JP2014083810A - Woody decorative bed plate composite base material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woody decorative bed plate composite base material not causing defect such as irregularity on the surface of a woody decorative plate.SOLUTION: A low-density fiber mat is stacked on the surface or on the front and back surfaces of a woody base plate selected from a conifer plywood, a broadleaf tree plywood, an LVL, a laminate lumber, strand board, a wafer board, a particle board, MDF, HB and woody fiber plate by thermodecomposition bonding to fill up or absorb the irregularity of the woody base plate, so that a woody composite base plate having smooth surface without surface defects can be obtained. A facing material selected from a woody base plate, a woody decorative plate, a veneer, a synthetic resin plate, a decorative thin plate, and resin impregnated printing sheet is disposed on the outside of the low-density fiber mat and bonded, so that a faultless woody decorative bed plate composite base material can be obtained.

Description

  The present invention relates to a wood-based decorative base board composite base material having no defects on the surface.

  Conventionally, as wood-based building materials, hardwood plywood, softwood plywood, LVL, laminated lumber, strand board, wafer board, particle board, wood fiber board, etc. There is a wood-type decorative board which is subjected to makeup processing on the surface of the material and the wood-based substrate, the wood-based composite base material, or the front and back surfaces. For decorative processing, decorative sheets such as veneer plates, synthetic resin plates, metal plates or resin sheets, resin-impregnated paper, titanium paper, pre-coated paper, and printing sheets using thin paper are hot-pressure cooled. Adhesion or painting is performed by pressure bonding.

  If the surfaces of the wood substrate and the wood composite base material to be subjected to makeup processing are smooth, there are no defects such as irregularities on the makeup surface. However, the wood substrate and the wood composite base material are prone to irregularities on the front and back surfaces. For example, in plywood, nodes, press marks, patches, single plate cracks, single plate overlap, core tunnels, annual rings Unevenness may occur on the front and back surfaces due to thickness unevenness between them. In particular, softwood plywood has many nodes, and uneven thickness due to sag between annual rings is remarkable. In addition, the laminated material tends to be uneven on the front and back surfaces due to the difference in thickness of the single core material. In the strand board, unevenness is likely to occur on the front and back surfaces due to its manufacturing method.

  When the front and back surfaces of the wooden substrate are uneven, the wooden composite substrate produced by bonding a wood fiber board, a particle board, or the like by hot-pressure-cold-pressure bonding is used for the wooden substrate. Unevenness cannot be covered, and it is difficult to smooth the front and back surfaces of the woody composite base material. Furthermore, even if there are no irregularities on the decorative surface immediately after processing, the gas in the recesses of the concave portion of the wooden substrate may expand or contract depending on the environmental conditions, which may cause defects on the decorative surface. When applied to flooring, etc., it may be stepped on a furniture leg such as a desk or chair, or a shoe heel, and the void cannot be covered on the surface layer, which may cause dents or cracks on the makeup surface.

JP-A-8-52703

  The object of the present invention is to provide a wood-based decorative baseboard composite base material having no defects on the surface thereof.

  The first invention of the present invention is the surface or front and back surfaces of a wood substrate selected from softwood plywood, hardwood plywood, LVL, laminated timber, strand board, wafer board, particle board, MDF, HB, and wood fiber board. A low-density fiber mat is laminated by thermocompression bonding, and the depression of the wooden substrate is filled with the low-density fiber mat, and the convexity is absorbed, so that the surface is a smooth wooden composite substrate having no surface defects. Features.

  The second invention of the present invention is the surface or front and back surfaces of a wooden substrate selected from softwood plywood, hardwood plywood, LVL, laminated timber, strand board, wafer board, particle board, MDF, HB, and wood fiber board. A low-density fiber mat is arranged, and a skin material selected from the above-mentioned wood-based board, wood-based decorative board, protruding board, synthetic resin board, decorative thin board, and resin-impregnated paper printing sheet is arranged on the outside, and by simultaneous thermocompression bonding It is characterized in that it is a wood-based decorative base board composite base material that is laminated, fills in the recesses of the wood-based substrate, and absorbs the protrusions so that there is no surface defect.

  As described above, according to the present invention, a low-density fiber mat is thermocompression bonded to the front surface or front and back surfaces of the wooden substrate, whereby the surface or front and back surfaces of the wooden substrate are smooth and have no defects. It can be used as a composite substrate, and a wide range of wood-based decorative baseboard composite base materials that have undergone a decorative process can be provided. In addition, by expanding and effectively utilizing the value range of forest resources, the reduction of forest resources can be prevented and global warming countermeasures and domestic forest business can be activated.

Perspective view of coniferous plywood laminated with coniferous veneers Perspective view of fiber mat Perspective view of wood-based composite substrate Cross section of wood composite board Perspective view of wood-based decorative baseboard composite base material

  The present invention will be specifically described with reference to the following examples.

  FIG. 1 is a perspective view of a softwood veneer 111 and a softwood plywood 11. On the surface of the conifer plywood 11, there are also portions that become uneven defects 119 such as nodes.

  The low-density fiber mat 12 shown in FIG. 2 uses long fibers collected from hemp plants or the like, or long fibers collected from palm plants such as oil palm and coconut palm. Further, the low-density fiber mat 12 mixed with a powder thermosetting resin is used, but instead of the powder thermosetting resin, the thermoplastic resin fiber is mixed with vegetable fiber, chemical fiber, and wood fiber. Things are also done. Alternatively, the low-density fiber mat 12 may be impregnated with a liquid thermosetting resin. The low-density fiber mat 12 may be the following substitute mat.

  The alternative mat 1 is an alternative fiber mat mainly composed of wood fibers and mixed with a powder thermosetting resin. In the case of a short wood fiber, it is difficult to form a mat by needle punching or the like. Therefore, in order to form a mat shape, the thermoplastic resin fibers may be mixed and then appropriately heated to form.

  The alternative mat No. 2 is an alternative fiber mat in which a powder thermosetting resin is mixed using a synthetic fiber such as nylon, and thermoplastic resin fibers may be mixed with the alternative fiber mat.

  The substitute mat No. 3 is a substitute fiber mat formed by mixing a powdered phenol resin or the like that functions as a binder with fibers obtained by finely disposing of discarded clothes and the like, and then forming a felt shape. This substitute fiber mat is called a so-called resin felt or thermosetting felt. It is also possible to mix thermoplastic resin fibers with this substitute fiber mat.

  Substitute mat No. 4 is a resin felt in which thermoplastic resin fibers such as nylon, polyester, polyethylene, and polypropylene are formed into a felt shape by needle processing from discarded clothing and mixed with thermosetting resin or thermoplastic resin. But it ’s okay. In the case of a substitute fiber mat made of thermoplastic resin fibers, it is preferable to set the hot plate temperature for hot-pressure bonding to 150 to 180 degrees. The thermoplastic resin constituting the thermoplastic felt may be one kind of thermoplastic resin, or may be a combination of two or more kinds. If the temperature is set to the melting point of the resin having a low melting point in the matting process, only the thermoplastic resin having a low melting point is melted, and the mat can be formed by the adhesive effect due to adhesion. It is also possible to mix a powder curable resin or a thermosetting resin fiber into a thermoplastic felt or impregnate a liquid thermosetting resin.

  As the powder thermosetting resin, phenol resin powder is used. Instead of this, a powder thermosetting resin such as a urea resin, a melamine resin, a urea-melamine cocondensation resin, an epoxy resin, or a urethane resin may be employed. The ratio of the powder thermosetting resin to the total weight of the low-density fiber mat 12 mixed with the powder thermosetting resin is preferably about 5 wt% to 15 wt%.

  The thickness before compression of the low-density fiber mat 12 in FIG. 2 is preferably 5 to 50 mm, and the density (bulk density) is preferably 0.03 to 0.15 g / cubic cm. When the thickness before compression of the low-density fiber mat 12 is thinner than the above range, when the low-density fiber mat 12 is heat-pressure bonded, the surface unevenness of the softwood plywood 11 cannot be sufficiently absorbed, If the thickness of the low-density fiber mat 12 before compression is larger than the above range, it is necessary to extend the hot press time, resulting in an increase in cost.

  FIG. 3 shows that the concave and convex defects 119 such as nodes of the softwood plywood 11 are filled with the low density fiber mat 12 by hot-pressure bonding a low density fiber mat 12 to the surface of the softwood plywood 11. By absorbing the convex portions, the wood-based composite substrate 15 having a smooth surface and no defects can be formed.

  In FIG. 3, the wood-based composite substrate 15 is made without applying an adhesive to the interface between the low-density fiber mat 12 and the softwood plywood 11. An adhesive may be used at this interface.

  FIG. 4 is a cross-sectional view of the wood-based composite substrate 15 having no defects on the front and back surfaces, in which the uneven defects 119 on the front and back surfaces of the softwood plywood 11 are corrected by the low-density fiber mat 12. In the case of the wood-based composite substrate 15 of the present example in which the uneven defect 119 is filled and absorbed by the low-density fiber mat 12, the wood-based substrate, the wood-based decorative board, the veneer, the synthetic resin board, and the decorative thin board When the resin-impregnated paper printing sheet is pressure-bonded or painted, the irregular defect 119 does not appear on the decorative surface.

  The pressing conditions for producing the wood composite substrate 15 are as follows: the thermosetting resin mat temperature during thermocompression processing is 180 to 200 degrees, the thermoplastic resin mat temperature is 150 to 180 degrees, and the pressure is 5 to 10 kg. / Square cm, and the time is preferably about 3 to 10 minutes.

  FIG. 5 is an example of a wood-based decorative baseboard composite base material 10 using a 5-ply softwood plywood 11 as a base material. The number of plies of the conifer plywood 11 is not limited to 5 plies. Further, a wood-based board selected from hardwood plywood, laminated board, strand board, wafer board, LVL, MDF, HB, particle board, and wood fiber board may be used as the base material.

  FIG. 5 shows a wood-based decorative baseboard composite base material 10 in which a low-density fiber mat 12 is arranged on the surface of the softwood plywood 11 and a skin material 131 is overlapped on the outer surface of the soft mat plywood 11. Similar to FIGS. 2 and 3, the low-density fiber mat 12 is bonded to the surface of the softwood plywood 11 by hot-pressure bonding, thereby eliminating the unevenness defect 119 and further superimposing the skin material 131, thereby providing a highly rigid surface defect. The wood-based decorative base board composite base material 10 having a smooth surface without any surface can be obtained.

  The wood-based decorative base board composite base material 10 in FIG. 5 may be a product.

  These specific examples merely disclose an example of the technology included in the claims. The claims should not be construed as limited by the configuration, numerical values, or the like of the specific examples. The scope of the claims includes techniques obtained by variously modifying or changing the specific examples using known techniques, knowledge of parties, and the like.

  When the wood substrate is used for the decorative base board as an industrial applicability, a wood decorative board without defects cannot be made unless the front and back surfaces are smooth. In particular, the veneer plywood is mainly composed of Nanyang trees, but the Nanyang trees are also limited by cutting due to global warming measures and have few conventional high quality veneers. Softwood plywood has many defects such as irregularities on the front and back surfaces. It is difficult to use for a dressing board. The use of coniferous plywood and flawed southern seawood plywood as a dressing baseboard will enable effective use of wood resources. become.

DESCRIPTION OF SYMBOLS 10 Wood type decorative base board composite base material 11 Softwood plywood 111 Softwood veneer 119 Unevenness | defect defect 12 Low density fiber mat 131 Skin material 15 Wood type composite substrate

Claims (2)

  Low-density fiber mats are thermocompression-bonded to the front or back surface of a wooden substrate selected from softwood plywood, hardwood plywood, LVL, laminated wood, strand board, wafer board, particle board, MDF, HB, and wood fiber board. A wood-based composite substrate, characterized in that the low-density fiber mat fills the recesses of the wood-based substrate and absorbs the protrusions, thereby smoothing the surface with no defects on the surface.   Low density fiber mats are placed on the surface or front and back surfaces of wood substrates selected from softwood plywood, hardwood plywood, LVL, laminated wood, strand board, wafer board, particle board, MDF, HB, and wood fiber board. The outer surface of the wood-based board, the wood-based decorative board, the veneer, the synthetic resin board, the decorative thin board, and the resin-impregnated paper-printed sheet are arranged and laminated by simultaneous thermocompression bonding. It is a wood-based decorative baseboard composite base material characterized in that the surface without defects is smooth by filling the dents and absorbing the projections.