JPH03231803A - Manufacture of non-asbestos slate - Google Patents
Manufacture of non-asbestos slateInfo
- Publication number
- JPH03231803A JPH03231803A JP2599890A JP2599890A JPH03231803A JP H03231803 A JPH03231803 A JP H03231803A JP 2599890 A JP2599890 A JP 2599890A JP 2599890 A JP2599890 A JP 2599890A JP H03231803 A JPH03231803 A JP H03231803A
- Authority
- JP
- Japan
- Prior art keywords
- water content
- asbestos
- press
- asbestos slate
- raw
- 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
- 239000010425 asbestos Substances 0.000 title claims abstract description 34
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 34
- 239000010454 slate Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 230000005484 gravity Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 239000000378 calcium silicate Substances 0.000 description 4
- 229910052918 calcium silicate Inorganic materials 0.000 description 4
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229910001737 paragonite Inorganic materials 0.000 description 1
- 229910001562 pearlite Inorganic materials 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
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はノンアスベストスレートの製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing non-asbestos slate.
［従来の技術］
従来より石綿スレートは内外装用建材として幅広く利用
されてきた０石綿スレートの基本的な製造方法は、抄造
法により生板を形成し、これをノンプレスのままあるい
はプレス成形した後、養生硬化させるものである。[Conventional technology] Asbestos slate has traditionally been widely used as an interior and exterior building material.The basic manufacturing method for zero-asbestos slate is to form a raw board using the papermaking method, and then either leave it unpressed or after press forming. , curing and hardening.
また、プレス成形の応用として生板を複数枚積層した後
、プレス成形し、養生硬化させることにより生板を一体
化させる技術がある（以下、積層プレス法と記載する）
０例えば波型スレートの場合、所定の生板厚さの半分の
厚さの生板を２枚積層し、プレス成形する技術がある。In addition, as an application of press forming, there is a technique that integrates the green boards by stacking multiple sheets of raw boards, press forming them, and curing and hardening them (hereinafter referred to as the laminated press method).
0 For example, in the case of corrugated slate, there is a technique of laminating two sheets of raw board with a thickness that is half the thickness of a predetermined thickness of the raw board and press-forming them.
これにより波型付けをより容易に且つ生板を痛めないよ
うに行うことができる。This allows corrugation to be performed more easily and without damaging the raw board.
更に、抄造法では得にくい厚物フラット板の製造に際し
ても、積層プレス法が用いられてきた。Furthermore, the laminated press method has been used to manufacture thick flat plates that are difficult to obtain using the papermaking method.
最近では、石膏板の製造方法（特開昭６０−１９０３４
３号公報）や珪酸カルシウム水和物抄造板の製造方法（
特願昭６３−２４２２３８号）においても積層プレス法
技術が応用されている。Recently, a method for manufacturing gypsum board (Japanese Unexamined Patent Publication No. 60-19034
Publication No. 3) and method for producing calcium silicate hydrate paperboard (
The laminated pressing technique is also applied in Japanese Patent Application No. 63-242238).
積層プレス法を使用する場合、石綿スレートではプレス
成形を行う際、最終製品の比重に応じた圧力でプレス成
形を行った後、養生硬化を行えば充分に一体化した硬化
体を得ることができ、生板積層面における界面剥離現象
は生じなかった。この点は、抄造繊維石膏板における積
層プレス法の適用についても同様である。When using the laminated press method, when asbestos slate is press-formed, it is possible to obtain a sufficiently integrated hardened product by press-forming with a pressure that corresponds to the specific gravity of the final product and then curing and curing. , no interfacial peeling phenomenon occurred on the raw board laminated surface. The same applies to the application of the laminated press method to paper-made fiber gypsum boards.
［発明が解決しようとする課題］
一方、ノンアスベストスレートの製造において、石綿ス
レートにおける積層プレス法をそのまま適用した場合、
生板間の密着が石綿スレートはど充分ではないため、製
品に剥離現象を生じ易いという問題点があった。[Problems to be Solved by the Invention] On the other hand, in the production of non-asbestos slate, if the lamination press method for asbestos slate is applied as is,
Asbestos slate does not have sufficient adhesion between green plates, so there is a problem in that products tend to peel off.
積層プレス法によるノンアスベストセメント板の製造方
法としては、特開昭６１−２８５４７号公報が提案され
ているが、この技術は原料として非晶質シリカ粉末の使
用を必須条件としており、且つ積層した生板を圧力的４
０ ｋｇ／ ０ｍ２以上、望ましくは約５０ ｋｇ／
ｅ鋤２で圧縮することにより一体化を行っている。しか
し、積層プレス法による生板の一体化は単にプレス圧力
条件だけではなく、プレス保持時間、昇圧速度等多くの
要因が関係しているため、この技術は極めて限定された
範囲においてのみ有効なものであって、ノンアスベスト
スレートの積層プレス法を可能とする根本的な技術とは
なりえなかった。Japanese Patent Application Laid-Open No. 61-28547 proposes a method for manufacturing non-asbestos cement boards using a laminated press method, but this technology requires the use of amorphous silica powder as a raw material, and Raw plate under pressure 4
0 kg/0m2 or more, preferably about 50 kg/
Integration is performed by compressing with e-plow 2. However, the integration of raw plates using the laminated press method involves not only press pressure conditions but also many factors such as press holding time and pressure increase rate, so this technology is only effective in a very limited range. Therefore, it could not become a fundamental technology that would enable the lamination pressing method of non-asbestos slate.
［課題を解決するための手段〕
本発明者らは従来の製造設備で積層プレス法の適用が可
能なノンアスベストスレートの製造方法の開発を目的と
して鋭意研究の結果、係る課題を解決できることを見出
し、本発明を完成するに至った。[Means for Solving the Problems] As a result of intensive research aimed at developing a manufacturing method for non-asbestos slate that can be applied using the laminated press method using conventional manufacturing equipment, the present inventors have discovered that the problems can be solved. , we have completed the present invention.
即ち、本発明は石綿以外の繊維質原料とマトリックス形
成用粉体原料を湿式混合し、抄造法により形成した生板
を複数枚積層した後、プレス成形を行い、養生硬化する
ことからなるノンアスベストスレートの製造方法におい
て、プレス成形前の生板含水率を３３％以上とし且つプ
レス成形による生板含水率の低下量を１０％以上とする
ことを特徴とするノンアスベストスレートの製造方法に
係る。That is, the present invention produces a non-asbestos material by wet-mixing a fibrous raw material other than asbestos and a powder raw material for forming a matrix, laminating a plurality of green boards formed by a paper-making method, press-forming them, and curing and hardening them. The present invention relates to a method for producing non-asbestos slate, characterized in that the water content of the green board before press forming is 33% or more, and the amount of decrease in the water content of the green board by press forming is 10% or more.
［作 用コ
本発明は抄造法により得られたノンアスベストスレート
生板をＭ層してプレス成形する際、プレス前の生板含水
率を３３％以上とし且つプレス成形により生板含水率を
１０％以上に低下させることに特徴を有し、しかる後養
生硬化を経てノンアスベストスレートを得るものである
。[Function] In the present invention, when M layers of non-asbestos slate raw boards obtained by the paper-making method are press-molded, the moisture content of the raw boards before pressing is set to 33% or more, and the water content of the raw boards is reduced to 10% by press-forming. % or more, and then undergoes curing and hardening to obtain non-asbestos slate.
ここで、本明細書に記載する生板含水率は以下の式によ
り規定することができる：
水車変化を生じさせることにより、ノンアスベストスレ
ートの製造において、製品に剥離現象を生じさせること
なく、積層プレス法を適用することができる。Here, the moisture content of the green board described in this specification can be defined by the following formula: By causing the water wheel change, in the production of non-asbestos slate, it is possible to stack the laminated board without causing any peeling phenomenon in the product. A press method can be applied.
プレス成形前の生板含水率が３３％未満であったり、プ
レス成形による生板含水率の低下量が１０％に満たない
場合には、充分な密着効果が得られず、剥離現象を解決
するには至らない。If the moisture content of the raw board before press forming is less than 33%, or if the amount of decrease in the moisture content of the raw board due to press forming is less than 10%, sufficient adhesion effect will not be obtained and the peeling phenomenon will not be resolved. It doesn't reach that point.
本発明のノンアスベストスレートの製造方法における積
層プレス法を実施するに際し、プレス前の生板含水率を
３３％以上とする方法としては、抄造法によって生板を
得る際、３３％以上の含水率となるように抄造する。抄
造した生板に対し、プレス成形する前に散水することに
より含水率を３３％以上とするいずれの方法を用いても
よい。When carrying out the lamination pressing method in the method for manufacturing non-asbestos slate of the present invention, a method for increasing the water content of green board before pressing to 33% or more is as follows: Make the paper so that it becomes . Any method may be used to increase the water content to 33% or more by sprinkling water on the paper-formed raw board before press-forming.
本発明方法は、積層した生板を製品１枚ごとにプレス成
形していく場合にも、製品１枚分に相当する生板を１’
ｉｔ［た後、セパレーターとなる板を介し、その上に更
に生板を積層していくことにより製品複数枚数分を１度
にプレス成形する場合にも適用することができる。In the method of the present invention, even when press-forming laminated raw boards one product at a time, the raw boards equivalent to one product can be
It can also be applied to the case where a plurality of products are press-formed at one time by further laminating green plates on top of the separator plate through the separator plate.
プレス成形を行う際の操作及び圧力は、プレス成形によ
る含水率の低下量を１０％以上とすることができれば、
いずれの方法をも使用することができ、実際には製造製
品の所望とする嵩比重によって規定される。The operation and pressure during press molding are such that if the amount of moisture content reduction due to press molding can be reduced by 10% or more,
Either method can be used and is actually defined by the desired bulk density of the manufactured product.
本発明に使用する繊維質原料としては、セルロースパル
プ、合成バルブ、ガラス繊維、ＰＶＡ繊維、ＰＡＮ繊維
、アラミド繊維、カーボン繊維等公知のいずれの繊維も
用いることができる。As the fibrous raw material used in the present invention, any known fibers such as cellulose pulp, synthetic bulbs, glass fibers, PVA fibers, PAN fibers, aramid fibers, and carbon fibers can be used.
また、マトリックス形成用粉体原料及び養生硬化方法は
下記の２種類に大別される：
■ポルトランドセメントを主原料とし、自然養生、蒸気
養生、水中養生等によりポルトランドセメントの水和反
応を行い硬化させる：
■石灰質原料（消石灰、ポルトランドセメント等）と珪
酸質原料（珪砂、珪藻土、シリカフニーム、フライアッ
シュ等）を主原料とし、オートクレーブ養生により珪酸
カルシウム水和物を生成することにより硬化させる（註
：ポルトランドセメントには珪酸質成分も含まれている
）。In addition, the powder raw materials for matrix formation and curing hardening methods are roughly divided into the following two types: ■Portland cement is used as the main raw material, and it is hardened by hydration reaction of Portland cement through natural curing, steam curing, water curing, etc. ■The main raw materials are calcareous raw materials (slaked lime, Portland cement, etc.) and silicic raw materials (silica sand, diatomaceous earth, silica hneem, fly ash, etc.), and are hardened by producing calcium silicate hydrate through autoclave curing (Note: (Portland cement also contains silicic acid components).
ここで、繊維質原料とマトリックス形成用粉体原料の配
合割合は２：９８〜１５：８５程度の範囲内である。Here, the blending ratio of the fibrous raw material and the matrix-forming powder raw material is within the range of about 2:98 to 15:85.
なお、上記の繊維質原料及びマトリックス形成用粉体原
料よりなる構成原料に必要に応じて下記の物質を添加す
ることができる：
■つオラストナイト、トバモライト、ゾノトライト等の
珪酸カルシウム粉末：
■マスコバイト、バイオタイト、パラゴナイト、セリサ
イト等の雲母鉱物粉末；
■パーライト、炭酸カルシウム粉末等の無機質充填材：
■ベントナイト、カオリナイト、バーミキュライト等の
粘土鉱物粉末；
■パリゴルスカイト、セビオライト等の繊維質鉱物：
■ゼオライト等の多孔質鉱物粉末；
■ポルトランドセメントを主原料とし、自然養生、蒸気
養生、水中養生等により硬化させる場合、珪砂、珪藻土
、シリカフニーム、フライアッシュ等の珪酸質粉末。The following substances can be added to the above-mentioned fibrous raw materials and matrix-forming powder raw materials as necessary: ■ Calcium silicate powder such as alastonite, tobermorite, and xonotrite: ■ Masco Mica mineral powders such as bite, biotite, paragonite, and sericite; ■Inorganic fillers such as pearlite and calcium carbonate powders; ■Clay mineral powders such as bentonite, kaolinite, and vermiculite; ■Fibrous minerals such as palygorskite and seviolite: ■Porous mineral powder such as zeolite; ■Silicic acid powder such as silica sand, diatomaceous earth, silica hneem, fly ash, etc. when Portland cement is the main raw material and is hardened by natural curing, steam curing, underwater curing, etc.
これらの成分は上記構成原料に総量で３５重量％を上回
らない範囲で配合することができる。These components can be blended in the above constituent raw materials in a total amount not exceeding 35% by weight.
本発明方法において、抄造法としては特に限定されるも
のではなく、丸網抄造法、長網抄造法、フローオン法な
どがあるが、いずれの方法をも用いることができる。In the method of the present invention, the paper making method is not particularly limited, and examples include the round net paper making method, the Fourdrinier paper making method, the flow-on method, and any of these methods can be used.
［実 施 例］ 以下に実施例を挙げて本発明方法を更に説明する。[Example] The method of the present invention will be further explained below with reference to Examples.
実施例１
ポルトランドセメント８４重量％、珪酸カルシウム粉末
１０重量％、ＰＶＡ繊維１重量％、パル１５重量％に原
料固形分に対し１０倍の水を加え、混練したスラリーを
丸網抄造機により抄造し、厚さ５．３ｍ＋＊で、含水率
３４％の生板を得た。この生板を２枚積層し、１５０ｋ
ｇ／ｃＩ１１２で加圧成形して含水率を１５％低下させ
、厚さ８．０ａｍで含水率１９％のフラット板を作成し
た。これを２週間自然養生し、ノンアスベストフラット
板を得た。Example 1 84% by weight of Portland cement, 10% by weight of calcium silicate powder, 1% by weight of PVA fiber, and 15% by weight of Pal were mixed with 10 times the amount of water based on the solid content of the raw materials, and the kneaded slurry was made into paper using a circular mesh papermaking machine. A raw board with a thickness of 5.3 m+* and a moisture content of 34% was obtained. Two sheets of this raw board are laminated, 150k
A flat plate having a thickness of 8.0 am and a moisture content of 19% was produced by pressure molding at 112 g/cI to reduce the moisture content by 15%. This was naturally cured for two weeks to obtain a non-asbestos flat board.
得られたノンアスベストフラット板の嵩比重は１．７５
であり、曲げ強度（気乾）は３２０ ｋｇ７０ｍ２で、
剥離現象は認められなかった。The bulk specific gravity of the obtained non-asbestos flat plate was 1.75.
The bending strength (air dry) is 320 kg 70 m2,
No peeling phenomenon was observed.
実施例２
実施例１と同一の配合及び操作により厚さ３．４ｍｍで
、含水率３８％の生板を得た。この生板を２枚積層し、
７０ｋｇ／ｃＩ１２で加圧成形して含水率を１１％低下
させ、厚さ５．７１で、含水率２７％の波板を作成した
。これを２週間自然養生し、ノンアスベスト波板を得た
。Example 2 A green board with a thickness of 3.4 mm and a moisture content of 38% was obtained using the same formulation and operation as in Example 1. Laminate two of these raw boards,
Pressure molding was performed at 70 kg/cI12 to reduce the water content by 11%, and a corrugated sheet with a thickness of 5.71 and a water content of 27% was created. This was naturally cured for two weeks to obtain a non-asbestos corrugated sheet.
得られたノンアスベスト波板の嵩比重は１．５８であり
、曲げ破壊荷重は５２０ｋｙで、剥離現象は認められな
かった。The bulk specific gravity of the obtained non-asbestos corrugated sheet was 1.58, the bending breaking load was 520 ky, and no peeling phenomenon was observed.
比較例１
実施例１と同一条件にて厚さ５．２ｍｍで、含水率３４
％の生板を得た。この生板を２枚積層し、１３０ ｋｇ
／ ｃｍ’で加圧成形して含水率を８％低下させ、厚さ
８，１１で含水率２６％のフラット板を作成した。これ
を２週間自然養生し、ノンアスベストフラット板を得た
。Comparative Example 1 Under the same conditions as Example 1, the thickness was 5.2 mm and the moisture content was 34.
% fresh board was obtained. Two of these raw boards are stacked together and weigh 130 kg.
/ cm' to reduce the water content by 8%, and a flat plate with a thickness of 8.11 and a water content of 26% was created. This was naturally cured for two weeks to obtain a non-asbestos flat board.
得られたノンアスベストフラット板の嵩比重は１．６６
であり、曲げ強度は２５０ ｋｇ／ ａｍ２で、積層面
に部分的な剥離現象が認められ、曲げ強度も実施例１と
比較して「嵩比重二乗則」で予想される以上の低下を示
した。The bulk specific gravity of the obtained non-asbestos flat plate was 1.66.
The bending strength was 250 kg/am2, and a partial peeling phenomenon was observed on the laminated surface, and the bending strength was also lower than that expected by the "bulk specific gravity square law" compared to Example 1. .
比較例２
実施例２と同一条件にて厚さ３．２＋＊ｍで、含水率３
９％の生板を得た。この生板を２枚積層し、４５ ｋｙ
／ ０ｍ２で加圧成形して含水率を７％低下させ、厚さ
５．８１で、含水率３２％の波板を作成した。これを２
週間自然養生し、ノンアスベスト波板を得た。Comparative Example 2 Under the same conditions as Example 2, the thickness was 3.2+*m and the moisture content was 3.
A green board of 9% was obtained. Laminate two of these raw boards and make 45 ky.
/ 0 m2 to reduce the moisture content by 7% to create a corrugated sheet with a thickness of 5.81 mm and a moisture content of 32%. This 2
After natural curing for a week, a non-asbestos corrugated sheet was obtained.
得られたノンアスベスト波板の嵩比重は１．５２であり
、曲げ破壊荷重も４１０ｋＦ！で、積層面に部分的な剥
離現象が認められ、曲げ破壊荷重も実施例２と比較して
嵩比重の低下で予想される以上の低下を示した。The bulk specific gravity of the obtained non-asbestos corrugated sheet is 1.52, and the bending breaking load is also 410kF! A partial peeling phenomenon was observed on the laminated surface, and the bending failure load also showed a decrease more than expected due to the decrease in bulk specific gravity compared to Example 2.
［発明の効果］
本発明方法によりノンアスベストスレート積層板を剥離
現象を生じさせることなく、効率的に製造することがで
きる。[Effects of the Invention] By the method of the present invention, a non-asbestos slate laminate can be efficiently manufactured without causing any peeling phenomenon.
Claims (1)
を湿式混合し、抄造法により形成した生板を複数枚積層
した後、プレス成形を行い、養生硬化することからなる
ノンアスベストスレートの製造方法において、プレス成
形前の生板含水率を３３％以上とし且つプレス成形によ
る生板含水率の低下量を１０％以上とすることを特徴と
するノンアスベストスレートの製造方法。A method for manufacturing non-asbestos slate, which consists of wet mixing fibrous raw materials other than asbestos and powder raw materials for matrix formation, laminating a plurality of raw boards formed by a papermaking method, press forming, and curing and hardening. A method for producing non-asbestos slate, characterized in that the moisture content of the green board before press forming is 33% or more, and the amount of decrease in the water content of the green board by press forming is 10% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025998A JPH0825182B2 (en) | 1990-02-07 | 1990-02-07 | Manufacturing method of non-asbestos slate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025998A JPH0825182B2 (en) | 1990-02-07 | 1990-02-07 | Manufacturing method of non-asbestos slate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03231803A true JPH03231803A (en) | 1991-10-15 |
| JPH0825182B2 JPH0825182B2 (en) | 1996-03-13 |
Family
ID=12181391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2025998A Expired - Lifetime JPH0825182B2 (en) | 1990-02-07 | 1990-02-07 | Manufacturing method of non-asbestos slate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0825182B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5247022A (en) * | 1975-10-13 | 1977-04-14 | Kubota Ltd | Method of production of fiberrmixed cement board |
-
1990
- 1990-02-07 JP JP2025998A patent/JPH0825182B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5247022A (en) * | 1975-10-13 | 1977-04-14 | Kubota Ltd | Method of production of fiberrmixed cement board |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0825182B2 (en) | 1996-03-13 |
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