【０００１】[0001]
【発明の属する技術分野】本発明は、主として建物の外
装材として用いられる硬質木片セメント板に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard wood cement plate mainly used as a building exterior material.
【０００２】[0002]
【従来の技術】従来、木質材料とセメント類との複合成
形物である木片セメント板は、建物の外装材や内装材等
の建築材料として用いられている。このような木片セメ
ント板の製造方法としては、例えば、特公平５─１３０
９８号公報に記載されているように、木材チップを解繊
してなる木質繊維であって、大きさがバウエルマックネ
ット型篩分機による篩分布において４ｍｅｓｈ篩留分及
び２００ｍｅｓｈ篩通過分がおのおの１０重量％以下で
且つ４〜２８ｍｅｓｈの範囲の分が５５〜７５重量％の
木質繊維と、セメント及び適宜の水とからなる混合物を
型枠上に散布落下せしめて成形し、次いで加圧養生して
硬化させる乾式法による木質繊維セメント成形物の製造
方法が知られている。2. Description of the Related Art Conventionally, a wood chip cement board, which is a composite molded product of a wood material and cements, has been used as a building material such as an exterior material and an interior material of a building. As a method for manufacturing such a wood chip cement board, for example, Japanese Patent Publication No. 5-130
As described in Japanese Patent Publication No. 98-98, a wood fiber obtained by defibrating wood chips, the size of which is 4 mesh sieve fraction and 200 mesh sieve passage fraction in a sieve distribution by a Bauer-McNet type sieving machine. A mixture of 55% to 75% by weight of wood fiber, which is less than 5% by weight and in the range of 4 to 28 mesh, cement and appropriate water is sprayed and dropped on a mold, and then molded by pressure. A method for producing a wood fiber cement molded product by a dry method of curing is known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この方
法により得られた木質繊維セメント成形物は、その中に
含まれる木質繊維の大きさが４〜２８ｍｅｓｈの大きな
範囲の分が大半を占めるために、コンクリート中の空隙
を埋めることができず、建物の外装材の如く雨や雪等の
水分が直接接触するような硬質木片セメント板の用途に
使用した場合には、その接触表面からコンクリートの空
隙内に水分がしみ込んで、反りが発生し易いという問題
点がある。又、それを防止するために、後加工工程にお
いて、表面に防水性塗料等を塗布すると、工程が煩雑と
なり、生産性が上がらないのみならず、その塗膜が他の
部材との接触した際や長期間の使用により剥げ易く耐久
性が悪いという問題もあった。However, since the wood fiber cement molded product obtained by this method occupies most of the large range of wood fiber size of 4-28 mesh contained therein, When it is used for the application of hard wood chip cement board where the voids in the concrete cannot be filled and the moisture such as rain and snow is in direct contact like the exterior material of the building, from the contact surface to the inside of the voids of the concrete. There is a problem in that the water is soaked in and the warp easily occurs. Further, in order to prevent this, if a waterproof coating or the like is applied to the surface in the post-processing step, the process becomes complicated and productivity is not improved, and when the coating film comes into contact with other members. There is also a problem that it easily peels off after long-term use and has poor durability.
【０００４】本発明は、上記の如き従来の問題点を解消
し、耐透水性能が向上され、反り発生のおそれがない硬
質木片セメント板を提供することを目的としてなされた
ものである。The present invention has been made for the purpose of solving the above-mentioned conventional problems, and providing a hard wood chip cement plate which has improved water permeation resistance and is less likely to warp.
【０００５】[0005]
【課題を解決するための手段】本願の請求項１に記載の
発明（以下、本発明という）は、撥水剤を含有するセメ
ント組成物と、細分化された木片と、水とが混合された
混合物が所定形状に加圧成形されるとともに、加圧条件
下にて加熱硬化されている硬質木片セメント板である。The invention according to claim 1 of the present application (hereinafter referred to as the present invention) is a mixture of a cement composition containing a water repellent agent, fragmented wood chips, and water. It is a hard wood chip cement board in which the above mixture is pressure-molded into a predetermined shape and is heat-cured under pressure conditions.
【０００６】本願の請求項２に記載の発明（以下、本発
明２という）は、上記セメント組成物中の撥水剤の含有
量が、０．４〜２．０重量％である本発明に記載の硬質
木片セメント板である。The invention according to claim 2 of the present application (hereinafter referred to as the present invention 2) relates to the present invention in which the content of the water repellent agent in the cement composition is 0.4 to 2.0% by weight. It is the described hard wood chip cement board.
【０００７】本願の請求項３に記載の発明（以下、本発
明３という）は、上記撥水剤が金属石けんである本発明
又は本発明２に記載の硬質木片セメント板である。The invention according to claim 3 of the present application (hereinafter referred to as the present invention 3) is the hard wood chip cement board according to the present invention or the present invention 2 in which the water repellent is a metallic soap.
【０００８】本願の請求項４に記載の発明（以下、本発
明４という）は、上記セメント組成物が、アルミナセメ
ント、無水石膏又は（及び）半水石膏を主成分とする熱
硬化成分と、ポルトランドセメントと、撥水剤とを含有
するものからなる本発明、本発明２又は本発明３に記載
の硬質木片セメント板である。In the invention according to claim 4 of the present application (hereinafter referred to as the present invention 4), the cement composition comprises a thermosetting component containing alumina cement, anhydrous gypsum or / and hemihydrate gypsum as a main component, The hard wood chip cement board according to the present invention, the second invention or the third invention, which comprises Portland cement and a water repellent.
【０００９】本発明において、セメント組成物として
は、ポルトランドセメント、アルミナセメント、無水石
膏又は（及び）半水石膏を主成分とするセメント系成分
と、撥水剤とを含むものが使用されるが、本発明４の如
き、アルミナセメント、無水石膏又は（及び）半水石膏
を主成分とする熱硬化成分と、ポルトランドセメント
と、撥水剤とを含有するものが好適に使用される。In the present invention, as the cement composition, one containing a cement component containing Portland cement, alumina cement, anhydrous gypsum or / and hemihydrate gypsum as main components and a water repellent agent is used. As in the present invention 4, those containing a thermosetting component containing alumina cement, anhydrous gypsum or / and hemihydrate gypsum as main components, Portland cement, and a water repellent are preferably used.
【００１０】熱硬化成分としては、アルミナセメント、
無水石膏及び半水石膏から選ばれる成分が、単独又は２
種以上混合状態にて、主成分として使用される。As the thermosetting component, alumina cement,
A component selected from anhydrous gypsum and hemihydrate gypsum alone or 2
Used as a main component in a mixed state of more than one species.
【００１１】本発明において、セメント組成部中に含有
される撥水剤としては、公知のものが適宜使用される
が、例えば、カルシウムステアレートやアルミニウムス
テアレート等の金属石けんが挙げられる。セメント組成
物中の撥水剤の含有量は、本発明２の如く、０．４〜
２．０重量％であるのが好ましい。含有量が０．４重量
％未満であると、耐透水性能が十分でなく、２．０重量
％を超えると、内部剥離が生じ易い。In the present invention, as the water repellent contained in the cement composition part, known ones are appropriately used, and examples thereof include metallic soaps such as calcium stearate and aluminum stearate. The content of the water repellent agent in the cement composition is, as in the present invention 2, 0.4 to
It is preferably 2.0% by weight. If the content is less than 0.4% by weight, the water permeation resistance is not sufficient, and if it exceeds 2.0% by weight, internal peeling easily occurs.
【００１２】セメント組成物における、熱硬化成分に対
するポルトランドセメントとの混合割合は、重量比で
１：４〜４：１が好適である。この混合割合を外れ、セ
メント組成物中の熱硬化性成分の含有量が少なすぎ且つ
ポルトランドセメントの含有量が多すぎ場合には、木片
に対するセメント組成物の付着力が向上せず、得られる
木片入りセメント板の強度を上げにくくなり、逆に、熱
硬化性成分の含有量が多すぎ且つポルトランドセメント
の含有量が少なすぎる場合には、原料費が上がってしま
う。The mixing ratio of Portland cement to the thermosetting component in the cement composition is preferably 1: 4 to 4: 1 by weight. When the content of the thermosetting component in the cement composition is too small and the content of Portland cement is too large, the adhesive force of the cement composition to the wood piece is not improved, and the resulting wood piece is obtained. It becomes difficult to increase the strength of the cemented cement board, and conversely, when the content of the thermosetting component is too large and the content of Portland cement is too small, the raw material cost increases.
【００１３】本発明において、混合物中の木片として
は、家屋解体時に発生する建築廃木材から作製された木
チップや、その他の木チップを細分化された木片が使用
される。そのような木片としては、例えば、杉、檜、
松、栂、さわら、樫、なら、かば、ブナ、オーク、ラワ
ン、ひば、栗、けやき、椎、柳、竹等の材料からなるも
のが使用される。木片の形状は、用途や強度等の必要に
応じて適宜選択されるが、長さ６０ｍｍ以下、幅２０ｍ
ｍ以下、厚さ２ｍｍ以下のものが好ましく、目開き１．
６８ｍｍ以下の篩いで分級された通過分を７０重量％以
上含有するものが特に好ましい。In the present invention, as the wood chips in the mixture, wood chips produced from construction waste wood generated at the time of dismantling a house, or wood chips obtained by subdividing other wood chips are used. Examples of such wood chips include cedar, cypress,
Those made of materials such as pine, toga, straw, oak, nara, mackerel, beech, oak, lauan, hiba, chestnut, zelkova, shii, willow and bamboo are used. The shape of the piece of wood is appropriately selected depending on the use and strength of the piece, but the length is 60 mm or less and the width is 20 m.
It is preferable that the thickness is 2 m or less and the thickness is 2 mm or less.
Those containing 70% by weight or more of the passing amount classified by a sieve of 68 mm or less are particularly preferable.
【００１４】木片を作製する方法としては、公知の方法
を使用することができ、例えば、プレスや回転ロール等
による圧搾、スリッターや切断機等による切断等の方法
が挙げられる。木片には、必要に応じて微細木粉等が併
用されてもよい。As a method for producing the wood pieces, known methods can be used, and examples thereof include squeezing with a press or a rotating roll, cutting with a slitter or a cutting machine, and the like. If necessary, fine wood powder or the like may be used in combination with the wood chips.
【００１５】混合物としては、木片５〜３０重量部と、
セメント組成物７０〜９５重量部と、適宜量の水とを含
有するものが好適に使用される。木片の含有量が３０重
量部を超え且つセメント組成物の含有量が７０重量部よ
り少ないと、木片に付着するセメント組成物の量が少な
く、製品強度を上げることができず、木片の含有量が５
重量部より少なく且つセメント組成物の含有量が９５重
量部を超えると、木片を混入する利点が薄れ原料費が上
がってしまう。As a mixture, 5 to 30 parts by weight of wood chips,
A cement composition containing 70 to 95 parts by weight of a cement composition and an appropriate amount of water is preferably used. When the content of the wood chips exceeds 30 parts by weight and the content of the cement composition is less than 70 parts by weight, the amount of the cement composition adhered to the wood chips is small and the product strength cannot be increased, and the content of the wood chips is small. Is 5
If the amount of the cement composition is less than 95 parts by weight and the content of the cement composition exceeds 95 parts by weight, the advantage of mixing wood chips is diminished and the raw material cost is increased.
【００１６】本発明の硬質木片セメント板の製造方法と
しては、例えば、混合物を、型上に堆積させ、熱プレス
により、所定時間加圧加熱して硬化させた後、脱型する
ことにより得ることができる。The hard wood cement board of the present invention can be produced by, for example, depositing a mixture on a mold, heating and pressing the mixture for a predetermined time to cure it, and then removing the mold. You can
【００１７】[0017]
【作用】本発明の硬質木片セメント板は、撥水剤を含有
するセメント組成物と、細分化された木片と、水とが混
合された混合物が所定形状に加圧成形されるとともに、
加圧条件下にて加熱硬化されていることにより、水分が
直接接触するような用途に使用した場合に、水分がしみ
込みにくくなり、反り発生のおそれがない。The hard wood chip cement board of the present invention comprises a cement composition containing a water repellent agent, a wood chip that has been subdivided, and a mixture of water and pressure molded into a predetermined shape,
Since it is heat-cured under a pressurized condition, when it is used for the purpose of being in direct contact with water, it becomes difficult for water to soak in and there is no possibility of warpage.
【００１８】本発明２の硬質木片セメント板は、上記セ
メント組成物中の撥水剤の含有量が、０．４〜２．０重
量％であることにより、水分が直接接触するような用途
に使用した場合に、特に、水がしみ込みにくくなり、反
り発生のおそれがない。The hard wood chip cement board of the second aspect of the present invention has a water repellent content of 0.4 to 2.0% by weight in the cement composition, which makes it suitable for use in direct contact with water. When used, it is particularly difficult for water to soak in and there is no risk of warpage.
【００１９】本発明３の硬質木片セメント板は、撥水剤
が金属石けんであることにより、特に、水がしみ込みに
くくなり、反り発生のおそれがない。In the hard wood chip cement board of the third aspect of the present invention, since the water repellent is a metallic soap, it is particularly difficult for water to soak in and there is no risk of warpage.
【００２０】本発明４の硬質木片セメント板は、アルミ
ナセメント、無水石膏又は（及び）半水石膏を主成分と
する熱硬化成分と、ポルトランドセメントと、撥水剤と
を含有するものからなることにより、木片に対するセメ
ント組成物の付着量が向上するので、強度に優れてお
り、且つ原料費が安い。The hard wood chip cement board of the present invention 4 comprises a thermosetting component containing alumina cement, anhydrous gypsum or / and hemihydrate gypsum as main components, Portland cement and a water repellent. As a result, the amount of the cement composition attached to the wood chips is improved, so that the strength is excellent and the raw material cost is low.
【００２１】[0021]
【発明の実施の形態】実施例１〜４ 建築廃木材を水洗し、異物除去を行った後、リング型フ
レーカーやハンマーミルで切削して木チップからなる木
片を得た。BEST MODE FOR CARRYING OUT THE INVENTIONExamples 1 to 4 Building waste wood was washed with water to remove foreign substances, and then cut with a ring type flaker or a hammer mill to obtain wood chips made of wood chips.
【００２２】まず、木片２００重量部に、水５００重量
部を混合するとともに、セメント組成物２７７．５重量
部を混合して基材形成用混合物を得た。尚、セメント組
成物としては、ポルトランドセメント７１．２重量部、
アルミナセメント１４．４重量部、石膏８．６重量部、
石灰５．８重量部に、表１に示す含有量のカルシウムス
テアレートを含有するものを用いた。First, 500 parts by weight of water was mixed with 200 parts by weight of wood chips, and 277.5 parts by weight of a cement composition were mixed to obtain a mixture for forming a base material. As the cement composition, 71.2 parts by weight of Portland cement,
14.4 parts by weight of alumina cement, 8.6 parts by weight of gypsum,
The one containing 5.8 parts by weight of lime and the content of calcium stearate shown in Table 1 was used.
【００２３】混合物を、金属性の型上に堆積させ、圧力
３０ｋｇ／ｃｍ2、温度９３℃にて１２分間成形するこ
とにより加熱して硬化させた後、脱型して、厚み１４．
１ｍｍの硬質木片セメント板を得た。The mixture was deposited on a metal mold, heated and cured by molding at a pressure of 30 kg / cm2 and a temperature of 93 ° C. for 12 minutes, and then demolded to a thickness of 14.
A 1 mm hard wood chip cement board was obtained.
【００２４】比較例１ セメント組成物として撥水剤を含有しないものを用いた
こと以外は、実施例１〜４と同様にして、厚み１４．１
ｍｍの硬質木片セメント板を得た。Comparative Example 1 A thickness of 14.1 was obtained in the same manner as in Examples 1 to 4 except that a cement composition containing no water repellent was used.
A hard wood chip cement board of mm was obtained.
【００２５】比較例２ セメント組成物として、表１に示す含有量の撥水剤を含
むものを用いたこと以外は、実施例１〜４と同様にし
て、厚み１４．１ｍｍの硬質木片セメント板を得た。得
られた硬質木片セメント板は、板部内に剥離が生じてい
た。Comparative Example 2 A hard wood cement board having a thickness of 14.1 mm was prepared in the same manner as in Examples 1 to 4 except that the cement composition containing the water repellent having the content shown in Table 1 was used. Got The obtained hard wood chip cement board had peeling in the board part.
【００２６】実施例１〜４及び比較例１，２で得られた
硬質木片セメント板について、ＪＩＳ Ａ５４０３
６．５に準じて水位減少量を測定して、耐透水性能の評
価を行った。その結果を表１に示した。Regarding the hard wood chip cement boards obtained in Examples 1 to 4 and Comparative Examples 1 and 2, JIS A5403
The water level reduction was measured according to 6.5, and the water permeation resistance was evaluated. The results are shown in Table 1.
【００２７】[0027]
【表１】[Table 1]
【００２８】表１から明らかな如く、実施例１〜４の場
合には、いずれも、水位減少量が少ないのに対して、比
較例１の場合には、いずれも、水位減少量が大きく、
又、比較例２の場合には、水位減少量は少なかったが、
板部内に剥離が生じてしまう。As is clear from Table 1, in each of Examples 1 to 4, the water level reduction amount was small, while in Comparative Example 1, the water level reduction amount was large.
Also, in the case of Comparative Example 2, the amount of water level decrease was small,
Peeling occurs in the plate portion.
【００２９】[0029]
【発明の効果】本発明の硬質木片セメント板は、上記の
如き構成とされているので、耐透水性能に優れており、
反り発生のおそれがない。本発明２及び本発明３の硬質
木片セメント板は、それぞれ、上記の如き構成とされて
いるので、特に、耐透水性能に優れており、反り発生の
おそれがない。本発明４の硬質木片セメント板は、上記
の如き構成とされているので、強度に優れており、且つ
原料費が安い。EFFECTS OF THE INVENTION The hard wood chip cement board of the present invention is excellent in water permeation resistance because it is constructed as described above.
There is no risk of warpage. Since the hard wood chip cement plates of the second and third aspects of the invention are respectively configured as described above, they are particularly excellent in water permeation resistance and there is no risk of warpage. Since the hard wood cement board of the present invention 4 has the above-mentioned constitution, it has excellent strength and the raw material cost is low.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 18:26） 103:65─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl.6 Identification code Office reference number FI technical display location C04B 18:26) 103: 65
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3196596AJPH09227193A (en) | 1996-02-20 | 1996-02-20 | Hard wood-piece cement board |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3196596AJPH09227193A (en) | 1996-02-20 | 1996-02-20 | Hard wood-piece cement board |
| Publication Number | Publication Date |
|---|---|
| JPH09227193Atrue JPH09227193A (en) | 1997-09-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3196596APendingJPH09227193A (en) | 1996-02-20 | 1996-02-20 | Hard wood-piece cement board |
| Country | Link |
|---|---|
| JP (1) | JPH09227193A (en) |
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