JPH07101029A - Manufacture of decorative veneer sheet - Google Patents

Abstract

PURPOSE:To obtain excellent wear resistance by impregnating a veneer in which a colored transparent or translucent layer is provided and which is backed with a nonwoven fabric a Japanese sheet, etc., with a thermosetting resin and further heating and pressurizing integrally thermosetting resin sheets therebetween. CONSTITUTION:Veneers 1 of a resin having no conduit hole are connected, backed with a backing material 3 such as a nonwoven fabric, a Japanese sheet, etc., to form a long base material A. On the other hand, a transparent release layer 5, a colored transparent or translucent layer 6 are sequentially provided on a support 4 of a plastic film, and a transfer layer 7 is formed to form a transfer unit B. The veneer 1 and the layer 6 are so superposed as to be opposed through a two-liquid curable type transparent or translucent adhesive layer 8, heated, pressurized, then the support 4 is peeled, the layer 7 is transferred to obtain a first laminate C. The laminate C is dipped in a thermosetting resin liquid, dried, wound in a rolled state with an impregnated layer in a semicured state, and cut to form a second laminate D. The laminate D is inserted between thermosetting resin-impregnated sheets 14, 13, 12, heated and pressurized integrally.

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 decorative veneer sheet used for surface makeup of decks such as desks, tables and counters. More specifically, the present invention relates to a method for producing a decorative veneer sheet having excellent wear resistance, which is used for a deck which is a horizontal surface such as a desk, a table and a counter.

[0002]

2. Description of the Related Art Decorative sheets such as decorative veneer sheets are widely used for surface makeup of various interior materials such as furniture and fittings.

Conventionally used decorative veneer sheet is a finger-joint method (a sliced veneer is cut into a sawtooth shape) of a veneer that is a thin slice of natural wood (0.2 m / m to 0.6 m / m). Seaming by the joining method)
It has a long shape and is lined with a non-woven fabric or Japanese paper as a reinforcing material. It is attached to the surface of the base material of the furniture, fittings, etc., and further painted to express the appearance close to natural wood products. be able to.

However, after attaching the above-mentioned decorative veneer sheet, it is necessary to perform a coating process many times in order to make the color irregularity of the seams of the finger joints or the veneers joined together inconspicuous. Therefore, there is a need for a simpler makeup means to replace the cost.

Therefore, the applicant of the present invention has previously disclosed Japanese Patent Laid-Open No. 4-27.
As described in Japanese Patent No. 9345, by laminating a printed layer such as a wood grain pattern by transfer or the like on a veneer veneer having a long seam, and applying makeup, it is possible to make the seam or color irregularity inconspicuous and various. We proposed a manufacturing method that makes it possible to reduce the number of painting processes after sticking the interior material to the surface and simplify the production process.

[0006]

However, the above-mentioned conventional decorative veneer sheet can be suitably used for surface makeup of vertical surfaces such as furniture and fittings, but the surface of the deck which is a horizontal surface such as desks and tables. As a decorative material, it is inadequate in terms of wear resistance, and has a side surface in which the range of places of use is limited. In order to compensate for such a point, it has been performed to coat the surface of the above-mentioned decorative veneer sheet with urethane resin or the like to increase the surface strength, but the quality of abrasion resistance as a decorative material for horizontal surface use. Does not fully meet.

The present invention has been made in view of such conventional problems, and as a surface decorative material for decks of desks, tables, etc., a decorative veneer excellent in abrasion resistance and inconspicuous in seams and color variations. It is an object to provide a method for manufacturing a sheet.

[0008]

In order to achieve the above object, the method for producing a decorative veneer sheet according to the present invention is a method in which veneer-less veneered veneer sheets are spliced together and further backed with a non-woven fabric, Japanese paper, or the like. A long peeled base material and a transfer member comprising a transparent release layer, and a colored transparent or colored semitransparent colored layer provided in this order on one surface of the plastic film so that the single plate and the colored layer face each other. Two-component curing type transparent or translucent adhesives are overlaid, heated and pressed, the plastic film is peeled off to form a first laminate, and then the first laminate is heated. A roll-shaped body is impregnated with a curable resin and dried to be in a semi-cured state. A sheet having a desired size is drawn from the roll-shaped body and cut into sheets to form a second laminated body, and the second laminated body is formed. Place the body on a hot plate or mirror plate and impregnated with thermosetting resin. Heating pressurized inserted between the bets are those formed by integral molding. Further, the coloring can be formed by a printed pattern layer.

The structure of the present invention will be described in more detail below.

FIG. 1 is an explanatory view of an embodiment showing the manufacturing method of the present invention. First, FIG. 1A shows the formation of the base material A by joining the single plates 1 into a long shape by the finger joint method. Reference numeral 2 in the drawing indicates a joint between the single plate and the single plate. As the backing material 3 that reinforces the veneer 1, non-woven fabric, Japanese paper, or the like is used. Then, by making the long base material A into a winding shape, it is possible to improve the productivity of the subsequent processing.

The veneer 1 of the present invention is easily available at low cost because it is abundant in tree species (generally coniferous trees such as cedar, pine and cypress) having no conduit pores, as compared to hardwood. For this reason, it is positively selected and thinly sliced (thickness 0.2 mm to 0.6 mm) for use.

Next, FIG. 1B shows the formation of the transfer body B for forming the transfer layer 7 provided on the base material A. In this case, a plastic film 4 is used as a support, and a transparent release layer 5 and a colored transparent or colored semitransparent colored layer 6 are sequentially provided on the plastic film 4 to form a transfer layer 7 to form a transfer body B. The peeling layer 5 and the coloring layer 6 can be provided by a known printing method or coating method such as gravure, silk screen, roll coating, flow coating, knife coating, etc., and the thickness considers practicality and workability (transferability). Can be set appropriately, but each is several μm
The range of to several + μm is preferable.

Here, the colored layer 6 may be solid or patterned, and when provided in a patterned form, a grain pattern is preferably employed for the purpose of the present invention. Further, the colored layer 6 is such that the texture of the veneer 1 is not impaired in appearance.
A colored transparent or colored translucent resin layer is used. By doing so, even if the color of the veneer 1 varies, the hue can be made to be approximately uniform, and the seam 2 is less noticeable, and a desirable appearance can be obtained.

Next, FIG. 3C shows the formation of the first laminate C by transferring the transfer layer 7 of the transfer body B onto the base material A, and the base material A is used as a transfer method. 1 surface of the single plate and the colored layer 6 of the transfer body B face each other with the adhesive layer 8 interposed therebetween, and then heat and pressure treatment is performed through a space between the heating roller and the pressing roller. The transfer layer 7 of the transfer body B is obtained by peeling off the plastic film 4 which is the support.
Are transferred to the substrate A.

As the adhesive layer 8, a two-component curing type transparent or translucent adhesive can be preferably used. The heating / pressurizing condition depends on the two-component curing type adhesive and the single plate used, but the surface temperature of the heating roll is 80 to 130.
C. and pressure are preferably about 8 to 12 kgf / cm in linear pressure.

Next, FIG. 3D shows the formation of the second laminate D by immersing the first laminate C in a thermosetting resin liquid. The first laminate C is impregnated with an amount of about 30 g / m
^It is dipped in a thermosetting resin liquid so that it becomes ² (dry), impregnated, dried in a hot air oven at about 100 ° C., the impregnated layer 9 is semi-cured and wound into a roll to obtain the desired size and cutting. Then, the second laminated body D is obtained. In this winding, it is preferable to use a peelable film as interleaving paper for the purpose of avoiding blocking.

Next, FIG. 3E shows the formation of the decorative veneer sheet E of the present invention by combining the second laminate D and the thermosetting resin-impregnated sheet and subjecting to heat and pressure molding. It is a thing.

First of all, the molding is performed by heating plates 10 above and below the press platen.
A backer paper 14 which is a thermosetting resin-impregnated sheet and plays a role of preventing the warp of the decorative plate, and a core paper 1 which mainly determines the thickness of the decorative plate between the metal plates 11 such as the mirror plate.
3. The second laminated body D and the overlay paper 12 for improving the abrasion resistance of the surface of the decorative plate are sequentially laminated and placed.

Here, the backer paper 14 has a basis weight of about 5
5 to 160 g / m ² paper impregnated with about 40 to 100% by weight of a melamine resin and dried, and core paper 13
As a basis weight of about 150 to 250 g / m ² about 30 to about 200
The overlay paper 12 impregnated with 100% by weight of a phenol resin and dried, has a basis weight of about 25 to
Approximately 40 to ³ for 45 g / m ² rayon pulp or non-woven fabric
A transparent resin-impregnated paper which is impregnated with 00% by weight of melamine resin and dried to be preferably used.

Then, a plurality of thermosetting resin-impregnated sheets thus stacked and mounted are heated and pressed by a hot press to be integrally molded. The heating and pressing conditions depend on the thermosetting resin used, but the heating temperature is about 130 to 150 ° C. and the pressure is about 6
Heat and pressure molding is performed at 0 to 100 kgf / cm ² for about 15 to 30 minutes. Then, pressurize with cold water for about 15-60
By cooling for a minute, the thermosetting resin-impregnated sheet is completely cured and integrated, and the decorative veneer sheet E produced by the manufacturing method of the present invention as shown in FIG. 2 can be obtained.

[0021]

In the method for producing a decorative veneer sheet of the present invention, the colored transparent or colored translucent colored layer is provided on the veneer, so that deterioration of the texture of the veneer is suppressed as much as possible and natural wood is used. The appearance remains, and variations in the color of the joints between the veneers and the veneer are less noticeable, and the decorative material has a favorable overall appearance.

Furthermore, since the thermosetting resin-impregnated sheet and the thermosetting resin-impregnated single-sheet sheet are combined and integrally molded by hot pressing, even when used on a horizontal surface such as a desk, a table or a counter, Exhibits sufficient wear resistance.

[0023]

EXAMPLES Hereinafter, the present invention will be described more specifically by showing examples. The back surface of a pine veneer sliced to a thickness of 0.2 m / m (width 900 mm) was lined with a polyester nonwoven fabric with a basis weight of 23 g / m ² via a vinyl urethane adhesive. After backing, the surface was ground and smoothed with # 180 abrasive paper. Next, the finger joint method was used to splice the veneers and make them long and wound. On the other hand,
A 25 μm thick polyester film with acrylic resin added with toluene was applied and dried with a roll coater to a thickness of 10 μm (after coating and drying) to form a transparent release layer, followed by acrylic on this. A mixture of a system resin, a tea pigment, and toluene is coated with a roll coater so that the coating thickness is 5 μm (after coating and drying), and dried to form a semitransparent brown colored layer. A transfer body was created.

Next, the elongated veneer and the transfer body are placed so that the colored layers of the veneer and the transfer body face each other, and the acrylic polyol resin dissolved in ethyl acetate and an isocyanate are mixed together through an adhesive. Overlap the line pressure between the metal roll with a surface temperature of 100 ℃ and the silicon rubber press roll at 10k.
It was passed under a pressure of gf / cm, heat-treated, and then the polyester film of the transfer member was peeled off, and the peeling layer and the coloring layer were transferred onto a single plate to prepare a roll-shaped first laminate.

Next, the first laminate is continuously dipped into a melamine resin solution in a sheet form to obtain an impregnation amount of 30 g / m.
² (dry) in a warm air oven at 100 ° C. to make the impregnated layer a semi-cured state and then re-wound, and then from this winding, a sheet as a second laminate was drawn and cut to a length of 1800 mm. .

Then, as shown in FIG. 1E, a mirror plate made of iron is placed on the lower hot platen of the hot press, and a backer paper obtained by impregnating titanium paper having a basis weight of 100 g / m ² with 80% by weight of melamine resin, Kraft paper having a basis weight of 150 g / m ² and three core papers impregnated with 60% by weight of phenol resin, the above 1800
The second laminate having a length of mm, and the overlay paper in which the basis weight of the rayon pulp is impregnated with melamine resin in an amount of 300% by weight of 25 g / m ² are laminated in this order, and an iron mirror plate is placed on the laminated paper. I scissors on the board. About 30% of this laminated body is heated at a temperature of 140 ° C. and a pressure of 80 kgf / cm ^2.
Heated and pressed for minutes. Then, pressurize it with cold water for 3
After cooling for 0 minutes, the thermosetting resin layer was cured to obtain a decorative veneer sheet according to the present invention.

When the surface abrasion resistance of the obtained decorative veneer sheet was measured by the JAS abrasion B test, data of an abrasion value of 50 and an abrasion amount of 0.09 g were obtained, which was in conformity with the acceptance criteria.

[0028]

As described above in detail, according to the method for manufacturing a decorative veneer sheet of the present invention, the entire decorative veneer sheet is firmly reinforced with the thermosetting resin, so that the surface wear resistance is improved. Is a physical property that can withstand the use of a horizontal surface such as a table or a desk, and the appearance as a decorative material has the feel of a natural wood, and the color variation and seams of the veneer are unsightly. It is possible to express an excellent design property.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example showing a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view of an example of a decorative veneer sheet obtained by the manufacturing method of the present invention.

[Explanation of symbols]

 A ... Substrate B ... Transfer body C ... First laminate D ... Second laminate E ... Decorative veneer sheet 1 of the present invention 1 ... Veneer 2 ... Seam 3 ... Backing material 4 ... Plastic film 5 ... Release layer 6 ... Coloring layer 7 ... Transfer layer 8 ... Adhesive layer 9 ... Impregnation layer 10 ... Hot plate 11 ... Metal plate such as mirror plate 12 ... Overlay paper 13 ... Core paper 14 ... Backer paper

Claims (2)

[Claims] 1. A long-sized base material formed by splicing wood veneer sheets without conduit holes and backing with a non-woven fabric, Japanese paper, etc., and a transparent release layer on one surface of a plastic film in order.
A transfer body having a colored transparent or colored translucent colored layer is laminated with a two-component curing type transparent or translucent adhesive so that the single plate and the colored layer face each other, and heat and pressure are applied. Then, the plastic film is peeled off and the first
A laminate is formed, and then the first laminate is impregnated with a thermosetting resin and dried to form a roll in a semi-cured state,
A sheet of a desired size is pulled out from the roll-shaped body, cut into sheets to form a second laminated body, and the second laminated body is placed between a hot plate or a mirror surface plate and a thermosetting resin-impregnated sheet. A method for manufacturing a decorative veneer sheet, which is formed by inserting, heating and pressing, and integrally molding. 2. The colored layer comprises a printed pattern layer.
A method for producing the decorative veneer sheet described.