JPH0328181A - Production of gypsum board - Google Patents
Production of gypsum boardInfo
- Publication number
- JPH0328181A JPH0328181A JP16094589A JP16094589A JPH0328181A JP H0328181 A JPH0328181 A JP H0328181A JP 16094589 A JP16094589 A JP 16094589A JP 16094589 A JP16094589 A JP 16094589A JP H0328181 A JPH0328181 A JP H0328181A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- slurry
- pts
- type hemihydrate
- water
- 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.)
- Pending
Links
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 38
- 239000010440 gypsum Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 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 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000003365 glass fiber Substances 0.000 claims abstract description 6
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 5
- 239000001923 methylcellulose Substances 0.000 claims abstract description 5
- 239000010893 paper waste Substances 0.000 claims abstract description 5
- 238000004898 kneading Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 6
- HFQQZARZPUDIFP-UHFFFAOYSA-M sodium;2-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HFQQZARZPUDIFP-UHFFFAOYSA-M 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 6
- 238000005187 foaming Methods 0.000 abstract description 6
- 230000005484 gravity Effects 0.000 abstract description 6
- 238000003756 stirring Methods 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000001413 cellular effect Effects 0.000 abstract 1
- -1 methyl cellulose Chemical compound 0.000 abstract 1
- 235000010981 methylcellulose Nutrition 0.000 abstract 1
- 239000011369 resultant mixture Substances 0.000 abstract 1
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、低混水のα型半水石膏を原料として石膏ボー
ドを製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing gypsum board using α-type hemihydrate gypsum with low water content as a raw material.
石膏ボードは吸湿性、耐火性、断熱性、防音性、保温保
冷に優れていることなど数多〈の特黴を有してシシ、天
井材、間仕切シ等に多く利用されている。現在市販され
ている石膏ボードは、すべて石膏原科として標準混水量
が７０〜９０重量一のβ型半水石膏（焼石膏）が使用さ
れてｂ，６、α型半水石膏を原科とした石膏ボードは製
造されていない。Gypsum board has many special properties such as moisture absorption, fire resistance, heat insulation, sound insulation, and excellent heat and cold insulation properties, and is widely used for walls, ceiling materials, partitions, etc. All gypsum boards currently on the market use β-type hemihydrate gypsum (calcined gypsum) with a standard water content of 70 to 90% by weight as the gypsum raw material, and B, 6, and α-type hemihydrate gypsum as the raw material. Gypsum board is no longer manufactured.
上記のように、従来石膏ボードの製造に当ってα型半水
石膏が使用されていないのは、α型半水石膏の標準混水
量が３０〜４０重量噂と低いため、このような低い標準
混水量のものを混練成型した場合には、或型硬化体の嵩
比重が１：３〜Ｌ７と高くなシ、石膏ボードに要求され
る軽量性を損うばかシでなく、ボード原紙との接着性が
充分でないため、従来のβ型半水石膏を用いたものに比
し施工上の欠点があるからである。As mentioned above, the reason why α-type hemihydrate gypsum is not used in the production of gypsum boards is because the standard amount of water mixed with α-type hemihydrate gypsum is rumored to be 30 to 40% by weight, which is why such a low standard When mixed with water and molded, the bulk specific gravity of a certain type of cured product is as high as 1:3 to L7. This is because the adhesion is not sufficient, so there are disadvantages in construction compared to those using conventional β-type hemihydrate gypsum.
一方、このよう渣低混水のα型半水石膏をβ型半水石膏
の標準混水量と同等の比較的多量の水で混練する場合に
は、ゲル化開始時間１でにいわゆるブリージングを引き
起し、石膏粒子と水の分離が生じて好ましくない現象を
呈する。On the other hand, when kneading α-type hemihydrate gypsum with a low mixture of residues with a relatively large amount of water equivalent to the standard amount of water mixed with β-type hemihydrate gypsum, so-called breathing occurs at gelation start time 1. gypsum particles and water, resulting in unfavorable phenomena.
このようｉ理由によシ、低混水のα型半水石膏は石膏ボ
ード原科としては用いられなかったのが実情である。し
かし低混水のα型半水石膏を用いて従来の石膏ボードと
比較して遜色のない石膏ボード製品ができるならば、石
膏ボードの乾燥エネルギーは大巾に低減され、従って生
産価格の低下につながることは明瞭である。For these reasons, the fact is that α-type hemihydrate gypsum with low water content has not been used as a raw material for gypsum board. However, if a gypsum board product that is comparable to conventional gypsum board can be made using α-type hemihydrate gypsum with low mixing content, the drying energy for gypsum board can be greatly reduced, and the production price can therefore be reduced. The connection is clear.
本発明は、上記に鑑み、α型半水石膏を原科として石膏
ボードを製造する方法を提供しようとするものである。In view of the above, it is an object of the present invention to provide a method for manufacturing gypsum board using α-type hemihydrate gypsum as the raw material.
本発明の石膏ボードの製造方法は、水にラウリルベンゼ
ンスルホン酸ソーダとメチルセルｐース系の粘結剤を溶
解させた後故紙とガラス繊維を加えて撹拌起泡させ、と
の起泡液にα型半水石膏を混入し、これを混練して低混
水含泡石膏スラリーを得、同石膏スラリーをボード用原
紙で挾んだ上硬化乾燥する。The method for producing gypsum board of the present invention involves dissolving sodium laurylbenzenesulfonate and a methylcellulose binder in water, then adding waste paper and glass fibers, and stirring and foaming the resulting solution. α-type hemihydrate gypsum is mixed and kneaded to obtain a low water-containing foamed gypsum slurry, which is sandwiched between board base paper and hardened and dried.
本発明にわいて、ラウリルペンセンスルホン酸ソーダを
水に加えることによって、これが界面活性剤として作用
して撹拌時に気泡が多量に発生し、起泡液に含まれる故
紙とメチルセルａ−ス系の粘結剤によってこの気泡が均
一に保持される。筐た、これによって起泡液にα型半水
石膏を添加混合し混練することによって、得られる石膏
スラリーの流動性は良好に保たれ、しかもゲル化開始時
間筐でにブリージング現象が起らず、石膏粒子と水の分
離の発生が防止される。従って、この石膏スラリーをボ
ード用原紙に挾んだ上硬化乾燥することによって得られ
る石膏ボードは均一な多孔性があって嵩比重も少さいと
共に、ボード用原紙との接着性能も高い。In the present invention, by adding sodium lauryl pensene sulfonate to water, it acts as a surfactant and generates a large amount of air bubbles during stirring, which causes the waste paper and methylcellulose-based foam contained in the foaming liquid to be mixed. The binder holds the bubbles uniformly. By adding and mixing α-type hemihydrate gypsum to the foaming liquid and kneading, the resulting gypsum slurry maintains good fluidity, and moreover, no breathing phenomenon occurs at the gelation start time. , the occurrence of separation of gypsum particles and water is prevented. Therefore, the gypsum board obtained by sandwiching this gypsum slurry between base paper for board and curing and drying has uniform porosity, low bulk specific gravity, and high adhesion performance with base paper for board.
１た、上記起泡液に含１れるガラス繊維は、製品として
の石膏ボードの曲げ強度の向上に寄与する。Furthermore, the glass fibers contained in the foaming liquid contribute to improving the bending strength of the gypsum board as a product.
１た更に、α型半水石膏は、混水量が低いために成型後
の乾燥時間を、β型半水石膏の場合に比して、３０〜５
０嘩短縮させることができ、所要乾燥エネルギーも低減
する。1 Furthermore, α-type hemihydrate gypsum has a lower amount of mixed water, so the drying time after molding is 30 to 55% longer than that of β-type hemihydrate gypsum.
The drying time can be reduced to zero, and the required drying energy is also reduced.
以上の通シ、本発明は、従来のβ型半水石膏を原科とし
て製造された石膏ボードの諸物性（嵩比重、曲げ強度、
剥離強度）と比較（〜で遜色のない石膏ボードを短時間
で製造することが可能である。In summary, the present invention has been developed to improve the physical properties (bulk specific gravity, bending strength,
It is possible to manufacture gypsum board in a short time that is comparable in terms of peel strength and peel strength.
本発明の一実施例を以下に説明する。 An embodiment of the present invention will be described below.
ラウリルベンゼンスルホン酸ソーダ１．５３［ｉ部、メ
チルセルロース系の粘結剤として松本油脂社製商品名マ
ーポローズ９０ＭＰ−４０００ ８．０重量部、ガラ
ス繊維（旭ファイバー社製商品名ＯＳ−１３−ＩＤ７１
０，１３ｍＬｘｌＯμｌｉ５）５．０重量部、故紙（石
膏ボード用原紙廃紙と水ｋ卓上型ミキサーで破砕、遠心
分離器で分離したもの）３０重量部（乾燥重量部）に、
水８００重量部を添加して、ピンチミキサーで撹拌起泡
を行なって起泡液とする。この起泡液にα型半水石膏２
０００重量部を混入して（混水量４０重量嘩）１分間混
線を行って石膏スラリーとする。この石膏スラリーを両
側にボード用原紙（表紙と裏紙）を配置した型枠内（内
寸法４００Ｘ５００Ｘ１２ｊｌｌ＋）に流入させ硬化後
離型、６０℃乾燥を行った。1.53 parts by weight of sodium laurylbenzenesulfonate, 8.0 parts by weight of Marporose 90MP-4000 (trade name, manufactured by Matsumoto Yushi Co., Ltd. as a methylcellulose-based binder), glass fiber (trade name OS-13-ID71, manufactured by Asahi Fiber Co., Ltd.)
0.13mL
Add 800 parts by weight of water and stir and foam using a pinch mixer to obtain a foamed liquid. Add α-type hemihydrate gypsum 2 to this foaming liquid.
000 parts by weight (mixed water amount: 40 parts by weight) and mixed for 1 minute to obtain a gypsum slurry. This gypsum slurry was poured into a mold (inner dimensions: 400 x 500 x 12 jll+) with base paper for board (cover and back paper) arranged on both sides, and after hardening, it was released from the mold and dried at 60°C.
得られた石膏ボードの嵩比重は０．８１１／ｄ、曲げ強
度は５６．０！１ｉＰ／−＋Ｊ，剥離強度は３．２９で
あった。The resulting gypsum board had a bulk specific gravity of 0.811/d, a bending strength of 56.0!1 iP/-+J, and a peel strength of 3.29.
（曲げ強度、剥離強度はＪＩＳ−Ａ−６９０１ に準じ
て測定した。）
比較例として、石膏を市販β型半水石膏を用い混水量を
６５重量嘩（水１３００重量部）とし、他は上記実施例
と同様の条件で石膏ボードを製造した。得られた石膏ボ
ードの嵩比重は０．５ ９ ９／ｗｌ、曲げ強度５Ｌ１
１１ｐ／，ｊ、剥離強度２．６警であった。(Bending strength and peel strength were measured according to JIS-A-6901.) As a comparative example, commercially available β-type hemihydrate gypsum was used as the gypsum, the amount of water mixed was 65 parts by weight (1300 parts by weight of water), and the other conditions were as above. A gypsum board was manufactured under the same conditions as in the example. The bulk specific gravity of the obtained gypsum board was 0.599/wl, and the bending strength was 5L1.
The peel strength was 11p/,j, and the peel strength was 2.6m.
以上の通シ、本実施例によれば、β型半水石膏を使用し
た場合に比して遜色のない石膏ボ−ドを得ることができ
る。In conclusion, according to this embodiment, it is possible to obtain a gypsum board that is comparable to the case where β-type hemihydrate gypsum is used.
以上説明したように、本発明によれば、低温水量のα型
半水石膏を使用して現在日本国内に使用されている難燃
１級石膏ボード規格を満足する石膏ボードを短時間に少
い乾燥エネルギーで製造することができる。１た製造さ
れた石膏ボードは、吸湿性、耐火性、断熱性、防音性、
保温保冷等にかいて優れた性能を有する。As explained above, according to the present invention, by using α-type hemihydrate gypsum with a low water content, it is possible to produce gypsum board in a short time that satisfies the standards for flame-retardant grade 1 gypsum board currently used in Japan. Can be produced using dry energy. 1. The manufactured gypsum board has moisture absorption, fire resistance, heat insulation, soundproofing,
It has excellent performance in keeping things warm and cold.
Claims (1)
ース系の粘結剤を溶解させた後故紙とガラス繊維を加え
て撹拌起泡させ、この起泡液にα型半水石膏を混入し、
これを混練して低混水含泡石膏スラリーを得、同石膏ス
ラリーをボード用原紙で挾んだ上硬化乾燥することを特
徴とする石膏ボードの製造方法。After dissolving sodium laurylbenzenesulfonate and a methylcellulose-based binder in water, waste paper and glass fibers are added, stirred and foamed, and α-type hemihydrate gypsum is mixed into this foamed liquid.
A method for producing a gypsum board, which comprises kneading this to obtain a low water-containing foamed gypsum slurry, sandwiching the gypsum slurry between base paper for board, and then curing and drying the slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16094589A JPH0328181A (en) | 1989-06-26 | 1989-06-26 | Production of gypsum board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16094589A JPH0328181A (en) | 1989-06-26 | 1989-06-26 | Production of gypsum board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0328181A true JPH0328181A (en) | 1991-02-06 |
Family
ID=15725616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16094589A Pending JPH0328181A (en) | 1989-06-26 | 1989-06-26 | Production of gypsum board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0328181A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994015886A1 (en) * | 1993-01-13 | 1994-07-21 | Nachtman Thomas J | Sprayable composition and method for forming a foamed outdoor protective cover layer |
| US6262824B1 (en) | 1997-04-22 | 2001-07-17 | Kabushiki Kaisha Toshiba | Information apparatus having infrared communication device for transmitting/receiving data |
| US6743830B2 (en) | 2001-03-07 | 2004-06-01 | Innovative Construction And Building Materials | Construction board materials with engineered microstructures |
| US6841232B2 (en) | 2002-11-12 | 2005-01-11 | Innovative Construction And Building Materials | Reinforced wallboard |
| US6902797B2 (en) | 2002-11-12 | 2005-06-07 | Innovative Construction And Building Materials | Gypsum-based composite materials reinforced by cellulose ethers |
| US7105587B2 (en) | 2001-03-07 | 2006-09-12 | Innovative Construction And Building Materials | Method and composition for polymer-reinforced composite cementitious construction material |
| US7644808B2 (en) | 2004-06-22 | 2010-01-12 | Mitsubishi Denki Kabushiki Kaisha | Door device of elevator |
-
1989
- 1989-06-26 JP JP16094589A patent/JPH0328181A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994015886A1 (en) * | 1993-01-13 | 1994-07-21 | Nachtman Thomas J | Sprayable composition and method for forming a foamed outdoor protective cover layer |
| US6262824B1 (en) | 1997-04-22 | 2001-07-17 | Kabushiki Kaisha Toshiba | Information apparatus having infrared communication device for transmitting/receiving data |
| US6743830B2 (en) | 2001-03-07 | 2004-06-01 | Innovative Construction And Building Materials | Construction board materials with engineered microstructures |
| US7105587B2 (en) | 2001-03-07 | 2006-09-12 | Innovative Construction And Building Materials | Method and composition for polymer-reinforced composite cementitious construction material |
| US6841232B2 (en) | 2002-11-12 | 2005-01-11 | Innovative Construction And Building Materials | Reinforced wallboard |
| US6902797B2 (en) | 2002-11-12 | 2005-06-07 | Innovative Construction And Building Materials | Gypsum-based composite materials reinforced by cellulose ethers |
| US7644808B2 (en) | 2004-06-22 | 2010-01-12 | Mitsubishi Denki Kabushiki Kaisha | Door device of elevator |
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