JPH11129218A - Structural facing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize free use at an arbitrary location without being influenced by an ambient environment by a method wherein a dimensionally stability-treated orientating strand board is used. SOLUTION: A flat plate-like orientating strand board (hence forth expressed as OSB) 1 as a treated material is placed at the position, at which fine holes 3b are present, on a bottom press platen 1b. After that, the press platens 1a and 1b are brought close to each other until to be controlled by a thickness controlling jig 10 and stopped. The OSB 1 is housed in the enclosed space within the thickness controlling jig 10 between the top press platen 1a and the bottom press platen 1b so as to be heated with heaters 2a and 2b or evacuated through the fine holes 3b on the bottom press platen 1b with a vacuum pum VP. When the predetermined reduced pressure is attained, the evacuation is stopped and then high pressure steam is jetted from a high pressure steam generating source S through a piping 4a and the fine holes 3a. The high pressure steam is easily and uniformly attained within the OSB 1, resulting in applying the desired dimensionally stabilizing treatment. Accordingly, the resultant board has high strength and dimensional stability. Its execution is easy. The development of a defect due to the falling or resin during the execution can be suppressed, resulting in allowing to save the cost of material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a building,
The present invention relates to a structural face material serving as a substrate on which a surface decorative material such as a flooring, a carpet, and a decorative waistboard is laid.

[0002]

2. Description of the Related Art In a building, for example, when making a floor surface, a floor base material such as a floor plate is attached to the whole surface using a joist arranged on a large pulling as a support material, and a surface such as a flooring or a carpet is placed thereon. Cosmetic materials are laid. The same applies to the case of a wall surface, in which a siding panel is struck against a body edge as a wall base material, and a surface decorative material such as a decorative waistboard is mounted thereon. Conventionally, plywood is generally used for a structural face material used as a base material, since it is required to have not only strength but also surface smoothness and stability.

In recent years, fiber boards and particle boards have been frequently used as structural surface materials as wood-based building materials. However, since they are inferior to plywood in terms of strength, they are as high as floor base materials. It is not often used as a structural facing in places where loads are applied. In addition, swelling and shrinking due to moisture, particularly in the thickness direction, is remarkable, and there is a disadvantage that unevenness due to aging changes is noticeably generated. As another wood-based building material, there is an oriented strand board (OSB). OSB is a very effective material as a structural surface material on one side because it has a higher strength than a fiber board or a particle board, and a large-sized board can be obtained.

[0004]

However, OSB has problems such as lack of dimensional stability and uneven surface, and has a disadvantage that the place of use is limited. For example,
When OSB is used as a structural surface material in a place where it is exposed to high humidity for a long time or where it is exposed to water, the dimensional change including swelling in the thickness direction is large. It was not used as a floor covering including the floor. Also, even when used as a structural surface material in a specific limited place, it is necessary to keep the place well-ventilated and free from rainwater, etc. Had made it difficult.

[0005] Even when mounting, adjacent boards must be arranged at intervals of about 3 mm in order to prevent the spliced portion from rising due to elongation after construction, and required heat insulation cannot be obtained. And other inconveniences. Further, the flooring or carpet cannot be stably laid because of lack of surface smoothness. For example, if OSB is installed as a flooring material and it is rained during construction, the surface of the OSB will be uneven, and the work of polishing the surface with a sander or the like before laying flooring or carpet etc. Required.
An object of the present invention is to solve the above-mentioned inconveniences and to provide a structural panel made of OSB which can be freely used at any place without being affected by the surrounding environment.

[0006]

According to the present invention, there is provided a structural face material comprising an oriented strand board (OSB) which has been subjected to a dimensional stabilization treatment. By subjecting OSB to a dimensional stabilization process in advance, a high-strength and large-area structural face material can be easily obtained, and the structural face material undergoes dimensional change even in a high humidity environment. Since there is no board, adjacent boards can be attached in close contact with each other, so that it is not only easy to lay the flooring, carpet and the like after the fact, but also the heat insulating effect is not reduced. The same applies to the case where this structural face material is used as a wall base material or a roof base material.

[0007] The dimensional stabilization treatment applied to the OSB is optional, but the OSB is accommodated in a closed space, preferably without any voids, and heated and / or high-pressure steam is supplied from the outside. Therefore, it is an effective processing mode to make the space a high-pressure steam atmosphere and thereby perform a dimensional stabilization process. At this time, high-pressure steam may be supplied from the outside after the inside of the closed space is depressurized. The closed space may be a closed space formed by a conventional pressure-resistant pressure vessel for processing wood materials, and a press plate attached to a flat plate press conventionally used for pressing wood materials and manufacturing composite materials. It may be a closed space formed between them. The heating source for the enclosed space is arbitrary, but may be a dryer, a hot plate press, steam heating of the container, electric heating such as a band heater, microwave, high frequency heating, or the like. Further, the temperature of the enclosed space may be raised in advance, or the OSB itself may be heated in advance. The high-pressure steam supplied to the closed space may be saturated steam or superheated steam.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows an example of an apparatus for producing a structural face material made of OSB of the present invention. In FIG. 1, reference numeral 1 denotes an OSB having a required size manufactured by a conventionally known manufacturing method, and a dimensional stabilization process is performed on the OSB1.

Reference numerals 1a and 1b denote press boards similar to those mounted on a flat plate press used in conventional wood processing, each of which is provided with heaters 2a and 2b as heat sources, and furthermore, a large number of heaters are provided on the surface portion. Pores 3a, 3b are formed. The pores 3a formed in the upper press platen 1a are connected to a high-pressure steam generation source S via a pipe 4a and an on-off valve V, and the pores 3b formed in the lower press platen 1b are connected via a pipe 4b. Connected to the vacuum pump VP. A blower (not shown in FIG. 1) may be used instead of the vacuum pump. Further, a thickness regulating jig 10 is attached to the upper press platen 1a by appropriate fixing means (not shown). Reference numeral 11 denotes an elastic packing provided on the upper edge and the lower edge of the thickness regulating jig 10 to maintain the airtightness.

The plate-like OSB 1 as a processing material is placed on the lower press platen 1b, preferably at a position where the pores 3b are formed, and then the press plates 1a and 1b are removed by the thickness regulating treatment. Approach and stop until restricted by tool 10. Thereby, the OSB 1 is accommodated in the closed space in the thickness regulating jig 10 between the upper press platen 1a and the lower press plate 1b. An elastic sealing material (not shown) may be arranged around the OSB 1 to increase the degree of sealing between the press plates 1a and 1b.

In this state, heating may be performed by the heaters 2a and 2b, or a vacuum pump VP (or blower) is operated to evacuate the fine holes 3b formed in the lower press platen 1b. The inside of the sealed space is decompressed, and when a predetermined decompression is obtained, the evacuation is stopped, the on-off valve V provided on the pipe 4a on the high-pressure steam generation source S side is opened, and the pores 3a formed on the press platen 1a are opened. High-pressure steam may be ejected from the nozzle. High-pressure steam may be supplied without performing evacuation.

In the enclosed space, a high-pressure steam atmosphere is formed by converting the water content of the OSB1 into high-pressure steam, or supplied high-pressure steam, or both, so that the high-pressure steam can easily and easily reach the inside of the OSB1. The uniformity is reached and the desired dimensional stabilization treatment is performed. After the jetting of the desired amount of high-pressure steam is completed, the decompression and cooling steps by releasing high-pressure steam to the atmosphere are performed in the same manner as in the conventional method. finish.

FIG. 2 shows another example of an apparatus for performing dimensional stabilization processing on OSB1. Here, a first plate-shaped separate member 20a having pores 23a for ejecting steam is fixed to the upper press platen 1a using screws 21a, and further a plate-shaped first member 20a having pores 23b for evacuation is formed. A second separate member 20b is connected to a lower press platen 1b using a screw 21b.
It is fixed to. And each of the pores 23a, 2
3b is connected to the high-pressure steam generation source S and the vacuum pump VP as in the case of the apparatus shown in FIG.

A thickness regulating jig 10 having elastic packings 11 on the upper edge and the lower edge is attached to the first flat member 20a by an appropriate fixing means. In addition, the thickness regulating jig 10 has a large number of pores 10a opened on the inner peripheral surface side.
Are formed, and the pores 10a are connected to a high-pressure steam generation source S via a pipe 4a. The method of using this device is substantially the same as that of FIG. 1, except that high-pressure steam is formed in a pore 10a located at a position close to the side surface of the OSB1 formed on the inner peripheral surface side of the thickness regulating jig 10. , The high-pressure steam supplied therefrom can easily enter the inside of the OSB1 from the cleave surface, and uniform and rapid high-pressure steam treatment proceeds.

FIG. 3 shows still another example of an apparatus for performing dimensional stabilization processing on OSB1. This device is
The second separate member 30b is a bottomed box-shaped pressure-resistant container having an open space 35 whose upper side is open, and a large number of pores 33c are formed on the inner peripheral surface side of the open space 35. Hole 33
c is connected to a vacuum pump VP via a pipe 4b.
A packing 36 is provided on the upper end surface of the second separate member 30b.
Is attached. In this device, the thickness regulating jig 1
A sealed space can be easily formed between the press plates without separately arranging a sealing material or a sealing material. Further, in a sealed state, the open space 35 is a pore opened on the inner peripheral surface side. Since evacuation is also performed from 33c, there is an advantage that the pressure in the closed space can be quickly reduced.

FIG. 4 shows still another example of an apparatus for performing dimensional stabilization processing on OSB1. Compared to the apparatus shown in FIG. 2, the second separate member 30b is a box-shaped pressure-resistant container having an open space 35 with an open upper side, and the first separate member 30a It is different in that it has an insertion protrusion 31a having a cross section substantially the same as the cross section of the space 35, and the pore 33a reaches the tip end surface of the insertion protrusion 31a. Then, the first separate member 30
A packing 36 is attached around the convex portion 31a. In this apparatus, a closed space can be easily formed between the press plates, and the distance between the press plates 1a and 1b can be easily adjusted even for OSBs 1 having different thicknesses. It is possible to do.

FIG. 5 shows still another example of an apparatus for performing dimensional stabilization processing on OSB1. In this example,
A mesh made of a material having heat resistance and pressure resistance, such as a wire mesh, is fixedly attached to the surfaces of the press boards 1a and 1b. Due to the presence of the mesh, the OSB surface and the press platen 1
Vacuuming between the surfaces of a and 1b is facilitated, and
Dispersion of the supplied high-pressure steam becomes good, and uniform processing can be performed in a short time. Instead of attaching the net 61 to the press plates 1a and 1b, it may be simply disposed on the lower press plate 1b or on the upper surface of the OSB 1 so as to be detachable.

Although not shown, the pores 10a formed on the inner surface side of the thickness regulating jig 10 can be connected to a vacuum source VP to evacuate the side of the thickness regulating jig. This may be performed independently, or may be performed in parallel with evacuation from the upper and lower press boards 1a and 1b. Further, in the case of the apparatus shown in FIG. 3, it is also possible to connect the pore 33c formed on the inner side surface of the second separate member 30b to the high-pressure steam generation source S and supply the high-pressure steam from the side surface. is there. Further, although not shown, also in the case of the apparatus shown in FIG. 4, a large number of pores are formed on the inner side surface of the second separate member 30b, and the pores are formed in the vacuum source VP and / or the high-pressure steam source S. It is also possible to connect and supply vacuum and / or high pressure steam from its side.

The OSB 1 subjected to the dimensional stabilization processing as described above can be used as a flooring material,
It is used as a wall base material or a roof base material. FIG.
Is an example in which OSB1 subjected to the dimensional stabilization processing is used as a floor base material.
B1 is laid in close contact with appropriate means, and a flooring material F is laid thereon by means such as sticking. OSB1 that has been subjected to dimensional stabilization processing as a floor base material is
In addition to having high strength, even if exposed to a high humidity environment for a long time, there is little dimensional change including swelling in the thickness direction. Even if it is raining inside, the surface does not become uneven, so troublesome precautions at the time of construction are eliminated and the construction period is shortened. Of course, the use as a floor base material is an example, and it can be explained that a similar effect can be obtained even when used as an arbitrary building surface material used in a conventional building such as a wall base material or a roof base material. Will not be required.

[0020]

【Example】

(Example 1) A 12 × 600 × 1200 mm OSB (aspen, powdered phenol adhesive) is placed in a 12.5 × 630 × 1250 mm pressure-resistant container to be in a closed state.
Saturated steam at 200 ° C. (15 kgf / cm ² ) was introduced into the container, and high-pressure steam treatment was performed for 20 minutes to obtain Example Product 1. (Comparative Example 1) The same material as in Example 1 was used, but Comparative Example 1 was obtained without performing the treatment of Example 1.

(Embodiment 2) 20 × 930 × 1820 mm
18 × 900 × 1800mm OSB into a pressure vessel
(Aspen, black poplar, liquid phenol adhesive)
And place it in a sealed state. 203 ° C (16 ° C)
kgf / cm ² ) of saturated steam was introduced, and high-pressure steam treatment was performed for 15 minutes to obtain Example Product 2. (Comparative Example 2) The same material as in Example 2 was used, but Comparative Example 2 was obtained without performing the treatment of Example 2.

<Evaluation> The following water absorption test, bending test, and nail joint shear test were performed for each. Water absorption test: test piece: 50 × 50 mm Test method: immersed in water at 20 ° C. for 24 hours, and the thickness swelling ratio (%) is determined from the thickness before and after immersion. Thickness swelling ratio = (x ₁ −x ₀ ) / x ₀ × 100 (%) x ₁ … thickness after immersion, x ₀ … thickness before immersion

Bending test: Test piece: 300 × 400 mm Test method: The test piece was bent and broken by applying a load P from the center of the span distance L, and the bending strength at break was determined by the following equation. Flexural strength = 3PL / 2bh ² (kgf / cm ² ) P: maximum load (kgf), L: span (cm), b: width of test piece (cm), h: thickness of test piece (cm)

Nail joint shear test: Test pieces: Two pieces each having a size of 100 × 300 mm are prepared. Test method: After nailing a test specimen with nails on both sides of a structural material having a thickness of 38 mm, a width of 89 mm, and a length of 300 mm so that a space can be formed in the lower part, compress the specimen parallel from above to the maximum. The proof stress (kg f / cm ² ) was measured. Table 1 shows the test results.

[0025]

[Table 1] As shown in Table 1, OSB was provided with high dimensional stability.

(Example 3) Each of them was placed in close contact with a joist as a floor substrate, and then water was sprayed by spraying and left as it was. Immediately after spraying, water was repelled by the wax effect, and no change in the surface was observed in Examples 1 and 2 and Comparative Examples 1 and 2, but after 24 hours, the water crossed over the wax and was absorbed inside. . At that time, the products of Examples 1 and 2 had no change in the surface, whereas the products of Comparative Examples 1 and 2 had a dull surface and swelling at the joint was observed.

[0027]

According to the structural face material of the present invention, in addition to having high strength, it has high dimensional qualities.
The construction is easy, and the occurrence of defects due to rainfall during the construction is also suppressed, and it is possible to use the structural surface material made of OSB even in the parts that have not been used until now, thus reducing material costs. Brought.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of an apparatus that performs a dimensional stabilization process on an OSB.

FIG. 2 is a diagram illustrating another example of an apparatus that performs a dimensional stabilization process on OSB.

FIG. 3 is a diagram showing still another example of an apparatus for performing a dimensional stabilization process on OSB.

FIG. 4 is a diagram showing still another example of an apparatus for performing a dimensional stabilization process on OSB.

FIG. 5 is a diagram showing still another example of an apparatus for performing a dimensional stabilization process on OSB.

FIG. 6 is a view showing a construction state when a structural surface material made of OSB according to the present invention is used as a flooring material.

[Explanation of symbols]

1. OSB (Oriented Strand Board), 1a, 1b ...
Press board, 2a, 2b: heater, 3a: high pressure steam jetting pore, 3b: vacuum evacuation pore, 4a: high pressure steam supply pipe, 5b: vacuum evacuation pipe, 10: thickness regulating jig,
S: high-pressure steam supply source, VP: vacuum pump, N: joist,
F ... Flooring material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsufumi Miyata 2-10-60 Hirabayashiminami, Suminoe-ku, Osaka-shi, Osaka Inside Eidai Sangyo Co., Ltd. 2-10-60 Eidai Sangyo Co., Ltd.

Claims (5)

[Claims] 1. A structural face material comprising an oriented strand board subjected to a dimensional stabilization treatment. 2. The structural face material according to claim 1, wherein the oriented strand board is an oriented strand board which has been subjected to a dimensional stabilization treatment by a heating steam treatment in advance. 3. The oriented strand board contains the oriented strand board in a closed space, and heats the oriented strand board to convert the water contained in the oriented strand board itself into high-pressure steam, and / or 2. The structural face material according to claim 1, wherein the oriented strand board is supplied with high-pressure steam from the outside and subjected to dimensional stabilization treatment by heating steam treatment. 4. An oriented strand board which has been subjected to dimensional stabilization treatment by heating steam treatment by supplying high-pressure steam from the outside after reducing the pressure in an enclosed space. The structural face material according to claim 3, characterized in that: 5. The structural face material according to claim 1, which is a floor material, a wall material, or a roof material.