JPH0648862A - Production of reinforced gypsum hardened body - Google Patents
Production of reinforced gypsum hardened bodyInfo
- Publication number
- JPH0648862A JPH0648862A JP6669491A JP6669491A JPH0648862A JP H0648862 A JPH0648862 A JP H0648862A JP 6669491 A JP6669491 A JP 6669491A JP 6669491 A JP6669491 A JP 6669491A JP H0648862 A JPH0648862 A JP H0648862A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- fiber
- layer
- adhesive
- reinforced
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Panels For Use In Building Construction (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄骨耐火被覆材、耐火
間仕切り材等の建材に適する改良された補強石膏硬化体
の製法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an improved reinforced gypsum cured body suitable for building materials such as steel frame fireproof covering materials and fireproof partitioning materials.
【０００２】[0002]
【従来の技術】気泡を多量に含む石膏スラリ−を硬化さ
れて、製造される軽量石膏硬化体（多泡質石膏板）は、
その軽量性とともに、石膏（二水石膏）の特性である不
燃性、１００℃以上に熱せられたときの結晶水の脱水に
よる吸熱反応並びに硬化体内に含有される多量の気泡に
よる断熱作用等の優れた耐火特性から、鉄骨耐火被覆
材、耐火間仕切材等の建材等として従来より広く用いら
れている。然し乍ら、このような軽量石膏硬化体は、多
量の気泡を含有しているために、曲げ強度が弱く、表面
が脆くて取り扱い難く、また、表面が平滑となり難いな
どの欠点がある。2. Description of the Related Art A light-weight gypsum hardened product (multi-foam gypsum board) produced by hardening a gypsum slurry containing a large amount of bubbles is
In addition to its light weight, it is excellent in non-combustibility, which is a characteristic of gypsum (dihydrate gypsum), an endothermic reaction due to dehydration of crystal water when heated to 100 ° C or more, and a heat insulating effect due to a large amount of bubbles contained in the hardened body. Due to its fire resistance, it has been widely used as a building material such as a steel frame fireproof coating material and a fireproof partition material. However, since such a light-weight gypsum hardened product contains a large amount of air bubbles, it has weaknesses such as weak bending strength, a fragile surface that makes it difficult to handle, and a surface that is difficult to smooth.
【０００３】このため、従来、軽量石膏硬化体の問題を
解決するものとして、緻密質石膏層、多泡質石膏層及び
緻密石膏層の三層積層構造よりなる軽量石膏硬化体を製
造する方法が提案されている（特開昭６３−２４２５０
３号参照）。この方法では、表面が平滑で固く、且つ高
い曲げ強度を有し、可燃性ないし発煙性の材料を使用す
ることなく、耐火材として十分な不燃性を備える軽量石
膏硬化体の製造が可能とされる。然し乍ら、この方法で
作製される軽量石膏硬化体も未だ曲げ強度等が弱く、建
材として、機械的強度や耐久性のより一層の向上が望ま
れていた。Therefore, as a conventional method for solving the problem of the light-weight gypsum hardened body, there is a method for producing a light-weight gypsum hardened body having a three-layer laminated structure of a dense gypsum layer, a foamy gypsum layer and a dense gypsum layer. Proposed (JP-A-63-24250)
(See No. 3). In this method, the surface is smooth and hard, and has a high bending strength, without using a flammable or fuming material, it is possible to produce a lightweight gypsum hardened body having sufficient noncombustibility as a fireproof material. It However, the light-weight gypsum hardened product produced by this method still has a weak bending strength and the like, and further improvement in mechanical strength and durability as a building material has been desired.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記の問題
点を解決するためになされたもので、繊維含有で石膏硬
化体を成形する場合に、より高い機械的強度と耐久性が
得られる補強石膏硬化体を製造方法を提供することを目
的にする。即ち、本発明は、補強石膏硬化体を作製する
場合に繊維と石膏との間が、繊維は撥水性があるため、
円滑に接触しなく、濡れ易くないことを見出し、この見
地から、本発明を成し、接着剤をあらかじめ用いること
を行なうことにより、解決したものである。従って、本
発明は、補強石膏硬化体の新規な製造方法を提供するこ
とを目的にする。The present invention has been made in order to solve the above problems, and when molding a gypsum hardened body containing fibers, higher mechanical strength and durability can be obtained. An object is to provide a method for producing a reinforced gypsum hardened body. That is, the present invention, between the fiber and gypsum when producing a reinforced gypsum cured body, because the fiber is water-repellent,
The inventors have found that they do not come into contact with each other smoothly and are not easily wetted, and from this point of view, the present invention has been achieved and the problems have been solved by using an adhesive in advance. Therefore, an object of the present invention is to provide a novel method for producing a cured gypsum reinforced product.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記の技術的
な課題の解決のために、成されたもので、多泡体石膏層
を挾んで、上下の表面層に、（少なくとも上下のどちら
かの表面層に繊維含有石膏層を形成する）繊維含有石膏
層を形成する補強石膏硬化体の製造方法において、石膏
層に入れ込む繊維に対して、接着剤をあらかじめ、付着
せしめ、接着剤の付着した繊維を石膏層に入れ込んで行
き、繊維含有石膏層を、少なくとも石膏硬化体の表面に
形成することを特徴とする補強石膏硬化体の製法を提供
する。The present invention has been made to solve the above-mentioned technical problems. It is possible to sandwich a multi-foam gypsum layer on the upper and lower surface layers (at least the upper and lower surface layers). (A fiber-containing gypsum layer is formed on either surface layer) In the method for producing a hardened reinforced gypsum body for forming a fiber-containing gypsum layer, an adhesive agent is applied in advance to the fibers to be put into the gypsum layer, The method for producing a reinforced gypsum hardened product is characterized in that the fiber-containing gypsum layer is formed on at least the surface of the gypsum hardened product by inserting the fibers having adhered thereto in the gypsum layer.
【０００６】[0006]
【作用】本発明によると、接着剤でかためられた繊維束
の間及び周囲に、石膏結晶が成長するので、石膏結晶が
大きく成長でき、また、繊維と石膏形成との付着を良好
にしている。これらの現象は、接着剤でかためた繊維束
を用いて、作製した補強石膏硬化体を、顕微鏡観察した
結果、確認されたものである。繊維の間に、大きな石膏
結晶が、多く見られたものである。また、引き抜いた繊
維の表面には石膏の結晶が多数付着していた。According to the present invention, the gypsum crystals grow between and around the fiber bundles hardened with the adhesive, so that the gypsum crystals can grow largely and the adhesion between the fibers and the gypsum formation is improved. These phenomena have been confirmed as a result of microscopic observation of the reinforced gypsum hardened body produced using the fiber bundle hardened with the adhesive. Large gypsum crystals are often found between the fibers. In addition, a large number of gypsum crystals adhered to the surface of the drawn fiber.
【０００７】本発明では、表面処理された繊維を用いる
もので、ガラス繊維を使用したときは、接着剤は、収束
剤として機能しているもので、繊維と石膏とを橋わたし
する（架橋する）ものである。また、接着剤は、コ−テ
ィング剤としても機能して、繊維の強度を向上させるも
のである。即ち、コ−ティングされたガラス繊維は、引
き抜きのときの引き抜き強度が改善される。また、コ−
ティングされたガラス繊維は、結果として、曲げ強度も
向上される。In the present invention, a surface-treated fiber is used. When glass fiber is used, the adhesive functions as a sizing agent and bridges (crosslinks) the fiber and gypsum. ). The adhesive also functions as a coating agent to improve the strength of the fiber. That is, the coated glass fiber has an improved drawing strength at the time of drawing. Also,
The woven glass fibers also have an improved flexural strength as a result.
【０００８】本発明の補強石膏硬化体の製造方法を行な
うために用いる材料は、次のようなものを使用する。ま
ず、石膏材料としては、半水石膏、α型、β型いずれで
も用いることができる。また、多泡質石膏層を形成する
とき、スラリ−に気泡を導入することができる。その方
法は、プレフォ−ム法又はミックスフォ−ム法のいずれ
でもできる。プレフォ−ム法は、水にアルキル硫酸ソ−
ダ、アルキルベンゼンスルホン酸ソ−ダ、ポリオキシエ
チレンアルキル硫酸等の公知の起泡剤を半水石膏を添加
し、強力に撹拌して発泡させる。この際に、ＰＶＡ、Ｍ
Ｃを添加すると安定した気泡ができる。ミックスフォ−
ム法は、同様な配合で材料を同時に投入し、強力に撹拌
し、起泡するものである。Materials used for carrying out the method for producing a cured gypsum reinforced product of the present invention are as follows. First, as the gypsum material, any of hemihydrate gypsum, α type and β type can be used. Further, when forming the multi-foam gypsum layer, bubbles can be introduced into the slurry. The method can be either a preform method or a mixform method. The preform method is based on the solution of sodium alkyl sulfate in water.
A known foaming agent such as da, soda alkyl benzene sulfonate, polyoxyethylene alkyl sulfuric acid, etc. is added to hemihydrate gypsum and strongly stirred to foam. At this time, PVA, M
When C is added, stable bubbles are formed. Mix for
The Mu method is a method in which materials having the same composition are added at the same time, and the mixture is vigorously stirred and foamed.
【０００９】補強繊維としては、ガラス繊維、炭素繊維
等の無機繊維、天然若しくは合成の有機高分子繊維を使
用できる。ガラス繊維としては、モノフィラメント形状
のものが好適であるが、他の形状、ストランド等のもの
も使用できる。有機高分子繊維としては、ビニロン繊維
がコスト的に好適である。これらは、単独或いは２種以
上を組合わせ配合することができる。原料の石膏に対す
る補強繊維の割合が少な過ぎると十分な補強効果が得ら
れず、また多過ぎると成形性が損なわれる。繊維は、撚
りをかけたもの、かけていないものいずれも使用でき
る。例えば、１０μｍ直径のガラス繊維を数百本まとめ
て、繊維束にしたものを用いることができる。通常の場
合、ロ−ビング、コ−ド若しくはヤ−ンの４６０〜８８
００番手のものが好適である。As the reinforcing fiber, inorganic fiber such as glass fiber and carbon fiber, natural or synthetic organic polymer fiber can be used. As the glass fiber, a monofilament shape is preferable, but other shapes, strands and the like can also be used. As the organic polymer fiber, vinylon fiber is suitable in terms of cost. These may be used alone or in combination of two or more. If the ratio of the reinforcing fiber to the raw material gypsum is too small, a sufficient reinforcing effect cannot be obtained, and if it is too large, the moldability is impaired. The fiber may be twisted or untwisted. For example, a bundle of hundreds of glass fibers having a diameter of 10 μm can be used as a fiber bundle. Usually, lobing, cord or yarn 460-88
The 00th one is preferable.
【００１０】補強繊維を濡らすための接着剤としては、
酢酸ビニルエマルジョン、アクリルエマルジョン、ポリ
ビニルアルコ−ル水溶液、メチルセルロ−ズ水溶液、Ｃ
ＭＣ水溶液等を使用できる。水性エマルジョンを、石膏
層内に入れ込む前に、繊維束に、スプレイ等により、吹
き掛け、或いは塗りかけ、どぶつけ、ロ−ルコ−タ等の
操作により、適切に繊維に接着剤を与えることができ
る。そして、接着剤が、乾いてしまう前に、石膏スラリ
−中にいれてしまう。即ち、石膏の中にからみ、入って
いくものである。As an adhesive for wetting the reinforcing fiber,
Vinyl acetate emulsion, acrylic emulsion, polyvinyl alcohol aqueous solution, methyl cellulose aqueous solution, C
An MC aqueous solution or the like can be used. Before putting the aqueous emulsion into the gypsum layer, appropriately apply an adhesive to the fiber bundle by spraying or spraying on the fiber bundle, spraying, dashing, roll coater, etc. You can Then, the adhesive is put in the plaster slurry before it dries. That is, it is entangled in gypsum and enters.
【００１１】石膏材料に対する凝結遅延剤としては、オ
キシカルボン酸及びその塩類、グルコン酸及びその塩
類、リン酸及びその塩類、アミノ酸、糖類などがあり、
凝結促進剤としては、硫酸カルシウム、硫酸ナトリウ
ム、硫酸アルミニウムらの硫酸塩がある。Examples of setting retarders for gypsum materials include oxycarboxylic acid and its salts, gluconic acid and its salts, phosphoric acid and its salts, amino acids and sugars.
Examples of setting accelerators include sulfates such as calcium sulfate, sodium sulfate and aluminum sulfate.
【００１２】本発明により、処理された繊維束は、乾燥
しないで、或いは乾燥させてのいずれの状態でも使用で
きる。接着剤樹脂の塗布量は、固形分で、繊維束の重量
に対して、１〜１００重量％の範囲で使用できる。According to the invention, the treated fiber bundles can be used either in the undried state or in the dried state. The adhesive resin can be used in a solid content of 1 to 100% by weight based on the weight of the fiber bundle.
【００１３】本発明の補強石膏硬化体の製造方法は、補
強石膏硬化体を連続的に製造する装置に適用することが
できる。例えば、その装置に、繊維束に樹脂を塗布した
り、付着したりする前処理を行なう装置を追加すれば、
本発明の方法を行なうことができる。それは、スプレ
−、滴下、ロ−ラ−等の装置を取り付ければ、可能であ
る。或いは、更に、繊維束の供給装置は、樹脂処理機構
と繊維束に張力を与える機構を兼ね備えたものにする
と、より好適である。The method for producing a hardened reinforced gypsum product of the present invention can be applied to an apparatus for continuously producing a hardened reinforced gypsum product. For example, if you add a device that performs pretreatment such as applying resin to the fiber bundle or attaching it to that device,
The method of the invention can be carried out. It is possible if a device such as a sprayer, a drip unit, and a roller is attached. Alternatively, it is more preferable that the fiber bundle supply device also has a resin processing mechanism and a mechanism for applying tension to the fiber bundle.
【００１４】次に、本発明の補強石膏硬化体を具体的に
実施例により説明するが、本発明はそれらによって限定
されるものではない。Next, the reinforced gypsum cured product of the present invention will be specifically described by way of examples, but the present invention is not limited thereto.
【００１５】[0015]
【実施例１】図１は、本発明の補強石膏硬化体の製法を
模式的に示す断面図である。ボディ−ベルト１０の上
に、上流側から、順に、緻密質石膏スラリ−層４を供給
し、その上に、接着剤と接触させた繊維束２を供給し、
次に、多泡質石膏スラリ−層６を供給し、接着剤と接触
させた後の繊維束２と緻密質石膏スラリ−層８とを一緒
に供給する。Example 1 FIG. 1 is a sectional view schematically showing a method for producing a cured reinforced gypsum product of the present invention. On the body-belt 10, from the upstream side, in order, the dense gypsum slurry layer 4 is supplied, and the fiber bundle 2 in contact with the adhesive is supplied thereon,
Next, the foamed gypsum slurry layer 6 is supplied, and the fiber bundle 2 after being brought into contact with the adhesive and the dense gypsum slurry layer 8 are supplied together.
【００１６】繊維束２の供給方法として、例えば、図２
の断面図に示すように、繊維束２は、３０％酢酸ビニル
エマルジョン１３がスプレイされた後、石膏層４に供給
され、ヘラ９で成形しながら、石膏層内に組み入れ、更
に、図１に示すように、その上に、多泡質石膏スラリ−
層６、緻密質石膏スラリ−層８を積層しながら、補強石
膏硬化体が作製される。繊維束として、ガラス繊維２３
１０番手を使用し、酢酸ビニルエマルジョンは、ガラス
繊維束重量に対して、３０重量％の割合で行なった。以
上で、作製した補強石膏硬化体の嵩比重は、０．７０で
あり、曲げ強度が、４０ｋｇｆ／ｃｍ2であった。酢酸
ビニルエマルジョンで前処理しないガラス繊維束を用い
て、同様に作製した補強石膏硬化体は、嵩比重０．７０
で、曲げ強度３３ｋｇｆ／ｃｍ2であった。As a method of supplying the fiber bundle 2, for example, as shown in FIG.
As shown in the cross-sectional view of FIG. 1, the fiber bundle 2 is supplied to the gypsum layer 4 after being sprayed with the 30% vinyl acetate emulsion 13, and is incorporated into the gypsum layer while molding with the spatula 9 and further, in FIG. As shown, on top of that, a foamy gypsum slurry-
While laminating the layer 6 and the dense gypsum slurry layer 8, a reinforced gypsum hardened body is produced. As a fiber bundle, glass fiber 23
The 10th count was used and the vinyl acetate emulsion was used at a ratio of 30% by weight based on the weight of the glass fiber bundle. As described above, the bulk specific gravity of the produced reinforced gypsum cured product was 0.70, and the bending strength was 40 kgf / cm 2 . A reinforced gypsum cured product prepared in the same manner using a glass fiber bundle not pretreated with a vinyl acetate emulsion has a bulk specific gravity of 0.70.
The bending strength was 33 kgf / cm 2 .
【００１７】[0017]
【実施例２】β−半水石膏１００重量部に対し、水６５
重量部と、酢酸ビニルエマルジョン３０％を散布したガ
ラス繊維０．８重量部を混練して、スラリ−Ａを調製し
た。別に、８０重量部の水にアニオン型界面活性剤０．
０１５重量部及びＰＶＡを０．１重量部加え、ミキサ−
で高速で撹拌して、起泡させ、これにβ−半水石膏１０
０重量部と、酢酸ビニルエマルジョン３０重量部を散布
されたガラス繊維１．４重量部を加えて混合し、多泡質
スラリ−Ｂを調製した。更に、番手２３１０のガラスロ
−ビングを２４ｃｍの長さに切断し，ガラス繊維束とし
て，これに酢酸ビニルエマルジョンをガラス繊維に対し
て３０重量％の割合で散布した。Example 2 100 parts by weight of β-hemihydrate gypsum was mixed with 65 parts of water.
Slurry-A was prepared by kneading parts by weight and 0.8 parts by weight of glass fibers dispersed with 30% of vinyl acetate emulsion. Separately, anionic surfactant 0.
Add 015 parts by weight and 0.1 parts by weight of PVA, and mix.
And stir at high speed to create a lather, and then β-hemihydrate gypsum 10
0 parts by weight and 1.4 parts by weight of glass fibers sprinkled with 30 parts by weight of vinyl acetate emulsion were added and mixed to prepare a multi-foam slurry-B. Furthermore, the glass roving of count 2310 was cut into a length of 24 cm, and a vinyl fiber emulsion was sprayed on the glass fiber bundle at a ratio of 30% by weight based on the glass fiber.
【００１８】６ｃｍ×２４ｃｍ×６ｃｍ（厚さ）の型枠
に、スラリ−Ａを５ｍｍの厚さに注入し、その上に、上
記のように酢酸ビニルエマルジョン散布したガラス繊維
束２本を長手方向に５ｃｍ間隔で平行に配列し、更にス
ラリ−Ｂを厚さ５５ｍｍまで注入し、その上に、酢酸ビ
ニルエマルジョン散布したガラス繊維束２本を長手方向
に５ｃｍ間隔で平行に配列し、更にスラリ−Ａを６０ｍ
ｍ厚さまで注入し、硬化した後、脱型し、４０℃で３日
間通風乾燥し、３日間通風乾燥して、補強石膏硬化体を
得た。Slurry A was poured into a mold of 6 cm × 24 cm × 6 cm (thickness) to a thickness of 5 mm, and two glass fiber bundles dispersed with the vinyl acetate emulsion as described above were placed in the longitudinal direction. In parallel with each other at 5 cm intervals and further injecting slurry B to a thickness of 55 mm, on which 2 glass fiber bundles dispersed with vinyl acetate emulsion are arranged in parallel at 5 cm intervals in the longitudinal direction, and further slurry- A to 60 m
After injecting to a thickness of m and curing, it was demolded, dried by ventilation at 40 ° C. for 3 days, and dried by ventilation for 3 days to obtain a reinforced gypsum cured body.
【００１９】この補強石膏硬化体は、嵩比重０．７０
で、曲げ強度４０ｋｇｆ／ｃｍ2であった。尚、使用し
た繊維束重量は、補強石膏硬化体の０．４８重量％であ
った。This reinforced gypsum cured product has a bulk specific gravity of 0.70.
The bending strength was 40 kgf / cm 2 . The weight of the fiber bundle used was 0.48% by weight of the cured reinforced gypsum.
【００２０】[0020]
【発明の効果】以上説明したように、本発明の補強石膏
硬化体により、前記のような効果が得られた。それらを
まとめると、次のような顕著な技術的効果となる。即
ち、第１に、曲げ強度などの強度の向上した補強石膏硬
化体が得られる。第２に、繊維束の中及び周囲に大きな
石膏結晶が成長し、更に繊維と石膏結晶との付着を強固
にしていることにより、より高い機械的強度と耐久性を
有する補強石膏硬化体の製法を提供する。As described above, the above-mentioned effects were obtained by the reinforced gypsum cured product of the present invention. Summarizing them, the following remarkable technical effects are obtained. That is, first, a reinforced gypsum cured product having improved strength such as bending strength can be obtained. Secondly, a method for producing a hardened reinforced gypsum body having higher mechanical strength and durability by growing large gypsum crystals in and around the fiber bundle and further strengthening the adhesion between the fibers and the gypsum crystals. I will provide a.
【図１】本発明の補強石膏硬化体の製法を模式的に示し
た断面図である。FIG. 1 is a cross-sectional view schematically showing a method for producing a cured gypsum reinforced product of the present invention.
【図２】本発明の補強石膏硬化体の適用できる連続製造
装置を示す断面図である。FIG. 2 is a cross-sectional view showing a continuous manufacturing apparatus to which the cured gypsum reinforced product of the present invention can be applied.
２ ガラス繊維束 ３ 接着剤塗布装置 ４、８ 接着剤付き繊維を含有する緻密質石膏
層 ６ 中間石膏層2 Glass fiber bundle 3 Adhesive applying device 4, 8 Dense gypsum layer containing fibers with adhesive 6 Intermediate gypsum 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 Ｃ０４Ｂ 28/14 Ｅ０４Ｃ 2/04 Ｅ 7904−2Ｅ //(Ｃ０４Ｂ 28/14 14:38 Ｚ 2102−4Ｇ 16:06） Ｃ 2102−4Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location C04B 28/14 E04C 2/04 E 7904-2E // (C04B 28/14 14:38 Z 2102- 4G 16:06) C 2102-4G
Claims (2)
のどちらかの表面層に繊維含有石膏層を形成する補強石
膏硬化体の製造方法において、 石膏層に入れ込む繊維に対して、接着剤をあらかじめ、
付着せしめ、接着剤の付着した繊維を石膏層に入れ込ん
で行き、繊維含有石膏層を、少なくとも石膏硬化体の表
面に形成することを特徴とする補強石膏硬化体の製法。1. A method for producing a reinforced gypsum cured body, which comprises sandwiching a multi-foam gypsum layer to form a fiber-containing gypsum layer on at least one of the upper and lower surface layers, and bonding it to fibers to be incorporated into the gypsum layer. Agent beforehand,
A method for producing a hardened gypsum reinforced body, which comprises adhering the fibers, to which the adhesive has been applied, into a gypsum layer, and forming the fiber-containing gypsum layer on at least the surface of the hardened gypsum body.
全体層厚の１０〜５０％である請求項１に記載の補強石
膏硬化体の製法。2. The total thickness of the fiber-containing gypsum layer is:
The method for producing a reinforced gypsum hardened product according to claim 1, which is 10 to 50% of the total layer thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6669491A JPH0648862A (en) | 1991-03-29 | 1991-03-29 | Production of reinforced gypsum hardened body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6669491A JPH0648862A (en) | 1991-03-29 | 1991-03-29 | Production of reinforced gypsum hardened body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0648862A true JPH0648862A (en) | 1994-02-22 |
Family
ID=13323304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6669491A Pending JPH0648862A (en) | 1991-03-29 | 1991-03-29 | Production of reinforced gypsum hardened body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648862A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941315A1 (en) * | 1988-12-16 | 1990-06-21 | Hitachi Koki Kk | DEVICE FOR AVOIDING ANGLED PAPER SHEETS |
| DE3916039A1 (en) * | 1989-05-17 | 1990-11-22 | Kodak Ag | Container for stacks of sheets stapled together - has sloping depositing surface, with cavity, and stop pieces and rotary piece |
| DE3916038A1 (en) * | 1989-05-17 | 1990-11-22 | Kodak Ag | CONTAINER FOR STORING STACKS OF LEAFS |
| WO2004039749A1 (en) * | 2002-10-29 | 2004-05-13 | Yoshino Gypsum Co., Ltd. | Method for producing light gypsum board |
| US11433645B2 (en) | 2013-12-30 | 2022-09-06 | Saint-Gobain Placo Sas | Building boards with increased surface strength |
-
1991
- 1991-03-29 JP JP6669491A patent/JPH0648862A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941315A1 (en) * | 1988-12-16 | 1990-06-21 | Hitachi Koki Kk | DEVICE FOR AVOIDING ANGLED PAPER SHEETS |
| DE3916039A1 (en) * | 1989-05-17 | 1990-11-22 | Kodak Ag | Container for stacks of sheets stapled together - has sloping depositing surface, with cavity, and stop pieces and rotary piece |
| DE3916038A1 (en) * | 1989-05-17 | 1990-11-22 | Kodak Ag | CONTAINER FOR STORING STACKS OF LEAFS |
| WO2004039749A1 (en) * | 2002-10-29 | 2004-05-13 | Yoshino Gypsum Co., Ltd. | Method for producing light gypsum board |
| EP1559698A1 (en) * | 2002-10-29 | 2005-08-03 | Yoshino Gypsum Co., Ltd. | Method for producing light gypsum board |
| EP1559698A4 (en) * | 2002-10-29 | 2010-10-06 | Yoshino Gypsum Co | Method for producing light gypsum board |
| US7819993B2 (en) | 2002-10-29 | 2010-10-26 | Yoshino Gypsum Co., Ltd. | Method for producing light gypsum board |
| US11433645B2 (en) | 2013-12-30 | 2022-09-06 | Saint-Gobain Placo Sas | Building boards with increased surface strength |
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