JP2000202947A - Auxiliary sheet for adhering decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give heat resistance to a laminated building material by forming a papery layer by coating and impregnating a paper base material with a resin sealer to arrive the sealer at an adhesive layer side from a front surface side of he base material. SOLUTION: In the auxiliary sheet 1, an adhesive layer 3 is interposed between a core material layer 2 and a papery layer 4, both the layers 2, 4 are adhesively integrated, and the layer 4 is formed of a paper base material 41 and an epoxy resin sealer 42. That is, both the surfaces of the layer 2 previously having corrosion resistant coat layers 22 on both the surfaces of an aluminum foil 21 are coated with a dry laminating adhesive, dried in a hot air furnace to form the adhesive layer 3, then the material 41 is adhered to the layer 3 by nipping with hot rolls while moving the material 41 along the surface of the layer 2, and then the surface of the material 41 is coated and impregnated with the sealer 42. Thus, heat resistance can be given to the laminated building material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an auxiliary sheet for attaching a decorative material.

[0002]

2. Description of the Related Art When manufacturing a laminated building material in which a decorative material such as a board with natural wood is adhered to the surface of a base material such as a plywood, the unevenness on the surface of the base material is buffered and the adhesion between the base material and the board is made. In order to enhance the strength of the sheet, an auxiliary sheet for attaching a decorative material is used. As an auxiliary sheet for attaching this decorative material,
In order to improve the fire resistance of the laminated building material, a laminated sheet in which paper is laminated on both sides of an aluminum foil via an adhesive has been proposed (see Japanese Patent Application Laid-Open No. 8-18565).

That is, in the laminated sheet, the heat applied to the surface of the laminated sheet is diffused by the aluminum foil to improve the fire resistance of the laminated building material. However, in the case of a laminated building material using this laminated sheet, there is a problem that the paper layer is peeled at an intermediate portion (hereinafter, referred to as “paper peeling”).

That is, in the case of this laminated sheet, since an aluminum foil layer exists between paper and paper, when the decorative material is adhered on this laminated sheet, the moisture of the adhesive is blocked by the aluminum foil. It remains between the paper layers.
It is thought that this moisture weakens the bonding strength of the paper fibers and causes inter-paper separation.

On the other hand, when an impregnated paper pre-impregnated with a resin is used as a paper base material, there is no problem of inter-sheet peeling as described above, but there is a problem in adhesiveness to aluminum foil, and interlayer delamination is not performed. May cause.

[0006]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides a laminated building material which can impart heat resistance to a laminated building material and has excellent durability without the problem of paper separation or delamination. It is an object of the present invention to provide an auxiliary sheet for attaching a decorative material from which a building material can be obtained.

[0007]

In order to achieve such an object, the auxiliary sheet for attaching a decorative material according to the present invention has a sheet-like shape with an adhesive layer on both sides of a core layer containing a metal foil. In an auxiliary sheet for attaching a decorative material, in which a paper layer including a paper substrate is laminated, the paper layer is used to improve adhesion to an adhesive layer, impregnation into a paper substrate, and reinforcement of fibers in the paper substrate. An excellent resin sealer was formed by applying and impregnating the paper base material so as to reach from the surface side of the paper base material to the adhesive layer side.

The paper substrate is not particularly limited, but is preferably a thin paper conventionally used as a stencil sheet. The metal foil for forming the core layer is not particularly limited as long as it is excellent in heat conductivity and handling, and examples thereof include a copper foil and an aluminum foil, and an aluminum foil is more preferable.

The core layer may be made of only a metal foil, but when the metal foil is an aluminum foil, it is preferable to provide an anticorrosion coating layer on both sides of the aluminum foil. The thickness of the aluminum foil is not particularly limited, but is preferably 20 μm or more and 50 μm or less, and 25 μm or less.
It is more preferably not less than 35 μm.

The anticorrosion coat layer is not particularly limited as long as it has good adhesion to the adhesive forming the adhesive layer and can prevent corrosion of the aluminum foil. Examples of the anticorrosion coat layer include epoxy resin paint, vinyl butyral resin and zinc chromate. And a butyral resin-based paint. The adhesive for forming the adhesive layer is not particularly limited as long as it has excellent adhesion between the paper base material and the surface of the core material layer.For example, when an epoxy resin paint is used for the anticorrosion coat layer,
Two-component polyurethane adhesives are preferred.

Examples of the resin sealer include a two-component solvent type epoxy resin sealer, an emulsion type epoxy resin sealer, a chlorinated polypropylene resin sealer, and an emulsion type acrylic resin sealer.
As described above, an epoxy resin sealer is preferable, and a two-liquid solvent type epoxy resin sealer is more preferable. The impregnated coating amount of the resin sealer is preferably set to a coating amount such that a part of the paper substrate is exposed on the surface of the paper layer as in claim 3, and when an epoxy resin sealer is used,
As described in claim 5, the weight ratio to the paper substrate is 2% or more.
%, Preferably 2% or more and 5% or less.

Further, the paper base material preferably has a basis weight of 20 g / m ² or more and 80 g / m ² or less, and has a basis weight of 25 g / m ² or more and 35 g / m ² or less. More preferred. That is, if the basis weight is too small, there is a possibility that the relief of unevenness due to the paper base material becomes insufficient, and if the basis weight is too large, there is a possibility that inter-sheet peeling may occur.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 shows one embodiment of an auxiliary sheet according to the present invention.

As shown in FIG. 1, this auxiliary sheet 1
It has a core layer 2, adhesive layers 3 and 3, and paper layers 4 and 4. The core layer 2 has an anticorrosion coat layer 22 formed on both sides of an aluminum foil 21.

The adhesive layer 3 is interposed between the core layer 2 and the paper layer 4 to bond and integrate the two layers 2 and 4 together. Paper layer 4
As shown in FIG. 2, the paper base 41 and the paper base 41
And an epoxy resin-based sealer 42 impregnated with the resin.

As shown in FIG. 2, the epoxy resin-based sealer 42 is impregnated in the paper base 41 until it reaches the adhesive layer 3 with a small portion 41a on the front side of the paper base 41 remaining. That is, the auxiliary sheet 1 is prepared by first applying an adhesive for dry lamination to both sides of the core layer 2 having the anticorrosion coating layer 22 on both sides of the aluminum foil 21 in advance.
After drying in a hot air oven to form the adhesive layer 3, the paper base 41 is adhered to the adhesive layer 3 by nipping with a hot roll while attaching the paper base 41 to the surface of the adhesive layer 3.

Next, it is obtained by applying and impregnating a resin sealer 42 from the surface of the paper base material 41.

This auxiliary sheet 1 is, for example, as shown in FIG.
As shown in (a), after applying the adhesive 5 to the surface of the base material B such as a plywood or a compression board, the auxiliary sheet 1 is adhered on the adhesive 5 by hot pressing or the like. Next,
As shown in FIG. 3 (b), after applying an adhesive 7 to the other surface of the auxiliary sheet 1, a decorative material 8 such as a board with a natural wood is attached onto the adhesive 7. Then, as shown in FIG. 3C, a heat-resistant laminated building material W can be obtained by applying a UV paint to the surface of the decorative material 8 and curing the UV paint to form the heat-resistant resin layer 9.

The paper base 41 is impregnated with a resin sealer 42, and the fibers constituting the paper base 41 are
As a result, even if moisture remains in the paper material layer 4 at the time of bonding with the decorative material 8 or the base material 4, the paper base material 41 does not cause inter-sheet separation. Therefore, a laminated building material having excellent durability can be obtained. Furthermore, since the resin sealer 42 is impregnated in the paper base material 41 while leaving a part 41a on the front side slightly, when the resin sealer 42 is bonded to the decorative material 8 or the base material 4, a part of the adhesive is The portion 41a is impregnated. Therefore, the adhesiveness with the decorative material 8 or the base material 4 is excellent.

[0020]

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

Example 1 An epoxy resin base paint (Rock Paint, epoxy primer part number 061-1109) was applied to both surfaces of a 30 μm aluminum foil (corresponding to JIS-H4160) to form an anticorrosion coat layer. After formation, an adhesive layer was formed on the surface of the anticorrosion coat layer using a urethane resin-based adhesive (CVC33, manufactured by Konishi Co., Ltd.).

On the adhesive layer, a basis weight of 30 g as a paper base material
/ M ^2, a base paper sheet (manufactured by Tenma Special Paper Co., Ltd.) was attached, and bonded and integrated by hot pressing. Next, 3% by weight of an epoxy resin-based resin sealer (manufactured by Rock Paint Co., Ltd., High Primer) was applied to the surface of the base board and impregnated to obtain an auxiliary sheet.

(Example 2) Except that the anticorrosion coat layer was formed using a butyral resin-based paint (Rock Paint, Rock Wash Primer) containing vinyl butyral resin and zinc chromate instead of the epoxy resin-based paint. An auxiliary sheet was obtained in the same manner as in Example 1.

Example 3 As an adhesive for forming an adhesive layer, a urethane resin-based adhesive (CVC33, manufactured by Konishi Co., Ltd.)
Instead of ethylene resin adhesive (Toyo Ink Co., Ltd., A
An auxiliary sheet was obtained in the same manner as in Example 1, except that D-37F1) was used.

Example 4 As a paper base material, a basis weight of 50 g /
except using m ² of reinforced paper (Sankoseishi Co.) was obtained auxiliary sheet in the same manner as in Example 1. (Example 5) paper substrate, except for using the reinforced paper having a basis weight of 65 g / m ² (Sankoseishi Co.) to obtain an auxiliary sheet in the same manner as in Example 1.

(Example 6) An auxiliary sheet was obtained in the same manner as in Example 1, except that the impregnation amount of the epoxy resin-based resin sealer was changed to 5% by weight. (Example 7) The impregnation amount of the epoxy resin-based resin sealer was 6
An auxiliary sheet was obtained in the same manner as in Example 1 except that the content was changed to% by weight.

Comparative Example An auxiliary sheet was obtained in the same manner as in Example 1 except that the paper base material was not impregnated with the resin sealer.

Using the auxiliary sheets obtained in Examples 1 to 7 and Comparative Example 1, decorative panels as laminated building materials were obtained as follows. An auxiliary sheet is bonded and integrated to the surface of a 3 mm-thick compression board (Starwood, manufactured by Hokusin) via a urethane resin-based adhesive (CVC33, manufactured by Konishi), and then vinyl acetate resin is applied to the other side of the auxiliary sheet. After applying an adhesive (KE-200M, manufactured by Oshika Shinko Co., Ltd.) containing urea resin and antimony chloride, a 0.3 mm-thick natural wood decorative veneer was attached by hot pressing at 100 ° C.

Next, a resin paint containing alkyd resin (UB Coat Sealer, manufactured by Nishizawa Sangyo Co., Ltd.) is applied to the surface of the veneer veneer, cured, and further contains an unsaturated polyester resin. Resin paint (Nishizawa Sangyo Co., Ltd.)
UB coat sanding sealer polyester) is applied and cured to form an underlayer, and then an ultraviolet curable resin paint containing an allyl resin and a polyester resin (UB coat clear manufactured by Nishizawa Sangyo Co., Ltd.) is applied and a finishing layer is applied. Was formed to obtain a decorative panel.

Each of the decorative panels obtained by using the auxiliary sheets of the examples and comparative examples as described above was subjected to a test in accordance with the JAS special plywood type 1 peel test for 10 samples each, and the paper of the auxiliary sheet layer was formed. The presence / absence of peeling was examined, and the results are shown in Table 1. In Table 1, ○ indicates that no inter-sheet peeling was observed in any of the 10 samples, and △ indicates that some samples did not.
X indicates that paper separation occurred in a part, and x indicates that paper separation occurred.

[0031]

[Table 1]

As shown in Table 1, according to the auxiliary sheet of the present invention, it can be clearly seen that a laminate having excellent durability can be obtained with almost no separation between sheets.

[0033]

As described above, the auxiliary sheet for attaching a decorative material according to the present invention can impart heat resistance to a laminated building material, and can reduce the problem of paper separation and delamination. Therefore, a laminated building material having excellent durability can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of an auxiliary sheet for attaching a decorative material according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the auxiliary sheet of FIG. 1;

FIG. 3 is an explanatory diagram for explaining a method of manufacturing a laminated building material using the auxiliary sheet of FIG. 1 in the order of steps.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Auxiliary sheet 2 Core material layer 3 Adhesive layer 4 Paper layer 21 Aluminum foil (metal foil) 22 Anticorrosion coat layer 41 Paper base material 42 Epoxy resin sealer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04C 2/12 E04C 2/12 BF Term (Reference) 2B002 AA01 AA04 BA01 BB06 BB07 DA06 2B250 AA01 BA03 BA07 CA11 DA04 EA01 EA13 FA28 FA31 FA33 GA03 2E001 DE01 GA06 GA22 GA24 HB04 HC02 HC07 HC11 HF18 LA04 2E162 CB24 CC03 CC06 CE08 EA11 4F100 AB01B AB10B AB33B AK01A AK01C AK53A AK53C BA03 BA06 BA10A BA10C BA13CBABAC BA13CBA13B00

Claims (6)

[Claims] An auxiliary sheet for attaching a decorative material in which a paper layer containing a sheet-like paper base material is laminated on both sides of a core material layer containing a metal foil via an adhesive layer, wherein the paper layer is an adhesive layer A resin sealer with excellent adhesiveness to paper base, impregnation into paper base and reinforcement of fiber in paper base is applied to paper base so as to reach from the surface side of paper base to the adhesive layer side. An auxiliary sheet for attaching a decorative material, wherein the auxiliary sheet is formed by being formed. 2. The auxiliary sheet according to claim 1, wherein the resin sealer is an epoxy resin sealer. 3. The auxiliary sheet according to claim 1, wherein a part of the paper substrate is exposed on the surface of the paper layer. 4. A paper base material having a basis weight of 20 g / m ^{2 to} 80 g / m ^2.
decorative material affixing auxiliary seat according to any one of claims 1 to 3 is m ² or less. 5. The assistant for attaching a decorative material according to claim 2, wherein the epoxy resin-based sealer is impregnated at a weight ratio of 2% to 10% with respect to the paper base material. Sheet. 6. The auxiliary sheet according to claim 1, wherein the metal foil is an aluminum foil.