JPS638032Y2 - - Google Patents
Info
- Publication number
- JPS638032Y2 JPS638032Y2 JP1984042739U JP4273984U JPS638032Y2 JP S638032 Y2 JPS638032 Y2 JP S638032Y2 JP 1984042739 U JP1984042739 U JP 1984042739U JP 4273984 U JP4273984 U JP 4273984U JP S638032 Y2 JPS638032 Y2 JP S638032Y2
- Authority
- JP
- Japan
- Prior art keywords
- fire
- mica
- tape
- polyethylene
- attached
- 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
- 239000010445 mica Substances 0.000 claims description 37
- 229910052618 mica group Inorganic materials 0.000 claims description 37
- 230000009970 fire resistant effect Effects 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 claims description 20
- 229920000573 polyethylene Polymers 0.000 claims description 20
- 239000011888 foil Substances 0.000 claims description 18
- 239000003365 glass fiber Substances 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 6
- 239000013464 silicone adhesive Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 22
- 239000011521 glass Substances 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000002966 varnish Substances 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Description
この考案は耐火電線、特に各種消防用設備の起
動装置及びモーター、自動火災報知設備の受信
機、誘導灯非常口指示表示灯への回路配線などに
使用される耐火電線に係るものである。
近時建築物の高層化に伴ない、火災対策が重視
され、たとえ火災時の高熱雰囲気下に於ても、所
定の装置に安定した状態で電力を供給し得る耐火
電線が開発された。
その構造は導体の外部に耐火層と、ゴム又はプ
ラスチツク絶縁層を順次設けたものであるが、そ
の耐火層は鱗片状マイカを抄造してマイカテープ
とし、これを軟質又は硬質のガラスクロス上に接
着剤で固定したマイカ・ガラステープを導体上に
巻き付け或は縦添えして形成したものであるが、
マイカ鱗片は非常に薄く細かいものを使用する関
係上、燃焼雰囲気下では耐火層が粉状になつて脆
く導体から剥離し易い欠点があつた。
このため硬質または軟質の集成マイカを抄造し
た約100μ厚のマイカ箔と約30μ厚のガラスクロス
とをシリコンワニス系接着剤で貼り合せたものを
耐火層としてマイカ面を内側即ち導体側に向けて
巻いたものがあり、実績も多く信頼性もかなり高
いがコスト高である難点があつた。
又、更に最近では厚さ約100μの軟質の集成マ
イカ箔に延伸ポリエチレンフイルム、延伸ポリエ
ステルフイルムの如き延伸プラスチツクフイルム
をシリコンワニス系接着剤で貼り合せたものを耐
火層としてマイカ面を導体側に向けて巻いたもの
が提案されているが耐火試験時にマイカがはがれ
てしまい、そのため前記したマイカ・ガラスクロ
スを使用した場合に２枚でよかつたものがマイカ
延伸プラスチツク貼合テープでは３枚巻かねば耐
火層として充分でないことが判り、素材的には廉
価となるものの使用量からは逆にコスト高となる
という実情にある。
この考案は前述のような欠点を生じない新しい
耐火電線に係るもので、平行に配列されたガラス
繊維とポリエチレンフイルムとの複合テープの一
方の面にマイカ箔がシリコン系接着剤で貼着され
てなるマイカ・ポリエチレン・ガラス繊維複合テ
ープが、マイカ箔を内側にして導体の外部に巻き
付け又は縦添えして被覆された耐火層を設けたこ
とを特徴とする耐火電線で具体的にはマイカ箔の
貼着面がポリエチレン側にあり、その反対面に平
行に配列されたガラス繊維がシリコン系接着剤で
貼り付けられたテープおよびマイカ箔の貼着面が
平行に配列されたガラス繊維側であるテープをマ
イカ面を導体側にして使用するものである。この
ような耐火電線に於ては平行に配列されたガラス
繊維とポリエチレンの複合構造にマイカを貼付け
ているので、耐火性能をマイカ・ガラステープと
少しも変らず、ガラス繊維の織布テープを使用す
る場合に比べ製織工程が不要なため、コストが安
くなると共に、テープの可撓性は織布テープの場
合よりも優れ、織成による厚みの増加がないので
それ丈耐火層が薄くなり耐火層間のスキ間がせま
くなり耐火特性が良くなる。ひいてはケーブル外
径を少しでも小さくできる利益がある。
次にこの考案を図面により説明すれば、第１図
に見るように導体１上に耐火層２、プラスチツク
絶縁層３、プラスチツクシース４が設けられて耐
火電線を形成するが、耐火層２を形成する材料の
構造は第２図イに示すように平行に配列されたガ
ラス繊維５にポリエチレンフイルム７を接着しポ
リエチレンフイルム７の表面のうちガラス繊維５
と反対面にマイカ箔をシリコンワニス系接着剤で
貼着したものかあるいは第２図ロに示すように平
行に配列されたガラス繊維５にポリエチレンフイ
ルム７を接着し、ガラス繊維５の表面にシリコン
ワニス系接着剤でマイカ箔６を貼着したものが使
用される。
又、第２図、イ，ロに示されたような各テープ
はそれぞれ単独で必要枚数導体上に巻き付けて耐
火層を形成し得るが、複合させてもよい。
次にこの考案の実施例について述べる。
実施例
25μのポリエチレンフイルムの片面に、
ECD450−１／２４・4Sのガラスヤーンを間隔２mm
で平行に配列してシリコン接着剤で貼着し、この
ガラスヤーンの貼着面に、厚さ約0.1mmのマイカ
箔をシリコン接着剤で貼付けて得られたテープを
直径１mmの軟銅線の上に２枚巻き、その上に厚さ
0.8mm絶縁用ポリエチレン被覆層を設けて耐火線
心とし、これをジユート介在を用いて３心より合
せ、その上に厚さ1.5mmのビニルシースの押出被
覆層を設けてこの考案の耐火電線を得た。この耐
火電線の耐火特性は840℃×30minで、600V×
30minの耐圧試験に耐え、絶縁抵抗は2.5MΩ・
1.4min、消火後の耐圧1500V／1minに耐えるも
のであつた。
なお実施例に於て塩化ビニルシースをあげたが
難燃性ポリエチレンシースに代えることもでき
る。
比較例
厚さ0.1mmのマイカ箔を25μの延伸ポリエチレン
フイルムの片面に、シリコンワニスで接着して得
られたテープを、直径１mmの軟銅線上にマイカ面
を導体側にして１／５ラツプで２枚又は３枚重ね巻
きし、この上に0.8mmの絶縁用ポリエチレンを被
覆して耐火線心とし、これをポリプロピレン延伸
テープ介在を用いて３心より合わせ、ポリエステ
ル不織布の抑え巻テープを施した後、その上に厚
さ1.5mmのビニルシースの押出被覆層を設けて耐
火電線とした。この耐火電線の特性は下記のとお
りであつた。
This invention relates to fire-resistant electric wires, particularly fire-resistant electric wires used for circuit wiring to starters and motors of various firefighting equipment, receivers of automatic fire alarm equipment, guide lights, emergency exit indicator lights, etc. In recent years, as buildings have become taller, fire prevention measures have become more important, and fire-resistant electric wires have been developed that can stably supply power to designated equipment even in a high-temperature atmosphere during a fire. Its structure is one in which a fireproof layer and a rubber or plastic insulating layer are sequentially provided on the outside of the conductor.The fireproof layer is made of scaly mica and made into a mica tape, which is then placed on a soft or hard glass cloth. It is formed by wrapping mica/glass tape fixed with adhesive around a conductor or attaching it vertically.
Since the mica scales are very thin and fine, the refractory layer becomes powdery in a combustion atmosphere, becomes brittle, and easily peels off from the conductor. For this reason, a fireproof layer is made by laminating approximately 100μ thick mica foil made from hard or soft laminated mica and approximately 30μ thick glass cloth with a silicone varnish adhesive, with the mica surface facing inward, that is, toward the conductor. There is a rolled one, which has a good track record and is quite reliable, but it has the drawback of being expensive. Furthermore, more recently, a fireproof layer is created by laminating a stretched plastic film such as a stretched polyethylene film or a stretched polyester film to a soft laminated mica foil approximately 100μ thick with a silicone varnish adhesive, with the mica side facing the conductor side. However, the mica peeled off during the fire resistance test, and as a result, when using the mica/glass cloth mentioned above, it would have been necessary to wrap two layers, but with the mica stretched plastic adhesive tape, it would be necessary to wrap three layers. It has been found that this material is not sufficient as a fireproof layer, and although it is a low-cost material, it becomes expensive due to the amount used. This invention relates to a new fire-resistant electric wire that does not suffer from the above-mentioned drawbacks. Mica foil is attached to one side of a composite tape of glass fibers and polyethylene film arranged in parallel using a silicone adhesive. A fire-resistant electric wire characterized by a mica-polyethylene-glass fiber composite tape that is coated with a fire-resistant layer wrapped around the outside of the conductor with mica foil inside or attached vertically. Tape where the adhesive side is on the polyethylene side and glass fibers arranged in parallel on the opposite side are attached with silicone adhesive, and tape where the adhesive side of mica foil is on the glass fiber side arranged in parallel. is used with the mica side facing the conductor side. In such fire-resistant electric wires, mica is attached to a composite structure of glass fibers and polyethylene arranged in parallel, so the fire-resistant performance is the same as mica/glass tape, and woven glass fiber tape is used. Since there is no need for a weaving process compared to woven fabric tapes, the cost is lower, and the flexibility of the tape is better than that of woven fabric tapes.Since there is no increase in thickness due to weaving, the length of the fireproof layer becomes thinner and the thickness between the fireproof layers is reduced. The gaps between the two are narrower and the fire resistance properties are improved. Furthermore, there is an advantage that the outer diameter of the cable can be made as small as possible. Next, to explain this invention with reference to the drawings, as shown in FIG. The structure of the material is as shown in FIG.
Mica foil is pasted on the opposite side with a silicone varnish adhesive, or a polyethylene film 7 is adhered to glass fibers 5 arranged in parallel as shown in FIG. Mica foil 6 is attached using a varnish adhesive. Further, each of the tapes shown in FIGS. 2A and 2B may be individually wrapped around the conductor in a required number to form a fireproof layer, but they may also be combined. Next, an example of this invention will be described. Example: On one side of a 25μ polyethylene film,
ECD450-1/24/4S glass yarns are arranged in parallel at 2mm intervals and pasted with silicone adhesive, and mica foil with a thickness of about 0.1mm is pasted on the surface of the glass yarns with silicone adhesive. Wrap two pieces of the obtained tape on an annealed copper wire with a diameter of 1 mm, and then
A 0.8 mm insulating polyethylene coating layer was provided to form a fireproof wire core, three cores were twisted together using a jute interposition, and an extruded vinyl sheath coating layer with a thickness of 1.5 mm was provided on top of this to obtain the fireproof wire of this invention. Ta. The fire resistance properties of this fire resistant wire are 840℃×30min, 600V×
Withstands 30min withstand voltage test, insulation resistance is 2.5MΩ・
It was able to withstand a pressure resistance of 1500V/1min after extinguishing the fire for 1.4min. Although a vinyl chloride sheath is used in the embodiment, a flame-retardant polyethylene sheath may be used instead. Comparative example A tape obtained by adhering a mica foil with a thickness of 0.1 mm to one side of a 25μ stretched polyethylene film with silicone varnish is placed on an annealed copper wire with a diameter of 1 mm, with the mica side facing the conductor side, in 1/5 laps. After winding one or three layers in layers and covering this with 0.8 mm insulating polyethylene to make a fireproof wire core, three cores are twisted together using polypropylene stretched tape, and a polyester nonwoven tape is applied. On top of that, an extruded vinyl sheath coating layer with a thickness of 1.5 mm was provided to make a fire-resistant electric wire. The characteristics of this fireproof electric wire were as follows.
【表】
なお平行なガラス繊維にマイカ箔をつけたマイ
カガラステープのみを用いた場合、可撓性のポリ
エチレンを含む本考案より耐火性能も絶縁抵抗も
優れているもので、比較的仕上り外径の小さい電
線を得られる点では好ましいものと考えられる
が、平行なガラス繊維を並べただけでバツキング
材を含まないため、どうしてもヨコ（幅）方向の
力は弱く、引張強さは300ｇ／10mm幅程度で、バ
ツキング材のある本考案におけるマイカプラスチ
ツクテープの幅方向の引張強さ3.5Kg／10mm幅と
比べると格段の差異を有する。このことは同テー
プの保管中に層間剥離によるマイカのブロツキン
グ現象やテープの厚さの狂い、電線製造上テープ
の巻付速度の低下などから結局耐火電線のコスト
問題とともに細かな注意を払わないと性能も低下
するおそれのあるものである。
本考案はこれに対してポリエチレンをバツキン
グ材として用いたマイカ・ポリエチレン・ガラス
繊維複合テープからなる耐火層であるから、テー
プの保管中に層間剥離を生ぜず、テープの幅方向
の張力も大きいので、導体への巻付速度を向上し
得ることと、２枚巻でも十分耐火性能を発揮する
ことができ、コストも安い等各種の効果を奏する
ものである。
この考案は以上述べた通り、ポリエチレンフイ
ルムをバツキング材とし平行に配置されたガラス
ヤーンを使用し、これにマイカ箔をシリコンワニ
ス系接着剤で貼着してあることにより、火災遭遇
時にも充分耐える耐火層を有する耐火電線を得、
ガラスヤーンを使用した従来の耐火層にくらべて
可撓性に富み、細い導体の耐火電線をも容易に低
コストで提供するものである。[Table] When only mica glass tape, which is made by attaching mica foil to parallel glass fibers, is used, it has better fire resistance and insulation resistance than the present invention, which includes flexible polyethylene, and has a relatively smaller finished outer diameter. This is considered to be preferable in that it is possible to obtain electric wires with a small diameter, but since it is just a row of parallel glass fibers and does not contain a backing material, the force in the horizontal (width) direction is inevitably weak, and the tensile strength is 300 g/10 mm width. This is a significant difference compared to the tensile strength in the width direction of 3.5 kg/10 mm width of the mica plastic tape in the present invention with a backing material. This is due to the blocking phenomenon of the mica due to delamination during storage of the tape, the thickness of the tape becoming inconsistent, and the reduction in the winding speed of the tape during the manufacture of electric wires, which ultimately leads to the cost problem of fire-resistant electric wires and requires careful attention. Performance may also deteriorate. In contrast, the present invention uses a fireproof layer made of mica/polyethylene/glass fiber composite tape using polyethylene as the backing material, so it does not cause delamination during tape storage and has a large tension in the width direction of the tape. It has various effects such as being able to improve the winding speed around the conductor, exhibiting sufficient fireproof performance even with two layers of winding, and being inexpensive. As mentioned above, this idea uses polyethylene film as a backing material and glass yarns arranged in parallel, and mica foil is attached to this with a silicone varnish adhesive, making it durable even in the event of a fire. Obtain a fire-resistant electric wire having a fire-resistant layer,
It is more flexible than conventional fireproof layers using glass yarn, and can easily provide fireproof wires with thin conductors at low cost.
第１図はこの考案の耐火電線の一例を示す横断
面図、第２図はこの考案の耐火電線に用いられる
耐火層を形成するに用いられる耐火テープの構造
を示す横断面でイは平行に配列されたガラスヤー
ンにポリエチレンテープを貼合せ、ガラスヤーン
と反対面のポリエチレンにマイカ箔を貼合せた場
合、ロは平行に配列されたガラスヤーンにポリエ
チレンテープを貼合せ、ガラスヤーン面にマイカ
箔を貼合せた場合を示す。
１……導体、２……耐火層、３……絶縁層、４
……シース、５……ガラス繊維、６……マイカ
箔、７……ポリエチレンフイルム。
Figure 1 is a cross-sectional view showing an example of the fire-resistant electric wire of this invention, and Figure 2 is a cross-sectional view showing the structure of the fire-resistant tape used to form the fire-resistant layer used in the fire-resistant electric wire of this invention. If polyethylene tape is attached to the glass yarns arranged in an array, and mica foil is attached to the polyethylene on the opposite side of the glass yarns, then (b), polyethylene tape is attached to the glass yarns arranged in parallel, and mica foil is attached to the glass yarns. This shows the case of pasting together. 1... Conductor, 2... Fireproof layer, 3... Insulating layer, 4
... Sheath, 5 ... Glass fiber, 6 ... Mica foil, 7 ... Polyethylene film.
Claims (1)
フイルムとの複合テープの一方の面にマイカ箔
がシリコン系接着剤で貼着されてなるマイカ・
ポリエチレン・ガラス繊維複合テープが、マイ
カ箔を内側にして導体外部に巻き付け又は縦添
して被覆された耐火層を設けたことを特徴とす
る耐火電線。 (2) マイカ箔の貼着面がポリエリエチレン側であ
る実用新案登録請求の範囲第１項記載の耐火電
線。 (3) マイカ箔の貼着面がガラス繊維側である実用
新案登録請求の範囲第１項記載の耐火電線。[Claims for Utility Model Registration] (1) A mica film in which a mica foil is attached to one side of a composite tape of glass fibers and polyethylene film arranged in parallel using a silicone adhesive.
A fire-resistant electric wire characterized in that a fire-resistant layer is provided in which a polyethylene/glass fiber composite tape is wrapped around or vertically attached to the outside of a conductor with mica foil on the inside. (2) The fire-resistant electric wire according to claim 1, wherein the surface to which the mica foil is attached is the polyethylene ethylene side. (3) The fire-resistant electric wire according to claim 1, wherein the surface to which the mica foil is attached is the glass fiber side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4273984U JPS59161217U (en) | 1984-03-27 | 1984-03-27 | fireproof wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4273984U JPS59161217U (en) | 1984-03-27 | 1984-03-27 | fireproof wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59161217U JPS59161217U (en) | 1984-10-29 |
| JPS638032Y2 true JPS638032Y2 (en) | 1988-03-09 |
Family
ID=30173274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4273984U Granted JPS59161217U (en) | 1984-03-27 | 1984-03-27 | fireproof wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59161217U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437957U (en) * | 1977-08-19 | 1979-03-13 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4956475U (en) * | 1972-08-26 | 1974-05-18 |
-
1984
- 1984-03-27 JP JP4273984U patent/JPS59161217U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437957U (en) * | 1977-08-19 | 1979-03-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59161217U (en) | 1984-10-29 |
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