JP2000127113A - Method for coating surface of sliced-veneer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for coating the surface of a sliced-veneer sheet of which the surface can be coated in a beautiful finish. SOLUTION: A fibrous sheet 2 is adhered to the surface of a mold release plate 1, and a sliced veneer 3 is adhered to the surface of the sheet 2. After the coloring treatment in which the surface of the sliced veneer 3 is coated, a sliced-veneer sheet 4 formed by the adhesion/integration of the sliced veneer 3 to/with the sheet 2 is peeled off from the mold release plate 1. Since the sheet 4 is adhered provisionally to the surface of the plate 1, the sheet 4, even when it is soft and flexible, is prevented from being bent owing to the rigidity of the plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a surface of a flexible veneer sheet used for surface decoration of building materials such as doors and doors of houses.

[0002]

2. Description of the Related Art Conventionally, a method of applying a veneer to the surface has been widely known as a method of applying makeup to building materials and the like. When sticking a veneer to the surface of a building material in this way, the veneer is a thin slice of wood, so when attaching the veneer while bending the veneer along the curved surface of the building material, cracks may occur in the veneer There is. Therefore, in this case, a veneer sheet is used in which a veneer is attached to the surface of a fibrous sheet such as a nonwoven fabric and the veneer is reinforced with a fibrous sheet.

[0003] This veneer sheet is made thin and flexible so that it can be easily bent along the curved surface of the building material. The surface of the veneer sheet of this veneer sheet is colored by applying a paint.

[0004]

When the surface of the veneer sheet of the veneer sheet is coated, the paint is applied and then wiping is performed to apply the paint to the surface of the veneer in order to make a conduit such as oak material stand out. And wipe it off
Although the process of injecting paint into the conduit is indispensable, the veneer sheet is thin and flexible as described above, so the veneer sheet is bent and does not receive sufficient tension, and the paint is applied to the conduit. Inadequate wiping was difficult, and it was difficult to finish coloring by painting beautifully.

The present invention has been made in view of the above points, and has as its object to provide a surface coating method for a veneer sheet that facilitates coating with a beautiful finish.

[0006]

The surface coating method for a veneer sheet according to the present invention comprises the steps of:
The veneer 3 is adhered to the surface of the fibrous sheet 2 and the surface of the veneer 3 is painted and colored, and then the fibrous sheet 2 and the veneer 3 are bonded and formed integrally. The sheet 4 is separated from the release plate 1.

According to a second aspect of the present invention, the release plate 1 is formed by attaching a film 6 of a resin selected from polyethylene terephthalate, polypropylene, polyethylene, nylon, and a blend of two or more of these to the surface of the substrate 5. It is characterized in that it is.

Further, the invention of claim 3 is characterized in that the adhesive for bonding the fibrous sheet 2 to the surface of the release plate 1 is an acrylic adhesive.

The adhesive for bonding the veneer 3 to the surface of the fibrous sheet 2 is preferably a modified vinyl adhesive or a latex adhesive.

[0010]

Embodiments of the present invention will be described below.

The veneer plate 3 is obtained as a thin wooden piece by thinly slicing the raw wood by rotary slicing or the like, and preferably has a thickness of about 0.2 to 0.4 mm. Further, as the fibrous sheet 2, a nonwoven fabric or the like can be used, and the thickness thereof is 0.05 to
It is preferably about 0.2 mm.

The release plate 1 is formed by providing a release layer on the surface of a rigid substrate 5 such as plywood, MDF, or particle board. This release layer is made of polyethylene terephthalate, polypropylene, polyethylene, or the like. ,
A resin film 6 selected from nylon (polyamide) or a blend of two or more of these materials
It can be formed by sticking on the surface of a. The film 6 can be attached to the release plate 1 by any method such as adhesion with an adhesive or welding by heating and pressing, but it is necessary to attach the film 6 firmly so as not to be easily peeled off.

Then, first, the fibrous sheet 2 is bonded to the surface of the release plate 1 on which the film 6 is stuck. As the adhesive for bonding the fibrous sheet 2 to the release plate 1, it is preferable to use an acrylic adhesive. After the adhesive is applied to the surface of the release plate 1, the fibrous sheet 2 is superimposed on the adhesive, and the resultant is hot-pressed, whereby the fibrous sheet 2 can be bonded to the surface of the release plate 1. Next, the veneer plate 3 is bonded to the surface of the fibrous sheet 2 bonded to the release plate 1. As an adhesive for bonding the veneer 3 to the fibrous sheet 2, it is preferable to use a modified vinyl adhesive or a latex adhesive. After the adhesive is applied to the surface of the fibrous sheet 2, the veneer 3 is overlaid thereon, and is thermally pressed to bond the veneer 3 to the surface of the fibrous sheet 2.

As shown in FIGS. 1A and 1B, the fibrous sheet 2 and the veneer 3 are bonded to the release plate 1, and the surface of the veneer 3 is polished if necessary. Then, the surface of the veneer plate 3 is painted and colored. The coating is performed by applying the paint to the surface of the veneer 3 and then wiping the surface of the veneer 3 and wiping the surface of the veneer 3 so as to rub the liquid paint onto the surface of the veneer 3 so that the paint enters the conduit of the veneer 3. After performing the operation of drying, the drying is performed. The veneer sheet 4 is formed by laminating the veneer plate 3 and the fibrous sheet 2. Since the veneer sheet 4 is adhered to the surface of the release plate 1, the veneer sheet 4 is flexible. The veneer sheet 4 does not bend due to the rigidity of the release plate 1 even when the veneer sheet 4 is easily bent. It is possible to prevent the polishing from being sufficiently performed due to bending and the wiping at the time of painting being insufficient to prevent the paint from sufficiently entering the conduit of the veneer 3. It can be painted with a beautiful finish.

Here, the fibrous sheet 2 of the veneer sheet 4
Is adhered to the surface of the release plate 1 when the surface of the veneer 3 is subjected to a treatment such as painting, and can be peeled off from the surface of the release plate 1 after the treatment such as painting. is necessary. For this purpose, as described above, as the film 6 forming the release layer of the release plate 1, polyethylene terephthalate, polypropylene, polyethylene, nylon,
Alternatively, an acrylic adhesive is used as an adhesive for bonding the fibrous sheet 2 to the release plate 1 using a resin formed of a resin selected from a blend of two or more of these. .

For example, as the film 6 forming the release layer of the release plate 1, polytetrafluoroethylene (Teflon) is used.
If the release plate 1 is used, the release property of the release plate 1 becomes too high, the adhesive strength of the fibrous sheet 2 to the release plate 1 becomes weak, and the surface of the veneer plate 3 is subjected to a treatment such as polishing or painting. When performing, the veneer sheet 4 peels off from the release plate 1, so that the polishing cannot be performed sufficiently and the wiping becomes insufficient, so that the paint cannot sufficiently enter the conduit of the veneer 3. A specific example in this case will be described. A Teflon film 6 was bonded to the surface of a substrate 5 formed of a plywood to produce a release plate 1. An acrylic adhesive is applied on the surface of the release plate 1 at a coating amount of 3 g / scale ² , and then a fibrous sheet 2 made of a polyester-based nonwoven fabric is applied thereon.
, Temperature 100 ° C, time 20 seconds, pressure 7kg / cm
^The fibrous sheet 2 was bonded to the surface of the release plate 1 by hot pressing under the conditions of 2. Next, after applying a urethane-modified vinyl-based adhesive to the surface of the fibrous sheet 2 at a coating amount of 7 g / scale ² , an oak veneer 3 is laid thereon, and the temperature is 100 ° C., the time is 60 seconds, and the pressure is 7 kg. The veneer plate 3 was bonded to the surface of the fibrous sheet 2 by hot pressing under the condition of / cm ² . In this case, there was no adhesion of the fibrous sheet 2 to the release plate 1, and the veneer sheet 4 was peeled off from the release plate 1 when the surface of the veneer 3 was polished or painted. .

For example, when the film 6 for forming the release layer of the release plate 1 is made of polyvinyl chloride,
The release property of the release plate 1 becomes too low, the adhesive force of the fibrous sheet 2 to the release plate 1 becomes too strong, and the veneer sheet 4 cannot be peeled off from the release plate 1, The sheet 4 cannot be produced. A specific example in this case will be described. A film 6 made of polyvinyl chloride is attached to the surface of the substrate 5 as described above to produce a release plate 1, and the fibrous sheet 2 is coated on the surface of the release plate 1 with an acrylic adhesive in the same manner as described above. Glued. Next, the veneer 3 was bonded to the surface of the fibrous sheet 2 with a urethane-modified vinyl adhesive in the same manner as described above. In this case, the adhesion of the fibrous sheet 2 to the release plate 1 was good, but the veneer sheet 4 could not be peeled off from the release plate 1.

Further, for example, a fibrous sheet 2
When a vinyl acetate-based adhesive is used as an adhesive for bonding the fibers, the adhesive strength of the fibrous sheet 2 to the release plate 1 is weak,
When performing processing such as polishing or painting on the surface of the veneer 3, the veneer sheet 4 is peeled off from the release plate 1, so that the polishing cannot be performed sufficiently and the wiping is insufficient, so that the paint on the conduit of the veneer 3 is formed. Cannot be sufficiently penetrated. A specific example in this case will be described. 8: 2 of polypropylene and polyethylene on the surface of the substrate 5 similar to the above.
The resin film 6 blended at a weight ratio of 3 was bonded to prepare a release plate 1. After a vinyl acetate-based adhesive was applied to the surface of the release plate 1 at a coating amount of 3 g / scale ² , the fibrous sheet 2 was bonded thereon in the same manner as described above. Next, the veneer 3 was bonded to the surface of the fibrous sheet 2 with a urethane-modified vinyl adhesive in the same manner as described above. In this case, there is no adhesion of the fibrous sheet 2 to the release plate 1,
The veneer sheet 4 was peeled off from the release plate 1 when a process such as polishing or painting was performed on the surface of the mold.

After the veneer sheet 4 is temporarily bonded to the release plate 1 as described above, the surface of the veneer plate 3 is painted and colored, and then the release plate 1 as shown in FIG. 1 to obtain a veneer sheet 4 in which the veneer plate 3 and the fibrous sheet 2 are integrally bonded. The veneer sheet 4 is used for applying surface decoration by sticking to a surface of a building material or the like. The veneer sheet 4 has flexibility in order to bend along a curved surface of the surface of the building material or the like. It is necessary to be. To this end, a modified vinyl adhesive such as urethane-modified or a latex-based adhesive is used as an adhesive for bonding the veneer 3 to the fibrous sheet 2 as described above. Is preferably formed.

For example, when a vinyl acetate adhesive is used as an adhesive for bonding the veneer 3 to the fibrous sheet 2, the veneer sheet 4 in which the veneer 3 and the fibrous sheet 2 are integrally bonded has flexibility. In short, there is a possibility that cracks or the like may occur in the veneer sheet 4 when bending along the curved surface of the surface of the building material or the like. A specific example in this case will be described. A resin film 6 in which polypropylene and polyethylene were blended at a weight ratio of 8: 2 was adhered to the surface of the substrate 5 similar to the above to produce the release plate 1. The fibrous sheet 2 was bonded to the surface of the release plate 1 with an acrylic adhesive in the same manner as described above. Next, a vinyl acetate-based adhesive was applied to the surface of the fibrous sheet 2 at an application amount of 7 g / size ² , and the veneer 3 was adhered thereon similarly as described above. In this case, release plate 1
Of the veneer sheet 4 from the release plate 1 was also good. However, the load value of the veneer sheet 4 obtained by peeling from the release plate 1 in a loop stiffness test described later is 50 g,
Veneer sheet 4 had low flexibility.

[0021]

Next, the present invention will be described specifically with reference to examples.

(Example 1) Plywood having a thickness of 3 mm was formed.
(PP) and polyethylene
Resin (PE) blended in a weight ratio of 8: 2
A release plate 1 is made by bonding a film 6 having a thickness of 25 μm.
Made. The surface of this release plate 1 is coated with an acrylic adhesive
3 g / size of (CHR11)^TwoApply with an application amount of
After this, the thickness of the polyester
0.1 mm fibrous sheet 2 is superimposed, at a temperature of 100 ° C.
Time 20 seconds, pressure 7kg / cm^TwoUnder the conditions
By bonding the fibrous sheet 2 to the surface of the release plate 1,
Was. Next, a urethane-modified vinyl-based
7g / size of adhesive (“CVC20” manufactured by Konishi Co., Ltd.) ^Two
After the application, the thickness of the oak material is set to 0.
A 2 mm veneer plate 3 is overlaid, the temperature is 100 ° C., the time is 60 seconds,
Pressure 7kg / cm^TwoBy hot pressing under the conditions of
The veneer plate 3 was bonded to the surface of the fibrous sheet 2.

Next, the surface of the veneer plate 3 is polished,
Further, a coating material ("OpaCostain" manufactured by Sanyu Paint Co., Ltd.) was applied at a coating amount of ² g / size ² and wiping was performed to rub the coating material against the surface of the veneer plate 3 to dry the coating material. At this time, the adhesion of the veneer sheet 4 composed of the veneer 3 and the fibrous sheet 2 to the release plate 1 is good, and the veneer sheet 4 does not peel off from the release plate 1 without polishing or painting. Was performed with good workability.

After the surface treatment of the veneer plate 3 as described above,
The veneer sheet 4 was peeled off from the release plate 1. The veneer sheet 4 could be easily peeled from the release plate 1 without being torn or stretched, and the releasability was good. The flexibility of the veneer sheet 4 was measured by a loop stiffness test. In the loop stiffness test, the veneer sheet 4 was cut into a size of 170 mm × 25 mm as shown in FIG. 2A to produce three test pieces 4 a, and both ends of the test piece 4 a were attached to a jig 7. Loop L with a circumference of 70 mm
Made by Toyo Seiki "Loop stiffness tester"
The test was performed by applying a load W on the loop L in an atmosphere at a test temperature of 23 ± 5 ° C. and measuring the load W when the vertical inner diameter D of the loop 7 became 10 mm. This measurement was performed for three test pieces 4a, and the average value was used as the measurement result. The measurement result was W = 18 g.

Example 2 A 25 μm thick film 6 made of polyethylene terephthalate (PET) was attached to the surface of a substrate 5 to produce a release plate 1.
In the same manner as in Example 1, a veneer sheet 4 was obtained. In the second embodiment, the adhesion of the veneer sheet 4 composed of the veneer plate 3 and the fibrous sheet 2 to the release plate 1 is as good as that of the first embodiment. Polishing and painting could be performed with good workability without peeling off from the template 1. Further, the veneer sheet 4 could be easily peeled off from the release plate 1 without being torn or stretched, and the peelability was good, although slightly inferior to the case of Example 1. Further, when a loop stiffness test was performed on the obtained veneer sheet 4, the measurement result was W = 22 g.
Met.

Example 3 The procedure of Example 1 was repeated, except that a 25 μm-thick polypropylene film 6 was attached to the surface of the substrate 5 to produce the release plate 1.
A veneer sheet 4 was obtained. In the third embodiment, the release plate 1 of the veneer sheet 4 composed of the veneer 3 and the fibrous sheet 2
The adhesion to the sheet was slightly inferior to that of Example 1, but was good. Polishing and painting could be performed with good workability without peeling of the veneer sheet 4 from the release plate 1. Further, the veneer sheet 4 could be easily peeled from the release plate 1 without being torn or stretched, and the releasability was as good as in the case of Example 1. Further, when a loop stiffness test was performed on the obtained veneer sheet 4, the measurement result was W = 20 g.

[0027]

[Table 1] As can be seen from Table 1, in each of the examples, the adhesion of the veneer sheet 4 to the release plate 1 and the releasability of the veneer sheet 4 from the release plate 1 were good. The measurement result of the loop stiffness test of the veneer sheet 4 is W
= 18 to 22 g, which is much smaller than 50 g when the above-mentioned vinyl acetate-based adhesive is used, and has high flexibility. By the way, when the dynamic storage modulus, which is an index of the flexibility of the adhesive, is shown, at 20 ° C., the acrylic adhesive is 5000 × 10 ⁶ MPa and the vinyl acetate adhesive is 6000 × 10 ⁶ MPa. On the other hand, the urethane-modified vinyl adhesive used in each Example was 8 × 10
⁶ MPa.

[0028]

As described above, according to the present invention, the fibrous sheet is adhered to the surface of the release plate, and the veneer is adhered to the surface of the fibrous sheet. Since the veneer sheet formed by bonding and integrating the fibrous sheet and the veneer plate is peeled off from the release plate, the veneer sheet is temporarily bonded to the surface of the release plate, and the veneer sheet is flexible. The veneer sheet does not bend due to the rigidity of the release plate, even if it is easy to bend, and sufficient wiping is performed when painting the surface of the veneer, and sufficient paint is applied to the conduit of the veneer This makes it easy to apply a beautiful finish to the surface of the veneer.

According to a second aspect of the present invention, a release plate is provided on the surface of the substrate by using polyethylene terephthalate, polypropylene,
Since a film of a resin selected from polyethylene, nylon and a blend of two or more of these materials is adhered and formed, the adhesion of the fibrous sheet to the release plate can be improved and the release plate can be improved. The peelability of the veneer sheet from the veneer can also be improved.

According to the third aspect of the present invention, an acrylic adhesive is used as an adhesive for bonding the fibrous sheet to the surface of the release plate, so that the adhesion of the fibrous sheet to the release plate can be improved. This can improve the peelability of the veneer sheet from the release plate.

According to a fourth aspect of the present invention, a modified vinyl-based adhesive or a latex-based adhesive is used as an adhesive for bonding the veneer to the surface of the fibrous sheet. What you can get.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention,
(A), (b), (c) are sectional views, respectively.

FIG. 2 shows a loop stiffness test;
(A) is a plan view showing the preparation of a test piece, and (b) is a schematic front view showing a test method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 release plate 2 fibrous sheet 3 veneer 4 veneer sheet 5 substrate 6 film

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Ishikawa 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Works Co., Ltd. EA13 FA13 FA21 FA28 FA31 FA33 FA37 GA03 HA01

Claims (3)

[Claims] 1. A fibrous sheet is adhered to the surface of a release plate and a veneer is adhered to the surface of the fibrous sheet. The surface of the veneer is painted and colored. A veneer sheet surface coating method, comprising peeling a veneer sheet formed by bonding and integration from a release plate. 2. The release plate is characterized in that a film of a resin selected from the group consisting of polyethylene terephthalate, polypropylene, polyethylene, nylon and a blend of two or more of these is attached to the surface of the substrate. The surface coating method for a veneer sheet according to claim 1. 3. The method for coating a surface of a veneer sheet according to claim 1, wherein the adhesive for bonding the fibrous sheet to the surface of the release plate is an acrylic adhesive.