JPH0533464A - Inorganic construction plate - Google Patents
Inorganic construction plateInfo
- Publication number
- JPH0533464A JPH0533464A JP3194183A JP19418391A JPH0533464A JP H0533464 A JPH0533464 A JP H0533464A JP 3194183 A JP3194183 A JP 3194183A JP 19418391 A JP19418391 A JP 19418391A JP H0533464 A JPH0533464 A JP H0533464A
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- Prior art keywords
- inorganic
- weight
- plate
- specific gravity
- outer layer
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、壁下地材等に用いられ
る無機建築板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic building board used as a wall base material or the like.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】一般に、
壁下地材等に用いられる無機建築板には、使用上の見地
より、所定の強度，表面硬度および熱伝導率等が要求さ
れるとともに、施工上の見地より、軽量で所定の全体硬
度を有し、ビス止め可能なものであることが要求され
る。このため、従来例より、壁下地材として石膏ボード
が広く使用されている。2. Description of the Related Art Generally,
Inorganic building boards used as wall base materials, etc. are required to have predetermined strength, surface hardness, thermal conductivity, etc. from the viewpoint of use, and are lightweight and have a predetermined overall hardness from the viewpoint of construction. However, it is required that it can be screwed. Therefore, gypsum board is widely used as a wall base material as compared with the conventional example.
【０００３】しかしながら、近年、施工者の高齢化，都
市交通の混雑等から石膏ボードよりも軽量で、かつ、防
火規制を満たす下地材が要求されている。そこで、石膏
ボードの軽量化のため、その内部に気泡を発生させた
り、あるいは、無機発泡体を混入することも考えられて
いるが、この方法では石膏ボードの強度が低下するとい
う問題点がある。一方、軽量化と同時に強度を維持する
ため、例えば、石膏ボードにパルプ等の有機繊維を混入
することも考えられるが、この方法では防火性が損なわ
れるという問題点がある。However, in recent years, there has been a demand for a base material which is lighter than gypsum board and which meets the fire protection regulations due to the aging of construction workers and the congestion of city traffic. Therefore, in order to reduce the weight of the gypsum board, it has been considered to generate bubbles inside the gypsum board or to mix an inorganic foam, but this method has a problem that the strength of the gypsum board decreases. .. On the other hand, in order to reduce the weight and maintain the strength at the same time, it is conceivable to mix an organic fiber such as pulp into the gypsum board, but this method has a problem that the fireproof property is impaired.
【０００４】本発明は、前記問題点に鑑み、軽量で、下
地材として充分な性能を有する無機建築板を提供するこ
とを目的とする。In view of the above problems, it is an object of the present invention to provide a lightweight inorganic building board having sufficient performance as a base material.
【０００５】[0005]
【課題を解決するための手段】本発明者は、板状芯材
と、その表裏面に設けた外層部との組成を異ならしめて
三層構造とすることにより、石膏ボードよりも軽量で、
かつ、下地材として充分な性能を有する無機建築板を得
られることを見いだし、本発明を完成するに至った。本
発明の要旨は、前記目的を達成するため、無機発泡体と
繊維状物とを主体とし、結合剤を添加して形成した板状
芯材の表裏面に、鉱物質繊維と無機粉状体とを主体と
し、結合剤を添加して形成した外層部を設けて全体比重
を０.５５以下としたことを特徴とする無機建築板にあ
る。Means for Solving the Problems The present inventor has a three-layer structure by differentiating the composition of the plate-shaped core material and the outer layer portions provided on the front and back surfaces thereof, and thus is lighter than the gypsum board,
Moreover, they have found that an inorganic building board having sufficient performance as a base material can be obtained, and have completed the present invention. In order to achieve the above-mentioned object, the gist of the present invention is mainly composed of an inorganic foam and a fibrous material, and a mineral fiber and an inorganic powdery material on the front and back surfaces of a plate-shaped core material formed by adding a binder. The inorganic building board is characterized by mainly including and having an outer layer portion formed by adding a binder so that the overall specific gravity is 0.55 or less.
【０００６】板状芯材を形成する無機発泡体は圧縮強度
を維持しつつ、軽量化するためのものであり、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、板状芯材における無機
発泡体の組成比は５０〜９０重量％とするのが好まし
い。５０重量％以下であると、繊維状物の割合が相対的
に増加するために強度は向上するが、比重低下の効果が
得られないからであり、９０重量％以上であると、繊維
状物とともに均一に抄造することが困難となるからであ
る。The inorganic foamed material forming the plate-shaped core material is for reducing the weight while maintaining the compressive strength.
There are pearlite, shirasu foam, silica flour, glass foam, etc. These can be used alone or in combination of two or more kinds. The composition ratio of the inorganic foam in the plate-shaped core material is preferably 50 to 90% by weight. When the amount is 50% by weight or less, the ratio of the fibrous substance relatively increases, so that the strength is improved, but the effect of lowering the specific gravity cannot be obtained. When the amount is 90% by weight or more, the fibrous substance is increased. At the same time, it becomes difficult to make paper uniformly.
【０００７】板状芯材を形成する繊維状物は前記無機発
泡体同士を連結するためのものであり、例えば、ロック
ウール，スラグウール，パルプ，ポリプロピレン繊維な
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。繊維状物は無機発泡体
を連結し、板状を形成するためのものであり、少なくと
も３重量％以上添加されるが、多くなれば相対的に無機
発泡体の量が低下し、軽量化の目的が達成出来ない。The fibrous material forming the plate-shaped core material is for connecting the inorganic foams to each other, and examples thereof include rock wool, slag wool, pulp and polypropylene fiber. Or 2
It can be used in combination of two or more species. The fibrous material is for connecting inorganic foams to form a plate shape, and is added in an amount of at least 3% by weight. The purpose cannot be achieved.
【０００８】板状心材を形成する結合剤は、前記繊維状
物と無機発泡体とを連結一体化するためのものであり、
例えば、ポリビニルアルコール樹脂，フェノール樹脂等
の合成樹脂や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。The binder forming the plate-shaped core material is for connecting and integrating the fibrous material and the inorganic foam,
For example, polyvinyl alcohol resin, synthetic resin such as phenol resin, starch and the like can be mentioned.
Alternatively, two or more kinds can be used in combination.
【０００９】なお、一般に、結合剤および有機繊維が多
ければ多いほど、曲げ強度が向上するので、板状芯材に
パルプ等の有機繊維を混入することは強度面において有
効であり、また、コスト面において有効である。ただ
し、準不燃材としての無機建築板を得るためには、板状
芯材における有機成分の総量が結合剤を含めて１５重量
％以下となるようにする必要がある。また、不燃材とし
ての無機建築板を得るためには、有機成分の総量を７重
量％以下にする必要があるので、繊維状物として鉱物質
繊維を採用するのが好ましい。Generally, the more the binder and the organic fibers are, the more the bending strength is improved. Therefore, it is effective from the viewpoint of strength to mix the organic fibers such as pulp into the plate-shaped core material in terms of strength. It is effective in terms of aspects. However, in order to obtain an inorganic building board as a semi-incombustible material, it is necessary that the total amount of organic components in the plate-shaped core material is 15% by weight or less including the binder. Further, in order to obtain an inorganic building board as a non-combustible material, the total amount of organic components needs to be 7% by weight or less, so that it is preferable to employ mineral fibers as the fibrous material.
【００１０】板状芯材は、その比重を０.４以下とする
のが好ましい。比重が０.４以上であると、無機建築板
の軽量化を図ることが困難になるからである。なお、板
状芯材は無機建築板の中間層を形成するので、板状芯材
の厚みを増大させることにより、無機建築板の耐えられ
る曲げモーメントが大きくなるという利点がある。The specific gravity of the plate-shaped core material is preferably 0.4 or less. This is because it is difficult to reduce the weight of the inorganic building board when the specific gravity is 0.4 or more. Since the plate-shaped core material forms an intermediate layer of the inorganic building board, increasing the thickness of the plate-shaped core material has an advantage that the bending moment that the inorganic building board can withstand becomes large.
【００１１】外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，
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、
鉱物質繊維の外層部における組成比は２０〜６０重量％
とするのが好ましい。２０重量％以下であると、曲げ強
度が低く、ビス打込時に表面が破壊し易いからであり、
６０重量％以上であると、無機粉状体の添加量が低くな
り、表面硬度および全体硬度を高く出来ないからであ
る。The mineral fibers forming the outer layer include, for example, rock wool, slag wool, mineral wool,
Glass fiber etc. can be mentioned, these are alone,
Alternatively, two or more kinds can be used in combination. And
The composition ratio of the mineral fiber in the outer layer is 20 to 60% by weight.
Is preferred. When the content is 20% by weight or less, the bending strength is low and the surface is easily broken during screw driving,
This is because if it is 60% by weight or more, the amount of the inorganic powder to be added becomes low, and the surface hardness and overall hardness cannot be increased.
【００１２】外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、外層部における無機粉状体の組成比は、
４０〜７０重量％とするのが好ましい。４０重量％以下
になると、所望の表面硬度が得られないからであり、７
０重量％以上になると、鉱物質繊維の割合が相対的に減
少するため、所望の強度が得られないからである。さら
に、外層部の強度は、粒径約１５０μの無機粉状体を用
いた場合が最も大きいが、無機粉状体は平均粒径４０μ
〜３００μのものであってもよい。The inorganic powdery material forming the outer layer portion is for increasing hardness and screwing performance while maintaining fire resistance. Examples include calcium carbonate, silica sand, microsilica, slag, and aluminum hydroxide. Etc. can be mentioned. Then, the composition ratio of the inorganic powder in the outer layer portion,
It is preferably 40 to 70% by weight. This is because if the amount is less than 40% by weight, the desired surface hardness cannot be obtained.
This is because when the content is 0% by weight or more, the ratio of the mineral fiber is relatively reduced, and the desired strength cannot be obtained. Further, the strength of the outer layer portion is highest when the inorganic powder having a particle size of about 150 μ is used, but the inorganic powder has an average particle size of 40 μ.
˜300 μ may be used.
【００１３】外層部の比重は０.６以上、特に、０.７以
上が好ましい。なぜならば、一般に、無機粉状体の割合
を一定、例えば、６０重量％とし、他の材料の組成を異
ならしめて外層部を形成した場合、外層部の比重と表面
硬度、および、その比重と曲げ強度にはそれぞれ相関関
係があり、比重の増加につれて表面硬度，曲げ強度が増
加する（図１および図２）。そして、実用上、石膏ボー
ドとほぼ同等の表面硬度および曲げ強度を得るために
は、外層部の比重が０.７以上になることが必要だから
である。The specific gravity of the outer layer portion is preferably 0.6 or more, particularly preferably 0.7 or more. This is because, in general, when the outer layer portion is formed by setting the proportion of the inorganic powder to a constant value, for example, 60% by weight, and making the composition of the other material different, the specific gravity and surface hardness of the outer layer portion, and the specific gravity and bending thereof. The strengths have a correlation with each other, and the surface hardness and the bending strength increase as the specific gravity increases (FIGS. 1 and 2). Then, in practical use, in order to obtain almost the same surface hardness and bending strength as the gypsum board, the specific gravity of the outer layer portion must be 0.7 or more.
【００１４】なお、外層部を形成する結合剤の材質，添
加量は、前述の板状芯材の場合と同様であるので、説明
を省略する。Since the material and the amount of the binder forming the outer layer portion are the same as in the case of the above-mentioned plate-shaped core material, the description thereof will be omitted.
【００１５】前述したように結合剤および有機繊維が多
ければ多いほど、曲げ強度等が向上するので、鉱物質繊
維の代えてパルプ等の有機繊維を外層部に用いてもよ
い。ただし、準不燃材としての無機建築板を得るには、
有機成分の総量は１５重量％以下であることが必要であ
る。このため、鉱物質繊維の代わりにパルプ等の有機繊
維を用いる場合には、結合剤などの有機成分の総量が前
述の範囲内となるように配慮する必要がある。また、不
燃材としての無機建築板を得るためには、前述の板状芯
材と同様、有機成分の総量を７重量％以下にする必要が
ある。As described above, the more the binder and the organic fibers are, the more the bending strength is improved. Therefore, organic fibers such as pulp may be used in the outer layer portion instead of the mineral fibers. However, to obtain an inorganic building board as a semi-combustible material,
The total amount of organic components needs to be 15% by weight or less. Therefore, when organic fibers such as pulp are used instead of mineral fibers, it is necessary to consider that the total amount of organic components such as binder is within the above range. Further, in order to obtain an inorganic building board as a non-combustible material, it is necessary to set the total amount of organic components to 7% by weight or less, like the above-mentioned plate-shaped core material.
【００１６】次に、本実施例にかかる無機建築板の製造
方法について説明する。例えば、無機発泡体，繊維状
物，結合剤を水中に懸濁せしめて水性スラリーを得、こ
れを湿式抄造して板状芯材となるウエットマットを得る
一方、鉱物質繊維，無機粉状体，結合剤を水中に分散，
懸濁して水性スラリーを得、これを湿式抄造して外層部
となるウエットマットを得た後、板状芯材となる前記ウ
エットマットの表裏面に外層部となる前記ウエットマッ
トを積層して圧締した後、乾燥させて一体化することに
より、無機建築板を製造する方法がある。Next, a method for manufacturing an inorganic building board according to this embodiment will be described. For example, an inorganic foam, a fibrous substance, and a binder are suspended in water to obtain an aqueous slurry, which is wet-processed to obtain a wet mat to be a plate-shaped core material, while a mineral fiber, an inorganic powdery substance are obtained. ， Binder dispersed in water ，
An aqueous slurry is suspended to obtain a wet mat as an outer layer part by wet papermaking, and the wet mat to be an outer layer part is laminated on the front and back surfaces of the wet mat to be a plate-shaped core material and pressed. There is a method of manufacturing an inorganic building board by tightening, drying and integrating.
【００１７】なお、前述の製造方法ではウエットマット
同士を積層一体化する場合について説明したが、湿式に
限らず、乾式による方法、あるいは、乾式と湿式とを組
み合わせた方法など既存の製造方法を選択できる。In the above-mentioned manufacturing method, the case where the wet mats are laminated and integrated has been described, but the existing manufacturing method such as a dry method or a combination of a dry method and a wet method is not limited to a wet method. it can.
【００１８】[0018]
【実施例】以下、本発明にかかる実施例を説明する。 （実施例１）無機発泡体として単位容積質量０.０８
（ｋｇ／ｌ）のパーライト８２重量％、繊維状物として
パルプ１０重量％、結合剤としてフェノール樹脂および
スターチを合計で８重量％の割合で水中に投入，懸濁し
て水性スラリーを得、これを抄造して厚さ１１ｍｍ、比
重０.１５の板状芯材を得る一方、鉱物質繊維としてロ
ックウール２７重量％、無機粉状体として炭酸カルシウ
ム６０重量％、結合剤としてフェノール樹脂およびスタ
ーチを合計で８重量％、補強材としてパルプ５重量％の
割合で混合した後、水中に投入して水性スラリーを得、
これを抄造して厚さ２.０ｍｍ、比重０.６の外層部を得
た後、前記板状芯材の表裏面に前記外層部を積層し、プ
レスで圧締一体化して板状体とし、乾燥させて厚さ９ｍ
ｍ、全体比重０.４５のサンプルを得た。尚、前記炭酸
カルシウムには５０メッシュを通過する粒径ものを用い
ており、パーライトには平均粒径３００μのものを用い
た。EXAMPLES Examples according to the present invention will be described below. (Example 1) Unit volume mass of 0.08 as an inorganic foam
(Kg / l) 82% by weight of perlite, 10% by weight of pulp as a fibrous material, phenol resin and starch as a binder at a total ratio of 8% by weight were added and suspended in water to obtain an aqueous slurry. While making a sheet-like core material with a thickness of 11 mm and a specific gravity of 0.15 by papermaking, 27% by weight of rock wool as mineral fiber, 60% by weight of calcium carbonate as inorganic powder, and phenol resin and starch as binder are combined. 8% by weight and 5% by weight of pulp as a reinforcing material, and then mixed in water to obtain an aqueous slurry,
After this was made into a paper to obtain an outer layer portion having a thickness of 2.0 mm and a specific gravity of 0.6, the outer layer portion was laminated on the front and back surfaces of the plate-shaped core material and integrated by pressing with a press to form a plate-shaped body. , Dried to a thickness of 9m
A sample having m and an overall specific gravity of 0.45 was obtained. The calcium carbonate used had a particle size of 50 mesh, and the pearlite used had an average particle size of 300 μm.
【００１９】（実施例２）無機発泡体として単位容積質
量０.０８（ｋｇ／ｌ）のパーライト８０重量％、繊維
状物としてロックウール１３重量％、結合剤としてフェ
ノール樹脂およびスターチを合計で７重量％の割合で混
練して水性スラリーを得、これを抄造して厚さ１１ｍ
ｍ、比重０．１５の板状芯材を得る一方、鉱物質繊維と
してロックウール３６重量％、無機粉状体として炭酸カ
ルシウム５７重量％、結合剤としてフェノール樹脂およ
びスターチを合計で７重量％の割合で混練して水性スラ
リー得、これを抄造して厚さ２．０ｍｍ、比重０．６の
外層部を得た後、前記板状芯材の表裏面に外層部を積層
し、プレスで圧締一体化して板状体とし、乾燥させて厚
さ９ｍｍ、全体比重０.４５の無機建築板を得た。尚、
前記炭酸カルシウムには５０メッシュを通過する粒径も
のを用いており、パーライトには平均粒径３００μのも
のを用いた。Example 2 80% by weight of perlite having a unit volume mass of 0.08 (kg / l) as an inorganic foam, 13% by weight of rock wool as a fibrous substance, and a total of 7% phenol resin and starch as a binder. An aqueous slurry is obtained by kneading the mixture in a weight% ratio, and this is made into paper and has a thickness of 11 m.
m, a specific gravity of 0.15 while obtaining a plate-shaped core material having a mineral fiber content of 36% by weight of rockwool, an inorganic powder form of 57% by weight of calcium carbonate, and a binder of 7% by weight of phenol resin and starch. After kneading at a ratio to obtain an aqueous slurry, which is made into a paper to obtain an outer layer portion having a thickness of 2.0 mm and a specific gravity of 0.6, the outer layer portion is laminated on the front and back surfaces of the plate-shaped core material and pressed by a press. The plates were compacted and integrated into a plate, and dried to obtain an inorganic building board having a thickness of 9 mm and an overall specific gravity of 0.45. still,
The calcium carbonate used had a particle size of 50 mesh, and the perlite used had an average particle size of 300 μm.
【００２０】（比較例）厚さ９ｍｍ，比重０.７４の市
販の石膏ボードをサンプルとした。Comparative Example A commercially available gypsum board having a thickness of 9 mm and a specific gravity of 0.74 was used as a sample.
【００２１】前記実施例１，２および比較例で得られた
サンプルの物性に関する測定結果を次に表示する。 実施例１ 実施例２ 比較例 厚さ （mm） ９．０ ９．０ ９．０ 比重 ０．４５ ０．４５ ０．７４ 曲げ強度 （kgf／cm2） ７５ ７０ ５０ 表面硬度 （kgf） １７０ １６０ ２２０ ビス貫通力 （kgf） １８ ２０ ２７ 熱伝導率 （kal／mh℃） ０．０６ ０．０６ ０．２７ 防火性 準不燃合格 不燃合格 準不燃合格The measurement results regarding the physical properties of the samples obtained in Examples 1 and 2 and Comparative Example are shown below. Example 1 Example 2 Comparative example Thickness (mm) 9.0 9.0 9.0 Specific gravity 0.45 0.45 0.74 Bending strength (kgf / cm 2 ) 75 70 50 Surface hardness (kgf) 170 160 220 Screw penetration force (kgf) 18 20 27 Thermal conductivity (kal / mh ℃) 0.06 0.06 0.27 Fire resistance Quasi-non-combustible pass Non-flammable pass Quasi-non-flammable pass
【００２２】なお、前記測定結果は下記の方式に基づい
て得られたものである。 曲げ強度：ＪＩＳ ５９０７−１９７７に基づく。 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。 熱伝導率：ＪＩＳ Ａ１４１２に基づく。 防火性：ＪＩＳ Ａ１３２１に基づく。The measurement results are obtained based on the following method. Bending strength: Based on JIS 5907-1977. Surface hardness: Based on JIS HARDNESS TESTER. Screw penetration force: Based on the test method according to JIS A5910. Thermal conductivity: Based on JIS A1412. Fire resistance: Based on JIS A1321.
【００２３】以上の測定結果から明らかなように、実施
例１，２は、比較例よりも比重が２５〜４０％小さい。
比重が４０％小さいということは、標準サイズの石膏ボ
ードが約１１ｋｇである場合に、同一サイズの本発明に
かかる無機建築板では約６．７ｋｇとなることを意味す
る。このため、石膏ボードの場合、重量制限によってト
ラック等の積載可能容積の約半分程度しか利用できない
ときでも、本願無機建築板であれば、トラック等の積載
可能容積一杯に積載できる。この結果、物流コストを大
巾に節減できるだけでなく、施工現場への人力による搬
送およびハンドリングが容易になる。また、実施例１，
２の曲げ強度が比較例のそれよりも約４０％大きいこと
から、変形しにくく、使い勝手がよいことがわかった。
さらに、実施例１，２の熱伝導率が比較例のそれよりも
極めて小さいことから、実施例１，２が比較例よりも断
熱性に優れていることがわかった。As is clear from the above measurement results, the specific gravity of Examples 1 and 2 is smaller than that of Comparative Example by 25 to 40%.
The 40% smaller specific gravity means that when the standard size gypsum board has a weight of about 11 kg, the inorganic building board of the present invention having the same size has a weight of about 6.7 kg. Therefore, in the case of the gypsum board, even if only about half of the loadable volume of a truck or the like can be used due to weight limitation, the inorganic building board of the present invention can be loaded to the full loadable volume of a truck or the like. As a result, not only can physical distribution costs be greatly reduced, but also manual transportation and handling to the construction site becomes easy. In addition, Example 1,
Since the bending strength of No. 2 was about 40% higher than that of Comparative Example, it was found that it was difficult to deform and was easy to use.
Furthermore, since the thermal conductivity of Examples 1 and 2 is extremely smaller than that of Comparative Example, it was found that Examples 1 and 2 have better heat insulating properties than Comparative Example.
【００２４】なお、実施例１,２は、表面硬度およびビ
ス貫通力において比較例よりも小さいが、一般に表面硬
度が１５０（kgf）であれば、凹み等が生じにくく、実
用上は問題はない。また、ビス貫通力は無機建築板の重
量の２．５倍以上必要とされるが、本発明にかかる無機
建築板自体が軽量であることから、この点においても実
用上の問題はない。したがって、本願にかかる無機建築
板は市販の石膏ボードよりも約４０％軽く、市販の石膏
ボードと同等の使用が可能であることがわかった。Although the surface hardness and screw penetration of Examples 1 and 2 are smaller than those of the Comparative Examples, generally, if the surface hardness is 150 (kgf), dents or the like are less likely to occur and there is no problem in practical use. .. Further, the screw penetration force is required to be 2.5 times or more the weight of the inorganic building board, but since the inorganic building board according to the present invention itself is lightweight, there is no practical problem in this respect as well. Therefore, it was found that the inorganic building board according to the present application is about 40% lighter than the commercially available gypsum board, and can be used in the same manner as the commercially available gypsum board.
【００２５】[0025]
【発明の効果】以上の説明から明らかなように、本発明
によれば、無機発泡体と繊維状物とを主体とし、結合剤
を添加して形成した板状芯材の表裏面が、鉱物質繊維と
無機粉状体とを主体とし、結合剤を添加して形成した外
層部で覆われることになるため、軽い板状芯材の表裏面
が硬く緻密な外層部で覆われることになる。このため、
本発明によれば、表面が硬く、ビス止め可能で曲げ強度
大きく、熱伝導率が小さいという下地材として必要な性
能を有する無機建築板が得られる。しかも、全体比重が
０．５５以下であるので、石膏ボードよりも軽量であ
り、運搬，ハンドリングが容易になるという効果があ
る。As is apparent from the above description, according to the present invention, the front and back surfaces of the plate-like core material mainly composed of the inorganic foam and the fibrous material and containing the binder are made of minerals. Since it is mainly composed of fine fibers and inorganic powder, and is covered with the outer layer formed by adding a binder, the front and back surfaces of the light plate-shaped core material are covered with a hard and dense outer layer. .. For this reason,
ADVANTAGE OF THE INVENTION According to this invention, the inorganic building board which has the performance required as a base material whose surface is hard, can be screwed, has a large bending strength, and has low thermal conductivity is obtained. Moreover, since the overall specific gravity is 0.55 or less, it is lighter than the gypsum board, and has an effect of facilitating transportation and handling.
【図１】本実施例にかかる外層部の比重と表面硬度との
相関関係を示すグラフ図である。FIG. 1 is a graph showing a correlation between specific gravity and surface hardness of an outer layer portion according to this example.
【図２】本実施例にかかる外層部の比重と曲げ強度との
相関関係を示すグラフである。FIG. 2 is a graph showing a correlation between specific gravity and bending strength of an outer layer portion according to this example.
【手続補正書】[Procedure amendment]
【提出日】平成４年１０月３０日[Submission date] October 30, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Name of item to be corrected] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 無機建築板[Title of Invention] Inorganic building board
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、壁下地材等に用いられ
る無機建築板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic building board used as a wall base material or the like.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】一般に、
壁下地材等に用いられる無機建築板には、使用上の見地
より、所定の強度，表面硬度および熱伝導率等が要求さ
れるとともに、施工上の見地より、軽量で所定の全体硬
度を有し、ビス止め可能なものであることが要求され
る。このため、従来例より、壁下地材として石膏ボード
が広く使用されている。2. Description of the Related Art Generally,
Inorganic building boards used as wall base materials, etc. are required to have predetermined strength, surface hardness, thermal conductivity, etc. from the viewpoint of use, and are lightweight and have a predetermined overall hardness from the viewpoint of construction. However, it is required that it can be screwed. Therefore, gypsum board is widely used as a wall base material as compared with the conventional example.
【０００３】しかしながら、近年、施工者の高齢化，都
市交通の混雑等から石膏ボードよりも軽量で、かつ、防
火規制を満たす下地材が要求されている。そこで、石膏
ボードの軽量化のため、その内部に気泡を発生させた
り、あるいは、無機発泡体を混入することも考えられて
いるが、この方法では石膏ボードの強度が低下するとい
う問題点がある。一方、軽量化と同時に強度を維持する
ため、例えば、石膏ボードにパルプ等の有機繊維を混入
することも考えられるが、この方法では防火性が損なわ
れるという問題点がある。However, in recent years, there has been a demand for a base material which is lighter than gypsum board and which meets the fire protection regulations due to the aging of construction workers and the congestion of city traffic. Therefore, in order to reduce the weight of the gypsum board, it has been considered to generate bubbles inside the gypsum board or to mix an inorganic foam, but this method has a problem that the strength of the gypsum board decreases. .. On the other hand, in order to reduce the weight and maintain the strength at the same time, it is conceivable to mix an organic fiber such as pulp into the gypsum board, but this method has a problem that the fireproof property is impaired.
【０００４】本発明は、前記問題点に鑑み、軽量で、下
地材として充分な性能を有する無機建築板を提供するこ
とを目的とする。In view of the above problems, it is an object of the present invention to provide a lightweight inorganic building board having sufficient performance as a base material.
【０００５】[0005]
【課題を解決するための手段】本発明者は、板状芯材
と、その表裏面に設けた外層部との組成を異ならしめて
三層構造とすることにより、石膏ボードよりも軽量で、
かつ、下地材として充分な性能を有する無機建築板を得
られることを見いだし、本発明を完成するに至った。本
発明の要旨は、前記目的を達成するため、無機発泡体を
主体とし、適量の繊維状物および結合剤を添加して形成
した板状芯材の表裏面に、鉱物質繊維および無機粉状体
を主体とし、結合剤を添加して形成した外層部を設けて
全体比重を０.５５以下としたことを特徴とする無機建
築板にある。Means for Solving the Problems The present inventor has a three-layer structure by differentiating the composition of the plate-shaped core material and the outer layer portions provided on the front and back surfaces thereof, and thus is lighter than the gypsum board,
Moreover, they have found that an inorganic building board having sufficient performance as a base material can be obtained, and have completed the present invention. In order to achieve the above-mentioned object, the gist of the present invention is mainly composed of an inorganic foam, and a mineral fiber and an inorganic powder are formed on the front and back surfaces of a plate-shaped core material formed by adding an appropriate amount of a fibrous material and a binder. It is an inorganic building board characterized by having a body as a main body, an outer layer portion formed by adding a binder, and having an overall specific gravity of 0.55 or less.
【０００６】板状芯材を形成する無機発泡体は圧縮強度
を維持しつつ、軽量化するためのものであり、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、板状芯材における無機
発泡体の組成比は５０〜９０重量％とするのが好まし
い。５０重量％以下であると、繊維状物の割合が相対的
に増加するために強度は向上するが、比重低下の効果が
得られないからであり、９０重量％以上であると、繊維
状物とともに均一に抄造することが困難となるからであ
る。The inorganic foamed material forming the plate-shaped core material is for reducing the weight while maintaining the compressive strength.
There are pearlite, shirasu foam, silica flour, glass foam, etc. These can be used alone or in combination of two or more kinds. The composition ratio of the inorganic foam in the plate-shaped core material is preferably 50 to 90% by weight. When the content is 50% by weight or less, the ratio of the fibrous material relatively increases, so the strength is improved, but the effect of lowering the specific gravity cannot be obtained. When the content is 90% by weight or more, the fibrous material is At the same time, it becomes difficult to make paper uniformly.
【０００７】板状芯材に添加される繊維状物は前記無機
発泡体同士を連結するためのものであり、例えば、ロッ
クウール，スラグウール，パルプ，ポリプロピレン繊維
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。繊維状物は無機発泡
体を連結し、板状を形成するためのものであり、少なく
とも３重量％以上添加されるが、多くなれば相対的に無
機発泡体の量が低下し、軽量化の目的が達成出来ない。The fibrous material added to the plate-shaped core material is for connecting the inorganic foams to each other, and examples thereof include rock wool, slag wool, pulp and polypropylene fiber. Alone or
Two or more kinds can be used in combination. The fibrous material is for connecting inorganic foams to form a plate shape, and is added in an amount of at least 3% by weight. The purpose cannot be achieved.
【０００８】板状芯材に添加される結合剤は、前記無機
発泡体と繊維状物とを連結一体化するためのものであ
り、例えば、ポリビニルアルコール樹脂，フェノール樹
脂等の合成樹脂や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。The binder added to the plate-shaped core material is for connecting and integrating the inorganic foam and the fibrous material. For example, a synthetic resin such as polyvinyl alcohol resin or phenol resin, or starch. These may be used alone or in combination of two or more.
【０００９】なお、一般に、結合剤および有機繊維が多
ければ多いほど、曲げ強度が向上するので、板状芯材に
パルプ等の有機繊維を混入することは強度面において有
効であり、また、コスト面において有効である。ただ
し、準不燃材としての無機建築板を得るためには、板状
芯材における有機成分の総量が結合剤を含めて１５重量
％以下となるようにする必要がある。また、不燃材とし
ての無機建築板を得るためには、有機成分の総量を７重
量％以下にする必要があるので、不燃材としての繊維状
物としては鉱物質繊維を採用するのが好ましい。Generally, the more the binder and the organic fibers are, the more the bending strength is improved. Therefore, it is effective from the viewpoint of strength to mix the organic fibers such as pulp into the plate-shaped core material in terms of strength. It is effective in terms of aspects. However, in order to obtain an inorganic building board as a semi-incombustible material, it is necessary that the total amount of organic components in the plate-shaped core material is 15% by weight or less including the binder. Further, in order to obtain an inorganic building board as a non-combustible material, the total amount of organic components needs to be 7% by weight or less. Therefore, it is preferable to use mineral fibers as the fibrous material as a non-combustible material.
【００１０】板状芯材は、その比重を０.４以下とする
のが好ましい。比重が０.４以上であると、無機建築板
の軽量化を図ることが困難になるからである。なお、板
状芯材は無機建築板の中間層を形成するので、板状芯材
の厚みを増大させることにより、無機建築板の耐えられ
る曲げモーメントが大きくなるという利点がある。The specific gravity of the plate-shaped core material is preferably 0.4 or less. This is because it is difficult to reduce the weight of the inorganic building board when the specific gravity is 0.4 or more. Since the plate-shaped core material forms an intermediate layer of the inorganic building board, increasing the thickness of the plate-shaped core material has an advantage that the bending moment that the inorganic building board can withstand becomes large.
【００１１】外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，
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、
外層部における鉱物質繊維の組成比は２０〜６０重量％
とするのが好ましい。２０重量％以下であると、曲げ強
度が低く、ビス打込時に表面が破壊し易いからであり、
６０重量％以上であると、無機粉状体の添加量が低くな
り、表面硬度および全体硬度を高く出来ないからであ
る。The mineral fibers forming the outer layer include, for example, rock wool, slag wool, mineral wool,
Glass fiber etc. can be mentioned, these are alone,
Alternatively, two or more kinds can be used in combination. And
The composition ratio of the mineral fibers in the outer layer is 20 to 60% by weight.
Is preferred. When the content is 20% by weight or less, the bending strength is low and the surface is easily broken during screw driving,
This is because if it is 60% by weight or more, the amount of the inorganic powder to be added becomes low, and the surface hardness and overall hardness cannot be increased.
【００１２】外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、外層部における無機粉状体の組成比は、
４０〜７０重量％とするのが好ましい。４０重量％以下
になると、所望の表面硬度が得られないからであり、７
０重量％以上になると、鉱物質繊維の割合が相対的に減
少するため、所望の強度が得られないからである。さら
に、外層部の強度は、粒径約１５０μの無機粉状体を用
いた場合が最も大きいが、無機粉状体は平均粒径４０μ
〜３００μのものであってもよい。The inorganic powdery material forming the outer layer portion is for increasing hardness and screwing performance while maintaining fire resistance. Examples include calcium carbonate, silica sand, microsilica, slag, and aluminum hydroxide. Etc. can be mentioned. Then, the composition ratio of the inorganic powder in the outer layer portion,
It is preferably 40 to 70% by weight. This is because if the amount is 40% by weight or less, the desired surface hardness cannot be obtained.
This is because when the content is 0% by weight or more, the ratio of the mineral fiber is relatively reduced, and the desired strength cannot be obtained. Further, the strength of the outer layer portion is highest when the inorganic powder having a particle size of about 150 μ is used, but the inorganic powder has an average particle size of 40 μ.
˜300 μ may be used.
【００１３】外層部の比重は０.６以上、特に、０.７以
上が好ましい。なぜならば、一般に、無機粉状体の割合
を一定、例えば、６０重量％とし、他の材料の組成を異
ならしめて外層部を形成した場合、外層部の比重と表面
硬度、および、その比重と曲げ強度にはそれぞれ相関関
係があり、比重の増加につれて表面硬度，曲げ強度が増
加する（図１および図２）。そして、実用上、石膏ボー
ドとほぼ同等の表面硬度および曲げ強度を得るために
は、外層部の比重が０.７以上になることが必要だから
である。The specific gravity of the outer layer portion is preferably 0.6 or more, particularly preferably 0.7 or more. This is because, in general, when the outer layer portion is formed by setting the proportion of the inorganic powder to a constant value, for example, 60% by weight, and making the composition of the other material different, the specific gravity and surface hardness of the outer layer portion, and the specific gravity and bending thereof. The strengths have a correlation with each other, and the surface hardness and the bending strength increase as the specific gravity increases (FIGS. 1 and 2). Then, in practical use, in order to obtain almost the same surface hardness and bending strength as the gypsum board, the specific gravity of the outer layer portion must be 0.7 or more.
【００１４】なお、外層部に添加される結合剤の材質，
添加量は、前述の板状芯材の場合と同様であるので、説
明を省略する。また、板状芯材において繊維状物および
結合剤を兼ねるものとして融着性繊維を用いることが出
来る。これによれば、製造過程における結合剤の移動を
防止できるので、強度にバラツキが生ずるのを防止でき
るという利点がある。The material of the binder added to the outer layer,
The addition amount is the same as in the case of the above-mentioned plate-shaped core material, and thus the description thereof is omitted. In addition, fusible fibers can be used as a fibrous material and a binder in the plate-shaped core material. According to this, since the binder can be prevented from moving during the manufacturing process, there is an advantage that variation in strength can be prevented.
【００１５】前述したように結合剤および有機繊維が多
ければ多いほど、曲げ強度等が向上するので、鉱物質繊
維に代えてパルプ等の有機繊維を外層部に用いてもよ
い。ただし、準不燃材としての無機建築板を得るには、
有機成分の総量は１５重量％以下であることが必要であ
る。このため、鉱物質繊維の代わりにパルプ等の有機繊
維を用いる場合には、結合剤などの有機成分の総量が前
述の範囲内となるように配慮する必要がある。また、不
燃材としての無機建築板を得るためには、前述の板状芯
材と同様、有機成分の総量を７重量％以下にする必要が
ある。As described above, the greater the amount of the binder and the organic fibers, the higher the bending strength and the like. Therefore, organic fibers such as pulp may be used in the outer layer portion instead of the mineral fibers. However, to obtain an inorganic building board as a semi-combustible material,
The total amount of organic components needs to be 15% by weight or less. Therefore, when organic fibers such as pulp are used instead of mineral fibers, it is necessary to consider that the total amount of organic components such as binder is within the above range. Further, in order to obtain an inorganic building board as a non-combustible material, it is necessary to set the total amount of organic components to 7% by weight or less, like the above-mentioned plate-shaped core material.
【００１６】次に、本実施例にかかる無機建築板の製造
方法について説明する。例えば、無機発泡体，繊維状
物，結合剤を水中に懸濁せしめて水性スラリーを得、こ
れを湿式抄造して板状芯材となるウエットマットを得る
一方、鉱物質繊維，無機粉状体，結合剤を水中に分散，
懸濁して水性スラリーを得、これを湿式抄造して外層部
となるウエットマットを得た後、板状芯材となる前記ウ
エットマットの表裏面に外層部となる前記ウエットマッ
トを積層して圧締した後、乾燥させて一体化することに
より、無機建築板を製造する方法がある。Next, a method for manufacturing an inorganic building board according to this embodiment will be described. For example, an inorganic foam, a fibrous substance, and a binder are suspended in water to obtain an aqueous slurry, which is wet-processed to obtain a wet mat to be a plate-shaped core material, while a mineral fiber, an inorganic powdery substance are obtained. ， Binder dispersed in water ，
An aqueous slurry is suspended to obtain a wet mat to be an outer layer part by wet-paper-making, and then the wet mat to be an outer layer part is laminated on the front and back surfaces of the wet mat to be a plate-shaped core material and pressed. There is a method of manufacturing an inorganic building board by tightening, drying and integrating.
【００１７】なお、前述の製造方法ではウエットマット
同士を積層一体化する場合について説明したが、湿式に
限らず、乾式による方法、あるいは、乾式と湿式とを組
み合わせた方法など既存の製造方法を選択できる。In the above-mentioned manufacturing method, the case where the wet mats are laminated and integrated has been described, but the existing manufacturing method such as a dry method or a combination of a dry method and a wet method is not limited to a wet method. it can.
【００１８】[0018]
【実施例】以下、本発明にかかる実施例を説明する。 （実施例１）無機発泡体として単位容積質量０.０８
（ｋｇ／ｌ）のパーライト８２重量％、繊維状物として
パルプ１０重量％、結合剤としてフェノール樹脂および
スターチを合計で８重量％の割合で水中に投入，懸濁し
て水性スラリーを得、これを抄造して厚さ１１ｍｍ、比
重０.１５の板状芯材を得る一方、鉱物質繊維としてロ
ックウール２７重量％、無機粉状体として炭酸カルシウ
ム６０重量％、結合剤としてフェノール樹脂およびスタ
ーチを合計で８重量％、補強材としてパルプ５重量％の
割合で混合した後、水中に投入して水性スラリーを得、
これを抄造して厚さ２.０ｍｍ、比重０.６の外層部を得
た後、前記板状芯材の表裏面に前記外層部を積層し、プ
レスで圧締一体化して板状体とし、乾燥させて厚さ９ｍ
ｍ、全体比重０.４５のサンプルを得た。尚、前記炭酸
カルシウムには５０メッシュを通過する粒径ものを用い
ており、パーライトには平均粒径３００μのものを用い
た。EXAMPLES Examples according to the present invention will be described below. (Example 1) Unit volume mass as an inorganic foam 0.08
(Kg / l) 82% by weight of perlite, 10% by weight of pulp as a fibrous material, and 8% by weight of phenol resin and starch as a binder at a total ratio of 8% by weight were added and suspended in water to obtain an aqueous slurry. While making a plate-shaped core material with a thickness of 11 mm and a specific gravity of 0.15, 27% by weight of rock wool as mineral fiber, 60% by weight of calcium carbonate as inorganic powder, and a total of phenol resin and starch as binder 8% by weight and 5% by weight of pulp as a reinforcing material, and then mixed in water to obtain an aqueous slurry,
After this was made into a paper to obtain an outer layer portion having a thickness of 2.0 mm and a specific gravity of 0.6, the outer layer portion was laminated on the front and back surfaces of the plate-shaped core material, and pressed together by a press to form a plate-shaped body. , Dried to a thickness of 9m
m, and an overall specific gravity of 0.45 was obtained. The calcium carbonate used had a particle size of 50 mesh, and the perlite used had an average particle size of 300 μm.
【００１９】（実施例２）無機発泡体として単位容積質
量０.０８（ｋｇ／ｌ）のパーライト８０重量％、繊維
状物としてロックウール１３重量％、結合剤としてフェ
ノール樹脂およびスターチを合計で７重量％の割合で混
練して水性スラリーを得、これを抄造して厚さ１１ｍ
ｍ、比重０．１５の板状芯材を得る一方、鉱物質繊維と
してロックウール３６重量％、無機粉状体として炭酸カ
ルシウム５７重量％、結合剤としてフェノール樹脂およ
びスターチを合計で７重量％の割合で混練して水性スラ
リーを得、これを抄造して厚さ２．０ｍｍ、比重０．６
の外層部を得た後、前記板状芯材の表裏面に外層部を積
層し、プレスで圧締一体化して板状体とし、乾燥させて
厚さ９ｍｍ、全体比重０.４５の無機建築板を得た。
尚、前記炭酸カルシウムには５０メッシュを通過する粒
径ものを用いており、パーライトには平均粒径３００μ
のものを用いた。Example 2 80% by weight of perlite having a unit volume mass of 0.08 (kg / l) as an inorganic foam, 13% by weight of rock wool as a fibrous substance, and a total of 7% phenol resin and starch as a binder. An aqueous slurry is obtained by kneading the mixture in a weight% ratio, and this is made into paper and has a thickness of 11 m.
m, a specific gravity of 0.15 while obtaining a plate-shaped core material having a mineral fiber content of 36% by weight of rockwool, an inorganic powder form of 57% by weight of calcium carbonate, and a binder of 7% by weight of phenol resin and starch. Aqueous slurry is obtained by kneading at a ratio, and this is made into paper and has a thickness of 2.0 mm and a specific gravity of 0.6.
After obtaining the outer layer part, the outer layer part is laminated on the front and back surfaces of the plate-shaped core material, and pressed and integrated with a press to form a plate-like body, which is dried to have a thickness of 9 mm and an overall specific gravity of 0.45. I got a board.
The calcium carbonate used had a particle size of 50 mesh, and pearlite had an average particle size of 300 μm.
I used the one.
【００２０】（比較例）厚さ９ｍｍ，比重０.７４の市
販の石膏ボードをサンプルとした。Comparative Example A commercially available gypsum board having a thickness of 9 mm and a specific gravity of 0.74 was used as a sample.
【００２１】前記実施例１，２および比較例で得られた
サンプルの物性に関する測定結果を次に表示する。 実施例１ 実施例２ 比較例 厚さ （mm） ９．０ ９．０ ９．０ 比重 ０．４５ ０．４５ ０．７４ 曲げ強度 （kgf／cm2） ７５ ７０ ５０ 表面硬度 （kgf） １７０ １６０ ２２０ ビス貫通力 （kgf） １８ ２０ ２７ 熱伝導率 （kal／mh℃） ０．０６ ０．０６ ０．２７ 防火性 準不燃合格 不燃合格 準不燃合格The measurement results regarding the physical properties of the samples obtained in Examples 1 and 2 and Comparative Example are shown below. Example 1 Example 2 Comparative example Thickness (mm) 9.0 9.0 9.0 Specific gravity 0.45 0.45 0.74 Bending strength (kgf / cm 2 ) 75 70 50 Surface hardness (kgf) 170 160 220 Screw penetration force (kgf) 18 20 27 Thermal conductivity (kal / mh ℃) 0.06 0.06 0.27 Fire resistance Quasi-non-combustible pass Non-flammable pass Quasi-non-flammable pass
【００２２】なお、前記測定結果は下記の方式に基づい
て得られたものである。 曲げ強度：ＪＩＳ ５９０７−１９７７に基づく。 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。 熱伝導率：ＪＩＳ Ａ１４１２に基づく。 防火性：ＪＩＳ Ａ１３２１に基づく。The measurement results are obtained based on the following method. Bending strength: Based on JIS 5907-1977. Surface hardness: Based on JIS HARDNESS TESTER. Screw penetration force: Based on the test method according to JIS A5910. Thermal conductivity: Based on JIS A1412. Fire resistance: Based on JIS A1321.
【００２３】以上の測定結果から明らかなように、実施
例１，２は、比較例よりも比重が２５〜４０％小さい。
比重が４０％小さいということは、標準サイズの石膏ボ
ードが約１１ｋｇである場合に、同一サイズの本発明に
かかる無機建築板では約６．７ｋｇとなることを意味す
る。このため、石膏ボードの場合、重量制限によってト
ラック等の積載可能容積の約半分程度しか利用できない
ときでも、本願無機建築板であれば、トラック等の積載
可能容積一杯に積載できる。この結果、物流コストを大
巾に節減できるだけでなく、施工現場への人力による搬
送およびハンドリングが容易になる。また、実施例１，
２の曲げ強度が比較例のそれよりも約４０％大きいこと
から、変形しにくく、使い勝手がよいことがわかった。
さらに、実施例１，２の熱伝導率が比較例のそれよりも
極めて小さいことから、実施例１，２が比較例よりも断
熱性に優れていることがわかった。As is clear from the above measurement results, the specific gravity of Examples 1 and 2 is smaller than that of Comparative Example by 25 to 40%.
The 40% smaller specific gravity means that when the standard size gypsum board has a weight of about 11 kg, the inorganic building board of the present invention having the same size has a weight of about 6.7 kg. Therefore, in the case of the gypsum board, even if only about half of the loadable volume of a truck or the like can be used due to weight limitation, the inorganic building board of the present invention can be loaded to the full loadable volume of a truck or the like. As a result, not only can physical distribution costs be greatly reduced, but also manual transportation and handling to the construction site becomes easy. In addition, Example 1,
Since the bending strength of No. 2 was about 40% higher than that of Comparative Example, it was found that it was difficult to deform and was easy to use.
Furthermore, since the thermal conductivity of Examples 1 and 2 is much smaller than that of Comparative Example, it was found that Examples 1 and 2 have better heat insulating properties than Comparative Example.
【００２４】なお、実施例１,２は、表面硬度およびビ
ス貫通力において比較例よりも小さいが、一般に表面硬
度が１５０（kgf）であれば、凹み等が生じにくく、実
用上は問題はない。また、ビス貫通力は無機建築板の重
量の２．５倍以上必要とされるが、本発明にかかる無機
建築板自体が軽量であることから、この点においても実
用上の問題はない。したがって、本願にかかる無機建築
板は市販の石膏ボードよりも約４０％軽く、市販の石膏
ボードと同等の使用が可能であることがわかった。Although the surface hardness and screw penetration of Examples 1 and 2 are smaller than those of the Comparative Examples, generally, if the surface hardness is 150 (kgf), dents or the like are less likely to occur and there is no problem in practical use. .. Further, the screw penetration force is required to be 2.5 times or more the weight of the inorganic building board, but since the inorganic building board according to the present invention itself is lightweight, there is no practical problem in this respect as well. Therefore, it was found that the inorganic building board according to the present application is about 40% lighter than the commercially available gypsum board, and can be used in the same manner as the commercially available gypsum board.
【００２５】[0025]
【発明の効果】以上の説明から明らかなように、本発明
によれば、無機発泡体を主体とし、適量の繊維状物およ
び結合剤を添加して形成した板状芯材の表裏面が、鉱物
質繊維および無機粉状体を主体とし、結合剤を添加して
形成した外層部で覆われることになるため、軽い板状芯
材の表裏面が硬く緻密な外層部で覆われることになる。
このため、本発明によれば、表面が硬く、ビス止め可能
で曲げ強度大きく、熱伝導率が小さいという下地材とし
て必要な性能を有する無機建築板が得られる。しかも、
全体比重が０．５５以下であるので、石膏ボードよりも
軽量であり、運搬，ハンドリングが容易になるという効
果がある。As is apparent from the above description, according to the present invention, the front and back surfaces of the plate-shaped core material mainly composed of the inorganic foam, and containing the appropriate amount of the fibrous material and the binder, Mainly consists of mineral fibers and inorganic powder, and is covered with the outer layer formed by adding a binder, so the front and back surfaces of the light plate-shaped core material are covered with a hard and dense outer layer. ..
Therefore, according to the present invention, it is possible to obtain an inorganic building board having a surface that is hard, can be screwed, has a large bending strength, and has a low thermal conductivity, which is a performance required as a base material. Moreover,
Since the overall specific gravity is 0.55 or less, it is lighter than the gypsum board, and has an effect of facilitating transportation and handling.
【図面の簡単な説明】[Brief description of drawings]
【図１】本実施例にかかる外層部の比重と表面硬度との
相関関係を示すグラフ図である。FIG. 1 is a graph showing a correlation between specific gravity and surface hardness of an outer layer portion according to this example.
【図２】本実施例にかかる外層部の比重と曲げ強度との
相関関係を示すグラフである。FIG. 2 is a graph showing a correlation between specific gravity and bending strength of an outer layer portion according to this example.
Claims (1)
合剤を添加して形成した板状芯材の表裏面に、鉱物質繊
維と無機粉状体とを主体とし、結合剤を添加して形成し
た外層部を設けて全体比重を０.５５以下としたことを
特徴とする無機建築板。Claim: What is claimed is: 1. A mineral fiber and an inorganic powder are provided on the front and back surfaces of a plate-shaped core material which is mainly composed of an inorganic foam and a fibrous material and to which a binder is added. An inorganic building board, which is mainly composed of an outer layer portion formed by adding a binder so that the overall specific gravity is 0.55 or less.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3194183A JP2655954B2 (en) | 1991-08-02 | 1991-08-02 | Inorganic building board |
| CA 2114620 CA2114620C (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
| KR1019940700336A KR0150509B1 (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
| AU23902/92A AU657162B2 (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
| DE69231156T DE69231156T2 (en) | 1991-08-02 | 1992-07-31 | INORGANIC BUILDING BOARD AND MANUFACTURING METHOD |
| US08/190,105 US5648154A (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
| EP19920916120 EP0601182B1 (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
| PCT/JP1992/000970 WO1993003238A1 (en) | 1991-08-02 | 1992-07-31 | Inorganic constructional board and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3194183A JP2655954B2 (en) | 1991-08-02 | 1991-08-02 | Inorganic building board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0533464A true JPH0533464A (en) | 1993-02-09 |
| JP2655954B2 JP2655954B2 (en) | 1997-09-24 |
Family
ID=16320324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3194183A Expired - Fee Related JP2655954B2 (en) | 1991-08-02 | 1991-08-02 | Inorganic building board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2655954B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2823723B2 (en) | 1991-12-27 | 1998-11-11 | 大建工業株式会社 | Inorganic base plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960792A (en) * | 1982-09-30 | 1984-04-06 | Fujitsu Ltd | Semiconductor memory device |
| JPS60173318U (en) * | 1984-04-26 | 1985-11-16 | 新日鐵化学株式会社 | insulation composite board |
| JPS6178636A (en) * | 1984-09-27 | 1986-04-22 | 大建工業株式会社 | Fiber board |
| JPH01262129A (en) * | 1988-04-14 | 1989-10-19 | Fujimori Kogyo Kk | Fire-retardant panel |
-
1991
- 1991-08-02 JP JP3194183A patent/JP2655954B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960792A (en) * | 1982-09-30 | 1984-04-06 | Fujitsu Ltd | Semiconductor memory device |
| JPS60173318U (en) * | 1984-04-26 | 1985-11-16 | 新日鐵化学株式会社 | insulation composite board |
| JPS6178636A (en) * | 1984-09-27 | 1986-04-22 | 大建工業株式会社 | Fiber board |
| JPH01262129A (en) * | 1988-04-14 | 1989-10-19 | Fujimori Kogyo Kk | Fire-retardant panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2655954B2 (en) | 1997-09-24 |
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