b apply adhesive to both front and back surfaces of the base material 103. As described above, the bond (CH18 for woodworking or KU850 for water resistance) manufactured by Konishi Co., Ltd. is used for the adhesives 105a and 105b. In particular, where water resistance is required, a water resistant KU850 type adhesive is used. If the adhesive is applied only to the two front and back surfaces of the base material 103, the first coating material 101 and the second coating material 102 can be integrated without applying the adhesive. Therefore, the thin plates selected as the first coating material 101 and the second coating material 102 are allowed to pass as they are without passing through the automatic gluing machine 70. Note that, instead of the above method, the adhesive may be applied to either the front surface or the back surface of the first coating material 101 and the second coating material 102, and the base material 103 may not be applied, although the efficiency is poor. Alternatively, the first coating material 101, the base material 103, and the second coating material 102 may all be applied to both of the surfaces that contact the joint surface.

Next, the first coating material 101 and the second coating material 102 are sandwiched so that the base material 103 coated with the adhesives 105a and 105b is placed in the center and the fiber directions of the base material 103 intersect with each other. And stack them.
Then, a plastic sheet 38 is intervened on each of them, and 300 thin plates (100 laminated materials 100
Is equivalent to). Plastic sheet 38
The adhesives 105a and 105b exude onto the first coating material 101 or the second coating material 102, and the adjacent laminated material 100
To avoid gluing with. Here, in superposing on the sandwich structure of the first coating material 101, the base material 103, and the second coating material 102, it belongs to the inside of the bamboo,
It is preferable to superimpose the first coating material 101 and the second coating material 102, in which many cracks V appear, on the side of the cracks toward the surface of the base material. This is because the extra adhesive is collected in the cracks V and the cracks V work effectively for adhesive bonding. In addition, there is an advantage that the crack V which is inferior in appearance is hidden inside. After that, the press machine 80 as the second compression means
Crimp with. The movable platen 80a descends and press-bonds the 300 thin plates, whereby the first coating material 101 and the second coating material 10 are formed.
2, the base material 103 is adhesively bonded, and the original plate 100G of the laminated material
Is completed. Note that, as described above, the adhesive tape T does not protrude above the surface of the first covering material 101 and the like during the compression process, so that the compression operation is not disturbed. The compression force by the press 80 is 10 kg / cm ^{2 to} 200 kg
/ Cm ² , more preferably 20 kg / cm ^{2 to} 50 kg
/ Cm ² . This is because if the compressive force is less than 10 kg / cm ² , a gap is created between the first coating material 101 (or the second coating material 102) and the base material 103. Also, the higher the compression force, the more the original plate 100G will be integrated, but 200 kg
This is because if it exceeds / cm ² , the compression means becomes large. Here, 25 kg / cm ² was adopted as the compression force.

After drying the original plate 100G for about 12 hours, the original plate 100G is placed on a planar 90 manufactured by Kikugawa Iron Works Co., Ltd. to cut the respective surfaces of the first coating material 101 and the second coating material 102. Polish at the same time. Original plate 100G that has passed through the planar heads 90a and 90b
Has a thickness of both the first coating material 101 and the second coating material 102 of about 2.5 mm, and the surface thereof is finished in a smooth and beautiful state. Then, with the circular saws 95a and 95c of the triple sizer, this 2000 mm × 2
Cut off both side edges of the 000 mm original plate 100G,
By dividing it in two with the circular saw 95b in the middle, 910 mm x 2
Two pieces of 000mm, and double sizer 95d,
The remaining side edges are cut off with 95e, and 910
The desired laminated material 100 having a size of mm × 1820 mm is obtained.

(3) Effects of Examples According to the method for manufacturing a laminated material having the above-described aspect, not only the bamboo 30 used as a constituent material of the laminated material 100 is distributed all over the world and is abundant as a resource, but also its growth. However, it does not lead to natural destruction like Lauan wood, because it has a strong regenerative ability as quickly as 1 to 3 years and grows one after another even if it is consumed in large quantities. Further, unlike the Lauan material, the bamboo 30 is resistant to water and excellent in mechanical strength, and maintains a long life even when used as a base material for a roof. The method of manufacturing the laminated material is different from the method of peeling the wrapping paper in a thin plate shape from the raw rawan wood so that the bamboo 30 can be opened and its thickness can be used as it is, so that the yield is good. In addition, since the thickness of the bamboo material 31b is large, sufficient strength can be secured by stacking three pieces,
Unlike the five-layer lauan laminated material, the adhesive 105a, 1
The area to which 05b is attached is only the base material 103, and the manufacturing process is simplified. Furthermore, the thickness of the base material placed in the center is 5 mm.
On the other hand, by finishing the thicknesses of the first coating material 101 and the second coating material 102 on both sides to be 2.5 mm each, the bamboos 30, which are said to be strong in the vertical fiber direction, are equally divided vertically and horizontally. As a result, uniform strength can be maintained over the entire surface. The first coating material 101, the second coating material 102, and the base material 103 all have a thickness of 5 at the thin plate stage.
Since it is the same as mm, it is not necessary to separately manage them, so that the production efficiency is good. And since bamboo doesn't get stuffy (steaming) like Lauan wood, in addition to the base material for the roof,
It is also suitable as a floor material. 12c of the above laminated material 100
Cut into m width, and process the male and female joints on the sides,
If the surface is treated with silicon, it becomes an excellent floor board that is extremely resistant to water. In addition, 5 mm from the edge of the laminated plate 100
The laminated plate 100 was not cracked even if nailing was performed only at a position inside. Not only the regular board, but also wood boards are likely to be cracked or chipped when nailed near the edges, but in the laminated board 100 of the present invention, the first coating material 101 and the base material in which the fiber direction is arranged in the cross direction. Since 103 and the second coating material 102 are integrated, no trouble such as cracking or chipping occurs. Therefore, the laminated board 100 is excellent in terms of construction work.

Further, in this embodiment, the half-divided bamboo material 31b is opened and used, so that the number of the bamboo materials 31b can be small when the base material 103 and the like are manufactured, and the work can be smoothly performed.
Then, by forming the cracks V, which are often generated on the inner peripheral surface side of the bamboo, toward the base material surface side to form the laminated material 100 having the sandwich structure, the adhesives 105a and 105b sufficiently adhere to the cracks V, so that the first coating Material 101, base material 103,
The adhesive bond of the second coating material 102 is strengthened.

The present invention is not limited to those shown in the above embodiment, but can be variously modified within the scope of the present invention depending on the purpose and application. The sizes, thicknesses, shapes, etc. of the first coating material 101, the second coating material 102, the base material 103, and the laminated material 100 are not limited to the examples, and can be appropriately selected. In the embodiment, a material of 2000 mm × 2000 mm is used as the original plate 100G, but a material of 1000 mm × 2000 mm can also be used. In the embodiment, the laminated material 10 having a three-layer structure is used.
However, the present invention is not limited to this, and the manufacturing process is complicated, but a laminated material having a multilayer structure may be used. The machine used for the manufacturing method of the laminated material 100 is an example, and other machines and tools capable of performing the operation can of course be used. The adhesives 105a and 105b and the insect repellent agent may be replaced with other ones that play the role. Further, such a laminated material 100 is not limited to being applied to a base material for a roof, and can be widely used for other building materials, construction materials and the like.

[0029]

As described above, the laminated material according to the present invention is manufactured.
As for the manufacturing method , by using bamboo, which grows quickly and is abundant as raw materials and is easy to procure, not only ensuring excellent durability and strength characteristics, but bamboo processing has been considered difficult. The curved bamboo that has just been split vertically is pressed to spread it while forming cracks, and then flattened to produce a product that has a high utilization rate of raw materials and is easily manufactured and processed. It has a great effect on improvement, productivity improvement, environmental protection, etc.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a partially cut product showing a laminated material according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a method for manufacturing a laminated material which is an embodiment of the present invention.

FIG. 3 is a partially enlarged perspective view of a bamboo material in a state where a half-split bamboo is pushed and spread.

FIG. 4 is a perspective view showing a conventional laminated material.

FIG. 5 is a system diagram showing a conventional laminated manufacturing method.

[Explanation of symbols]

 30 Bamboo 31 Half-divided Bamboo 31a Bamboo 31b Bamboo 50 50 Automatic dividing machine knotting machine (cutting means) 51 Press machine (first compression means) 52 Automatic two-sided plane (cutting means) 65 Dryer (drying means) V crack

Claims (1)

(57) [Claims] 1. A bamboo having a predetermined thickness is cut in a fiber direction by a cutting means, and then the curved bamboo is pressed and spread by a first compressing means to form a crack, which is then spread. Bamboo material is cut flat on the front and back by cutting means, and then oil is removed and insect repellent is applied.
After being dried by a drying means, a plurality of the bamboo materials are arranged in parallel and fixed at both ends thereof to form a base material, a first coating material, and a second coating material, and then, the front surface and the back surface of the base material, or An adhesive is applied to either the front surface or the back surface of the first coating material and the second coating material, and then the first coating material is placed so that the base material is centered and intersects with the fiber direction of the base material. And a method for producing a laminated material, in which the second coating material is superposed on the sandwich structure and pressure-bonded by the second compression means.