JP2000117882A - Gypsum board and manufacture thereof - Google Patents
Gypsum board and manufacture thereofInfo
- Publication number
- JP2000117882A JP2000117882A JP28844698A JP28844698A JP2000117882A JP 2000117882 A JP2000117882 A JP 2000117882A JP 28844698 A JP28844698 A JP 28844698A JP 28844698 A JP28844698 A JP 28844698A JP 2000117882 A JP2000117882 A JP 2000117882A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- board
- water
- base paper
- boric acid
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は石膏ボード及びその
製造方法に関する。[0001] The present invention relates to a gypsum board and a method for producing the same.
【０００２】[0002]
【従来の技術】石膏ボードは、石膏を芯材にして表面を
ボード用原紙で覆った不燃性の建築材料で、主として建
築物における壁や天井等の内装材として幅広く使用され
ている。ところが、その取り扱いにおいて、石膏芯材と
ボード用原紙が剥離するという問題が多々生じている。
従来、石膏芯材とボード原紙の接合は、石膏ボードを製
造する際に、β半水石膏を主成分とするスラリーをボー
ド用原紙間に直接流し込み、成形、硬化させることによ
り行っている。2. Description of the Related Art A gypsum board is a non-combustible building material in which gypsum is used as a core material and its surface is covered with board base paper, and is widely used as an interior material such as walls and ceilings in buildings. However, there are many problems that the gypsum core material and the base paper for board peel off during the handling.
2. Description of the Related Art Conventionally, when a gypsum board is manufactured, a gypsum core material and a board base paper are joined by directly pouring a slurry containing β-hemihydrate gypsum as a main component between base board papers, molding and curing.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記した従
来の石膏ボードは、なお改良されるべき点も多々残され
ている。例えば、石膏芯材とボード原紙の接着性が必ず
しも十分とはいえない。又、石膏基材の軽量化と基材強
度の向上がある。However, the above-mentioned conventional gypsum board still has many points to be improved. For example, the adhesion between the gypsum core material and the board base paper is not always sufficient. Further, there is a reduction in the weight of the gypsum base and an improvement in the strength of the base.
【０００４】一般的に製造されているβ半水石膏を用い
た石膏ボードの製造において、ボード原紙との接着力の
向上技術として水性エマルジョンと焼石膏との混合スラ
リーをボード用原紙の接着層に予め塗布する方法（特開
昭４２ー２７６７９号公報）。石膏を含ませたボード原
紙、珪酸又は珪酸塩を含ませたボード原紙を用いる方法
（特開昭５０−２７８１５号公報）。石膏ボードを製造
するに当たり硫酸カリ塩をボード原紙に含ませ、可溶性
燐酸塩を石膏スラリーに含ませ両者の接着性を向上させ
たものを使用することを特徴とし、この両者を接着させ
る石膏ボードの製造方法（公開特許公報 昭５４−９６
５２５号公報）等の技術が開示されている。しかし従来
の技術では必ずしも充分な接着性は得られておらず、又
石膏ボードの性能において、強度、耐水性共必ずしも満
足するものではない。特に湿式燐酸を製造する際に副生
する燐酸副生α半水石膏を用い、従来技術による石膏ボ
ードの製造は、ボード原紙との接着がほとんどなされ
ず、実用化されていない。[0004] In the production of gypsum board using generally manufactured β-hemihydrate gypsum, a mixed slurry of an aqueous emulsion and calcined gypsum is used as an adhesive layer of the board base paper as a technique for improving the adhesive strength with the board base paper. A method of coating in advance (JP-A-42-27679). A method using board base paper containing gypsum and board base paper containing silicic acid or silicate (Japanese Patent Laid-Open No. 50-27815). In producing gypsum board, potassium sulfate is contained in the board base paper, soluble phosphate is contained in the gypsum slurry to improve the adhesion between the two, and a gypsum board is used for bonding the two. Manufacturing Method (Publication Patent Publication No. 54-96)
No. 525) is disclosed. However, the conventional technology does not always provide sufficient adhesiveness, and the strength and water resistance of the gypsum board are not always satisfactory. In particular, the production of gypsum board according to the prior art using gamma gypsum by-produced phosphoric acid as a by-product when producing wet phosphoric acid hardly adheres to board base paper and has not been put to practical use.
【０００５】一方、α半水石膏を用いて、ボード原紙に
α半水石膏を塗布することにより接着性を向上させ、安
価で高強度、高耐水性の石膏ボードを製造する方法（特
願平３７９６００３５号公報）が提案されているが、α
半水石膏をボード原紙に塗布した後に長時間の養生が必
要であり生産性が極めて悪い欠点を有している。On the other hand, a method of manufacturing an inexpensive, high-strength, and highly water-resistant gypsum board by applying α-hemihydrate gypsum to board base paper using α-hemihydrate gypsum to improve the adhesiveness (Japanese Patent Application No. Hei 10-260,075). 37960035) has been proposed, but α
After applying the hemihydrate gypsum to the board base paper, a long curing time is required, and the productivity is extremely low.
【０００６】一方、用いられる原料石膏の種類には実製
造面において、ある程度制約されているのが現実であ
る。例えば、湿式燐酸製造法により燐酸を製造する際に
副生するα半水石膏は、凝結時間、水和速度、ボード原
紙との接着性、製品のソリ等の問題から安価ではあるが
使用されているのは極限られた条件範囲である。On the other hand, the kind of raw gypsum used is actually restricted to some extent in terms of actual production. For example, α-hemihydrate gypsum by-produced when producing phosphoric acid by a wet phosphoric acid production method is used although it is inexpensive due to problems such as setting time, hydration speed, adhesiveness to board base paper, and product warpage. Are in a very limited range of conditions.
【０００７】[0007]
【課題を解決するための手段】本発明は、水溶性高分子
と、硼砂及び／又は硼酸をボード原紙及び／又は石膏芯
材に含有することにより、ボード原紙と石膏芯材の接着
性が極めて良く、経済性に優れた石膏ボードが得られる
のである。SUMMARY OF THE INVENTION The present invention provides a board base paper and / or gypsum core material containing a water-soluble polymer and borax and / or boric acid, thereby achieving an extremely high adhesion between the board base paper and the gypsum core material. A good and economical gypsum board can be obtained.
【０００８】即ち、本発明は水溶性高分子を含有するボ
ード原紙と、硼砂及び／又は硼酸を含有する石膏芯材か
らなる石膏ボード、又は硼砂及び／又は硼酸を含有する
ボード原紙と、水溶性高分子を含有する石膏芯材からな
る石膏ボードに関する。That is, the present invention relates to a board base paper containing a water-soluble polymer, a gypsum board made of a gypsum core material containing borax and / or boric acid, or a board base paper containing borax and / or boric acid; The present invention relates to a gypsum board made of a gypsum core material containing a polymer.
【０００９】[0009]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明に用いる水溶性高分子は、特に限定するものでは
なく、以下のようなものが用いられる。例えば、ばれい
しょデンプン、タピオカデンプン、小麦デンプン、コー
ンスターチ等のデンプン質系、及び、にかわ、ゼラチ
ン、カゼイン等のタンパク質系などの天然高分子、ある
いは、メチルセルロース（ＭＣ）、エチルセルロース
（ＥＣ）、ヒドロキシエチルセルロース（ＨＥＣ）、カ
ルボキシメチルセルロース（ＣＭＣ）等のセルロース
系、ポリビニルアルコール（ポバール）、ポリアクリル
酸ナトリウム、ポリエチレンオキシド等の合成品等であ
る。これら水溶性高分子の中でも、ポリビニルアルコー
ル（以下ＰＶＡと称す）が特に好ましい。ＰＶＡの一般
的な用途として、乳化安定剤、接着剤、紙加工、繊維経
糸糊剤、繊維仕上加工等に用いられているものならなん
でもよい。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The water-soluble polymer used in the present invention is not particularly limited, and the following are used. For example, natural polymers such as starch starch, tapioca starch, wheat starch, corn starch, etc., and protein systems such as glue, gelatin, casein, or methylcellulose (MC), ethylcellulose (EC), hydroxyethylcellulose ( HEC), carboxymethylcellulose (CMC) and the like, and synthetic products such as polyvinyl alcohol (Poval), sodium polyacrylate, and polyethylene oxide. Among these water-soluble polymers, polyvinyl alcohol (hereinafter referred to as PVA) is particularly preferred. As a general use of PVA, any material may be used as long as it is used for emulsion stabilizers, adhesives, paper processing, fiber warp sizing agents, fiber finishing and the like.
【００１０】中でも好ましくは、水に対する溶解性、ボ
ード原紙への塗布性、被膜強度、吸湿性等の問題から、
重合度及び、けん化度の低いＰＶＡが望ましい。具体的
には、重合度が５００〜２２００程度、鹸化度８０〜９
０モル％が好ましく、これらを例示すれば、ＰＶＡ−２
０５、ＰＶＡ−２１７、ＰＶＡ−２１７Ｅ、ＰＶＡ−２
２０等が挙げられる。用いる濃度は鹸化度、重合度にも
よるが１〜１０重量％の水溶液が好ましい。ボード原紙
へ含有させる方法は特に限定するものではないが、ＰＶ
Ａは製紙工程において含浸させてもよいし、ボード原紙
に塗布させてもよい。塗布方法は通常、５重量％ＰＶＡ
水溶液を石膏ボード原紙の裏面（石膏芯材との接着面）
に対し、５〜１００ｇ／９００ｍ2（固形分：０．２５
〜５ｇ）を塗布し、乾燥処理を行った原紙を用いる。[0010] Among them, preferred are problems such as solubility in water, applicability to board base paper, film strength, and hygroscopicity.
PVA having a low degree of polymerization and a low degree of saponification is desirable. Specifically, the polymerization degree is about 500-2200, and the saponification degree is 80-9.
0 mol% is preferred, and for example, PVA-2
05, PVA-217, PVA-217E, PVA-2
20 and the like. The concentration used depends on the degree of saponification and the degree of polymerization, but an aqueous solution of 1 to 10% by weight is preferred. There is no particular limitation on the method of incorporation into board base paper.
A may be impregnated in the papermaking process or may be applied to board base paper. The coating method is usually 5% by weight PVA
Apply the aqueous solution to the back side of gypsum board base paper (adhesive surface with gypsum core material)
5 to 100 g / 900 m 2 (solid content: 0.25
５5 g), and a dried base paper is used.
【００１１】本発明に用いる硼砂及び／又は硼酸は、適
度な濃度の水溶液として用いることができる。ＰＶＡに
対し極めて少量で増粘、ゲル化を起こす。さらに詳しく
は、１〜１０重量％水溶液として用いるのが好ましい。
本発明に用いる硼酸は、メタ硼酸、オルト硼酸、四硼酸
などがあり、いずれも適度な濃度の水溶液として用いる
ことができる。The borax and / or boric acid used in the present invention can be used as an aqueous solution having an appropriate concentration. A very small amount with respect to PVA causes thickening and gelation. More specifically, it is preferably used as a 1 to 10% by weight aqueous solution.
The boric acid used in the present invention includes metaboric acid, orthoboric acid and tetraboric acid, and any of them can be used as an aqueous solution having an appropriate concentration.
【００１２】本発明に用いる石膏は、β半水石膏または
β半水石膏とα半水石膏との混合された石膏であっても
特に限定するものではない。従来α半水石膏に於いて
は、その製造方法によって、非常にコストが高くなり実
用的でない場合がある。例えば、天然石膏や排煙脱硫酸
石膏等の二水石膏をオートクレイブを用いた加圧水溶液
法、あるいは加圧水溶液で低反応温度・短反応時間の条
件下において脱水して製造するα型半水石膏であり、一
般的な石膏ボードの製造方法には用いられていない。一
方、火成岩性燐鉱石と硫酸を用いて、湿式燐酸製造法に
より燐酸を製造する際に副生するα半水石膏は、安価で
はあるが、混水量が高い、凝結時間が不安定、水和速度
が遅い等の基本性能に欠点を有し一般的な石膏ボードに
は用いられていないのが現状である。The gypsum used in the present invention is not particularly limited, even if it is β-hemihydrate gypsum or gypsum mixed with β-hemihydrate gypsum and α-hemihydrate gypsum. Conventional α-hemihydrate gypsum may be extremely expensive and impractical depending on the production method. For example, α-type hemihydrate gypsum produced by dehydration of gypsum such as natural gypsum or flue gas desulfurization gypsum by using a pressurized aqueous solution method using an autoclave, or dehydration with a pressurized aqueous solution under conditions of low reaction temperature and short reaction time And it is not used in a general method for producing gypsum board. On the other hand, α-hemihydrate gypsum by-produced when producing phosphoric acid by wet phosphoric acid production using igneous phosphate rock and sulfuric acid is inexpensive, but has a high water mixture, unstable setting time, and hydrated water. At present, it is not used for general gypsum boards because of its drawbacks in basic performance such as low speed.
【００１３】しかし、本発明によるボード原紙を用いる
ことにより、火成岩性燐鉱石と硫酸を用いて、湿式燐酸
製造法により燐酸を製造する際に副生するα半水石膏を
用いて石膏ボードを製造することが可能となる。前に述
べたように、本α半水石膏は、一般的なα半水石膏に比
し、混水量がやや高く、凝結時間の不安定さという欠点
はあるものの、凝結時間の安定化や水和促進を目的にア
ルカリを添加することによりボードへの使用が一部可能
である。例えば、特開平８−３４７４５３公報により、
β半水石膏との５０重量％までの混合使用技術は提唱さ
れている。本発明による、ＰＶＡ塗布されたボード原紙
を用いることにより、α半水石膏の混合割合を上げるこ
とが可能となる。即ち、β半水石膏と混合使用される湿
式燐酸製造時に副生するα半水石膏の混合割合は０〜７
０重量％まで可能となる。However, by using the board base paper according to the present invention, a gypsum board is produced using igneous phosphate rock and sulfuric acid, and α-hemihydrate gypsum by-produced when producing phosphoric acid by a wet phosphoric acid production method. It is possible to do. As described above, the α-hemihydrate gypsum has a relatively high mixing amount of water compared to general α-hemihydrate gypsum, and has the disadvantages of instability of the setting time. A board can be partially used by adding an alkali for the purpose of promoting harmony. For example, according to JP-A-8-347453,
Techniques for mixed use with up to 50% by weight of gypsum with beta hemihydrate have been proposed. By using the base paper coated with PVA according to the present invention, the mixing ratio of α-hemihydrate gypsum can be increased. That is, the mixing ratio of α-hemihydrate gypsum by-produced during the production of wet phosphoric acid mixed with β-hemihydrate gypsum is 0-7.
Up to 0% by weight is possible.
【００１４】本発明に於いて、硼砂及び／又は硼酸とＰ
ＶＡを反対に添加しても同様の効果を得ることが可能で
ある。即ち、ボード原紙に、硼砂及び／又は硼酸の水溶
液を塗布し、石膏芯材へＰＶＡを添加し用いても何ら支
障はない。塗布方法は通常、５重量％硼砂水溶液を石膏
ボード原紙の裏面（石膏芯材との接着面）に対し、５〜
１００ｇ／９００ｍ2（固形分：０．２５〜５ｇ）を塗
布し、乾燥処理を行った原紙を用いる。石膏芯材へＰＶ
Ａを添加する場合は、通常ＰＶＡ固形分が石膏１００ｇ
に対し、０．１〜５ｇになるように調整を行う。In the present invention, borax and / or boric acid and P
The same effect can be obtained by adding VA in the opposite manner. That is, there is no problem even if an aqueous solution of borax and / or boric acid is applied to the board base paper and PVA is added to the gypsum core and used. The coating method is usually 5 to 5% by weight borax aqueous solution on the back side of the gypsum board base paper (adhesion surface with the gypsum core material).
A base paper coated with 100 g / 900 m 2 (solid content: 0.25 to 5 g) and dried is used. PV to gypsum core
When A is added, the PVA solid content is usually 100 g of gypsum.
Is adjusted to be 0.1 to 5 g.
【００１５】本石膏ボードの製造方法における乾燥工程
中において、石膏ボードの品温は６０℃以上、１００℃
以下が好ましく、さらに好ましくは、６５〜８０℃であ
る。乾燥時間は、一般的な熱風循環式乾燥機であれば、
例えば、乾燥機内の熱風温度が１４０℃〜１６０℃であ
れば、２０分〜６０分が望ましく、さらに好ましくは３
０分〜５０分である。品温が６０℃以下となる乾燥条件
の場合、乾燥時間が長くなり生産性に大きく支障を来す
とともに、石膏ボードの品質低下の原因となる。又、品
温が１００℃以上となる条件では、ボードが過乾燥状態
となり、石膏ボード芯材とボード原紙との接着不良の原
因となる。[0015] During the drying step in the gypsum board manufacturing method, the temperature of the gypsum board is 60 ° C or higher and 100 ° C or higher.
The following is preferred, and more preferably 65 to 80 ° C. Drying time is a general hot air circulation type dryer,
For example, if the hot air temperature in the dryer is 140 ° C. to 160 ° C., it is preferably 20 minutes to 60 minutes, and more preferably 3 minutes.
0 to 50 minutes. In the case of the drying condition in which the product temperature is 60 ° C. or less, the drying time becomes longer, which greatly impairs the productivity and causes the quality of the gypsum board to deteriorate. On the other hand, under conditions where the product temperature is 100 ° C. or higher, the board is in an over-dried state, which causes poor adhesion between the gypsum board core material and the board base paper.
【００１６】[0016]
【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。また、部
または％は特記しないかぎり重量部または重量％を表
す。 実施例１ ボード原紙（日本板紙）の表用、裏用それぞれの裏面
（石膏芯材との接着面）、９００ｃｍ2に対し、クラレ
ポバール（ＰＶＡ−２０５）の５％水溶液６０部（固形
分：３部）を塗布し、３０℃の熱風循環式乾燥機にて３
時間乾燥処理を行い、本発明のボード原紙を得た。この
うち、裏用ボード原紙を幅２５ｃｍ×１５ｃｍ、厚み
１．２ｃｍの上部解放の箱型を作成し、次に示す石膏ス
ラリーを流し込み、上から表紙を被せ一体化し、ロール
で軽く圧締し、１５０℃、３０分乾燥後処理したのち取
り出し、密度０．６７８ｇ／ｃｍ3の石膏ボードを得
た。用いた石膏芯材は、β半水石膏１００部に、５％硼
砂水溶液７０部、泡剤（花王株式会社製 Ｄ−３Ｄ）
０．８部、減水剤（日本製紙株式会社製 ビスパーズ２
１５Ｇ）１．３部を加えミキサーで攪拌したスラリーで
ある。The present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to the following examples unless it exceeds the gist. Parts and% represent parts by weight or% by weight unless otherwise specified. Example 1 60 parts of a 5% aqueous solution of Kuraray Povar (PVA-205) (solids content: 900 cm 2 ) for each of the front and back sides of the board base paper (Nippon Paperboard) (the bonding surface with the gypsum core material) and 900 cm 2. 3 parts) and apply it in a hot air circulation dryer at 30 ° C.
Drying treatment was performed for a time to obtain a board base paper of the present invention. Of these, the backing board base paper was made into a box shape of 25 cm × 15 cm wide and 1.2 cm thick with an open top, the following plaster slurry was poured, the cover was overlaid and integrated, and lightly pressed with a roll, After drying and drying at 150 ° C. for 30 minutes, the gypsum board having a density of 0.678 g / cm 3 was obtained. The gypsum core material used was 100 parts of β hemihydrate gypsum, 70 parts of a 5% borax aqueous solution, and a foaming agent (D-3D manufactured by Kao Corporation).
0.8 parts, water reducing agent (Vispers 2 manufactured by Nippon Paper Industries, Ltd.)
15G) A slurry obtained by adding 1.3 parts and stirring with a mixer.
【００１７】実施例２ 実施例１のＰＶＡと硼砂を入れ替えた。即ち、ボード原
紙（日本板紙）の表用、裏用それぞれの裏面（石膏芯材
との接着面）、９００ｃｍ2に対し、硼砂の５％水溶液
６０部（固形分：３部）を塗布し、３０℃の熱風循環式
乾燥機にて３時間乾燥処理を行い、本発明のボード原紙
を得た。このうち、裏用ボード原紙を幅２５ｃｍ×１５
ｃｍ、厚み１．２ｃｍの上部解放の箱型を作成紙し、次
に示す石膏スラリーを流し込み、上から表紙を被せ一体
化し、ロールで軽く圧締し、１５０℃、３０分乾燥後処
理したのち取り出し、密度０．６８４ｇ／ｃｍ3の石膏
ボードを得た。用いた石膏芯材は、β半水石膏１００部
に、５％ＰＶＡ水溶液７０部、泡剤０．８ 部、減水剤
１．３部を加えミキサーで攪拌したスラリーであるExample 2 The PVA of Example 1 was replaced with borax. That is, 60 parts (solid content: 3 parts) of a 5% aqueous solution of borax was applied to 900 cm 2 of the back surface (bonding surface with the gypsum core material) of the front and back sides of the board base paper (Nippon Paperboard). Drying treatment was performed for 3 hours using a hot air circulating dryer at 30 ° C. to obtain a board base paper of the present invention. Of these, the backing board base paper is 25 cm wide x 15 cm.
cm, 1.2 cm thick box-shaped top open paper, poured the following gypsum slurry, cover and integrate from above, lightly pressed with a roll, dried at 150 ° C for 30 minutes, and then processed The gypsum board having a density of 0.684 g / cm 3 was obtained. The gypsum core material used was a slurry obtained by adding 70 parts of a 5% PVA aqueous solution, 0.8 parts of a foaming agent, and 1.3 parts of a water reducing agent to 100 parts of β-hemihydrate gypsum and stirring with a mixer.
【００１８】比較例１ 実施例１のボード原紙（日本板紙）の裏面（石膏芯材と
の接着面）を無処理とした以外は実施例１と同様の操作
を行い、密度０．６８５ｇ／ｃｍ3の石膏ボードを得
た。Comparative Example 1 The same operation as in Example 1 was carried out except that the back surface of the board base paper (Nippon Paperboard) (the surface to be bonded to the gypsum core material) was not treated, and the density was 0.685 g / cm. 3 plaster boards were obtained.
【００１９】比較例２ 実施例２に於ける石膏芯材の５％ＰＶＡ水溶液７０部
を、水７０部とした以外は、実施例２と同様の操作を行
い、密度０．６８４ｇ／ｃｍ3の石膏ボードを得た。Comparative Example 2 The same operation as in Example 2 was performed except that 70 parts of water was used instead of 70 parts of a 5% aqueous solution of gypsum core material in Example 2 to obtain a density of 0.684 g / cm 3 . A gypsum board was obtained.
【００２０】[0020]
【表１】 [Table 1]
【００２１】＜評価方法＞ １）ボード密度 試験片作成後（５０ｍｍ×５０ｍｍ）通風のよい室内で
７日間以上保存した状態で測定。 ２）原紙との接着性 判定基準 ○：９０％以上 △：６０％以上 ９０％未満 ×：６０％以下 ３）曲げ強度 ＪＩＳ Ｒ ９１１２に準拠して行った。試験片（３０
０×４００ｍｍ）を曲げ強度用試験機（丸菱科学機械製
作所ＧＢＬ−５００）の支持部（幅３５０ｍｍ）に置
き、ボードの中心部に懸架部を合わせ、懸架部を２５０
Ｎ／ｍｉｎで加圧する。ボードが割れたときの力を曲げ
強度とする。<Evaluation Method> 1) Board Density After the test piece was prepared (50 mm × 50 mm), it was measured in a room with good ventilation for at least 7 days. 2) Adhesion to base paper Judgment criteria ○: 90% or more △: 60% or more and less than 90% ×: 60% or less 3) Flexural strength This was performed in accordance with JIS R 9112. Test piece (30
0 × 400 mm) is placed on the support (350 mm in width) of a bending strength tester (Marubishi Scientific Machinery Co., Ltd. GBL-500), the suspension is aligned with the center of the board, and the suspension is 250 mm.
Pressurize at N / min. The force when the board breaks is defined as the bending strength.
【００２２】[0022]
【発明の効果】本発明は、水溶性高分子と、硼砂及び／
又は硼酸をボード原紙又は石膏芯材に含有することによ
り、従来技術では達成されなかった、石膏ボード原紙と
石膏芯材の接着性の向上、高強度化、軽量化等高品質の
石膏ボードを得ることを可能にした。According to the present invention, a water-soluble polymer, borax and / or
Or by containing boric acid in board base paper or gypsum core material, to obtain high-quality gypsum board, such as improvement in adhesion between gypsum board base paper and gypsum core material, high strength, and weight reduction, which were not achieved by the conventional technology. Made it possible.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森清 幸治 山口県下関市彦島迫町七丁目１番１号 三 井化学株式会社内 (72)発明者 大深 直俊 山口県下関市彦島迫町七丁目１番１号 三 井化学株式会社内 Ｆターム(参考） 4F100 AA02B AE06B AK01A AK01C AK21A AK21C BA02 BA03 BA06 BA10A BA10C BA13 DG10A DG10C EH132 EJ862 JB09A JB09C JK06 4G012 MB41 PB05 PB29 PC01 PC03 PC11 PC12 4G052 AB02 AB42 AC06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Morizuki 7-1-1, Hikoshimasako-cho, Shimonoseki-shi, Yamaguchi Prefecture Inside of Mitsui Chemicals, Inc. 1-1-1, Mitsui Chemicals, Inc. F-term (reference) 4F100 AA02B AE06B AK01A AK01C AK21A AK21C BA02 BA03 BA06 BA10A BA10C BA13 DG10A DG10C EH132 EJ862 JB09A JB09C JK06 4G05 AB41 PC41
Claims (7)
と、硼砂及び／又は硼酸を含有する石膏芯材からなる石
膏ボード。1. A gypsum board comprising a board base paper containing a water-soluble polymer and a gypsum core containing borax and / or boric acid.
原紙と、水溶性高分子を含有する石膏芯材からなる石膏
ボード。2. A gypsum board comprising a board base paper containing borax and / or boric acid and a gypsum core material containing a water-soluble polymer.
子が塗布又は含浸されたボード原紙と、硼砂及び／又は
硼酸を含有する石膏芯材からなる石膏ボード。3. A gypsum board comprising a board base paper having a water-soluble polymer applied or impregnated on a surface to be bonded to a gypsum core, and a gypsum core containing borax and / or boric acid.
又は硼酸が塗布又は含浸されたボード原紙と、水溶性高
分子を含有する石膏芯材からなる石膏ボード。4. A borax and / or porcelain on a surface to be bonded to a gypsum core material.
Alternatively, a gypsum board comprising a board base paper coated or impregnated with boric acid, and a gypsum core material containing a water-soluble polymer.
用いた下部用ボード原紙上に、硼砂及び／又は硼酸を含
有する石膏芯材を流し込み、その上から水溶性高分子を
含有する上部用ボード原紙をかぶせ一体化し、乾燥する
石膏ボードの製造方法。5. A gypsum core material containing borax and / or boric acid is poured on a lower board base paper using a board base paper containing a water-soluble polymer, and an upper part containing a water-soluble polymer is poured from above the base gypsum core material. A method of manufacturing gypsum board that is covered with board paper and integrated and dried.
原紙を用いた下部用ボード原紙上に、水溶性高分子を含
有する石膏芯材を流し込み、その上から硼砂及び／又は
硼酸を含有する上部用ボード原紙をかぶせ一体化し、乾
燥することを特徴とする石膏ボードの製造方法。6. A gypsum core material containing a water-soluble polymer is poured onto a lower board base paper using a board base paper containing borax and / or boric acid, and an upper part containing borax and / or boric acid from above. A method for producing a gypsum board, wherein the baseboard paper is covered, integrated and dried.
である請求項１〜４項のいずれか１項に記載の石膏ボー
ド。7. The gypsum board according to claim 1, wherein the water-soluble polymer is polyvinyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28844698A JP2000117882A (en) | 1998-10-09 | 1998-10-09 | Gypsum board and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28844698A JP2000117882A (en) | 1998-10-09 | 1998-10-09 | Gypsum board and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000117882A true JP2000117882A (en) | 2000-04-25 |
Family
ID=17730325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28844698A Pending JP2000117882A (en) | 1998-10-09 | 1998-10-09 | Gypsum board and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000117882A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170246838A1 (en) * | 2016-02-26 | 2017-08-31 | United States Gypsum Company | Gypsum panels and methods |
| JP2017525586A (en) * | 2014-06-05 | 2017-09-07 | クナウフ ギプス カーゲー | Gypsum plasterboard manufacturing method and gypsum plasterboard obtained thereby |
-
1998
- 1998-10-09 JP JP28844698A patent/JP2000117882A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017525586A (en) * | 2014-06-05 | 2017-09-07 | クナウフ ギプス カーゲー | Gypsum plasterboard manufacturing method and gypsum plasterboard obtained thereby |
| US20170246838A1 (en) * | 2016-02-26 | 2017-08-31 | United States Gypsum Company | Gypsum panels and methods |
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