JPS63288933A - Production of cellulose fiber reinforced gypsum board - Google Patents
Production of cellulose fiber reinforced gypsum boardInfo
- Publication number
- JPS63288933A JPS63288933A JP62123655A JP12365587A JPS63288933A JP S63288933 A JPS63288933 A JP S63288933A JP 62123655 A JP62123655 A JP 62123655A JP 12365587 A JP12365587 A JP 12365587A JP S63288933 A JPS63288933 A JP S63288933A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum board
- cellulose fibers
- gypsum
- slurry
- 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.)
- Granted
Links
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 80
- 239000010440 gypsum Substances 0.000 title claims abstract description 80
- 229920003043 Cellulose fiber Polymers 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000002002 slurry Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229920002678 cellulose Polymers 0.000 claims description 12
- 239000001913 cellulose Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000000123 paper Substances 0.000 description 19
- 238000005452 bending Methods 0.000 description 9
- 239000003365 glass fiber Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 241000219492 Quercus Species 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 241000738824 Hottonia palustris Species 0.000 description 1
- LFVLUOAHQIVABZ-UHFFFAOYSA-N Iodofenphos Chemical compound COP(=S)(OC)OC1=CC(Cl)=C(I)C=C1Cl LFVLUOAHQIVABZ-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 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 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はセルロース繊維含有焼石・所スラリーを使用す
るセルロース繊維強化石膏ボードの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing cellulose fiber reinforced gypsum board using a cellulose fiber-containing baked stone slurry.
［従来の技術・問題点］
石膏ボードは焼石膏に適当址の水と慣用の添加剤例えば
接着助剤及び泡剤を添加してなるスラリーを、石膏ボー
ド原紙間に流し込み、次いで９２燥機で乾燥して余剰水
を除去することによって得られる極めて安価で、不燃性
の建築内装材料である。[Prior art/problems] Gypsum board is made by pouring a slurry made of calcined gypsum, adding an appropriate amount of water, and conventional additives such as adhesion aids and foaming agents between base paper for gypsum board, and then drying it in a 92-meter dryer. It is an extremely cheap, non-combustible building interior material obtained by drying to remove excess water.
しかしながら、石膏ボードは他の建築材料、特に木質系
材料に比ベビスの保持力が劣ることが最大の欠点であり
、比較的軽址の絵画、額縁等を設置する場合でも、下地
に使用している木下地等を利用してビス等で固定しなけ
ればならないという欠点をもっている。However, the biggest drawback of gypsum board is that it has poor retention strength compared to other building materials, especially wood-based materials, so even when installing relatively light paintings, picture frames, etc., it cannot be used as a base. It has the disadvantage that it must be fixed with screws, etc. using a wooden base etc.
石膏ボードを強化するために、これまで以下のような製
造方法が用いられてきた。The following manufacturing methods have been used to strengthen gypsum board.
■石膏ボードにガラス繊維を添加し、曲げ衝撃強度を向
上させる方法が知られている。しかし、ガラス繊維の添
加量は後述する石膏スラリー軟度等の面から石膏ボード
製造ラインで石膏ボードを製造する際には限定要素とな
り、ガラス繊維の添加量は焼石膏に対して１％以下の添
加量であり、この場合には曲げ衝撃強度の向」ニは期待
できるが、本来ガラス繊維はマトリックスである石膏と
の付着力が弱く、１つガラス繊維の密度が高いため、７
トリツクス中において菫的に繊維素が不足し、ビスの保
持力改善には何ら役立たない。■It is known to add glass fiber to gypsum board to improve its bending impact strength. However, the amount of glass fiber added is a limiting factor when manufacturing gypsum board on a gypsum board production line due to factors such as the softness of the gypsum slurry, which will be described later. In this case, an improvement in bending impact strength can be expected, but glass fiber originally has a weak adhesion to the matrix of plaster, and the density of glass fiber is high.
There is a serious lack of cellulose in the trix, and it is of no use in improving the retention force of screws.
■石膏ボードの原紙を厚くすると同時に坪量を増やして
曲げ衝撃強度を向上させる方法も知られている。しかし
、この場合、石膏ボード表面の紙量が増加するため、石
膏ボードのもつ鱈大特徴である防火性が低下し、建築用
内装材料としては好ましくない、また、この方法によっ
てもビス保持力の向上はほとんど期待できない。■It is also known to increase the thickness of the base paper for gypsum board and increase its basis weight to improve bending impact strength. However, in this case, as the amount of paper on the surface of the gypsum board increases, the fire resistance, which is the main characteristic of gypsum board, decreases, making it undesirable as an interior construction material. Little improvement can be expected.
［１問題点を解決するための手段］
上述の問題点に鑑み、本発明者らは石膏ボードのビス保
持力を改善する研究を行なった結果、ＪＩＳ Ｐ ８１
２１によるカナダ標準形枦水度が１００〜６５０ｍ１の
範囲内にあるセルロース繊維を焼石膏に添加して得られ
たスラリーで石膏ボードを製造すると、造った石膏ボー
ドのビス保持力が格段に改良されることを見出し、本発
明を完成するに至った。[Means for Solving Problem 1] In view of the above-mentioned problems, the present inventors conducted research to improve the screw retention force of gypsum board, and as a result, JIS P 81.
When a gypsum board is manufactured using a slurry obtained by adding cellulose fibers having a water resistance of 100 to 650 m1 to calcined gypsum, the screw retention strength of the manufactured gypsum board is significantly improved. The present invention was completed based on this discovery.
すなわち、本発明は焼石膏１００重量部に、ＪＩＳ Ｐ
８１２１によるカナダ標準形ｐ水度が１００〜６５０
＋ａ１の範囲内であるセルロース繊維を乾燥セルロース
繊維として１．５〜６．０重量部添加して乾式混合し、
次に水を添加・混合するか、または０２燥セルロース繊
維として１，５〜６．０重量部の面記セルロース繊維を
水に分散し、次に焼石膏１００重星都合添加・混合する
ことによりスラリーとし、このスラリーを石膏ボード原
紙間に流し込み、硬化させることを特徴とするセルロー
ス繊維強化石膏ボードの製造方法にある。That is, the present invention adds JIS P to 100 parts by weight of calcined gypsum.
Canadian standard p water level according to 8121 is 100-650
Adding 1.5 to 6.0 parts by weight of dry cellulose fibers within the range of +a1 and dry mixing,
Next, by adding and mixing water, or by dispersing 1.5 to 6.0 parts by weight of cellulose fiber as 02 dry cellulose fiber in water, and then adding and mixing 100 parts of calcined gypsum. A method for manufacturing a cellulose fiber reinforced gypsum board, which is characterized in that the slurry is made into a slurry, and the slurry is poured between base papers of the gypsum board and cured.
［作 用］
本発明の要旨はＪＩＳ Ｐ ８１２１に示されるカナダ
標準形枦水度が６５０〜１００ｍ１の範囲内のセルロー
ス繊維を焼石膏１００重菫重菫対して１．５〜６．０重
電部添加したスラリーを使用してセルロース繊維強化石
膏ボードを製造することにある。[Function] The gist of the present invention is that cellulose fibers having a Canadian standard water density of 650 to 100 m1 as shown in JIS P 8121 are mixed with 1.5 to 6.0 m The purpose of the present invention is to manufacture cellulose fiber-reinforced gypsum board using a slurry containing a certain amount of carbon dioxide.
本発明においては、補強用繊維としてセルロース繊維を
使用する。セルロース繊維が好適であるのは無機系繊維
例えばガラス繊維は密度が大きいので、ボードコアに添
加しても、コア中に占める繊維素の容積比が小さくなる
ためである。更に、ビス保持力等は繊維素の容積比に比
例するので、密度の大きい無機系繊維を使用することは
不利となる。In the present invention, cellulose fibers are used as reinforcing fibers. Cellulose fibers are preferable because inorganic fibers such as glass fibers have a high density, so even if they are added to the board core, the volume ratio of cellulose in the core will be small. Furthermore, since the screw retention force etc. are proportional to the volume ratio of cellulose, it is disadvantageous to use inorganic fibers with a high density.
これに対して、セルロース繊維は密度が小さいため、コ
ア中に占める容積比が大きくなり、ビス等の保持性能向
上に大きく貢献する。また、セルロース繊維のヤング率
はガラス繊維に比べ小さいが、比表面積はガラス繊維に
比べ極めて大きく、マトリックスである石膏との結合は
物理的に大となり、曲げ衝撃強度の向上もガラス繊維に
比べ遜色なく、叶つビスの保持力向上に対“して極めて
大きな役割を果たすことができる。On the other hand, since cellulose fiber has a low density, it occupies a large volume ratio in the core, which greatly contributes to improving the retention performance of screws and the like. In addition, although the Young's modulus of cellulose fiber is smaller than that of glass fiber, its specific surface area is extremely larger than that of glass fiber, and its bond with the matrix gypsum is physically large, so its bending impact strength is inferior to that of glass fiber. It can play an extremely important role in improving the retention force of screws.
更に、本発明に使用するセルロース繊維はカナダ標準形
Ｐ水度が１００〜６５０＋ｎｌの範囲内にある。この範
囲の炉水度をもつセルロース繊維を焼石膏スラリーに添
加すると、得られる石膏ボードのビス保持力を顕著に向
上させることができる。Furthermore, the cellulose fibers used in the present invention have a Canadian Standard P water content within the range of 100 to 650+nl. When cellulose fibers having a furnace water content within this range are added to the calcined gypsum slurry, the screw retention strength of the resulting gypsum board can be significantly improved.
セルロース繊維のカナダ標準形ｐ水度が６５０ｍ１を趙
える場合には、スラリー中でのセルロース繊維の分散が
不充分なため、得られる石膏ボードに充分なビス保持力
を付与することができないために好ましくなく、また、
カナダ標準形ｐ水度が１０Ｏｎ＋４’未満であると、セ
ルロース繊維が短くなり且つ離解度が大になるため表面
積が大きくなる。When the Canadian standard p water level of cellulose fibers exceeds 650 m1, the dispersion of cellulose fibers in the slurry is insufficient, and the resulting gypsum board cannot be given sufficient screw retention force. undesirable, and
When the Canadian standard p water degree is less than 10On+4', the cellulose fibers become short and the degree of disintegration becomes large, so that the surface area becomes large.
このため一定のスラリー軟度にするには疎水量が多くな
るので嵩密度が低下し、それによって補強効果が発現し
ないために好ましくない。Therefore, in order to obtain a certain slurry softness, the amount of hydrophobicity increases, which lowers the bulk density, which is not preferable because the reinforcing effect is not expressed.
セルロース繊維の配置数は焼石膏１００重殖重呈対して
１．５〜６．０重量部である。該配置数が１．５重量部
未満であると、得られるセルロース繊維補強石膏ボード
に所望のビス保持力を付与することができないために好
ましくなく、また、６．０重量部を超えると後述する石
膏ボード製造ラインで石膏ボードを製造するための焼石
膏スラリーの軟度すなわちフロー値の好適範囲を得るた
めには、疎水量が多くなりすぎ、それによって４ＨＨら
れる石膏ボードの嵩密度か後述の範囲を満足しないもの
となるために好ましくない。The number of cellulose fibers arranged is 1.5 to 6.0 parts by weight per 100 parts by weight of calcined gypsum. If the number is less than 1.5 parts by weight, it is not preferable because the desired screw retention force cannot be imparted to the resulting cellulose fiber-reinforced gypsum board, and if it exceeds 6.0 parts by weight, it will be described later. In order to obtain a suitable range of softness, that is, flow value, of the calcined gypsum slurry for manufacturing gypsum board on a gypsum board production line, the amount of hydrophobicity becomes too large, and the bulk density of the gypsum board, which is reduced to 4HH, must be within the range described below. This is undesirable because it does not satisfy the requirements.
本発明に使用するセルロース繊維の種類は特に限定され
るものではない。これはセルロース繊維を湿式または乾
式で離解または叩解すれば、いずれのセルロース繊維を
使用しても所定範囲内のカナダ標準形ｐ木皮を得ること
ができるためである。The type of cellulose fiber used in the present invention is not particularly limited. This is because if the cellulose fibers are disintegrated or beaten in a wet or dry manner, it is possible to obtain Canadian standard type P bark within a predetermined range regardless of which cellulose fibers are used.
通常、石膏ボード製造ラインで製造される石膏ボードの
嵩密度は０．７〜１ 、０ ｇ／ ｃｍ３の範囲内にあ
る。これは嵩密度が０ 、７ ｇ／ ｃｍ”未満となる
と、石膏ボード用原紙と石膏コアとの接着力が不足し、
石膏ボードとしての機能を失う結果となり、また、嵩密
度が１． 、 Ｏｇ／ ｃｎ＋’を超えると、得られる
石膏ボードの重置が大となるので施工・作業性が悪化す
る。Normally, the bulk density of gypsum board manufactured on a gypsum board production line is within the range of 0.7 to 1.0 g/cm3. This is because when the bulk density is less than 0.7 g/cm, the adhesive strength between the gypsum board base paper and the gypsum core is insufficient.
As a result, it loses its function as a gypsum board, and the bulk density becomes 1. , Og/cn+', the resulting gypsum board will have to be placed one on top of the other, resulting in poor construction and workability.
嵩密度は通常練水菫、泡沫菫及び焼石前壁によりか！整
することができ、焼石膏と疎水との比率は成形性、ボー
ド原紙との接着性、所望の物理的特性を満足するような
軟度になるようにするのが肝要である。しかし、上述の
比率が１ ：１．２を超えると泡沫を加えなくとも嵩密
度は０．７未満となり、また、石膏ボード川原紙との接
着力が不足し、石膏ボードとしての機能を失う結果とな
る。The bulk density is usually due to the water violet, foam violet, and baked stone front wall! It is important that the ratio of plaster of paris to hydrophobicity is such that it has a softness that satisfies moldability, adhesion to base paper, and desired physical properties. However, if the above-mentioned ratio exceeds 1:1.2, the bulk density will be less than 0.7 even without adding foam, and the adhesion to the gypsum board Kawara paper will be insufficient, resulting in a loss of function as a gypsum board. becomes.
また、一般的に嵩密度と物理的強度には高い相関関係が
あり、嵩密度の高い方が強度が大きくなる。In addition, there is generally a high correlation between bulk density and physical strength, and the higher the bulk density, the greater the strength.
更に、石膏ボードラインに使用する焼石膏スラリーの軟
度が低過ぎる場合には、成形不能となるか、または成形
が可能であっても巾方向の分散が悪く、石膏ボード端部
に焼石膏スラリーが入らず、且つ原紙との接着性の悪い
石膏ボードとなるからである。また、軟度が高過ぎる場
合には、成形不能となったり、また、成形が可能であっ
ても成形時にスラリーが飛散し原紙との接着性が悪くな
る。Furthermore, if the softness of the calcined gypsum slurry used for the gypsum board line is too low, it will not be possible to form it, or even if it is possible to form it, the dispersion in the width direction will be poor, and the calcined gypsum slurry will be stuck to the edges of the gypsum board. This is because the gypsum board does not contain any moisture and has poor adhesion to the base paper. If the softness is too high, it may become impossible to mold, or even if molding is possible, the slurry will scatter during molding and the adhesion to the base paper will deteriorate.
それ故、所定の範囲内のスラリー軟度が要求される。Therefore, a slurry softness within a certain range is required.
なお、接着が悪化する原因はスラリー軟度が低過ぎる場
合にあっては成形時に高い圧力が加わるためと考えられ
、また、スラリー軟度が高過ぎる場合には焼石膏の結晶
が原紙にからみつく前に原紙が水で飽和状態となるため
であると推測される。The cause of poor adhesion is thought to be that if the slurry softness is too low, high pressure is applied during molding, and if the slurry softness is too high, the adhesion may deteriorate before the calcined gypsum crystals become entangled with the base paper. It is assumed that this is because the base paper becomes saturated with water.
本発明者らは焼石膏スラリーの軟度を下記に記載する方
法によりＪＩＳ Ｒ５２０１に規定するフローコーンを
使用してフロー値を測定したところ、石膏ボード製造ラ
インで石膏ボードを製造するには該フロー値が９〜２５
ｃＩ１１、好ましくは１０〜１７０輸の範囲内にあるこ
とか必要であるとの知見を得た。The present inventors measured the flow value of calcined gypsum slurry by the method described below using a flow cone specified in JIS R5201. Value is 9-25
It has been found that it is necessary to have cI11, preferably within the range of 10 to 170 imports.
ハ辷−Ｕｅｉ ａｌｌβ色方−広ユ
ガラス板上にＪＩＳ ＋＜ ５２０１に規定されたフロ
ーコーンを用意し、焼石膏に所定址の水を加えて３０秒
間撹拌し、得られた焼石膏スラリーをフローコーンに流
し込み、更に３０秒間経過後、フローコーンを抜き収り
、スラリーの広がり具合を測定する。Prepare a flow cone specified in JIS + < 5201 on a glass plate, add a specified amount of water to the calcined gypsum, stir for 30 seconds, and flow the resulting calcined gypsum slurry. The slurry is poured into a cone, and after an additional 30 seconds, the flow cone is removed and the spread of the slurry is measured.
以上のことから、石膏ボード製造ラインで石膏ボードを
製造する際には、
■石膏ボードの嵩密度が０．７〜１ 、０ ｇ／ ｃｍ
’の範囲内にあるようにするために、焼石・Ｒ／練水比
が１ ：１．２を超えない；
（２）ｆｓ’ｆ、石膏スラリー軟度がフロー値で９〜２
５ｃＩｍ。From the above, when manufacturing gypsum board on a gypsum board manufacturing line, ■ the bulk density of the gypsum board is 0.7 to 1,0 g/cm.
In order to keep the gypsum slurry softness within the range of 9 to 2 in terms of flow value, the baked stone/R/water mixing ratio should not exceed 1:1.2;
5cIm.
好ましくは１０〜１７ｃｍの範囲内にある、ことを満足
しなければならない。Preferably, it must be within the range of 10 to 17 cm.
なお、セルロース繊維強化石膏ボードを石膏ボード製造
ラインで製造する際には、慣用の添加剤を適宜セルロー
ス繊維含有焼石膏スラリーに添加することができること
は言うまでもない。It goes without saying that when cellulose fiber-reinforced gypsum board is manufactured on a gypsum board manufacturing line, conventional additives can be appropriately added to the cellulose fiber-containing calcined gypsum slurry.
［実 施 例］ 以下に実施例を挙げ、本発明を更に説明する。[Example] The present invention will be further explained with reference to Examples below.
十條板紙（株）社より入手のり、Ｂ、に、ｌ’パルプ４
０ｇに水２１を添加したものを離解機（１１木理学二に
某社りに通し、次いで種々の操作条件を用いてビータ−
（東洋精機社製）で処理することにより種々のカナダ標
準形枦木皮をもつ２％バルブ溶液を調製した。Ｐ木皮は
以下の第１表に記載する。なお、添加量によっては２％
パルプ溶液を濾過機を用いて濃度調整したものを使用し
た。このようにして得た種々の濃度及びＰ木皮のパルプ
溶液に焼石膏及び接着助剤としてＩ） Ｖ Ａを添加し
、３０秒間撹拌して第１表に記載する配合をもつ焼石膏
スラリーとし、ガラス板上にスペーサーを置き、下紙原
紙をのせ、下紙原紙上にスラリーを流し込み、ヘラで平
らにした後、上紙原紙を置き、上紙原紙の上にガラス板
を乗せ、上から押して厚さ１．２＋１１Ｒ１に成形し、
これを恒旦となるまでｃ４して実験室内で石膏ボードを
造った。Glue, B, Ni, L' pulp 4 obtained from Jujo Paperboard Co., Ltd.
A mixture of 0 g and 21 g of water was passed through a disintegrating machine (11 wood, manufactured by a certain company), and then passed through a beater using various operating conditions.
(manufactured by Toyo Seiki Co., Ltd.) to prepare 2% bulb solutions with various Canadian standard oak barks. P bark is listed in Table 1 below. In addition, depending on the amount added, 2%
A pulp solution whose concentration was adjusted using a filter was used. To the thus obtained pulp solutions of various concentrations and P bark, calcined gypsum and I) V A as an adhesion aid were added and stirred for 30 seconds to form calcined gypsum slurries having the formulations listed in Table 1, Place a spacer on the glass plate, place the lower paper base paper, pour the slurry onto the lower paper base paper, flatten it with a spatula, then place the upper paper base paper, place the glass plate on top of the upper paper base paper, and press it from above. Molded to a thickness of 1.2+11R1,
This was c4ed until it reached Tsunedan, and plasterboard was made in the laboratory.
−・・ボード ゛告うインでの １
上述と同様のり、Ｂ、に、Ｐパルプ１５０ｋｇと水３０
０ ＯＮとをパルパー（富士製作所製）に投入し、３０
分間離解させることにより５％パルプ溶液とした。得ら
れたバルブのカナダ標準形枦木皮を測定したところ、５
３０ｎｆであった。５％パルプ溶液３焼石膏１００重量
部に対して乾燥セルロース換算で３．５重基部添加、混
合し、接着助剤として酸化テンブンを用い慣用の石膏ボ
ード製造ラインにより１２ｍ＋＊Ｊｌ：の本発明品を得
た。なお、枦木皮が５３０Ｔａ１の１％パルプを乾燥セ
ルロース換算で０．２重壁部使用するが、またはパルプ
を全く添加しない以外は同様の操作にて製造ライン比較
品を得た。- Board ゛At the inn 1. Glue as above, B, 150 kg of P pulp and 30 kg of water.
0 ON into a pulper (manufactured by Fuji Seisakusho), and
A 5% pulp solution was obtained by disintegrating for a minute. When the Canadian standard type oak bark of the obtained valve was measured, it was 5.
It was 30nf. A product of the present invention of 12m+*Jl was produced by adding and mixing 5% pulp solution 3 to 100 parts by weight of calcined gypsum in terms of dry cellulose, and using a conventional gypsum board production line using oxidized tenbun as an adhesion aid. I got it. Comparison products were obtained using the same process except that 1% pulp having a bark of 530 Ta1 was used at a wall thickness of 0.2 times in terms of dry cellulose, or no pulp was added at all.
このようにして得られたセルロース繊維強化石膏ボード
の諸１、ν性分以］この第１表に併記する。ここで、曲
げｖｊ、壊強度はＪＩＳ＾１４０８に準じて求めた。Various properties of the cellulose fiber-reinforced gypsum board thus obtained] are also listed in Table 1. Here, the bending vj and breaking strength were determined according to JIS^1408.
また、ビス保持力試験は得られたセルロース繊維補強石
膏ボードを試験片とし、この試験片に５ｂｕｎφ、４０
ｍＩ＋１のタッピングビスを第１し１に示ずよっに垂直
にネジ込み、試験片表面より１．９＋ｎｉの位置をイン
ストロン荷重試験機で引張り、引張方向のビス引抜抵抗
を求め、ビス保持力とした。In addition, in the screw retention test, the obtained cellulose fiber reinforced gypsum board was used as a test piece, and this test piece had 5 bunφ, 40
Screw in a tapping screw of mI + 1 perpendicularly to the position shown in 1 and 1, pull it with an Instron load tester at a position 1.9 + ni from the test piece surface, determine the screw pullout resistance in the tensile direction, and calculate the screw retention force. did.
第１表の実験室内での製造から次のことが分かる。From the laboratory production shown in Table 1, the following can be seen.
カナダ標準型ｐ木皮が１００〜６５０−のセルロース繊
維を焼石膏１００重址装置対し屹燥セルロース繊維とし
て１．５〜６．０重電部添加して製造したセルロース繊
維強化石膏ボード（本発明例１〜７）は、セルロース繊
維を添加しないもの（比較例１）、セルロース繊維を添
加しても枦木皮が１０Ｏｎ＋ｊ！未満のものを添加した
らのく比較例４及び５）、Ｐ水底が６５０＋ａ１２を超
えるものを添加したもの（比較例７及び８）、枦木皮が
６５０ｍ１であっても添加液が少なかったり、多かった
りするものく比較例２．３及び６）よりもビス保持力及
び長手方向曲げ破壊強度が格段に向上することが認めら
れた。Cellulose fiber-reinforced gypsum board manufactured by adding 1.5 to 6.0 parts of dry cellulose fibers to a 100 parts of calcined gypsum machine using Canadian standard cellulose fibers with a bark of 100 to 650 (invention examples) 1 to 7) have no added cellulose fiber (Comparative Example 1), and even with the addition of cellulose fiber, the oak bark is 10On+j! Comparative Examples 4 and 5), those with a P water bottom of more than 650 + A12 (Comparative Examples 7 and 8), even if the oak bark is 650 ml, the amount of added liquid may be too little or too much. It was observed that the screw retention force and longitudinal bending fracture strength were significantly improved compared to Comparative Examples 2.3 and 6).
なお、セルロース繊維の代わりにガラス繊維を添加した
もの（比較例９）は、長手方向曲げ破壊強度は大きいが
、ビス保持力がセルロース繊維を添加しないものく比較
例１）と殆ど変わらない。In addition, the one in which glass fiber was added instead of cellulose fiber (Comparative Example 9) had a large longitudinal bending fracture strength, but the screw retention force was almost the same as that in Comparative Example 1) in which cellulose fiber was not added.
また、第１表の石膏ボード製造ラインでの製造において
、枦木皮’５３０ｍ１のセルロース繊維を３．５％添加
した本発明例は、Ｐ水底が本発明例と同じセルロース繊
維を使用するが、添加量が０．２％と少なくした（比較
例１）及びセルロース繊維を全く添加しない（比較例２
）よりもビス保持力が約２．５倍も大きくなり、長平方
向曲げ破壊強度が１．６倍も大きくなることが認められ
た。In addition, in the production on the gypsum board manufacturing line shown in Table 1, in the example of the present invention in which 3.5% of cellulose fibers of 530 m1 of oak bark was added, the P water bottom used the same cellulose fiber as the example of the present invention, but the added The amount was reduced to 0.2% (Comparative Example 1) and no cellulose fiber was added (Comparative Example 2).
), it was found that the screw retention force was about 2.5 times greater and the longitudinal bending fracture strength was about 1.6 times greater.
し発明の効果］
本発明方法により得られたセルロース繊維強化石膏ボー
ドは従来の石膏ボードと比べ曲げ破壊強度及びビス保持
力が大巾に改善され、従来の石膏ボードでは得られない
木買系材料に近い物理的性能を得ることができ且つ石膏
ボードの特徴である不燃性等を所持し、安価な建築材料
として極めて利用価値が高いものである。[Effects of the Invention] The cellulose fiber-reinforced gypsum board obtained by the method of the present invention has greatly improved bending fracture strength and screw retention strength compared to conventional gypsum boards, and is a wood-based material that cannot be obtained with conventional gypsum boards. It is possible to obtain physical performance similar to that of gypsum board, and possesses the characteristics of gypsum board such as nonflammability, making it extremely useful as an inexpensive building material.
第１図は第１表に記載するビス保持力の測定方法を示す
図である。FIG. 1 is a diagram showing a method for measuring the screw holding force listed in Table 1.
Claims (1)
ダ標準形ろ水度が１００〜６５０ｍｌの範囲内であるセ
ルロース繊維を乾燥セルロース繊維として１．５〜６．
０重量部添加して乾式混合し、次に水を添加・混合する
か、または乾燥セルロース繊維として１．５〜６．０重
量部の前記セルロース繊維を水に分散し、次に焼石膏１
００重量部を添加・混合することによりスラリーとし、
このスラリーを石膏ボード原紙間に流し込み、硬化させ
ることを特徴とするセルロース繊維強化石膏ボードの製
造方法。To 100 parts by weight of calcined gypsum, dry cellulose fibers having a Canadian standard freeness according to JISP8121 of 100 to 650 ml are mixed as dry cellulose fibers.
Add 0 parts by weight and dry mix, then add and mix water, or disperse 1.5 to 6.0 parts by weight of the cellulose fibers as dry cellulose fibers in water, then add 1 part by weight of calcined gypsum.
A slurry is made by adding and mixing 00 parts by weight,
A method for producing cellulose fiber-reinforced gypsum board, which comprises pouring this slurry between gypsum board base papers and curing it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123655A JPH0712968B2 (en) | 1987-05-22 | 1987-05-22 | Method for producing cellulose fiber reinforced gypsum board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123655A JPH0712968B2 (en) | 1987-05-22 | 1987-05-22 | Method for producing cellulose fiber reinforced gypsum board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63288933A true JPS63288933A (en) | 1988-11-25 |
| JPH0712968B2 JPH0712968B2 (en) | 1995-02-15 |
Family
ID=14865991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62123655A Expired - Lifetime JPH0712968B2 (en) | 1987-05-22 | 1987-05-22 | Method for producing cellulose fiber reinforced gypsum board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712968B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000059698A1 (en) * | 1999-03-30 | 2000-10-12 | Building Materials Technology Laboratories, K.K. | Gypsum board, gypsum board producing method and gypsum board producing device |
| JP2019189519A (en) * | 2018-04-23 | 2019-10-31 | オゾンセーブ株式会社 | Heat insulation material and manufacturing method for heat insulation material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5731177B2 (en) * | 2010-12-02 | 2015-06-10 | 永大産業株式会社 | Method for producing gypsum cured body and gypsum cured body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325339A (en) * | 1976-08-23 | 1978-03-09 | Hitachi Ltd | Transistor protection circuit |
| JPS6042267A (en) * | 1983-08-16 | 1985-03-06 | 太平洋セメント株式会社 | Manufacture of noncombustible gypsum board |
-
1987
- 1987-05-22 JP JP62123655A patent/JPH0712968B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325339A (en) * | 1976-08-23 | 1978-03-09 | Hitachi Ltd | Transistor protection circuit |
| JPS6042267A (en) * | 1983-08-16 | 1985-03-06 | 太平洋セメント株式会社 | Manufacture of noncombustible gypsum board |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000059698A1 (en) * | 1999-03-30 | 2000-10-12 | Building Materials Technology Laboratories, K.K. | Gypsum board, gypsum board producing method and gypsum board producing device |
| JP2019189519A (en) * | 2018-04-23 | 2019-10-31 | オゾンセーブ株式会社 | Heat insulation material and manufacturing method for heat insulation material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0712968B2 (en) | 1995-02-15 |
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