JP3245487B2 - Method for producing inorganic multilayer molded article - Google Patents
Method for producing inorganic multilayer molded articleInfo
- Publication number
- JP3245487B2 JP3245487B2 JP27053993A JP27053993A JP3245487B2 JP 3245487 B2 JP3245487 B2 JP 3245487B2 JP 27053993 A JP27053993 A JP 27053993A JP 27053993 A JP27053993 A JP 27053993A JP 3245487 B2 JP3245487 B2 JP 3245487B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- parts
- weight
- multilayer molded
- inorganic multilayer
- 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 - Fee Related
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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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)
- Producing Shaped Articles From Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は建築および土木用材料と
して使用される無機質多層成形物の製造方法に関する。
詳しくは石灰質粉末とシリカ質粉末を主成分とする層間
剥離しにくい無機質多層成形物の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic multilayer molded product used as a material for building and civil engineering.
More specifically, the present invention relates to a method for producing an inorganic multilayer molded product mainly composed of calcareous powder and siliceous powder, which is hard to delaminate.
【０００２】[0002]
【従来の技術】従来より耐火性、断熱性および強度に優
れた建材および土木用資材として珪酸カルシウム板やセ
メント系無機質板が木質板に替わって広く使用されつつ
あるが、これらの無機質板はセメント、消石灰、生石灰
等の石灰質粉体とシリカ質粉体からなる水硬性組成物に
パーライトの様な軽量化材や金属石鹸の様な撥水剤およ
び補強繊維等を添加した配合物を適量の水と混ぜてスラ
リーとし、抄造法でシート状にしたものを多層に積層し
加圧成形したものを常温養生あるいは常圧下での加熱養
生により水和硬化して製造していた。2. Description of the Related Art Conventionally, calcium silicate plates and cement-based inorganic plates have been widely used in place of wood plates as building materials and civil engineering materials having excellent fire resistance, heat insulating properties and strength. , A mixture of calcareous powders such as slaked lime and quick lime and a siliceous powder to which a lightening material such as pearlite, a water repellent such as metal soap, and reinforcing fibers have been added to an appropriate amount of water. Into a slurry, formed into a sheet by a papermaking method, laminated in multiple layers, and press molded, and then hydrated and cured by curing at room temperature or by heating under normal pressure.
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来のよう
にして成形して得られた無機質多層成形物は抄造時に比
重の小さいパーライトや金属石鹸などの成分が各シート
の表層部に集まりやすく、そのようなシートを積層した
成形物は層間剥離を生じやすいという傾向があった。こ
の傾向は近年補強繊維としての石綿が発癌性物質である
との理由から使用が控えられるに至ってますます大きな
問題となってきた。本発明は上記問題点を解決すること
を目的として為されたものであり、耐層間剥離性の優れ
た無機質多層成形物の製造方法を提供することにある。However, in the inorganic multilayer molded product obtained by molding in the conventional manner, components such as pearlite and metallic soap having a small specific gravity tend to collect on the surface layer of each sheet during papermaking. A molded product obtained by laminating such sheets tends to easily cause delamination. This tendency has become an increasingly serious problem in recent years, as the use of asbestos as a reinforcing fiber has been curtailed because it is a carcinogenic substance. The present invention has been made for the purpose of solving the above problems, and an object of the present invention is to provide a method for producing an inorganic multilayer molded article having excellent delamination resistance.
【０００４】[0004]
【課題を解決するための手段】本発明者等は上記の問題
点を解決すべく種々研究の結果、石灰質粉末、シリカ質
粉末および補強繊維からなる水硬性配合組成物１００重
量部に対して、ポリビニルアルコール系重合体粉末を
０．１〜１０重量部添加し、均一混合した水系スラリー
組成物を抄き上げて多層に積層した物を加圧成形し、１
２０〜２００℃でオートクレーブ養生することを特徴と
する無機質多層成形物の製造方法を見出し、本発明を完
成するに到った。The present inventors have conducted various studies to solve the above-mentioned problems, and as a result, based on 100 parts by weight of a hydraulic compound composition comprising calcareous powder, siliceous powder and reinforcing fibers, Polyvinyl alcohol-based polymer powder was added in an amount of 0.1 to 10 parts by weight, a uniformly mixed aqueous slurry composition was formed, and a multilayered product was subjected to pressure molding.
The present inventors have found a method for producing an inorganic multilayer molded product, which is characterized by performing autoclave curing at 20 to 200 ° C., and have completed the present invention.
【０００５】本発明に於ける石灰質粉末とは、通常のポ
ルトランドセメント、生石灰、消石灰などを指す。シリ
カ粉末とは、セメント分野でポゾランと称されている石
灰と水の存在下で徐々に水硬性を発揮するもので、珪石
粉、フライアッシュ、高炉スラグ粉末、シリカヒュー
ム、珪藻土等のシリカ分の含有率の高い無機粉体などを
指す。補強繊維とは、ガラス繊維、炭素繊維、パルプ繊
維、ビニロンやポリプロ等の合成繊維などを指す。さら
に、本発明においては、骨材、細骨材などを併用するの
が好ましく、その一例としては、砂や砕石の他にパーラ
イトなどの中空骨材が挙げられる。[0005] The calcareous powder in the present invention refers to ordinary Portland cement, quicklime, slaked lime and the like. Silica powder is a material that gradually exhibits hydraulic properties in the presence of lime and water, which are called pozzolans in the cement field, and contains silica particles such as silica powder, fly ash, blast furnace slag powder, silica fume, and diatomaceous earth. It refers to inorganic powder with a high content. The reinforcing fibers refer to glass fibers, carbon fibers, pulp fibers, synthetic fibers such as vinylon and polypropylene. Further, in the present invention, it is preferable to use aggregates, fine aggregates and the like, and examples thereof include hollow aggregates such as pearlite in addition to sand and crushed stone.
【０００６】石灰質、シリカ質粉末、補強繊維および骨
材の配合割合については特に制限はないが、石灰質１０
０重量部に対してシリカ質粉末３０〜２００重量部、補
強繊維２〜３０重量部および骨材４〜７０重量部が好ま
しい。The mixing ratio of calcareous, siliceous powder, reinforcing fiber and aggregate is not particularly limited.
30 to 200 parts by weight of the siliceous powder, 2 to 30 parts by weight of the reinforcing fiber, and 4 to 70 parts by weight of the aggregate are preferred based on 0 part by weight.
【０００７】本発明に於けるポリビニルアルコール系重
合体（以下ＰＶＡと略記する）粉末としては、変性され
ていない通常のＰＶＡおよび各種の変性ＰＶＡ粉末が用
いられる。ＰＶＡの重合度としては特に制限はないが、
好ましくは５００以上、より好ましくは１５００以上で
ある。鹸化度としても特に制限はないが、好ましくは８
０モル％以上、より好ましくは９０モル％以上、さらに
より好ましくは９５モル％以上である。ＰＶＡ粉末の平
均粒径は特に制限はないが、好ましくは１６メッシュパ
ス、より好ましくは５０メッシュパスである。ＰＶＡ粉
末の添加量は、石灰質粉末、シリカ質粉末および補強繊
維よりなる水硬性配合組成物１００重量部に対して、
０．１〜１０重量部添加する。０．１重量部より少ない
と添加の効果が得られず、１０重量部より多く添加する
とオートクレーブ養生時に、幾分膨張し厚みが増して、
その結果、強度および耐層間剥離性が低下するので好ま
しくない。As the polyvinyl alcohol polymer (hereinafter abbreviated as PVA) powder in the present invention, ordinary unmodified PVA and various modified PVA powders are used. The degree of polymerization of PVA is not particularly limited,
Preferably it is 500 or more, more preferably 1500 or more. The degree of saponification is not particularly limited, but is preferably 8
It is 0 mol% or more, more preferably 90 mol% or more, and still more preferably 95 mol% or more. The average particle size of the PVA powder is not particularly limited, but is preferably 16 mesh passes, more preferably 50 mesh passes. The amount of the PVA powder added is based on 100 parts by weight of the hydraulic compound composition composed of calcareous powder, siliceous powder and reinforcing fibers.
0.1 to 10 parts by weight are added. If the amount is less than 0.1 part by weight, the effect of the addition cannot be obtained.
As a result, the strength and the delamination resistance are reduced, which is not preferable.
【０００８】さらに、高性能の成形物の強度および耐層
間剥離性を発現させるために、硼酸、硼砂、硼酸カルシ
ウム、硼酸エステル等の硼酸化合物の併用が好ましい。
また本発明には上記以外の添加物を本発明に支障のない
限り併用使用しても差し支えない。Further, in order to develop the strength and delamination resistance of a high-performance molded product, it is preferable to use a boric acid compound such as boric acid, borax, calcium borate, borate ester and the like.
In the present invention, additives other than the above may be used in combination as long as they do not interfere with the present invention.
【０００９】本発明におけるオートクレーブ養生は、１
２０〜２００℃で行われる。オートクレーブ養生の時間
としては３〜２４時間が好ましい。尚、オートクレーブ
養生に先だって、５〜８０℃で１２〜３０時間の一次養
生を行うことが好ましく、一次養生は常圧の飽和蒸気圧
下でのスチーム養生がより好ましい。[0009] The autoclave curing in the present invention is 1
Performed at 20-200 ° C. The autoclave curing time is preferably 3 to 24 hours. Prior to the autoclave curing, it is preferable to perform primary curing at 5 to 80 ° C. for 12 to 30 hours, and it is more preferable that the primary curing be steam curing under a saturated vapor pressure of normal pressure.
【００１０】[0010]
【実施例】以下に実施例を挙げて本発明を更に詳しく説
明するが、本発明はこれによって限定されるものではな
い。実施例中特に断わりのないかぎり、「％」および
「部」は重量基準を表す。EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. In Examples, unless otherwise specified, "%" and "part" are based on weight.
【００１１】[0011]
嵩比重：ＪＩＳ Ａ５４１３に準拠し、試験片を１００
℃で２４時間乾燥後の重量と体積より求めた。 剥離強度：積層成形物の両面に金属治具を接着し、２ｍ
ｍ／分の速度で垂直剥離しその剥離力を求めた。 曲げ強度：ＪＩＳ Ａ１４０８「建築ボード類の曲げ試
験法」に準拠し、スパン長５ｃｍで測定した。Bulk specific gravity: 100% of test piece according to JIS A5413
It was determined from the weight and volume after drying at 24 ° C. for 24 hours. Peel strength: Adhesion of metal jig on both sides of laminated molded product, 2m
Peeling was performed vertically at a speed of m / min, and the peeling force was determined. Flexural strength: Measured at a span length of 5 cm according to JIS A1408 "Bending test method for building boards".
【００１２】実施例１ ポルトランドセメント４８部、珪石粉３２部、パーライ
ト１５部からなる配合物９５部に対して、重合度１７５
０、鹸化度９８モル％のＰＶＡ（クラレ製、ＰＶＡ−１
１７）の６０メッシュパス粉末５部を添加し、混合した
粉体を叩解パルプ５部を予め水に離解した分散液に投入
撹拌してスラリーを調製後、抄造して、厚さ２ｍｍのウ
エットシートを造り、それを逐次８枚積層した後、厚み
１０ｍｍにプレス成形し、室温下２４時間１次養生した
後、１６０℃で１０時間のオートクレーブ養生をして無
機質成形物を製造した。結果を表１に示す。併せて、Ｐ
ＶＡを添加しない場合を比較例１として表１に示す。EXAMPLE 1 A polymerization degree of 175 was added to 95 parts of a mixture consisting of 48 parts of Portland cement, 32 parts of silica powder and 15 parts of pearlite.
0, PVA having a saponification degree of 98 mol% (manufactured by Kuraray, PVA-1
5) 60 mesh pass powder of 5) was added, and the mixed powder was put into a dispersion prepared by disintegrating 5 parts of beaten pulp into water and stirred to prepare a slurry. After sequentially laminating eight sheets, the resultant was press-molded to a thickness of 10 mm, primary cured at room temperature for 24 hours, and then autoclaved at 160 ° C. for 10 hours to produce an inorganic molded article. Table 1 shows the results. In addition, P
Table 1 shows the case where VA was not added as Comparative Example 1.
【００１３】実施例２ 実施例１に於いてＰＶＡ粉末添加時に、ほう酸粉末０．
５部を併用添加して同様に製造した。結果を表１に示
す。Example 2 In Example 1, when the PVA powder was added, the amount of boric acid
5 parts were added in combination to produce the same. Table 1 shows the results.
【００１４】比較例２ 実施例１に於いてＰＶＡの添加量を１５部にした以外
は、実施例１と同様にして成形物を製造した。結果を表
１に示す。Comparative Example 2 A molded product was produced in the same manner as in Example 1 except that the amount of PVA was changed to 15 parts. Table 1 shows the results.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】本発明によると、強度に優れるととも
に、耐層間剥離性に優れた無機質多層成形物が得られ
る。According to the present invention, an inorganic multilayer molded article having excellent strength and excellent delamination resistance can be obtained.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０４Ｂ 40/02 Ｃ０４Ｂ 40/02 //(Ｃ０４Ｂ 28/18 (Ｃ０４Ｂ 28/18 24:26 24:26 Ｂ 14:18 14:18 16:02） 16:02） Ｚ 103:60 103:60 (58)調査した分野(Int.Cl.7，ＤＢ名) B28B 1/52 B28B 3/02 C04B 7/13 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI C04B 40/02 C04B 40/02 // (C04B 28/18 (C04B 28/18 24:26 24:26 B 14:18 14: 18 16:02) 16:02) Z 103: 60 103: 60 (58) Field surveyed (Int. Cl. 7 , DB name) B28B 1/52 B28B 3/02 C04B 7/13
Claims (1)
維よりなる水硬性配合組成物１００重量部に対して、ポ
リビニルアルコール系重合体粉末を０．１〜１０重量部
添加し、均一混合した水系スラリー組成物を抄き上げて
多層に積層した物を加圧成形し、１２０〜２００℃でオ
ートクレーブ養生することを特徴とする無機質多層成形
物の製造方法。An aqueous slurry obtained by adding 0.1 to 10 parts by weight of a polyvinyl alcohol-based polymer powder to 100 parts by weight of a hydraulic compound composition comprising calcareous powder, siliceous powder and reinforcing fibers, and uniformly mixing the resulting mixture. A method for producing an inorganic multilayer molded product, comprising forming a composition, forming a multilayered product, and subjecting the composition to pressure molding and autoclaving at 120 to 200 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27053993A JP3245487B2 (en) | 1993-10-28 | 1993-10-28 | Method for producing inorganic multilayer molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27053993A JP3245487B2 (en) | 1993-10-28 | 1993-10-28 | Method for producing inorganic multilayer molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07117027A JPH07117027A (en) | 1995-05-09 |
| JP3245487B2 true JP3245487B2 (en) | 2002-01-15 |
Family
ID=17487610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27053993A Expired - Fee Related JP3245487B2 (en) | 1993-10-28 | 1993-10-28 | Method for producing inorganic multilayer molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3245487B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7905956B2 (en) | 2006-02-15 | 2011-03-15 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7828892B2 (en) | 2004-08-31 | 2010-11-09 | Nichiha Corporation | Inorganic board and a method for the manufacturing thereof |
| JP4648668B2 (en) * | 2004-08-31 | 2011-03-09 | ニチハ株式会社 | Inorganic board and method for producing the same |
| US7722964B2 (en) | 2006-04-25 | 2010-05-25 | Nichiha Corporation | Fiber reinforced cement board and manufacturing process |
| US7758694B2 (en) | 2006-05-11 | 2010-07-20 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7976626B2 (en) | 2006-09-27 | 2011-07-12 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7837788B2 (en) | 2006-09-27 | 2010-11-23 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7972433B2 (en) | 2006-12-27 | 2011-07-05 | Nichiha Co., Ltd. | Fiber reinforced cement composition and products and manufacturing process |
| US7967907B2 (en) | 2007-01-26 | 2011-06-28 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7879145B2 (en) | 2007-02-14 | 2011-02-01 | Nichiha Corporation | Inorganic composition and products and manufacturing process |
| JP6189162B2 (en) * | 2013-09-30 | 2017-08-30 | 大建工業株式会社 | Calcium silicate plate and method for producing the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125264A (en) * | 1980-03-06 | 1981-10-01 | Kuraray Co | Fiber reinforced cement product |
| JPS6296354A (en) * | 1985-10-21 | 1987-05-02 | 株式会社クラレ | Hydraulic inorganic papered product and manufacture |
| JP2948884B2 (en) * | 1990-08-24 | 1999-09-13 | 株式会社クラレ | Fiber reinforced hydraulic molding |
| JP3084139B2 (en) * | 1991-06-24 | 2000-09-04 | 株式会社クラレ | Fiber reinforced hydraulic molding |
| JP3090759B2 (en) * | 1992-01-21 | 2000-09-25 | 株式会社クラレ | Method for producing hydraulic molded product |
-
1993
- 1993-10-28 JP JP27053993A patent/JP3245487B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7905956B2 (en) | 2006-02-15 | 2011-03-15 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07117027A (en) | 1995-05-09 |
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