JP3403541B2 - Gypsum particle board and manufacturing method thereof - Google Patents
Gypsum particle board and manufacturing method thereofInfo
- Publication number
- JP3403541B2 JP3403541B2 JP05288395A JP5288395A JP3403541B2 JP 3403541 B2 JP3403541 B2 JP 3403541B2 JP 05288395 A JP05288395 A JP 05288395A JP 5288395 A JP5288395 A JP 5288395A JP 3403541 B2 JP3403541 B2 JP 3403541B2
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- wood
- particle board
- layer
- pieces
- 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
- 229910052602 gypsum Inorganic materials 0.000 title claims description 61
- 239000010440 gypsum Substances 0.000 title claims description 61
- 239000002245 particle Substances 0.000 title claims description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002023 wood Substances 0.000 claims description 60
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 36
- 239000000843 powder Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000010410 layer Substances 0.000 claims description 21
- 239000002344 surface layer Substances 0.000 claims description 15
- 239000012792 core layer Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 239000011505 plaster Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 2
- 150000004683 dihydrates Chemical class 0.000 description 8
- 210000000569 greater omentum Anatomy 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 241000771208 Buchanania arborescens Species 0.000 description 1
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Finishing Walls (AREA)
- Panels For Use In Building Construction (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、床材、壁あるいは天井
などの内装材に好適な石膏パーティクルボードおよびそ
の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gypsum particle board suitable for an interior material such as a floor material, a wall or a ceiling, and a method for producing the gypsum particle board.
【０００２】[0002]
【従来の技術】一般に、尿素樹脂やフェノール樹脂、メ
ラミン樹脂などの接着剤を介して木片を板状に成形した
パーティクルボードや、セメントをバインダーとして木
片を板状に成形した木片セメント板が知られている。ま
た、天然繊維や化学繊維を補強材として１〜１０％程度
混入した石膏ボードも市販されている。2. Description of the Related Art Generally, a particle board formed by molding a wood piece into a plate shape with an adhesive such as a urea resin, a phenol resin, or a melamine resin, or a wood chip cement board formed by molding a wood piece into a plate shape using cement as a binder is known. ing. In addition, gypsum board containing 1 to 10% of natural fiber or chemical fiber as a reinforcing material is commercially available.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述し
たパーティクルボードは、比重が小さく、強度も高い
他、施工性に優れているものの、防火性や寸法安定性に
劣る欠点がある。また、木片セメント板や石膏ボード
は、防火性に優れているものの、比重が大きく、強度も
低い他、施工性が低い欠点がある。However, the above-mentioned particle board has small specific gravity and high strength and is excellent in workability, but has a drawback that it is inferior in fire resistance and dimensional stability. Further, although the wood chip cement board and the gypsum board are excellent in fireproofness, they have drawbacks that they have large specific gravity, low strength, and low workability.
【０００４】なお、石膏をバインダーとして木片を板状
に成形することも試みられているが、石膏と木片との密
着性が低く、他の競合製品に比べて強度および耐水性が
低いという問題がある。すなわち、石膏は、半水石膏に
結晶水となる水より多くの水を加えて二水石膏に変化さ
せることによって得られるが、通常半水石膏と水との混
合液は流動状であり、この混合液に木片を混合した場
合、団子状に固まる結果、両者の均一な混合は困難であ
る。特に端部の処理が極めて難しい。It has been attempted to form a wood piece into a plate shape using gypsum as a binder, but there is a problem that the adhesion between the gypsum and the wood piece is low and the strength and water resistance are lower than those of other competing products. is there. That is, gypsum is obtained by adding more water than water to be crystal water to hemihydrate gypsum to change it to dihydrate gypsum, but usually a mixed solution of hemihydrate gypsum and water is in a fluid state, When the wood chips are mixed with the mixed solution, they are hardened in a dumpling shape, so that it is difficult to uniformly mix them. In particular, it is extremely difficult to process the edges.
【０００５】本発明は、このような問題点に鑑みてなさ
れたもので、内装材として好適な石膏と木片との複合材
である石膏パーティクルボードを提供するとともに、こ
の石膏パーティクルボードをサイズに関係なく連続的に
製造することのできる石膏パーティクルボードの製造方
法を提供するものである。The present invention has been made in view of the above problems, and provides a gypsum particle board which is a composite material of gypsum and wood chips, which is suitable as an interior material, and relates to the size of the gypsum particle board. It is intended to provide a method for producing a gypsum particle board that can be continuously produced without using the method.
【０００６】[0006]
【課題を解決するための手段】本発明の石膏パーティク
ルボードは、表層に二水石膏からなる石膏層を有すると
ともに、芯層に表層に向かって大きな粉砕木片から小さ
な粉砕木片に順に傾斜する木片層を有し、前記石膏層に
サイジング剤または樹脂が混入されたことを特徴とする
ものである。The gypsum particle board of the present invention has a gypsum layer made of gypsum dihydrate on the surface layer, and a wood piece layer in which the crushed wood piece is inclined in order from the large crushed wood piece to the surface layer in the core layer. And a sizing agent or resin is mixed in the gypsum layer.
【０００７】また、本発明の石膏パーティクルボードの
製造方法は、粉砕された木片に水を添加して半水石膏粉
末を付着させた後、半水石膏粉末および半水石膏粉末が
付着された粉砕木片を分級することにより、表層に半水
石膏粉末を堆積させるとともに、芯層に表層に向かって
大きな粉砕木片から小さな粉砕木片を順に堆積させてマ
ットを形成し、次いで、マットを加圧し、硬化させるこ
とを特徴とするものである。Further, in the method for producing a gypsum particle board of the present invention, water is added to the crushed wood pieces to attach the hemihydrate gypsum powder, and then the hemihydrate gypsum powder and the hemihydrate gypsum powder are pulverized. By classifying the wood pieces, hemihydrate gypsum powder is deposited on the surface layer, and at the same time, from the large crushed wood pieces to the small crushed wood pieces are sequentially deposited on the core layer to form a mat, and then the mat is pressed and cured. It is characterized by that.
【０００８】[0008]
【作用】請求項１記載の石膏パーティクルボードにあっ
ては、表層に密度の高い石膏層を、芯層に軽くて剛性や
強度の大きい木片層をそれぞれ有し、しかも、石膏層に
サイジング剤や樹脂が混入されたことにより、木片セメ
ント板や石膏ボードに比べて比重が小さく、石膏層の、
水分浸入による強度劣化を抑制することができるため、
強度も大きい。また、パーティクルボードに比べて寸法
安定性が高く、防火性にも優れている。さらに、断熱性
および遮音性も良好であるとともに、現場での加工や施
工が容易であり、床材、内壁や天井といった内装材に好
適である。In the gypsum particle board according to claim 1, the surface layer has a high-density gypsum layer, the core layer has a light wood piece layer having high rigidity and strength, and the gypsum layer has a sizing agent and By mixing the resin, the specific gravity is smaller than the wood chip cement board or gypsum board,
Since it is possible to suppress the strength deterioration due to water infiltration,
Great strength. In addition, it has higher dimensional stability and better fire protection than particle boards. Further, it has good heat insulating properties and sound insulation properties, is easy to be processed and constructed on site, and is suitable for interior materials such as floor materials, inner walls and ceilings.
【０００９】[0009]
【００１０】また、請求項２記載の石膏パーティクルボ
ードの製造方法にあっては、粉砕された木片に水を添加
して半水石膏粉末を付着させた後、分級して加圧し、硬
化させることにより、内装材として好適な石膏パーティ
クルボードをサイズに関係なく連続的に、かつ、簡単に
製造することができる。Further, in the method for producing gypsum particle board according to claim 2, water is added to the crushed wood pieces to attach the hemihydrate gypsum powder, and then the particles are classified, pressurized and cured. Thus, a gypsum particle board suitable as an interior material can be continuously and easily manufactured regardless of its size.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１には、本発明の石膏パーティクルボー
ド１が示されている。この石膏パーティクルボード１
は、表層に二水石膏Ｇからなる石膏層２が形成されると
ともに、芯層に表層に向かって大きな粉砕木片Ｃから小
さな粉砕木片Ｃに順に傾斜する木片層３が形成されてい
る。FIG. 1 shows a gypsum particle board 1 of the present invention. This gypsum particle board 1
The gypsum layer 2 made of gypsum dihydrate G is formed on the surface layer, and the wood piece layer 3 is formed on the core layer in order from the large crushed wood piece C to the small crushed wood piece C toward the surface layer.
【００１３】この石膏パーティクルボード１は、表層に
密度の高い石膏層２が形成されていることにより、伸縮
が小さく寸法安定性に優れている他、防火性にも優れて
いる利点がある。すなわち、二水石膏に含まれる結晶水
が脱水するまでの間、温度は１００℃を越えることがな
く、類焼までに一定時間を確保することができる。ま
た、芯層に軽く、剛性の大きな木片層３が形成されてい
ることにより、比重が小さく、強度も高い他、釘の保持
力が高く、現場での加工や施工に優れるとともに、断熱
性や遮音性も良好である。この結果、内装材、例えば、
床材、壁、天井に好適となる。The gypsum particle board 1 has the advantage that it has small expansion and contraction, excellent dimensional stability, and fire resistance because the plaster layer 2 having a high density is formed on the surface layer. That is, the temperature does not exceed 100 ° C. until the water of crystallization contained in gypsum dihydrate is dehydrated, and a certain time can be secured before firing. Moreover, since the wood piece layer 3 that is light and has high rigidity is formed on the core layer, the specific gravity is low, the strength is high, the nail holding power is high, and the workability and construction at the site are excellent, and the heat insulating property is high. Good sound insulation. As a result, interior materials such as
Suitable for flooring, walls and ceilings.
【００１４】このような石膏パーティクルボード１を製
造するには、まず、木材、例えば、ラワンをチッパーで
厚さ０．５ｍｍ、長さ５０ｍｍ程度に切削し、次いで、
ハンマーミルで破砕する。さらに、一部大きな木片は、
パールマンミルで粉砕する。これらの粉砕された木片
は、乾燥工程を経ることなくその含水率が１００〜１３
０％となるように水を添加して調整する。その後、粉砕
木片に半水石膏粉末を付着させ、分級する。すなわち、
図２に示すように、半水石膏粉末ｇが付着された粉砕木
片Ｃg と、半水石膏粉末ｇとの混合物をホッパー１１か
らコール板１２上に落下させ、その際、吹き出し装置１
３から前後方向（図２の左右方向）にエアを噴出させる
と、水を含み、半水石膏粉末ｇが付着された大きな粉砕
木片Ｃg はエアの影響を受けることなくそのまま落下
し、一方、水を含み、半水石膏粉末ｇが付着された小さ
な粉砕木片Ｃg がその遠方に吹き飛ばされ、さらに遠方
に半水石膏粉末が吹き飛ばされることになる。In order to manufacture such a gypsum particle board 1, first, wood, for example, lauan is cut with a chipper to a thickness of about 0.5 mm and a length of about 50 mm, and then,
Crush with a hammer mill. In addition, some large pieces of wood
Grind with a Pearlman mill. These crushed wood pieces have a water content of 100 to 13 without undergoing a drying process.
Adjust by adding water to 0%. Then, hemihydrate gypsum powder is attached to the crushed wood pieces and classified. That is,
As shown in FIG. 2, a mixture of ground wood pieces C g to which hemihydrate gypsum powder g is attached and hemihydrate gypsum powder g is dropped from the hopper 11 onto the caul plate 12, and at that time, the blowing device 1
When air is ejected from 3 in the front-rear direction (left-right direction in FIG. 2), a large crushed wood piece C g containing water and having hemihydrate gypsum powder g attached falls without being affected by the air, while The small crushed wood pieces C g containing water and having the hemihydrate gypsum powder g attached thereto are blown away, and the hemihydrate gypsum powder is further blown away.
【００１５】ここで、コール板１２を前方（図２の矢符
方向）に移動させると、コール板１２の移動方向に対し
て後方では、半水石膏粉末ｇが堆積され、その前方に向
かうにしたがって半水石膏粉末ｇが付着された粉砕木片
Ｃg のうち、小さな木片Ｃgから順に大きな木片Ｃg が
堆積されることになる。そして、吹き出し装置１３を越
えると、前述とは逆に、大きな木片Ｃg 、小さな木片Ｃ
g 、半水石膏粉末ｇの順に堆積されることになる。この
結果、表層に半水石膏粉末ｇが堆積され、芯層に表層に
向かうにしたがって大きな木片Ｃg から小さな木片Ｃg
の順に連続的に堆積されてマット１Ａがコール板１２上
に形成されるものである。When the caul plate 12 is moved forward (in the direction of the arrow in FIG. 2), hemihydrate gypsum powder g is deposited behind the caul plate 12 in the moving direction and moves toward the front. Therefore, among the crushed wood pieces C g to which the hemihydrate gypsum powder g is attached, the large wood pieces C g are deposited in order from the small wood piece C g . Then, when passing over the blowing device 13, contrary to the above, a large piece of wood C g and a small piece of wood C
g and hemihydrate gypsum powder g are deposited in this order. As a result, the surface layer hemi gypsum powder g is deposited in a small wood C g from a large piece of wood C g toward the surface layer to the core layer
The mat 1A is continuously deposited in this order to form the mat 1A on the caul plate 12.
【００１６】次いで、このマット１Ａをホットプレス
（図示せず）を介して温度４０〜６０℃、１〜５ｋｇｆ
／ｃｍ2 で約１０〜３０分間加熱加圧する。この間、半
水石膏粉末ｇが粉砕木片Ｃg に含有された水分を取り込
んで二水石膏Ｇに変化し、石膏パーティクルボード１が
製造されることになる。Next, this mat 1A is heated at a temperature of 40 to 60 ° C. and a pressure of 1 to 5 kgf through a hot press (not shown).
/ Cm heated pressurized 2 in about 10 to 30 minutes. During this period, the hemihydrate gypsum powder g takes in the water contained in the ground wood pieces C g and changes into dihydrate gypsum G, and the gypsum particle board 1 is manufactured.
【００１７】この結果、防火性、寸法安定性、施工性に
優れ、軽くて強度の高い特性を有する石膏パーティクル
ボード１を、サイズに関係なく連続的に、かつ、簡単に
製造することができる。As a result, the gypsum particle board 1 which is excellent in fireproofness, dimensional stability, workability, and is light and has high strength can be continuously and easily manufactured regardless of its size.
【００１８】この場合、半水石膏から二水石膏への変化
は、常温でも進行することから、必ずしも加熱する必要
はない。ただし、温度によって硬化時間が異なることか
ら、硬化時間を一定とするためには、その硬化時間に対
応した設定温度に加熱する必要がある。In this case, since the change from hemihydrate gypsum to dihydrate gypsum proceeds even at room temperature, it is not always necessary to heat. However, since the curing time varies depending on the temperature, in order to make the curing time constant, it is necessary to heat to the set temperature corresponding to the curing time.
【００１９】なお、石膏層２に、サイジング剤や樹脂を
混入させると、石膏Ｇの結晶境界に前述したサイジング
剤や樹脂が立体的な網目状に拡散することになり、石膏
層２の、水分浸入による強度劣化を抑制し、さらに強度
を向上させることができる。具体的には、木片に水を添
加する際、その添加水に半水石膏粉末ｇの０．１〜４％
に相当するサイジング剤、例えば、パラフィンエマルジ
ョンを加えたり、半水石膏粉末ｇの０．５〜１０％に相
当する水溶性のＥＶＡ（エチレン・酢酸ビニル共重合
体）、ＰＡＥ（ポリアクリル酸エステル）やＳＢＲ（ス
チレン・ブタジェンゴム）を加えることにより、コスト
アップを低く抑えながら強度を高めることができる。こ
の場合、パラフィンエマルジョンは、粒子がより小さな
ものが分散性が良好であり、少ない添加量で強度低下を
抑制することができる他、樹脂は耐水性の観点からＳＢ
Ｒが好ましい。When a sizing agent or resin is mixed in the gypsum layer 2, the sizing agent or resin described above diffuses into the crystal boundaries of the gypsum G in a three-dimensional network, and the water content of the gypsum layer 2 is reduced. It is possible to suppress the strength deterioration due to infiltration and further improve the strength. Specifically, when water is added to a piece of wood, 0.1 to 4% of hemihydrate gypsum powder g is added to the added water.
Sizing agent such as paraffin emulsion, water-soluble EVA (ethylene-vinyl acetate copolymer) equivalent to 0.5 to 10% of hemihydrate gypsum powder, PAE (polyacrylic acid ester) By adding or SBR (styrene / butadiene rubber), it is possible to increase the strength while suppressing the cost increase. In this case, the paraffin emulsion having smaller particles has better dispersibility, and the strength reduction can be suppressed with a small addition amount.
R is preferred.
【００２０】ところで、前述した実施例においては、半
水石膏粉末ｇと、この半水石膏粉末ｇが付着された粉砕
木片Ｃg との分級を風力を利用して行ったが、重力選別
を用いることもできる。例えば、図３に示すように、ホ
ッパー１１からの半水石膏粉末ｇおよび半水石膏粉末ｇ
が付着された粉砕木片Ｃg とを案内板１４を介して傾斜
板１５に落下させ、その反発力の相違を利用してマット
１Ａを形成することもできる。すなわち、傾斜板１５に
落下した粉砕木片Ｃg は、跳ね上がって遠くに落下する
一方、半水石膏粉末ｇは、傾斜板１５に沿って滑落し、
その下端縁直下に落下する。このため、コール板１２を
移動させることにより、コール板１２の移動方向に対し
て後方に位置する傾斜板１５の下端直下位置では、半水
石膏粉末ｇが堆積し、以下コール板１２の移動に連れて
先に堆積した半水石膏粉末ｇの上に小さな木片Ｃg 、大
きな木片Ｃg の順に堆積する。さらに、他方の傾斜板１
５を越えると、前述とは逆に、大きな木片Ｃg 、小さい
木片Ｃg および半水石膏粉末ｇの順に堆積されることに
なる。By the way, in the above-mentioned embodiments, the hemihydrate gypsum powder g and the ground wood chips C g to which the hemihydrate gypsum powder g is attached are classified by using wind power, but gravity sorting is used. You can also For example, as shown in FIG. 3, hemihydrate gypsum powder g and hemihydrate gypsum powder g from the hopper 11
It is also possible to form the mat 1A by dropping the crushed wood chips C g to which is attached to the inclined plate 15 via the guide plate 14 and utilizing the difference in the repulsive force. That is, the ground wood pieces C g that have fallen on the inclined plate 15 bounce up and fall far away, while the hemihydrate gypsum powder g slides down along the inclined plate 15,
It falls just below the bottom edge. Therefore, by moving the caul plate 12, hemihydrate gypsum powder g is deposited at a position just below the lower end of the inclined plate 15 which is located rearward with respect to the moving direction of the caul plate 12, and the caul plate 12 is moved in the following. A small piece of wood C g and a large piece of wood C g are deposited in this order on the hemihydrate gypsum powder g that was previously deposited. Further, the other inclined plate 1
When it exceeds 5, contrary to the above, large pieces of wood C g , small pieces of wood C g and hemihydrate gypsum powder g are deposited in this order.
【００２１】この場合においても、コール板１２上に、
表層に半水石膏粉末ｇが堆積され、芯層に表層に向かう
にしたがって大きな粉砕木片Ｃg から小さな粉砕木片Ｃ
g の順に堆積されてマット１Ａが形成されることにな
る。以下、前述したように、マット１Ａを加熱加圧する
ことで石膏パーティクルボード１を製造することができ
る。Also in this case, on the caul plate 12,
Hemihydrate gypsum powder g is deposited on the surface layer, and from the large crushed wood piece C g to the small crushed wood piece C on the core layer toward the surface layer.
The mat 1A is formed by being deposited in the order of g . Hereinafter, as described above, the gypsum particle board 1 can be manufactured by heating and pressing the mat 1A.
【００２２】この他、篩分による分級を利用してもよ
く、また、これらを併用することもできる。In addition to this, classification by sieving may be used, or these may be used in combination.
【００２３】[0023]
【発明の効果】以上のように、請求項１記載の石膏パー
ティクルボードにおいては、表層に二水石膏からなる石
膏層を有するとともに、芯層に表層に向かって大きな粉
砕木片から小さな粉砕木片に順に傾斜する木片層を有
し、石膏層にサイジング剤または樹脂が混入されたこと
から、木片セメント板や石膏ボードに比べて比重が小さ
く、石膏層の、水分浸入による強度劣化を抑制すること
ができるため、強度も大きい。また、パーティクルボー
ドに比べて寸法安定性が高く、防火性にも優れている。
さらに、断熱性および遮音性も良好であるとともに、現
場での加工や施工が容易となる。As described above, the gypsum particle board according to claim 1 has a gypsum layer made of gypsum dihydrate in the surface layer, and the core layer in order from the large crushed wood piece toward the surface layer to the small crushed wood piece. Since it has a sloping wood piece layer and a sizing agent or resin is mixed in the gypsum layer, it has a smaller specific gravity than wood piece cement boards and gypsum boards, and can suppress the strength deterioration of the gypsum layer due to water infiltration. Therefore, the strength is also large. In addition, it has higher dimensional stability and better fire protection than particle boards.
Further, the heat insulating property and the sound insulating property are good, and the processing and construction on the site become easy.
【００２４】また、請求項２記載の石膏パーティクルボ
ードの製造方法においては、粉砕された木片に水を添加
して半水石膏粉末を付着させた後、分級して加圧し、硬
化させることにより、石膏パーティクルボードをサイズ
に関係なく連続的に、かつ、簡単に製造することができ
る。Further, in the method for producing gypsum particle board according to claim 2, water is added to the crushed wood pieces to attach the hemihydrate gypsum powder, and then the particles are classified, pressurized and hardened. Gypsum particle board can be continuously and easily manufactured regardless of size.
【図１】本発明の石膏パーティクルボードの断面図であ
る。FIG. 1 is a cross-sectional view of a gypsum particle board of the present invention.
【図２】本発明の石膏パーティクルボードを製造する際
の分級工程を示す説明図である。FIG. 2 is an explanatory view showing a classification step when manufacturing the gypsum particle board of the present invention.
【図３】本発明の石膏パーティクルボードを製造する際
の他の分級工程を示す説明図である。FIG. 3 is an explanatory view showing another classification step when manufacturing the gypsum particle board of the present invention.
１ 石膏パーティクルボード １Ａ マット ２ 石膏層 ３ 木片層 Ｃ 粉砕木片 Ｃg 半水石膏粉末が付着された粉砕木片 Ｇ 石膏（二水石膏） ｇ 半水石膏粉末1 gypsum particle board 1A mat 2 gypsum layer 3 wood piece layer C ground wood piece C g hemihydrate gypsum powder to which hemihydrate gypsum powder is attached G gypsum (dihydrate gypsum) g hemihydrate gypsum powder
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｅ０４Ｆ 13/16 Ｅ０４Ｆ 13/16 Ａ (72)発明者 根津 修美雄 三重県四日市市住吉町15番２号 チヨダ ウーテ株式会社内 (56)参考文献 特開 平８−244161（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B32B 1/00 - 35/00 B28B 11/00 - 19/00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI E04F 13/16 E04F 13/16 A (72) Inventor Sumio Nezu 15-2 Sumiyoshi-cho, Yokkaichi-shi, Mie Chiyoda Ute Co., Ltd. (56) Reference literature JP-A-8-244161 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) B32B 1/00-35/00 B28B 11/00-19/00
Claims (3)
とともに、芯層に表層に向かって大きな粉砕木片から小
さな粉砕木片に順に傾斜する木片層を有し、前記石膏層
にサイジング剤または樹脂が混入されたことを特徴とす
る石膏パーティクルボード。With claim 1, having a gypsum layer made of gypsum on the surface layer, it has a piece of wood layers to be inclined in order from the large grinding pieces of wood into smaller crushed pieces of wood towards the surface to the core layer, the plaster layer
A gypsum particle board characterized by being mixed with a sizing agent or resin .
粉末を付着させた後、半水石膏粉末および半水石膏粉末
が付着された粉砕木片を分級することにより、表層に半
水石膏粉末を堆積させるとともに、芯層に表層に向かっ
て大きな粉砕木片から小さな粉砕木片を順に堆積させて
マットを形成し、次いで、マットを加圧し、硬化させる
ことを特徴とする石膏パーティクルボードの製造方法。2. Water is added to the crushed wood pieces to adhere the hemihydrate gypsum powder, and then the hemihydrate gypsum powder and the crushed wood pieces to which the hemihydrate gypsum powder is adhered are classified to obtain semi-water on the surface layer. Manufacture of gypsum particle board characterized by depositing gypsum powder and sequentially depositing large crushed wood pieces to small crushed wood pieces toward the surface of the core layer to form a mat, and then pressing and hardening the mat. Method.
混入されたことを特徴とする請求項２記載の石膏パーテ
ィクルボードの製造方法。3. The method for producing gypsum particle board according to claim 2, wherein a sizing agent or a resin is mixed in the added water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05288395A JP3403541B2 (en) | 1995-03-13 | 1995-03-13 | Gypsum particle board and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05288395A JP3403541B2 (en) | 1995-03-13 | 1995-03-13 | Gypsum particle board and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08244162A JPH08244162A (en) | 1996-09-24 |
| JP3403541B2 true JP3403541B2 (en) | 2003-05-06 |
Family
ID=12927286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05288395A Expired - Fee Related JP3403541B2 (en) | 1995-03-13 | 1995-03-13 | Gypsum particle board and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3403541B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881371B (en) * | 2019-04-15 | 2020-11-20 | 无锡科逸新材料有限公司 | Layered elastomer, manufacturing method thereof and special spinneret plate |
-
1995
- 1995-03-13 JP JP05288395A patent/JP3403541B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08244162A (en) | 1996-09-24 |
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