JPH046708A - Electrical insulating paper - Google Patents
Electrical insulating paperInfo
- Publication number
- JPH046708A JPH046708A JP10684090A JP10684090A JPH046708A JP H046708 A JPH046708 A JP H046708A JP 10684090 A JP10684090 A JP 10684090A JP 10684090 A JP10684090 A JP 10684090A JP H046708 A JPH046708 A JP H046708A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- pulp
- synthetic paper
- insulating paper
- weight
- 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
- 239000000835 fiber Substances 0.000 claims abstract description 24
- -1 polymetaphenylene isophthalamide Polymers 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract description 13
- 238000010030 laminating Methods 0.000 abstract description 2
- FVUKYCZRWSQGAS-UHFFFAOYSA-N 3-carbamoylbenzoic acid Chemical compound NC(=O)C1=CC=CC(C(O)=O)=C1 FVUKYCZRWSQGAS-UHFFFAOYSA-N 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 238000003475 lamination Methods 0.000 description 8
- 239000004760 aramid Substances 0.000 description 6
- 229920003235 aromatic polyamide Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000003490 calendering Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- QZUPTXGVPYNUIT-UHFFFAOYSA-N isophthalamide Chemical compound NC(=O)C1=CC=CC(C(N)=O)=C1 QZUPTXGVPYNUIT-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 238000012695 Interfacial polymerization Methods 0.000 description 2
- 229920000784 Nomex Polymers 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000004763 nomex Substances 0.000 description 2
- 239000013055 pulp slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
Landscapes
- Paper (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、変圧器あるいは高電圧ケーブル等の絶縁に用
いられる表面平滑性、耐熱性に優れた電気絶縁紙に関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electrically insulating paper with excellent surface smoothness and heat resistance used for insulating transformers, high voltage cables, etc.
〈従来技術〉
従来、変圧器用または高電圧ケーブル用絶縁紙等のよう
に、耐熱性、電気絶縁性、柔軟性〈コイル、ケーブル等
への巻き易さ〉が要求される分野では、各種フィルム及
び各種合成紙が使用されているが、柔軟性という観点よ
り特に電気絶縁紙がよく用いられている。なかでも、米
国デュポン社の芳香族ポリアミド１００％の合成Ｍ （
Ｎ ｏｍｅｘ ４７０■）が選もよく用いられている。<Prior art> Conventionally, various films and Various types of synthetic paper are used, but electrically insulating paper is particularly popular from the viewpoint of flexibility. Among them, 100% aromatic polyamide synthetic M (
Nomex 470■) is also often used.
このＮｏｎｅｘ ４１０■は特公昭３５−１１８５１号
公報、特公昭３６−１６４６０号公報及び特公昭３７−
５７３２号公報に２載の如き芳香族ポリアミドフィブリ
ッドと芳香族ポリアミド短繊維とを混抄後、熱圧カレン
ダー加工してなる耐熱性、電気絶縁性、柔軟性に優れた
電気絶縁紙である。This Nonex 410
This is an electrically insulating paper with excellent heat resistance, electrical insulation properties, and flexibility, which is obtained by mixing aromatic polyamide fibrids and aromatic polyamide short fibers as described in Japanese Patent No. 5732, and then subjecting the paper to hot-pressure calendering.
しかしながら、このＮ ｏｍｅｘ ４１０■は、比較的
、結晶の配向した芳香族ポリアミド短繊維を含んでおり
、この短繊維が、合成紙表面に千羽となって露出しやす
く、そのため変圧器及び高電圧ケーブル等に使用される
際、毛羽の部位に電界集中を引き起し放電が発生する。However, this Nomex 410■ contains aromatic polyamide short fibers with relatively oriented crystals, and these short fibers are easily exposed in the form of thousands on the surface of the synthetic paper, and are therefore used in transformers and high voltage cables. When used for such purposes, an electric field is concentrated in the fluff area, causing an electric discharge.
そこで、これを改良するために芳香族ポリアミドフィブ
リッドと結晶の配向性の低い芳香族ポリアミド短繊維と
を混抄後、熱圧カレンダー加工して表面平滑性を発現さ
せる技術が提案されている（実願平０１−５５０１５号
）、。Therefore, in order to improve this, a technology has been proposed in which aromatic polyamide fibrids and aromatic polyamide short fibers with low crystal orientation are mixed and then heat-pressure calendered to develop surface smoothness (in practice). Ganpei No. 01-55015).
方、前記摩擦後の発生毛羽を減少せしめる方策として、
ポリメタフエニレンイソフタルアミドパルプとポリバラ
フェニレンテレフタルアミドパルプとを混抄する技術が
提案されている（実願平０２−１２８９２ ＞。On the other hand, as a measure to reduce the fuzz generated after friction,
A technique has been proposed in which a polymetaphenylene isophthalamide pulp and a polyparaphenylene terephthalamide pulp are mixed (Utility Application No. 02-12892).
この考案は１合成紙表面の摩擦後の発生毛羽本数を１０
〜３０本／ ２５ｃｉ程度まで減少せしめる効果がある
が、１０本／ ２５ｃｉ程度は毛羽が発生する為、局部
放電による絶縁破壊の危険性が残されている。This idea reduces the number of fuzz generated after friction on the synthetic paper surface to 10.
Although it has the effect of reducing the number of fibers to about 30/25 ci, since fluff occurs at about 10/25 ci, there remains a risk of dielectric breakdown due to local discharge.
〈発明の目的〉
本発明の目的は、上記の如き耐熱電気絶縁紙の毛羽発生
の問題を解決することにある。<Object of the Invention> An object of the present invention is to solve the above-mentioned problem of fuzz generation in heat-resistant electrical insulating paper.
すなわち、耐熱性、電気絶縁性に優れ、表面が摩擦され
た場合にも毛羽発生が極めて少ない電気絶縁紙を提供す
ることにある。That is, the object of the present invention is to provide an electrically insulating paper that has excellent heat resistance and electrically insulating properties, and generates very little fuzz even when its surface is rubbed.
〈発明の構成〉
すなわち本発明は「ポリメタフェニレンイソフタルアミ
ドパルプ１００重量％からなる坪１１０ｇ。<Structure of the Invention> That is, the present invention is directed to "110 g of tsubo made of 100% by weight of polymetaphenylene isophthalamide pulp.
ボ以上の合成紙と、ポリメタフェニレンイソフタルアミ
ドパルプ１０〜８０重量％及びポリメタフェニレンイソ
フタルアミド短繊維９０〜２０重間％からなる合成紙と
を積層し、１８０℃以上で熱圧加工してなりＪＩＳ−Ｌ
−０８２３法による表面摩擦後の発生毛羽本数が１０本
／２５−以下であることを特徴とする電気絶縁紙」であ
る。Synthetic paper of 10 to 10% by weight and synthetic paper consisting of 10 to 80% by weight of polymetaphenylene isophthalamide pulp and 90 to 20% by weight of polymetaphenylene isophthalamide staple fibers are laminated together and processed under heat and pressure at 180°C or higher. Nari JIS-L
-An electrically insulating paper characterized in that the number of fluffs generated after surface friction by the 0823 method is 10/25 or less.
ポリメタフェニレンイソフタルアミドパルプは、公知の
例えば特公昭３５−１１８５１ｊＳ公報、特公昭３７５
７３２号公報に記載されているものであり、ポリメタフ
ェニレンイソフタルアミド短繊維の形態としては、単糸
繊度２０デニール以下、繊維長２０履以下のものが好ま
しい。Polymetaphenylene isophthalamide pulp is known in the art, for example, in Japanese Patent Publication No. 35-11851jS, Japanese Patent Publication No. 375-1986,
It is described in Japanese Patent No. 732, and the preferred form of the polymetaphenylene isophthalamide short fibers is one with a single yarn fineness of 20 deniers or less and a fiber length of 20 denier or less.
ポリメタフエニレンイソフタルアミドパルプ１００重量
％の合成紙は坪量１０９／ｒｒｔ以上である。A synthetic paper made of 100% by weight polymetaphenylene isophthalamide pulp has a basis weight of 109/rrt or more.
１０ｇ／Ｔｄ未満では、表面摩擦後に、ポリメタフエニ
レンイソフタルアミドパルプが剥離され、下層のポリメ
タフェニレンイソフタルアミド類ＬＩＭ［が毛羽立らの
原因となる。If it is less than 10 g/Td, the polymetaphenylene isophthalamide pulp is peeled off after surface friction, and the polymetaphenylene isophthalamide LIM [in the lower layer] causes fluffing.
また、ポリメタフエニレンイソフタルアミドパルプ及び
ポリメタフェニレンイソフタルアミド短繊維からなる下
層の合成紙は、ポリメタフエニレンイソフタルアミドパ
ルプの混率か１０−８０重量％である。ポリメタフエニ
レンイソフタルアミドパルプの混率が１０ｆｆｉ参％未
満では、下層側合成紙の強度が著しく低下しラミネート
不可能となり、８０重量％より多く混抄すると、引裂強
力が低下し、寸法安定性も小食で実用性を失う。In addition, the lower layer synthetic paper made of polymetaphenylene isophthalamide pulp and polymetaphenylene isophthalamide short fibers has a blending ratio of 10 to 80% by weight of polymetaphenylene isophthalamide pulp. If the blending ratio of polymetaphenylene isophthalamide pulp is less than 10% by weight, the strength of the lower synthetic paper will drop significantly, making lamination impossible. If it is mixed in more than 80% by weight, the tear strength will decrease and the dimensional stability will be poor. loses its practicality.
ラミネート方法は、湿紙性き合わせでも、カレンダーラ
ミネートでも平板プレス積層加工でもよく、湿紙性き合
わせの場合、その後１８０℃以上の温疫で熱圧加工する
。また、カレンダーラミネートの場合も、ラミネート条
件として、１８０℃以上の熱圧加■が必要である。熱圧
加工方法は、カレンダーロールによる加工でも平板プレ
ス加工でも良い。The lamination method may be wet paper lamination, calendar lamination, or flat plate press lamination. In the case of wet paper lamination, hot pressure processing is then carried out at a temperature of 180° C. or higher. In addition, in the case of calendar lamination, heat and pressure (1) at 180° C. or higher is required as the laminating condition. The hot pressure processing method may be processing using a calendar roll or flat plate press processing.
加工温度が１８０℃未満では、ポリメタフェニレンイソ
フタルアミドパルプ１ｏｏ重量％の上層と、ポリメタフ
エニレンイソフタルアミドパルプ及びポリメタフェニレ
ンイソフタルアミド短繊維よりなる下層との接着が不十
分となり、紙表面ＦＪＥＩ後に毛羽が多発する。If the processing temperature is less than 180°C, the adhesion between the upper layer of 10% by weight of polymethaphenylene isophthalamide pulp and the lower layer consisting of polymetaphenylene isophthalamide pulp and polymethaphenylene isophthalamide short fibers will be insufficient, and the paper surface FJEI Afterwards, a lot of fluff appears.
紙表面の摩擦方法及び摩擦後の発生毛羽本数は、下記の
方法により求めたものである。The method of rubbing the paper surface and the number of fuzz generated after rubbing were determined by the following method.
（紙表面の摩擦方法及び摩擦後の毛羽本数測定法）ＪＩ
Ｓ Ｌ−０８２３に従い、摩擦試験機■型［■大栄科
学精器製作所製］を用い、Ｗｌｌ鉢体金巾３号布、
５００ｇの荷重下で毎分６０回往復の速度でポリメタフ
エニレンイソフタルアミドパルプ１００重量％の上層の
合成紙面上を１００回摩擦する。(Paper surface friction method and fuzz count measurement method after friction) JI
According to S L-0823, using a friction tester type ■ [manufactured by Daiei Kagaku Seiki Seisakusho], Wll pot body gold cloth No. 3,
It is rubbed 100 times on the synthetic paper surface of the upper layer of 100% by weight polymethaphenylene isophthalamide pulp under a load of 500 g at a speed of 60 reciprocations per minute.
摩擦後の紙表面発生毛羽本数を２５ｃｉの面積で目視計
測した。同一の測定を５つのサンプルについて行い、そ
の平均値で示した。The number of fuzz generated on the paper surface after rubbing was visually measured in an area of 25 ci. The same measurement was performed on five samples and the average value is shown.
〈発明の効果〉
本発明の電気絶縁紙は、耐熱性、電気絶縁性に優れ、さ
らに表面摩擦後の発生毛羽が極めで少ない
従って、電稈集中、局部放電等の危険性が少ない。<Effects of the Invention> The electrically insulating paper of the present invention has excellent heat resistance and electrically insulating properties, and also generates very little fuzz after surface friction, so there is little risk of electrical culm concentration, localized discharge, etc.
用途としては、変圧器あるいは高電圧ケーゾル用の絶縁
紙のように耐熱性、電気絶縁性１表面平滑性が要求され
る用途に好適である。It is suitable for applications that require heat resistance, electrical insulation, and surface smoothness, such as insulating paper for transformers or high-voltage kasols.
？実施例〉
次に実施例により、本発明をさらに詳しく説明する。な
お、実施例において、摩擦後の毛羽本数以外の測定値は
、以下の方法で評価した。? Examples> Next, the present invention will be explained in more detail with reference to Examples. In addition, in the examples, measured values other than the number of fuzz after friction were evaluated by the following method.
（１） 坪量：ＪＩＳ−Ｐ−８１２４に従って測定し
た。(1) Basis weight: Measured according to JIS-P-8124.
（２）厚み：ＪＩＳ−Ｃ−２１１１に従って測定した。(2) Thickness: Measured according to JIS-C-2111.
（３） 絶縁破壊強度： Ｊ Ｉ ５−Ｃ−２１１１
に従って測定した。(3) Dielectric breakdown strength: J I 5-C-2111
Measured according to
（４） 熱収縮率：タテ １ＣｒＲヨコ１０．のサン
プルをタバイエスペック社製乾燥機（ＰＨ
Ｈ−１００型）を使用し、２５０°Ｃで１０分間処理を
した後のタテ、ヨコの
熱収縮率を次式にて計算した。そ
して、そのタテ、ヨコの平均値で
小した。(4) Heat shrinkage rate: vertical 1CrR horizontal 10. After processing the sample at 250°C for 10 minutes using a dryer manufactured by Tabai Espec Co., Ltd. (PH H-100 model), the vertical and horizontal thermal shrinkage rates were calculated using the following formula. Then, the average value of the vertical and horizontal values was reduced.
熱収縮率（％）−
（（ｉｏ −ｆｌ＋ ） ／ ４１！ｏ ） Ｘ １
００（注＞Ｑｎ：収縮前のサンプル長
ｆｌｌ ：収縮後のサンプル長
（５） 引裂強さ： Ｊ Ｉ ５−Ｐ−８１１３に従
って測定し、そのタテ、ヨコの平均値で示した。Heat shrinkage rate (%) - ((io -fl+) / 41!o) X 1
00 (Note>Qn: Sample length before shrinkage full: Sample length after shrinkage (5) Tear strength: Measured according to J I 5-P-8113, and expressed as the average value of the length and width.
実施例１〜５．比較例１〜５
混抄用ポリメタフエニレンイソフタルアミドパルプスラ
リーを以下の方法で製造した。Examples 1-5. Comparative Examples 1 to 5 Polymetaphenylene isophthalamide pulp slurry for mixed papermaking was produced by the following method.
まず、特公昭４７−１０８６３号公報に記載の界面重合
法によりポリメタフェニレンイソフタルアミドを製造し
た。このポリマーはＮ−メチル−２−ピロリドンに溶解
して測定した固有粘度（［、Ｖ、）が１．３５でありポ
リマー中に無機塩を全く含まない。このポリマーをＮ〜
メチル−２−ピロリドンにポリマー濃度１２．５重＄％
となるように溶解した。First, polymetaphenylene isophthalamide was produced by the interfacial polymerization method described in Japanese Patent Publication No. 47-10863. This polymer has an intrinsic viscosity ([,V,) of 1.35 measured when dissolved in N-methyl-2-pyrrolidone, and contains no inorganic salt at all. This polymer is N~
Polymer concentration 12.5% by weight in methyl-2-pyrrolidone
It was dissolved so that
−万Ｎ−メチルー２−ピロリドンに水を加えて水溶液（
濃度３０重量％）を作成し沈澱剤とした。- Add water to 10,000 N-methyl-2-pyrrolidone to make an aqueous solution (
(concentration 30% by weight) was prepared and used as a precipitant.
このポリマー溶液及び沈澱剤を、特開昭５２１５６２１
号公報の記載に従い、ポリマー溶液注入口。This polymer solution and precipitant were prepared in Japanese Patent Application Laid-Open No. 5215621.
Polymer solution inlet as described in the publication.
沈殿剤注入口及びスラリー排出口を有する掌と該室内に
とりつけらｒした［］−ターと、該室の内壁に固定され
たステーターとから成る沈ｌａ装置を用いて、各注入口
から注入し、前記ローターを高速回転させてバルブ化し
た。Using a sedimentation device consisting of a palm having a precipitant inlet and a slurry discharge port, a []-tar attached to the chamber, and a stator fixed to the inner wall of the chamber, the slurry is injected from each inlet. The rotor was rotated at high speed to form a valve.
得られたパルプを用い、パルパー、高速解離機。Using the obtained pulp, a pulper and a high-speed dissociator.
ディスクリフッイナーを使用してスラリー濃度０．３％
でカナデイアン標準濾水度１１０ａ＆の水性スラリーを
作成した。Slurry concentration 0.3% using disc refiner
An aqueous slurry having a Canadian standard freeness of 110a was prepared.
また混抄用ポリメタフェニレンイソフタルアミド短繊維
は、以下の方法で製造した。Further, polymetaphenylene isophthalamide short fibers for mixed papermaking were produced by the following method.
特開昭４７〜１０８６３号公報に記載の界面重合法によ
り製造された固有粘度［η１ １．４５のポリメタフェ
ニレンイソフタラミド重合体をＮ−メチル−２ごロリド
ンからなる溶媒に２０．５１署％の濃度で溶解して紡糸
ドープを調製し、この紡糸ドープを用いて特公昭４７−
１７５５１号公報に記載の湿式紡糸法に従って、孔径０
．０７ ｐｘｔｔｒの紡糸孔を１００００個設けた紡糸
口金から塩化カルシウム濃度４５％、温度９０℃の塩化
カルシウム水溶液からなる凝固浴中に紡糸した。A polymetaphenylene isophthalamide polymer having an intrinsic viscosity [η1 of 1.45, produced by the interfacial polymerization method described in JP-A No. 47-10863, was mixed with a solvent consisting of N-methyl-2 and lolidone at 20.51 viscosity. % concentration to prepare a spinning dope, and using this spinning dope,
According to the wet spinning method described in Publication No. 17551, the pore size is 0.
．． The fibers were spun from a spinneret with 10,000 spinning holes of 0.07 pxttr into a coagulation bath consisting of an aqueous calcium chloride solution with a calcium chloride concentration of 45% and a temperature of 90°C.
凝固した未延伸繊維は、凝固浴から引出された段階で４
５重量％の溶媒を含んでいた。The coagulated undrawn fibers have a temperature of 4 when pulled out from the coagulation bath.
It contained 5% by weight of solvent.
未延伸繊維を６０℃の温水浴で水洗して、溶媒含有率を
８重量％まで低下せしめた後、９４℃の温水浴中で２．
４倍に延伸し、１３０℃で乾燥後３５０℃の熱板上で
１．７５倍に延伸し、抄紙用繊維を得た。The undrawn fibers were washed with water in a 60°C hot water bath to reduce the solvent content to 8% by weight, and then 2.
Stretched 4 times, dried at 130°C, then placed on a hot plate at 350°C.
It was stretched 1.75 times to obtain papermaking fibers.
さらに、これを長さ６層に切断し、単糸繊度２デニール
、繊維長６ｍの抄紙用ポリメタフェニレンイソフタルア
ミド短繊維を得た。Furthermore, this was cut into 6 layers to obtain polymetaphenylene isophthalamide staple fibers for paper making having a single fiber fineness of 2 deniers and a fiber length of 6 m.
次いで前記パルプスラリー及び短繊維を、第１表の如き
混率で、上層、下層のシートを各々丸網２バット抄紙機
にて抄き合わせた。Next, the above-mentioned pulp slurry and short fibers were combined into upper and lower sheets using a circular mesh 2-vat paper machine at a mixing ratio as shown in Table 1.
その後、第１表の如き温度で圧力２００Ｋｇ、／αの条
件で、カレンダー加工した。Thereafter, it was calendered at a temperature and a pressure of 200 kg/α as shown in Table 1.
得られた物性を第１表に示す。The obtained physical properties are shown in Table 1.
第１表に示す如く、実施例１は、摩擦後の発生も毛羽が
なく、極めて優れた性能であった。As shown in Table 1, Example 1 had extremely excellent performance, with no fuzz occurring after friction.
また、実施例２〜５についでも、第１表に示す如く良好
なものであった。Further, Examples 2 to 5 were also good as shown in Table 1.
比較例１は、上層に短ｍ維を混抄しているため、第１表
に示す如く摩擦後の毛羽が多発し不良であった。In Comparative Example 1, short m fibers were mixed in the upper layer, so as shown in Table 1, there was a lot of fuzz after friction, which was poor.
比較例２は、上層の坪量が低いため、摩擦後に上層バル
ブ部分が剥離され、下層の混抄短繊維が毛羽となって多
発し、不良であった。In Comparative Example 2, since the basis weight of the upper layer was low, the upper layer valve part was peeled off after friction, and the mixed short fibers of the lower layer became fluffy and were defective.
比較例３は、下層のパルプ混率が低いため、下層シート
の強力不足でラミネートが不可能であった。In Comparative Example 3, since the pulp mixing ratio of the lower layer was low, the strength of the lower layer sheet was insufficient and lamination was impossible.
比較例４は、下層のパルプ混率が高いため、引裂強さが
低く、寸法安定性も不良であった。Comparative Example 4 had low tear strength and poor dimensional stability due to the high content of pulp in the lower layer.
比較例５は、カレンダー温度が低いため、上層と下層と
の接着が不十分となり、摩擦後に上層バルブ部分が剥離
され下層の混抄短繊維が毛羽となって多発し不良であっ
た。In Comparative Example 5, due to the low calendering temperature, the adhesion between the upper layer and the lower layer was insufficient, the upper layer bulb part was peeled off after friction, and the mixed short fibers in the lower layer became fuzzed and were defective.
Claims (1)
量％からなる坪量１０ｇ／ｍ＾２以上の合成紙とポリメ
タフエニレンイソフタルアミドパルプ１０〜８０重量％
及びポリメタフェニレンイソフタルアミド短繊維９０〜
２０重量％からなる合成紙とを積層し１８０℃以上で熱
圧加工してなり表面摩擦後の発生毛羽本数が１０本／２
５ｃｍ＾２以下であることを特徴とする電気絶縁紙。Synthetic paper with a basis weight of 10 g/m^2 or more consisting of 100% by weight of polymetaphenylene isophthalamide pulp and 10 to 80% by weight of polymetaphenylene isophthalamide pulp
and polymetaphenylene isophthalamide short fibers 90~
Synthetic paper consisting of 20% by weight is laminated and processed under heat and pressure at 180℃ or higher, and the number of fuzz generated after surface friction is 10/2
An electrically insulating paper characterized by having a thickness of 5 cm^2 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10684090A JP2641314B2 (en) | 1990-04-23 | 1990-04-23 | Electrical insulating paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10684090A JP2641314B2 (en) | 1990-04-23 | 1990-04-23 | Electrical insulating paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046708A true JPH046708A (en) | 1992-01-10 |
| JP2641314B2 JP2641314B2 (en) | 1997-08-13 |
Family
ID=14443889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10684090A Expired - Lifetime JP2641314B2 (en) | 1990-04-23 | 1990-04-23 | Electrical insulating paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2641314B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320892A (en) * | 1993-02-22 | 1994-06-14 | E. I. Du Pont De Nemours And Company | Tough layered papers with improved surface adhesion |
| JPH08506553A (en) * | 1993-12-06 | 1996-07-16 | カエゼル，シャルル | Refillable aerosol can with air as high pressure gas |
| US5622775A (en) * | 1993-08-24 | 1997-04-22 | E. I. Du Pont De Nemours And Company | Layered smooth surface aramid papers of high strength and printability |
| US5783039A (en) * | 1996-02-19 | 1998-07-21 | Teijin Limited | Wholly aromatic polyamide fiber sheet |
| US6319605B1 (en) | 1997-06-10 | 2001-11-20 | Teijin Limited | Heat-resistant fiber paper |
| US6407017B1 (en) | 1998-10-15 | 2002-06-18 | Teijin Limited | Wholly aromatic polyamide fiber synthetic paper sheet |
| US6558512B2 (en) | 1998-11-18 | 2003-05-06 | Oji Paper Co., Ltd. | Base material for laminate and process for producing the same |
| US6838401B1 (en) | 2000-08-04 | 2005-01-04 | Teijin Limited | Heat-resistant fibrous paper |
| JP2016031926A (en) * | 2014-07-25 | 2016-03-07 | 海鴻電気有限公司 | Impregnation process for insulation paper |
-
1990
- 1990-04-23 JP JP10684090A patent/JP2641314B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320892A (en) * | 1993-02-22 | 1994-06-14 | E. I. Du Pont De Nemours And Company | Tough layered papers with improved surface adhesion |
| US5622775A (en) * | 1993-08-24 | 1997-04-22 | E. I. Du Pont De Nemours And Company | Layered smooth surface aramid papers of high strength and printability |
| JPH08506553A (en) * | 1993-12-06 | 1996-07-16 | カエゼル，シャルル | Refillable aerosol can with air as high pressure gas |
| US5783039A (en) * | 1996-02-19 | 1998-07-21 | Teijin Limited | Wholly aromatic polyamide fiber sheet |
| US6319605B1 (en) | 1997-06-10 | 2001-11-20 | Teijin Limited | Heat-resistant fiber paper |
| US6407017B1 (en) | 1998-10-15 | 2002-06-18 | Teijin Limited | Wholly aromatic polyamide fiber synthetic paper sheet |
| US6558512B2 (en) | 1998-11-18 | 2003-05-06 | Oji Paper Co., Ltd. | Base material for laminate and process for producing the same |
| US6838401B1 (en) | 2000-08-04 | 2005-01-04 | Teijin Limited | Heat-resistant fibrous paper |
| JP2016031926A (en) * | 2014-07-25 | 2016-03-07 | 海鴻電気有限公司 | Impregnation process for insulation paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2641314B2 (en) | 1997-08-13 |
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