JPH0456795B2 - - Google Patents
Info
- Publication number
- JPH0456795B2 JPH0456795B2 JP1305687A JP1305687A JPH0456795B2 JP H0456795 B2 JPH0456795 B2 JP H0456795B2 JP 1305687 A JP1305687 A JP 1305687A JP 1305687 A JP1305687 A JP 1305687A JP H0456795 B2 JPH0456795 B2 JP H0456795B2
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- dense
- lightweight
- outer periphery
- hardened
- 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
Links
- 239000010440 gypsum Substances 0.000 claims description 102
- 229910052602 gypsum Inorganic materials 0.000 claims description 102
- 239000010410 layer Substances 0.000 claims description 40
- 239000002002 slurry Substances 0.000 claims description 21
- 230000001413 cellular effect Effects 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 239000002344 surface layer Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000011505 plaster Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229920005615 natural polymer Polymers 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 229920005613 synthetic organic polymer Polymers 0.000 claims description 2
- 239000012778 molding material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 229920000609 methyl cellulose Polymers 0.000 description 4
- 239000001923 methylcellulose Substances 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- -1 sodium alkyl sulfate Chemical class 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Producing Shaped Articles From Materials (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は軽量石膏硬化体及びその製造方法に係
り、特に鉄骨耐火被覆材、耐火間仕切材等に使用
するに好適な改良された軽量石膏硬化体及びその
製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lightweight hardened gypsum body and a method for producing the same, and in particular, an improved lightweight hardened gypsum body suitable for use in fireproof coating materials for steel frames, fireproof partition materials, etc. body and its manufacturing method.
［従来の技術］
気泡を多量に含む石膏スラリーを硬化させてつ
くる、軽量石膏硬化体（多泡質石膏板）は、その
軽量性と共に、石膏（二水石膏）の特徴である不
燃性、100℃以上に加熱されたときの結晶水の脱
水により吸熱反応、並びに硬化体内に含有される
多量の気泡による断熱作用等の優れた耐火特性か
ら、鉄骨耐火被覆材、耐火間仕切材等の建材等と
して従来より広く用いられている。[Prior Art] A lightweight hardened gypsum body (multicellular gypsum board), which is made by curing a gypsum slurry containing a large amount of air bubbles, is not only lightweight but also has the characteristics of nonflammability and 100% Due to its excellent fire-resistant properties such as an endothermic reaction due to the dehydration of crystalline water when heated above ℃ and a heat-insulating effect due to the large amount of air bubbles contained in the hardened body, it is used as a building material such as fire-resistant coating materials for steel frames and fire-resistant partition materials. It has been used more widely than before.
この種の硬化体を連続的に製造する方法として
は、例えば特開昭57−144749号が提案されてい
る。この方法では石膏スラリー及び気泡石膏スラ
リーをベルトコンベアの上に流すことを可能にす
るため、つまり型枠の役目を果させるために、外
周部に厚紙を配している。外周部の厚紙は、ま
た、軽量石膏硬化体が多量の気泡を含有している
ため、表面が脆くて取扱い難く、表面が平滑とな
り難いなどの欠点を解消し、硬化体の表面の平滑
さを出すためにも不可欠である。 As a method for continuously producing this type of cured product, for example, Japanese Patent Application Laid-Open No. 144749/1983 has been proposed. In this method, cardboard is placed around the outer periphery to allow the gypsum slurry and aerated gypsum slurry to flow onto a belt conveyor, that is, to serve as a formwork. The cardboard on the outer periphery also eliminates drawbacks such as the light hardened gypsum body containing a large amount of air bubbles, which makes the surface brittle and difficult to handle, and the surface is difficult to smooth. It is also essential for release.
［発明が解決しようとする問題点］
しかしながら、火炎時の耐火材としての軽量石
膏硬化体の使用目的からは、紙、布のような可燃
性ないし発煙性の物質を用いることは耐火材とし
ての特性を阻害することとなり、有利な方法とは
いえない。[Problems to be Solved by the Invention] However, considering the purpose of using the lightweight cured gypsum as a fireproof material in the event of a fire, using flammable or smoke-emitting substances such as paper or cloth is not suitable as a fireproofing material. This cannot be said to be an advantageous method because it impairs the characteristics.
［問題点を解決するための手段］
本発明はこのような従来の多泡質軽量石膏硬化
体板の問題点を解決し、表面が平滑で固く、かつ
高い曲げ強度を有し、しかも耐火材としての十分
な不燃性を備える軽量石膏硬化体と、これを製造
する方法を提供するものであつて、
両板面の表層及び一対の側面の表層がロール成
型法で賦型した緻密質石膏層からなり、内部が気
泡石膏層からなることを特徴とする軽量石膏硬化
体、
及び
ロール成型法で賦型した緻密質石膏板の側端辺
を立設させて上方が開いた皿形形状の外周下部を
製造し、該外周下部の内部に気泡を混入した石膏
スラリーを流し込み、更に該外周下部の上にロー
ル成型法で賦型した緻密質石膏上板を被せて、硬
化、乾燥させることを特徴とする軽量石膏硬化体
の製造方法、
を要旨とするものである。[Means for Solving the Problems] The present invention solves the problems of the conventional multicellular lightweight hardened gypsum board, and has a smooth and hard surface, high bending strength, and is made of fireproof material. The object of the present invention is to provide a lightweight hardened gypsum body with sufficient noncombustibility as an object, and a method for manufacturing the same, in which the surface layer of both plate surfaces and the surface layer of a pair of side surfaces are dense gypsum layers formed by roll molding. A lightweight hardened gypsum body characterized in that the interior is composed of a cellular gypsum layer, and a dish-shaped outer periphery with the side edges of a dense gypsum board formed by roll molding standing upright and open at the top. A lower part is manufactured, a gypsum slurry mixed with air bubbles is poured into the lower part of the outer periphery, and a dense gypsum upper plate formed by roll molding is placed on the lower part of the outer periphery, and then hardened and dried. A method for producing a lightweight hardened gypsum body.
以下、本発明を図面を参照して詳細に説明す
る。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
本発明の軽量石膏硬化体１は、第１図にその断
面を示す如く、両板面の表層１ａ及び一対の側面
の表層１ｂがロール成形法で賦型した緻密質石膏
層２ａ，２ｂからなり、内部が気泡石膏層３から
なる。 As shown in the cross section of FIG. 1, the lightweight hardened gypsum body 1 of the present invention is composed of dense gypsum layers 2a and 2b formed by a roll forming method. , the inside consists of a cellular gypsum layer 3.
第１図に示す例において、硬化体の外表面を形
成する緻密質石膏層は、例えば、半水石膏と水、
又は、半水石膏と水及び補強繊維を主体とするペ
ーストに、凝結遅延剤及び必要に応じて増粘剤を
加えてロール成型により賦型したもので、略コ字
型断面を持つ下板２ａと平板状の上板２ｂとから
なる。これらの下板２ａと上板２ｂはロール成型
により得たものであるから表面は極めて平滑で、
しかも断面コ字型の下板２ａは気泡石膏スラリー
を流し込む際の型枠の役目も果すので厚紙等は全
く必要としない。 In the example shown in FIG. 1, the dense gypsum layer forming the outer surface of the hardened body is composed of, for example, hemihydrate gypsum and water.
Alternatively, a paste mainly consisting of gypsum hemihydrate, water, and reinforcing fibers is added with a setting retardant and, if necessary, a thickener, and formed by roll molding, and the lower plate 2a has a substantially U-shaped cross section. and a flat upper plate 2b. These lower plate 2a and upper plate 2b are obtained by roll forming, so their surfaces are extremely smooth.
Furthermore, the lower plate 2a having a U-shaped cross section also serves as a formwork for pouring the cellular gypsum slurry, so there is no need for cardboard or the like at all.
なお、緻密質石膏層に使用する凝結遅延剤とし
ては、オキシカルボン酸及びその塩類、グルコン
酸及びその塩類、リン酸及びその塩類、アミノ
酸、糖類など公知のものでよく、その添加率は半
水石膏に対して0.01〜5.0重量％が好ましい。ま
た、増粘剤としてはポリビニルアルコール、メチ
ルセルロース等を用いることができ、その添加率
は半水石膏に対し0.1〜3.0重量％が好ましい。 The setting retarder used for the dense gypsum layer may be any known one such as oxycarboxylic acid and its salts, gluconic acid and its salts, phosphoric acid and its salts, amino acids, sugars, etc., and the addition rate is half-water. 0.01 to 5.0% by weight based on plaster is preferred. Moreover, polyvinyl alcohol, methyl cellulose, etc. can be used as a thickener, and the addition rate thereof is preferably 0.1 to 3.0% by weight based on gypsum hemihydrate.
内部の気泡石膏層３は、半水石膏と水、又は、
半水石膏と水及び補強繊維を主体とするスラリー
に、界面活性剤や必要に応じて増粘剤を加えて混
練し多量の気泡を導入して硬化させたものであ
る。この場合、気泡の導入方法は、プレフオーム
法又はミツクスフオーム法のいずれによつても良
い。プレフオーム法は、まず、水にアルキル硫酸
ソーダ、アルキルベンゼンスルホン酸ソーダ、ポ
リオキシエチレンアルキル硫酸塩等の公知の起泡
剤を半水石膏に対し0.02〜2.0重量％添加し、強
力に攪拌して発泡させる。この際にPVA（ポリビ
ニルアルコール）、MC（メチルセルローズ）など
の高分子物質の増粘剤を半水石膏に対し、0.05〜
3.0重量％添加すると、安定した気泡ができる。
この発泡水と半水石膏とを混合してスラリーとす
る。ミツクスフオーム法は、同様は配合で材料を
同時に投入し、強力に攪拌してスラリーとする。
いずれの気泡導入法をとる場合でも、水の量は半
水石膏に対し40〜100重量％が好適である。 The internal cellular gypsum layer 3 is made of hemihydrate gypsum and water, or
A slurry mainly consisting of gypsum hemihydrate, water, and reinforcing fibers is mixed with a surfactant and, if necessary, a thickener, and is hardened by introducing a large amount of air bubbles. In this case, the bubble introduction method may be either a preform method or a mix foam method. In the preform method, first, a known foaming agent such as sodium alkyl sulfate, sodium alkylbenzenesulfonate, or polyoxyethylene alkyl sulfate is added to water in an amount of 0.02 to 2.0% by weight based on gypsum hemihydrate, and the mixture is vigorously stirred to foam. let At this time, add a thickening agent such as PVA (polyvinyl alcohol) or MC (methyl cellulose) to gypsum hemihydrate at a rate of 0.05~
Adding 3.0% by weight creates stable bubbles.
This foamed water and hemihydrate gypsum are mixed to form a slurry. In the mix foam method, materials are added at the same time and mixed vigorously to form a slurry.
Regardless of the bubble introduction method, the amount of water is preferably 40 to 100% by weight based on gypsum hemihydrate.
なお、本発明において、用いる半水石膏はα
型、β型のいずれでも良い。 In addition, in the present invention, the hemihydrate gypsum used is α
Either type or β type may be used.
また、緻密質石膏層及び／又は気泡石膏層に繊
維を配合した場合には、得られる硬化体の強度向
上に有効であるが、繊維配合量が多過ぎると成形
性が損なわれる場合がある。従つて、繊維量は石
膏硬化体に対して10重量％以下とするのが適当で
ある。 Further, when fibers are blended into the dense gypsum layer and/or cellular gypsum layer, it is effective in improving the strength of the resulting cured product, but if the amount of fibers blended is too large, moldability may be impaired. Therefore, it is appropriate that the amount of fibers be 10% by weight or less based on the hardened gypsum body.
この補強繊維としては、ガラス繊維、カーボン
繊維、アスベスト、天然もしくは合成の有機高分
子繊維等が挙げられる。ガラス繊維としては、ス
ラリー混練時にモノフイラメントに解繊する収束
の弱いものが好適であり、また、有機高分子繊維
の具体例としてはビニロン繊維等が挙げられる。
これらは、単独で、あるいは２種以上を組み合せ
て配合することができる。 Examples of the reinforcing fiber include glass fiber, carbon fiber, asbestos, natural or synthetic organic polymer fiber, and the like. As the glass fibers, those with weak convergence that break into monofilaments during slurry kneading are suitable, and specific examples of the organic polymer fibers include vinylon fibers and the like.
These may be used alone or in combination of two or more.
本発明において、気泡石膏層の厚さが厚くて、
外表面の緻密質石膏層の厚さが薄過ぎると本発明
による十分な強度向上効果が得られず、また逆に
気泡石膏層の厚さが薄く、外表面の緻密質石膏層
の厚さが厚過ぎると硬化体の比重が大きくなり、
軽量性が損なわれる。このため、気泡石膏層の厚
さは硬化体の全厚さの50〜95％程度の厚さとなる
ようにするのが適当である。 In the present invention, the thickness of the cellular gypsum layer is thick;
If the thickness of the dense gypsum layer on the outer surface is too thin, the sufficient strength-improving effect of the present invention cannot be obtained, and conversely, if the thickness of the cellular gypsum layer is too thin, If it is too thick, the specific gravity of the cured product will increase,
Lightness is lost. For this reason, it is appropriate that the thickness of the cellular gypsum layer is approximately 50 to 95% of the total thickness of the cured product.
次に第１図に示すような本発明の軽量石膏硬化
体１の製造方法について、第２図を参照して説明
する。 Next, a method for manufacturing the lightweight hardened gypsum body 1 of the present invention as shown in FIG. 1 will be explained with reference to FIG. 2.
本発明の方法においては、まず、適当なミキサ
ーで混練した緻密質石膏ペースト４を、輸送コン
ベア１１に供給し、成型ロール２１、輸送コンベ
ア１２、成型ロール２２を経て連続的に賦型す
る。次に、カツター６により不要な部分をカツト
し、カラー成型ロール２３で端部を折り曲げ、凹
型の断面を有する外周の緻密質石膏層下板２ａの
形状に賦型し、連続的にロール成型する。同時
に、別のミキサーで混練した気泡石膏スラリー５
を上記緻密質石膏層下板２ａ上に連続的に供給
し、これを満たす。続いて、前記緻密質石膏ペー
スト４を輸送コンベア１４に供給し、成型ロール
２４、輸送コンベア１５、成型ロール２５を経て
連続的に平板状に賦型する。そして、カツター７
により不要な部分をカツトし、緻密質石膏層上板
２ｂとし、この上板２ｂで気泡石膏スラリー５で
満たされた緻密質石膏層下板２ａを覆う。これに
より、外周部緻密質石膏層２ａ，２ｂと内部気泡
石膏層３は一体化し、ベルトコンベア１３の上を
移動する間に硬化する。その後、この硬化体は適
当な長さに切断され乾燥工程へと運ばれ、乾燥さ
れて製品とされる。 In the method of the present invention, first, a dense gypsum paste 4 kneaded with a suitable mixer is supplied to a transport conveyor 11, and is continuously shaped via a forming roll 21, a transport conveyor 12, and a forming roll 22. Next, unnecessary portions are cut off using a cutter 6, the ends are bent using a collar forming roll 23, and the outer dense gypsum layer bottom plate 2a having a concave cross section is formed into the shape and continuously roll formed. . At the same time, the aerated gypsum slurry mixed in another mixer 5
is continuously supplied onto the dense gypsum layer lower plate 2a to fill it. Subsequently, the dense gypsum paste 4 is supplied to the transport conveyor 14, and is continuously shaped into a flat plate via the forming roll 24, the transport conveyor 15, and the forming roll 25. And cutter 7
The unnecessary portion is cut out to form a dense gypsum layer upper plate 2b, and this upper plate 2b covers the dense gypsum layer lower plate 2a filled with cellular gypsum slurry 5. As a result, the outer peripheral dense gypsum layers 2a, 2b and the internal cellular gypsum layer 3 are integrated and hardened while moving on the belt conveyor 13. Thereafter, this cured product is cut into appropriate lengths, transported to a drying process, and dried to form a product.
この場合、緻密質石膏ペーストに凝結遅延剤を
配合することにより、押出された上板２ｂと下板
２ａの硬化時間を内部気泡石膏層３の硬化時間に
対して適当に調節することがで、緻密質石膏層と
内部気泡石膏層とが強固に結合した軽量石膏硬化
体が製造され、極めて有利である。 In this case, by adding a setting retarder to the dense gypsum paste, the curing time of the extruded upper plate 2b and lower plate 2a can be appropriately adjusted with respect to the curing time of the internal cellular gypsum layer 3. A lightweight hardened gypsum body is produced in which the dense gypsum layer and the internal cellular gypsum layer are strongly bonded, which is extremely advantageous.
［作用］
本発明の軽量石膏硬化体は、両板面層及び一対
の側面層をロール成形による緻密質石膏層で被覆
した構成とされており、可燃性ないし発煙性物質
による被覆がないので、石膏硬化体の耐火材とし
ての特徴が損なわれることがなく、同一嵩比重の
多泡質石膏のみの硬化体と比べ、曲げ強度が高
く、しかも表面が硬く平滑である。このため、そ
のまま塗装あるいは壁紙等で仕上げることもで
き、壁紙の接着性も良好である。[Function] The lightweight hardened gypsum body of the present invention has a structure in which both plate surface layers and a pair of side layers are covered with a dense gypsum layer formed by roll forming, and there is no coating with flammable or smoke-producing substances. The characteristics of the cured gypsum as a fireproof material are not impaired, and the bending strength is higher than that of a cured body of only cellular gypsum having the same bulk specific gravity, and the surface is hard and smooth. Therefore, it can be painted or finished with wallpaper, etc., and the adhesiveness of wallpaper is also good.
しかして、本発明の製造方法に従つて、外周部
の緻密質石膏ペーストが未だ完全に硬化しない状
態で、気泡石膏スラリーを流し込むことにより、
内部の気泡石膏層と外周の緻密質石膏層との界面
においては、二水石膏の針状の結晶が互いの層を
架橋するように成長し合つて析出するため、両層
間の結合が極めて強固な軽量石膏硬化体が容易に
製造される。 According to the manufacturing method of the present invention, by pouring the aerated gypsum slurry while the dense gypsum paste on the outer periphery has not yet completely hardened,
At the interface between the inner cellular gypsum layer and the outer dense gypsum layer, needle-shaped crystals of dihydrate gypsum grow and precipitate to bridge the layers, creating an extremely strong bond between the two layers. A lightweight, hardened gypsum body can be easily produced.
［実施例］
以下、実施例及び比較例を挙げて本発明を更に
具体的に説明するが、本発明はその要旨を超えな
い限り、以下の実施例に限定されるものではな
い。[Examples] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.
実施例 １
β−半水石膏100重量部に対し、水35重量部、
クエン酸ナトリウム0.1重量部を混練して、ペー
ストＡを調製した。別に、β−半水石膏100重量
部に対し、水80重量部、アニオン型界面活性剤
0.02重量部、ポリビニルアルコール0.1重量部を
混練して、気泡石膏スラリーＢを調製した。Example 1 35 parts by weight of water to 100 parts by weight of β-hemihydrate gypsum,
Paste A was prepared by kneading 0.1 part by weight of sodium citrate. Separately, for 100 parts by weight of β-hemihydrate gypsum, 80 parts by weight of water, anionic surfactant
Cellular gypsum slurry B was prepared by kneading 0.02 part by weight and 0.1 part by weight of polyvinyl alcohol.
ペーストＡをロール成型法により、第２図に示
す方法で外周部下板と外周部上板に賦型し、その
間にスラリーＢを流し込んだ。外周部緻密質石膏
層の厚さは上板、下板ともに５mm、下板断面の高
さは55mm、幅は600mmとした。この成形体の硬化
後、40℃で72時間乾燥して、軽量石膏硬化体を得
た。 Paste A was formed onto a lower outer peripheral plate and an upper outer peripheral plate by a roll molding method as shown in FIG. 2, and slurry B was poured between them. The thickness of the dense gypsum layer on the outer periphery was 5 mm for both the upper and lower plates, the height of the cross section of the lower plate was 55 mm, and the width was 600 mm. After curing this molded body, it was dried at 40° C. for 72 hours to obtain a lightweight hardened gypsum body.
この軽量石膏硬化体の嵩比重は0.69で、曲げ強
度は32Kg／cm2であつた。また、この軽量石膏硬化
体の表面は硬く、平滑であり、壁紙接着性は極め
て良好であつた。 This lightweight hardened gypsum body had a bulk specific gravity of 0.69 and a bending strength of 32 kg/cm 2 . Furthermore, the surface of this lightweight cured gypsum body was hard and smooth, and the wallpaper adhesiveness was extremely good.
実施例 ２
β−半水石膏100重量部に対し水35重量部、ク
エン酸ナトリウム0.1重量部、メチルセルロース
１重量部、グラスフアイバー１重量部を混練し
て、ペーストＣを調製した。Example 2 Paste C was prepared by kneading 100 parts by weight of β-hemihydrate gypsum with 35 parts by weight of water, 0.1 part by weight of sodium citrate, 1 part by weight of methylcellulose, and 1 part by weight of glass fiber.
ペーストＡのかわりにペーストＣを用いたこと
以外は実施例１と同様にして軽量石膏硬化体を得
た。この軽量石膏硬化体の嵩比重は0.68で曲げ強
度は38Kg／cm2であつた。また、この軽量石膏硬化
体の表面は硬く、平滑であり、壁紙接着性は極め
て良好であつた。 A lightweight hardened gypsum body was obtained in the same manner as in Example 1 except that paste C was used instead of paste A. This lightweight hardened gypsum body had a bulk specific gravity of 0.68 and a bending strength of 38 kg/cm 2 . Furthermore, the surface of this lightweight cured gypsum body was hard and smooth, and the wallpaper adhesiveness was extremely good.
比較例 １
β−半水石膏100重量部に対し水80重量部をホ
バートミキサーにて混合して、スラリーＤを調製
した。600mm幅×200mm長さ×60mm厚さの型枠に、
スラリーＤを５mm厚さに注入し、その上に実施例
１で調製したスラリーＢを55mm厚さまで注入し、
更にスラリーＤを60mm厚さまで注入し、硬化後脱
型し、40℃で72時間通風乾燥して軽量石膏硬化体
を得た。Comparative Example 1 Slurry D was prepared by mixing 100 parts by weight of β-hemihydrate gypsum and 80 parts by weight of water using a Hobart mixer. In a formwork of 600mm width x 200mm length x 60mm thickness,
Slurry D was injected to a thickness of 5 mm, on top of which slurry B prepared in Example 1 was injected to a thickness of 55 mm,
Further, slurry D was injected to a thickness of 60 mm, and after curing, the mold was demolded and dried with ventilation at 40°C for 72 hours to obtain a lightweight hardened gypsum body.
この軽量石膏硬化体の嵩比重は0.64で、曲げ強
度は23Kgｆ／cm2であつた。 This lightweight hardened gypsum body had a bulk specific gravity of 0.64 and a bending strength of 23 kgf/cm 2 .
以上の結果から、本発明の軽量石膏硬化体は、
曲げ強度が著しく増大し、しかも、その表面は硬
く平滑となることが明らかである。 From the above results, the lightweight gypsum hardened body of the present invention is
It is clear that the bending strength is significantly increased and the surface becomes hard and smooth.
［発明の効果］
以上詳述した通り、本発明の軽量石膏硬化体
は、両板面層及び一対の側面層がロール成型法で
賦型した緻密質石膏層からなり、内部が気泡石膏
層からなるなるものであつて、軽量で断熱性、遮
音性に優れる上に、
曲げ強度が著しく高く、機械的特性に優れ
る。[Effects of the Invention] As detailed above, the lightweight hardened gypsum body of the present invention consists of both plate surface layers and a pair of side layers formed by a dense gypsum layer formed by a roll molding method, and the inside made of a cellular gypsum layer. It is lightweight, has excellent heat insulation and sound insulation properties, and has extremely high bending strength and excellent mechanical properties.
表面が硬く、平滑である。 The surface is hard and smooth.
このため加工性に優れると共に、塗装、壁紙
仕上げも良好に行うことができる。 Therefore, it has excellent workability and can be applied well to painting and wallpaper finishing.
可燃性ないし発煙性物質の被覆がないため、
石膏の耐火性能が損なわれることがない。 Because there is no coating of flammable or smoke-producing substances,
The fire resistance performance of plaster is not impaired.
等の優れた特徴を有し、耐火建材等として極めて
有用である。It has excellent characteristics such as, and is extremely useful as a fire-resistant building material.
しかして、このような本発明の軽量石膏硬化体
は、上方が開いた皿形形状の緻密質石膏外周下部
をロール成型法で製造し、該外周下部の内部に気
泡を混入した石膏スラリーを流し込み、更に該外
周下部の上にロール成型法で賦型した緻密質石膏
板を被せて硬化、乾燥させることを特徴とする本
発明の製造方法により、優れた層間密着性のもと
に、容易かつ効率的に製造される。 Therefore, such a lightweight hardened gypsum body of the present invention is produced by manufacturing a dish-shaped outer lower part of dense gypsum with an open upper part by roll molding, and pouring gypsum slurry mixed with air bubbles into the inner part of the lower outer periphery. Furthermore, by the manufacturing method of the present invention, which is characterized in that a dense gypsum board formed by a roll molding method is placed over the lower part of the outer periphery, and then hardened and dried, it is possible to easily and Manufactured efficiently.
第１図は本発明の軽量石膏硬化体の一実施例を
示す断面図、第２図は本発明の軽量石膏硬化体の
製造方法の一例を説明する斜視図である。
１……軽量石膏硬化体、２ａ……緻密質石膏層
下板、２ｂ……緻密質石膏層上板、３……気泡石
膏層。
FIG. 1 is a sectional view showing an embodiment of the lightweight hardened gypsum body of the present invention, and FIG. 2 is a perspective view illustrating an example of the method for manufacturing the lightweight hardened gypsum body of the present invention. 1...Light gypsum hardened body, 2a... Dense gypsum layer lower plate, 2b... Dense gypsum layer upper plate, 3... Cellular gypsum layer.
Claims (1)
成型法で賦型した緻密質石膏層からなり、内部が
気泡石膏層からなることを特徴とする軽量石膏硬
化体。 ２ 前記緻密質石膏層及び気泡石膏層の一方又は
双方が繊維を含有することを特徴とする特許請求
の範囲第１項に記載の軽量石膏硬化体。 ３ 繊維がガラス繊維、カーボン繊維、アスベス
ト及び天然もしくは合成の有機高分子繊維よりな
る群から選ばれる１種又は２種以上であることを
特徴とする特許請求の範囲第２項に記載の石膏硬
化体。 ４ 繊維混入率が10重量％以下であることを特徴
とする特許請求の範囲第２項又は第３項に記載の
軽量石膏硬化体。 ５ 気泡石膏層の厚さが軽量石膏硬化体厚さの50
〜95％であることを特徴とする特許請求の範囲第
１項ないし第４項のいずれか１項に記載の軽量石
膏硬化体。 ６ ロール成型法で賦型した緻密質石膏板の側端
辺を立設させて上方が開いた皿形形状の外周下部
を製造し、該外周下部の内部に気泡を混入した石
膏スラリーを流し込み、更に該外周下部の上にロ
ール成型法で賦型した緻密質石膏上板を被せて、
硬化、乾燥させることを特徴とする軽量石膏硬化
体の製造方法。 ７ 前記外周下部は成型ロールから連続的に送り
出される緻密質石膏板をロールにより側端辺を立
設させて連続的に製造されており、前記気泡混入
スラリーが該外周下部内に連続的に流し込まれ、
かつ前記緻密質石膏上板が連続的に成型ロールか
ら送り出されて該外周下部の上に被せられる特許
請求の範囲第６項に記載の軽量石膏硬化体の製造
方法。 ８ 緻密質石膏外周下部及び緻密質石膏上板の成
形材質に、凝結遅延剤を添加することを特徴とす
る特許請求の範囲第６項又は第７項に記載の軽量
石膏硬化体の製造方法。[Scope of Claims] 1. A lightweight hardened gypsum body, characterized in that the surface layers of both board surfaces and the surface layers of a pair of side surfaces are composed of dense gypsum layers formed by roll molding, and the interior is composed of a cellular gypsum layer. 2. The lightweight hardened gypsum body according to claim 1, wherein one or both of the dense gypsum layer and the cellular gypsum layer contain fibers. 3. The plaster curing according to claim 2, wherein the fibers are one or more selected from the group consisting of glass fibers, carbon fibers, asbestos, and natural or synthetic organic polymer fibers. body. 4. The lightweight hardened gypsum body according to claim 2 or 3, characterized in that the fiber content is 10% by weight or less. 5 The thickness of the cellular gypsum layer is 50% of the thickness of the lightweight gypsum hardened body.
95%, the lightweight hardened gypsum body according to any one of claims 1 to 4. 6. The side edges of a dense gypsum board formed by roll molding are erected to produce a lower outer periphery with a dish-shaped opening at the top, and a gypsum slurry mixed with air bubbles is poured into the lower outer periphery. Furthermore, a dense gypsum top plate formed by roll molding is placed over the lower part of the outer periphery,
A method for producing a lightweight hardened gypsum body, which comprises curing and drying. 7. The lower outer periphery is continuously manufactured by making the side edges of the dense gypsum board erect by rolls, which are continuously fed out from a forming roll, and the slurry containing air bubbles is continuously poured into the lower outer periphery. Re,
7. The method of manufacturing a lightweight hardened gypsum body according to claim 6, wherein the dense gypsum top plate is continuously fed out from a forming roll and placed over the lower outer periphery. 8. The method for producing a lightweight hardened gypsum body according to claim 6 or 7, characterized in that a setting retardant is added to the molding material of the lower outer periphery of dense gypsum and the upper dense gypsum plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1305687A JPS63182271A (en) | 1987-01-22 | 1987-01-22 | Lightweight gypsum hardened body and manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1305687A JPS63182271A (en) | 1987-01-22 | 1987-01-22 | Lightweight gypsum hardened body and manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63182271A JPS63182271A (en) | 1988-07-27 |
| JPH0456795B2 true JPH0456795B2 (en) | 1992-09-09 |
Family
ID=11822469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1305687A Granted JPS63182271A (en) | 1987-01-22 | 1987-01-22 | Lightweight gypsum hardened body and manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63182271A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7776170B2 (en) * | 2006-10-12 | 2010-08-17 | United States Gypsum Company | Fire-resistant gypsum panel |
| US20190352232A1 (en) * | 2018-05-21 | 2019-11-21 | United States Gypsum Company | Multi-layer gypsum board and related methods and slurries |
-
1987
- 1987-01-22 JP JP1305687A patent/JPS63182271A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63182271A (en) | 1988-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3929947A (en) | Process for manufacturing wallboard and the like | |
| US4075380A (en) | Construction panels | |
| US20090078162A1 (en) | Gypsum-based Composition | |
| JPH09511732A (en) | Gypsum-containing cementitious composition and material for producing the same | |
| CN1075472A (en) | A kind of light foamed building material containing magnesium | |
| RU2230717C1 (en) | Construction-heat insulation, environmentally safe polystyrene-concrete, method of manufacturing products therefrom, and method of erecting heat-effective protecting structures of buildings therefrom according to "unikon" system | |
| JP3173816B2 (en) | Manufacturing method of composite panel material | |
| WO2015170421A1 (en) | Gypsum cured body, gypsum plate, method for manufacturing gypsum cured body, and method for manufacturing gypsum board | |
| US4150083A (en) | Contouring gypsum articles | |
| JPH0456795B2 (en) | ||
| JPH08104578A (en) | Lightweight gypsum hardened body | |
| JPS63176144A (en) | Light-weight gypsum cured body and manufacture thereof | |
| CN101244919A (en) | A preparation technology of loess foamed lightweight brick | |
| JPS5888156A (en) | Manufacture of fiber reinforced lightweight cement formed body | |
| JPH0451346B2 (en) | ||
| JP3607031B2 (en) | Method for producing inorganic material-coated foamed resin molding | |
| JPH08300550A (en) | Lightweight gypsum hardened body | |
| JPH04125106A (en) | Manufacture of light gypsum hardened body | |
| JPH0648862A (en) | Method for producing hardened reinforced gypsum | |
| JPH08281862A (en) | Lightweight gypsum hardened body and method for producing the same | |
| JPH01283137A (en) | Light-weight gypsum plate | |
| JPH0696473B2 (en) | Glass fiber reinforced cement lightweight cured product | |
| JPH04124055A (en) | Hardened compact of lightweight gypsum | |
| US6251316B1 (en) | Method of producing solid articles of clay foam to be used in building | |
| JPH0417772B2 (en) |