JP2018052019A - Incombustible wood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the exfoliation of veneer and prevent the occurrence of efflorescence.SOLUTION: An incombustible wood 20 has a woody base material 10 impregnated with a water-soluble flame retardant, and a veneer 13 provided on one surface side of the woody base material 10 through an adhesion layer 12. Between the woody base material 10 and the adhesion layer 12, provided is a moisture unpermeable layer 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to incombustible wood.

  Non-combustible wood impregnated with a phosphoric acid flame retardant has been widely known. For example, Patent Document 1 discloses a flame-retardant wood material in which a wood board is impregnated with a flame retardant aqueous solution and dried, and then a wood veneer is bonded using an adhesive.

JP-A-2-270547

  By the way, in the non-combustible wood impregnated with the flame retardant, there is a possibility that a phenomenon called white flower that the water-soluble flame retardant exudes and crystallizes on the surface may occur. Here, in the flame-retardant woody material disclosed in Patent Document 1, the exudation of the flame retardant generated in the wood board material reaches the wood veneer, and the phenomenon of white flower occurs on the surface of the wood veneer. At the same time, the flame retardant deteriorates the adhesive, and the wood veneer (projection board) may be peeled off.

  This invention is made | formed in view of this point, and the place made into the objective is to suppress generation | occurrence | production of a white flower while suppressing peeling of a veneer.

  In order to achieve the above object, in the present invention, a moisture-impermeable layer is provided between the wooden substrate and the adhesive layer.

  Specifically, a nonflammable decorative board according to the present invention includes a wooden base material impregnated with a water-soluble flame retardant, and a veneer provided on one surface side of the wooden base material via an adhesive layer. Non-combustible wood, characterized in that a moisture-impermeable layer is provided between the wooden substrate and the adhesive layer.

  According to the above configuration, since the moisture-impermeable layer is provided between the wooden substrate and the adhesive layer, the moisture-permeable movement of the flame retardant impregnated in the wooden substrate to the veneer side is prevented. Can be blocked. Thereby, since the seepage of the flame retardant to the veneer can be suppressed, the generation of white flower can be suppressed. Furthermore, since the deterioration of the adhesive layer due to the seepage of the flame retardant can be suppressed, it is possible to suppress the peeling of the veneer. Accordingly, it is possible to suppress peeling of the protruding plate and to suppress generation of white flower.

  The moisture impermeable layer may be made of a coating film.

  According to said structure, since a non-breathable layer consists of a coating film, a non-breathable layer can be formed at low cost and a low-cost incombustible wood can be implement | achieved.

  The veneer may consist of a hardwood veneer.

  According to said structure, since a veneer consists of a single board of hardwood, the nonflammable wood by which the grain of hardwood which is hard to be impregnated with a flame retardant was formed is realizable. In addition, since hardwood is difficult to penetrate the hardwood, even if the flame retardant impregnated in the wooden base material penetrates the moisture-impermeable layer, it can suppress the seepage of the flame retardant to the veneer, Generation of white flower can be suppressed.

  The flame retardant may be a boric acid flame retardant.

  According to said structure, since a flame retardant is a boric-acid type flame retardant, the wooden base material which impregnated the flame retardant can be formed at low cost, and a low-cost incombustible wood can be implement | achieved.

  The wooden substrate may be a single plate laminate.

  According to said structure, since a wooden base material is a single board laminated material, a wooden base material can be formed at low cost and a low-cost incombustible wood can be implement | achieved.

  According to the present invention, since the non-moisture permeable layer is provided between the wood base material and the adhesive layer, it is possible to suppress peeling of the veneer and to suppress generation of white flower.

It is sectional drawing of the nonflammable wood which concerns on embodiment of this invention. It is sectional drawing of the test body of the Example of the nonflammable wood which concerns on embodiment of this invention. It is sectional drawing of the test body of a comparative example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.

  FIG. 1 is a cross-sectional view of a non-combustible wood 20 according to this embodiment.

  As shown in FIG. 1, the incombustible wood 20 includes a wood base material 10, a non-moisture permeable layer 11 provided on the wood base material 10, an adhesive layer 12 provided on the non-moisture permeable layer 11, And a protruding plate 13 provided on the adhesive layer 12.

  The woody base material 10 is, for example, a solid material, plywood, laminated material, or veneer laminated material having a thickness of about 12 mm to 50 mm and impregnated with a water-soluble flame retardant such as a phosphoric acid flame retardant or a boric acid flame retardant. (LVL: Laminated Veneer Lumber) and the like.

  For example, the moisture-impermeable layer 11 is formed of a coating film made of, for example, a urethane resin having a thickness of about 20 μm to 100 μm. Here, the moisture-impermeable layer 11 may be any layer as long as no hole communicating in the thickness direction is formed so that moisture does not permeate. For example, a resin sheet or film, a metal foil, a metal vapor deposition film, or the like. Etc. In addition, although the moisture-impermeable layer 11 is preferably one that does not allow moisture to permeate, it may be one that allows moisture to permeate to some extent, as long as it is excellent in moisture permeability.

  The adhesive layer 12 is made of, for example, an aqueous adhesive such as an aqueous polymer isocyanate adhesive.

  The protruding plate 13 is constituted by, for example, a single plate of softwood (cedar, cypress, etc.) or hardwood (beech, oak, etc.) having a thickness of about 0.2 mm to 3.0 mm.

  The non-combustible wood 20 having the above-described configuration is constructed in a building where a wood-grained design is required in addition to non-combustibility (for example, kitchen hanging doors, storage wall materials, store interior materials, hall interior materials, etc.). Used as a plate-like or rod-like building material.

  Next, a specific experiment will be described. Here, FIG. 2 is a cross-sectional view of the test body Sa of the example of the non-combustible wood 20. Moreover, FIG. 3 is sectional drawing of the test body Sb of a comparative example.

  First, as examples and comparative examples of the present invention, specimens Sa and Sb having the following configurations were respectively produced.

As shown in FIG. 2, the test body Sa includes a wood base material 10e, a non-moisture permeable layer 11e provided on the wood base material 10e, and an adhesive layer 12e provided on the non-moisture permeable layer 11e. ing. Here, the wooden substrate 10e is made of cedar wood having a thickness of 15 mm impregnated with about 350 kg / m ³ of a phosphoric acid flame retardant. In addition, the moisture-impermeable layer 11e is made of a urethane resin having a thickness of about 50 μm painted on the surface of the wooden substrate 10e. In addition, the other surface in which the moisture-impermeable layer 11e of the wooden base material 10e is not provided is coat | covered with the tape made from aluminum. The adhesive layer 12e is composed of an aqueous polymer isocyanate adhesive having a thickness of about 40 μm applied to the surface of the moisture-impermeable layer 11e. In addition, in order to make it easy to confirm the crystal of the deposited flame retardant, the test body Sa has a configuration in which the protruding plate 13 is omitted from the non-combustible wood 20.

  As shown in FIG. 3, the test body Sb includes a wood base material 10e and an adhesive layer 12e provided on the wood base material 10e. In the test body Sa, the moisture-impermeable layer 11e is omitted. ing.

  Further, the specimens Sa and Sb having the above-described configuration are cured for a predetermined period in a thermostatic chamber set to a temperature of about 27 ° C. and a relative humidity of about 80%, and the surface state of each adhesive layer 12e of the specimens Sa and Sb is determined. Observed.

  As an experimental result, when the curing period exceeded about 5 weeks, a lot of flame retardant crystals were deposited on the surface of the adhesive layer 12e of the comparative specimen Sb without the moisture-impermeable layer 11e. On the surface of the adhesive layer 12e of the test specimen Sa of the example having the moisture permeable layer 11e, almost no flame retardant crystals were observed.

  As described above, according to the non-combustible wood 20 of the present embodiment, since the moisture-impermeable layer 11 is provided between the wood base material 10 and the adhesive layer 12, the wood base material 10 is impregnated. The moisture-impermeable layer 11 can block the movement of the flame retardant due to moisture toward the protruding plate 13. Thereby, since the seepage of the flame retardant to the veneer 13 can be suppressed, the generation of white flower can be suppressed. Furthermore, since the deterioration of the adhesive layer 12 due to the seepage of the flame retardant can be suppressed, the peeling of the protruding plate 13 can be suppressed. Therefore, peeling of the protruding plate 13 can be suppressed and generation of white flower can be suppressed.

  Moreover, according to the non-combustible wood 20 of this embodiment, since the non-breathable layer 11 consists of a coating film, the non-breathable layer 11 can be formed at low cost, and the low-cost non-combustible wood 20 is realized. can do.

  Moreover, according to the incombustible wood 20 of the present embodiment, when the veneer 13 is made of a hardwood veneer, the incombustible wood 20 having a hardwood grain that is hard to be impregnated with the flame retardant is realized. Can do. Moreover, since the flame retardant is hard to penetrate into hardwood, even if the flame retardant impregnated in the wooden base material 10 permeates the moisture-impermeable layer 11, the flame retardant exudes to the veneer 13. And the generation of white flower can be suppressed.

  Moreover, according to the nonflammable wood 20 of this embodiment, since the flame retardant is a boric acid flame retardant, the wood base material 10 impregnated with the flame retardant can be formed at low cost, and low cost non-flammability. Wood 20 can be realized.

  Moreover, according to the incombustible wood 20 of this embodiment, when the wood base material 10 is a single board laminated material, the wood base material 10 can be formed at low cost, and the low-cost incombustible wood 20 can be formed. Can be realized.

  In addition, in this embodiment, although the nonflammable wood which stuck the veneer on the surface was illustrated, this invention is applicable also to the nonflammable wood etc. which stuck the decorative paper on the surface.

  As described above, the present invention is extremely useful because it can suppress peeling of the veneer and can suppress generation of white flower.

DESCRIPTION OF SYMBOLS 10 Wood base material 11 Non-breathable layer 12 Adhesive layer 13 Veneer 20 Nonflammable wood

Claims (5)

A wooden substrate impregnated with a water-soluble flame retardant;
Non-combustible wood provided with a veneer provided on one surface side of the wooden substrate via an adhesive layer,
A non-combustible wood, wherein a moisture-impermeable layer is provided between the wood substrate and the adhesive layer. In the incombustible wood according to claim 1,
The non-moisture permeable layer is made of a coating film. In the incombustible wood according to claim 1 or 2,
The non-combustible wood characterized in that the veneer is made of a hardwood veneer. In the incombustible wood as described in any one of Claims 1-3,
The flame retardant is a non-flammable wood, which is a boric acid flame retardant. In the non-combustible wood as described in any one of Claims 1-4,
The non-combustible wood, wherein the wood base material is a single-plate laminated material.

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