JP2002086617A - Plate material and its manufacturing method - Google Patents

Abstract

(57) Abstract: Provided is a plate material that uses an oriented strand board as a base material and has a smooth surface and can be subjected to secondary processing, and a method for producing the same. SOLUTION: Wood flour 50 parts by weight as a cellulosic material,
Polypropylene (P
P) 50 parts by weight of maleic acid-modified polypropylene and 2 parts by weight of a maleic acid-modified polypropylene as a compatibilizer were put into a stirring blade type mixer and stirred, whereby wood powder and polypropylene were uniformly melt-mixed to obtain a gel-like woody substance. A resin-based composition is produced, and the gel-like wood-based resin composition is placed on one surface of an oriented strand board having a thickness of 9 mm, and is cold-pressed with a press plate having a smooth press surface to obtain a thickness. A thickness of 1 mm is applied to the surface of the substrate 11 made of a 9 mm oriented strand board.
A 10 mm-thick plate material 1 on which a surface layer 12 made of a 1 mm-thick woody resin composition was laminated was manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate made of oriented strand board and a method for manufacturing the same, and more particularly to a plate having a smooth surface and a method for manufacturing the same.

[0002]

2. Description of the Related Art Building base materials such as floor base materials and wall stud base materials include:
A wood material that can be manufactured at a low cost is suitable, and specifically, an oriented strand board or the like obtained by accumulating a large number of strands and solidifying with an adhesive is used.

Recently, it has been desired to manufacture a decorative board or the like by sticking a surface decorative material such as decorative paper on the surface of a substrate formed of such an inexpensive oriented strand board. However, the oriented strand board is
As described above, since a large number of strands are stacked, the surface is not smooth but formed in an uneven shape. Therefore, even when a surface decorative material such as decorative paper is adhered to the surface of the base material formed in such an uneven shape, the thin surface decorative material is easily broken at the uneven portion formed on the surface of the base material, There is a problem that it is not possible to manufacture a decorative board or the like having commercial value.

[0004] For this reason, by smoothing the surface of the oriented strand board having irregularities, a surface decorative material such as decorative paper is adhered to the surface of the oriented strand board to produce a decorative board or the like. It is desired to enable the next processing.

[0005] As a method for smoothing the surface of wood,
After filling the recesses with the putty or the like, it is conceivable to scrape the surface of the putty or the like using a blade or the like. However, as described above, since the oriented strand board is formed by laminating a number of strands, When shaving the surface by
The strands exposed on the surface are easily peeled off, so that the surface cannot be smoothed after all.

As another method of smoothing the surface of the wooden material, it is conceivable to apply an aqueous leveling agent to the surface of the wooden material. However, an oriented strand in which strands having a certain size are laminated. Since the unevenness formed on the surface of the board was not uniform and the formed recesses were relatively large, even when an aqueous leveling agent was applied to the surface of the oriented strand board, it was formed on the surface. Since the recesses cannot be easily filled with the smoothing agent, and the moisture evaporates during drying, the smoothing agent becomes thinner.
There is a problem that perfect smoothing cannot be performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a plate material using an oriented strand board as a base material and having a smooth surface and capable of secondary processing, and a method of manufacturing the same.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method in which powdery or fibrous cellulose is added to a thermoplastic material on the surface of a substrate formed by an oriented strand board. Disclosed is a plate material characterized by laminating a smooth surface layer formed of a gel-like woody resin composition obtained by melting and mixing system materials.

The plate material constituted as described above is a gel-like woody resin composition obtained by melting and mixing a powdery or fibrous cellulosic material with a thermoplastic material on the surface of an oriented strand board having irregularities. Since the smooth surface layer formed by the above is laminated, it is possible to perform secondary processing such as sticking a surface decorative material such as decorative paper on the surface,
It is possible to manufacture a decorative board or the like having a high commercial value by using an inexpensive oriented strand board.

In particular, as in the plate material according to claim 2, the wood-based resin composition forming the surface layer contains at least 2 parts by weight of a compatibilizer with respect to 100 parts by weight of the wood-based resin composition. When added, the peel strength of the surface layer laminated on the surface of the substrate formed by the oriented strand board increases, forming a plate material in which the surface layer is difficult to peel from the oriented strand board as the substrate. It is possible to do.

[0011] The plate material constituted as described above is a gel-like wood material obtained by melting and mixing a powdery or fibrous cellulosic material with a thermoplastic material and the surface of a substrate formed by an oriented strand board. It can be manufactured by the method for manufacturing a plate material according to claim 3, wherein a smooth surface layer is laminated on the surface of the base material by coating with a base resin composition and pressing this.

The above-mentioned "cellulosic material" includes PB chips, dry refiner chips, wet refiner chips, virgin MDF fiber, plywood sander dust, PB sander dust, MDF sander dust, waste MDF fiber, plywood sawdust, and PB chips. Sawdust, MDF
Sawdust can be used, and the particle diameter or fiber length is 3
cm × 3 cm or less is preferred. In addition, the above-mentioned cellulosic materials may be used as a single type or as a mixture of a plurality of types.

The above-mentioned "thermoplastic material" includes polypropylene (PP), polystyrene (PS), polyethylene (PE), polyethylene terephthalate (PET), acrylonitrile butadiene styrene copolymer (ABS), polyvinyl chloride (PVC) or the like or these waste plastics can be used alone or in a mixture of a plurality of types, and a small amount of a thermosetting plastic material may be mixed in these thermoplastic materials. When the thermoplastic plastic material and the cellulosic material are melt-mixed, it is generally performed in a state in which the thermoplastic plastic material is finely pulverized. This is because, even if it is dispersed in the thermoplastic resin material in a molten state together with the cellulosic material, the physical properties of the surface layer are not significantly affected.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings and tables, but the plate material of the present invention and its manufacturing method are not limited to these embodiments.

(Example 1) As shown in Table 1, 50 parts by weight of wood flour as a cellulosic material and 50 parts by weight of polypropylene (PP) as a thermoplastic material were charged into a stirring blade type mixer and stirred. Thus, a gel-like woody resin composition in which wood flour and polypropylene were uniformly melt-mixed was manufactured, and as shown in FIG. As shown in FIG. 2 (b), it is placed on one side of an oriented strand board M having a thickness of 9 mm and cold-pressed by a press plate P having a smooth press surface to form a 9 mm-thick as shown in FIG. A 10 mm-thick plate material 1 in which a surface layer 12 made of a wood-based resin composition having a thickness of 1 mm was laminated on one surface of a base material 11 made of an oriented strand board.

Example 2 As shown in Table 1, a gel-like wood-based resin composition was prepared in the same manner as in Example 1 except that 1 part by weight of maleic acid-modified polypropylene was added as a compatibilizer. 1 (a), the gel-like wood-based resin composition C was placed on one surface of an oriented strand board M having a thickness of 9 mm, and smoothed as shown in FIG. 1 (b). The base material 11 made of oriented strand board having a thickness of 9 mm as shown in FIG. 2 is subjected to cold-pressing with a press plate P having a suitable pressing surface to form a surface made of a wood-based resin composition having a thickness of 1 mm on one side. The plate material 1 having a thickness of 10 mm on which the layer 12 was laminated was manufactured.

Example 3 As shown in Table 1, a gel-like wood-based resin composition was prepared in the same manner as in Example 1 except that 2 parts by weight of maleic acid-modified polypropylene was added as a compatibilizer. 1 (a), the gel-like wood-based resin composition C was placed on one surface of an oriented strand board M having a thickness of 9 mm, and smoothed as shown in FIG. 1 (b). The base material 11 made of oriented strand board having a thickness of 9 mm as shown in FIG. 2 is subjected to cold-pressing with a press plate P having a suitable pressing surface to form a surface made of a wood-based resin composition having a thickness of 1 mm on one side. The plate material 1 having a thickness of 10 mm on which the layer 12 was laminated was manufactured.

Example 4 As shown in Table 1, a gel-like wood-based resin composition was prepared in the same manner as in Example 1 except that 5 parts by weight of maleic acid-modified polypropylene was added as a compatibilizer. 1 (a), the gel-like wood-based resin composition C was placed on one surface of an oriented strand board M having a thickness of 9 mm, and smoothed as shown in FIG. 1 (b). By cold pressing with a press plate P having a suitable press surface, a surface made of a 1 mm thick woody resin composition is formed on a surface of a base material 11 made of an oriented strand board having a thickness of 9 mm as shown in FIG. The plate material 10 having a thickness of 10 mm on which the layer 12 was laminated was manufactured.

With respect to the plate 1 of each of the above-described embodiments, JI
A peel strength test was performed according to SA-5095 to evaluate the adhesion between the substrate 11 made of oriented strand board and the surface layer 12 made of the wood-based resin composition. Table 1 shows the results.

[0020]

[Table 1]

As described above, the plate material 1 of each embodiment is obtained by placing a gel-like wood-based resin composition obtained by melting and mixing a powdery or fibrous cellulosic material on a thermoplastic plastic material and cold-pressing the same. As a result, the smooth surface layer 12 was laminated on the surface of the oriented strand board,
Uneven and relatively large recesses formed on the surface of the oriented strand board can be reliably filled with the wood-based resin composition, and when the surface is smoothed using a smoothing agent as in the related art, Compared with this, smoothing can be performed accurately and reliably.

Therefore, even if a thin surface decorative material such as decorative paper is adhered to the surface layer formed by the woody resin composition,
Manufacture of high-product-value decorative boards by applying various secondary processes to the surface of a base material made of inexpensive oriented strand boards without the surface decorative material attached being easily broken. It is possible to do.

As can be seen from Table 1, the surface layer 12
When a wood-based resin composition is formed, a compatibilizing agent such as maleic acid-modified polypropylene is added,
The peel strength of the surface layer 12 made of the wood-based resin composition with respect to the oriented strand board as the base material 11 is increased, and a practical plate material 1 in which the surface layer 12 is difficult to peel from the base material 11 is formed. Can be.

However, when the amount of the compatibilizing agent is less than 2 parts by weight based on 100 parts by weight of the wood-based resin composition as in the plate 1 of Example 2, sufficient peel strength cannot be obtained. Further, as in the case of the plate material 1 of Example 4, even if the compatibilizer is added in an unnecessarily large amount, the peel strength does not increase, so the amount of the compatibilizer added is suppressed to about 2 parts by weight. It is desirable to keep it.

In each of the above-described embodiments, the surface layer is laminated by flat pressing with the gel-like wood-based resin composition placed on the surface of the oriented strand board. However, the present invention is not limited to this. Instead, it is also possible to continuously form a surface layer by roll-pressing while extruding the gel-like wood-based resin composition on the surface of the oriented strand board in a sheet shape.

In each of the above embodiments, the thickness is 9 mm.
The surface layer 12 having a thickness of 1 mm is formed on one surface of the substrate 11 made of the oriented strand board of the present invention. However, the present invention is not limited thereto. It may be appropriately set in consideration of the surface properties of the oriented strand board to be used, the use of the manufactured plate material, and the like.

In each of the above-described embodiments, the surface layer 12 is laminated on one side of the base material 11 made of an oriented strand board. However, the present invention is not limited to this. It is also possible to laminate a surface layer formed of a wood-based resin composition on both the front and back surfaces of the base material, thereby suppressing the warpage of the entire plate material and reliably suppressing moisture absorption and desorption from both front and back surfaces. Therefore, it is possible to form a plate having excellent dimensional stability.

Further, a surface layer is laminated on one side of a base material made of oriented strand board, and one or a plurality of wooden edges are covered with a similar surface layer, so that the substrate is used for manufacturing a shelf board or a counter material. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a process chart showing a method for manufacturing a plate material according to the present invention.

FIG. 2 is a cross-sectional view showing a plate material manufactured by the above manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Board material 11 Base material 12 Surface layer C Woody resin composition M Oriented strand board P Press board

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) E04C 2/16 E04C 2/16 E // B29C 43/18 B29C 43/18 B29K 1:00 B29K 1:00 B29L 31:58 B29L 31:58 (72) Inventor Akira Nakamura 2-10-60 Hirabayashiminami, Suminoe-ku, Osaka City, Osaka Prefecture F-term within Eidai Sangyo Co., Ltd. 2B260 AA12 BA20 CA10 CB04 CD03 CD04 EA11 EB06 EB19 2E162 CC01 EA08 EA18 4F100 AJ04B AK01B AK07 AK07H AL05B AL07 AL07H AP03A AT00A BA02 CA30 DE01B DG01B EH23 EH232 EJ20 EJ202 GB08 JB16B JL01 4F204 AA11 AA11J AB25 AD06 AH48 FA18 FB01 FB13 FB24 FE30 FF21 FG02 FG08 FH06 FJ09 FN09 FN11 FN15 FW15 FW23 FW26 4J002 AH00X BB02W BB12W BB213 BC03W BD04W BN15W CF06W FA04X FD203 GL01

Claims (3)

[Claims] 1. A smooth surface formed by a gel-like wood-based resin composition obtained by melt-mixing a powdery or fibrous cellulosic material with a thermoplastic material on a surface of a substrate formed by an oriented strand board. A plate material characterized in that various surface layers are laminated. 2. The woody resin composition forming the surface layer, wherein at least 2 parts by weight of a compatibilizer is added to 100 parts by weight of the woody resin composition. Plate material. 3. A gel-like wood-based resin composition in which a powdery or fibrous cellulosic material is melt-mixed with a thermoplastic material on a surface of a substrate formed by an oriented strand board, A method of manufacturing a plate material in which a smooth surface layer is laminated on the surface of the base material by pressing this.