JPS63117977A - High strength lightweight calcium silicate formed body and manufacture - Google Patents
High strength lightweight calcium silicate formed body and manufactureInfo
- Publication number
- JPS63117977A JPS63117977A JP26365186A JP26365186A JPS63117977A JP S63117977 A JPS63117977 A JP S63117977A JP 26365186 A JP26365186 A JP 26365186A JP 26365186 A JP26365186 A JP 26365186A JP S63117977 A JPS63117977 A JP S63117977A
- Authority
- JP
- Japan
- Prior art keywords
- calcium silicate
- weight
- parts
- strength
- slurry
- 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.)
- Granted
Links
- 239000000378 calcium silicate Substances 0.000 title claims description 45
- 229910052918 calcium silicate Inorganic materials 0.000 title claims description 45
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 title claims description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 21
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 20
- 239000000839 emulsion Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 12
- 239000012783 reinforcing fiber Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 235000012241 calcium silicate Nutrition 0.000 description 40
- 239000002994 raw material Substances 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229920000609 methyl cellulose Polymers 0.000 description 8
- 239000001923 methylcellulose Substances 0.000 description 8
- 235000010981 methylcellulose Nutrition 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000001027 hydrothermal synthesis Methods 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は高強度軽量ケイ酸カルシウム成形体およびその
製造方法に関するもので必る。ざらに詳しくは、本発明
は高強度かつ軽量で耐火性、寸法安定性にすぐれ木材と
同様の加工性を臭備しており、建築ｌＡ料として好適に
使用することのできるケイ酸カルシウム、保水剤を含有
するエヂレンー酢酸ビニル共重合体および補強繊維から
なるケイ酸カルシウム成形体およびその製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-strength, lightweight calcium silicate molded body and a method for producing the same. More specifically, the present invention is made of calcium silicate, a water-retaining material, which has high strength, light weight, excellent fire resistance, dimensional stability, and processability similar to wood, and can be suitably used as a construction lA material. The present invention relates to a calcium silicate molded body made of an edylene-vinyl acetate copolymer containing an agent and reinforcing fibers, and a method for producing the same.
［従来の技術］
ケイ酸カルシウムは軽量で熱的に安定な物質であり、こ
の特性を利用した成形体が市販されている。このうち軽
量という特性を生かしたちのに断熱材、保温材があり、
また熱的に安定で耐火性という特性を牛かしたちのに珪
カルポードかあり、それぞれ大量に生産されている。し
かし前者は嵩密度が０．３ｇ／ ｃｒｄ以下のものであ
り、後者は嵩密度が０．７ｇ／ ｃｉ以上のものである
。この中間の嵩密度である０、３〜０．７ｇ／ Ｃｒｄ
に相当する成形体については従来はとんど商品化されて
いなかった。[Prior Art] Calcium silicate is a lightweight and thermally stable substance, and molded products utilizing this property are commercially available. Among these, there are insulation materials and heat retention materials that take advantage of their lightweight characteristics.
In addition, silica has the characteristics of thermal stability and fire resistance, and each type is produced in large quantities. However, the former has a bulk density of 0.3 g/crd or less, and the latter has a bulk density of 0.7 g/ci or more. This intermediate bulk density is 0.3~0.7g/Crd
Until now, molded bodies corresponding to the above have not been commercialized.
この嵩密度０．３〜０．７ｇ／Ｃｍという値は天然の木
材のそれとほぼ同じであり、ケイ酸カルシウムを成形し
て人造木材を製造しようとする試みが提案されている。This value of bulk density of 0.3 to 0.7 g/Cm is almost the same as that of natural wood, and an attempt to manufacture artificial wood by molding calcium silicate has been proposed.
すなわち（１）ケイ酸カルシウム水和物１００重量部、
カルボキシル基を含むスヂレンーブタジエン共重合体う
テックス５〜３０重量部（固形分として）、カチオン型
高分子凝集剤および水からなる水性スラリーを成形、乾
燥してなるケイ酸カルシウム成形体（特開昭６０−２４
６２５１号公報）、また（２）ケイ酸カルシウム水和物
スラリーの固形分１００重量部、疎水性のエチレン性不
飽和単量体を乳化剤の不存在下で重合させて得られる重
合体エマルジョン５〜５０相聞部（固形分として）、凝
集剤０．０５〜１５重量部からなる組成物を成形、乾燥
してなるケイ酸カルシウム系成形体く特開昭６１−１７
４６２＠公報）が提案されている。さらに、本出願人も
（３）ケイ酸カルシウム水和物１００重量部、補強繊維
１〜３０重量部および分散剤０．１〜５重量部からなる
ケイ酸カルシウム成形体について提案した（特願昭６０
−２６１３１１号）。That is, (1) 100 parts by weight of calcium silicate hydrate,
A calcium silicate molded body ( Unexamined Japanese Patent Publication 1986-24
6251), and (2) Polymer emulsion 5 obtained by polymerizing 100 parts by weight of solid content of calcium silicate hydrate slurry and a hydrophobic ethylenically unsaturated monomer in the absence of an emulsifier. A calcium silicate-based molded body obtained by molding and drying a composition comprising 50 parts (as solid content) and 0.05 to 15 parts by weight of a flocculant. JP-A-61-17
462@publication) has been proposed. Furthermore, the present applicant also proposed (3) a calcium silicate molded body consisting of 100 parts by weight of calcium silicate hydrate, 1 to 30 parts by weight of reinforcing fibers, and 0.1 to 5 parts by weight of a dispersant (patent application 60
-261311).
［発明が解決しようとする問題点］
しかしく１）の発明の成形体は明細書の実施例によれば
嵩密度０．５ｇ／ ｃｒｄのときの曲げ強度が４０〜１
１０Ｋｇｆ ／ ｃｆｆｌにすぎない。またスヂレンー
ブタジエン共重合体ラテックスは燃焼エンタルピーが高
く、ざらにスチレンは黒煙および悪臭の発生原因となる
ため、耐火性の面から問題がある。[Problems to be Solved by the Invention] However, according to the examples in the specification, the molded article of the invention in 1) has a bending strength of 40 to 1 when the bulk density is 0.5 g/crd.
Only 10Kgf/cffl. Furthermore, styrene-butadiene copolymer latex has a high enthalpy of combustion, and styrene causes black smoke and bad odors, so there is a problem in terms of fire resistance.
また（２）の発明の成形体は耐水性及び強度の問題を解
消しようとするものであり、嵩密度が０．４４〜０．４
８ｇ／ Ｃｒｄで曲げ強度１３０〜１５０Ｋｇｆ ／ｃ
ｒｉであるが、重合体エマルジョンを３０部（固形分）
添加しており耐火性の面で問題がある。Furthermore, the molded article of the invention (2) is intended to solve the problems of water resistance and strength, and has a bulk density of 0.44 to 0.4.
Bending strength 130-150Kgf/c at 8g/Crd
ri, but 30 parts of polymer emulsion (solid content)
There is a problem in terms of fire resistance.
さらに（３）の発明の成形体は（１）の発明の成形体お
よび（２）の発明の成形体に認められた問題点点を解消
しようとするものであり、成形体の嵩密度が０．５ｇ／
ｃｏｄのときの曲げ強度は約１００〜１３０Ｋｇｆ
／ｃｕｒと改善されているが、耐火性の面でいまだ不十
分である。Furthermore, the molded article of the invention (3) is intended to solve the problems observed in the molded article of the invention (1) and the molded article of the invention (2), and the bulk density of the molded article is 0. 5g/
Bending strength when cod is approximately 100-130Kgf
/cur, but the fire resistance is still insufficient.
また耐火性の面から、燃焼エンタルピーが低く、黒煙及
び悪臭の発生が少ないエチレン−酢酸ビニル共重合体エ
マルジョンのラテックスとしての使用も考えられるが、
これらのような成形後に乾燥する製造方法では乾燥時に
エヂレンー酢酸ビニル共重合体被膜が劣化するという問
題点があり、さらに強度の面でも問題があるので使用例
はほとんどない。In addition, from the viewpoint of fire resistance, the use of ethylene-vinyl acetate copolymer emulsion as a latex, which has a low combustion enthalpy and produces little black smoke and bad odor, is also considered.
These manufacturing methods that dry after molding have the problem that the ethylene-vinyl acetate copolymer coating deteriorates during drying, and there are also problems in terms of strength, so there are almost no examples of its use.
［問題点を解決するための手段］
本発明は、ケイ酸カルシウム１００重量部、保水剤を含
有するエヂレンー酢酸ビニル共重合体１〜２０重量部お
よび補強繊維１〜３０重量部からなる高強度軽量ケイ酸
カルシウム成形体とその製造方法に関する。[Means for Solving the Problems] The present invention provides a high-strength, lightweight material comprising 100 parts by weight of calcium silicate, 1 to 20 parts by weight of edylene-vinyl acetate copolymer containing a water retention agent, and 1 to 30 parts by weight of reinforcing fibers. This invention relates to a calcium silicate molded body and its manufacturing method.
本発明のケイ酸カルシウム成形体はケイ酸カルシウムス
ラリー、保水剤を含有するエチレン−酢酸ビニル共重合
体（以下ＥＶＡと略す。）エマルジョンおよび補強繊維
さらに必要に応じて膨張剤、分散剤を混合し、成形した
のち乾燥することによって製造できる。ＥＶＡエマルジ
ョンに保水剤を添加することにより、従来のケイ酸カル
シウム成形体に比べて高強度で耐火性に優れたケイ酸カ
ルシウム成形体を提供することができる。The calcium silicate molded article of the present invention is prepared by mixing a calcium silicate slurry, an ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA) emulsion containing a water-retaining agent, reinforcing fibers, and, if necessary, an expanding agent and a dispersing agent. It can be manufactured by molding and drying. By adding a water retention agent to the EVA emulsion, it is possible to provide a calcium silicate molded body that has higher strength and superior fire resistance than conventional calcium silicate molded bodies.
本発明のケイ酸カルシウムとしては石灰質原料、ケイ酸
質原料および水とから水熱合成反応によって得られた通
常トバモライト、ゾノトライトと呼ばれるケイ酸カルシ
ウムが好適であり、ケイ酸カルシウム成形体の製造に当
たってはケイ酸カルシウムスラリー詳しくはケイ酸カル
シウム水和物水性スラリーとして使用される。石灰質原
料としては生石灰、消石灰等があり、ケイ酸質原料とし
てはケイ石、ケイ砂、フエロシリコンダス１〜などがあ
る。これらは微粉砕物として使用される。石灰質原料、
ケイ酸質原料および水を所定割合に配合し、通常はオー
トクレーブによって水熱合成反応を行なってケイ酸カル
シウム水和物水性スラリー（以下、単にケイ酸カルシウ
ムスラリーと略す。）を得る。石灰質原料とケイ酸質原
料の配合ｖ１合は合成するケイ酸カルシウムの種別、使
用する原料の出所などによって相違するが、例えばゾノ
トライト（６ＣａＯ−６３ｉ ０２−Ｈ２０）を合成す
る場合にはＣａＯ／ＳｉＯ２モル比がほぼ１になるよう
に石灰質原料とケイ酸質原料を配合する。As the calcium silicate of the present invention, calcium silicate usually called tobermorite or xonotlite, which is obtained by hydrothermal synthesis reaction from a calcareous raw material, a silicic raw material, and water, is suitable. Calcium silicate slurry Specifically, it is used as a calcium silicate hydrate aqueous slurry. Examples of calcareous raw materials include quicklime and slaked lime, and examples of silicic raw materials include silica, silica sand, and ferrosilicon dust. These are used as finely ground products. calcareous raw materials,
A silicic acid raw material and water are blended in a predetermined ratio, and a hydrothermal synthesis reaction is carried out, usually in an autoclave, to obtain an aqueous calcium silicate hydrate slurry (hereinafter simply referred to as calcium silicate slurry). The blend v1 of calcareous raw materials and silicic raw materials varies depending on the type of calcium silicate to be synthesized, the source of the raw materials used, etc., but for example, when synthesizing xonotlite (6CaO-63i 02-H20), CaO/SiO2 The calcareous raw material and the silicic acid raw material are blended so that the molar ratio is approximately 1.
また水とこれら原料との配合割合は水／（石灰質原料十
ケイ酸質原料）重量比で５〜１５でおる。The mixing ratio of water and these raw materials is 5 to 15 in terms of water/(calcareous raw material ten silicate raw material) weight ratio.
所定の割合に配合した石灰質原料、ケイ酸質原料および
水の混合物をオー１〜クレープに充填し、１５０〜２５
０℃の温度で１〜２４時間醍拌しながらあるいは断続的
に攪拌しながら水熱合成反応を行なってケイ酸カルシウ
ムスラリーを得る。A mixture of calcareous raw materials, silicic raw materials and water mixed in a predetermined ratio is filled into O-1 to crepes, and the mixture is heated to 150 to 25
A hydrothermal synthesis reaction is carried out at a temperature of 0°C for 1 to 24 hours with stirring or intermittent stirring to obtain a calcium silicate slurry.
次にケイ酸カルシウムスラリー、保水剤を添加したＥＶ
Ａエマルジョンおよび補強繊維などを混合する。Next, EV added calcium silicate slurry and water retention agent.
A. Mix the emulsion and reinforcing fibers.
保水剤としてはメチルセルロース、カルボキシメチルセ
ルロース等のセルロース誘導体、ポリビニルアルコール
、ポリアクリル酸ソーダ、ポリエチレンオキザイド等の
吸水性高分子が使用できる。As the water retention agent, cellulose derivatives such as methylcellulose and carboxymethylcellulose, water-absorbing polymers such as polyvinyl alcohol, sodium polyacrylate, and polyethylene oxide can be used.
保水剤を「Ｖ△エマルジョンに添加することにより、乾
燥時、ＥＶＡエマルジョン近辺の水分蒸発が遅れ、ＥＶ
Ａの造膜が乾燥工程の最終段階でおこるため、ＥＶＡ被
膜の乾燥劣化が少なく、造膜後の水分蒸発のためにＥＶ
Ａ被膜が破損することも防げる。使用量はＥＶＡ１００
重量部に対して０．０１〜２０重量部好ましくは０．２
〜２０重量部でおる。By adding a water retention agent to the V△ emulsion, the evaporation of water near the EVA emulsion during drying is delayed and the EV
Since the film formation of A occurs at the final stage of the drying process, there is little drying deterioration of the EVA film, and EV
It also prevents the A coating from being damaged. The amount used is EVA100
0.01 to 20 parts by weight, preferably 0.2 parts by weight
~20 parts by weight.
ＥＶＡエマルジョンのエチレン／酢酸ビニル重量比およ
び分散剤の種別は特に限定されないが、０．１〜０．２
が好ましい。ＥＶＡは成形体中でケイ酸カルシウム同士
およびケイ酸カルシウムと補強繊維を固着する作用を有
する。それゆえ成形体は高強度を示し、さらに切削加工
時に粉末が飛散せず釘等の保持力が良い等の建築ｉｔΔ
料として優れた加工性を示す。ＥＶＡはケイ酸カルシウ
ム１００重量部に対して１〜４０重量部、好ましくは２
〜１０重量部使用される。ＥＶＡの使用量が少なすぎる
と加工性に難があり強度もやや弱く、また多すぎると耐
火性に問題が生じる。The ethylene/vinyl acetate weight ratio of the EVA emulsion and the type of dispersant are not particularly limited, but are 0.1 to 0.2.
is preferred. EVA has the effect of fixing calcium silicates to each other and calcium silicates to reinforcing fibers in the molded body. Therefore, the molded product exhibits high strength, and furthermore, it has the advantage of being able to hold nails, etc. without scattering powder during cutting.
It shows excellent processability as a raw material. EVA is used in an amount of 1 to 40 parts by weight, preferably 2 parts by weight, per 100 parts by weight of calcium silicate.
~10 parts by weight are used. If the amount of EVA used is too small, processability will be difficult and the strength will be somewhat weak, and if it is too large, problems will arise in fire resistance.
補強繊維としてはガラス繊維等の無機繊維、ナイロン、
ビニロン、ポリプロピレン、レーヨンおよびパルプ等の
有機繊維が使用でき、これらの１種または２種以上を混
合して使用する。補強繊維は成形体の強度および弾性率
を向上させ、製造時のスラリー中で“ケイ酸カルシウム
およびＥＶＡエマルジョンの保持力を向上させて加圧脱
水成形時のろ過分離を良好ならしめる作用があるが、加
工性、耐水性、耐熱性等の面からその使用量はケイ酸カ
ルシウム１００重量部に対して１〜３０重量部好ましく
は３〜１５重量部である。Reinforcing fibers include inorganic fibers such as glass fiber, nylon,
Organic fibers such as vinylon, polypropylene, rayon, and pulp can be used, and one type or a mixture of two or more of these can be used. Reinforcing fibers improve the strength and elastic modulus of the molded product, and have the effect of improving the retention of calcium silicate and EVA emulsion in the slurry during production and improving filtration separation during pressure dehydration molding. In terms of processability, water resistance, heat resistance, etc., the amount used is 1 to 30 parts by weight, preferably 3 to 15 parts by weight, per 100 parts by weight of calcium silicate.
なお以上の物質のほかに分散剤、膨張材およびメチルセ
ルロースの不溶化剤を適宜添加してもよい。In addition to the above-mentioned substances, a dispersant, a swelling agent, and a methyl cellulose insolubilizing agent may be added as appropriate.
ケイ酸カルシウムスラリー、保水剤を添加したエマルジ
ョンおよび補強繊維等の混合は従来通常に使用されてい
る混練機、ニーダ−等を用いて行う。要は各物質が均一
に分散したスラリーを調製すればよい。均一に分散した
スラリーは次に成形される。スラリーの成形法としては
例えば型枠にスラリーを充填して加圧脱水する方法が挙
げられるが、目的、用途に応じて従来公知の成形法が適
宜採用される。成形したのち乾燥すると目的とするケイ
酸カルシウム成形体が得られる。乾燥する際の温度は特
に制限されないが、６０’Ｃ〜１６０°Ｃ通常８０°Ｃ
〜１４０°Ｃの温度が採用される。The calcium silicate slurry, the emulsion containing the water retention agent, the reinforcing fibers, etc. are mixed using a kneader, kneader, etc. that are conventionally used. The point is to prepare a slurry in which each substance is uniformly dispersed. The uniformly dispersed slurry is then shaped. As a method for molding the slurry, for example, a method of filling a mold with the slurry and dehydrating it under pressure can be mentioned, but a conventionally known molding method can be appropriately adopted depending on the purpose and use. After molding and drying, the desired calcium silicate molded body can be obtained. The temperature for drying is not particularly limited, but is 60'C to 160°C, usually 80°C.
A temperature of ~140°C is employed.
以下に本発明の実施例を示すが、本発明は実施例に限定
されない。Examples of the present invention are shown below, but the present invention is not limited to the examples.
［実施例］ 実施例における試験結果は次の方法に依った。[Example] The test results in the examples were based on the following method.
（１）曲げ強度：ＪＩＳＡ”１４０８に準じた。(1) Bending strength: According to JISA"1408.
（２）不燃試験：建設省告示第１８２８号（基材試験）
に準じた。(2) Nonflammability test: Ministry of Construction Notification No. 1828 (base material test)
According to.
（３）加工性 ：かんなかけ、釘打ち、のこぎり引き等
の木材の加工操作を実施した
場合の木材との比較で判定した。(3) Workability: Judgment was made by comparing with wood that has been subjected to wood processing operations such as planing, nailing, sawing, etc.
（４）乾燥時の収縮率ニブレス成形後及び乾燥後の成形
体の厚さを測定し乾燥時の収
縮率を求めた。(4) Shrinkage rate during drying The thickness of the molded product after nibless molding and after drying was measured to determine the shrinkage rate during drying.
実施例１
ケイ石粉と消石灰とを５ｉ０２／ｃａｏのモル比が１に
なる様に混合し、ＣａＯとＳｉＯ２との合計重量に対し
て１０倍量の水を加えてオートクレーブ中で攪拌しなが
ら温度２１０℃、圧力１９Ｋｒｔｆ／ｃｔｉで３時間水
熱合成反応させた。この様にして得られたケイ酸カルシ
ウムスラリーに、保水剤としてメチルセルロース（信越
化学工業■製、商品名メトローズ９０Ｓ ＋−１−４０
００）を含有させたＥＶＡエマルジョン（昭和高分子■
製、商品名ポリゾールＭ−２００）を添加、混合した。Example 1 Silica powder and slaked lime were mixed so that the molar ratio of 5i02/cao was 1, 10 times the amount of water was added to the total weight of CaO and SiO2, and the mixture was heated to 210°C while stirring in an autoclave. A hydrothermal synthesis reaction was carried out at a temperature of 19 Krtf/cti for 3 hours. To the calcium silicate slurry obtained in this way, methylcellulose (manufactured by Shin-Etsu Chemical Co., Ltd., trade name Metrose 90S +-1-40) was added as a water retention agent.
EVA emulsion containing EVA emulsion (Showa Kobunshi ■
(trade name: Polysol M-200) was added and mixed.
添加、混合量は、ケイ酸カルシウムスラリーの固形分１
００重量部に対して、メチルセルロースを重量比で１／
１０含有するＥＶＡエマルジョンをＥＶＡとして５重量
部、ガラス繊維７重量部であった。The addition and mixing amount is 1 solid content of calcium silicate slurry.
00 parts by weight, the weight ratio of methyl cellulose is 1/
The EVA emulsion containing 10% of EVA contained 5 parts by weight of EVA and 7 parts by weight of glass fiber.
得られたケイ酸カルシウム成形体製造用スラリーを３０
Ｘ３０ｃｍの型枠に充填し、３０Ｋｇｆ／ｃｉ−１１＝
の圧力で加圧脱水し、１２０’Ｃで９時間乾燥しケイ酸
カルシウム成形体を得た。The obtained slurry for producing a calcium silicate molded body was
The mixture was filled into a mold of 30 cm x 30 cm, dehydrated under pressure of 30 Kgf/ci-11, and dried at 120'C for 9 hours to obtain a calcium silicate molded body.
成形体の試験結果を第１表に示す。The test results of the molded bodies are shown in Table 1.
実施例２．３
メチルセルロース（信越化学工業■製、商品名メトロー
ズ９０ＳＨ−４０００＞の添加量をＥＶＡに対して重量
比で’Ｉ ／ ５００ 、１ ／ ５０とした以外は実
施例１と同様にして成形体を得た。Example 2.3 The same procedure as in Example 1 was carried out except that the amount of methyl cellulose (manufactured by Shin-Etsu Chemical Co., Ltd., trade name Metrose 90SH-4000) was adjusted to EVA at a weight ratio of 'I/500, 1/50. A molded body was obtained.
４ その試験結果を第１表に示す。4 The test results are shown in Table 1.
比較例１
メチルセルロースを無添加とした以外は実施例１と同様
にして成形体を得た。Comparative Example 1 A molded article was obtained in the same manner as in Example 1 except that methylcellulose was not added.
その試験結果を第１表に示す。The test results are shown in Table 1.
比較例２
メチルセルロース（信越化学工業■製、商品名メトロー
ズ９０Ｓ＋−１−４０００＞の添加量を重量比で１／４
とした以外は実施例１と同様にして成形体を得た。Comparative Example 2 The amount of methylcellulose (manufactured by Shin-Etsu Chemical Co., Ltd., trade name Metrose 90S+-1-4000) was reduced to 1/4 by weight.
A molded body was obtained in the same manner as in Example 1 except for the following.
その試験結果を第１表に示す。The test results are shown in Table 1.
１２ 一
実施例４．５
［＼Ｊハ、エマルジョン（昭和高分子（Ｉ木製、商品名
ポリゾールＭ−２００）の混合量をケイ酸カルシウムス
ラリーの固形分１００重量部に対して７．５．１０．０
重量部とした以外は実施例１と同様にして成形体を得た
。12 Example 4.5 [＼JHa, The amount of emulsion (Showa Kobunshi (I Wooden Co., Ltd., trade name: Polysol M-200) mixed was 7.5.10 per 100 parts by weight of solid content of calcium silicate slurry. .0
A molded article was obtained in the same manner as in Example 1 except that the parts by weight were changed.
その試験結果を第２表に示す。The test results are shown in Table 2.
比較例３．４．５
メチルセルロースを無添加とし、ＥＶＡエマルジョンの
かわりにスチレン−ブタジェン共重合体エマルジョン（
日本ゼオン０禾製、商品名Ｌ×４１６）をケイ酸カルシ
ウムスラリーの固形分１００重量部に対して５．７．５
．１０重量部混合した以外は実施例１と同様にして成形
体を得た。Comparative Example 3.4.5 Methyl cellulose was not added and a styrene-butadiene copolymer emulsion (
5.7.5 parts by weight of solid content of calcium silicate slurry
．． A molded body was obtained in the same manner as in Example 1 except that 10 parts by weight were mixed.
［発明の効果］
本発明は、軽量でおりながら高強度を示し、かつ耐火性
に優れ、建築柵料として木４Ａと同様の加工性を具備す
るケイ酸カルシウム成形体おＪ：びその製造方法を提供
している。[Effects of the Invention] The present invention provides a calcium silicate molded product that is lightweight, exhibits high strength, has excellent fire resistance, and has processability similar to that of wood 4A as a building fence material. providing.
Claims (4)
るエチレン−酢酸ビニル共重合体１〜２０重量部および
補強繊維１〜３０重量部からなる高強度軽量ケイ酸カル
シウム成形体。(1) A high-strength, lightweight calcium silicate molded body comprising 100 parts by weight of calcium silicate, 1 to 20 parts by weight of an ethylene-vinyl acetate copolymer containing a water retention agent, and 1 to 30 parts by weight of reinforcing fibers.
許請求の範囲第（１）項記載の高強度軽量ケイ酸カルシ
ウム成形体。(2) The high-strength, lightweight calcium silicate molded article according to claim (1), wherein the water retention agent is a water-absorbing polymer.
１００重量部に対して０．０１〜２０重量部である特許
請求の範囲第（１）項記載の高強度軽量ケイ酸カルシウ
ム成形体。(3) The high-strength, lightweight calcium silicate molded article according to claim (1), wherein the content of the water retention agent is 0.01 to 20 parts by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer. .
水剤を含有するエチレン−酢酸ビニル共重合体１〜２０
重量部のエマルジョンおよび補強繊維１〜３０重量部を
混合し、脱水プレス成形後乾燥することを特徴とする高
強度軽量ケイ酸カルシウム成形体の製造方法。(4) Ethylene-vinyl acetate copolymer 1 to 20 containing 100 parts by weight of calcium silicate slurry and water retention agent
A method for producing a high-strength, lightweight calcium silicate molded article, which comprises mixing parts by weight of an emulsion and 1 to 30 parts by weight of reinforcing fibers, dehydration press molding, and then drying.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263651A JPH07499B2 (en) | 1986-11-07 | 1986-11-07 | High strength and lightweight calcium silicate compact and method for producing the same |
| DE19873711549 DE3711549C2 (en) | 1986-04-04 | 1987-04-06 | Light calcium silicate article and process for its manufacture |
| US08/395,159 US5580508A (en) | 1986-04-04 | 1995-02-27 | Process for preparing calcium silicate articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263651A JPH07499B2 (en) | 1986-11-07 | 1986-11-07 | High strength and lightweight calcium silicate compact and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63117977A true JPS63117977A (en) | 1988-05-21 |
| JPH07499B2 JPH07499B2 (en) | 1995-01-11 |
Family
ID=17392435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61263651A Expired - Lifetime JPH07499B2 (en) | 1986-04-04 | 1986-11-07 | High strength and lightweight calcium silicate compact and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07499B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992962A (en) * | 1982-11-17 | 1984-05-29 | 日本インシュレーション株式会社 | Water-repellent calcium silicate formed body |
-
1986
- 1986-11-07 JP JP61263651A patent/JPH07499B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992962A (en) * | 1982-11-17 | 1984-05-29 | 日本インシュレーション株式会社 | Water-repellent calcium silicate formed body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07499B2 (en) | 1995-01-11 |
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