JPH0521871B2 - - Google Patents
Info
- Publication number
- JPH0521871B2 JPH0521871B2 JP4442189A JP4442189A JPH0521871B2 JP H0521871 B2 JPH0521871 B2 JP H0521871B2 JP 4442189 A JP4442189 A JP 4442189A JP 4442189 A JP4442189 A JP 4442189A JP H0521871 B2 JPH0521871 B2 JP H0521871B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber cement
- emulsion
- curing
- autoclave
- emulsifier
- 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.)
- Expired - Lifetime
Links
- 239000004568 cement Substances 0.000 claims description 37
- 239000000835 fiber Substances 0.000 claims description 37
- 239000000839 emulsion Substances 0.000 claims description 31
- 239000003995 emulsifying agent Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- -1 acrylic ester Chemical class 0.000 claims description 3
- 238000006253 efflorescence Methods 0.000 description 10
- 206010037844 rash Diseases 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 9
- 239000003973 paint Substances 0.000 description 7
- 239000010425 asbestos Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000012874 anionic emulsifier Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/483—Polyacrylates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、建築用板として用いられる繊維セメ
ント板の養生方法に関するものである。
The present invention relates to a method for curing fiber cement boards used as building boards.
天井材など建築用板等として用いられる繊維セ
メント板を製造するにあたつて、養生をオートク
レーブを用いておこなうことがなされている。こ
のオートクレーブ養生は加圧雰囲気で加熱するこ
とによつておこなわれるものであり、収縮が少な
くクラツクの発生を低減した板材を得ることがで
きる等の効果がある。
そしてこのように繊維セメント板をオートクレ
ーブ養生する場合は、繊維セメント板の表面にエ
フロレツセンス（白華）が発生するおそれがあ
り、エフロレツセンスが発生すると繊維セメント
板の表面に化粧塗装を施す際に塗膜密着性が低下
するという問題がある。そこで従来から、オート
クレーブ養生する前に繊維セメント板の表面にエ
マルジヨンを塗装しておくことによつて、エフロ
レツセンスが発生することを防止することがなさ
れている。
In manufacturing fiber cement boards used as architectural boards such as ceiling materials, curing is performed using an autoclave. This autoclave curing is carried out by heating in a pressurized atmosphere, and has the advantage that it is possible to obtain a plate material with less shrinkage and less occurrence of cracks. When curing fiber cement boards in an autoclave in this way, there is a risk that efflorescence may occur on the surface of the fiber cement boards. In some cases, there is a problem that the adhesion of the coating film decreases. Conventionally, therefore, the occurrence of efflorescence has been prevented by coating the surface of the fiber cement board with an emulsion before autoclave curing.
しかしこのように繊維セメント板の表面にエマ
ルジヨンを塗布して繊維セメント板を積み重ね、
これをオートクレーブ中に導入してオートクレー
ブ養生をおこなうと、オートクレーブ養生の際に
エマルジヨンの塗膜がベタついて、積み重ねた上
下の繊維セグメント板が張り付いてしまうブロツ
キングが発生し易いという問題があつた。
本発明は上記の点に鑑みて為されたものであ
り、ブロツキングが生じることなくエマルジヨン
でエフロレツセンスの発生を防止しつつオートク
レーブ養生をおこなうようにすることを目的とす
るものである。
However, in this way, emulsion is applied to the surface of the fiber cement boards and the fiber cement boards are stacked up.
When this was introduced into an autoclave and autoclave curing was performed, there was a problem in that the emulsion coating became sticky during autoclave curing, and blocking, where the stacked upper and lower fiber segment plates stuck together, was likely to occur. The present invention has been made in view of the above points, and it is an object of the present invention to perform autoclave curing while preventing the occurrence of efflorescence in an emulsion without causing blocking.
本発明に係る繊維セメント板の養生方法は、繊
維セメント板の表面に乳化剤を含まないエマルジ
ヨンを塗装し、この繊維セメント板を複数枚積載
してオートクレーブ養生することを特徴とするも
のである。
また本発明にあつて、乳化剤を含まないエマル
ジヨンとしてアクリル酸エステル系エマルジヨン
を用いるのが好ましい
以下、本発明を詳細に説明する。
建築用板などとして繊維セメント板を製造する
にあたつては、まず石綿または石綿の他にパル
プ、アクリル繊維、ビニロン繊維などの補強繊維
とセメント、スラグ、シリカ骨材等を混合し、こ
れを水に分散してスラリーを調製するか、あるい
はこれを水と混練して混練材料を調製する。この
とき石綿を用いずに脱アスベストにすることもで
きる。そしてスラリーの場合には抄造法で抄造
し、また混練材料の場合には押出し成型法やモル
タル成型法などで成型し、得られた繊維セメント
板を手で移動可能な状態になるまで常温で硬化さ
せる養生をおこない、次いでオートクレーブ養生
をおこなう。
このように繊維セメント板をオートクレーブ養
生する先だつて、繊維セメント板の化粧塗装をす
る表面にエマルジヨンを塗布して乾燥させる。エ
マルジヨンは一般に乳化剤を含んでおり、オート
クレーブ養生をおこなう際にこの乳化剤の作用に
よつてエマルジヨンの塗膜がベタついてくると考
えられる。そこで本発明においては乳化剤が含有
されていないエマルジヨンを用いるものである。
このような乳化剤を含んでいないエマルジヨンと
しては市販されているものをそのまま用いること
ができるものであり、特に限定されないが、本発
明ではアクリル酸エステル系エマルジヨンを用い
る。またエマルジヨンの粒径が大きいと、繊維セ
メント板に塗布する際の浸透性が悪くエフロレツ
センスを抑えるためには塗布量を多くする必要が
ある。そこで本発明においては、エマルジヨンと
してエマルジヨン粒径が平均0.05μ以下のものを
用いるのが好ましい。さらにエマルジヨンとして
は固形分含有率が２〜10％のものが好ましい。
そして、上記のように繊維セメント板１の表面
に乳化剤を含まないエマルジヨン２を散布した
後、第１図に示すように複数枚の繊維セメント板
１，１…を積み重ね、これをオートクレーブに導
入して、例えば５〜10気圧の加圧雰囲気で150〜
200℃、好ましくは150〜175℃の温度に加熱し、
この最高温度に達してから４〜12時間維持する条
件で、オートクレーブ養生をおこなう。このよう
にしてオートクレーブ養生をした後に、繊維セメ
ント板１のエマルジヨン２を塗布した表面にアク
リル樹脂塗料などの化粧塗料を塗布して建築用板
等として仕上げることができる。
The method for curing fiber cement boards according to the present invention is characterized by coating the surface of the fiber cement boards with an emulsion that does not contain an emulsifier, stacking a plurality of these fiber cement boards, and curing them in an autoclave. Further, in the present invention, it is preferable to use an acrylic acid ester emulsion as the emulsion that does not contain an emulsifier.The present invention will be described in detail below. When manufacturing fiber cement boards for construction boards, etc., first, asbestos or reinforcing fibers such as pulp, acrylic fibers, and vinylon fibers are mixed with cement, slag, silica aggregate, etc. A slurry is prepared by dispersing it in water, or a kneaded material is prepared by kneading this with water. At this time, it is also possible to remove asbestos without using asbestos. Then, in the case of slurry, it is made into paper using a papermaking method, and in the case of kneaded material, it is molded using extrusion molding or mortar molding, and the resulting fiber cement board is cured at room temperature until it can be moved by hand. After that, autoclave curing is performed. Prior to autoclaving the fiber cement board, an emulsion is applied to the surface of the fiber cement board to be coated and allowed to dry. Emulsions generally contain an emulsifier, and it is thought that the emulsion coating becomes sticky due to the action of this emulsifier during autoclave curing. Therefore, in the present invention, an emulsion containing no emulsifier is used.
Commercially available emulsions that do not contain such an emulsifier can be used as they are, and are not particularly limited, but in the present invention, acrylic ester emulsions are used. Furthermore, if the particle size of the emulsion is large, it will have poor permeability when applied to fiber cement boards, and in order to suppress efflorescence, it is necessary to increase the amount of application. Therefore, in the present invention, it is preferable to use an emulsion having an average particle size of 0.05 μm or less. Further, the emulsion preferably has a solid content of 2 to 10%. After spraying the emulsion 2 that does not contain an emulsifier on the surface of the fiber cement board 1 as described above, a plurality of fiber cement boards 1, 1, etc. are stacked as shown in Fig. 1, and this is introduced into an autoclave. For example, in a pressurized atmosphere of 5 to 10 atmospheres,
heated to a temperature of 200℃, preferably 150-175℃,
After reaching this maximum temperature, autoclave curing is performed under conditions where it is maintained for 4 to 12 hours. After curing in an autoclave in this way, a decorative paint such as an acrylic resin paint can be applied to the surface of the fiber cement board 1 coated with the emulsion 2 to finish it as a construction board or the like.
以下本発明を実施例によつて例証する。
実施例 １、２
石綿を13重量％配合した組成のセメントスラリ
ーを抄造することによつて繊維セメント板を調製
し、室温養生をしたのちにこの繊維セメント板の
表面に乳化剤を含有しないアクリル酸エステル系
エマルジヨン（日本特殊塗料社製）を第１表の希
釈比で水で希釈すると共に第１表の塗布量（固形
分換算）で塗装した。次いでこの繊維セメント板
を10枚重ね、10気圧、160℃の条件で８時間オー
トクレーブ養生をおこなつた。このようにしてオ
ートクレーブ養生をした後に、繊維セメント板の
エマルジヨンを塗装した表面にアクリル樹脂塗料
を塗装して化粧仕上げすることによつて繊維セメ
ント系の建築用板を得た。
比較例 １、２、３
アニオン系の乳化剤を含有する第１表のエマル
ジヨン（日本特殊塗料社製）を用いるようにした
他は、上記「実施例１、２」と同様にして繊維セ
メント系の建築用板を得た。
従来例
エマルジヨン塗装をおこなうことなくオートク
レーブ養生をおこなうようにした他は、上記「実
施例１、２」と同様にして繊維セメント系の建築
用板を得た。
上記のものにおいて、オートクレーブ養生をお
こなつた後の繊維セメント板について、エフロレ
ツセンスの発生の有無を観察し、またブロツキン
グが発生しているかどうかを調べた。結果を第１
表に示す。第１表のエフロレツセンスの項目にお
いて「◎」はエフロレツセンスが全く発生せず、
「○」はエフロレツセンスが殆ど発生せず、「△」
はエフロレツセンスがやや発生する、「×」はエ
フロレツセンスが多く発生することを表示するも
のであり、ブロツキングの項目において「○」は
ブロツキングが発生せず、「△」はブロツキング
がやや発生する、「×」はブロツキングが大きく
発生するとを表示するものである。また化粧仕上
げのために施したアクリル樹脂塗料の塗膜のの密
着性を測定した。結果を第１表の化粧塗膜密着の
項目に表示した。この項目において「○」は塗膜
密着性が良好、「△」は塗膜密着性がやや不良、
「×」は塗膜密着性が不良であることを表示する
ものである。
The invention will now be illustrated by examples. Examples 1 and 2 A fiber cement board was prepared by paper-making a cement slurry containing 13% by weight of asbestos, and after curing at room temperature, an acrylic ester containing no emulsifier was applied to the surface of the fiber cement board. A type emulsion (manufactured by Nippon Tokushu Toyo Co., Ltd.) was diluted with water at the dilution ratio shown in Table 1 and coated at the coating amount (in terms of solid content) shown in Table 1. Next, 10 sheets of this fiber cement board were stacked and cured in an autoclave for 8 hours at 10 atm and 160°C. After curing in an autoclave in this manner, a fiber cement architectural board was obtained by applying an acrylic resin paint to the emulsion-coated surface of the fiber cement board for a decorative finish. Comparative Examples 1, 2, 3 Fiber cement-based emulsions were prepared in the same manner as in Examples 1 and 2 above, except that the emulsion shown in Table 1 containing an anionic emulsifier (manufactured by Nippon Tokushu Toyo Co., Ltd.) was used. Obtained construction boards. Conventional Example A fiber cement building board was obtained in the same manner as in Examples 1 and 2 above, except that autoclave curing was performed without emulsion coating. In the above-mentioned fiber cement boards after autoclave curing, the presence or absence of efflorescence was observed, and the occurrence of blocking was also investigated. Results first
Shown in the table. In the item of efflorescens in Table 1, "◎" indicates that no efflorescens occurs at all.
“○” means that almost no efflorescence occurs, and “△” means
indicates that efflorescence occurs slightly, "x" indicates that efflorescence occurs frequently, and in the blocking item, "○" indicates that no blocking occurs, and "△" indicates that blocking occurs slightly. An "x" indicates that blocking occurs to a large extent. We also measured the adhesion of the acrylic resin paint film applied for decorative finishing. The results are shown in Table 1 under the heading of cosmetic paint film adhesion. In this item, "○" indicates good paint film adhesion, "△" indicates slightly poor paint film adhesion.
"X" indicates that the coating film adhesion is poor.
【表】
第１表の結果にみられるように、乳化剤を含有
しないエマルジヨンを用いることによつて、エフ
ロレツセンスの発生を防止しつつ、ブロツキング
の発生も防ぐことができることが確認される。[Table] As seen in the results in Table 1, it is confirmed that by using an emulsion that does not contain an emulsifier, it is possible to prevent the occurrence of efflorescence as well as blocking.
上述のように本発明にあつては、繊維セメント
板の表面に乳化剤を含まないエマルジヨを塗装
し、この繊維セメント板を複数枚積載してオート
クレーブ養生するようにしたので、エマルジヨン
の塗装によつてオートクレーブ養生の際に繊維セ
メント板にエフロレツセンスが発生することを防
ぐことができると共に、エマルジヨンには乳化剤
を含まないためにオートクレーブ養生の際にエマ
ルジヨン塗膜にベタつきが生じて積載した繊維セ
メント板間にブロツキングが発生することを防止
することができるものである。
As mentioned above, in the present invention, an emulsion containing no emulsifier is applied to the surface of the fiber cement board, and a plurality of these fiber cement boards are stacked and cured in an autoclave. It is possible to prevent efflorescence from occurring on the fiber cement board during autoclave curing, and since the emulsion does not contain an emulsifier, the emulsion coating film becomes sticky during autoclave curing. This can prevent blocking from occurring in between.
第１図はオートクレーブ養生の際の繊維セメン
ト板の積載状態を示す断面図である。
１は繊維セメント板、２はエマルジヨンであ
る。
FIG. 1 is a sectional view showing the loading state of fiber cement boards during autoclave curing. 1 is a fiber cement board, and 2 is an emulsion.
Claims (1)
マルジヨンを塗装し、この繊維セメント板を複数
枚積載してオートクレーブ養生することを特徴と
する繊維セメント板の養生方法。 ２ 乳化剤を含まないエマルジヨンとしてアクリ
ル酸エステル系エマルジヨンを用いることを特徴
とする請求項１記載の繊維セメント板の養生方
法。[Claims] 1. A method for curing a fiber cement board, which comprises coating the surface of a fiber cement board with an emulsion that does not contain an emulsifier, stacking a plurality of the fiber cement boards, and curing them in an autoclave. 2. The method for curing a fiber cement board according to claim 1, characterized in that an acrylic ester emulsion is used as the emulsion that does not contain an emulsifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4442189A JPH02225352A (en) | 1989-02-23 | 1989-02-23 | Curing of fiber cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4442189A JPH02225352A (en) | 1989-02-23 | 1989-02-23 | Curing of fiber cement plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02225352A JPH02225352A (en) | 1990-09-07 |
| JPH0521871B2 true JPH0521871B2 (en) | 1993-03-25 |
Family
ID=12691026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4442189A Granted JPH02225352A (en) | 1989-02-23 | 1989-02-23 | Curing of fiber cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02225352A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4559537B1 (en) * | 2010-02-24 | 2010-10-06 | クリオン株式会社 | Method for producing calcium silicate molded body |
| JP4610673B1 (en) * | 2010-04-01 | 2011-01-12 | クリオン株式会社 | Method for producing lightweight cellular concrete panel, lightweight cellular concrete panel, and semi-cured body |
-
1989
- 1989-02-23 JP JP4442189A patent/JPH02225352A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02225352A (en) | 1990-09-07 |
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