JPS58110244A - Manufacture of decorative board material - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、各種板材の化粧面に保護被膜を形成するとこ
ろの化粧板材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing decorative board materials in which a protective coating is formed on the decorative surface of various board materials.

一般に、銘木化粧合板等の板材においては、製造日より
日数が経過するにつれて、大気中の温湿度変化で貼り合
せた板材に夫々異度合の伸縮運動が生じ、比較的薄い化
粧単板側の化粧面に幅肌５〜１．０ｍ、長さ１０〜２［
］ｍ程度の干割れが発生するものである。In general, as the number of days passes from the manufacturing date of decorative wood plywood and other board materials, changes in temperature and humidity in the atmosphere cause the bonded materials to expand and contract to different degrees, causing the decorative veneer side to be relatively thin. The width of the surface is 5-1.0 m, the length is 10-2 [
]m dry cracks occur.

その干割れ現象の発生を防止するため、従来、ロールコ
ータ、フローコータ等で化粧面に樹脂塗膜を形成するこ
とが行なわれている。然し、この塗装被膜では、板材に
生ずる伸縮運動に強度的に十分対抗することができず、
依然として干割れの発生を避は得ていない。In order to prevent the dry cracking phenomenon, conventionally, a resin coating film is formed on the decorative surface using a roll coater, a flow coater, or the like. However, this paint film is not strong enough to withstand the expansion and contraction movement that occurs in the board.
The occurrence of dry cracks is still unavoidable.

これに対し、本出願人は、板材の伸縮運動に対抗し得る
硬い保護被膜を形成するため、化粧面にホットプレス等
によ）エポキシ等の樹脂を加圧圧着すればよいこと、を
先に提案した（特願昭５３−１６３８０２号〕。然し、
この方法にては、硬い被膜を形成できるものの、エポキ
シ等の樹脂を直接化粧面に加圧付着しているため、その
表面の木理の差により樹脂の含浸度合が大きく異なり、
木理が粗な部分には樹脂が多く含浸し一方密な部分には
然程含浸しないことによる色むら状の汚れが発生してし
まう。In response to this, the present applicant has previously proposed that in order to form a hard protective film that can resist the expansion and contraction movement of the plate material, it is sufficient to apply a resin such as epoxy (using hot press, etc.) to the decorative surface. (Japanese Patent Application No. 163802/1972).However,
Although this method can form a hard film, since the resin such as epoxy is applied directly to the decorative surface under pressure, the degree of resin impregnation varies greatly depending on the grain of the surface.
Areas with coarse grains are impregnated with a large amount of resin, while areas with dense grains are not impregnated as much, resulting in uneven color stains.

鼓において、本発明者が鋭意研究を重ねたとこ口、前モ
って化粧面にフローコータ、ロールコータ等で熱硬化性
樹脂又は分子量の大きい熱可塑性樹脂を下塗りし、下塗
り塗膜の乾燥硬化後に、エポキシ等の樹脂を下塗り塗膜
上に熱圧着すれば、上述の如き色むら状の化粧面汚染が
発生しないことが判明した。これは、フローコータ、ロ
ールコータ等による塗装では、加圧することなく樹脂を
化粧面に塗布するため、その塗装樹脂が化粧面下に含浸
してしまうことがなく、更に、熱硬化性樹脂は一旦加熱
硬化すると再度加熱しても溶融せず、又熱可塑性樹脂で
も分子量の大きいものであれば、溶融しても合板表面組
織内に圧入されることがない為に、下塗り塗膜上に樹脂
を熱圧着しても含浸むらが生じないためと考えられる。The inventor of the present invention has conducted intensive research on the production of drums, and first coated the decorative surface with a thermosetting resin or a thermoplastic resin with a large molecular weight using a flow coater, roll coater, etc., and dried and hardened the undercoat film. Later, it was found that if a resin such as epoxy was bonded by thermocompression onto the undercoat film, the above-mentioned uneven color contamination of the decorative surface would not occur. This is because when painting with a flow coater, roll coater, etc., the resin is applied to the decorative surface without applying pressure, so the coating resin does not impregnate the surface under the decorative surface. Once heated and cured, it will not melt even if heated again, and even if thermoplastic resin has a large molecular weight, it will not be press-fitted into the plywood surface structure even if it melts. This is thought to be because uneven impregnation does not occur even after thermocompression bonding.

なお、分子量の大きい熱可塑性樹脂としては、酢酸ビニ
ル樹脂、ラッカー樹脂、フェノ等が挙げられる。Note that examples of the thermoplastic resin having a large molecular weight include vinyl acetate resin, lacquer resin, and phenol.

このように、化粧単板の表面にエポキシ等の熱硬化性樹
脂を熱圧着させる前に、ロールコータ。In this way, before applying thermosetting resin such as epoxy to the surface of the decorative veneer, a roll coater is used.

フローコータ等の塗装手段で予め化粧面に樹脂を含浸せ
しめることのない下塗り塗膜を形成すれば、その樹脂乾
燥硬化後にエポキシ樹脂等を熱圧着しても下塗り塗膜の
存在でエポキシ樹脂等が化粧面に含浸せず、化粧面汚染
のない高強度の化粧合板を得ることができる。If an undercoat film is formed without pre-impregnating the decorative surface with resin using a coating method such as a flow coater, even if the epoxy resin, etc. is bonded under heat after the resin dries and hardens, the presence of the undercoat film will prevent the epoxy resin, etc. It is possible to obtain high-strength decorative plywood without impregnating the decorative surface and causing no contamination of the decorative surface.

以下、本発明の詳細な説明すれば、次の通りである。Hereinafter, the present invention will be described in detail as follows.

実施例１ 基板の表面に酢酸ビニル系接着剤をスプレッダで塗布し
、化粧単板を熱圧接着して化粧合板を得た。次いで、こ
の化粧合板の表面にポリウレタン系樹脂塗料をロールコ
ータで塗布し、熱乾燥させた後、エポキシ樹脂シート（
１００ｇ／Ｊをホットプレスで加熱圧着させた。そのプ
レス条件は、圧締温度１２０℃、圧締時間１０　ｍｉｎ
　、圧締圧カフ１’ｑ／−で行った。Example 1 A vinyl acetate adhesive was applied to the surface of a substrate using a spreader, and a decorative veneer was bonded under heat and pressure to obtain a decorative plywood. Next, polyurethane resin paint is applied to the surface of this decorative plywood using a roll coater, and after heat drying, an epoxy resin sheet (
100 g/J was heat-pressed using a hot press. The pressing conditions were a pressing temperature of 120°C and a pressing time of 10 min.
, the pressure cuff was tightened at 1'q/-.

比較例１ 実施例１と同様にして得た化粧合板に、直接エポキシ樹
脂シートを加熱圧着して、化粧板材を製造した。プレス
条件は、実施例１と同一にした。Comparative Example 1 An epoxy resin sheet was directly heat-pressed onto a decorative plywood obtained in the same manner as in Example 1 to produce a decorative board material. The pressing conditions were the same as in Example 1.

比較例２ 実施例１と同様にして得た化粧合板に、ウレタン樹脂を
塗布しドライヤにより乾燥して、化粧板材を製造した。Comparative Example 2 A decorative plywood obtained in the same manner as in Example 1 was coated with urethane resin and dried with a dryer to produce a decorative board material.

とれらに対しｔｉ　ＪＡＳ規格に基づく平面引張り試験
、非熱繰返し試験、摩耗試験、引かき硬度試験（鉛侑硬
度試験機で先端角度６０°を有する鋼針を使用し、２０
０ｇの荷重を加えて試験片の表面に線状のキズを三本つ
けることによる試験）を行った。その結果は、次掲表に
示す 表 このように、実施例１では、比較例２に比して強度特性
が著しく向上していると共に、比較例１にみられる化粧
面汚染の発生がなく、表面化粧性が極めて向上している
。Planar tensile test, non-thermal cyclic test, abrasion test, scratch hardness test (using a steel needle with a tip angle of 60° with a lead hardness tester,
A test was conducted in which three linear scratches were made on the surface of the test piece by applying a load of 0 g. The results are shown in the table below. In Example 1, the strength properties were significantly improved compared to Comparative Example 2, and there was no occurrence of cosmetic surface contamination as seen in Comparative Example 1. Cosmetic properties are greatly improved.

実施例２ 下塗り塗料としてビニル系樹脂塗料を使用する他は、実
施例１と全く同様にして化粧板材を製造した。得られた
製品の表面にに含浸むらによる汚れの発生が見られず、
強度特性は実施例１、比較例１と同様のものであった 比較例２ 下塗シ塗料として、架橋剤を混入していないエポキシ樹
脂塗料を使用する他は、実施例１と同様にして化粧板材
を製造した。得られた製品の強度特性は、実施例１、比
較例１と同様優れていたが、表面に含浸むらによる汚染
が発生していた。Example 2 A decorative board material was produced in exactly the same manner as in Example 1, except that a vinyl resin paint was used as the undercoat paint. No stains due to uneven impregnation were observed on the surface of the resulting product.
Comparative Example 2 The strength characteristics were the same as those in Example 1 and Comparative Example 1. Decorative board material was prepared in the same manner as in Example 1, except that an epoxy resin paint containing no crosslinking agent was used as the undercoat paint. was manufactured. The strength characteristics of the obtained product were excellent as in Example 1 and Comparative Example 1, but the surface was contaminated due to uneven impregnation.

以上の如く、本発明に係る化粧板材の製造方法に依れば
、化粧性の良好なしか・も干割れ等の発生することのな
く、表面硬度の極めて向上した化粧材を得ることができ
る。As described above, according to the method for manufacturing a decorative board material according to the present invention, it is possible to obtain a decorative material with excellent cosmetic properties, without occurrence of dry cracks, etc., and with extremely improved surface hardness.

Claims (1)

【特許請求の範囲】[Claims] １）銘木化粧合板等の化粧面に、予めフローコータ、ロ
ールコータ等で熱硬化性樹脂又は分子量の大きい熱可塑
性樹脂を下塗り塗装し、その下塗り塗膜の乾燥硬化後熱
硬化性樹脂を下塗り塗膜上に熱圧着することにより、化
粧面保護被膜を形成するようにしたことを特徴とする化
粧版材の製造方法。1) Apply an undercoat of thermosetting resin or high molecular weight thermoplastic resin to the decorative surface of precious wood decorative plywood etc. using a flow coater, roll coater, etc. in advance, and after drying and hardening of the undercoat film, apply an undercoat of thermosetting resin. A method for producing a decorative plate material, characterized in that a decorative surface protective film is formed by thermocompression bonding on the film.