JP2588081B2 - Continuous veneer manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a continuous decorative board with less warpage and curl.

[0002]

2. Description of the Prior Art In recent years, diallyl phthalate resin decorative boards used for furniture and construction members have been produced by coating diallyl phthalate resin or a diallyl phthalate resin and an unsaturated polyester resin on decorative paper or colored titanium paper. The resin impregnated decorative paper impregnated with the liquid and the resin impregnated core paper coated or impregnated with any resin of unsaturated polyester resin, melamine resin, or rubber latex on kraft paper are stacked, and hot-pressed using a continuous press. Molding is becoming mainstream.

[0003]

[Problems to be solved by the invention]

(B) However, the diallyl phthalate resin decorative board formed by hot-pressing with a continuous press machine has a strong curl,
Also, when cut to a fixed size immediately after hot pressing,
(B) Further, the decorative plate with adhesive, the back surface of which is diallyl phthalate resin decorative plate, is adhered to the wood edge of plywood, particle board, etc. When combined, floating and peeling due to the warp of the decorative board are likely to occur. (C) The resin used for the diallyl phthalate resin decorative board is a diallyl phthalate resin or an unsaturated polyester resin having a large molecular weight, Alternatively, since these are mixtures, there is a disadvantage that the resin liquid hardly penetrates the decorative paper, and a part of the printing ink is easily peeled off in a taping test on the surface of the decorative plate.

[0004]

SUMMARY OF THE INVENTION The present invention has been studied in view of these circumstances, the decorative paper, diallyl phthalate
Of a resin solution consisting of a polyester resin and an unsaturated polyester resin
Alkyl etherified melamine resin 2 to 2
This is a method for producing a continuous decorative board, characterized in that a resin-impregnated decorative paper impregnated with a mixed resin liquid to which 0% is added and a non-woven fabric made of polyester fiber as a core material are laminated, and this is hot-pressed.

[0005] The resin mixture of essential components used in the present invention is a mixture of diallyl phthalate resin, unsaturated polyester resin and alkyl etherified melamine resin, and the ratio of diallyl phthalate resin to unsaturated polyester resin is 8%. : 2: 2: 8 is desirable. If the diallyl phthalate resin is less than 2: 8, the resin-impregnated decorative paper tends to cause blocking. Further, the physical properties of the decorative board are inferior in surface hardness and solvent resistance. If the amount of diallyl phthalate resin is larger than 8: 2, warpage is likely to occur and it is difficult to handle. If necessary, the mixed resin solution may include a releasing agent, monomers such as diallyl phthalate monomer as a cross-linking agent, fine silica powder as a thixotropic agent, acetone and toluene as organic solvents, and organic peroxide as a curing agent. Things are added as appropriate.

[0006] The alkyl etherified melamine resin is preferably added in an amount of 2 to 20% based on the solid content of the resin solution comprising diallyl phthalate resin and unsaturated polyester resin. If it is less than 2%, a part of the printing ink is easily peeled off, and if it is more than 20%, the appearance of the continuous decorative board is disadvantageous.

Further, the peeling of the printing ink is further prevented,
To further improve the appearance of the continuous decorative panel, impregnate the decorative paper with an alkyl etherified melamine resin,
In addition, diallyl phthalate resin and unsaturated polyester resin
It is also possible to impregnate a resin solution consisting of:

The basis weight of the decorative paper is not particularly limited.
g / m ² ~120g / m of ² things can be used, if necessary, titanium, pigments, or colored, such as a dye, grain pattern, pebble patterns, and abstract patterns are printed. Resin ratio is 40-300
%, Preferably 60 to 150%.

The nonwoven fabric used as the core material is preferably a spunbonded nonwoven fabric which is a nonwoven fabric made of polyester fibers. A hot-press molded product of a non-woven fabric of other fibers, for example, a non-woven fabric made of polypropylene, nylon, rayon, vinylon, and the like, and a resin-impregnated decorative paper are liable to be warped or rolled, thereby solving the problems of the present invention. I can't. The basis ^{weight, 30g / m 2 ~150g / m} 2 non-woven fabric is preferable. Further, the nonwoven fabric can be impregnated with a resin such as acrylic, polyurethane, polyester, or rubber latex in order to increase the inter-sheet strength.

[0010] The nonwoven fabric made of resin-impregnated decorative paper and polyester fiber is hot-pressed by a continuous press. At this time, the embossed continuous decorative board can be obtained by inserting the embossed film sheet into the resin-impregnated decorative paper side or using an embossed belt by etching, engraving, or the like. Temperature is 100 ° C to 180 ° C, preferably 130 ° C to 160 ° C, pressure is 1 to 50kg / c
It is hot pressed at m ² , preferably ² to 30 kg / cm ² .

[0011]

The continuous decorative board of the present invention has surface properties as a normal diallyl phthalate decorative board, and has extremely small warpage and curl, and has excellent handleability even in a taping test. It becomes a decorative board. Further, since the decorative board itself has a small warp, the decorative board with the pressure-sensitive adhesive is less likely to float even when bonded to a plywood or a particle board.

Hereinafter, the present invention will be described with reference to Examples and Comparative Examples.

[0013]

【Example】

Example 1 A decorative paper on which a wood pattern having a basis weight of 80 g / m ² was printed was impregnated with the mixed resin solution shown in Table 1 so that the resin ratio became 100%. did. Basis weight with spunbonded nonwoven fabric (2) composed of polyester fibers of 100 g / m ² as a core material, Enbosushi embossed is affixed wood grain - with bets, temperature 135 ° C., the pressure is set to 10 kg / cm ² It was hot-pressed by a continuous press machine to obtain a continuous decorative board of Example 1. The obtained continuous decorative board was slightly warped and slightly curled, and the printing ink was not peeled off even in a taping test. In addition, we give adhesion processing,
After bonding to the tip of the particle board, a floating test was carried out, but no floating occurred.

Table 1 shows the composition of the mixed resin liquid. Solid contents are shown for unsaturated polyester resins and methyletherified melamine resins.

[0015]

[Table 1]

Example 2 A decorative paper coated with a wood pattern having a basis weight of 80 g / m ² was impregnated with the mixed resin solution shown in Table 2 so that the resin ratio became 100%. 1). Basis weight with spunbonded nonwoven fabric (2) composed of polyester fibers of 100 g / m ² as a core material, Enbosushi embossed is affixed wood grain - with bets, temperature 135 ° C., the pressure is set to 10 kg / cm ² It was hot-pressed by a continuous press machine to obtain a continuous decorative board of Example 1. The obtained continuous decorative board was extremely slight in both warpage and curl, and the printing ink did not peel off even in the taping test. Further, after applying an adhesive treatment and pasting the particle board to the open end of the particle board, a floating test was carried out, but no floating occurred.

Table 2 shows the composition of the mixed resin liquid. Solid contents are shown for unsaturated polyester resins and methyletherified melamine resins.

[0018]

[Table 2]

Comparative Example 1 Resin-impregnated core paper obtained by impregnating kraft paper having a basis weight of 160 g / m ^{2 with} a rubber latex resin so that the resin ratio becomes 30%.
The resin-impregnated decorative paper (1) and the embossed sheet used in Example 1 were hot-press molded under the same conditions as in Example 1 to obtain a continuous decorative sheet of Comparative Example 1. In the obtained continuous decorative board, although the printing ink did not peel off in the taping test, both the warpage and the curl were remarkable. In addition, after applying an adhesive treatment and pasting it to the edge of the particle board, a floating test was carried out. When the linear pressure was 0.2 kg / cm, floating occurred.

Comparative Example 2 The resin paper obtained by removing the methyl etherified melamine resin and P-toluenesulfonic acid from the mixed resin liquid used in Example 1 was added to the decorative paper used in Example 1 with a resin ratio of 100%. To obtain a resin-impregnated decorative paper. Using a spunbond nonwoven fabric (2) made of polyester fiber having a basis weight of 100 g / m ² as the core material, and hot-press molding under the same conditions as in Example 1,
The continuous decorative board of Comparative Example 2 was obtained. The obtained continuous decorative board is
The warp and curl were slight, and after applying an adhesive treatment and pasting it to the tip of the particle board, a floating test was carried out, but no floating occurred. However, in the taping test, a part of the printing ink was peeled off.

Comparative Example 3 The resin paper obtained by removing the methyl etherified melamine resin and P-toluenesulfonic acid from the mixed resin liquid used in Example 1 was added to the decorative paper used in Example 1 with a resin ratio of 100%. To obtain a resin-impregnated decorative paper. As a core material, a resin-impregnated core paper obtained by impregnating kraft paper having a basis weight of 160 g / m ^{2 with} a rubber latex resin so that the resin ratio becomes 30% is used.
It was hot-pressed under the same conditions as in Example 1 to obtain a continuous decorative board of Comparative Example 3. The obtained continuous decorative board was remarkably warped and rolled, and a part of the printing ink was peeled off in the taping test. In addition, we give adhesion processing, and
After pasting it on the edge of the wood, a floating test was performed.
Floating occurred when the linear pressure was 0.2 kg / cm.

The evaluation method is as follows.

As for the warpage, the decorative plate formed by hot pressing was cut into a length of 1500 mm, placed on a horizontal surface in a room such that the surface of the decorative plate faced up, and the state of the warp was visually checked.

The wound gauze has a diameter of 3 so that the surface of the decorative sheet is outside without cutting the hot-pressed decorative sheet.
After wrapped around an inch paper roll and left in a room for one month, the rolled decorative board was unwound and placed so that the surface of the decorative board faced up, and the degree of curl was visually checked.

Regarding the float, a decorative board which has been subjected to an adhesive treatment is attached to the tip of a particle board having a thickness of 18 mm so that the linear pressure becomes 5 kg / cm and 0.2 kg / cm. The specimen was left for 3 days under the condition of 50 ° C.-90%, and the degree of floating was visually checked.
Floating was evaluated as x.

In the taping test, 100 squares per square cm ² were formed on the surface of the decorative plate with a cutter knife, a cellophane tape was stuck thereon, and the ink was not pulled off by pulling by hand. The number was visually checked, and 100/100 was determined without peeling.

As described above, the decorative board had little warpage and curl, was free from floating, and was good in the taping test.

The evaluation results are shown in Tables 3 and 4.

[0029]

[Table 3]

[0030]

[Table 4]

[0031]

[Brief description of the drawings]

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

[Explanation of symbols]

 1 Resin impregnated decorative paper 2 Non-woven fabric

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B32B 27/36 103 B32B 27/36 103 27/42 27/42 31/12 7148-4F 31/12 31/20 7148-4F 31/20 // B29K 61:20 67:00 105: 06 105: 08 B29L 9:00 (56) References JP-A-60-44337 (JP, A) JP-A-63-57232 (JP, A) JP-B 52-514 (JP, B2) JP-B 60-5187 (JP, B2) Mitsuo Abe, "Plastic Materials Course 3 Melamine Resin", Nikkan Kogyo Shimbun, May 15, 1961 59 pages

Claims (2)

(57) [Claims] 1. A decorative paper comprising a diallyl phthalate resin and
For the solid content of the resin liquid composed of unsaturated polyester resin
And add 2-20% of alkyl etherified melamine resin
A method for producing a continuous decorative board, comprising laminating a resin-impregnated decorative paper impregnated with the mixed resin liquid and a nonwoven fabric made of polyester fiber as a core material, and subjecting the nonwoven cloth to hot-press molding. 2. Alkyl etherified melamine for decorative paper
After impregnating the resin, further with diallyl phthalate resin
The method for producing a continuous decorative board according to claim 1, wherein a resin liquid comprising an unsaturated polyester resin is impregnated .