JPS5950800B2 - Manufacturing method of inorganic fiberboard - Google Patents
Manufacturing method of inorganic fiberboardInfo
- Publication number
- JPS5950800B2 JPS5950800B2 JP49125794A JP12579474A JPS5950800B2 JP S5950800 B2 JPS5950800 B2 JP S5950800B2 JP 49125794 A JP49125794 A JP 49125794A JP 12579474 A JP12579474 A JP 12579474A JP S5950800 B2 JPS5950800 B2 JP S5950800B2
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- inorganic
- water
- weight
- fiberboard
- 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
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Paper (AREA)
Description
【発明の詳細な説明】 本発明は無機質繊維板の製法に関する。[Detailed description of the invention] The present invention relates to a method for manufacturing an inorganic fiberboard.
従来より無機質繊維板の製造は、例えば岩綿を多量に水
中にバインダーと共に分散させて抄造した後、加圧調厚
および加熱乾燥し、その後硬化することによつて行なわ
れていた。Conventionally, inorganic fiberboards have been produced by, for example, dispersing a large amount of rock wool in water with a binder, forming the paper, adjusting the thickness under pressure, drying by heating, and then curing the paper.
この際用いられるバインダーとしては各種デンプン、例
えば小麦粉デンプン、コンスターチ、馬れいしよデンプ
ンなどが用いられていた。しかしこれらデンプンをバイ
ンダーとして用いたのでは、得られる無機員繊維板は耐
水性能、とりわけ温水性能が悪く、吸湿膨潤し、機械的
性能が蓄しく低下する弱点があつた。またバインダーと
してポリビニルアルコールを用いると、加熱乾燥時にポ
リビニルアルコールが表面移行し、また熱風乾燥温度１
９０℃時に無機質繊維板が着色し、さらにまた無機質繊
維板に十分な硬さが得られないなどの欠点が現われ、ポ
リビニルアルコールのもつ優れた接着性能を活かすこと
ができない。本発明はこれらの欠点を改善したもので、
あらかじめ熱処理をほどこすことにより得た、濃度０．
２５重量％で３５℃の水に５分間攪拌した時の溶解割合
が５％以下の冷水に難溶でかつ熱水に可溶なポリビニル
アルコール粉末および硼酸またはその塩からなるバイン
ダーおよび無機實繊維を含有する水性スラリーを製板し
、次いで加熱乾燥することを特徴とする無機質繊維板の
製法である。As binders used in this case, various starches such as wheat flour starch, corn starch, and horse starch have been used. However, when these starches are used as binders, the resulting inorganic fiberboards have the disadvantages of poor water resistance, especially hot water performance, swelling upon absorption of moisture, and rapid deterioration of mechanical performance. Furthermore, if polyvinyl alcohol is used as a binder, the polyvinyl alcohol will migrate to the surface during heat drying, and the hot air drying temperature 1
At 90° C., the inorganic fiberboard becomes colored, and the inorganic fiberboard also has disadvantages such as insufficient hardness, making it impossible to take advantage of the excellent adhesive performance of polyvinyl alcohol. The present invention improves these drawbacks, and
A concentration of 0.0% obtained by applying heat treatment in advance.
Polyvinyl alcohol powder, which is sparingly soluble in cold water and soluble in hot water, has a dissolution rate of 5% or less when stirred in water at 35°C for 5 minutes at 25% by weight, a binder consisting of boric acid or its salt, and inorganic fiber. This is a method for manufacturing an inorganic fiberboard, which is characterized by forming a containing aqueous slurry into a board and then heating and drying it.
本発明によれば、あらか℃め熱処理をほどこし冷水への
溶解度を小さくしたポリビニルアルコール粉末および硼
酸またはその塩からなるバインダーを用いることにより
、製版時の無機質繊維スラリー中に分散したポリピニア
ルコール粉末の凝集ゲル化を防ぐと共にバインダーをよ
り均一に分散させ、かつ歩留り率を良くすることができ
、さらに加熱乾燥時においてポリピニアルコールが溶解
と同時に硼酸またはその塩によりゲル化し、ポリビニル
アルコールの表面移行を抑制するとともに強い接着力を
有する無機質繊維板を製造することができる。本発明で
用いるポリビニルアルコール粉末はあらかじめ熱処理し
て得た、濃度０．２５重量％で３５℃の水に５分間攪拌
した時の溶解割合が５％以下の冷水に難溶で、かつ熱水
に可溶なものであることが必要である。According to the present invention, polyvinyl alcohol powder is dispersed in an inorganic fiber slurry during plate making by using a binder consisting of polyvinyl alcohol powder that has been heat-treated to a certain temperature to reduce its solubility in cold water and boric acid or its salt. It is possible to prevent the agglomeration and gelation of the binder, to disperse the binder more uniformly, and to improve the yield rate.Furthermore, during heat drying, polyvinyl alcohol is simultaneously dissolved and gelatinized by boric acid or its salt, which prevents surface migration of polyvinyl alcohol. It is possible to produce an inorganic fiberboard having strong adhesive strength while suppressing the above. The polyvinyl alcohol powder used in the present invention is obtained by heat treatment in advance, has a concentration of 0.25% by weight, and has a dissolution rate of 5% or less when stirred in water at 35°C for 5 minutes. It needs to be soluble.
この要件を満たさないポリビニルアルコール粉末では後
述する実験１Ｎｏ、１に示すとおり、優れた強度を有す
る無機質繊維板を得ることができない。また冷水に可溶
なポリビニルアルコール粉末では製板時無機實繊維スラ
リー中に分赦したポリビニルアルコール粉末の凝集ゲル
化を防ぐことができず、またバインダーを均一に分散さ
せることができないし、さらにまた製板時に水とともに
ポリビニルアルコールが溶解流失してしまう。With polyvinyl alcohol powder that does not meet this requirement, an inorganic fiberboard with excellent strength cannot be obtained, as shown in Experiment No. 1, which will be described later. In addition, polyvinyl alcohol powder that is soluble in cold water cannot prevent the agglomeration and gelation of the polyvinyl alcohol powder that is dispersed in the inorganic fiber slurry during board making, and it is not possible to uniformly disperse the binder. During board making, polyvinyl alcohol dissolves and is washed away along with water.
また熱水に不溶なポリビニルアルコール粉末では加熱乾
燥時にポリビニルアルコール粉末が溶解しないので強度
の優れた無機質繊維板を得ることができない。また本発
明によればバインダーとして接着力の強い熱処理したポ
リピニルアルエール粉末および硼酸またはその塩を使用
しているので、デンプンに比べ無機質繊維板に対するポ
リピニルアルコル粉末の使用量を少なくすることができ
、有機質分の少ない無機質繊維板を得ることも可能であ
る。本発明においてはこれらの熱処理したポリビニルア
ルコール粉末および硼酸またはその塩からなるバインダ
ーをアスベスト、石綿、ガラス繊維、岩綿等の繊維長が
１〜１５０Ｅ，好ましくは２０〜３０□、直匣が４〜５
０μ、好ましくは５〜１０μめ無機質繊維と共に多量の
水中に配合し、水性スラリーとし、これを抄造または込
みなどにより製板し、次いで加熱乾燥することにより目
的とする無機質繊維を得ることができる。各成分の配合
配割合は無機質繊維１００重量部に対し熱処理したポリ
ビニルアルコール粉末２〜２０重量部、好ましくは３〜
１０重量部、硼酸またはその塩２〜５００重量部、好ま
しくは５〜１００重量部である。無機質繊維に対する熱
処理したポリビニルアルコール粉末および硼酸またはそ
の塩の配合割合が上記重量部以下では満足な接着効果が
得られず、またこれ以上ではいたずらに繊維板中の可燃
物の量を増大させるだけであるので好ましくない。また
使用する水の量は無機質繊維１００重量部に’対し２０
００〜２００００重量部が適当である。本本発明にお〜
・て使用する上記の特定のポリビニルアルコール粉末は
ポリビニルアルコール製造工．程中または製造後に熱処
理をほどこすことにより得ることができる。ポリビニル
アルコール粉末の鹸化度および重合度については、鹸化
度９５モル，、重合度１０００以上のものが好ましい。
また、ポリビニルアルコール粉末状で使用するの力、粒
．匝は１０メッシュバス、とくに５０メッシュバスの比
較的細かいものが適当である。本発明において硼酸また
はその塩とは、硼酸のほか硼砂、メタ硼酸ソース硼酸カ
リウム、硼酸アンモニウム等の水溶性の硼酸塩をさす。Furthermore, polyvinyl alcohol powder that is insoluble in hot water does not dissolve during heat drying, making it impossible to obtain an inorganic fiberboard with excellent strength. In addition, according to the present invention, heat-treated polypynyl alcohol powder with strong adhesive strength and boric acid or its salt are used as binders, so the amount of polypynyl alcohol powder used for the inorganic fiberboard can be reduced compared to starch. It is also possible to obtain an inorganic fiberboard with a low organic content. In the present invention, the heat-treated polyvinyl alcohol powder and the binder made of boric acid or its salt are used as fibers of asbestos, asbestos, glass fiber, rock wool, etc., with a fiber length of 1 to 150E, preferably 20 to 30□, and a straight box of 4 to 5
The desired inorganic fibers can be obtained by blending in a large amount of water with inorganic fibers having a diameter of 0 μm, preferably 5 to 10 μm, to form an aqueous slurry, making a plate by papermaking or molding, and then heating and drying. The mixing ratio of each component is 2 to 20 parts by weight, preferably 3 to 20 parts by weight of heat-treated polyvinyl alcohol powder per 100 parts by weight of inorganic fiber.
10 parts by weight, 2 to 500 parts by weight of boric acid or its salt, preferably 5 to 100 parts by weight. If the blending ratio of heat-treated polyvinyl alcohol powder and boric acid or its salt to the inorganic fibers is less than the above weight part, a satisfactory adhesion effect cannot be obtained, and if it is more than this, the amount of combustible matter in the fiberboard will increase unnecessarily. I don't like it because it is. The amount of water used is 20 parts by weight per 100 parts by weight of inorganic fibers.
00 to 20,000 parts by weight is suitable. The present invention
・The above specific polyvinyl alcohol powder used in polyvinyl alcohol manufacturing process. It can be obtained by applying heat treatment during or after production. Regarding the degree of saponification and degree of polymerization of the polyvinyl alcohol powder, it is preferable that the degree of saponification is 95 mol and the degree of polymerization is 1000 or more.
In addition, the power of using polyvinyl alcohol powder, granules. A relatively fine container such as a 10 mesh bath, especially a 50 mesh bath, is suitable. In the present invention, boric acid or a salt thereof refers to water-soluble borates such as borax, metaboric acid source potassium borate, and ammonium borate in addition to boric acid.
本発明においてはデンプン、ポリアクリルアミド、カル
ボキシメチルセルロースのような水溶性高分子やカチオ
ン系、アニオン系等のラテックスやエマルジョンを併用
することは自由である。In the present invention, water-soluble polymers such as starch, polyacrylamide, and carboxymethyl cellulose, as well as cationic and anionic latexes and emulsions may be used in combination.
さらに本発明の組成物に種種の目的に応じて、各種充填
剤、防腐剤、難燃処理斉ワックス等を混入させることも
できる。本発明により得られた無機質繊維板は天井材、
壁材など建築用板として用いられる。Furthermore, various fillers, preservatives, flame-retardant waxes, etc. may be mixed into the composition of the present invention depending on the purpose. The inorganic fiberboard obtained by the present invention can be used as a ceiling material,
Used as architectural boards such as wall materials.
次に実施例により本発明を説明する。Next, the present invention will be explained with reference to examples.
実施例１
無機質繊維としてロックウールを用い、表１のような組
成でロックウール板を抄造した後、熱風乾燥機中で１６
０゜ｃ、３時間加熱乾燦後、できたロックウール板を厚
さ１０−巾２０ｎａ，長さ７０−の大きさにサンプリン
グし、これを２０℃、Ｒ．Ｈ．６５％の条件に調湿後、
曲げ強度を澗淀し島比較のため熱処理しないポリビニル
アルコール系について同様な条件で実験を行ない、結果
を表１に併記した。Example 1 Using rock wool as the inorganic fiber, a rock wool board was formed with the composition shown in Table 1, and then dried in a hot air dryer for 16 minutes.
After heating and drying at 0°C for 3 hours, the resulting rock wool board was sampled to a size of 10mm thick, 20mm wide and 70mm long, and heated at 20°C, R. H. After adjusting the humidity to 65%,
In order to determine the bending strength and to compare the results, an experiment was conducted under similar conditions using polyvinyl alcohol without heat treatment, and the results are also listed in Table 1.
表１から、本発明の実験１ＮＱ２〜４の組成物をバイン
ダーとして用いて抄造し、加熱乾燥して得たロックウー
ル板は優れた曲げ強度を示しているのみならず、抄造時
のポリビニルアルコールの凝集がなく、作業性も良好で
あることがわかる。From Table 1, it can be seen that the rock wool boards obtained by papermaking using the compositions of Experiment 1NQ2 to 4 of the present invention as binders and heating and drying not only exhibit excellent bending strength, but also It can be seen that there is no aggregation and the workability is good.
なお上記熱処理条件の異なるＰＶＡｌｌ７ＨＳを３５℃
の水にそれぞれ０．２５重量％になるよう添加し、５分
間攪拌し、濾液の濃度及び添加したＰＶＡｌｌ７ＨＳに
対する溶解したＰＶＡｌｌ７ＨＳの％を表２に示す。ま
た９５℃の水に５分間添加したときの溶解性も併せて表
２に示す。表２から、ＰＶＡｌｌ７ＨＳの溶解割合は、
添加する水に対するＰＶＡｌｌ７ＨＳの添加割合にょり
異なるが、約５％以下が表１に示すとおり抄造時に凝集
が少なく、また加熱乾燥後の曲げ強度も優れていること
がわかる。実施例２
実施例１の実験ＮＱ３に於てＰＶＡｌｌ７ＨＳの代りに
ＰＶＡＨＳ）ＰＶＡＩｌ７Ｓを用い、熱処理条件１３０
℃、２０分を前もつて行なつてから、実施例１と同じ条
件でロックウールを抄造し、次いで加熱乾燥して、ロッ
クウール板を得た。In addition, PVAll7HS with different heat treatment conditions mentioned above was heated at 35°C.
of water at a concentration of 0.25% by weight, and stirred for 5 minutes. The concentration of the filtrate and the percentage of dissolved PVAll7HS relative to the added PVAll7HS are shown in Table 2. Table 2 also shows the solubility when added to water at 95°C for 5 minutes. From Table 2, the dissolution rate of PVAAll7HS is
Although it varies depending on the ratio of PVAll7HS added to the added water, as shown in Table 1, when it is about 5% or less, there is little aggregation during paper making, and the bending strength after heating and drying is also excellent. Example 2 In Experiment NQ3 of Example 1, PVAHS)PVAIl7S was used instead of PVAAll7HS, and heat treatment conditions were 130.
℃ for 20 minutes, rock wool was made into paper under the same conditions as in Example 1, and then heated and dried to obtain a rock wool board.
このロックウール板の曲げ強度を表３に示す。表３から
、熱処理をほどこして水への溶解度を低下させたポリビ
ニルアルコール粉末を使用すれば抄造時に凝集がなく、
また加熱乾燥後強度の優れた着色のないロックウール板
を得ることができることがわかる。Table 3 shows the bending strength of this rock wool board. From Table 3, it can be seen that if polyvinyl alcohol powder that has been heat-treated to reduce its solubility in water is used, there will be no agglomeration during paper making.
It is also seen that a color-free rock wool board with excellent strength after heat drying can be obtained.
Claims (1)
０．２５重量％で３５℃の水に５分間攪拌した時の溶解
割合が５％以下の冷水に難溶でかつ熱水に可溶なポリビ
ニルアルコール粉末と硼酸またはその塩からなるバイン
ダーおよび無機質繊維を含有する水性スラリーを製版し
、次いで加熱乾燥することを特徴とする無機質繊維板の
製法。1 Polyvinyl alcohol that is slightly soluble in cold water and soluble in hot water, with a concentration of 0.25% by weight and a dissolution rate of 5% or less when stirred in water at 35°C for 5 minutes, obtained by heat treatment in advance. A method for producing an inorganic fiberboard, which comprises making an aqueous slurry containing powder, a binder made of boric acid or its salt, and inorganic fibers, and then heating and drying the slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49125794A JPS5950800B2 (en) | 1974-10-31 | 1974-10-31 | Manufacturing method of inorganic fiberboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49125794A JPS5950800B2 (en) | 1974-10-31 | 1974-10-31 | Manufacturing method of inorganic fiberboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5153070A JPS5153070A (en) | 1976-05-11 |
| JPS5950800B2 true JPS5950800B2 (en) | 1984-12-10 |
Family
ID=14919028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49125794A Expired JPS5950800B2 (en) | 1974-10-31 | 1974-10-31 | Manufacturing method of inorganic fiberboard |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5950800B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155188U (en) * | 1987-03-31 | 1988-10-12 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49101487A (en) * | 1972-12-13 | 1974-09-25 | ||
| JPS5015869A (en) * | 1973-06-12 | 1975-02-19 |
-
1974
- 1974-10-31 JP JP49125794A patent/JPS5950800B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155188U (en) * | 1987-03-31 | 1988-10-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5153070A (en) | 1976-05-11 |
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