JP3016492B2 - Fiberboard manufacturing method - Google Patents
Fiberboard manufacturing methodInfo
- Publication number
- JP3016492B2 JP3016492B2 JP3185345A JP18534591A JP3016492B2 JP 3016492 B2 JP3016492 B2 JP 3016492B2 JP 3185345 A JP3185345 A JP 3185345A JP 18534591 A JP18534591 A JP 18534591A JP 3016492 B2 JP3016492 B2 JP 3016492B2
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- JP
- Japan
- Prior art keywords
- pva
- powder
- fiberboard
- boric acid
- borate
- 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.)
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- Adhesives Or Adhesive Processes (AREA)
- Paper (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸音性，難燃性，耐湿
性の優れた天井材，壁材等の建築用板として用いられる
無機質繊維板及び防カビ性，耐湿性の優れた天井材，壁
材，畳床等の建築用板として用いられる有機質繊維板の
湿式法による製造方法に関する。BACKGROUND OF THE INVENTION This invention is, sound absorption, flame retardancy, humidity resistance superior ceiling material, inorganic fiber plate is used as a building plate wall materials, etc., and antifungal properties, moisture resistance superior ceiling The present invention relates to a method for producing an organic fiber board used as a building board such as a material, a wall material and a tatami floor by a wet method.
【０００２】[0002]
【従来の技術】従来、石綿，岩綿，鉱滓綿などを用いて
得られた無機質繊維板や木材チップ，パルプ，バガス，
古紙等を用いた有機質繊維板は、無機成分または有機成
分を水中に分散させた後、該分散液を金網スクリーン上
に流して水を切る方法（湿式法）により製造されてい
る。この場合、バインダーとしては、通常、でんぷん粉
末、ポリビニルアルコール（以下ＰＶＡと略称する）粉
末が用いられている。しかし、バインダーとしてでんぷ
んを用いた場合は、耐湿性，強度の劣化，カビの発生の
問題がある。一方、バインダーとしてＰＶＡを用いた場
合は、繊維板を抄造した後の乾燥工程に於てＰＶＡが溶
解し繊維板の表面へ移行する為、その特性が十分発現し
ないという問題がある。そこで湿式法における繊維板乾
燥時のＰＶＡの繊維板表面への移行を抑制する方法が各
種試みられている。この代表例としては、ＰＶＡ粉末と
硼酸又は硼酸塩の粉末とを併用して使用する方法がある
が、後者のみが先に水に溶解し抄造時に流出する為、多
量に使用しないと効果が現われ難しい（特開昭５０−２
７８０号，同５０−１５８６９号，同５０−５９４４７
号，同５１−２０２１５号，同５１−５３０７０号参
照）。2. Description of the Related Art Conventionally, inorganic fiberboard, wood chips, pulp, bagasse, and the like obtained using asbestos, rock wool, mineral wool, and the like.
An organic fiber board using waste paper or the like is manufactured by a method in which an inorganic component or an organic component is dispersed in water, and then the dispersion is flowed on a wire mesh screen to drain water (wet method). In this case, starch powder and polyvinyl alcohol (hereinafter abbreviated as PVA) powder are usually used as the binder. However, when starch is used as a binder, there are problems of moisture resistance, deterioration of strength, and generation of mold. On the other hand, when PVA is used as the binder, there is a problem that the properties are not sufficiently exhibited because PVA is dissolved and transferred to the surface of the fiberboard in a drying step after the fiberboard is made. Therefore, various methods have been attempted for suppressing the transfer of PVA to the fiberboard surface during fiberboard drying in the wet method. As a typical example, there is a method in which a PVA powder and a boric acid or borate powder are used in combination, but only the latter is dissolved in water first and flows out during papermaking. Difficult (Japanese Patent Laid-Open No. 50-2
No. 780, No. 50-15869, No. 50-59447
Nos., 51-20215 and 51-53070).
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、耐湿
性，防カビ性の優れた繊維板の製造において、従来問題
のあった湿式法における繊維板乾燥工程におけるＰＶＡ
の繊維板表面への移行を抑制することにより、上記問題
点の改善を行うことにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a fiberboard having excellent moisture resistance and fungicide resistance.
It is to improve the above-mentioned problem by suppressing the transfer to the fiberboard surface.
【０００４】[0004]
【課題を解決するための手段】本発明者は、上記課題を
解決するために鋭意検討した結果、硼酸水溶液または硼
酸塩水溶液を予め含浸させたＰＶＡ粉末をバインダーと
して用いることを特徴とする湿式法による繊維板の製造
方法を見出し、本発明を完成させるに到った。The present inventors SUMMARY OF THE INVENTION As a result of intensive studies to solve the above problems, a wet method which comprises using a PVA powder obtained by previously impregnating the aqueous boric acid solution or a borate solution as binder And found a method for producing a fiberboard by using the method of the present invention, and completed the present invention.
【０００５】本発明におけるＰＶＡとしては通常のＰＶ
Ａまたは各種変性ＰＶＡが使用しうるが、けん化度８５
モル％以上，重合度１３００以上のＰＶＡがより好まし
い。またＰＶＡ粉末の形状は粒状，繊維状のいずれでも
良いが、現在最も多く生産されている粒状のものが好ま
しい。ＰＶＡの粒径としては１０メッシュパス〜３００
メッシュオンの範囲が好ましい。ＰＶＡの粒径が上記範
囲より大きすぎるとＰＶＡ溶解後のバインダー分布にか
たよりが生じるので、効果が不十分となることがあり、
一方ＰＶＡの粒径が上記範囲より小さすぎると抄造時の
ＰＶＡの歩留が悪くバインダー効果が発現しなくなるこ
とがある。ＰＶＡの使用量は繊維板に対して１〜１０重
量％が好ましい。ＰＶＡの使用量が１重量％未満では強
度が不十分であり、１０重量％を超えるとバインダー性
能が過大となることから必ずしも好ましくない。[0005] As PVA in the present invention, ordinary PVA is used.
A or various modified PVAs may be used, but with a saponification degree of 85
More preferably, PVA is at least mol% and the degree of polymerization is at least 1300. Further, the shape of the PVA powder may be either granular or fibrous, but the granular one which is currently most frequently produced is preferable. PVA particle size is 10 mesh pass to 300
A mesh-on range is preferred. If the particle size of the PVA is too large, the binder distribution after the PVA is melted may be ineffective, and the effect may be insufficient.
On the other hand, if the particle size of PVA is too small, the yield of PVA during papermaking may be poor and the binder effect may not be exhibited. The amount of PVA used is preferably 1 to 10% by weight based on the fiberboard. If the amount of PVA is less than 1% by weight, the strength is insufficient, and if it exceeds 10% by weight, the binder performance becomes excessively large, which is not always preferable.
【０００６】次に本発明における硼酸水溶液または硼酸
塩水溶液の溶質である硼酸または硼酸塩としては水に溶
解可能なものであれば特に制限はないが、高濃度に溶解
するものがより好ましい。即ち硼酸あるいは硼酸のアン
モニウム，ナトリウム，カリウム等の塩が好ましい。Ｐ
ＶＡ粉末中に予め含浸させるべき硼酸または硼酸塩水溶
液の量は、固型分換算で、ＰＶＡ１００重量部に対して
１〜２０重量部が好ましい。硼酸または硼酸塩の量が１
重量部未満では効果が小さく、２０重量部を超えると含
浸が難しく、それ以上の効果は得られない。硼酸水溶液
または硼酸塩水溶液の濃度はできるだけ高濃度が好まし
い。硼酸水溶液または硼酸塩水溶液をＰＶＡ粉末に含浸
させる場合、可能な限り高温で含浸させる方が好まし
い。本発明においてＰＶＡ粉末中に硼酸または硼酸塩水
溶液を予め含浸させることは重要で、予め含浸させるこ
となく、ＰＶＡ粉末と硼酸または硼酸塩粉末をブレンド
して用いても、後述する比較例３および４からも明らか
なように、繊維板の表面強度、繊維板の中間層の硬度に
大きな差が見られ、優れた強度、とくに優れた曲げ強度
を有する繊維板が得られない。 The boric acid or borate, which is a solute of the boric acid aqueous solution or borate aqueous solution in the present invention, is not particularly limited as long as it can be dissolved in water. That is, boric acid or a salt of ammonium, sodium, potassium or the like of boric acid is preferred. P
Boric acid or borate aqueous solution to be pre- impregnated into VA powder
The amount of the liquid is preferably 1 to 20 parts by weight based on 100 parts by weight of PVA in terms of solid content. The amount of boric acid or borate is 1
If the amount is less than 20 parts by weight, the effect is small, and if it exceeds 20 parts by weight, impregnation is difficult, and no further effect can be obtained. The concentration of the boric acid aqueous solution or borate aqueous solution is preferably as high as possible. When impregnating a PVA powder with a boric acid aqueous solution or a borate aqueous solution, it is preferable to impregnate at as high a temperature as possible. In the present invention, boric acid or borate water is contained in PVA powder.
It is important to pre-impregnate the solution.
Blend of PVA powder and boric acid or borate powder
It is also clear from Comparative Examples 3 and 4 described below.
The surface strength of the fiberboard and the hardness of the middle layer of the fiberboard
Great difference, excellent strength, especially excellent bending strength
Cannot be obtained.
【０００７】なお、本発明の繊維板の製造には必要に応
じて、クレー，炭酸カルシウム，タルク，シリカ，アル
ミナ，酸化マグネシウム，酸化カルシウム等の充填剤，
でんぷん，ポリエチレンイミン，フェノール樹脂，尿素
樹脂，メラミン樹脂等のバインダー，架橋剤，各種エマ
ルジョン，凝集剤等を併用してもよい。[0007] Incidentally, in the manufacture of fiberboard according to the invention, if necessary, clay, calcium carbonate, talc, silica, alumina, magnesium oxide, fillers such as calcium oxide,
Binders such as starch, polyethyleneimine, phenolic resin, urea resin and melamine resin, crosslinking agents, various emulsions, flocculants and the like may be used in combination.
【０００８】[0008]
【実施例】以下の実施例において特にことわりのない限
り、「％」および「部」とは、それぞれ「重量％」およ
び「重量部」を意味する。EXAMPLES In the following examples, "%" and "parts" mean "% by weight" and "parts by weight", respectively, unless otherwise specified.
【０００９】実施例１ ＰＶＡ１１７Ｓ｛（株）クラレ製のＰＶＡ，重合度１７
００，けん化度９８．５モル％，粒子径１００メッシュ
パス｝粉末１００部と８０℃にて溶解した硼砂の１３％
水溶液７７部を８０℃の温度を維持しながら、ニーダー
により３０分間混和し、硼砂をＰＶＡ１１７Ｓ粉末中に
含浸させた後、一昼夜風乾して硼砂含浸ＰＶＡ１１７Ｓ
サンプルを試作した。本サンプルの性能を確かめるた
め、次の試験を行なった。岩綿６４ｇ，上記試作硼砂含
浸ＰＶＡ１１７Ｓ粉末４ｇを２リットルの水中に投入
し、２０分間撹拌分散した分散液を１００メッシュ金網
上に流し脱水後、プレスにより厚さ１４ｍｍの湿潤状態
の無機質繊維板を得た。これを更に１７０℃で９０分間
乾燥することにより、比重０．３９，表面硬度９１，表
面から１ｍｍの深さの位置の硬度８９，表面から３ｍｍ
の深さの位置の硬度８７の無機質繊維位置を得た。この
無機質繊維板を８０℃の熱水中に投入したが、ふくれは
わずかであり、形くずれはなかった。Example 1 PVA117S ｛ PVA manufactured by Kuraray Co., Ltd., polymerization degree 17
00, saponification degree 98.5 mol%, particle size 100 mesh pass : 100 parts of powder and 13% of borax dissolved at 80 ° C
77 parts of the aqueous solution was mixed with a kneader for 30 minutes while maintaining the temperature at 80 ° C., and the borax was impregnated into the PVA117S powder.
Samples were prototyped. The following test was performed to confirm the performance of this sample. 64 g of rock wool and 4 g of the above-produced borax-impregnated PVA117S powder were put into 2 liters of water, and a dispersion obtained by stirring and dispersing for 20 minutes was poured on a 100-mesh wire net, followed by dehydration. Obtained. This was further dried at 170 ° C. for 90 minutes to obtain a specific gravity of 0.39, a surface hardness of 91, a hardness of 89 at a depth of 1 mm from the surface, and a thickness of 3 mm from the surface.
An inorganic fiber position having a hardness of 87 at a depth position of was obtained. This inorganic fiber board was put into hot water at 80 ° C., but the blister was slight and there was no deformation.
【００１０】実施例２ ＰＶＡ１１７Ｈ｛（株）クラレ製のＰＶＡ，重合度１７
００，けん化度９９．６モル％｝の６０メッシュパス粉
末１００部と９０℃にて溶解した硼砂の１６％水溶液６
３部を９０℃の温度を維持しながら、ニーダーにより３
０分間混和し、硼砂をＰＶＡ１１７Ｈ粉末中に含浸させ
たものをそのまま硼砂含浸ＰＶＡ１１７Ｈサンプルとし
た。本サンプルの性能を確かめるため、実施例１と同じ
方法により、無機質繊維板を作製した。得られた無機質
繊維板の比重は０．４０，表面硬度９１，表面から１ｍ
ｍの深さの位置の硬度８９，表面から３ｍｍの深さの位
置の硬度８７の無機質繊維板を得た。この無機質繊維板
を８０℃の熱水中に投入したが、ふくれはわずかであ
り、形くずれはなかった。[0010] Example 2 PVA117H {(manufactured by Kuraray Co., Ltd.) of PVA, degree of polymerization 17
00, 16% aqueous solution of borax dissolved in 60 mesh pass powder 100 parts of 90 ° C. degree of saponification of 99.6 mole%} 6
While maintaining a temperature of 90 ° C. for 3 parts,
After mixing for 0 minutes, the borax impregnated in the PVA117H powder was directly used as a borax-impregnated PVA117H sample. In order to confirm the performance of this sample, an inorganic fiber board was produced in the same manner as in Example 1. The specific gravity of the obtained inorganic fiber plate is 0.40, the surface hardness is 91, and 1 m from the surface.
An inorganic fiberboard having a hardness of 89 at a depth of m and a hardness of 87 at a depth of 3 mm from the surface was obtained. This inorganic fiber board was put into hot water at 80 ° C., but the blister was slight and there was no deformation.
【００１１】比較例１ 硼砂を含浸していないＰＶＡ１１７Ｓ粉末を用いて実施
例１と同様の方法によりテストしたが、表面硬度８６，
表面から１ｍｍの深さの位置の硬度８１，表面から３ｍ
ｍの深さの位置の硬度７５であった。Comparative Example 1 A test was conducted in the same manner as in Example 1 using PVA117S powder not impregnated with borax.
Hardness 81 at a depth of 1 mm from the surface, 3 m from the surface
The hardness at a depth of m was 75.
【００１２】実施例３ ＰＶＡＣＳＴ｛（株）クラレ製のＰＶＡ，重合度１７０
０，けん化度９６．０モル％｝の１００メッシュ粉末１
００部に９０℃にて溶解した硼酸の２０％水溶液５０部
を９０℃の温度を維持しながら、１時間噴霧混和し、硼
酸をＰＶＡＣＳＴ粉末中に含浸させたものをそのまま硼
酸含浸ＰＶＡＣＳＴ粉末サンプルとして使用した。本サ
ンプルの性能を確かめるため、次の試験を行なった。グ
ランドパルプ１００ｇ，上記試作硼酸含浸ＰＶＡＣＳＴ
粉末６ｇを３リットルの水中に投入し、６分間撹拌分散
した分散液を２０メッシュ金網上に流し脱水後、プレス
により厚さ２０ｍｍの湿潤状態の有機質繊維板を得た。
これを更に１６０℃にて２時間乾燥することにより、比
重の０．２１，曲げ強度１１．９Ｋｇ／ｃｍ2の軟質有
機繊維板を得た。Example 3 PVACST ｛ PVA manufactured by Kuraray Co., Ltd., polymerization degree 170
0, 100 mesh powder 1 degree of saponification of 96.0 mole%}
50 parts of a 20% aqueous solution of boric acid dissolved in 00 parts at 90 ° C. was spray-mixed for 1 hour while maintaining the temperature at 90 ° C., and boric acid impregnated in PVACST powder was directly used as a boric acid-impregnated PVACST powder sample. used. The following test was performed to confirm the performance of this sample. Ground pulp 100g, the above-mentioned trial boric acid impregnated PVACST
6 g of the powder was put into 3 liters of water, and the dispersion obtained by stirring and dispersing for 6 minutes was flowed on a 20-mesh wire net, followed by dehydration. Then, a wet organic fiber plate having a thickness of 20 mm was obtained by pressing.
By drying 2 hours which at further 160 ° C., 0.21 specific gravity, flexural strength 11.9 kg / cm 2 soft Yes
Machine fiberboard was obtained.
【００１３】実施例４ ＰＶＡ２２４｛（株）クラレ製のＰＶＡ，重合度２４０
０，けん化度９８．５モル％｝の３０メッシュ粉末１０
０部に７０℃にて溶解した硼酸アンモニウムの２０％水
溶液４０部を７０℃の温度を維持しながら３０分間噴霧
混合し、硼酸アンモニウムをＰＶＡ２２４粉末中に含浸
させたものをそのまま硼酸アンモニウム含浸ＰＶＡ２２
４粉末サンプルとして使用した。グランドパルプ１００
ｇ，上記試作硼酸アンモニウム含浸ＰＶＡ２２４粉末５
ｇを３リットルの水中に投入し、６分間撹拌分散した分
散液を２０メッシュ金網上に流し脱水後、プレスにより
厚さ２０ｍｍの湿潤状態の有機質繊維板を得た。これを
更に１６０℃にて２時間乾燥することにより、比重０．
２０，曲げ強度１１．８Ｋｇ／ｃｍ2の軟質繊維板を得
た。Example 4 PVA224 ｛ PVA manufactured by Kuraray Co., Ltd., degree of polymerization 240
0, 30 degree of saponification of 98.5 mole%} mesh powder 10
0 parts of a 20% aqueous solution of ammonium borate dissolved at 70 ° C. was spray-mixed for 30 minutes while maintaining the temperature at 70 ° C., and the ammonium borate impregnated in PVA224 powder was directly used as the ammonium borate-impregnated PVA22.
Used as 4 powder samples. Grand pulp 100
g, the above-mentioned prototype ammonium borate impregnated PVA224 powder 5
g of water was poured into 3 liters of water, and the dispersion obtained by stirring and dispersing for 6 minutes was poured onto a 20-mesh wire net, and after dehydration, a wet organic fiber plate having a thickness of 20 mm was obtained by pressing. This was further dried at 160 ° C. for 2 hours to obtain a specific gravity of 0.1.
20, a soft fiber board having a bending strength of 11.8 kg / cm 2 was obtained.
【００１４】比較例２ 硼酸塩を含浸していないＰＶＡ１１７Ｓ粉末を用いて実
施例３と同様の方法によりテストしたが、比重は０．１
８，曲げ強度４．３Ｋｇ／ｃｍ2と低い物性であった。Comparative Example 2 A test was conducted in the same manner as in Example 3 except that PVA117S powder not impregnated with borate was used.
8. The flexural strength was 4.3 Kg / cm 2 , which was low.
【００１５】比較例３Comparative Example 3
実施例１で用いたＰＶＡ−１１７Ｓ粉末１００部に硼砂Bora sand was added to 100 parts of the PVA-117S powder used in Example 1.
粉末１０部を粉体同士ブレンドしてサンプルとした。本A sample was prepared by blending 10 parts of powder with each other. Book
サンプルを使用し実施例１と同様の方法により試験したThe sample was tested in the same manner as in Example 1.
が、得られた無機質繊維板の表面硬度８８、表面から１Is from the surface hardness of the obtained inorganic fiber board of 88,
ｍｍの深さの位置の硬度８２、表面から３ｍｍの深さのHardness 82 at a depth of 3 mm, depth of 3 mm from the surface
位置の硬度７８であり、ＰＶＡが繊維板表面へ移行したHardness at position 78, PVA migrated to fiberboard surface
ためか、比較例１と同様に強度が不十分であった。For this reason, the strength was insufficient as in Comparative Example 1.
【００１６】比較例４Comparative Example 4
実施例３で用いたＰＶＡ−ＣＳＴ粉末１００部に硼酸１Boric acid 1 was added to 100 parts of the PVA-CST powder used in Example 3.
０部を粉体同士ブレンドしてサンプルとした。本サンプ0 parts were blended with each other to obtain a sample. Book sump
ルを使用して実施例３と同様の方法により試験したが、Using the same method as in Example 3, but
得られた有機繊維板の比重０．１９、曲げ強度６．５ＫSpecific gravity 0.19, bending strength 6.5K of the obtained organic fiber board
ｇ／ｃｍg / cm
2Two
と低い物性であった。And low physical properties.
【００１７】[0017]
【発明の効果】硼酸水溶液または硼酸塩水溶液を予め含
浸させたＰＶＡ粉末をバインダーとして使用することに
より、湿式法による繊維板抄造時に、硼酸または硼酸塩
を水中に流出させることなく湿潤繊維板を形成し、乾燥
時のＰＶＡの表面移行を抑制し、強度の優れた、またＰ
ＶＡ本来の耐水性、防カビ性を有する繊維板を得ること
ができる。 According to the present invention, by using a PVA powder pre-impregnated with a boric acid aqueous solution or a borate aqueous solution as a binder, a wet fiberboard can be formed without causing boric acid or borate to flow out into water during fiberboard sheeting by a wet method. The surface migration of PVA during drying is suppressed, and the strength is excellent.
To obtain a fiberboard having the original water resistance and mold resistance of VA
Can be.
Claims (1)
浸させたポリビニルアルコール粉末をバインダーとして
用いることを特徴とする湿式法による繊維板の製造方
法。1. A method for producing a fiber board by a wet method which comprises using a pre-containing <br/> polyvinyl alcohol powder was immersed boric acid aqueous solution or borate aqueous solution as a binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3185345A JP3016492B2 (en) | 1991-06-28 | 1991-06-28 | Fiberboard manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3185345A JP3016492B2 (en) | 1991-06-28 | 1991-06-28 | Fiberboard manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH055300A JPH055300A (en) | 1993-01-14 |
| JP3016492B2 true JP3016492B2 (en) | 2000-03-06 |
Family
ID=16169168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3185345A Expired - Fee Related JP3016492B2 (en) | 1991-06-28 | 1991-06-28 | Fiberboard manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3016492B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3395164B2 (en) | 1998-11-05 | 2003-04-07 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Semiconductor device |
-
1991
- 1991-06-28 JP JP3185345A patent/JP3016492B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH055300A (en) | 1993-01-14 |
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