JPH1067075A - Medium quality fiber melamine decorative board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a decorative board which retains adequate strength and stable plate-like form after thermal molding hardening under pressure and especially superior water resistance and high performance such as anticontamination properties or surface hardness by making a laminate of a medium quality fiber board, a decorative impregnated paper and a core impregnated paper. SOLUTION: This medium quality fiber melamine decorative board 1 consists of a decorative impregnated paper 2 obtained by impregnating a decorative paper with a melamine resin liquid, a core impregnated paper 3 obtained by impregnating an unbleached kraft paper with a phenol resin liquid, and a raw material for a medium quality fiber board 4. The preferable medium duty fiber melamine decorative board 1 is such that the upper and lower surfaces of the medium quality fiber board 4 are sandwiched between two pieces of the core impregnated paper 3. Considering the form stability of the decorative board 1 obtained after thermal molding under pressure, the impregnated paper should preferably be constructed of the equal number of the upper and lower part pieces of the decorative impregnated paper 2 and the core impregnated paper 3 with the medium quality fiber board 4 located in the center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior material and a wall material, and more particularly to a decorative plate which does not require a plywood laminating process and which is suitable for use as a toilet partition or a wall material.

[0002]

2. Description of the Related Art In a decorative board conventionally used as an interior material or a wall covering material, a decorative board in which a base material is backed with plywood is directly bonded to a bone tree which has become a lattice for processing a partition board. Polyester decorative plywood has been commonly used. However, in the case of polyester decorative plywood, water resistance and stain resistance, performance such as surface hardness is poor,
Especially in places where water is used when cleaning toilet booths, etc.
Stain-like stains and corrosion damage are liable to occur, often causing problems in use.

On the other hand, a conventional melamine decorative board is superior to polyester decorative plywood in terms of water resistance, stain resistance and surface hardness as a single substance, but is used as a partition board or the like which requires flash processing. In this case, if you glue it to a bone tree that has become a grid for partition plate processing,
Poor adhesion occurs and flapping occurs. Therefore, a discarded plywood is required, and after laminating the discarded plywood to the bone and wood, it is necessary to perform a procedure of further laminating the melamine decorative board from above, which increases processing labor and cost, and also laminates. The plywood has poor water resistance similarly to the case of the polyester decorative plywood, and the melamine decorative ply laminated with the discarded plywood has been a problem in the use of a partition board, a wall material and the like.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention has excellent performances such as water resistance, stain resistance and surface hardness, which are not present in conventional polyester decorative plywood. To provide a decorative board with excellent performance, especially with excellent water resistance, using a structure and construction means different from the conventional melamine decorative board that is applied and bonded, and requires less processing time and can be installed relatively inexpensively. With the goal.

[0005]

In order to solve the above-mentioned problems, the decorative board of the present invention focuses on a fiberboard processed from hardwood or coniferous wood as one of the laminated constituents. Medium fiberboard was selected and adopted.

The main structure of the decorative board according to the present invention for solving the above-mentioned problem is that a medium fiber board is sandwiched from above and below with several core-impregnated papers obtained by impregnating kraft paper with a phenol resin. Further, a decorative paper impregnated with a melamine resin impregnated in a decorative paper is laminated and laminated thereon, and a means for producing a decorative melamine board of a medium fiber by pressurizing and heat-forming this is adopted.

[0007] The fiberboard of the medium fiberboard used herein is obtained by hot-pressing wood fibers, and has fine and uniform characteristics because fine wood fibers are hardened. Both have excellent workability. Fiberboards are classified into hard fiberboards, medium fiberboards and soft fiberboards. Hard fiberboards are not suitable because of high density and poor resin penetration during press molding. Further, in the case of a soft fiber board, although resin penetration is good, it cannot withstand the pressure at the time of press molding and may be damaged, which is not suitable. In the case of a medium fiberboard, the permeability of the resin is good and no breakage occurs, so it has been confirmed that it is an optimal component.

[0008] Using a core impregnated paper obtained by impregnating kraft paper with a phenol resin and a decorative impregnated paper obtained by impregnating a decorative paper with a melamine resin, using a medium fiber board through which the phenol resin sufficiently penetrates, The medium-sized fiber melamine decorative board obtained by laminating these and pressing and heating has a stable plate-like morphology, and has excellent functions such as water resistance, stain resistance, and surface hardness. .

[0009] Further, since the above-mentioned melamine decorative board of the medium fiber has a stable plate-like form, there is no failure caused by bonding with the bone and wood during the flash processing method, and after the bonding, No flapping occurs. For this reason, a plywood for disposal which was required in the conventional construction method with a melamine decorative board is not required, and the plywood can be directly adhered to the bone and wood, so that there is a feature that processing time and cost can be greatly reduced.

[0010] As one of means for obtaining the above-mentioned melamine decorative board of the medium fiber, there may be used a method in which overlay paper impregnated with a melamine resin is further superimposed on decorative impregnated paper, followed by pressure and heat molding. It is better to use unbleached kraft paper for the core impregnated paper.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The decorative melamine fiber board 1 according to the present invention, which is shown in FIG. 1, includes a decorative paper obtained by impregnating decorative paper with a melamine resin solution. It is composed of impregnated paper 2, a core impregnated paper 3 obtained by impregnating unbleached kraft paper with a phenol resin liquid, and a medium fiberboard 4 material composition.

As a preferred configuration of the medium fiber melamine decorative board 1, it is preferable to laminate the medium fiber board 4 such that both upper and lower surfaces of the medium fiber board 4 are sandwiched by the core impregnated paper 3. Any number of core impregnated papers 3 can be used depending on the application. However, it is appropriate that the total number of core impregnated papers 3 is about 5 in total in view of the material cost and the labor of the work process. Further, in consideration of the further stability of the shape of the decorative board obtained after the pressure and heat molding, the number of impregnated papers composed of the decorative impregnated paper 2 and the core impregnated paper 3 is equal in the vertical direction around the medium fiber board 4. Is preferably used.

FIG. 1 shows a decorative board 1 of a medium fiber melamine according to claim 2, wherein a decorative paper 2 obtained by impregnating decorative paper with a melamine resin liquid and a phenol resin liquid impregnated on unbleached kraft paper. The core impregnated paper 3 obtained by the above and the material composition of the medium fiber board 4 are sandwiched from above and below by one core impregnated paper 3 from the upper side and two sheets from the lower side of the medium fiber board 4. After the decorative impregnated paper 2 is overlaid on the core impregnated paper 3 on the upper surface side, a stainless steel mirror plate is applied from the upper surface side of the decorative impregnated paper 2 to be the decorative plate surface, and press-pressed and heat-formed. It was obtained.

[0014]

EXAMPLE The melamine decorative board 1 of medium fiber shown in FIG. 1 was mixed at a molar ratio of formaldehyde to 1.8 with respect to a molar ratio of melamine of 1 and a pH of 9.0 at 93.degree.
A melamine resin solution having a concentration of 60% obtained by heating and reacting under the conditions of 1 minute is impregnated into decorative paper (140 g / m ² ) and dried to obtain decorative impregnated paper 2 having a resin adhesion amount of 50% by weight. Was. Next, unbleached kraft paper (190 g / m ² ) was impregnated with a phenol resin solution having a concentration of 55% and dried to obtain a core-impregnated paper 3 having a resin adhesion amount of 40% by weight.

The core impregnated paper 3 is overlaid on two sheets and a thickness of 2.5
mm medium-fiber board 4, a single core-impregnated paper 3, a decorative impregnated paper 2, and a stainless steel mirror plate from the upper surface of the decorative impregnated paper 2. Pressure 70 kg / cm ² , heating temperature 150 ° C, heating time 60
And a heating time of 30 minutes to obtain a decorative plate 1 having a thickness of 2.1 mm.

Comparative Example 1 A decorative paper (140 kg / m ² ) was applied on a plywood having a thickness of 2.5 mm, and a polyester resin was cast thereon in an amount of 150 g / m ² , followed by drying.
A polyester decorative plywood having a thickness of 2.6 mm was obtained.

Comparative Example 2 Five core-impregnated papers obtained by impregnating unbleached kraft paper with a phenol resin liquid were laminated, and decorative impregnation was obtained by impregnating decorative paper with a melamine resin liquid. One sheet of paper is stacked, a stainless steel mirror plate is applied from the upper surface of the decorative impregnated paper under the same conditions as in the example, press pressure 70 kg / cm ² , heating temperature 150 ° C., heating time 60
And a cooling time of 30 minutes to form a decorative plate having a thickness of 1.2 mm. Further, in accordance with actual construction conditions, the back surface of the decorative board is sanded with a belt sander having a roughness of # 100, and bonded to a 2.5 mm-thick plywood with a rubber-based adhesive to obtain a thickness of 3. A melamine decorative board of 8 mm attached to plywood was obtained.

[Test Method] The test pieces used in the test were the medium-melt melamine decorative board of 2.1 mm thickness obtained in the example and the 2.6-mm thick polyester decorative plywood obtained in Comparative Example 1. And the melamine decorative board of 3.8 mm in thickness attached to plywood obtained in Comparative Example 2 was used. The stain resistance test and the dye resistance test were performed according to JIS K6902. In the water absorption test, two test pieces were placed in water at room temperature (25 ° C).
A method of comparison after soaking for 4 hours was adopted. The value as the water absorption was calculated from the ratio of the weight of the test piece before the test to the weight increase of the test piece after the test, and used.

[0019]

[Table 1]

As shown in Table 1, the embodiment has a thickness of 2.
It has the thinnest structure of 1 mm. In the stain resistance test, there was a significant difference in the reaction between 1% iodine alcohol solution in d), office ink (blue black) in n), and 2% mercurochrome aqueous solution in o). In the wear resistance test,
It was confirmed that Comparative Example 1 was inferior in abrasion properties to Example and Comparative Example 2. From both stain resistance and wear resistance tests,
In terms of the surface performance of the decorative board, it is judged that the decorative board using the melamine resin is superior to the one using the polyester resin. In the water absorption test, the example showed 7.5%, and it was confirmed that the example was the most excellent in water resistance.

[0021]

As described above, the medium fiber melamine decorative board of the present invention uses a medium fiber board and has a laminated structure of a decorative impregnated paper and a core impregnated paper. A decorative plate having strength and a stable plate-like shape, particularly excellent in water resistance, and excellent in performance such as stain resistance and surface hardness can be obtained. In addition, since a discarded plywood which has been conventionally required at the time of the flash processing method such as partitioning is not required, and it can be adhered to a bone tree as it is, the effect of greatly reducing processing labor and cost can be obtained.

Further, as the laminated structure of the present invention, two core-impregnated papers are superimposed, a medium fiber board is superimposed, one core impregnated paper is superimposed on the medium fiber board, and one decorative impregnated paper is further superimposed. By adopting, it has a sufficient strength and a stable plate-like shape despite its thin structure of 2.1 mm, and is excellent in performance such as water resistance, stain resistance and surface hardness, partition and wall material As an application, it is possible to obtain a melamine decorative board of the highest quality medium fiber which realizes a great reduction in processing labor and cost.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view showing a configuration of the present invention.

[Explanation of symbols]

 1. Decorative board 2. 2. Cosmetic impregnated paper Core impregnated paper4. Medium fiberboard

[Table 1]

[Table 1]

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B32B 31/20 9349-4F B32B 31/20 E04B 2/72 E04B 2/72 Z E04F 13/16 0231-2E E04F 13/16 A

Claims (3)

[Claims] 1. A laminate of a decorative impregnated paper obtained by impregnating a decorative paper with a melamine resin liquid, a core impregnated paper obtained by impregnating a kraft paper with a phenol resin liquid, and a medium fiberboard. Melamine decorative board obtained by molding under pressure and heat. 2. The medium fiber decorative melamine board according to claim 1, wherein the medium impregnated paper is superimposed on two core impregnated papers, a medium impregnated paper is superimposed on the medium fiber impregnated paper, and the decorative impregnated paper is further laminated on the medium impregnated paper. 2. The melamine decorative board according to claim 1, wherein the decorative board has a laminated structure. 3. The structure according to claim 1, wherein an overlay paper is superposed on the decorative impregnated paper.
The melamine decorative board of the above-mentioned medium fiber.