JPH06171008A - Fire-retardant gypsum board and base board therefor - Google Patents
Fire-retardant gypsum board and base board thereforInfo
- Publication number
- JPH06171008A JPH06171008A JP32421892A JP32421892A JPH06171008A JP H06171008 A JPH06171008 A JP H06171008A JP 32421892 A JP32421892 A JP 32421892A JP 32421892 A JP32421892 A JP 32421892A JP H06171008 A JPH06171008 A JP H06171008A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum board
- base paper
- weight
- parts
- phosphorus
- 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.)
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- Building Environments (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、不燃性の石膏ボードの
表面を形成する難燃性の石膏ボード用原紙、及び該石膏
ボード用原紙を有する石膏ボードに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant gypsum board base paper which forms the surface of a non-combustible gypsum board, and a gypsum board having the gypsum board base paper.
【０００２】[0002]
【従来の技術】近年、建築用内装材として、防火性、遮
音性及び経済性等に優れた石膏ボードが広く使用されて
いる。この石膏ボードは、一般に、２枚の石膏ボード用
原紙の間に焼石膏スラリーを流して板状に成形し、硬
化、乾燥させることにより製造される、石膏芯を石膏ボ
ード用原紙で被覆したものであり、その防火性は、石膏
自体が含む約21％の結晶水が、火災の際に 100〜 200℃
で潜熱を吸収して放出され、結晶水が消失するまで、石
膏ボードの裏面温度をこの結晶水の放出温度以下に保つ
熱遮断効果によるものである。したがって、石膏ボード
の防火性能を向上させるためには、石膏量を多くすれば
よい。例えば、防火性能を向上させた石膏ボードに、建
設省認定の不燃材料（不燃第1003号）の石膏ボードがあ
り、その石膏ボードは、製品の仕様が比重0.８以上で、
厚さ12mm品の石膏ボードではその重量は9.６kg／m2以上
であって、標準的な石膏ボードの大きさである３′×
６′(910mm×1820mm）板の大きさで約16kg以上とかなり
重いものである。2. Description of the Related Art In recent years, gypsum board excellent in fireproofness, sound insulation and economy has been widely used as an interior material for construction. This gypsum board is generally produced by pouring calcined gypsum slurry between two base papers for gypsum board to form a plate, curing and drying the gypsum core covered with the base paper for gypsum board. The fireproof property is that about 21% of the crystal water contained in the plaster itself is 100-200 ℃ in case of fire.
This is due to the heat blocking effect of keeping the backside temperature of the gypsum board below the release temperature of the crystal water until the latent heat is absorbed and released by the water and the crystal water disappears. Therefore, in order to improve the fireproof performance of the gypsum board, the amount of gypsum should be increased. For example, there is a gypsum board of non-combustible material (incombustible No. 1003) certified by the Ministry of Construction as a gypsum board with improved fire prevention performance, and the gypsum board has a product specific gravity of 0.8 or more,
The weight of a 12 mm thick gypsum board is 9.6 kg / m 2 or more, which is the size of a standard gypsum board 3'x
The size of the 6 '(910 mm x 1820 mm) plate is about 16 kg or more, which is quite heavy.
【０００３】一方、近年、建築物の高層化が進み、構築
物の重量が基礎や躯体等の構造その他に大きく影響する
ことから、建築業界から石膏ボードの優れた特性、特に
高い防火性を備え、かつ軽量である建築資材が要望され
ている。このような建築業界の要望に応えて、実公昭 2
‐4158号及び実公昭 3‐42359 号公報に記載されている
ような不燃性の石膏ボード用板紙及びこれを用いた石膏
ボードなどが開発されてきたが、まだ、十分な耐火性を
有する軽量石膏ボードは得られていなかった。On the other hand, in recent years, as the height of buildings has increased, and the weight of the structure has a great influence on the structure such as the foundation and the skeleton, the construction industry has excellent characteristics of gypsum board, especially high fire resistance, There is also a demand for lightweight construction materials. In response to such demands of the building industry,
Non-combustible board for gypsum board and gypsum board using the same as described in JP-A-4158 and JP-B-3-42359 have been developed, but still light gypsum having sufficient fire resistance. No board was obtained.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、十分な耐火
性を有すると同時に、軽量な石膏ボード及びこの石膏ボ
ードの製造に使用する石膏ボード用原紙を提供すること
を目的とする。さらに詳細には、建設省が行う不燃材料
試験に合格でき、かつ石膏の使用量を減らし比重を0.７
未満に軽量化した石膏ボード、及びその製造を可能にす
る石膏ボード用原紙を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a gypsum board which has sufficient fire resistance and is lightweight, and a gypsum board base paper used for producing the gypsum board. More specifically, we can pass the non-combustible material test conducted by the Ministry of Construction, reduce the amount of plaster used, and reduce the specific gravity to 0.7.
An object of the present invention is to provide a gypsum board whose weight is reduced to less than that, and a gypsum board base paper which enables its production.
【０００５】[0005]
【課題を解決するための手段】前記課題を解決するため
に研究を行った結果、本発明者らは、リン系難燃剤を混
抄した石膏ボード用原紙を用いて石膏ボードを製造する
ことにより、十分な耐火性を有する軽量な石膏ボードが
得られるという知見を得た。したがって、本発明は、リ
ン系難燃剤が混抄されていることを特徴とする難燃性石
膏ボード用原紙、及び当該石膏ボード用原紙を、片面又
は両面に有する石膏ボードを提供するものである。以
下、本発明の内容を詳細に説明する。[Means for Solving the Problems] As a result of research to solve the above problems, the inventors of the present invention produced a gypsum board using a gypsum board base paper mixed with a phosphorus-based flame retardant, We have found that a lightweight gypsum board with sufficient fire resistance can be obtained. Therefore, the present invention provides a base paper for a flame-retardant gypsum board, which is characterized in that a phosphorus-based flame retardant is mixed, and a gypsum board having the base paper for a gypsum board on one side or both sides. Hereinafter, the content of the present invention will be described in detail.
【０００６】本発明の石膏ボード用原紙は、特にその構
造を制限する必要はないが、図１に示すように、一般の
石膏ボード用原紙と同様、表層１、中層２及び裏層３か
らなる３層構造とするのが好ましく、また必要に応じ
て、各層をすき合わせにより積層構造とし、全体とし
て、４乃至８層からなるすき合わせ原紙にすることがで
きる。The gypsum board base paper of the present invention is not particularly limited in its structure, but as shown in FIG. 1, like the general gypsum board base paper, consists of a surface layer 1, a middle layer 2 and a back layer 3. It is preferable to have a three-layer structure, and if necessary, the respective layers can be laminated to form a laminated structure, and a combined base paper consisting of 4 to 8 layers can be obtained as a whole.
【０００７】本発明のリン系難燃剤として使用できるも
のには、赤リン、リン酸一アンモニウム、リン酸二アン
モニウム及びポリリン酸アンモニウムなど、並びにこれ
らの二種以上の混合物がある。尚、混抄に際しては、こ
れらの難燃剤のうち赤リンはそのまま微粒子でも使用で
きるが、可溶性リン酸塩は抄造時に流出してしまうの
で、石膏ボード用原紙に定着させるため、リン系難燃剤
の微粒子の表面を樹脂等で処理しマイクロカプセル化し
て使用するのが好ましい。Examples of the phosphorus-based flame retardant of the present invention include red phosphorus, monoammonium phosphate, diammonium phosphate and ammonium polyphosphate, and mixtures of two or more thereof. Incidentally, in mixed papermaking, red phosphorus among these flame retardants can be used as it is as fine particles, but since soluble phosphate will flow out at the time of papermaking, it is fixed on the base paper for gypsum board. It is preferred to treat the surface of the resin with a resin or the like to form microcapsules for use.
【０００８】使用するリン系難燃剤の粒子の大きさは、
従来の強度や表面性状等の諸特性を維持し、さらに均一
な難燃性を有する石膏ボード用原紙を抄造するために、
微小なほどよい。したがって、その粒径は200 μ以下、
特に１〜100 μであることが好ましい。石膏ボード用原
紙に抄き込むリン系難燃剤の量は、当該原紙の重量を基
準として、リン分として0.１〜５重量％、特に0.３〜３
重量％が好ましい。0.１重量％以下では防火性が不十分
であり、５重量％以上では不完全燃焼による発煙量が増
加し、さらに不経済だからである。The particle size of the phosphorus-based flame retardant used is
In order to maintain various properties such as conventional strength and surface properties, and to fabricate a base paper for gypsum board that has more uniform flame retardancy,
The smaller the better. Therefore, its particle size is less than 200 μ,
It is particularly preferably 1 to 100 μ. The amount of the phosphorus-based flame retardant incorporated into the gypsum board base paper is 0.1 to 5% by weight, especially 0.3 to 3 as a phosphorus content based on the weight of the base paper.
Weight percent is preferred. This is because if it is less than 0.1% by weight, the fireproof property is insufficient, and if it is more than 5% by weight, the amount of smoke generated due to incomplete combustion increases and it is uneconomical.
【０００９】本発明の原紙が表層、中層及び裏層の３層
からなる場合、リン系難燃剤はどの層に混抄してもよ
い。例えば、図１でしめす中層２のみに、中層２と裏層
３に、或いは全層に混抄することができる。リン系難燃
剤の混抄量が前記の範囲内であれば、抄き込む層による
石膏ボード用原紙の難燃性効果の差は殆んどない。な
お、本発明のリン系難燃剤は、石膏ボード用原紙の難燃
性にのみ寄与するものであって、石膏ボードの表面性状
や石膏芯と該原紙との接着性などの性質には、全く影響
しない。When the base paper of the present invention comprises three layers, a surface layer, a middle layer and a back layer, the phosphorus flame retardant may be mixed in any layer. For example, it is possible to mix only the middle layer 2 shown in FIG. 1, the middle layer 2 and the back layer 3, or the whole layer. When the amount of the phosphorus-based flame retardant mixed is within the above range, there is almost no difference in the flame retardancy effect of the base paper for gypsum board due to the layers to be incorporated. The phosphorus-based flame retardant of the present invention contributes only to the flame retardancy of the gypsum board base paper, and the properties such as the surface properties of the gypsum board and the adhesiveness between the gypsum core and the base paper are completely It does not affect.
【００１０】石膏ボード用原紙の米坪は、150 〜350 ｇ
／m2、特に180 〜 250ｇ／m2とするのが好ましい。 150
ｇ／m2以下では、石膏ボード用原紙として要求される強
度がなく、350 ｇ／m2以上では不経済だからである。な
お、原紙が表層、中層及び裏層の３層構造である場合、
表層、中層、裏層の各層間の重量比は、表層10〜40％、
中層20〜60％、裏層10〜50％とするのが望ましい。The base paper for gypsum board has a weight of 150 to 350 g.
/ M 2 , and particularly preferably 180 to 250 g / m 2 . 150
This is because when it is less than g / m 2 , the strength required as a base paper for gypsum board is not obtained, and when it is more than 350 g / m 2, it is uneconomical. In addition, when the base paper has a three-layer structure of a front layer, a middle layer and a back layer,
Surface layer, middle layer, the weight ratio between each layer of the back layer, the surface layer 10-40%,
It is desirable that the middle layer is 20 to 60% and the back layer is 10 to 50%.
【００１１】なお、本発明の原紙を抄造するために使用
するパルプは、特に制限されないが、針葉樹や広葉樹な
どの木材パルプ、古紙パルプ（古新聞、雑誌、ダンボー
ル）などを用いることができる。また、石膏ボード用原
紙の吸水量の抑制や表層に耐摩耗性を付与するために、
原紙の重量を基準としてサイズ剤を 0.1〜２重量％添加
することができる。また、その他の特性を調整するため
に、紙力増強剤、凝集剤、定着剤、顔料などの添加剤を
使用することができる。The pulp used for making the base paper of the present invention is not particularly limited, but wood pulp such as softwood and hardwood, used paper pulp (old newspaper, magazine, cardboard) and the like can be used. In addition, in order to suppress the water absorption of the base paper for gypsum board and impart abrasion resistance to the surface layer,
A sizing agent may be added in an amount of 0.1 to 2% by weight based on the weight of the base paper. Further, in order to adjust other characteristics, additives such as a paper strengthening agent, a coagulant, a fixing agent and a pigment can be used.
【００１２】また、本発明の石膏ボードの製造は、従来
の石膏ボード用原紙の代わりに本発明の難燃性石膏ボー
ド用原紙を使用することを除いては従来法と基本的に何
ら変わることはないので、従来法に沿って行う。すなわ
ち、本発明の石膏ボードは、本発明の難燃性石膏ボード
用原紙間、または難燃性石膏ボード用原紙と従来の石膏
ボード用原紙（坪量 180〜250 g/m2）との間に、焼石膏
を水で混練して得られる焼石膏スラリーを流して板状に
成形し、硬化、乾燥させることにより製造される。尚、
この場合、本発明の石膏ボードの種々の物性を改良する
ために、スラリー中に、石膏の脆さを補強する古紙パル
プ等の有機繊維やガラス繊維等の無機繊維、軽量化のた
めのアルキルベンゼンスルフォン酸塩等の発泡剤、石膏
芯と石膏ボード用原紙との接着を良好にする澱粉やポリ
ビニルアルコール（ＰＶＡ）等の接着助剤（また、ポリ
ビニルアルコール（ＰＶＡ）は石膏芯の増強剤にもな
る）、耐火性向上のための未焼成蛭石や軽量化するため
のパーライト等の骨材、硫酸カリ等の石膏硬化調整剤及
びその他の添加剤を若干量加えることができる。また、
石膏ボードの厚さは任意にできる。The production of the gypsum board of the present invention is basically different from the conventional method except that the flame-retardant gypsum board base paper of the present invention is used in place of the conventional gypsum board base paper. Since there is no such method, the conventional method is used. That is, the gypsum board of the present invention, between the flame-retardant gypsum board base paper of the present invention, or between the flame-retardant gypsum board base paper and the conventional gypsum board base paper (basis weight 180 ~ 250 g / m 2 ) Then, a calcined gypsum slurry obtained by kneading calcined gypsum with water is poured to form a plate, which is cured and dried. still,
In this case, in order to improve various physical properties of the gypsum board of the present invention, in the slurry, organic fibers such as waste paper pulp for reinforcing the brittleness of gypsum, inorganic fibers such as glass fibers, alkylbenzene sulfone for weight reduction. Foaming agents such as acid salts, and adhesion aids such as starch and polyvinyl alcohol (PVA) that improve the adhesion between the gypsum core and the gypsum board base paper (in addition, polyvinyl alcohol (PVA) also serves as a reinforcing agent for the gypsum core. ), Unburned vermiculite for improving fire resistance, aggregates such as pearlite for weight reduction, gypsum hardening modifier such as potassium sulfate, and other additives can be added in a small amount. Also,
The thickness of the gypsum board can be arbitrary.
【００１３】[0013]
【発明の効果】本発明により、建設省が行う不燃材料試
験に合格でき、かつ石膏の使用量を減らし比重を0.７未
満に軽量化した石膏ボードを簡単かつ低コストで製造す
ることができる。例えば、本発明の難燃性石膏ボード用
原紙を使用することにより、厚さが12mmで、かつ比重が
0.55程度の石膏ボードにおいても、防火性が損なわれる
ことなく、建設省で定める不燃材料の条件に適合する。
また、本発明の石膏ボード用原紙を用いることにより、
難燃性の石膏ボードの製造コストを下げることができ
る。Industrial Applicability According to the present invention, a gypsum board that can pass the non-combustible material test conducted by the Ministry of Construction and that reduces the amount of gypsum used and has a specific gravity of less than 0.7 can be manufactured easily and at low cost. . For example, by using the flame-retardant gypsum board base paper of the present invention, the thickness is 12 mm, and the specific gravity is
Even with a gypsum board of about 0.55, it does not impair fire protection and meets the requirements for non-combustible materials specified by the Ministry of Construction.
Further, by using the gypsum board base paper of the present invention,
The manufacturing cost of flame-retardant gypsum board can be reduced.
【００１４】[0014]
【実施例】以下、実施例により本発明をさらに説明す
る。 〔実施例１〕製紙用木材パルプ及び新聞故紙を主体とす
る、下記の表層用、中層用及び裏層用の抄紙用の槽を用
意した。 抄紙槽１（表層用） 製紙用木材パルプ80部及び新聞古紙20部、これらの合計
100 部に対し、ロジンサイズ剤 0.6部、硫酸バンド 3.1
部を攪拌槽に仕込み水を加えて均一に混合攪拌し、3 ％
の濃度に調節した。 抄紙槽２（中層用） 製紙用木材パルプ30部及び新聞古紙70部、これらの合計
100 部に対し、粒径50μの赤リン4.6 部、ロジンサイズ
0.7 部、硫酸バンド3.3 部を攪拌槽に仕込み水を加えて
均一に混合攪拌し、3 ％の濃度に調節した。 抄紙槽３（裏層用） 新聞古紙100 部を攪拌槽に仕込み水を加えて均一に混合
攪拌し、3 ％の濃度に調節した。EXAMPLES The present invention will be further described below with reference to examples. [Example 1] The following paper-making tanks for the surface layer, the middle layer, and the back layer, which mainly consisted of wood pulp for papermaking and newspaper waste paper, were prepared. Papermaking tank 1 (for surface layer) 80 parts of wood pulp for papermaking and 20 parts of waste newspaper, total of these
For every 100 parts, 0.6 parts of rosin sizing agent, 3.1 parts of sulfuric acid band
Part into a stirring tank, add water and stir to mix evenly to 3%.
The concentration was adjusted to. Papermaking tank 2 (for middle layer) 30 parts of wood pulp for papermaking and 70 parts of newspaper waste paper, total of these
For 100 parts, 4.6 parts of red phosphorus with a particle size of 50μ, rosin size
0.7 part and 3.3 parts of sulfuric acid band were charged into a stirring tank, water was added, and the mixture was uniformly mixed and stirred to adjust the concentration to 3%. Paper making tank 3 (for back layer) 100 parts of newspaper waste paper was put into a stirring tank, water was added, and the mixture was uniformly mixed and stirred to adjust the concentration to 3%.
【００１５】各層間の重量比が、表層23％、中層42％、
裏層35％となるように抄造し、原紙の全重量当たりの赤
リン1.７重量％を含む、坪量 230ｇ／m2の石膏ボード用
原紙を得た。表層は、パルプ９6.４重量部、ロジンサイ
ズ0.６重量部、硫酸バンド3.０重量部からなり、中層
は、パルプ９0.０６重量部、赤リン4.１４重量部、ロジ
ンサイズ0.６重量部、硫酸バンド5.２重量部からなり、
裏層は、パルプ１００重量％からなる組成とした。 〔実施例２〕粒径が50μでマイクロカプセル化したリン
酸一アンモニウムを全層に、均一に、混抄させた石膏ボ
ード用原紙を抄造した。 抄紙槽１（表層用） 製紙用木材パルプ80部及び新聞古紙20部、これらの合計
100 部に対し、リン酸一アンモニウム11.6部、ロジンサ
イズ剤0.7 部、硫酸バンド3.5 部を攪拌槽に仕込み水を
加えて均一に混合攪拌し、3 ％の濃度に調節した。 抄紙槽２（中層用） 製紙用木材パルプ30部及び新聞古紙70部、これらの合計
100 部に対し、リン酸一アンモニウム11.9部、ロジンサ
イズ0.7 部、硫酸バンド6.2 部を攪拌槽に仕込み水を加
えて均一に混合攪拌し、3 ％の濃度に調節した。 抄紙槽３（裏層用） 新聞古紙100 部に対しリン酸一アンモニウム11.1部を攪
拌槽に仕込み水を加えて均一に混合攪拌し、3 ％の濃度
に調節した。The weight ratio between the layers is such that the surface layer is 23%, the middle layer is 42%,
The backing layer was made into 35% to obtain a gypsum board base paper having a basis weight of 230 g / m 2 and containing 1.7% by weight of red phosphorus based on the total weight of the base paper. The surface layer is composed of 96.4 parts by weight of pulp, 0.6 parts by weight of rosin and 3.0 parts by weight of sulfuric acid band, and the middle layer is 9.06 parts by weight of pulp, 4.14 parts by weight of red phosphorus, and 0.6 part by weight of rosin. 6 parts by weight, 5.2 parts by weight of sulfuric acid band,
The back layer had a composition of 100% by weight pulp. Example 2 A base paper for gypsum board was made by uniformly mixing all layers of monoammonium phosphate having a particle size of 50 μ and microencapsulated. Papermaking tank 1 (for surface layer) 80 parts of wood pulp for papermaking and 20 parts of waste newspaper, total of these
With respect to 100 parts, 11.6 parts of monoammonium phosphate, 0.7 part of rosin sizing agent, and 3.5 parts of sulfuric acid band were charged into a stirring tank, water was added, and the mixture was uniformly mixed and stirred to adjust the concentration to 3%. Papermaking tank 2 (for middle layer) 30 parts of wood pulp for papermaking and 70 parts of newspaper waste paper, total of these
With respect to 100 parts, 11.9 parts of monoammonium phosphate, 0.7 part of rosin size, and 6.2 parts of sulfuric acid band were charged into a stirring tank, water was added, and the mixture was uniformly mixed and stirred to adjust the concentration to 3%. Paper making tank 3 (for backing layer) 11.1 parts of monoammonium phosphate was charged into a stirring tank for 100 parts of newspaper waste paper, water was added, and the mixture was uniformly mixed and stirred to adjust the concentration to 3%.
【００１６】各層間の重量比が、表層24％、中層45％、
裏層31％となるように抄造し、原紙の全重量当たりリン
分として2.７重量％（リン酸一アンモニウムとして混抄
量１0.０重量％）を含む坪量230 ｇ／m2の石膏ボード用
原紙を得た。表層は、可燃性パルプ８6.４重量部、リン
酸一アンモニウム１0.０重量部、ロジンサイズ0.６重量
部、硫酸バンド3.０重量部からなり、中層は、可燃性パ
ルプ８4.２重量部、リン酸一アンモニウム１0.０重量
部、ロジンサイズ0.６重量部、硫酸バンド5.２重量部か
らなり、さらに裏層が、可燃性パルプ９0.０重量部、リ
ン酸一アンモニウム１0.０重量部からなる組成とした。 〔比較例１〕リン系難燃剤を混抄しない他は、実施例１
と同じ方法で石膏ボード用原紙を抄造し、坪量２３０ｇ
／m2の石膏ボード用原紙を得た。The weight ratio between the layers is such that the surface layer is 24%, the middle layer is 45%,
Gypsum board with a basis weight of 230 g / m 2 that is made into a paper with a backing layer of 31% and contains 2.7% by weight of phosphorus as the total weight of the base paper (mixed amount of 10.0% by weight as monoammonium phosphate). I got the base paper. The surface layer consists of combustible pulp 86.4 parts by weight, monoammonium phosphate 10.0 parts by weight, rosin size 0.6 parts by weight, sulfuric acid band 3.0 parts by weight, and the middle layer is combustible pulp 84.2 parts by weight. Parts, monoammonium phosphate 10.0 parts by weight, rosin size 0.6 parts by weight, sulfuric acid band 5.2 parts by weight, and further the backing layer comprises 90.0 parts by weight of combustible pulp, monoammonium phosphate 10. The composition was 0 part by weight. [Comparative Example 1] Example 1 except that the phosphorus-based flame retardant was not mixed.
Paper for gypsum board is made by the same method as above, and the basis weight is 230 g.
A base paper for gypsum board of / m 2 was obtained.
【００１７】実施例１及び２、比較例１で得た石膏ボー
ド用原紙のそれぞれと、普通の石膏ボード用原紙（坪量
230ｇ／m2）を組み合わせ、その間に、焼石膏 100部、
水130 部、凝結促進剤（硫酸カリウム）0.5 部、アルキ
ルベゼンスルフォン酸ナトリウム0.1 部、ＰＶＡ３部を
混合した石膏スラリーを流し込んで、厚さ12mm、比重0.
55の軽量石膏ボード（重量6.６kg／m2）を製造した。そ
して、それぞれの石膏ボードについて建設省公示第１８
２８号に指定する基材試験と表面試験を行なった。Each of the base papers for gypsum board obtained in Examples 1 and 2 and Comparative Example 1 and an ordinary base paper for gypsum board (basis weight)
230 g / m 2 ) in between, 100 parts of calcined gypsum,
A gypsum slurry containing 130 parts of water, 0.5 part of a setting accelerator (potassium sulfate), 0.1 part of sodium alkylbezensulfonate, and 3 parts of PVA is poured into the mixture to a thickness of 12 mm and a specific gravity of 0.
55 lightweight gypsum boards (weight 6.6 kg / m 2 ) were produced. And about each gypsum board, Ministry of Construction notification 18th
The base material test and surface test specified in No. 28 were conducted.
【００１８】表−１にその結果を示す。 表−１ ──────────────────────────── 使用原紙 基材試験 表面試験 不燃材料合否判定 ──────────────────────────── 実施例１ 合 格 合 格 合 格 実施例２ 合 格 合 格 合 格 比較例１ 不合格 不合格 不合格 ──────────────────────────── 注：不燃材料の合否判定基準は建設省告示１８２８号による。The results are shown in Table-1. Table-1 ──────────────────────────── Used base paper Base material test Surface test Non-combustible material pass / fail judgment ──────── ──────────────────── Example 1 Cases Cases Cases Cases 2 Cases Cases Cases Cases Cases Comparative Examples 1 Fail Fail Fail ─── ───────────────────────── Note: The acceptance criteria for non-combustible materials are based on Ministry of Construction Notification No. 1828.
【００１９】本発明のリン系難燃剤が混抄された難燃性
の石膏ボード用原紙は、石膏ボードの防火性能の向上に
大きく寄与し、本発明の難燃性の石膏ボード用原紙を石
膏ボードに使用すると、厚さ12mm、比重0.55の軽量石膏
ボード（重量6.６kg／m2）でも建設省が定める不燃材料
の条件に適合した。The base paper for flame-retardant gypsum board mixed with the phosphorus-based flame retardant of the present invention greatly contributes to the improvement of the fireproof performance of the gypsum board, and the base paper for flame-retardant gypsum board of the present invention is a gypsum board. When used as a material, a lightweight gypsum board with a thickness of 12 mm and a specific gravity of 0.55 (weight 6.6 kg / m 2 ) complied with the requirements for non-combustible materials specified by the Ministry of Construction.
【図１】本発明の難燃性の石膏ボード用原紙の拡大横断
面図である。 １ 表層 ２ 中層 ３ 裏層FIG. 1 is an enlarged cross-sectional view of a flame-retardant gypsum board base paper of the present invention. 1 surface layer 2 middle layer 3 back layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｅ０４Ｂ 1/94 Ｒ 7521−2Ｅ (72)発明者 横山 至 埼玉県草加市瀬崎町1369−７ (72)発明者 仲畠 忠志 東京都足立区江北４−24─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Internal reference number FI Technical indication location E04B 1/94 R 7521-2E (72) Inventor Toru Yokoyama 1369-7 Sezaki-cho, Soka-shi, Saitama ( 72) Inventor Tadashi Nakahata 4-24 Kohoku, Adachi-ku, Tokyo
Claims (4)
徴とする難燃性石膏ボード用原紙。1. A base paper for a flame-retardant gypsum board, characterized by containing a phosphorus-based flame retardant mixed therein.
からなり、リン系難燃剤が該表層、中層及び裏層の少な
くとも１層に混抄されている請求項１記載の難燃性石膏
ボード用原紙。2. The flame-retardant gypsum board according to claim 1, wherein the gypsum board base paper comprises a surface layer, a middle layer and a back layer, and a phosphorus-based flame retardant is mixed in at least one of the surface layer, the middle layer and the back layer. Raw paper.
ム、リン酸二アンモニウム、ポリリン酸アンモニウム、
赤リン、及びこれらの混合物からなる群より選ばれた請
求項１又は２記載の難燃性石膏ボード用原紙。3. The phosphorus-based flame retardant is monoammonium phosphate, diammonium phosphate, ammonium polyphosphate,
The flame-retardant gypsum board base paper according to claim 1, which is selected from the group consisting of red phosphorus and a mixture thereof.
ボード用原紙を、片面又は両面に有する石膏ボード。4. A gypsum board having the gypsum board base paper according to any one of claims 1 to 3 on one side or both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32421892A JPH06171008A (en) | 1992-12-03 | 1992-12-03 | Fire-retardant gypsum board and base board therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32421892A JPH06171008A (en) | 1992-12-03 | 1992-12-03 | Fire-retardant gypsum board and base board therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06171008A true JPH06171008A (en) | 1994-06-21 |
Family
ID=18163367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32421892A Pending JPH06171008A (en) | 1992-12-03 | 1992-12-03 | Fire-retardant gypsum board and base board therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06171008A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2263986A1 (en) * | 1997-08-21 | 2010-12-22 | United States Gypsum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
| WO2014208226A1 (en) * | 2013-06-24 | 2014-12-31 | 吉野石膏株式会社 | Sizing defect detection system and sizing defect detection method |
| JP2022061892A (en) * | 2020-10-07 | 2022-04-19 | 株式会社ラ・ポルタ | Incombustible magnetic panel, and manufacturing method of the same |
| WO2022259785A1 (en) * | 2021-06-07 | 2022-12-15 | 吉野石膏株式会社 | Latent heat storage gypsum board and partition structure |
-
1992
- 1992-12-03 JP JP32421892A patent/JPH06171008A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2263986A1 (en) * | 1997-08-21 | 2010-12-22 | United States Gypsum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
| WO2014208226A1 (en) * | 2013-06-24 | 2014-12-31 | 吉野石膏株式会社 | Sizing defect detection system and sizing defect detection method |
| JPWO2014208226A1 (en) * | 2013-06-24 | 2017-02-23 | 吉野石膏株式会社 | Gluing failure detection system and gluing failure detection method |
| US9651500B2 (en) | 2013-06-24 | 2017-05-16 | Yoshino Gypsum Co., Ltd. | Sizing defect detection system and sizing defect detection method |
| JP2022061892A (en) * | 2020-10-07 | 2022-04-19 | 株式会社ラ・ポルタ | Incombustible magnetic panel, and manufacturing method of the same |
| WO2022259785A1 (en) * | 2021-06-07 | 2022-12-15 | 吉野石膏株式会社 | Latent heat storage gypsum board and partition structure |
| JPWO2022259785A1 (en) * | 2021-06-07 | 2022-12-15 | ||
| CN117412939A (en) * | 2021-06-07 | 2024-01-16 | 吉野石膏株式会社 | Latent heat storage gypsum board, partition structure |
| US12492330B2 (en) | 2021-06-07 | 2025-12-09 | Yoshino Gypsum Co., Ltd. | Latent heat storage gypsum board and partition structure |
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