JPH01175105A - Dry mica molding material - Google Patents
Dry mica molding materialInfo
- Publication number
- JPH01175105A JPH01175105A JP33029487A JP33029487A JPH01175105A JP H01175105 A JPH01175105 A JP H01175105A JP 33029487 A JP33029487 A JP 33029487A JP 33029487 A JP33029487 A JP 33029487A JP H01175105 A JPH01175105 A JP H01175105A
- Authority
- JP
- Japan
- Prior art keywords
- mica
- dry
- varnish
- resin
- layer
- 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.)
- Granted
Links
- 239000010445 mica Substances 0.000 title claims abstract description 83
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 83
- 239000012778 molding material Substances 0.000 title claims description 10
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims 1
- 238000005470 impregnation Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 4
- 239000002648 laminated material Substances 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000002966 varnish Substances 0.000 description 32
- 239000000463 material Substances 0.000 description 14
- 239000011521 glass Substances 0.000 description 13
- 239000004744 fabric Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 239000003822 epoxy resin Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 239000004359 castor oil Substances 0.000 description 2
- 235000019438 castor oil Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000002747 voluntary effect Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- RJDOZRNNYVAULJ-UHFFFAOYSA-L [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] RJDOZRNNYVAULJ-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000004590 silicone sealant Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Inorganic Insulating Materials (AREA)
- Insulated Conductors (AREA)
- Insulating Bodies (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ドライマイカ成形材料に係り、特に回転電機
等のコイルに使用されるドライマイカテープのフェス含
浸性、保持性を改善したものに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dry mica molding material, and more particularly to a dry mica tape used for coils of rotating electric machines, etc., which has improved face impregnation and retention properties.
従来の技術
発電機や電動機あるいは静止機等に用いられるコイルに
は、特に高電圧、高容量型のものでは耐電圧特性等電気
的、熱的特性に優れているマイカ材料が絶縁材料として
使用されている。このマイカ材料にはマイカを裏打材と
ともに巻線に巻き付けた後フェスを真空加圧含浸させ、
その後加熱加圧してコイルを成形するときに用いられる
ドライマイカテープがある。Conventional technology Mica material, which has excellent electrical and thermal properties such as withstand voltage properties, is used as an insulating material for coils used in generators, electric motors, stationary machines, etc., especially for high-voltage, high-capacity types. ing. For this mica material, mica is wrapped around a winding wire together with a backing material, and then the face is impregnated with vacuum pressure.
There is a dry mica tape that is used when heating and pressurizing it to form a coil.
このドライマイカテープを電機子巻線に適用するには、
第５図に示すように導体に絶縁被覆を施した複数本の絶
縁電線ａ、ａ・・からなるコイル中
本体すに巻きつけられたてマイカ層が形成された後、フ
ェスを含浸されるが、この際ボイドが発生すると絶縁破
壊電圧を小さくするのでその発生を抑制する工夫が行わ
れている。To apply this dry mica tape to the armature winding,
As shown in Fig. 5, after a mica layer is formed by winding around the inner body of a coil consisting of a plurality of insulated wires a, a, etc. with insulation coating applied to the conductor, the face is impregnated. At this time, if voids occur, the dielectric breakdown voltage is reduced, so measures have been taken to suppress their occurrence.
例えば含浸するワニスを加温してワニスの粘度を下げた
り、含浸の際に真空度を高くしたり、ドライマイカテー
プをコイル本体に巻きつけるときにゆるくしたり、ある
いは真空含浸した後に加圧したりすることによりワニス
の浸透をし易くしている。For example, heating the varnish to be impregnated to lower the viscosity of the varnish, increasing the degree of vacuum during impregnation, loosening the dry mica tape when wrapping it around the coil body, or applying pressure after vacuum impregnation. This makes it easier for the varnish to penetrate.
発明が解決しようとする問題点
しかしながら、このような工夫を行なってもワニスを隈
無く十分に浸透させることは容易ではなく、ワニス含浸
不十分によるボイドの発生により絶縁破壊電圧を規定以
上にできないというコイルの不良は、その率にして数％
にもなるという問題点がある。Problems to be Solved by the Invention However, even with such efforts, it is not easy to thoroughly infiltrate the varnish, and the dielectric breakdown voltage cannot exceed the specified level due to the generation of voids due to insufficient varnish impregnation. The rate of coil defects is a few percent.
There is also the problem that it becomes
また、このようにワニスの含浸性が不十分であると、耐
熱性及び電気絶縁性のよい例えばエポキシ樹脂の性質を
十分に発揮することができず、その絶縁性の電気特性を
十分に発揮することができない。In addition, if the impregnating properties of the varnish are insufficient in this way, the properties of, for example, epoxy resin, which have good heat resistance and electrical insulation properties, cannot be fully demonstrated, and the electrical properties of the insulating properties cannot be fully demonstrated. I can't.
本発明の目的は、例えば巻回して使用されるドライマイ
カテープのように使用形態で樹脂をさらに含浸させるよ
うなドライマイカ成形材料において、樹脂の含浸性及び
保持性を向上させることができるドライマイカ成形材料
を提供するものである。An object of the present invention is to provide dry mica that can improve resin impregnation and retention properties in dry mica molding materials that are further impregnated with resin in the usage form, such as dry mica tape that is used by winding. It provides molding materials.
問題点を解決するための手段
本発明は、上記問題点を解決するために、マイカを主成
分に有するマイカ層と含浸性シートを層状に接着して有
する層状体において、含浸性シートとこれに隣接する他
の層とをこれらの赤面に樹脂を偏在させることにより接
着させたことを特徴とするドライマイカ成形材料を提供
するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a layered body having a mica layer containing mica as a main component and an impregnated sheet bonded together in a layered manner. The present invention provides a dry mica molding material characterized in that it is bonded to other adjacent layers by unevenly distributing a resin on these red surfaces.
次に本発明の詳細な説明する。Next, the present invention will be explained in detail.
本発明において使用するマイカは天然又は合成のいずれ
のマイカも使用できるが、゛経済性に有利な天然マイカ
を使用することが好ましい。このマイカには、通常はお
よそ２ｍｍ以下に粉砕したマイカを例えば抄紙と同じ方
法で紙状に抄造した集成マイカを使用することが好まし
い。この集成マイカには、マイカを例えば約７５０℃で
焼いて結晶水の一部を除いた後に粉砕、抄造する、いわ
ゆる焼成集成マイカ、焼かないで粉砕、抄造する、いわ
ゆる無焼成集成マイカのいずれも使用でき、またこれら
を併用することもできる。また、マイカとしては軟質、
硬質のマイカ片のいずれも使用できる。このマイカ層は
、マイカを主成分に有するが、その強度を維持するため
にアラミツド繊維やセルローズ繊維、ガラス繊維等の有
機、無機の繊維を併用しても良い。Although either natural or synthetic mica can be used as the mica used in the present invention, it is preferable to use natural mica because it is economically advantageous. As the mica, it is preferable to use laminated mica, which is usually made from mica that has been crushed to about 2 mm or less and made into a paper shape using the same method as paper making. This laminated mica includes both so-called fired laminated mica, in which mica is fired at about 750°C to remove some of the crystallized water, and then crushed and made into paper, and so-called unfired laminated mica, in which mica is crushed and made into paper without baking. These can be used together or in combination. In addition, mica is soft,
Any piece of hard mica can be used. This mica layer has mica as a main component, but in order to maintain its strength, organic and inorganic fibers such as aramid fibers, cellulose fibers, and glass fibers may be used in combination.
本発明において使用される含浸性シートとしては、例え
ばドライマイカテープをコイル本体にオーバラップして
巻付けたときにこの含浸性シートを通路としてワニスが
浸透することのできる通液性を有するものが使用でき、
具体的には不織布が挙げられる。この不織布には、乾式
法、湿式法いずれでも良いポリエステル不織布、アラミ
ツド不織布等の合成繊維不織布や、ガラス不織布、無機
ペーパー（バインダー等有機物が１０％以下のもの）等
の無機繊維不織布、紙等が挙げられるが、吸液性の大き
いものが好ましい。The impregnated sheet used in the present invention is one that has liquid permeability that allows the varnish to penetrate through the impregnated sheet as a passage when the dry mica tape is wrapped around the coil body, for example. can be used,
Specifically, nonwoven fabrics are mentioned. This non-woven fabric includes synthetic fiber non-woven fabrics such as polyester non-woven fabrics and aramid non-woven fabrics which can be produced by either dry or wet processes, glass non-woven fabrics, inorganic fiber non-woven fabrics such as inorganic paper (those containing 10% or less organic matter such as binder), and paper. However, those with high liquid absorption properties are preferred.
本発明においては、含浸性シートとマイカ層を層状に有
するもので、これらのほかに他の層、例えば裏打材を有
することもできる。含浸性シートの使用形態はマイカ層
の片側あるいは両側に用いマイカ層の裏打材を兼用する
こともでき、また、他の裏打材に裏打されたマイカ層の
表面又は裏打材の表面に用いることもできる。また、マ
イカ層の層内に用いても良い。In the present invention, the impregnated sheet and the mica layer are layered, and in addition to these, other layers such as a backing material can also be provided. The impregnated sheet can be used on one or both sides of the mica layer and can also serve as a backing material for the mica layer, or can be used on the surface of a mica layer backed by another backing material or on the surface of a backing material. can. Further, it may be used within a mica layer.
裏打材としてはガラスクロス、ポリオレフィンフィルム
、ポリエステルフィルム等のプラスチックフィルム等、
紙、ガラスヤーン（商品名タテソフヤーンやヤーンを縦
横に接着させたもの）等が使用できる。このように裏打
材を併用すると、マイカ層に例えばコイル本体にドライ
マイカテープを巻回するときの強度を付与でき、含浸性
シートにはワニスの含浸性と保持性をよくする機能のみ
を分担させることができ、その使用する厚さや材質等に
おいて選択の幅を広げることができる。Backing materials include glass cloth, polyolefin film, plastic film such as polyester film, etc.
Paper, glass yarn (trade name: Vertical Soft Yarn, yarn glued vertically and horizontally), etc. can be used. When used in combination with a backing material in this way, the mica layer can be given strength when, for example, dry mica tape is wound around the coil body, and the impregnable sheet only has the function of improving varnish impregnation and retention. This allows for a wider range of choices in terms of the thickness, material, etc. to be used.
本発明においては、上記含浸性シート、マイカ層、裏打
材等は層状にして接着させ層状体を形成するが、この際
含浸性シートと他のマイカ層、裏打材等はその界面に樹
脂を偏在させることにより接着される。この方法として
は、含浸性シートと他の層とに熱接着性のシート（例え
ばエチレン−酢酸ビニル樹脂）を介在させ、熱融着させ
ることもできるが、裏打材とマイカ層の従来の接着方法
のように、含浸性シート側から樹脂を含浸させ、ついで
例えば未乾燥状態で溶剤を塗布したロールと抑えロール
の間を通し、含浸性シートを接着させる他の層との界面
の樹脂を残して他の樹脂を熔解除去するようにしても良
い。このようにすると、含浸性シート内の樹脂が溶出さ
れるので、例えばドライマイカテープとしてコイル本体
に巻回してからワニスを含浸させるときにその通りが良
くなり、オーバラップされたドライマイカテープの内部
にワニスが良く浸透することができる。In the present invention, the above-mentioned impregnated sheet, mica layer, backing material, etc. are layered and adhered to form a layered body. At this time, the impregnated sheet, other mica layer, backing material, etc. have resin unevenly distributed at their interface. It is bonded by letting it stick. As a method for this, it is also possible to interpose a heat-adhesive sheet (for example, ethylene-vinyl acetate resin) between the impregnated sheet and other layers and heat-seal them, but the conventional method of bonding the backing material and the mica layer As shown in the figure, the impregnated sheet is impregnated with resin from the side, and then, for example, the impregnated sheet is passed between a roll coated with a solvent and a holding roll in an undried state, leaving the resin at the interface with other layers to which the impregnated sheet is bonded. Other resins may be removed by melting. In this way, the resin in the impregnating sheet is eluted, so when the dry mica tape is wound around the coil body and then impregnated with varnish, it will flow better, and the inside of the overlapped dry mica tape The varnish can penetrate well.
上記の含浸性シート、裏打材、マイカ層を接着させる接
着剤は、エポキシ樹脂、シリコーン樹脂等が使用できる
が、アクリル樹脂、ポリブタジェン、ポリウレタン樹脂
等も使用できる。As the adhesive for bonding the impregnated sheet, backing material, and mica layer, epoxy resin, silicone resin, etc. can be used, but acrylic resin, polybutadiene, polyurethane resin, etc. can also be used.
作用
含浸性シートと他の例えばマイカ層との接着を樹脂をそ
の界面に偏在させることにより行ったので、例えばドラ
イマイカテープをコイル本体に巻回した後ワニスを含浸
させるときに含浸性シートがワニスの案内通路になって
その浸透を良く行うことができ、その保持量も多くでき
る。Function: Since the adhesion between the impregnated sheet and another layer, such as a mica layer, is achieved by unevenly distributing the resin at the interface, for example, when a dry mica tape is wound around the coil body and then impregnated with varnish, the impregnated sheet will not be coated with the varnish. It becomes a guide path for the water to penetrate well, and the amount of water it retains can be increased.
実施例 次に本発明の一実施例を図面に基づいて説明する。Example Next, one embodiment of the present invention will be described based on the drawings.
第１図に示すように、厚さ０．１６ ｔｍの硬質無焼成
集成マイカ１の一面に厚さ０．０３ｍのガラスクロス２
を重ね、エポキシ樹脂３０重量％ メチルエチルケトン
溶液のワニスをガラスクロス側からロールコータにより
塗布し、乾燥させる。これにより樹脂３がマイカ層とガ
ラスクロスの界面及びガラスクロス内部に含まれる。つ
いで、集成マイカ層の他面に厚さ０．０３８ ｔｍのポ
リエステル不織布４を重ね、上記と同様のワニスをこの
不織布側からロールコータにより塗布し、つづいてその
未乾燥状態でメチルエチルケトンに浸漬した回転ロール
と抑えロールの間に通し、乾燥する。これにより不織布
内部に含浸された樹脂を溶出させ、樹脂３をマイカ層１
との界面に偏在させることができる。As shown in Fig. 1, a glass cloth 2 with a thickness of 0.03 m is placed on one side of a hard unfired laminated mica 1 with a thickness of 0.16 tm.
A varnish of 30% by weight epoxy resin and methyl ethyl ketone solution is applied from the glass cloth side using a roll coater and dried. As a result, the resin 3 is contained at the interface between the mica layer and the glass cloth and inside the glass cloth. Next, a polyester non-woven fabric 4 with a thickness of 0.038 tm was layered on the other side of the laminated mica layer, and the same varnish as above was applied from the non-woven fabric side using a roll coater, and then the undried state was immersed in methyl ethyl ketone. Pass it between a roll and a pressure roll to dry. As a result, the resin impregnated inside the nonwoven fabric is eluted, and the resin 3 is transferred to the mica layer 1.
It can be unevenly distributed at the interface with.
このようにして得られたドライマイカテープ原反は、厚
さ０．２４ｍであり、マイカ層、不織布、エポキシ樹脂
ワニスの全量を１００としたときのエポキシ樹脂含有量
はガラスクロス側が１５重量％、不織布側が６重量％で
あった。なお、不織布内部の樹脂を溶出させないときの
不織布側のエポキシ樹脂含有量は２２重量％であった。The raw dry mica tape thus obtained had a thickness of 0.24 m, and the epoxy resin content was 15% by weight on the glass cloth side, when the total amount of the mica layer, nonwoven fabric, and epoxy resin varnish was taken as 100. The nonwoven fabric side was 6% by weight. Note that the epoxy resin content on the nonwoven fabric side when the resin inside the nonwoven fabric was not eluted was 22% by weight.
比較例として第２図に示すように、厚さ０．１６ｍｍの
硬質無焼成集成マイカ１の片面に厚さ０．０３ｍのガラ
スクロス２を上記のガラスクロス側と同様のエポキシ樹
脂含有量で貼り合わせて厚さ０．２０ｔａのドライマイ
カテープ原反を作製した。As a comparative example, as shown in Fig. 2, a glass cloth 2 with a thickness of 0.03 m was attached to one side of a hard unfired laminated mica 1 with a thickness of 0.16 mm with the same epoxy resin content as the glass cloth side. In total, a dry mica tape original fabric having a thickness of 0.20 ta was produced.
上記の本実施例と比較例のドライマイカテープ原反につ
いて次の試験を行った。The following tests were conducted on the raw dry mica tapes of the present example and comparative example described above.
■ 含浸試験−１
試験片の下端が２０鶴浸漬するように、□容器７へひま
し油トルエン溶液８（粘度２６ ｍＰａ−５（２５℃
）を入れる。ひまし油トルエン溶液に浸漬した後の経過
時間毎の含浸高さを測定する。試験片は５本とし、その
平均値を含浸高さとし、測定結果を次の表に示す。■ Impregnation test-1 Castor oil toluene solution 8 (viscosity 26 mPa-5 (25°C
). The impregnation height is measured at each elapsed time after immersion in the castor oil toluene solution. Five test pieces were used, and the average value was taken as the impregnation height, and the measurement results are shown in the following table.
■ 含浸試験−２
上記の実施例、比較例のドライマイカテープ原反を３２
０幅に切断し、第４図に示すように厚さ５龍、幅２５ｍ
重、長さ５００ ｖｎａのアルミノマー９に１６龍重ね
（ハーフランプ＞ −ｅ”２ｏ回巻いてテープ巻回マイ
カ層１０を有する試験片を形成し、これを２５℃で粘度
１ボイズのエポキシ樹脂溶液からなる含浸ワニス中に入
れ、真空度Ｉ Ｔｏｒｒで５時間含浸させた。■ Impregnation test-2 The original dry mica tapes of the above examples and comparative examples were
Cut to 0 width, 5mm thick and 25m wide as shown in Figure 4.
A test piece having a tape-wrapped mica layer 10 was formed by wrapping 16 layers (half ramp > -e) 20 times around aluminomer 9 with a weight and length of 500 vna, and this was coated with an epoxy resin solution with a viscosity of 1 void at 25°C. The sample was placed in an impregnating varnish consisting of: and impregnated for 5 hours at a vacuum degree of I Torr.
これらの試験片の含浸に当たっては、ワニスが試験片端
部から含浸される影響を除くためにそれぞれの試験片の
端部をシリコーンシーラントｌｌで完全にシールした。When impregnating these test pieces, the ends of each test piece were completely sealed with silicone sealant 11 to eliminate the effect of varnish being impregnated from the ends of the test pieces.
上記のワニスを含浸させたそれぞれの試験片をワニスか
ら取り出し、１５０℃、１２時間加熱処理を行い、ワニ
スを硬化させた。Each test piece impregnated with the above varnish was taken out from the varnish and heat treated at 150° C. for 12 hours to harden the varnish.
硬化後の試験片を第４図鎖線のところで切断し、ワニス
の含浸状態を目視すると、片面ガラスクロス裏打ちの比
較例のドライマイカテープを使用したコイルは、表面か
ら１５層までワニスの含浸した跡が認められたが、ガラ
スクロス裏打ちとともに不織布を用いた本実施例のもの
は、表面からアルミバーまで４０層全層にワニスの含浸
跡が認められた。When the cured test piece was cut along the chain line in Figure 4 and the state of varnish impregnation was visually observed, the coil using the dry mica tape of the comparative example, which was lined with glass cloth on one side, showed traces of varnish impregnation up to 15 layers from the surface. However, in the case of this example in which a nonwoven fabric was used along with glass cloth lining, traces of varnish impregnation were observed in all 40 layers from the surface to the aluminum bar.
以上の結果から、含浸試験−１ではドライマイカテープ
の試験片そのものについては実施例、比較例に含浸性の
差はないが、含浸試験−２のドライマイカテープを重ね
巻した場合には実施例のものの含浸性が顕著に優れてい
ることがわかる。From the above results, it can be seen that in impregnation test-1, there is no difference in impregnability between the dry mica tape test piece itself between the example and the comparative example, but when the dry mica tape of impregnation test-2 is wrapped overlappingly, It can be seen that the impregnating property of the sample is significantly superior.
このように不織布を有するドライマイカテープの含浸性
が良い理由は、不織布がポーラスなためワニスが浸透し
易く、これを通路としてオーバシップされたテープ層の
内部にワニスが浸入するためであり、−度含浸されたワ
ニスは強（押圧されないかぎり流出せず、コイル内に保
持され、その保持性が良いためと考えられる。不織布単
体ではワニスの保有量はワニスと不織布の合計に対する
ワニスの量で９０％以上に及ぶことが他の実験で認めら
れた。The reason why the dry mica tape having a non-woven fabric has such good impregnating properties is that the non-woven fabric is porous, so the varnish easily penetrates, and the varnish penetrates into the overshipped tape layer using this as a passage. This is thought to be due to the fact that the varnish impregnated with water is strong (it does not flow out unless it is pressed and is retained within the coil and has good retention properties.The amount of varnish retained in the nonwoven fabric alone is 90% compared to the total of varnish and nonwoven fabric). % or more was observed in other experiments.
発明の効果
本発明によれば、マイカ層と含浸性シートを層状に設け
、含浸性シートと他の層との界面に樹脂を偏在させてこ
れらを接着させたので、例えばドライマイカテープをコ
イル本体に重ね巻きした場合には含浸性シートを通路と
してワニスが内側の巻回層に浸透することができ、その
際含浸性シートがポーラスであって含浸樹脂が少ないと
きは、ワニスの浸透が妨げられず、より効率良くワニス
が含浸され、その保持量も多くすることができる。Effects of the Invention According to the present invention, the mica layer and the impregnated sheet are provided in layers, and the resin is unevenly distributed at the interface between the impregnated sheet and other layers to adhere them. When wrapped in layers, the varnish can penetrate into the inner wound layer using the impregnated sheet as a passage, but in this case, if the impregnated sheet is porous and there is little impregnated resin, the penetration of the varnish is hindered. Therefore, the varnish can be impregnated more efficiently and the amount of varnish retained can be increased.
これによりボイドの発生を少なくし、コイルの絶縁破壊
電圧が規定以下になる不良の発生を少なくし、その品質
を向上し、製造能率を高めることができる。As a result, it is possible to reduce the occurrence of voids, reduce the occurrence of defects in which the dielectric breakdown voltage of the coil is less than the specified value, improve the quality, and increase manufacturing efficiency.
第１図は本発明の一実施例のドライマイカテープの断面
図、第２図は従来のドライマイカテープの断面図、第３
図は含浸試験装置を示す断面図、第４図は試験用コイル
の斜視図、第５図は電気子巻線の断面図である。
図中、１はマイカ層、２はガラスクロス、３は樹脂、４
は不織布である。
昭和６２年１２月２８日
第１図
第３図
第４図
第５図
手続補正書（−自発）
昭和６３年０１月２０日
特許庁長官 小 川 邦 夫 殿
昭和６２年１２月２８日付特許＠（１）２、発明の名称
ドライマイカ成形材料
３、補正をする者
事件との関係 特許出願人
東京都千代田区丸の内２丁目４番１号
株式会社 日本マイカ製作所
代表者横山精−朗
４、代理人 ■１０５
５、補正命令の日付 自発
６、補正により増加する発明の数 なし７、補正の対象
「明細書の発明の詳細な説明の欄」
８、補正の内容
（１）明細書第２頁第１９行に、
「つけられたてマイカ層」とあるを、
「つけられたマイカ層」と訂正する。
（２）明細書第１１頁第１９行ないし第１２頁第２行に
「 以上の結果から、・・・場合には」とあるを、
「 以上のように、含浸試験−１、含浸試験−２のいず
れにおいても比較例のものに比べ」と訂正する。
以上Fig. 1 is a sectional view of a dry mica tape according to an embodiment of the present invention, Fig. 2 is a sectional view of a conventional dry mica tape, and Fig. 3 is a sectional view of a conventional dry mica tape.
The figure is a sectional view showing the impregnation test apparatus, FIG. 4 is a perspective view of a test coil, and FIG. 5 is a sectional view of an armature winding. In the figure, 1 is mica layer, 2 is glass cloth, 3 is resin, 4
is a nonwoven fabric. December 28, 1985 Figure 1 Figure 3 Figure 4 Figure 5 Procedural amendment (- voluntary) January 20, 1988 Commissioner of the Patent Office Kunio Ogawa Patent dated December 28, 1988 @ (1) 2. Name of the invention: Dry mica molding material 3. Relationship with the person making the amendment: Patent applicant: 2-4-1 Marunouchi, Chiyoda-ku, Tokyo Japan Mica Manufacturing Co., Ltd. Representative: Sei-ro Yokoyama 4, Agent Person ■105 5. Date of amendment order Voluntary 6. Number of inventions to be increased by amendment None 7. Target of amendment "Column for detailed explanation of the invention in the specification" 8. Contents of amendment (1) Page 2 of the specification In line 19, the phrase ``freshly applied mica layer'' should be corrected to ``applied mica layer.'' (2) From page 11, line 19 to page 12, line 2 of the specification, the phrase ``Based on the above results, in the case'' has been replaced with ``As described above, impregnation test-1, impregnation test- 2, compared to the comparative example.''that's all
Claims (4)
を層状に接着して有する層状体において、含浸性シート
とこれに隣接する他の層とをこれらの界面に樹脂を偏在
させることにより接着させたことを特徴とするドライマ
イカ成形材料。(1) In a layered body in which a mica layer containing mica as a main component and an impregnated sheet are bonded together in a layered manner, the impregnated sheet and other adjacent layers are bonded by unevenly distributing resin at the interface between them. A dry mica molding material characterized by:
層の片面又は両面に貼り合わせることを特徴とする特許
請求の範囲第１項記載のドライマイカ成形材料。(2) The dry mica molding material according to claim 1, wherein the impregnated sheet is a nonwoven fabric, and this nonwoven fabric is bonded to one or both sides of the mica layer.
ートを順次貼り合わせて有することを特徴とする特許請
求の範囲第１項記載のドライマイカ成形材料。(3) The dry mica molding material according to claim 1, wherein the layered body has a glass fiber woven fabric, a mica layer, and an impregnated sheet laminated in sequence.
する特許請求の範囲第１項、第２項又は第３項記載のド
ライマイカ成形材料。(4) The dry mica molding material according to claim 1, 2 or 3, which is a dry mica tape for coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62330294A JP2696517B2 (en) | 1987-12-28 | 1987-12-28 | Dry mica molding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62330294A JP2696517B2 (en) | 1987-12-28 | 1987-12-28 | Dry mica molding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01175105A true JPH01175105A (en) | 1989-07-11 |
| JP2696517B2 JP2696517B2 (en) | 1998-01-14 |
Family
ID=18231040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62330294A Expired - Fee Related JP2696517B2 (en) | 1987-12-28 | 1987-12-28 | Dry mica molding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2696517B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1995948A2 (en) | 2007-05-23 | 2008-11-26 | Sony Corporation | Image processing |
| US8348282B2 (en) | 2008-06-04 | 2013-01-08 | Jtekt Corporation | Tool clamping device and tool clamping method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462100U (en) * | 1977-10-12 | 1979-05-01 | ||
| JPS5879820U (en) * | 1981-11-18 | 1983-05-30 | 株式会社日本理化工業所 | Mica tape for electrical insulation |
| JPS5935312A (en) * | 1982-08-21 | 1984-02-27 | 三菱電機株式会社 | Method of producing lumped mica sheet |
-
1987
- 1987-12-28 JP JP62330294A patent/JP2696517B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462100U (en) * | 1977-10-12 | 1979-05-01 | ||
| JPS5879820U (en) * | 1981-11-18 | 1983-05-30 | 株式会社日本理化工業所 | Mica tape for electrical insulation |
| JPS5935312A (en) * | 1982-08-21 | 1984-02-27 | 三菱電機株式会社 | Method of producing lumped mica sheet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1995948A2 (en) | 2007-05-23 | 2008-11-26 | Sony Corporation | Image processing |
| US8348282B2 (en) | 2008-06-04 | 2013-01-08 | Jtekt Corporation | Tool clamping device and tool clamping method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2696517B2 (en) | 1998-01-14 |
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