JPS6154749B2 - - Google Patents
Info
- Publication number
- JPS6154749B2 JPS6154749B2 JP9572180A JP9572180A JPS6154749B2 JP S6154749 B2 JPS6154749 B2 JP S6154749B2 JP 9572180 A JP9572180 A JP 9572180A JP 9572180 A JP9572180 A JP 9572180A JP S6154749 B2 JPS6154749 B2 JP S6154749B2
- Authority
- JP
- Japan
- Prior art keywords
- mica
- water
- polyvinyl alcohol
- fibers
- paper
- 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
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
本発明は音響振動板、断熱材、電気絶縁材等と
して有用な集成マイカ多泡構造物の製造法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a multicellular mica structure useful as an acoustic diaphragm, a heat insulator, an electrical insulator, and the like.
従来、マイカを水ゼツト等により粉砕して得ら
れる８〜400メツシユの微細マイカ鱗片を抄紙機
等により抄造し、得られた抄造物に合成樹脂液を
含浸させて硬化させたものは電気絶縁体、断熱材
として使用されている。 Conventionally, fine mica scales of 8 to 400 meshes obtained by crushing mica with water zest, etc., are made into paper using a paper machine, etc., and the resulting paper product is impregnated with a synthetic resin liquid and cured to produce an electrical insulator. , used as insulation material.
また、本発明者はさきに、微細マイカ鱗片とパ
ルプ繊維とよりなる混合基材を水中に均一に分散
させた後、これを抄造し、これに合成樹脂液を含
浸させ、加熱硬化させたものは音響振動板として
有用なものであることを明らかにした。 In addition, the present inventor first uniformly dispersed a mixed base material consisting of fine mica scales and pulp fibers in water, then made a paper from it, impregnated it with a synthetic resin liquid, and cured it by heating. It was revealed that this material is useful as an acoustic diaphragm.
しかし、従来の集成マイカ構造物は見掛密度が
大きく、例えば前記音響振動板の見掛密度は1.0
〜1.5ｇ/cm3の値を示す。 However, conventional laminated mica structures have a large apparent density; for example, the apparent density of the acoustic diaphragm is 1.0.
It shows a value of ~1.5g/ cm3 .
本発明の目的は見掛密度の小さい集成マイカ構
造物を提供せんとするものであり、これを多泡構
造物とする製造法を提供するにある。 An object of the present invention is to provide a composite mica structure having a low apparent density, and to provide a method for manufacturing this into a multicellular structure.
本発明者らは前記目的を達成せんと研究の結
果、８〜400メツシユの微細マイカ鱗片に、強度
賦与材としてのパルプ繊維と共に、ポリビニルア
ルコール繊維を混合し、水溶性樹脂または合成樹
脂エマルジヨンを含有させ、あるいは含有しない
水中に均一に分散させた後、これを抄紙機等によ
り抄造し、得られた抄造物を加熱することによつ
て多泡性の集成マイカ構造物となし得ることを究
明し得た。この究明事実に基いて本発明を完成し
た。 As a result of research to achieve the above object, the present inventors mixed 8 to 400 meshes of fine mica scales with pulp fibers as a strength imparting material and polyvinyl alcohol fibers, and contained water-soluble resin or synthetic resin emulsion. They discovered that it is possible to make a foamed mica structure by dispersing it uniformly in water that does not contain it or making it into a paper using a paper machine, etc., and then heating the resulting paper product. Obtained. The present invention was completed based on this finding.
本発明はポリビニルアルコール繊維を特に利用
して多泡構造物を製造したものである。ポリビニ
ルアルコール繊維は室温においては水不溶性であ
るが、60〜90℃では水に可溶化し、液状結合剤と
なる。前記のようにして得られた湿潤状態の抄造
物を60〜90℃に加熱すると、熱は抄造物の表面よ
り内部に向つて伝達し、厚さ方向に温度の傾斜を
生じ、表面付近の温度が最も高いので、表面部に
あるポリビニルアルコール繊維が可溶化して液状
となり、これが001面に平行に配位している微細
マイカ鱗片とパルプ繊維および不溶解ポリビニル
アルコール繊維とのからみ合い構造中に浸透す
る。これと共に抄造物表面に水蒸気の通過を妨げ
る表皮を形成する。この状態では内部には未気化
の水分が存在する。これを100℃以上に加熱する
と、内部に存在する水分が蒸発して、球状の独立
気泡を生ずる。この加熱温度が100℃より低い温
度では発泡しない。得られる多泡構造物の見掛比
重は0.05〜0.10ｇ/cm3を示し、強固な構造物であ
る。 The present invention specifically utilizes polyvinyl alcohol fibers to produce a cellular structure. Polyvinyl alcohol fibers are insoluble in water at room temperature, but become soluble in water at 60 to 90°C and become a liquid binder. When the wet paper product obtained as described above is heated to 60 to 90°C, heat is transmitted from the surface of the paper product inward, creating a temperature gradient in the thickness direction, and the temperature near the surface increases. is the highest, so the polyvinyl alcohol fibers on the surface are solubilized and become liquid, which forms an intertwined structure of fine mica scales arranged parallel to the 001 plane, pulp fibers, and undissolved polyvinyl alcohol fibers. Penetrate. At the same time, a skin is formed on the surface of the paper product that prevents the passage of water vapor. In this state, unvaporized moisture exists inside. When this is heated above 100°C, the moisture present inside evaporates, forming spherical closed cells. Foaming does not occur when this heating temperature is lower than 100°C. The resulting multicellular structure has an apparent specific gravity of 0.05 to 0.10 g/cm 3 and is a strong structure.
この見掛比重を更に低下させて、発泡倍率
（真の密度／見掛の密度）を上げる必要があるときは、
発泡
剤を抄造物に添加することによつて達成し得られ
る。 When it is necessary to further reduce this apparent specific gravity and increase the foaming ratio (true density/apparent density),
This can be achieved by adding a blowing agent to the paper product.
また、前記したように、必要に応じ、抄造する
際の水中に水溶性樹脂、合成樹脂エマルジヨンお
よびゴムラテツクス等の接着剤の１種または２種
以上を混合してもよく、また抄造後、得られた抄
造物に前記のような接着剤を含浸させた後、加熱
してもよい。 Furthermore, as described above, one or more types of adhesives such as water-soluble resins, synthetic resin emulsions, and rubber latex may be mixed in the water during papermaking, if necessary. The paper product may be impregnated with the adhesive as described above and then heated.
微細マイカ鱗片の粒度は８〜400メツシユのも
のが好ましく、パルプ繊維、およびポリビニルア
ルコール繊維の長さはいずれも３〜10mmが好まし
い。 The particle size of the fine mica scales is preferably 8 to 400 mesh, and the length of the pulp fiber and polyvinyl alcohol fiber is preferably 3 to 10 mm.
微細マイカ鱗片100重量部に対し、パルプ繊維
５〜50重量部、ポリビニルアルコール繊維５〜50
重量部であることが好ましい。抄造における混合
基材の濃度は３〜20％であることが好ましい。し
かし、必ずしもこの範囲であることを必要としな
い。 100 parts by weight of fine mica scales, 5 to 50 parts by weight of pulp fiber, 5 to 50 parts by weight of polyvinyl alcohol fiber
Parts by weight are preferred. The concentration of the mixed base material in papermaking is preferably 3 to 20%. However, it does not necessarily have to be within this range.
以上のように本発明の方法によると、極めて簡
単な方法で見掛密度の極めて小さい多泡性の集成
マイカ構造物が容易に得られ、しかも繊維で補強
され強固なものであり、音響振動板、断熱材電気
絶縁材等として優れたものである。 As described above, according to the method of the present invention, a porous mica laminated structure with an extremely low apparent density can be easily obtained by an extremely simple method, and it is also reinforced with fibers and strong, and can be used as an acoustic diaphragm. It is excellent as a heat insulating material, electrical insulation material, etc.
実施例
８〜150メツシユのマイカ鱗片100ｇ、パルプ繊
維20ｇ、ポリビニルアルコール繊維30ｇを水４Kg
中に入れ、十分に撹拌混合分散させた。この懸濁
液200ｇを分取し、200×200mmの大きさに抄造し
た。この抄造物を80℃に加熱した後、予め間隙を
調整した金型の間に挿入し、150℃で30分間加熱
した。厚さ4.2mm、重量9.6ｇ、面密度0.024ｇ/
cm3、見掛密度0.057ｇ/cm3の集成マイカ発泡構造物
が得られた。Example 100g of mica scales of 8 to 150 meshes, 20g of pulp fiber, 30g of polyvinyl alcohol fiber and 4kg of water
and thoroughly stirred and dispersed. 200 g of this suspension was taken out and made into a paper with a size of 200 x 200 mm. After heating this paper product to 80°C, it was inserted between molds whose gap had been adjusted in advance, and heated at 150°C for 30 minutes. Thickness 4.2mm, weight 9.6g, areal density 0.024g/
cm 3 and an apparent density of 0.057 g/cm 3 was obtained.
Claims (1)
ルアルコール繊維とからなる混合基材を、水中に
均一に分散させた後抄造し、得られた抄造物を60
〜90℃にし、次いで100℃以上に加熱して多泡構
造を形成せしめることを特徴とする集成マイカ多
泡構造物の製造法。1. A mixed base material consisting of fine mica scales, pulp fibers and polyvinyl alcohol fibers is uniformly dispersed in water and then made into a paper sheet.
1. A method for producing a multicellular mica structure, which comprises heating to ~90°C and then heating to 100°C or higher to form a multicellular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572180A JPS5722158A (en) | 1980-07-15 | 1980-07-15 | Manufacture of integrated mica foamed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572180A JPS5722158A (en) | 1980-07-15 | 1980-07-15 | Manufacture of integrated mica foamed structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5722158A JPS5722158A (en) | 1982-02-05 |
| JPS6154749B2 true JPS6154749B2 (en) | 1986-11-25 |
Family
ID=14145332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9572180A Granted JPS5722158A (en) | 1980-07-15 | 1980-07-15 | Manufacture of integrated mica foamed structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5722158A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007028525A (en) * | 2005-07-21 | 2007-02-01 | Sony Corp | Acoustic diaphragm and acoustic diaphragm manufacturing method |
| US9521490B2 (en) | 2012-03-14 | 2016-12-13 | Pioneer Corporation | Speaker diaphragm and production method for speaker diaphragm |
| WO2014141390A1 (en) * | 2013-03-12 | 2014-09-18 | パイオニア株式会社 | Speaker diaphragm, and speaker device |
-
1980
- 1980-07-15 JP JP9572180A patent/JPS5722158A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5722158A (en) | 1982-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5013405A (en) | Method of making a low density frothed mineral wool | |
| US3042578A (en) | Insulating product and its manufacture | |
| US3015626A (en) | Insulating composition | |
| CN102226325B (en) | A kind of far infrared carbon fiber low temperature conductive heating paper and preparation method thereof | |
| US4130687A (en) | Inorganic foam | |
| DE3100655A1 (en) | "INORGANIC FOAM PRODUCT" | |
| KR102005153B1 (en) | Non-woven structure for heat insulating materials including aerogel foaming layer | |
| JPS6025540B2 (en) | Expandable ceramic fiber felt | |
| CN110241613A (en) | A kind of flexible ultra-thin high thermal conductivity electromagnetic wave shield film and preparation method thereof | |
| TW421988B (en) | Radio wave absorbing materials, radio wave absorber, and radio wave anechoic chamber and the like made by using the same | |
| CN113079451B (en) | Foaming cone for loudspeaker and preparation method and application thereof | |
| JPS6154749B2 (en) | ||
| US3022213A (en) | Conductive web and method of making same | |
| DE2716152C2 (en) | Vermiculite lamellar product, process for its manufacture and its use | |
| US3215590A (en) | Mica sheet composite and method of making same | |
| CN109648678B (en) | Wood fiber-coconut fiber composite sound absorption material and preparation method thereof | |
| CN114957783A (en) | Inorganic fiber composite foam material and preparation method thereof | |
| JP2818862B2 (en) | Sound insulation plate and method of manufacturing the same | |
| CN110373906B (en) | High-strength heat-conducting GMT composite board and preparation method thereof | |
| JPS6088198A (en) | Conductive fiber mat | |
| JPH0544149A (en) | Non-oriented nonwoven fabric and its production | |
| JPH03124407A (en) | Production of high-conductivity carbon fiber structural body | |
| US3108926A (en) | Production of sheet structures comprising fibrous materials and glass flakelets | |
| JPS6311757B2 (en) | ||
| US1868566A (en) | Process of manufacturing phenol-formaldehyde resin sheets and forms |