JP2723777B2 - Inorganic plate - Google Patents
Inorganic plateInfo
- Publication number
- JP2723777B2 JP2723777B2 JP5116933A JP11693393A JP2723777B2 JP 2723777 B2 JP2723777 B2 JP 2723777B2 JP 5116933 A JP5116933 A JP 5116933A JP 11693393 A JP11693393 A JP 11693393A JP 2723777 B2 JP2723777 B2 JP 2723777B2
- Authority
- JP
- Japan
- Prior art keywords
- inorganic
- middle layer
- surface layer
- binder
- inorganic plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Finishing Walls (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軽量で乾湿による寸法
変化率の小さい無機質板状体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic plate having a small dimensional change due to lightness and dryness.
【０００２】[0002]
【従来の技術】従来、防火性に優れた下地材としては、
例えば、石膏ボード，珪酸カルシウム板等の無機質板状
体がある。これらは強度，表面硬度，ビス止め性におい
て十分な性能を有しているが、比重が大きいので、大版
になると重く、運搬性，施工性に問題がある。そこで、
軽量な無機質板状体を得るため、例えば、無機質発泡体
を主体とし、かつ、スターチを結合剤とする中層部の表
裏面に、鉱物質繊維および無機粉状体を主体とする表層
部をそれぞれ積層し、熱圧一体化した三層構造の無機質
板状体が提案されている。このように、中層部の結合剤
としてスターチが使用されるのは、前記スターチは一般
に粉体で添加でき、均一に分散させやすいだけでなく、
水分および熱で糊化しやすく、少量で所望の接着力が得
られるため、不燃材，準不燃材の製造に適しているから
である。2. Description of the Related Art Conventionally, as a base material having excellent fire resistance,
For example, there are inorganic plates such as gypsum board and calcium silicate plate. These have sufficient performance in strength, surface hardness, and screwing properties, but have a large specific gravity, so that a large version is heavy and has problems in transportability and workability. Therefore,
In order to obtain a lightweight inorganic plate-shaped body, for example, the surface layer mainly composed of mineral foam and inorganic powder, respectively, on the front and back surfaces of the middle layer part mainly composed of inorganic foam and starch. There has been proposed an inorganic plate-like body having a three-layer structure which is laminated and integrated by heat and pressure. As described above, starch is used as a binder in the middle layer because the starch can be generally added in a powder form and is not only easily dispersed uniformly,
This is because it is easily gelatinized by moisture and heat, and a desired adhesive strength can be obtained with a small amount, so that it is suitable for the production of noncombustible materials and semi-combustible materials.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述の
ような無機質板状体は、中層部が圧縮して形成されてい
るので、吸湿によってスターチが軟化した場合に、表層
部よりも中層部の寸法変化が大きい。これは後述する実
施例の比較例２において表層部の寸法変化率が０．０４
％であるのに対し、中層部のそれが０．２％であること
からも明らかである。しかも、中層部に比して表層部は
薄く、表層部が寸法変化率の小さいものであっても、表
層部の結合剤も軟化しているので、表層部は中層部の寸
法変化を抑制できない。このため、前記無機質板状体全
体の寸法変化率は、後述する実施例の比較例１から明ら
かなように０．１５％と大きく、これは石膏ボード，珪
酸カルシウム板等の約２倍の大きさである。この結果、
前述のような無機質板状体を施工すると、施工後に目隙
きや端部の突き上げ等が生じるという問題点がある。However, in the above-described inorganic plate-like body, since the middle layer is formed by compression, when the starch is softened by moisture absorption, the size of the middle layer is larger than that of the surface layer. The change is large. This is because the dimensional change rate of the surface layer portion was 0.04 in Comparative Example 2 of Examples described later.
%, Whereas that of the middle layer is 0.2%. Moreover, the surface layer portion is thinner than the middle layer portion, and even if the surface layer portion has a small dimensional change rate, the binder of the surface layer portion is also softened, so that the surface layer portion cannot suppress the dimensional change of the middle layer portion. . For this reason, the dimensional change rate of the entire inorganic plate-like body is as large as 0.15%, as is apparent from Comparative Example 1 of Examples described later, which is about twice as large as that of a gypsum board, a calcium silicate plate or the like. That's it. As a result,
When the above-mentioned inorganic plate-like body is constructed, there is a problem that gaps and end pushing-up occur after the construction.
【０００４】本発明は、前記問題点に鑑み、軽量で寸法
安定性の良い無機質板状体を提供することを目的とす
る。[0004] In view of the above problems, an object of the present invention is to provide an inorganic plate-shaped body which is lightweight and has good dimensional stability.
【０００５】[0005]
【課題を解決するための手段】本発明にかかる無機質板
状体は、前記目的を達成するため、無機発泡体および結
合剤を主体とする無機質層状体からなる中層部の表裏面
と、鉱物質繊維，無機粉状体および結合剤を主体とする
無機質層状体からなる表層部との界面に、耐水性を有す
る合成樹脂剤を固形分換算で半分以上含んでいる接着性
物質を介在させて積層一体化した構成としたものであ
る。例えば、三層構造の無機質板状体としては、図１に
示すように、無機発泡体を主体とし、かつ、適量の結合
剤を添加してなる中層部１の表裏面と、鉱物質繊維およ
び無機粉状体を主体とし、かつ、適量の結合剤を添加し
てなる表層部２，３との界面に接着性物質を介在させた
構成としたものである。前記接着性物質は、耐水性を有
する合成樹脂剤を固形分換算で半分以上含んでいるもの
であってもよく、その塗布量は、固形分換算で２０〜５
０ｇ/ｍ2であることが好ましい。In order to achieve the above-mentioned object, an inorganic plate-like body according to the present invention comprises: an inorganic layered body mainly composed of an inorganic foam and a binder; Laminated with an adhesive substance containing more than half of a water-resistant synthetic resin agent in solid content at the interface with the surface layer composed of inorganic layered material mainly composed of fiber, inorganic powder and binder. This is an integrated configuration. For example, as shown in FIG. 1, as the inorganic plate-like body having a three-layer structure, as shown in FIG. 1, the front and back surfaces of the middle layer part 1 mainly composed of an inorganic foam and having an appropriate amount of a binder added thereto, and mineral fiber and It has a configuration in which an adhesive substance is interposed at the interface with the surface layers 2 and 3 which is mainly composed of an inorganic powder and to which an appropriate amount of a binder is added. The adhesive substance may contain at least half of a water-resistant synthetic resin agent in terms of solid content, and the coating amount is 20 to 5 in terms of solid content.
It is preferably 0 g / m 2 .
【０００６】中層部を形成する無機発泡体は圧縮強度を
維持しつつ、軽量化するために添加されるものであり、
例えば、パーライト、シラス発泡体、シリカフラワー、
ガラス発泡体等があり、これらは単独で、あるいは、２
種以上組み合わせて使用できる。そして、中層部におけ
る無機発泡体の添加量は、大略、中層部全体の６５〜９
５重量％とするのが好ましい。The inorganic foam forming the middle layer is added to reduce the weight while maintaining the compressive strength.
For example, perlite, shirasu foam, silica flower,
There are glass foams and the like.
More than one species can be used in combination. And the addition amount of the inorganic foam in the middle layer part is roughly 65 to 9 of the whole middle layer part.
It is preferably 5% by weight.
【０００７】中層部には必要に応じて無機発泡体同士を
連結するために繊維状物が添加される。繊維状物として
は、例えば、ロックウール，スラグウール等の鉱物質繊
維、ポリプロピレン等の合成樹脂繊維の他、パルプ等が
用いられることがある。[0007] A fibrous material is added to the middle layer as needed to connect the inorganic foams. As the fibrous material, for example, mineral fibers such as rock wool and slag wool, synthetic resin fibers such as polypropylene, and pulp may be used.
【０００８】中層部を形成する結合剤は、前記無機発泡
体を結合一体化するためのものであり、例えば、ポリビ
ニールアルコール樹脂、フェノール樹脂等の合成樹脂、
あるいは、スターチ等が挙げられ、これらは単独で、あ
るいは、２種以上組み合わせて使用できる。[0008] The binder forming the middle layer portion is for binding and integrating the inorganic foam, and is, for example, a synthetic resin such as a polyvinyl alcohol resin or a phenol resin.
Alternatively, starch and the like can be mentioned, and these can be used alone or in combination of two or more.
【０００９】なお、一般に、結合剤が多ければ多い程、
曲げ強度は向上するが、準不燃材としての無機質板状体
を得るためには、中層部における有機成分の総量を結合
剤を含めて１５重量％以下にする必要がある。また、不
燃材としての無機質板状体を得るためには、有機成分の
総量を結合剤を含めて７重量％以下にする必要がある。Generally, the more the binder, the more
Although the flexural strength is improved, the total amount of organic components in the middle layer, including the binder, needs to be 15% by weight or less in order to obtain an inorganic plate-like body as a semi-combustible material. In addition, in order to obtain an inorganic plate as an incombustible material, it is necessary to make the total amount of organic components including the binder 7% by weight or less.
【００１０】表層部を形成する鉱物質繊維としては、例
えば、ロックウール、スラグウール、ミネラルウール、
および、ガラス繊維などを挙げることができ、これらは
単独で、あるいは、２種以上組み合わせて使用できる。
そして、表層部における鉱物質繊維の添加量は、表層部
全体の２０〜６０重量％とするのが好ましい。The mineral fibers forming the surface layer include, for example, rock wool, slag wool, mineral wool,
And glass fiber can be mentioned, and these can be used alone or in combination of two or more kinds.
The amount of the mineral fibers added to the surface layer is preferably 20 to 60% by weight of the entire surface layer.
【００１１】表層部を形成する無機粉状体は、防火性を
維持しつつ、硬度を高めてネジ止め性能を高めるための
ものであり、例えば、炭酸カルシウム、硅砂、マイクロ
シリカ、スラグ、水酸化アルミニウム等を挙げることが
できる。そして、表層部における無機粉状体の添加量
は、表層部全体の４０〜７０重量％とするのが好まし
い。The inorganic powder forming the surface layer is used to increase the hardness and the screwing performance while maintaining the fire resistance. For example, calcium carbonate, silica sand, micro silica, slag, hydroxide Aluminum and the like can be given. The amount of the inorganic powder in the surface layer is preferably 40 to 70% by weight of the entire surface layer.
【００１２】また、表層部には、水性スラリーから抄造
する為に一般には若干量のサイズ剤や、凝集剤が添加さ
れる。[0012] In addition, a slight amount of a sizing agent or a flocculant is generally added to the surface layer for paper-making from an aqueous slurry.
【００１３】表層部を形成するための結合剤の材質，添
加量は、前述の中層部と同様であるので、説明を省略す
る。The material and the amount of the binder for forming the surface layer are the same as those of the above-mentioned middle layer, and the description is omitted.
【００１４】接着性物質は表層部と中層部との界面同士
の接着力を高め、吸湿によって中層部の結合剤が軟化し
ても、その寸法変化を抑制し、無機質板状体の寸法安定
性を高めるためのものであり、特に、耐水性を有する合
成樹脂剤を固形分換算で半分以上含むことが好ましい。
前記合成樹脂剤が表層部界面部分の軟化を防止するとと
もに、その被膜で湿気を遮断し、中層部に湿気が侵入す
るのを防止することにより、寸法変化率を小さくできる
からである。なお、耐水性を有する合成樹脂剤として
は、例えば、エポキシ樹脂、アクリル−スチレン樹脂、
フェノール樹脂等が挙げられる。また、表層部と中層部
との界面に供給される接着性物質は、固形分換算で２０
〜５０ｇ/ｍ2であることが好ましい。２０ｇ/ｍ2未満で
あると、寸法変化率を十分に抑制することができず、５
０ｇ/ｍ2を越えると、有機成分の総量が多くなり、不燃
材，準不燃材の規格を満足しないからである。さらに、
表層部および中層部の界面に接着性物質を介在させる方
法としては、例えば、吹き付けや塗布による方法であっ
てもよく、シート状に形成した接着性物質を載置して介
在させてもよい。The adhesive substance enhances the adhesive force between the interface between the surface layer and the middle layer, suppresses the dimensional change of the binder in the middle layer even if the binder in the middle layer softens due to moisture absorption, and reduces the dimensional stability of the inorganic plate. In particular, it is preferable that a synthetic resin agent having water resistance is contained at least half in terms of solid content.
The reason for this is that the synthetic resin agent prevents the softening of the interface portion of the surface layer portion, blocks the moisture with the coating, and prevents the moisture from entering the middle layer portion, whereby the dimensional change rate can be reduced. In addition, as a synthetic resin agent having water resistance, for example, epoxy resin, acrylic-styrene resin,
Phenol resins and the like can be mentioned. The adhesive substance supplied to the interface between the surface layer portion and the middle layer portion has a solid content of 20%.
Preferably it is ５０50 g / m 2 . If it is less than 20 g / m 2 , the dimensional change rate cannot be sufficiently suppressed, and
If it exceeds 0 g / m 2 , the total amount of organic components increases, and the standards for noncombustible materials and semi-combustible materials are not satisfied. further,
As a method of interposing an adhesive substance at the interface between the surface layer portion and the middle layer portion, for example, a method of spraying or coating may be used, or an adhesive substance formed in a sheet shape may be placed and interposed.
【００１５】次に、本発明にかかる無機質板状体の製造
方法の一例について説明する。まず、鉱物質繊維、無機
粉状体および結合剤を清水中に適宜投入，撹拌してスラ
リーを得、これを抄造機に導いて下方表層部となる湿潤
無機マットを抄造し、得られた湿潤無機マットの上面に
接着性物質を吹き付ける。一方、無機発泡体および適量
の結合剤を清水を噴霧しながら混合して混合物を得る。
そして、この混合物を前記湿潤無機マットの上面に均一
に散布，堆積して積層する。ついで、前述と同様に処理
して得た上方表層部となる他の湿潤無機マットの下面に
接着性物質を吹き付け、この湿潤無機マットを散布，堆
積した前記混合物に重ねて積層物を得、これを所定の温
度，熱で熱圧して一体化する。Next, an example of the method for producing an inorganic plate-like body according to the present invention will be described. First, a mineral fiber, an inorganic powder, and a binder are appropriately charged and stirred into fresh water to obtain a slurry, which is guided to a paper machine to form a wet inorganic mat to be a lower surface layer, and the obtained wet mat is obtained. Spray the adhesive on the top surface of the inorganic mat. On the other hand, an inorganic foam and an appropriate amount of a binder are mixed while spraying fresh water to obtain a mixture.
Then, the mixture is uniformly dispersed, deposited and laminated on the upper surface of the wet inorganic mat. Then, an adhesive substance is sprayed on the lower surface of another wet inorganic mat to be the upper surface layer obtained by treating in the same manner as described above, and the wet inorganic mat is sprayed and laminated on the deposited mixture to obtain a laminate. Are pressed and integrated at a predetermined temperature and heat.
【００１６】[0016]
【作用】したがって、本発明によれば、無機質層状体間
の界面が接着性物質を介して接着一体化されることにな
る。Therefore, according to the present invention, the interface between the inorganic layered bodies is bonded and integrated via the adhesive substance.
【００１７】[0017]
【実施例】以下、本発明にかかる実施例について説明す
る。 （実施例） 鉱物質繊維としてロックウール４０重量部、無機粉状体
として炭酸カルシウム５０重量部、水酸化アルミニウム
５重量部、結合剤として粉末フェノールおよびスターチ
の混合物５重量部、若干量の撥水剤，凝集剤を清水中に
投入，撹拌して濃度２重量％のスラリーを得、これを長
網式抄造機で抄造して上方，下方表層部となる厚さ３ｍ
ｍの湿潤無機マットを得た。Embodiments of the present invention will be described below. (Example) 40 parts by weight of rock wool as mineral fiber, 50 parts by weight of calcium carbonate as inorganic powder, 5 parts by weight of aluminum hydroxide, 5 parts by weight of a mixture of powdered phenol and starch as a binder, and a small amount of water repellency A slurry and a flocculant are put into fresh water and stirred to obtain a slurry having a concentration of 2% by weight, and the slurry is formed with a fourdrinier machine to form a 3 m thick upper and lower surface layer.
m wet inorganic mat was obtained.
【００１８】一方、無機発泡体としてパーライト４８重
量部、シラス発泡体４０重量部、無機粉状体として水酸
化アルミニウム５重量部、結合剤としてスターチおよび
粉末フェノールの混合物７重量部を、４０重量部の清水
の噴霧下で均一に混合し、中層部用混合物を得た。On the other hand, 48 parts by weight of perlite as an inorganic foam, 40 parts by weight of shirasu foam, 5 parts by weight of aluminum hydroxide as an inorganic powder, 7 parts by weight of a mixture of starch and powdered phenol as a binder, 40 parts by weight Were mixed uniformly under spraying of fresh water to obtain a mixture for the middle layer.
【００１９】そして、下面表層部となる湿潤無機マット
の上面に１０重量％のエポキシ樹脂溶液を固形分換算で
３０ｇ/ｍ2となるように吹き付け、ついで、前記中層部
用混合物を厚さ２８ｍｍとなるように均一に散布，堆積
して積層する。一方、上方表層部となる湿潤無機マット
の下面に前述のエポキシ樹脂溶液を同一条件で吹き付け
た後、これを散布，堆積した前記中層部用混合物の表面
に重ねて厚さ３４ｍｍの積層物を得た。そして、この積
層物を温度１８０℃の熱圧プレスで厚さ９ｍｍまで圧締
し、得られた無機質板状体を温度１８０℃のドライヤー
で乾燥して無機質板状体を得、これをサンプルとした。Then, an epoxy resin solution of 10% by weight is sprayed on the upper surface of the wet inorganic mat to be the surface layer of the lower surface so as to have a solid content of 30 g / m 2, and then the mixture for the middle layer has a thickness of 28 mm. Spray, deposit, and stack evenly as much as possible. On the other hand, the above-mentioned epoxy resin solution was sprayed on the lower surface of the wet inorganic mat as the upper surface layer under the same conditions, and then sprayed and superimposed on the surface of the deposited middle layer mixture to obtain a laminate having a thickness of 34 mm. Was. Then, the laminate was pressed with a hot press at a temperature of 180 ° C. to a thickness of 9 mm, and the obtained inorganic plate was dried with a dryer at a temperature of 180 ° C. to obtain an inorganic plate. did.
【００２０】（比較例１） エポキシ樹脂溶液を湿潤無機マットに吹き付けない点を
除き、他は前述の実施例と同様に処理して得た無機質板
状体をサンプルとした。(Comparative Example 1) An inorganic plate-like body obtained by treating in the same manner as in the above-mentioned Example except that the epoxy resin solution was not sprayed on the wet inorganic mat was used as a sample.
【００２１】（比較例２） 熱圧プレスまでの工程は比較例１と同様に処理し、ドラ
イヤーで乾燥する前に中層部から表層部を剥離して分解
した後、温度１８０のドライヤーで９０分間の乾燥を行
って得た無機質板状体をサンプルとした。(Comparative Example 2) The process up to the hot press was performed in the same manner as in Comparative Example 1. Before drying with a dryer, the surface layer was separated from the middle layer and decomposed, and then dried with a dryer at a temperature of 180 for 90 minutes. Was dried to obtain an inorganic plate-like body as a sample.
【００２２】前記実施例および比較例１，２で得た各サ
ンプルを温度４５℃で湿度１０％の雰囲気中に２４時間
放置した後、温度３０℃で湿度９０％の雰囲気中に２４
時間放置して寸法変化率を測定し、以下の結果を得た。 Each of the samples obtained in the above Examples and Comparative Examples 1 and 2 was left in an atmosphere at a temperature of 45 ° C. and a humidity of 10% for 24 hours.
After standing for a time, the dimensional change rate was measured, and the following results were obtained.
【００２３】以上の測定結果から明らかなように、比較
例２にかかる表層部の寸法変化率が０．０４％であり、
その中層部の寸法変化率が０．２０％であることから、
吸湿時における中層部の寸法変化率が相対的に極めて大
きく、比較例１もこれによって比較的大きな寸法変化率
を示すことがわかった。このように、比較例１の寸法変
化率が大きいのは、中層部の寸法変化率が大きく、か
つ、中層部の厚さが表層部の厚さよりも大きいので、表
層部が中層部の寸法変化を十分に抑制できないためであ
ると考えられる。As is clear from the above measurement results, the dimensional change of the surface layer according to Comparative Example 2 was 0.04%,
Since the dimensional change rate of the middle layer is 0.20%,
It was found that the dimensional change rate of the middle layer portion during moisture absorption was relatively extremely large, and Comparative Example 1 also showed a relatively large dimensional change rate. As described above, the dimensional change rate of Comparative Example 1 is large because the dimensional change rate of the middle layer portion is large and the thickness of the middle layer portion is larger than the thickness of the surface layer portion. It is thought that this is because it is not possible to sufficiently suppress the
【００２４】これに対し、実施例の寸法変化率は０．０
７％であるが、この値は下地材として広く使用されてい
る石膏ボードとほぼ同等であり、実用上の問題はない。
このように実施例の寸法変化率が比較例よりも小さいの
は、中層部と各表層部との界面に耐水性の合成樹脂剤を
介在させてあるので、耐水性の合成樹脂剤が表層部界面
部分の軟化を防止して引っ張り強さを高めるとともに、
その被膜が湿気を遮断して中層部に湿気が侵入するのを
防止し、中層部の軟化を抑制するためであると考えられ
る。On the other hand, the dimensional change rate of the embodiment is 0.0
Although it is 7%, this value is almost equivalent to gypsum board widely used as a base material, and there is no practical problem.
As described above, the dimensional change rate of the example is smaller than that of the comparative example because a water-resistant synthetic resin agent is interposed at the interface between the middle layer and each surface layer. In addition to preventing softening of the interface part and increasing tensile strength,
This is presumably because the film blocks moisture and prevents moisture from entering the middle layer, thereby suppressing softening of the middle layer.
【００２５】さらに、実施例および比較例１に対して各
種試験を行い、以下の測定結果を得た。 Further, various tests were performed on the example and comparative example 1, and the following measurement results were obtained.
【００２６】なお、前記試験結果は、下記の方式によっ
て得られたものである。 曲げ強度：ＪＩＳ Ａ５９０７−１９７７に基づく。 吸水時の 曲げ強度：水中に２４時間浸漬した後のサンプルに対
し、 ＪＩＳ Ａ５９０７−１９７７に準じて行った。 表面硬度：ＪＩＳ ＨＡＲＤＮＥＳＳ ＴＥＳＴＥＲに
基づく。 ビス貫通力：ＪＩＳ Ａ５９１０に準じた試験方法に基
づく。The test results were obtained by the following method. Flexural strength: based on JIS A5907-1977. Flexural strength at the time of water absorption: The sample was immersed in water for 24 hours, and was subjected to JIS A5907-1977. Surface hardness: Based on JIS HARDNESS TESTER. Screw penetration force: Based on a test method according to JIS A5910.
【００２７】以上の測定結果から明らかなように、実施
例は比較例１と同一の比重であるにもかかわらず、曲げ
強度，表面硬度等において優れていることがわかる。特
に、吸水時における実施例の曲げ強度は比較例の１．４
倍である。これは、中層部と表層部との界面に接着性物
質として耐水性のあるエポキシ樹脂溶液を介在させたこ
とによるものであると考えられる。そして、実施例にか
かる無機質板状体は市販の石膏ボード，珪酸カルシウム
板よりも軽量であり、かつ、ほぼ同等の寸法安定性を有
していることがわかった。As is apparent from the above measurement results, the example has excellent bending strength, surface hardness and the like, although it has the same specific gravity as that of the comparative example 1. In particular, the bending strength of the example at the time of water absorption was 1.4 in the comparative example.
It is twice. This is thought to be due to the interposition of a water-resistant epoxy resin solution as an adhesive substance at the interface between the middle layer and the surface layer. And it turned out that the inorganic plate-shaped body concerning an Example is lighter than a commercial gypsum board and a calcium silicate board, and has substantially the same dimensional stability.
【００２８】[0028]
【発明の効果】以上の説明から明らかなように、本発明
にかかる無機質板状体によれば、中層部の表裏面と表層
部との界面に耐水性合成樹脂剤からなる接着性物質が、
両者を強力に接着一体化する。このため、耐水性合成樹
脂剤が表層部の界面部分を強化して引っ張り強さを高め
る。この結果、中層部の伸縮が抑制され、寸法安定性が
向上する。また、前記接着性物質が耐水性合成樹脂剤を
含んでいるので、前記樹脂被膜によって湿気が遮断さ
れ、中間に位置する無機質層状体の寸法変化が小さくな
る。このため、無機質板状体全体の寸法変化がより一層
小さくなり、水分に対する寸法安定性が良くなるという
効果がある。As is clear from the above description, according to the inorganic plate-shaped body of the present invention, the adhesive substance comprising the water-resistant synthetic resin is provided at the interface between the front and back surfaces of the middle layer and the surface layer.
Both are strongly bonded and integrated. For this reason, the water-resistant synthetic resin agent strengthens the interface portion of the surface layer portion and increases the tensile strength. As a result, expansion and contraction of the middle layer portion is suppressed, and dimensional stability is improved. Further, since the adhesive substance contains a water-resistant synthetic resin agent, moisture is blocked by the resin film, and the dimensional change of the intermediate inorganic layered body is reduced. For this reason, there is an effect that the dimensional change of the entire inorganic plate-shaped body is further reduced, and the dimensional stability against moisture is improved.
【図１】 本発明にかかる無機質板状体の斜視図であ
る。FIG. 1 is a perspective view of an inorganic plate-shaped body according to the present invention.
１…中層部、２，３…表層部。 1 ... middle part, 2, 3 ... surface part.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭51−44118（ＪＰ，Ａ) 特公 昭57−53307（ＪＰ，Ｂ２) 特公 昭57−15068（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-44118 (JP, A) JP-B-57-53307 (JP, B2) JP-B-57-15068 (JP, B2)
Claims (2)
機質層状体からなる中層部の表裏面と、鉱物質繊維，無
機粉状体および結合剤を主体とする無機質層状体からな
る表層部との界面に、耐水性を有する合成樹脂剤を固形
分換算で半分以上含んでいる接着性物質を介在させて積
層一体化したことを特徴とする無機質板状体。1. A front and back surface of a middle layer portion composed mainly of an inorganic foam and a binder, and a surface layer portion composed mainly of a mineral fiber, an inorganic powder and a binder. An inorganic plate-like body characterized in that the interface is laminated and integrated at the interface with an adhesive substance containing at least half of a water-resistant synthetic resin agent in terms of solid content.
で２０〜５０ｇ/ｍ2であることを特徴とする請求項１記
載の無機質板状体。2. The inorganic plate-like body according to claim 1, wherein the amount of the adhesive substance applied is 20 to 50 g / m 2 in terms of solid content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5116933A JP2723777B2 (en) | 1993-05-19 | 1993-05-19 | Inorganic plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5116933A JP2723777B2 (en) | 1993-05-19 | 1993-05-19 | Inorganic plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06328611A JPH06328611A (en) | 1994-11-29 |
| JP2723777B2 true JP2723777B2 (en) | 1998-03-09 |
Family
ID=14699296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5116933A Expired - Lifetime JP2723777B2 (en) | 1993-05-19 | 1993-05-19 | Inorganic plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2723777B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144118A (en) * | 1974-10-14 | 1976-04-15 | Asahi Chemical Ind | KEIRYOKENCHIKUZAIRYO OYOBISONO SEIZOHO |
| JPS5715068A (en) * | 1980-06-27 | 1982-01-26 | Hirofumi Yamashita | Mudguard device for automobile |
| JPS5753307A (en) * | 1980-09-16 | 1982-03-30 | Hajime Watanabe | Method of forming cavity at center of wood for construction and preventing breaking point of surface |
-
1993
- 1993-05-19 JP JP5116933A patent/JP2723777B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06328611A (en) | 1994-11-29 |
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