JP2006231709A - Method for producing prepreg for decorative layer and decorative panel - Google Patents

Method for producing prepreg for decorative layer and decorative panel Download PDF

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JP2006231709A
JP2006231709A JP2005049823A JP2005049823A JP2006231709A JP 2006231709 A JP2006231709 A JP 2006231709A JP 2005049823 A JP2005049823 A JP 2005049823A JP 2005049823 A JP2005049823 A JP 2005049823A JP 2006231709 A JP2006231709 A JP 2006231709A
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decorative
resin
prepreg
layer
thermosetting resin
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Yasuo Zushi
康夫 頭師
Seiji Matsumoto
清二 松本
Yoshikatsu Matsushima
吉克 松島
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Sumitomo Bakelite Co Ltd
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Sumitomo Bakelite Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a prepreg for a decorative layer which is excellent in surface smoothness without spoiling the fundamental characteristics of a conventional decorative panel and can obtain a decorative panel being excellent in surface smoothness and having high glossiness and the decorative panel produced by using the prepreg obtained by the method. <P>SOLUTION: The method for producing the prepreg for the decorative layer which is used in the decorative panel includes a process (a) in which a paper substrate for the decorative layer, after being impregnated with the first thermosetting resin composition, is dried to produce resin-impregnated decorative paper, a process (b) in which the decorative paper is pressurized preliminarily, and a process (c) in which a resin layer is formed on the surface on the decorative surface side of the pressurized decorative paper by the second thermosetting resin composition. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、化粧層用プリプレグの製造方法と化粧板に関するものである。   The present invention relates to a method for producing a prepreg for a decorative layer and a decorative board.

化粧板は、表面が硬く、耐熱性や耐汚染性に優れ、意匠性においても美しい外観を有し、更に豊富な色調、色柄の中から選択できることから、家具テーブル、会議用テーブル、事務デスク等の天板、あるいは住宅やオフィスビルの内装材などに広く使用されている。   The decorative board has a hard surface, excellent heat resistance and stain resistance, has a beautiful appearance in design, and can be selected from abundant colors and patterns, so it can be used as a furniture table, conference table, office desk It is widely used for top plates such as interior materials for houses and office buildings.

化粧板の意匠性は、化粧層用基材の色調・模様や、成形時に用いられるプレスプレートの表面形状によって決定され、例えば、柄模様を有する光沢仕様の化粧板を得る場合は、化粧層用基材として柄模様が印刷されたグラビア印刷化粧紙を用い、鏡面仕上げのプレスプレートを用いて加熱加圧成形されるのが一般的である。(例えば、特許文献1参照。)。
しかし、このようにして得られた化粧板は、主に化粧層用基材の厚みや坪量の不均一性に起因する表面凹凸を有しており、表面平滑性や表面光沢度においては必ずしも充分なものではなかった。
The design of the decorative board is determined by the color tone / pattern of the base material for the decorative layer and the surface shape of the press plate used at the time of molding. For example, when obtaining a decorative decorative board with a pattern, In general, gravure decorative decorative paper on which a pattern is printed is used as a base material, and heat pressing is performed using a mirror-finished press plate. (For example, refer to Patent Document 1).
However, the decorative board obtained in this way has surface irregularities mainly due to the unevenness of the thickness and basis weight of the base material for the decorative layer, and in terms of surface smoothness and surface glossiness, it is not always necessary. It was not enough.

特開平07−285207号公報JP 07-285207 A

本発明は、従来の化粧板としての基本的特性を損なうことなく、表面平滑性に優れ、高い表面光沢度を有する化粧板が得られる化粧層用プリプレグの製造方法、ならびに、この製造方法で得られた化粧層用プリプレグを用いてなる化粧板を提供するものである。   The present invention provides a method for producing a prepreg for a decorative layer from which a decorative plate having excellent surface smoothness and high surface glossiness can be obtained without impairing the basic properties of a conventional decorative plate, and obtained by this method. Provided is a decorative board using the obtained prepreg for a decorative layer.

このような目的は、以下の本発明(1)〜(9)によって達成される。
(1)化粧板に用いられる化粧層用プリプレグの製造方法であって、
(a)化粧層用紙基材に第一の熱硬化性樹脂組成物を含浸、乾燥させ、樹脂含浸化粧紙を製造する工程、
(b)上記樹脂含浸化粧紙を予備加圧する工程、及び、
(c)上記予備加圧後の樹脂含浸化粧紙の化粧面側表面に、第二の熱硬化性樹脂組成物により樹脂層を形成する工程、
を有することを特徴とする、化粧層用プリプレグの製造方法。
(2)上記第一の熱硬化性樹脂組成物は、熱硬化性樹脂としてメラミン樹脂を含有するものである上記(1)に記載の化粧層用プリプレグの製造方法。
(3)上記第二の熱硬化性樹脂組成物は、熱硬化性樹脂とともに、一次粒子の平均粒径が5〜500nmである無機充填材を含有するものである上記(1)又は(2)に記載の化粧層用プリプレグの製造方法。
(4)上記無機充填材は、シリカを含有するものである上記(3)に記載の化粧層用プリプレグの製造方法。
(5)上記第二の熱硬化性樹脂組成物は、熱硬化性樹脂としてメラミン樹脂を含有するものである上記(1)ないし(4)のいずれかに記載の化粧層用プリプレグの製造方法。
(6)上記(b)工程において予備加圧する際の圧力は、3〜20MPaである上記(1)ないし(5)のいずれかに記載の化粧層用プリプレグの製造方法。
(7)上記(c)工程において形成される樹脂層の厚みは、5〜50μmである上記(1)ないし(6)のいずれかに記載の化粧層用プリプレグの製造方法。
(8)上記(1)ないし(7)のいずれかに記載の製造方法で得られた化粧層用プリプレグを、芯材層用プリプレグを含む化粧板用材料の表面側に積層し、これを加熱加圧成形してなることを特徴とする化粧板。
(9)化粧層表面に5〜40μmの表面樹脂層を有する上記(8)に記載の化粧板。
Such an object is achieved by the following present inventions (1) to (9).
(1) A method for producing a prepreg for a decorative layer used for a decorative board,
(A) impregnating the first thermosetting resin composition on the decorative layer paper base material and drying it to produce a resin-impregnated decorative paper;
(B) pre-pressurizing the resin-impregnated decorative paper, and
(C) forming a resin layer with a second thermosetting resin composition on the decorative surface side surface of the resin-impregnated decorative paper after the pre-pressurization,
The manufacturing method of the prepreg for decorative layers characterized by having.
(2) The method for producing a prepreg for a decorative layer according to (1), wherein the first thermosetting resin composition contains a melamine resin as a thermosetting resin.
(3) Said 2nd thermosetting resin composition contains the inorganic filler whose average particle diameter of a primary particle is 5-500 nm with a thermosetting resin, said (1) or (2) The manufacturing method of the prepreg for decorative layers as described in any one of.
(4) The said inorganic filler is a manufacturing method of the prepreg for decorative layers as described in said (3) which contains a silica.
(5) The method for producing a prepreg for a decorative layer according to any one of (1) to (4), wherein the second thermosetting resin composition contains a melamine resin as a thermosetting resin.
(6) The method for producing a prepreg for a decorative layer according to any one of the above (1) to (5), wherein the pressure when pre-pressurizing in the step (b) is 3 to 20 MPa.
(7) The method for producing a prepreg for a decorative layer according to any one of (1) to (6), wherein the thickness of the resin layer formed in the step (c) is 5 to 50 μm.
(8) The decorative layer prepreg obtained by the production method according to any one of (1) to (7) above is laminated on the surface side of the decorative board material including the core layer prepreg, and this is heated. A decorative board formed by pressure molding.
(9) The decorative board according to (8), wherein the decorative layer has a surface resin layer of 5 to 40 μm on the surface.

本発明の製造方法により得られた化粧層用プリプレグを用いて化粧板を製造することにより、従来の化粧板としての基本的特性を損なうことなく、表面平滑性に優れ、高い表面光沢度を有する化粧板が得られる。   By producing a decorative board using the decorative layer prepreg obtained by the manufacturing method of the present invention, it has excellent surface smoothness and high surface gloss without impairing the basic properties as a conventional decorative board. A decorative board is obtained.

以下、本発明の化粧層用プリプレグの製造方法、及び、化粧板について説明する。
本発明の化粧層用プリプレグの製造方法(以下、単に「製造方法」ということがある)は、化粧板に用いられる化粧層用プリプレグの製造方法であって、
(a)化粧層用紙基材に第一の熱硬化性樹脂組成物を含浸、乾燥させ、樹脂含浸化粧紙を製造する工程、
(b)上記樹脂含浸化粧紙を予備加圧する工程、及び、
(c)上記予備加圧後の樹脂含浸化粧紙の化粧面側表面に、第二の熱硬化性樹脂組成物により樹脂層を形成する工程、
を有することを特徴とする。
Hereinafter, the manufacturing method of the prepreg for decorative layers of this invention and a decorative board are demonstrated.
The method for producing a prepreg for a decorative layer of the present invention (hereinafter sometimes simply referred to as “manufacturing method”) is a method for producing a prepreg for a decorative layer used for a decorative board,
(A) impregnating the first thermosetting resin composition on the decorative layer paper base material and drying it to produce a resin-impregnated decorative paper;
(B) pre-pressurizing the resin-impregnated decorative paper, and
(C) forming a resin layer with a second thermosetting resin composition on the decorative surface side surface of the resin-impregnated decorative paper after the pre-pressurization,
It is characterized by having.

また、本発明の化粧板は、上記本発明の製造方法で得られた化粧層用プリプレグを、芯材層用プリプレグを含む化粧板用材料の表面側に積層し、これを加熱加圧成形してなることを特徴とする。   The decorative board of the present invention is obtained by laminating the decorative layer prepreg obtained by the production method of the present invention on the surface side of the decorative board material including the core layer prepreg, and subjecting the laminate to heat and pressure molding. It is characterized by.

まず、本発明の製造方法について詳細に説明する。
本発明の製造方法は、まず、
(a)化粧層用紙基材に第一の熱硬化性樹脂組成物を含浸、乾燥させ、樹脂含浸化粧紙を製造する工程、
を有する。
First, the production method of the present invention will be described in detail.
First, the production method of the present invention includes:
(A) impregnating the first thermosetting resin composition on the decorative layer paper base material and drying it to produce a resin-impregnated decorative paper;
Have

上記(a)工程で用いられる化粧層用紙基材としては特に限定されないが、例えば、セルロース抄造紙にグラビア印刷などにより色柄や模様を印刷した化粧紙などを用いることができる。
紙基材の坪量としても特に限定されないが、通常、30〜200g/mのものを用いることができる。
Although it does not specifically limit as a decorative layer paper base material used at the said (a) process, For example, the decorative paper etc. which printed the color pattern and the pattern by the gravure printing etc. can be used for cellulose papermaking.
The basis weight of the paper base material is not particularly limited, but usually 30 to 200 g / m 2 can be used.

上記(a)工程で用いられる第一の熱硬化性樹脂組成物は、熱硬化性樹脂を含有するものである。
ここで熱硬化性樹脂としては特に限定されないが、例えば、レゾール型、ノボラック型などのフェノール樹脂、ビスフェノールA型、ビスフェノールF型樹脂などのビスフェノール型エポキシ樹脂、ノボラック型エポキシ樹脂、ビフェニル型エポキシ樹脂などのエポキシ樹脂、ユリア(尿素)樹脂、メラミン樹脂、不飽和ポリエステル樹脂、ポリウレタン樹脂、シアリルフタレート樹脂、シリコーン樹脂などが挙げられる。これらは単独で用いることもできるし、二種類以上を併せて用いることもできる。
The first thermosetting resin composition used in the step (a) contains a thermosetting resin.
Although it does not specifically limit as a thermosetting resin here, For example, phenol resins, such as a resol type and a novolak type, bisphenol type epoxy resins, such as a bisphenol A type and a bisphenol F type resin, a novolak type epoxy resin, a biphenyl type epoxy resin Epoxy resin, urea (urea) resin, melamine resin, unsaturated polyester resin, polyurethane resin, sialyl phthalate resin, silicone resin, and the like. These can be used alone or in combination of two or more.

これらの熱硬化性樹脂の中でも、メラミン樹脂を含有するものを用いることが好ましい。メラミン樹脂は透明性が高く、変色・黄変しにくいので、化粧層用紙基材に印刷された色柄や模様を損なうことが少ない。   Among these thermosetting resins, those containing a melamine resin are preferably used. Melamine resin is highly transparent and hardly discolored or yellowed, so that the color pattern or pattern printed on the decorative layer paper base material is less likely to be damaged.

上記第一の熱硬化性樹脂組成物としては、上記熱硬化性樹脂のほかにも、硬化剤、硬化促進剤のような硬化剤、カップリング剤、界面活性剤、顔料などの各種添加剤を配合することができる。   In addition to the thermosetting resin, the first thermosetting resin composition includes various additives such as a curing agent such as a curing agent and a curing accelerator, a coupling agent, a surfactant, and a pigment. Can be blended.

上記(a)工程において、樹脂含浸化粧紙を製造する方法としては、公知の手法を適用することができる。
例えば、上記第一の熱硬化性樹脂組成物を有機溶剤や水などの溶剤に溶解又は分散混合して樹脂組成物ワニスを調製し、これを化粧層用紙基材に含浸させた後、所定温度で乾燥することにより、所定量の第一の熱硬化性樹脂組成物を担持させるとともに、熱硬化性樹脂の反応を中途まで進行させたBステージの樹脂含浸化粧紙を得ることができる。
上記乾燥する温度は、用いる熱硬化性樹脂の種類により各々好適な温度範囲を選択することができるが、例えば熱硬化性樹脂としてメラミン樹脂を用いた場合は、通常、100〜150℃で実施することができる。
In the step (a), a known method can be applied as a method for producing the resin-impregnated decorative paper.
For example, a resin composition varnish is prepared by dissolving or dispersing and mixing the first thermosetting resin composition in a solvent such as an organic solvent or water, and impregnating the decorative layer paper substrate with a predetermined temperature. By drying in step B, a B-stage resin-impregnated decorative paper in which a predetermined amount of the first thermosetting resin composition is supported and the reaction of the thermosetting resin has progressed halfway can be obtained.
Although the said drying temperature can each select a suitable temperature range with the kind of thermosetting resin to be used, for example, when a melamine resin is used as a thermosetting resin, it is normally implemented at 100-150 degreeC. be able to.

上記(a)工程で得られる樹脂含浸化粧紙において、化粧層用紙基材と第一の熱硬化性樹脂組成物との比率は特に限定されないが、樹脂含浸化粧紙全体に対して、第一の熱硬化性樹脂組成物(固形分)の割合が40〜60重量%であるものを好適に用いることができる。   In the resin-impregnated decorative paper obtained in the step (a), the ratio of the decorative layer paper base material to the first thermosetting resin composition is not particularly limited. What has a ratio of the thermosetting resin composition (solid content) of 40 to 60% by weight can be suitably used.

次に、本発明の製造方法においては、
(b)上記樹脂含浸化粧紙を予備加圧する工程、
を有する。
Next, in the production method of the present invention,
(B) a step of pre-pressurizing the resin-impregnated decorative paper;
Have

上記(b)工程は、上記(a)工程で得られた樹脂含浸化粧紙を、化粧板を製造する前に予備加圧するものである。これにより、主に化粧層用紙基材の厚みや坪量の不均一性に起因する樹脂含浸化粧紙の表面凹凸を低減させ、樹脂含浸化粧紙の平滑性を高めることができる。
そして、このように平滑性の高い樹脂含浸化粧紙に、後述する(c)工程において表面に樹脂層を形成することにより、厚みの均一性が高い表面樹脂層を化粧板表面に形成することができ、化粧板に高い表面平滑性と表面光沢性を付与することができる。
In the step (b), the resin-impregnated decorative paper obtained in the step (a) is pre-pressurized before producing a decorative board. Thereby, the surface unevenness | corrugation of the resin impregnated decorative paper mainly resulting from the nonuniformity of the thickness and basis weight of the decorative layer paper base material can be reduced, and the smoothness of the resin impregnated decorative paper can be enhanced.
Further, by forming a resin layer on the surface of the resin-impregnated decorative paper having a high smoothness in the step (c) described later, a surface resin layer having a high thickness uniformity can be formed on the surface of the decorative board. It is possible to impart high surface smoothness and surface gloss to the decorative board.

樹脂含浸化粧紙を予備加圧する方法としては特に限定されないが、例えば、樹脂含浸化粧紙を平板プレス装置で加圧する方法、所定のクリアランスを有したロール対間を通す方法、などが挙げられる。   The method of pre-pressing the resin-impregnated decorative paper is not particularly limited, and examples thereof include a method of pressing the resin-impregnated decorative paper with a flat plate press and a method of passing between a pair of rolls having a predetermined clearance.

平板プレス装置で加圧する方法を適用する場合は、樹脂含浸化粧紙1枚を2枚のプレスプレート(鏡面板)で挟んで実施することが好ましい。このほか、樹脂含浸化粧紙と鏡面板とを交互に積層して、複数枚数の樹脂含浸化粧紙について同時に処理する方法によってもよい。これにより、平滑性の高い樹脂含浸化粧紙を得ることができる。
また、所定のクリアランスを有したロール対間を通す方法による場合は、樹脂含浸化粧紙に圧力が作用する時間が短時間であるため、複数対のロール間を通して行うことが好ましい。
When applying the method of pressurizing with a flat plate press apparatus, it is preferable that one resin impregnated decorative paper is sandwiched between two press plates (mirror plates). In addition to this, a method may be employed in which resin-impregnated decorative paper and mirror-finished plates are alternately laminated, and a plurality of resin-impregnated decorative papers are processed simultaneously. Thereby, the resin-impregnated decorative paper having high smoothness can be obtained.
In the case of using a method of passing between a pair of rolls having a predetermined clearance, it is preferable that the pressure is applied to the resin-impregnated decorative paper for a short time.

上記予備加圧する際の条件としては特に限定されないが、例えば平板プレス装置を用いる場合には、圧力3〜20MPaで実施することが好ましい。これにより、上記効果を充分に発現させることができる。
また、上記圧力下での加圧時間としては特に限定されないが、20〜120秒間実施することができる。
また、温度は、常温で実施することもできるし、樹脂含浸化粧紙に担持された樹脂組成物が溶融しない程度の温度で加温して行うこともできる。
Although it does not specifically limit as conditions at the time of the said prepressurization, For example, when using a flat plate press apparatus, it is preferable to implement by the pressure of 3-20 Mpa. Thereby, the said effect can fully be expressed.
Moreover, it is although it does not specifically limit as a pressurization time under the said pressure, It can implement for 20 to 120 second.
Moreover, the temperature can be carried out at room temperature or can be carried out by heating at a temperature at which the resin composition carried on the resin-impregnated decorative paper does not melt.

次に、本発明の製造方法においては、
(c)上記予備加圧後の樹脂含浸化粧紙の化粧面側表面に、第二の熱硬化性樹脂組成物により樹脂層を形成する工程、
を有する。
Next, in the production method of the present invention,
(C) forming a resin layer with a second thermosetting resin composition on the decorative surface side surface of the resin-impregnated decorative paper after the pre-pressurization,
Have

上記(c)工程で用いられる第二の熱硬化性樹脂組成物は、熱硬化性樹脂を含有するものである。
ここで熱硬化性樹脂としては特に限定されないが、例えば、レゾール型、ノボラック型などのフェノール樹脂、ビスフェノールA型、ビスフェノールF型樹脂などのビスフェノール型エポキシ樹脂、ノボラック型エポキシ樹脂、ビフェニル型エポキシ樹脂などのエポキシ樹脂、ユリア(尿素)樹脂、メラミン樹脂、不飽和ポリエステル樹脂、ポリウレタン樹脂、シアリルフタレート樹脂、シリコーン樹脂などが挙げられる。これらは単独で用いることもできるし、二種類以上を併せて用いることもできる。
The second thermosetting resin composition used in the step (c) contains a thermosetting resin.
Although it does not specifically limit as a thermosetting resin here, For example, phenol resins, such as a resol type and a novolak type, bisphenol type epoxy resins, such as a bisphenol A type and a bisphenol F type resin, a novolak type epoxy resin, a biphenyl type epoxy resin Epoxy resin, urea (urea) resin, melamine resin, unsaturated polyester resin, polyurethane resin, sialyl phthalate resin, silicone resin, and the like. These can be used alone or in combination of two or more.

これらの熱硬化性樹脂の中でも、メラミン樹脂を含有するものを用いることが好ましい。メラミン樹脂は透明性が高く、変色・黄変しにくいので、化粧層用紙基材に印刷された色柄や模様を損なうことが少ない。また、表面硬度や耐薬品性にも優れるので、表面耐衝撃強度の高い化粧板を得ることができる。   Among these thermosetting resins, those containing a melamine resin are preferably used. Melamine resin is highly transparent and hardly discolored or yellowed, so that the color pattern or pattern printed on the decorative layer paper base material is less likely to be damaged. Moreover, since the surface hardness and chemical resistance are also excellent, a decorative board with high surface impact strength can be obtained.

上記第二の熱硬化性樹脂組成物としては、上記熱硬化性樹脂のほか、硬化剤、硬化促進剤のような硬化剤のほか、カップリング剤、界面活性剤、顔料などの各種添加剤を配合することができる。   In addition to the thermosetting resin, the second thermosetting resin composition includes a curing agent such as a curing agent and a curing accelerator, and various additives such as a coupling agent, a surfactant, and a pigment. Can be blended.

また、第二の熱硬化性樹脂組成物は、上記熱硬化性樹脂のほか、一次粒子の平均粒径が5〜500nmである無機充填材(以下、単に「微粒充填材」という)を含有することができる。
これにより、化粧板の表面光沢度、表面硬度、耐摩耗性を向上させることができる。
The second thermosetting resin composition contains, in addition to the thermosetting resin, an inorganic filler (hereinafter, simply referred to as “fine particle filler”) having an average primary particle size of 5 to 500 nm. be able to.
Thereby, the surface glossiness, surface hardness, and abrasion resistance of a decorative board can be improved.

ここで用いられる微粒充填材としては特に限定されないが、例えば、無水シリカ、コロイダルシリカのようなシリカ、マグネシア、ジルコニア、シリコンカーバイド、無水酸化アルミ、二酸化チタン、炭酸カルシウム、ケイ酸アルミン酸マグネシウムなどを用いることができる。   The fine particle filler used here is not particularly limited, for example, silica such as anhydrous silica, colloidal silica, magnesia, zirconia, silicon carbide, anhydrous aluminum oxide, titanium dioxide, calcium carbonate, magnesium aluminate silicate, etc. Can be used.

これらの微粒充填材の中でも、無水シリカ、コロイダルシリカのようなシリカを含有するものであることが好ましい。シリカは安全性が高く、また、比較的低価格で入手することができるので、化粧板を製造するコストの高騰を抑えることができる。
そして特に、コロイダルシリカを用いることが好ましい。コロイダルシリカは取り扱い性に優れるとともに、第二の熱硬化性樹脂組成物中へ容易に分散させることができる。
Among these fine particle fillers, those containing silica such as anhydrous silica and colloidal silica are preferable. Since silica is highly safe and can be obtained at a relatively low price, it is possible to suppress an increase in cost for manufacturing a decorative board.
In particular, it is preferable to use colloidal silica. Colloidal silica is excellent in handleability and can be easily dispersed in the second thermosetting resin composition.

また、シリカを水あるいは有機溶剤中に分散させた形態のものも好ましく用いることができる。このような形態のシリカを得る方法としては特に限定されないが、例えば、クレアミックス(エム・テクニック社製)、T.K.フィルミックス(特殊機化工業社製)などの高速撹拌装置を用いて、水あるいは有機溶剤中に所定量のシリカ粒子を高速で撹拌して分散させる方法により得ることができる。   Moreover, the form which disperse | distributed the silica in water or the organic solvent can also be used preferably. The method for obtaining the silica in such a form is not particularly limited. For example, Claremix (manufactured by M Technique), T.C. K. It can be obtained by a method in which a predetermined amount of silica particles is stirred and dispersed in water or an organic solvent at high speed using a high-speed stirring device such as Filmix (manufactured by Tokushu Kika Kogyo Co., Ltd.).

第二の熱硬化性樹脂組成物に用いられる微粒充填材は、一次粒子の平均粒径が5〜500nmである。これにより、微粒充填材を含有する第二の熱硬化性樹脂組成物により樹脂層を形成しても、樹脂層の下側にある化粧紙に印刷された色柄や模様による意匠性を実質的に損なうことがない。
また、このように粒径が極めて小さい粒子を分散させた樹脂組成物から樹脂層を形成することにより、樹脂層中の熱硬化性樹脂が微小なマトリックスに分割され、このマトリックス単位で熱硬化性樹脂の硬化収縮や温度収縮による寸法変化を少しずつ吸収することができるので、化粧板の表面樹脂層にクラックを生じたり、これにより表面硬度や意匠性が低下したりするのを抑えることができる。
このような目的のためには、上記微粒充填材は、一次粒子の平均粒径が10〜50nmのものであることがさらに好ましい。
The fine particle filler used in the second thermosetting resin composition has an average primary particle diameter of 5 to 500 nm. Thereby, even if the resin layer is formed by the second thermosetting resin composition containing the fine particle filler, the design property by the color pattern or pattern printed on the decorative paper under the resin layer is substantially reduced. There is no loss.
In addition, by forming a resin layer from a resin composition in which particles having a very small particle diameter are dispersed in this way, the thermosetting resin in the resin layer is divided into minute matrices, and thermosetting is performed in this matrix unit. Since it is possible to absorb dimensional changes due to curing shrinkage and temperature shrinkage of the resin little by little, it is possible to suppress the surface resin layer of the decorative board from being cracked and thereby reducing the surface hardness and design properties. .
For such purposes, it is more preferable that the fine filler has a primary particle average particle size of 10 to 50 nm.

微粒充填材の一次粒子の平均粒径が上記下限値より小さいと、第二の熱硬化性樹脂組成物を用いて樹脂組成物ワニスを調製する際に、微粒充填材の配合量によっては粘度が高くなりやすく、作業性が低下することがある。また、上記上限値を越えると、化粧板の意匠性を低下させたり、化粧板の表面平滑性が低下したりすることがある。また、樹脂層中において熱硬化性樹脂を微小なマトリックスに分割する効果が低下することがある。   When the average particle diameter of the primary particles of the fine filler is smaller than the lower limit, the viscosity may be increased depending on the amount of the fine filler when the resin composition varnish is prepared using the second thermosetting resin composition. It tends to be high and workability may be reduced. Moreover, when the said upper limit is exceeded, the designability of a decorative board may be reduced, or the surface smoothness of a decorative board may fall. In addition, the effect of dividing the thermosetting resin into a fine matrix in the resin layer may be reduced.

上記(c)工程で用いられる第二の熱硬化性樹脂組成物において、熱硬化性樹脂と微粒充填材との配合割合としては特に限定されないが、熱硬化性樹脂100重量部に対して、1〜50重量部であることが好ましい。さらに好ましくは2〜40重量部である。
微粒充填材の配合割合が上記下限値未満では、微粒充填材を配合する効果を充分に発現できないことがある。また、上記上限値を越えると、樹脂組成物ワニスを調製する際に粘度が高くなりやすく、作業性が低下することがある。また、流動性が過小になり化粧板の表面平滑性が低下することがある。
In the second thermosetting resin composition used in the step (c), the mixing ratio of the thermosetting resin and the fine particle filler is not particularly limited, but is 1 for 100 parts by weight of the thermosetting resin. It is preferable that it is -50 weight part. More preferably, it is 2 to 40 parts by weight.
When the blending ratio of the fine filler is less than the above lower limit value, the effect of blending the fine filler may not be sufficiently exhibited. On the other hand, when the above upper limit is exceeded, the viscosity tends to increase when preparing the resin composition varnish, and workability may be reduced. Moreover, fluidity | liquidity becomes too small and the surface smoothness of a decorative board may fall.

上記(c)工程において、樹脂含浸化粧紙の化粧面側表面に、第二の熱硬化性樹脂組成物により樹脂層を形成する方法としては特に限定されないが、例えば、上記第二の熱硬化性樹脂組成物を有機溶剤や水などの溶剤に溶解又は分散混合して樹脂組成物ワニスを調製し、これを樹脂含浸化粧紙の化粧面側表面に塗工して、次いで所定の温度で乾燥することにより樹脂層を形成させることができる。
樹脂含浸化粧紙の化粧面側表面に樹脂組成物ワニスを塗工する方法としては例えば、コンマコーターやロールコーターなどを用いて塗工する方法、薄膜スプレー装置などの噴霧装置を用いて塗工する方法、などが挙げられる。
なお、上記樹脂層は、上記樹脂組成物ワニスを塗工後、ワニスを調製する際に用いた溶剤を除去するだけでもよいし、熱硬化性樹脂の反応を中途まで進行させたBステージまで処理して形成することもできる。
In the step (c), the method for forming the resin layer on the decorative surface side surface of the resin-impregnated decorative paper with the second thermosetting resin composition is not particularly limited. For example, the second thermosetting A resin composition varnish is prepared by dissolving or dispersing and mixing a resin composition in a solvent such as an organic solvent or water. The resin composition varnish is applied to the decorative surface side surface of the resin-impregnated decorative paper, and then dried at a predetermined temperature. Thus, a resin layer can be formed.
Examples of the method for applying the resin composition varnish to the decorative surface side surface of the resin-impregnated decorative paper include, for example, a method using a comma coater or a roll coater, and a spray device such as a thin film spray device. Method, etc.
In addition, the said resin layer may just remove the solvent used when preparing the varnish after coating the said resin composition varnish, or it is processed to the B stage in which the reaction of the thermosetting resin progressed halfway. It can also be formed.

上記第二の熱硬化性樹脂組成物を用いて樹脂組成物ワニスを調製する方法としては特に限定されないが、熱硬化性樹脂、微粒充填材、添加剤などを所定量配合し、これを溶解又は分散する溶媒とともに撹拌混合することによって得られる。
ここで撹拌混合する方法としては特に限定されないが、例えば、通常の撹拌羽根を備えた撹拌装置、ディスパーザー、ホモミキサーのほか、高速撹拌装置として、例えば、クレアミックス(エム・テクニック社製)、T.K.フィルミックス(特殊機化工業社製)などを用いることができる。これらの中でも、上記高速撹拌装置を用いることが好ましい。これにより、微粒充填材の分散性を高め、熱硬化性樹脂と微粒充填材との均一混合性を高めることができる。
The method for preparing the resin composition varnish using the second thermosetting resin composition is not particularly limited, but a predetermined amount of a thermosetting resin, a fine filler, an additive, and the like are mixed and dissolved or dissolved. It is obtained by stirring and mixing with a solvent to be dispersed.
Although it does not specifically limit as a method of stirring and mixing here, For example, besides a stirrer equipped with a normal stirrer blade, a disperser, a homomixer, as a high-speed stirrer, for example, Claremix (M Technique Co., Ltd.), T.A. K. Filmix (made by Special Machine Industry Co., Ltd.) can be used. Among these, it is preferable to use the high-speed stirring device. Thereby, the dispersibility of a fine particle filler can be improved and the uniform mixing property of a thermosetting resin and a fine particle filler can be improved.

上記(c)工程において形成される樹脂層の厚みは特に限定されないが、5〜50μmであることが好ましい。これにより、表面平滑性に優れ、表面光沢度の高い化粧板を得ることができる。
樹脂層の厚みが上記下限値未満では、化粧板に形成される表面樹脂層の厚みが充分ではなく、表面平滑性や表面光沢度を向上させる効果が充分でないことがある。また、上記上限値を超える厚みの樹脂層を形成することはできるが、上記効果のさらなる向上がみられ
ず、経済的でないことがある。
Although the thickness of the resin layer formed in the said (c) process is not specifically limited, It is preferable that it is 5-50 micrometers. Thereby, the decorative board which is excellent in surface smoothness and has high surface glossiness can be obtained.
When the thickness of the resin layer is less than the above lower limit, the thickness of the surface resin layer formed on the decorative board is not sufficient, and the effect of improving the surface smoothness and surface glossiness may not be sufficient. Moreover, although the resin layer of the thickness exceeding the said upper limit can be formed, the further improvement of the said effect is not seen but it may not be economical.

本発明の製造方法においては、上記(b)工程において予備加圧された樹脂含浸化粧紙の表面に上記樹脂層を形成することを特徴とする。これにより、予備加圧されない樹脂含浸化粧紙を用いた場合に比べて、樹脂層としても均一性が高い厚みのものを容易に得ることができる。
そして、ここで形成された厚みの均一性が高い樹脂層は、化粧板の製造時においても実質的にその均一性が保持されやすいため、厚みの均一性が高い表面樹脂層を有した化粧板を得ることができ、表面平滑性や表面光沢度など、本発明の作用を効果的に発現することができる。
The production method of the present invention is characterized in that the resin layer is formed on the surface of the resin-impregnated decorative paper pre-pressurized in the step (b). Thereby, compared with the case where the resin-impregnated decorative paper that is not pre-pressurized is used, a resin layer having a highly uniform thickness can be easily obtained.
And since the resin layer with high uniformity of thickness formed here is substantially easy to maintain the uniformity even when the decorative plate is manufactured, the decorative plate having a surface resin layer with high uniformity of thickness And the effects of the present invention such as surface smoothness and surface glossiness can be effectively expressed.

次に、本発明の化粧板について説明する。
本発明の化粧板は、上記本発明の製造方法で得られた化粧層用プリプレグを、芯材層用プリプレグを含む化粧板用材料の表面側に積層し、これを加熱加圧成形してなることを特徴とする。
Next, the decorative board of the present invention will be described.
The decorative board of the present invention is obtained by laminating the decorative layer prepreg obtained by the production method of the present invention on the surface side of the decorative board material including the core material layer prepreg, and heating and pressing it. It is characterized by that.

本発明の化粧板において、芯材層用プリプレグは芯材層を形成するために用いられるものである。
芯材層用プリプレグに用いられる基材としては特に限定されないが、例えば、天然有機繊維、ガラス等の無機繊維、ポリエステル等の合成繊維などを単独もしくは混紡、混抄により複数種用いた紙、織布、あるいは不織布などが使用できる。
これらの中でも、高圧メラミン化粧板用としては、通常、坪量50〜250g/mのクラフト紙を用いることができる。また、難燃性又は不燃性の化粧板用としては、坪量30〜200g/mのガラス不織布やガラス織布を用いることができる。
In the decorative board of the present invention, the prepreg for the core material layer is used for forming the core material layer.
The base material used for the core layer prepreg is not particularly limited. For example, natural or organic fibers, inorganic fibers such as glass, synthetic fibers such as polyester, etc. Or a nonwoven fabric etc. can be used.
Among these, kraft paper having a basis weight of 50 to 250 g / m 2 can be usually used for a high-pressure melamine decorative board. Moreover, as a flame-retardant or non-flammable decorative board, a glass nonwoven fabric or glass woven fabric having a basis weight of 30 to 200 g / m 2 can be used.

本発明の化粧板に用いられる芯材層用プリプレグは、上記基材に、熱硬化性樹脂、あるいは、熱硬化性樹脂と無機充填材を主成分とする樹脂ワニスを含浸又は担持させ、硬化性樹脂の反応をBステージまで進行させたものを好適に用いることができる。   The prepreg for the core material layer used in the decorative board of the present invention is obtained by impregnating or carrying a thermosetting resin or a resin varnish mainly composed of a thermosetting resin and an inorganic filler on the base material. What advanced the reaction of resin to B stage can be used conveniently.

本発明の化粧板の構成としては、例えば、芯材層用プリプレグの所定枚数を積層して、その両表面側に本発明の化粧層用プリプレグを1枚ずつ用いることもできるし、芯材層用プリプレグの所定枚数を積層して、その片表面側に本発明の化粧層用プリプレグを1枚用い、反対側の表面側にはバック層用プリプレグを用いることもできる。   As a configuration of the decorative board of the present invention, for example, a predetermined number of core layer prepregs may be laminated, and one decorative layer prepreg of the present invention may be used on both surface sides. It is also possible to laminate a predetermined number of prepregs for use, use one decorative layer prepreg of the present invention on one surface side, and use a back layer prepreg on the opposite surface side.

本発明の化粧板はこのように、化粧層用プリプレグ、芯材層用プリプレグなどを所定の順序で積層し、平板プレス装置等を用いてこれらを加熱加圧成形することにより製造することができる。
加熱加圧成形の条件としては特に限定されないが、例えば、温度130〜170℃、圧力4〜10MPa、時間20〜120分間により行うことができる。
Thus, the decorative board of the present invention can be produced by laminating a prepreg for a decorative layer, a prepreg for a core material layer, and the like in a predetermined order and then heat-pressing them using a flat plate press or the like. .
Although it does not specifically limit as conditions of heat-press molding, For example, it can carry out by the temperature of 130-170 degreeC, the pressure of 4-10 MPa, and time 20-120 minutes.

本発明の化粧板において、化粧板表面に形成される表面樹脂層の厚みとしては特に限定されないが、5〜40μmとすることができる。これにより、表面平滑性に優れ、高い表面光沢度を有する化粧板とすることができる。表面樹脂層の厚みが上記下限値未満では、表面平滑性や表面光沢度が充分に向上しないことがある。
この表面樹脂層は、化粧板の平面方向において、厚みの均一性が高いことが好ましい。これにより、上記効果に加えて、化粧板の意匠性の均一性を高めることができる。
In the decorative board of the present invention, the thickness of the surface resin layer formed on the decorative board surface is not particularly limited, but may be 5 to 40 μm. Thereby, it can be set as the decorative board which is excellent in surface smoothness and has high surface glossiness. When the thickness of the surface resin layer is less than the above lower limit, the surface smoothness and surface glossiness may not be sufficiently improved.
The surface resin layer preferably has high thickness uniformity in the plane direction of the decorative board. Thereby, in addition to the said effect, the uniformity of the designability of a decorative board can be improved.

以上に説明したように、本発明の化粧層用プリプレグは、樹脂含浸化粧紙を予備加圧し、樹脂含浸化粧紙の平滑性を高めた後、その化粧面側表面に樹脂層が形成されたものである。
そして、このような樹脂層を有する化粧層用プリプレグを用いることにより、厚みの均一性が高い表面樹脂層を有する化粧板を製造することができ、得られた化粧板は、高い表面平滑性、表面光沢度を有する。
また、表面樹脂層が微粒充填材を含有するものとすることにより、耐磨耗特性や表面硬度を向上させることができる。
本発明の化粧板は例えば、家具、事務用品、建築用内装材などに好適に用いることができるものである。
As described above, the decorative layer prepreg of the present invention is obtained by pre-pressing a resin-impregnated decorative paper to enhance the smoothness of the resin-impregnated decorative paper, and then forming a resin layer on the decorative surface side surface thereof It is.
And by using a prepreg for a decorative layer having such a resin layer, a decorative plate having a surface resin layer with high uniformity in thickness can be produced, and the resulting decorative plate has high surface smoothness, Has surface gloss.
Moreover, when the surface resin layer contains a fine filler, the wear resistance and surface hardness can be improved.
The decorative board of the present invention can be suitably used for, for example, furniture, office supplies, architectural interior materials and the like.

以下、本発明を実施例により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to examples.

1.第一の熱硬化性樹脂組成物ワニスの調製
メラミン(M)とホルムアルデヒド(F)との反応モル比(F/M)が1.7となるように配合し、これを反応温度95℃で、水混和度が16ml/5mlとなるまで反応させ、メラミン樹脂溶液を得た。このメラミン樹脂溶液中のメラミン樹脂固形分は50重量%、溶剤成分の比率は、メタノール:水=5:95であった。このメラミン樹脂溶液100重量部に対して、硬化促進剤として、日東理研工業社製・「キャタニットA」0.5重量部を添加混合して、第一の熱硬化性樹脂組成物ワニスA(以下、単に「樹脂ワニスA」という)を得た。
1. Preparation of first thermosetting resin composition varnish The reaction molar ratio (F / M) of melamine (M) and formaldehyde (F) is 1.7, and this is a reaction temperature of 95 ° C. It was made to react until water miscibility became 16 ml / 5ml, and the melamine resin solution was obtained. The melamine resin solid content in this melamine resin solution was 50% by weight, and the ratio of the solvent component was methanol: water = 5: 95. To 100 parts by weight of this melamine resin solution, 0.5 part by weight of “Catanit A” manufactured by Nitto Riken Kogyo Co., Ltd. was added and mixed as a curing accelerator, and the first thermosetting resin composition varnish A ( Hereinafter, simply “resin varnish A” was obtained.

2.第二の熱硬化性樹脂組成物ワニスの調製(1)
上記樹脂ワニスAと同様にして、第二の熱硬化性樹脂組成物ワニスB(以下、単に「樹脂ワニスB」という)を得た。
2. Preparation of second thermosetting resin composition varnish (1)
In the same manner as the resin varnish A, a second thermosetting resin composition varnish B 1 (hereinafter simply referred to as “resin varnish B 1 ”) was obtained.

3.第二の熱硬化性樹脂組成物ワニスの調製(2)
上記樹脂ワニスAの樹脂固形分100重量部に対して、微粒充填材として、扶桑化学社製・「コロイダルシリカ PL−1」(一次粒子の平均粒径15nm)10重量部(固形分換算値)を配合した。
これを、高速撹拌装置(エム・テクニック社製・「クレアミックス」)を用いて、回転数15000rpmで3分間撹拌処理し、第二の熱硬化性樹脂組成物ワニスB(以下、単に「樹脂ワニスB」という)を得た。
3. Preparation of second thermosetting resin composition varnish (2)
As a fine filler, 10 parts by weight (solid content converted value) of “Colloidal Silica PL-1” (average particle diameter of primary particles) of 100% by weight of resin varnish A resin solids Was formulated.
This was stirred for 3 minutes at 15000 rpm using a high-speed stirrer (M Technique Co., Ltd., “CLEAMIX”), and the second thermosetting resin composition varnish B 2 (hereinafter simply referred to as “resin”). to obtain a varnish B 2 "hereinafter).

3.第二の熱硬化性樹脂組成物ワニスの調製(3)
上記樹脂ワニスAの樹脂固形分100重量部に対して、微粒充填材として、扶桑化学社製・「コロイダルシリカ PL−3」(一次粒子の平均粒径35nm)10重量部(固形分換算値)を配合した。
これを、高速撹拌装置(エム・テクニック社製・「クレアミックス」)を用いて、回転数15000rpmで3分間撹拌処理し、第二の熱硬化性樹脂組成物ワニスB(以下、単に「樹脂ワニスB」という)を得た。
3. Preparation of second thermosetting resin composition varnish (3)
10 parts by weight (solid content conversion value) of “Colloidal silica PL-3” (average particle size of primary particles: 35 nm) manufactured by Fuso Chemical Co., Ltd. as a fine filler with respect to 100 parts by weight of resin solids of the resin varnish A Was formulated.
This was stirred for 3 minutes at a rotation speed of 15000 rpm using a high-speed stirrer (manufactured by M Technique Co., Ltd. “CLEAMIX”), and the second thermosetting resin composition varnish B 3 (hereinafter simply referred to as “resin”). to obtain a varnish B 3 "hereinafter).

4.化粧層用プリプレグの製造
4.1 実施例1
(1)樹脂含浸化粧紙の製造
米坪90g/mの白色チタン紙に、上記で得られた樹脂ワニスAを含浸させた後、熱風乾燥装置で乾燥させ、米坪190g/m、揮発分6重量%の樹脂含浸化粧紙を得た。(2)樹脂含浸化粧紙の予備加圧
上記で得られた樹脂含浸化粧紙を、厚さ1.6mmのステンレス製プレスプレート(鏡面仕上げ)にはさみ、平板プレス装置を用いて、常温下で、5MPaで30秒間加圧した。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、薄膜スプレー装置(アトマックス社製・「アトマックスノズル」)を用いて48g/m塗工し、135℃で100秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ22μmの樹脂層が形成された化粧層用プリプレグ1を得た。
4). Production of prepreg for decorative layer 4.1 Example 1
(1) Manufacture of resin-impregnated decorative paper After impregnating the white tanned paper of 90 g / m 2 with the resin varnish A obtained above, it is dried with a hot-air drying device, 190 g / m 2 , volatilization A 6% by weight resin impregnated decorative paper was obtained. (2) Pre-pressurization of resin-impregnated decorative paper The resin-impregnated decorative paper obtained above is sandwiched between stainless steel press plates (mirror finish) having a thickness of 1.6 mm, using a flat plate press device at room temperature, Pressurized at 5 MPa for 30 seconds.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 1 obtained above, the thin film spray device (manufactured by Atto Max Co., "Ath Max nozzle" ) 48 g / m 2 was applied using a 100 seconds at 135 ° C., then heated and dried for 40 seconds at 105 ° C., to obtain a decorative layer prepreg 1 on which a resin layer is formed thick 22μm the decorative surface It was.

4.2 実施例2
(1)樹脂含浸化粧紙の製造
実施例1と同様にして行った。
(2)樹脂含浸化粧紙の予備加圧
実施例1と同様にして行った。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、実施例1と同じ薄膜スプレー装置を用いて96g/m塗工し、135℃で150秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ45μmの樹脂層が形成された化粧層用プリプレグ2を得た。
4.2 Example 2
(1) Production of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(2) Pre-pressurization of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 1 obtained above, using the same thin film spray apparatus as in Example 1 96 g / m Two coatings were performed, followed by heating and drying at 135 ° C. for 150 seconds and then at 105 ° C. for 40 seconds to obtain a prepreg 2 for a decorative layer in which a resin layer having a thickness of 45 μm was formed on the decorative surface.

4.3 実施例3
(1)樹脂含浸化粧紙の製造
実施例1と同様にして行った。
(2)樹脂含浸化粧紙の予備加圧
実施例1と同様にして行った。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、実施例1と同じ薄膜スプレー装置を用いて48g/m塗工し、135℃で100秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ22μmの樹脂層が形成された化粧層用プリプレグ3を得た。
4.3 Example 3
(1) Production of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(2) Pre-pressurization of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 2 obtained above, using the same thin film spray apparatus as in Example 1 48 g / m Two coatings were performed, followed by heating and drying at 135 ° C. for 100 seconds and then at 105 ° C. for 40 seconds to obtain a prepreg 3 for a decorative layer in which a resin layer having a thickness of 22 μm was formed on the decorative surface.

4.4 実施例4
(1)樹脂含浸化粧紙の製造
実施例1と同様にして行った。
(2)樹脂含浸化粧紙の予備加圧
実施例1と同様にして行った。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、実施例1と同じ薄膜スプレー装置を用いて96g/m塗工し、135℃で150秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ45μmの樹脂層が形成された化粧層用プリプレグ4を得た。
4.4 Example 4
(1) Production of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(2) Pre-pressurization of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 2 obtained above, using the same thin film spray apparatus as in Example 1 96 g / m Two coatings were performed, followed by heating and drying at 135 ° C. for 150 seconds and then at 105 ° C. for 40 seconds to obtain a prepreg 4 for a decorative layer in which a resin layer having a thickness of 45 μm was formed on the decorative surface.

4.5 実施例5
(1)樹脂含浸化粧紙の製造
実施例1と同様にして行った。
(2)樹脂含浸化粧紙の予備加圧
実施例1と同様にして行った。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、実施例1と同じ薄膜スプレー装置を用いて48g/m塗工し、135℃で100秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ22μmの樹脂層が形成された化粧層用プリプレグ5を得た。
4.5 Example 5
(1) Production of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(2) Pre-pressurization of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 3 obtained above, using the same thin film spray apparatus as in Example 1 48 g / m Two coatings were performed, followed by heating and drying at 135 ° C. for 100 seconds and then at 105 ° C. for 40 seconds to obtain a prepreg 5 for a decorative layer in which a resin layer having a thickness of 22 μm was formed on the decorative surface.

4.6 実施例6
(1)樹脂含浸化粧紙の製造
実施例1と同様にして行った。
(2)樹脂含浸化粧紙の予備加圧
実施例1と同様にして行った。
(3)化粧層用プリプレグの製造
予備加圧した後の樹脂含浸化粧紙の化粧面側に、上記で得られた樹脂ワニスBを、実施例1と同じ薄膜スプレー装置を用いて96g/m塗工し、135℃で150秒間、次いで、105℃で40秒間加熱乾燥して、化粧面に厚さ45μmの樹脂層が形成された化粧層用プリプレグ6を得た。
4.6 Example 6
(1) Production of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(2) Pre-pressurization of resin-impregnated decorative paper The same procedure as in Example 1 was performed.
(3) the decorative surface of the resin impregnated decorative paper after pressure produced preheating the prepreg decorative layer, a resin varnish B 3 obtained above, using the same thin film spray apparatus as in Example 1 96 g / m Two coatings were performed, followed by heating and drying at 135 ° C. for 150 seconds and then at 105 ° C. for 40 seconds to obtain a prepreg 6 for a decorative layer in which a resin layer having a thickness of 45 μm was formed on the decorative surface.

5.芯材層用プリプレグの製造
坪量75g/m 、比重0.23g/cm 、有機バインダー量11重量%のガラス繊維不織布に、水酸化アルミニウム(昭和電工社製・「H−100C」、平均粒径100μm)50部、水酸化アルミニウム(昭和電工社製・「H−32」、平均粒径8μm)40部、水溶性レゾール型フェノール樹脂8部(固形分)、水及びメタノール20部からなる芯材層用樹脂組成物を調製した。
この芯材層用樹脂組成物を、ガラス繊維不織布の重量に対して、固形分換算で20重量倍塗工して、芯材層用プリプレグを得た。
5. Manufacture of prepreg for core material layer A glass fiber nonwoven fabric having a basis weight of 75 g / m 2 , a specific gravity of 0.23 g / cm 3 and an organic binder amount of 11% by weight, aluminum hydroxide (“H-100C” manufactured by Showa Denko KK, average 50 parts of particle size 100 μm), 40 parts of aluminum hydroxide (Showa Denko, “H-32”, average particle size 8 μm), 8 parts of water-soluble resol type phenolic resin (solid content), water and 20 parts of methanol. A resin composition for the core material layer was prepared.
This core material layer resin composition was coated 20 times in terms of solid content with respect to the weight of the glass fiber nonwoven fabric to obtain a core material layer prepreg.

6.化粧板の製造
6.1 実施例11
上記で得られた芯材層用プリプレグ4枚を積層し、その表裏両面側に、実施例1で得られた化粧層用プリプレグ1を1枚ずつ積層して、厚さ1.6mmのステンレス製プレスプレート(鏡面仕上げ)にはさみ、平板プレス装置により、140℃、8MPaの条件下で20分間加熱加圧成形し、厚さ約3mmの難燃タイプの化粧板を得た。
6). Production of decorative board 6.1 Example 11
Four core material layer prepregs obtained as described above are laminated, and the decorative layer prepregs 1 obtained in Example 1 are laminated one by one on both front and back sides, and the thickness is 1.6 mm. It was sandwiched between a press plate (mirror finish) and subjected to heat and pressure molding for 20 minutes under the conditions of 140 ° C. and 8 MPa using a flat plate press machine to obtain a flame retardant decorative plate having a thickness of about 3 mm.

6.2 実施例12
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例2で得られた化粧層用プリプレグ2を用いた以外は、実施例11と同様にして化粧板を得た。
6.2 Example 12
A decorative board was obtained in the same manner as in Example 11 except that the decorative layer prepreg 2 obtained in Example 2 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.3 実施例13
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例3で得られた化粧層用プリプレグ3を用いた以外は、実施例11と同様にして化粧板を得た。
6.3 Example 13
A decorative board was obtained in the same manner as in Example 11 except that the decorative layer prepreg 3 obtained in Example 3 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.4 実施例14
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例4で得られた化粧層用プリプレグ4を用いた以外は、実施例11と同様にして化粧板を得た。
6.4 Example 14
A decorative board was obtained in the same manner as in Example 11 except that the decorative layer prepreg 4 obtained in Example 4 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.5 実施例15
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例5で得られた化粧層用プリプレグ5を用いた以外は、実施例11と同様にして化粧板を得た。
6.5 Example 15
A decorative board was obtained in the same manner as in Example 11 except that the decorative layer prepreg 5 obtained in Example 5 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.6 実施例16
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例6で得られた化粧層用プリプレグ6を用いた以外は、実施例11と同様にして化粧板を得た。
6.6 Example 16
A decorative board was obtained in the same manner as in Example 11 except that the decorative layer prepreg 6 obtained in Example 6 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.7 比較例11
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例1で得られた樹脂含浸化粧紙を用いた以外は、実施例11と同様にして化粧板を得た。
6.7 Comparative Example 11
A decorative board was obtained in the same manner as in Example 11 except that the resin-impregnated decorative paper obtained in Example 1 was used instead of the decorative layer prepreg 1 obtained in Example 1.

6.8 比較例12
実施例1で得られた化粧層用プリプレグ1の代わりに、実施例1で得られた、樹脂含浸化粧紙を予備加圧したものを用いた以外は、実施例11と同様にして化粧板を得た。
6.8 Comparative Example 12
Instead of the decorative layer prepreg 1 obtained in Example 1, a decorative board was prepared in the same manner as in Example 11 except that the resin-impregnated decorative paper obtained in Example 1 was used. Obtained.

実施例1〜6で得られた化粧層用プリプレグ、実施例11〜16で得られた化粧板、及び、比較例11〜12で得られた化粧板の特性について、表1に示す。   The properties of the decorative layer prepregs obtained in Examples 1 to 6, the decorative plates obtained in Examples 11 to 16 and the decorative plates obtained in Comparative Examples 11 to 12 are shown in Table 1.

Figure 2006231709
Figure 2006231709

7.評価方法
(1)化粧層用プリプレグの樹脂層の厚み
樹脂含浸化粧紙と化粧層用プリプレグとの重量差(樹脂層を形成する前後の重量差)と、第二の熱硬化性樹脂組成物の固形分比重とから算出した。
7). Evaluation method (1) Thickness of resin layer of decorative layer prepreg Weight difference between resin-impregnated decorative paper and decorative layer prepreg (weight difference before and after forming resin layer) and second thermosetting resin composition It calculated from solid content specific gravity.

(2)化粧板の表面樹脂層の厚み
化粧板(1m×1m)を、大きさ200mm×200mmの試料25枚に裁断し、各試料の平面方向の略中心部の断面を顕微鏡で観察し、25箇所の厚みを測定し、この平均値とR(最大値−最小値)を算出した。
(2) The thickness of the surface resin layer of the decorative plate The decorative plate (1 m × 1 m) is cut into 25 samples having a size of 200 mm × 200 mm, and the cross section of the substantially central portion in the planar direction of each sample is observed with a microscope. The thickness at 25 locations was measured, and the average value and R (maximum value−minimum value) were calculated.

(3)表面光沢性
化粧板表面について、村上色彩技術研究所社製・像鮮明度光沢計「DGM−30」を用いて、像鮮明度を測定した。測定条件は、光の入射角度30度、受光角度30度で実施した。この測定値は、正反射軸の反射光量(100)に対する、軸に対して±0.3度の範囲内での計測光量の比率を示したものであり、反射光の拡散度により表面平滑度、表面光沢性を示す指標である。
(3) Surface Glossiness On the surface of the decorative board, image sharpness was measured using an image sharpness gloss meter “DGM-30” manufactured by Murakami Color Research Laboratory. The measurement conditions were a light incident angle of 30 degrees and a light receiving angle of 30 degrees. This measured value indicates the ratio of the measured light amount within a range of ± 0.3 degrees with respect to the axis with respect to the reflected light amount (100) of the regular reflection axis, and the surface smoothness is determined by the diffusivity of the reflected light. It is an index indicating surface glossiness.

(4)化粧板の表面粗さ
化粧板表面について、ミツトヨ社製・3D精密形状測定装置を用い、Raを測定した。
(4) Surface roughness of decorative plate Ra was measured on the decorative plate surface using a 3D precision shape measuring device manufactured by Mitutoyo Corporation.

(5)化粧板の耐摩耗性
JIS K 6902(熱硬化性樹脂化粧板試験方法)に準拠して、化粧紙の印刷色の層が最初に切り取られたときの回転数を測定した。
(5) Wear resistance of decorative board According to JIS K 6902 (thermosetting resin decorative board test method), the number of rotations when the printed color layer of the decorative paper was first cut was measured.

(6)化粧板の表面硬度
JIS K 6902に準拠して、ダイヤモンド針を用いて化粧板の引っ掻き硬さを測定した。
試験条件は、ダイヤモンド針に与える荷重を10gから開始し、この荷重を10gずつ増やしていき、引っ掻きキズが確認された直前のg数で示した。
(6) Surface hardness of decorative board Based on JIS K 6902, the scratch hardness of the decorative board was measured using the diamond needle.
The test conditions were shown by the number of grams immediately before the scratches were confirmed, starting with 10 g of the load applied to the diamond needle, increasing this load by 10 g.

実施例1〜6は、本発明の化粧層用プリプレグである。
そして、実施例11〜16は、上記本発明の化粧層用プリプレグを用いた化粧板であり、比較例11、比較例12と比較して、表面平滑性に優れ、高い表面光沢度を有する化粧板とすることができた。
特に、実施例13〜16は、化粧板の表面樹脂層中に微粒充填材が配合されており、耐磨耗特性や表面硬度についても大きく向上させることができた。
Examples 1 to 6 are prepregs for a decorative layer of the present invention.
Examples 11 to 16 are decorative plates using the above-described decorative layer prepreg of the present invention. Compared with Comparative Examples 11 and 12, the cosmetics have excellent surface smoothness and high surface gloss. Could be a board.
In particular, in Examples 13 to 16, a fine filler was blended in the surface resin layer of the decorative board, and the wear resistance and surface hardness could be greatly improved.

本発明によれば、本発明の製造方法により得られた化粧層用プリプレグを用いて化粧板を製造することにより、従来の化粧板としての基本的特性を損なうことなく、表面平滑性に優れ、高い表面光沢度を有する化粧板を製造することができる。
本発明の化粧板は、例えば、例えば、家具、事務用品、建築用内装材などに好適に用いることができるものである。
According to the present invention, by producing a decorative board using the prepreg for decorative layer obtained by the manufacturing method of the present invention, the surface smoothness is excellent without impairing the basic properties as a conventional decorative board, A decorative board having a high surface glossiness can be produced.
The decorative board of the present invention can be suitably used for, for example, furniture, office supplies, architectural interior materials, and the like.

Claims (9)

化粧板に用いられる化粧層用プリプレグの製造方法であって、
(a)化粧層用紙基材に第一の熱硬化性樹脂組成物を含浸、乾燥させ、樹脂含浸化粧紙を製造する工程、
(b)前記樹脂含浸化粧紙を予備加圧する工程、及び、
(c)前記予備加圧後の樹脂含浸化粧紙の化粧面側表面に、第二の熱硬化性樹脂組成物により樹脂層を形成する工程、
を有することを特徴とする、化粧層用プリプレグの製造方法。
A method for producing a prepreg for a decorative layer used for a decorative board,
(A) impregnating the first thermosetting resin composition on the decorative layer paper base material and drying it to produce a resin-impregnated decorative paper;
(B) pre-pressurizing the resin-impregnated decorative paper, and
(C) forming a resin layer with a second thermosetting resin composition on the decorative surface side surface of the resin-impregnated decorative paper after the pre-pressurization;
The manufacturing method of the prepreg for decorative layers characterized by having.
前記第一の熱硬化性樹脂組成物は、熱硬化性樹脂としてメラミン樹脂を含有するものである請求項1に記載の化粧層用プリプレグの製造方法。 The method for producing a prepreg for a decorative layer according to claim 1, wherein the first thermosetting resin composition contains a melamine resin as a thermosetting resin. 前記第二の熱硬化性樹脂組成物は、熱硬化性樹脂とともに、一次粒子の平均粒径が5〜500nmである無機充填材を含有するものである請求項1又は2に記載の化粧層用プリプレグの製造方法。 The said 2nd thermosetting resin composition contains the inorganic filler whose average particle diameter of a primary particle is 5-500 nm with a thermosetting resin. For cosmetic layers of Claim 1 or 2 A method for producing a prepreg. 前記無機充填材は、シリカを含有するものである請求項3に記載の化粧層用プリプレグの製造方法。 The method for producing a prepreg for a decorative layer according to claim 3, wherein the inorganic filler contains silica. 前記第二の熱硬化性樹脂組成物は、熱硬化性樹脂としてメラミン樹脂を含有するものである請求項1ないし4のいずれかに記載の化粧層用プリプレグの製造方法。 The method for producing a prepreg for a decorative layer according to any one of claims 1 to 4, wherein the second thermosetting resin composition contains a melamine resin as a thermosetting resin. 前記(b)工程において予備加圧する際の圧力は、3〜20MPaである請求項1ないし5のいずれかに記載の化粧層用プリプレグの製造方法。 The method for producing a prepreg for a decorative layer according to any one of claims 1 to 5, wherein a pressure when pre-pressurizing in the step (b) is 3 to 20 MPa. 前記(c)工程において形成される樹脂層の厚みは、5〜50μmである請求項1ないし6のいずれかに記載の化粧層用プリプレグの製造方法。 The method for producing a prepreg for a decorative layer according to any one of claims 1 to 6, wherein the resin layer formed in the step (c) has a thickness of 5 to 50 µm. 請求項1ないし7のいずれかに記載の製造方法で得られた化粧層用プリプレグを、芯材層用プリプレグを含む化粧板用材料の表面側に積層し、これを加熱加圧成形してなることを特徴とする化粧板。 The decorative layer prepreg obtained by the production method according to any one of claims 1 to 7 is laminated on the surface side of a decorative plate material containing the core layer prepreg, and is formed by heating and pressing. A decorative board characterized by that. 化粧層表面に5〜40μmの表面樹脂層を有する請求項8に記載の化粧板。
The decorative board according to claim 8, which has a surface resin layer of 5 to 40 µm on the surface of the decorative layer.
JP2005049823A 2005-02-25 2005-02-25 Method for producing prepreg for decorative layer and decorative panel Pending JP2006231709A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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JP2009113274A (en) * 2007-11-05 2009-05-28 Toppan Printing Co Ltd Decorative sheet

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JPS605188B2 (en) * 1980-01-31 1985-02-08 住友ベークライト株式会社 Thermosetting resin decorative board with high wear resistance
JPS63190092A (en) * 1987-01-27 1988-08-05 株式会社 興人 Base paper for decorative sheet
JPH09262956A (en) * 1996-03-28 1997-10-07 Daiken Trade & Ind Co Ltd Decorative plate and its manufacture
JP2002264287A (en) * 2001-03-12 2002-09-18 Sumitomo Bakelite Co Ltd High-pressure decorative sheet of melamine resin
JP2004174951A (en) * 2002-11-28 2004-06-24 Aica Kogyo Co Ltd Bright decorative board

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605188B2 (en) * 1980-01-31 1985-02-08 住友ベークライト株式会社 Thermosetting resin decorative board with high wear resistance
JPS63190092A (en) * 1987-01-27 1988-08-05 株式会社 興人 Base paper for decorative sheet
JPH09262956A (en) * 1996-03-28 1997-10-07 Daiken Trade & Ind Co Ltd Decorative plate and its manufacture
JP2002264287A (en) * 2001-03-12 2002-09-18 Sumitomo Bakelite Co Ltd High-pressure decorative sheet of melamine resin
JP2004174951A (en) * 2002-11-28 2004-06-24 Aica Kogyo Co Ltd Bright decorative board

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009113274A (en) * 2007-11-05 2009-05-28 Toppan Printing Co Ltd Decorative sheet

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