JPS63256555A - Extrusion formation of inorganic products - Google Patents
Extrusion formation of inorganic productsInfo
- Publication number
- JPS63256555A JPS63256555A JP9372387A JP9372387A JPS63256555A JP S63256555 A JPS63256555 A JP S63256555A JP 9372387 A JP9372387 A JP 9372387A JP 9372387 A JP9372387 A JP 9372387A JP S63256555 A JPS63256555 A JP S63256555A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- mixed
- pulp fibers
- softwood
- extrusion molding
- 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
- 238000001125 extrusion Methods 0.000 title claims description 15
- 230000015572 biosynthetic process Effects 0.000 title 1
- 239000000835 fiber Substances 0.000 claims description 43
- 239000011122 softwood Substances 0.000 claims description 12
- 239000011121 hardwood Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000012783 reinforcing fiber Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 description 9
- 229910052895 riebeckite Inorganic materials 0.000 description 9
- 230000014759 maintenance of location Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000027866 inflammatory disease Diseases 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (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) [Summary] 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〕
この考案は無機質製品の押出成形方法に関し、詳しくは
無石綿配合のセメントスラリーによる無機質製品の押出
成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a method for extrusion molding of inorganic products, and more particularly to a method for extrusion molding of inorganic products using asbestos-free cement slurry.
従来、セメントを主成物とした無機質製品の補強繊維と
して大量の石綿が使用されてきた。Conventionally, large amounts of asbestos have been used as reinforcing fibers for inorganic products made mainly of cement.
しかし石綿は公害の原因となること、及び資源枯渇等の
理由より使用の廃絶の要請が高く、石綿に代えガラス繊
維、あるいはパルプ繊維、合成繊維の使用が種ケ試みら
れているところである。However, there is a strong demand for the abolition of the use of asbestos due to the fact that it causes pollution and the depletion of resources, and attempts are currently being made to use glass fiber, pulp fiber, or synthetic fiber instead of asbestos.
〔従来技術の問題点〕 ・
しかしながら、石綿は製品強度の付与のみならず未硬化
状態の成形品の保型性付与にも効果が有り、特に押出成
形法では押出成形中における材料の流動性、中空の押出
成形品の保型性等について大きな効果が有り、押出成形
法において無石綿化を図るのは非常に困難である問題が
有った。[Problems with the prior art] - However, asbestos is effective not only in imparting strength to the product but also in imparting shape retention to uncured molded products. In particular, in extrusion molding, asbestos is effective in imparting shape retention properties to the material during extrusion molding. It has a great effect on the shape retention of hollow extrusion molded products, and there is a problem in that it is extremely difficult to achieve asbestos-free extrusion molding.
例えば、押出成形される混線材料中に石綿に代えガラス
繊維を使用した場合、混練押出時のスクリューの回転に
よりガラス繊維の損傷、切断が避けられず耐アルカリ性
が非常に劣化し、繊維添加の効果がかなり低下されざる
を得す、また生産性を高めるために必須とされるオート
クレーブ養生時の耐熱、耐久性の低下も著しいと言った
問題が有る。For example, if glass fiber is used instead of asbestos in the mixed wire material to be extruded, the rotation of the screw during kneading and extrusion will inevitably damage and cut the glass fibers, resulting in a very poor alkali resistance. There is also the problem that the heat resistance and durability during autoclave curing, which are essential for increasing productivity, are significantly reduced.
また、パルプを補強繊維として用いる場合、短い繊維を
使用した場合、充分な製品強度となし得す、あまり多量
に配合すると出来上った製品の耐火性がなくなる問題が
有る。In addition, when pulp is used as a reinforcing fiber, if short fibers are used, sufficient strength of the product cannot be achieved, but if too large a quantity is added, the resulting product may lose its fire resistance.
また長繊維のものを使用すると製品表面の平滑性が損な
われると言った問題が有る。Furthermore, when long fibers are used, there is a problem in that the smoothness of the product surface is impaired.
この発明は上記問題点に鑑み、完全に無石綿配合とされ
ているにもかかわらず、充分な成形品保型性及び製品強
度を付与出来る無機質製品の押出成形方法を提供するこ
とを目的としてなされたものである。In view of the above problems, the present invention was made for the purpose of providing an extrusion molding method for inorganic products that can impart sufficient molded product shape retention and product strength despite being completely asbestos-free. It is something that
即ち、この発明の無機質製品の押出成形方法は補強繊維
として、針葉樹及び広葉樹のパルプ繊維を用い、繊維長
分布が４８メツシュ以上が７０％以上を占める針葉樹パ
ルプ繊維と、同分布が１４メツシュ以下のものが８０％
以上を占める広葉樹パルプ繊維を均一に乾燥状態で混合
し、次いで該混合繊維とセメント、骨材及び必要量の水
とを均一に混合し、該混合原料を常法により押出成形す
ることを特徴とするものである。That is, the extrusion molding method for inorganic products of the present invention uses softwood and hardwood pulp fibers as reinforcing fibers, with softwood pulp fibers having a fiber length distribution of 48 mesh or more accounting for 70% or more, and softwood pulp fibers having a fiber length distribution of 48 mesh or more accounting for 70% or more, and softwood pulp fibers having a fiber length distribution of 14 mesh or less. 80% of things
The hardwood pulp fibers that account for the above are mixed uniformly in a dry state, then the mixed fibers are uniformly mixed with cement, aggregate, and a required amount of water, and the mixed raw material is extruded by a conventional method. It is something to do.
この発明において、補強繊維として使用される針葉樹と
広葉樹のパルプは、前者は第１図のグラフ（イ）に示す
ように粉砕機を用いて開繊した場合の繊維長分布が繊維
長の長いものが多く、後者は（ロ）、（ハ）に示すよう
に繊維長の短いものが多い。In this invention, the softwood and hardwood pulps used as reinforcing fibers are those whose fiber length distribution is long when opened using a pulverizer, as shown in graph (a) in Figure 1. The latter often have short fiber lengths, as shown in (b) and (c).
従って両者の長所を同時に発揮させ針葉樹のパルプ繊維
によって成形品の曲げ強度を得、広葉樹のパルプ繊維に
よって成形品の平滑性向上を図るものである。Therefore, by simultaneously exhibiting the advantages of both, the bending strength of the molded product is obtained by using softwood pulp fibers, and the smoothness of the molded product is improved by using hardwood pulp fibers.
また、針葉樹パルプ繊維において４８メソシュ以上の大
きさのものが７０％以上を占めるものを用いるのは、充
分な繊維長のものを確保するためであり、広葉樹パルプ
繊維として１４メソシユ以下の大きさのものが８０％以
上を占めるものを用いるのは充分短繊維のものを確保す
るためである。In addition, the reason why we use softwood pulp fibers in which 70% or more of them are 48 mesos or more in size is to ensure sufficient fiber length, and hardwood pulp fibers with a size of 14 mesos or less The purpose of using a fiber containing 80% or more of fibers is to ensure that the fibers are sufficiently short.
そして、これらパルプ繊維を乾式混合し、長繊維と短繊
維とを均一に混合する。Then, these pulp fibers are dry mixed to uniformly mix long fibers and short fibers.
上記混合繊維をセメント、骨材及び必要量の水と混練し
、押出成形すれば、長繊維により押出成形直後の保型性
並びに硬化後の製品強度が確保され、また短繊維によっ
て製品表面平滑性が高められ、石綿添加にほぼ四散する
効果が得られるのである。If the above mixed fibers are kneaded with cement, aggregate, and the required amount of water and extruded, the long fibers will ensure shape retention immediately after extrusion and product strength after curing, and the short fibers will ensure product surface smoothness. As a result, the effect of adding asbestos is almost completely eliminated.
次に、この発明の詳細な説明する。 Next, the present invention will be explained in detail.
パルプの繊維長分布について４８メツシュ以上が７０％
以上とされた針葉樹パルプと同１４メツシュ以下が８０
％以上とされた広葉樹パルプの各々のパルプ繊維をシー
ト状態で粉砕機にかけ、乾式開繊し、次いで両者を１：
１の重量比で混合した。Regarding pulp fiber length distribution, 48 mesh or more is 70%.
Coniferous pulp with a mesh size of 14 or less is 80
% or more of the hardwood pulp was passed through a pulverizer in the form of a sheet, dry-opened, and then the two were mixed in a ratio of 1:
They were mixed at a weight ratio of 1:1.
これを表１に示す配合としてセメントスラリーを調整し
、押出成形機により、中２５０ｍｍ 、長さ４００ｍｍ
、厚さ１０ｍｍの無ａ質板を得、３日間自然養生後オ
ートクレーブにより８ｋｇノＣｌ１１２×８時間の条件
で養生を行なった。A cement slurry was prepared using the composition shown in Table 1, and an extrusion molding machine was used to form a cement slurry with a diameter of 250 mm and a length of 400 mm.
An aluminous board with a thickness of 10 mm was obtained, and after natural curing for 3 days, it was cured in an autoclave under the conditions of 8 kg of Cl112 x 8 hours.
なお、同時に従来例と同様の石綿配合及び無石綿の比較
例として、針葉樹か広葉樹か、いずれか一方のみのパル
プ繊維を用いたスラリーにより上記と同様に無機質板を
成形、硬化させた。At the same time, as a comparative example with the same asbestos composition and asbestos-free composition as in the conventional example, an inorganic board was molded and cured in the same manner as above using a slurry using only pulp fibers of either softwood or hardwood.
上記実施例、従来例比較例（１）、 （２）につき、
曲げ強度（スパン４００ｍｍ一点曲げ）、たわみ性、釘
打性、比重及び成形性につき試験したところ、表１下欄
の結果が得られた。Regarding the above embodiments and conventional comparative examples (1) and (2),
When the bending strength (span 400 mm single point bending), flexibility, nailing property, specific gravity and formability were tested, the results shown in the lower column of Table 1 were obtained.
なお、表１の試験結果中、釘打性は無機質板の隅角部の
３０ｍｍ Ｘ ３０ｍｍの位置に２．３ φｍｍの釘を
打った時の破損性により判定し、×は割れの発生Δは微
細クラック発生◎は異常なしを示す。In addition, in the test results in Table 1, nailing performance is determined by the breakage when a 2.3 φmm nail is driven into a 30 mm x 30 mm corner of the inorganic board, and × indicates the occurrence of cracking Δ. Fine cracks occurred ◎ indicates no abnormality.
また、成形性は表面平滑度を示し、×は露出繊維による
ザラ付きの著しいもの、Ｏは露出繊維は有るがそれほど
目立たないもの、◎はきわめて平滑なものを示す。Furthermore, moldability indicates surface smoothness; × indicates that there is significant roughness due to exposed fibers, O indicates that exposed fibers are present but not so noticeable, and ◎ indicates that the surface is extremely smooth.
表１
注）バルブＡは針葉樹バルブ繊維を、パルプＢは広葉樹
バルブ繊維を示す。Table 1 Note: Valve A indicates softwood bulb fiber, and Pulp B indicates hardwood bulb fiber.
この発明は以上説明したようにパルプ繊維の長短両者の
特質を利用し、これらを合理的に組合わせることによっ
て、強度、釘打性及び表面平滑性など建材として有用な
特性を有するものを、無石綿配合にて簡単に成形可能と
なったのである。As explained above, this invention utilizes both the long and short characteristics of pulp fibers and rationally combines them to create a material that has properties useful as a building material such as strength, nailing ability, and surface smoothness. The combination of asbestos made it easy to mold.
第１図はこの発明の方法に使用されるパルプの構成繊維
の繊維分布率を示すグラフである。
７／［］
国中、数キ濾メッレエ炎うｔす。
士１オ、篩よｈへ′るｊ−’；）、−＋を篩を通直れも
）１示す。
手続補正書（自発）
昭和６３年 ３月２３日
昭和６２年特許願第０９３７２３号
２、発明の名称
無機質製品の押出成形方法
３、補正をする者
事件との関係 特許出願人
住所 大阪市浪速区敷津東−丁目２番４７号名称 （１
０５）久保田鉄工株式会社
代表者 代表取締役社長 三野重和
４、代理人 〒６６２
住所 兵庫県西宮市門戸荘１５番１１号６、補正の内容
（１） 明細書第１頁１６行目に「この考案は」とあ
るのを「この発明は」と補正します。FIG. 1 is a graph showing the fiber distribution ratio of the constituent fibers of the pulp used in the method of the present invention. 7/[] There were several outbreaks of inflammatory disease throughout the country. 1o, pass through the sieve 'j-';), -+ through the sieve)1 show. Procedural amendment (spontaneous) March 23, 1988 Patent Application No. 093723 of 1988 2, Name of the invention Extrusion molding method for inorganic products 3, Relationship with the case of the person making the amendment Patent applicant address Naniwa-ku, Osaka City Shikizu Higashi-chome 2-47 Name (1
05) Kubota Tekko Co., Ltd. Representative Director and President Shigekazu Mino 4, Agent 662 Address 15-11-6 Mondosho, Nishinomiya City, Hyogo Prefecture Contents of the amendment (1) On page 1, line 16 of the specification, “This "This invention is" should be amended to "This invention is".
Claims (1)
を用い、パルプ繊維の繊維長分布が４８メッシュ以上が
７０％以上を占める針葉樹パルプ繊維と、同分布が１４
メッシュ以下のものが８０％以上を占める広葉樹パルプ
繊維を均一に乾燥状態で混合し、次いで該混合繊維とセ
メント、骨材及び必要量の水とを均一に混合し、該混合
原料を常法により押出成形することを特徴とする無機質
製品の押出成形方法。(1) As reinforcing fibers, softwood and hardwood pulp fibers are used, with softwood pulp fibers having a fiber length distribution of 48 mesh or more accounting for 70% or more, and softwood pulp fibers having the same distribution of 14 mesh or more.
Hardwood pulp fibers of which 80% or more are below mesh are mixed uniformly in a dry state, then the mixed fibers are uniformly mixed with cement, aggregate, and the required amount of water, and the mixed raw material is processed by a conventional method. An extrusion molding method for inorganic products characterized by extrusion molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9372387A JPH0672039B2 (en) | 1987-04-15 | 1987-04-15 | Extrusion molding method for inorganic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9372387A JPH0672039B2 (en) | 1987-04-15 | 1987-04-15 | Extrusion molding method for inorganic products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63256555A true JPS63256555A (en) | 1988-10-24 |
| JPH0672039B2 JPH0672039B2 (en) | 1994-09-14 |
Family
ID=14090332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9372387A Expired - Fee Related JPH0672039B2 (en) | 1987-04-15 | 1987-04-15 | Extrusion molding method for inorganic products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672039B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02243548A (en) * | 1989-03-15 | 1990-09-27 | Asano Slate Co Ltd | Pulp fiber for extrusion molding and production of molded cement board using the same |
| JP2007045688A (en) * | 2005-08-12 | 2007-02-22 | Nozawa Corp | Composition for extruded cement |
-
1987
- 1987-04-15 JP JP9372387A patent/JPH0672039B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02243548A (en) * | 1989-03-15 | 1990-09-27 | Asano Slate Co Ltd | Pulp fiber for extrusion molding and production of molded cement board using the same |
| JP2007045688A (en) * | 2005-08-12 | 2007-02-22 | Nozawa Corp | Composition for extruded cement |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0672039B2 (en) | 1994-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |