JPH09308043A - Non-buried cable protecting member - Google Patents

Non-buried cable protecting member

Info

Publication number
JPH09308043A
JPH09308043A JP8113349A JP11334996A JPH09308043A JP H09308043 A JPH09308043 A JP H09308043A JP 8113349 A JP8113349 A JP 8113349A JP 11334996 A JP11334996 A JP 11334996A JP H09308043 A JPH09308043 A JP H09308043A
Authority
JP
Japan
Prior art keywords
fiber
protective material
flame
phenolic resin
cable
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.)
Pending
Application number
JP8113349A
Other languages
Japanese (ja)
Inventor
Takashi Hashiba
喬 橋場
Takeshi Ishii
毅 石井
Masanori Sudo
正典 須藤
Takaaki Koide
高顕 小出
Takeshi Makiyo
武 真清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Highpolymer Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Highpolymer Co Ltd filed Critical Showa Highpolymer Co Ltd
Priority to JP8113349A priority Critical patent/JPH09308043A/en
Publication of JPH09308043A publication Critical patent/JPH09308043A/en
Pending legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
  • Details Of Indoor Wiring (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a non-buried cable protecting member which is suitable for a cable installed on a bridge, in a tunnel, etc., by a method wherein the protecting member is made of fiber-reinforced phenolic resin. SOLUTION: A protecting member 2 is molded with fiber-reinforced phenolic resin which has a specific gravity not larger than 2, a bending strength not smaller than 8kgf/mm<2> and a flame retardancy grade 2 or higher tested by a flame retardancy test and contains 10-80wt.% of glass fiber as reinforcing fiber material. The shape of the protecting member may be a plate-shape, an approximately U cross-sectional shape, etc., and protective pipes 1 in which cables are housed are installed by a suitable method. With this constitution, a protecting member 2 which is light in weight and easy to work, has a small moisture absorption rate, excellent strength, excellent heat-resistant property, excellent flame-resistant property, low smoking property, excellent weather- resistant property, excellent salt poisonous resistant property, etc., and, particularly, is suitable for protecting a non-buried cable which is installed on a bridge and in a tunnel from a flame, etc., can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は非埋設ケーブル用保
護材に関し、さらに詳しくは、橋梁やトンネル内などに
敷設された非埋設ケーブルを火災などから保護するため
の保護材であって、軽量で強度が大きく、施工性がよい
上、吸水率が小さく、耐熱性,耐燃性,低発煙性,耐侯
性,耐塩害性などに優れるとともに、非磁性を示す保護
材に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective material for non-embedded cables, and more particularly to a protective material for protecting non-embedded cables laid in bridges, tunnels, etc. from fire and the like. The present invention relates to a protective material having high strength, good workability, low water absorption rate, excellent heat resistance, flame resistance, low smoke generation property, weather resistance, salt damage resistance, and the like, and which is non-magnetic.

【0002】[0002]

【従来の技術】電線,電話線あるいは光ケーブルなどの
各種ケーブルは、数本あるいは数十本まとめてポリ塩化
ビニル樹脂や繊維強化ポリエステル樹脂などの保護管で
被覆し、これを敷設しているが、敷設する形態によって
地中等に埋設された埋設ケーブルと、橋梁やトンネル内
などに敷設された非埋設ケーブルとに大別することがで
きる。埋設ケーブルについては不審火などによる火災の
問題はないが、非埋設ケーブルについては、最近、不審
火等による火災などの不測の事故が頻発しており、この
ような火災からケーブル(保護管で被覆されたケーブ
ル)を保護する必要性が高まっている。
2. Description of the Related Art Various cables such as electric wires, telephone wires, and optical cables are covered by a protective tube made of polyvinyl chloride resin, fiber reinforced polyester resin or the like, which is laid. Depending on the form of laying, it can be roughly classified into a buried cable buried in the ground or the like and a non-buried cable laid in a bridge or tunnel. There is no problem of fire due to suspicious fire for buried cables, but unexpected accidents such as fire due to suspicious fire have recently occurred frequently for non-buried cables. There is an increasing need to protect the cable that has been used.

【0003】このような非埋設ケーブル用保護材に対し
て要求される性能としては、例えば(1)軽量で施工性
(取付け時の作業性)がよく、かつ吸水率が小さいこ
と、(2)耐熱性及び耐燃性に優れ、かつ低発煙性であ
り、燃焼ガスの毒性が低いこと、(3)強度,耐侯性,
耐塩害性などに優れること、(4)送電ロスを少なくす
るために、非磁性であることなどを挙げることができ
る。
The performance required for such a non-buried cable protection material is, for example, (1) light weight, good workability (workability at the time of installation), and low water absorption rate, (2) Excellent heat resistance and flame resistance, low smoke generation, low toxicity of combustion gas, (3) strength, weather resistance,
It is excellent in salt damage resistance, and (4) non-magnetic in order to reduce power transmission loss.

【0004】これまでのところ、このような非埋設ケー
ブルを保護することは、あまり行われていなかったが、
わずかに行われている例を見ると、非埋設ケーブル用保
護材として、繊維強化コンクリート板(GRC板),ケ
イ酸カルシウム−レジン板(ケイカル板)又はレジンコ
ンクリート板,鉄板,繊維強化ポリエステル樹脂板(ポ
リエステルFRP板)などが用いられている。しかしな
がら、これらの保護材は、いずれも上記要求性能すべて
を満たしておらず、なんらかの欠点を有し、充分に満足
しうるものとはいえない。
Up until now, protection of such non-buried cables has been less common,
Looking at the few examples, fiber-reinforced concrete plates (GRC plates), calcium silicate-resin plates (silica plates) or resin concrete plates, iron plates, fiber-reinforced polyester resin plates were used as protective materials for non-embedded cables. (Polyester FRP plate) or the like is used. However, none of these protective materials satisfy all of the above-mentioned required performances, have some drawbacks, and cannot be said to be sufficiently satisfactory.

【0005】例えば、GRC板及びレジンコンクリート
板においては、耐燃性は良好であるものの、高温になる
とその中に含まれている水分の影響で爆裂現象が生じ、
形状破壊を起こすおそれがある上、曲げ強度や衝撃強度
も充分ではなく、しかも重量が大きくて施工性が悪いな
どの欠点を有している。また、GRC板は吸水率が比較
的大きいという欠点がある。さらに、ケイカル板は耐燃
性については良好であるが、吸水率が大きく、曲げ強度
や衝撃強度が低いという欠点を有し、一方、鉄板におい
ては、耐熱性,耐燃性及び強度は充分であるが、耐食
性,断熱性に劣り、かつ温度の変化により歪が生じやす
く、しかも磁性体であるため、送電ロスをもたらすなど
の欠点がある。また、ある程度厚みがないとたわみが発
生しやすく、したがって、その分重量が大きくなるとと
もに施工性が悪くなる。
For example, in the case of GRC board and resin concrete board, although the flame resistance is good, the explosion phenomenon occurs at high temperature due to the effect of moisture contained in the board.
In addition to the possibility of causing shape breakage, it also has drawbacks such as insufficient bending strength and impact strength, poor weight and poor workability. Further, the GRC plate has a drawback that the water absorption rate is relatively large. Furthermore, although the calcareous plate has good flame resistance, it has the drawbacks of high water absorption and low bending strength and impact strength. On the other hand, the iron plate has sufficient heat resistance, flame resistance and strength. However, it is inferior in corrosion resistance and heat insulation, and is liable to be distorted due to a change in temperature, and since it is a magnetic material, it has a drawback that it causes power transmission loss. In addition, if there is no thickness to some extent, bending is likely to occur, and accordingly, the weight becomes heavier and the workability becomes worse.

【0006】さらに、ポリエステルFRP板は、軽量
で、かつ成形が容易で施工性も良く、しかも非磁性で強
度も充分であるなどの長所を有しているが、耐熱性,耐
燃性及び低発煙性に劣り、火災などから護るための保護
材としては必ずしも適していない。他方、近年、繊維強
化フェノール樹脂(フェノール樹脂FRPということが
ある)が開発され、その優れた軽量性,耐水性(吸水率
が小さい),耐燃性,耐熱性,強度などを生かして、航
空機の内装材をはじめ、建築分野,電気分野,輸送分
野,航空・宇宙分野などで使用され始めている。
Further, the polyester FRP plate has advantages such as light weight, easy molding, good workability, non-magnetic property and sufficient strength, but heat resistance, flame resistance and low smoke generation. It is inferior in properties and is not necessarily suitable as a protective material for protecting from fire. On the other hand, in recent years, a fiber-reinforced phenolic resin (sometimes called phenolic resin FRP) has been developed, and by taking advantage of its excellent lightness, water resistance (small water absorption rate), flame resistance, heat resistance, strength, etc. It is beginning to be used in interior materials, construction fields, electrical fields, transportation fields, aviation and space fields, etc.

【0007】[0007]

【発明が解決しようとする課題】本発明は、このような
従来の非埋設ケーブル用保護材がもつ欠点を克服し、非
埋設ケーブル用保護材としての前記要求性能をバランス
よく満足しうる保護材を提供することを目的とするもの
である。
SUMMARY OF THE INVENTION The present invention overcomes the drawbacks of the conventional protective material for non-embedded cable and can satisfy the above-mentioned required performance as a protective material for non-embedded cable in a well-balanced manner. It is intended to provide.

【0008】[0008]

【課題を解決するための手段】本発明者らは、非埋設ケ
ーブル用保護材としての前記要求性能をバランスよく満
たす材料について鋭意研究を重ねた結果、繊維強化フェ
ノール樹脂がその目的に適合しうることを見出した。本
発明は、かかる知見に基づいて完成したものである。す
なわち、本発明は、繊維強化フェノール樹脂からなる非
埋設ケーブル用保護材、特に橋梁又はトンネル(海底ト
ンネルを含む)内に敷設された非埋設ケーブル用保護材
を提供するものである。
DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies as to a material satisfying the above-mentioned required performance in a well-balanced manner as a protective material for non-embedded cables, and as a result, a fiber-reinforced phenol resin can meet the purpose. I found that. The present invention has been completed based on such findings. That is, the present invention provides a protective material for a non-embedded cable made of a fiber reinforced phenolic resin, particularly a protective material for a non-embedded cable laid in a bridge or a tunnel (including a submarine tunnel).

【0009】[0009]

【発明の実施の形態】本発明の保護材は繊維強化フェノ
ール樹脂からなるものであって、この繊維強化フェノー
ル樹脂は、以下に示す性状を有することが肝要である。
まず、比重は2以下が有利である。この比重が2を超え
ると保護材が重くなり、取り付け時の作業性が悪くな
る。本発明で用いる繊維強化フェノール樹脂の比重は、
通常1.4〜1.9の範囲である。なお従来保護材に使用さ
れている各材料の比重は、一般にGRC板:約2.2,ケ
イカル板:約1.2,鉄板:約7.8,ポリエステルFRP
板:約1.8である。
BEST MODE FOR CARRYING OUT THE INVENTION The protective material of the present invention comprises a fiber-reinforced phenolic resin, and it is important that the fiber-reinforced phenolic resin has the following properties.
First, it is advantageous that the specific gravity is 2 or less. If the specific gravity exceeds 2, the protective material becomes heavy and the workability at the time of mounting deteriorates. The specific gravity of the fiber-reinforced phenolic resin used in the present invention is
It is usually in the range of 1.4 to 1.9. The specific gravity of each material used for the conventional protective material is generally GRC plate: about 2.2, silica sheet: about 1.2, iron plate: about 7.8, polyester FRP.
Board: It is about 1.8.

【0010】次にJIS K−7055による曲げ試験
において、曲げ強度が8kgf/mm2 以上であるのが
よい。この曲げ強度が8kgf/mm2 未満では、保護
材は曲げに対する機械的強度が不充分であって、破損し
やすくなる。本発明で用いる繊維強化フェノール樹脂の
該曲げ強度は、通常8〜50kgf/mm2 の範囲であ
る。なお、従来保護材に用いられているGRC板の曲げ
強度は、4〜5kgf/mm2 程度、ケイカル板の曲げ
強度は、2〜3kgf/mm2 程度である。
Next, in a bending test according to JIS K-7055, it is preferable that the bending strength is 8 kgf / mm 2 or more. When the bending strength is less than 8 kgf / mm 2 , the protective material has insufficient mechanical strength against bending and is easily broken. The bending strength of the fiber-reinforced phenolic resin used in the present invention is usually in the range of 8 to 50 kgf / mm 2 . The bending strength of the GRC plate used as a conventional protective material is about 4 to 5 kgf / mm 2 , and the bending strength of the silica sheet is about 2 to 3 kgf / mm 2 .

【0011】さらに、JIS A−1321による難燃
性試験において、難燃二級以上であることが肝要であ
る。難燃性がこの難燃二級より悪いと、保護材は耐燃性
に劣り、かつ燃えた場合に発煙量が多く、特にトンネル
内などにおいては、重大な事故を引き起こすおそれがあ
り、火災などから護る保護材として適さない。本発明で
用いる繊維強化フェノール樹脂は、難燃二級以上であ
り、燃えた場合に発煙量が少なく、しかもその煙の色は
淡い白色をしており、かつ人体に対してほとんど害がな
いなどの特徴を有している。
Further, in the flame retardancy test according to JIS A-1321, it is important that the flame retardancy is second or higher. If the flame retardancy is lower than this flame retardant second class, the protective material is inferior in flame resistance and produces a large amount of smoke when burned, which may cause a serious accident, especially in a tunnel, etc. Not suitable as a protective material to protect. The fiber-reinforced phenolic resin used in the present invention is flame-retardant second-grade or higher, emits a small amount of smoke when burned, and the color of the smoke is pale white, and there is almost no harm to the human body. It has the characteristics of

【0012】これに対し、ポリエステルFRPは難燃三
級であり、かつ燃えた場合に黒色の煙を発生する。な
お、難燃二級の場合、発煙係数(CA)は60以下であ
るが、本発明で用いる繊維強化フェノール樹脂の場合、
この発煙係数(CA)は、通常5〜30の範囲である。
On the other hand, polyester FRP is a flame-retardant third grade and produces black smoke when burned. In the case of the second-class flame retardant, the smoke emission coefficient (CA) is 60 or less, but in the case of the fiber-reinforced phenol resin used in the present invention,
This smoke emission coefficient (CA) is usually in the range of 5-30.

【0013】このように、本発明の保護材に使用する繊
維強化フェノール樹脂は軽量で、曲げ強度が大きく、か
つ耐燃性及び低発煙性に優れているが、さらに耐水性,
耐熱性,耐候性,耐塩害性,耐衝撃性,加工性などにも
優れている。例えば、耐熱性については、該繊維強化フ
ェノール樹脂の150℃における曲げ強度は、常温にお
ける曲げ強度の80〜90%程度と大きい(つまり、高
温下での曲げ強度の低下が少ない)。これに対し、ポリ
エステルFRPのそれは、通常10〜20%程度であ
り、耐熱性、特に耐熱強度に難点がある。
As described above, the fiber-reinforced phenolic resin used in the protective material of the present invention is lightweight, has a large bending strength, and is excellent in flame resistance and low smoke emission, but it is
It also has excellent heat resistance, weather resistance, salt damage resistance, impact resistance, and workability. For example, with respect to heat resistance, the bending strength of the fiber-reinforced phenolic resin at 150 ° C. is as large as about 80 to 90% of the bending strength at room temperature (that is, the bending strength at high temperature is less likely to decrease). On the other hand, that of polyester FRP is usually about 10 to 20%, and there is a problem in heat resistance, especially in heat resistance.

【0014】また、耐候性については、該繊維強化フェ
ノール樹脂を、例えば、スガ試験機,デューサイクルウ
ェザーメーターWE−SUN,DC型のウェザーメータ
ーを用いて、60分照射×相対湿度50%,60分消灯
×相対湿度100%,ブラックパネル温度63℃の条件
で促進耐候試験を行い、120時間曝露した場合、その
曲げ強度は、テスト前の曲げ強度の85%以上であり、
極めて耐候性に優れている。さらに、この繊維強化フェ
ノール樹脂は、非磁性体であるので、保護材として用い
た場合、鉄板からなる保護材のように磁気を帯びること
なく、したがって磁気による送電ロスを引き起こすこと
がない。
Regarding the weather resistance, the fiber-reinforced phenolic resin is irradiated with 60 minutes irradiation × 50% relative humidity, using a Suga tester, a dew cycle weather meter WE-SUN, and a DC type weather meter. When the accelerated weathering test is performed under the condition of minute light-off x relative humidity 100% and black panel temperature 63 ° C and exposed for 120 hours, the bending strength is 85% or more of the bending strength before the test,
Excellent weather resistance. Furthermore, since this fiber-reinforced phenolic resin is a non-magnetic material, when it is used as a protective material, it does not become magnetized like a protective material made of an iron plate, and therefore does not cause power transmission loss due to magnetism.

【0015】本発明で用いられる繊維強化フェノール樹
脂における繊維補強材としては、特に制限はなく、様々
なものが挙げられる。例えば、ガラス繊維,炭素繊維,
ボロン繊維、さらには炭化珪素繊維やアルミナ繊維など
のセラミックス繊維、アスベストなどが挙げられ、これ
らは一種で用いてもよく、二種以上組み合わせて用いて
もよいが、得られる繊維強化フェノール樹脂の機械的物
性及び経済性などの点から、特にガラス繊維が好適であ
る。この繊維補強材の形態についても特に制限はなく、
例えばロービング,チョップドストランド,ミルドファ
イバー,クロス,コンテニュアスマット,ウィスカーな
どが挙げられる。また形態の異なる繊維補強材を二種以
上組み合わせて用いてもよい。
The fiber reinforcing material in the fiber reinforced phenolic resin used in the present invention is not particularly limited and various materials can be used. For example, glass fiber, carbon fiber,
Examples include boron fibers, ceramic fibers such as silicon carbide fibers and alumina fibers, and asbestos. These may be used alone or in combination of two or more. From the viewpoint of physical properties and economical efficiency, glass fiber is particularly preferable. There is also no particular limitation on the form of this fiber reinforcement,
For example, roving, chopped strand, milled fiber, cloth, continuous mat, whisker and the like can be mentioned. Further, two or more kinds of fiber reinforcing materials having different forms may be used in combination.

【0016】さらに、上記繊維補強材は、フェノール樹
脂との接着性を良くする目的で、所望により表面処理剤
で表面処理したものを用いてもよい。この表面処理剤と
しては、例えば、アミノシラン系,エポキシシラン系,
ビニルシラン系,アクリルシラン系等のシラン系、チタ
ネート系、アルミニウム系、クロム系、ジルコニウム
系、ホウ素系のカップリング剤などが挙げられる。これ
らの中では、シラン系カップリング剤及びチタネート系
カップリング剤が好適である。
Further, the fiber reinforcing material may be surface-treated with a surface-treating agent, if desired, for the purpose of improving the adhesiveness with the phenol resin. Examples of the surface treatment agent include aminosilane-based, epoxysilane-based,
Examples include silane-based coupling agents such as vinylsilane-based and acrylsilane-based, titanate-based, aluminum-based, chromium-based, zirconium-based, and boron-based coupling agents. Among these, a silane coupling agent and a titanate coupling agent are preferred.

【0017】繊維補強材を上記表面処理剤で処理する方
法については特に制限はなく、従来用いられている方
法、例えば水溶液法,有機溶媒法,スプレー法など任意
の方法を用いることができる。本発明においては、この
繊維強化フェノール樹脂における繊維補強材の含有量
は、各種の状況に応じて適宜定めればよいが、通常10
〜80重量%の範囲で選定される。この含有量が10重
量%未満では成形品の強度が低下するとともに、耐燃性
も低下するおそれがあり、80重量%を超えると含浸性
が低下し、表面状態が悪くなる傾向がみられる。成形品
の強度,耐熱性,表面状態などの面から、この繊維補強
材の特に好ましい含有量は30〜70重量%の範囲であ
る。さらに、この繊維強化フェノール樹脂には、本発明
の目的が損なわれない範囲で、タルク,シリカ,マイ
カ,クレー,半水石膏,炭酸カルシウムなどの無機フィ
ラーを適宜含有していてもよい。
The method for treating the fiber reinforcing material with the above surface treating agent is not particularly limited, and any conventionally used method such as an aqueous solution method, an organic solvent method, or a spray method can be used. In the present invention, the content of the fiber reinforcing material in the fiber reinforced phenolic resin may be appropriately determined according to various situations, but is usually 10
-80% by weight is selected. If the content is less than 10% by weight, the strength of the molded product may be lowered and the flame resistance may be lowered, and if it exceeds 80% by weight, the impregnating property is lowered and the surface condition tends to be deteriorated. From the viewpoints of strength, heat resistance, surface condition and the like of the molded product, the particularly preferable content of this fiber reinforcing material is in the range of 30 to 70% by weight. Further, the fiber-reinforced phenolic resin may appropriately contain an inorganic filler such as talc, silica, mica, clay, hemihydrate gypsum, calcium carbonate, etc. within a range not impairing the object of the present invention.

【0018】次に、上記繊維強化フェノール樹脂からな
る成形品の製造方法について説明する。該繊維強化フェ
ノール樹脂においては、原料の未硬化フェノール樹脂と
して、レゾール型液状フェノール樹脂が好ましく用いら
れる。このレゾール型液状フェノール樹脂は、公知の方
法、例えばフェノール,クレゾール,キシレノール,ア
ルキルフェノールなどのフェノール類1モルとホルムア
ルデヒド,アセトアルデヒド,フルフラールなどのアル
デヒド類0.3〜3.0モルとをアルカリ性触媒の存在下反
応させることにより、初期縮合物として調製することが
できる。続いて、このようにして調製したレゾール型液
状フェノール樹脂,繊維補強材及び所望により無機フィ
ラーを用い、公知の成形方法、例えば連続成形法,ハン
ドレイアップ法,スプレーアップ法,プリフォームマッ
チドダイ法,コールドプレス法,レジンインジェクショ
ン法,真空バッグ法,フィラメントワインディング法,
プルトルージョン法などにより、常温ないし250℃程
度の温度で、所望形状に強化成形することにより、所望
の繊維強化フェノール樹脂からなる成形品が得られる。
Next, a method of manufacturing a molded article made of the above fiber reinforced phenol resin will be described. In the fiber-reinforced phenolic resin, a resol type liquid phenolic resin is preferably used as the uncured phenolic resin as a raw material. This resol type liquid phenol resin is prepared by a known method, for example, 1 mol of phenols such as phenol, cresol, xylenol and alkylphenol and 0.3 to 3.0 mol of aldehydes such as formaldehyde, acetaldehyde and furfural in the presence of an alkaline catalyst. By reacting under, it can be prepared as an initial condensate. Then, using the resol-type liquid phenolic resin thus prepared, the fiber reinforcing material and optionally an inorganic filler, known molding methods such as continuous molding method, hand lay-up method, spray-up method, preform matched die method. , Cold press method, resin injection method, vacuum bag method, filament winding method,
A molded product made of a desired fiber-reinforced phenolic resin can be obtained by reinforced molding into a desired shape at a temperature of from room temperature to about 250 ° C. by a pultrusion method.

【0019】上記成形法の中で、特に繊維補強材にフェ
ノール樹脂を含浸し、連続的に加温金型又は加熱炉に通
して硬化成形させるプルトルージョン法(引抜き成形
法)及び連続成形法が好適である。これらの成形法によ
ると、同一断面形状で任意の長さの成形品が、短時間で
効率よく得られるので有利である。この際、硬化剤を使
用せずに高温で加熱硬化させてもよく、また、所望によ
り酸硬化剤を使用し、常温又は低い温度で加熱硬化させ
てもよい。この酸硬化剤としては特に制限はなく、従来
繊維強化フェノール樹脂の成形において、酸硬化剤とし
て慣用されているものの中から、任意のものを選択して
用いることができる。
Among the above-mentioned molding methods, there are a pull-through molding method and a continuous molding method, in which a fiber reinforcing material is impregnated with a phenolic resin and continuously cured through a heating mold or a heating furnace. It is suitable. According to these molding methods, a molded product having the same cross-sectional shape and an arbitrary length can be obtained efficiently in a short time, which is advantageous. At this time, heat curing may be performed at a high temperature without using a curing agent, and if desired, an acid curing agent may be used and heat curing may be performed at room temperature or a low temperature. The acid curing agent is not particularly limited, and any one can be selected from those conventionally used as an acid curing agent in the molding of fiber-reinforced phenolic resins.

【0020】本発明の非埋設ケーブル用保護材の形状に
ついては特に制限はなく、様々な形状があるが、要する
に保護管で被覆されたケーブルを、外部に対して部分的
にあるいは完全に遮蔽,目隠しあるいは囲繞できる形態
であればよい。具体的な形状としては、平板状,断面略
コ字状,断面略樋状,断面略U字状,断面略V字状,曲
板状,箱状,半円筒状,円筒状などを好ましく挙げるこ
とができる。
The shape of the protective material for a non-embedded cable of the present invention is not particularly limited, and there are various shapes. In short, the cable covered with the protective tube is partially or completely shielded from the outside, Any form that can be blindfolded or surrounded can be used. Specific examples of preferred shapes include a flat plate shape, a substantially U-shaped section, a substantially gutter-shaped section, a substantially U-shaped section, a substantially V-shaped section, a curved plate shape, a box shape, a semi-cylindrical shape, and a cylindrical shape. be able to.

【0021】図1(a)〜(e)は、それぞれ本発明の
保護材の形状の異なる例を示す概略斜視図であり、図1
(a)は断面略コ字状の保護材2であり、図1(b)は
断面略樋状あるいは断面略U字状の保護材2であり、図
1(c)は断面略コ字状(但し、支持棹あるいは吊具3
に保護材2を係合させた形態)の保護材2であり、図1
(d)は断面略コ字状の保護材2(但し、下部の平板中
央で2分割し、Hファスナー4で長さ方向に連結された
ものであり、補強とタワミ防止の効果を目的とする)で
あり、図1(e)は断面略コ字状の保護材2(但し、下
部の平板両端部に、Uファスナー4’を長さ方向に組み
込んだものであり、補強とタワミ防止の効果を目的とす
る)である。これらの保護材は、対象である非埋設ケー
ブル1(つまり、橋梁やトンネル内に敷設されたケーブ
ル)の敷設方向に沿って、該ケーブルを外部に対して部
分的にあるいは完全に遮蔽,目隠しあるいは囲繞するよ
うに延設されている。図2(a),(b)はそれぞれ本
発明の保護材2の形状の別の例を示す正面概略図及び側
面概略図である。該図2によれば、複数個の保護管1
(ケーブルを収容した保護管)を支えた支持体5,5’
が平板状の保護材2に固設されており、また該保護材2
同士がHファスナー4等の連結具で接続され、ケーブル
1の敷設方向に沿って延設されている。なお、ケーブル
の保護管1には、通常ポリエステルFRPが用いられて
いる。
1 (a) to 1 (e) are schematic perspective views showing examples of the protective material of the present invention having different shapes.
1A is a protective member 2 having a substantially U-shaped cross section, FIG. 1B is a protective member 2 having a substantially gutter-shaped or U-shaped cross section, and FIG. 1C is a substantially U-shaped cross section. (However, the support rod or the hanger 3
1 is a protective member 2 in which the protective member 2 is engaged with
(D) is a protective material 2 having a substantially U-shaped cross section (however, it is divided into two parts at the center of the lower flat plate and connected in the longitudinal direction by an H fastener 4 for the purpose of reinforcement and anti-twisting effect. 1 (e) is a protective member 2 having a substantially U-shaped cross section (however, U fasteners 4'are incorporated in both ends of the lower flat plate in the lengthwise direction, and the effect of reinforcement and deflection is prevented. Is intended). These protective materials are used to partially or completely shield the outside cable 1 from the outside along the laying direction of the target non-embedded cable 1 (that is, the cable laid inside the bridge or tunnel), It is extended so as to surround it. 2A and 2B are a schematic front view and a schematic side view showing another example of the shape of the protective member 2 of the present invention. According to FIG. 2, a plurality of protection tubes 1
Supports 5, 5'supporting (protection tube containing cable)
Is fixed to a flat plate-shaped protective member 2, and the protective member 2
They are connected to each other by a connecting tool such as an H fastener 4 and extend along the laying direction of the cable 1. Polyester FRP is usually used for the protective tube 1 of the cable.

【0022】本発明の保護材が適用されるケーブルは、
非埋設ケーブル(すなわち、外部に開放された状態で敷
設されたケーブル、更に詳しくは保護管で被覆されたケ
ーブルが、そのまま外気に曝された状態で敷設されたケ
ーブル)であればよく、敷設個所については特に制限は
ないが、例えば橋梁、あるいは通常のトンネルや海底ト
ンネルなどのトンネル内に敷設されたケーブルが特に好
適である。また、本発明の保護材で非埋設ケーブルを保
護(遮蔽,目隠しあるいは囲繞)するにあたって、該保
護材の配設位置は、該ケーブルの敷設状況に応じて適宜
定めればよいが、ケーブルを火災から有効に護るために
は、非埋設ケーブルとの間に所定の間隙を設けるような
位置に定めることが好ましい。このようにケーブルと保
護材の間に所定の間隙を設ければ、たとえ火炎によって
保護材が過熱してもその熱はこの間隙によって遮断さ
れ、ケーブルまで延焼する事態を回避することができ
る。
A cable to which the protective material of the present invention is applied is
A non-embedded cable (that is, a cable that is laid open to the outside, more specifically, a cable that is covered with a protective tube and that is laid as it is exposed to the outside air) There is no particular limitation on the above, but a cable laid in a bridge or a tunnel such as an ordinary tunnel or an undersea tunnel is particularly suitable. Further, in protecting (shielding, blinding or enclosing) a non-embedded cable with the protective material of the present invention, the position of the protective material may be appropriately determined according to the laying condition of the cable, but the cable should be protected from fire. In order to effectively protect the cable from the above, it is preferable to set the position such that a predetermined gap is provided between the cable and the non-embedded cable. If a predetermined gap is provided between the cable and the protective material in this way, even if the protective material overheats due to a flame, the heat is blocked by this gap, and it is possible to avoid a situation in which the cable spreads.

【0023】[0023]

【実施例】次に、本発明を実施例によりさらに詳しく説
明するが、本発明は、これらの例によってなんら限定さ
れるものではない。なお、成形品の性能は下記の要領に
従って評価した。 (1)曲げ強度 JIS K−7055に準拠し、常温における曲げ強度
を測定した。 (2)耐熱性 150℃における曲げ強度を上記(1)と同様にして測
定し、その保持率〔(150℃曲げ強度/常温曲げ強
度)×100〕を求めた。 (3)衝撃強度 JIS K−7211に準拠し、常温における衝撃強度
求めた。 (4)難燃性 JIS A−1321に準拠し、表面試験を行い、発煙
係数(CA)を求めるとともに、難燃性を評価した。な
お、難燃二級の場合、該CAは60以下である。 (5)耐候性 スガ試験機,デューサイクルウェザーメーターWE−S
UN,DC型のウェザーメーターを用いて、60分照射
×相対湿度50%,60分消灯×相対湿度100%,ブ
ラックパネル温度63℃の条件で促進耐候試験を行い、
120時間曝露したのち、上記(1)と同様にして曲げ
強度を求め、その保持率〔(テスト後曲げ強度/テスト
前曲げ強度)×100〕を求め、耐候性を評価した。 (6)作業性 現状取付け時の難易によって作業性を評価した。 (7)吸水率 JIS K−6911に準拠し、試験片を温度23±1
℃の蒸留水中に24±1時間浸漬し、下記式より求め
た。 A=(W2 −W1)/W1 ×100 A:吸水率(%) W1 : 吸水前の試験片の質量(g) W2 : 吸水後の試験片の質量(g)
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The performance of the molded product was evaluated according to the following procedure. (1) Bending strength Based on JIS K-7055, bending strength at room temperature was measured. (2) Heat resistance The bending strength at 150 ° C was measured in the same manner as in (1) above, and the retention rate [(150 ° C bending strength / normal temperature bending strength) x 100] was obtained. (3) Impact strength Based on JIS K-7211, the impact strength at room temperature was determined. (4) Flame retardancy A surface test was conducted in accordance with JIS A-1321 to obtain a smoke emission coefficient (CA), and flame retardancy was evaluated. In the case of the second-class flame retardant, the CA is 60 or less. (5) Weather resistance Suga testing machine, due cycle weather meter WE-S
Using a UN or DC type weather meter, an accelerated weathering test was conducted under the conditions of 60 minutes irradiation × 50% relative humidity, 60 minutes extinguished × 100% relative humidity, and a black panel temperature of 63 ° C.
After 120 hours of exposure, bending strength was determined in the same manner as in (1) above, and the retention rate [(bending strength after test / bending strength before test) × 100] was obtained to evaluate weather resistance. (6) Workability Workability was evaluated by the difficulty of the current installation. (7) Water absorption rate According to JIS K-6911, the temperature of the test piece was 23 ± 1.
It was immersed in distilled water at ℃ for 24 ± 1 hours, and calculated from the following formula. A = (W 2 −W 1 ) / W 1 × 100 A: Water absorption rate (%) W 1 : Mass of test piece before water absorption (g) W 2 : Mass of test piece after water absorption (g)

【0024】実施例1 ガラスロービング/ガラスコンテニュアスマット/ガラ
スクロスの組合せに、レゾール型液状フェノール樹脂
〔昭和高分子(株)製,商品名:BRL−706〕を含
浸させたのち、180℃の金型(長さ:800mm)の
中を通して硬化させながら、30cm/分の速度で引抜
いて成形し、厚さ3mm、重量5.4kg/m2 、ガラス
繊維含有量70重量%のフェノール樹脂FRPからなる
平板状の成形品を得た。この成形品の比重,曲げ強度,
耐熱性,衝撃強度,難燃性,耐候性,耐水性(吸水率)
を求めるとともに、作業性を評価した。結果を第1表に
示す。
Example 1 A combination of glass roving / glass continuous matte / glass cloth was impregnated with a resol type liquid phenol resin [manufactured by Showa Polymer Co., Ltd., trade name: BRL-706]. While curing through a mold (length: 800 mm), it is drawn out at a speed of 30 cm / min and molded to obtain a phenol resin FRP having a thickness of 3 mm, a weight of 5.4 kg / m 2 , and a glass fiber content of 70% by weight. A flat plate-shaped molded product was obtained. Specific gravity, bending strength,
Heat resistance, impact strength, flame resistance, weather resistance, water resistance (water absorption)
And the workability was evaluated. The results are shown in Table 1.

【0025】実施例2 レゾール型液状フェノール樹脂〔昭和高分子(株)製,
商品名:BRL−240〕100重量部に、酸硬化剤
〔昭和高分子(株)製,商品名:FRH−50〕を8重
量部の割合で配合した。次に、剥離用フィルム上にガラ
スチョップドストランドをセットしたのち、それに上記
酸硬化剤含有レゾール型液状フェノール樹脂を供給し、
ロールにてガラスチョップドストランドに該フェノール
樹脂を含浸させ、さらにその上に剥離用フィルムをかぶ
せた。次いで、これを80〜90℃に加熱炉の中を1m
/分の速度(滞留時間30分間)で連続的に通し、加熱
硬化させ、厚さ3mm,重量5.4kg/m2 ,ガラス繊
維含有量40重量%のフェノール樹脂FRPからなる平
板状の成形品を得た。この成形品の比重,曲げ強度,耐
熱性,衝撃強度,難燃性,耐候性,耐水性(吸水率)を
求めるとともに、作業性を評価した。結果を第1表に示
す。
Example 2 Resol type liquid phenol resin [Showa Highpolymer Co., Ltd.,
100 parts by weight of the product name: BRL-240 was mixed with 8 parts by weight of an acid curing agent [Showa Polymer Co., Ltd., product name: FRH-50]. Next, after setting the glass chopped strands on the peeling film, supply the acid curing agent-containing resol type liquid phenol resin to it,
A glass chopped strand was impregnated with the phenol resin by a roll, and a peeling film was further covered thereon. Then, this is heated to 80 to 90 ° C. in a heating furnace for 1 m.
A flat molded product made of phenol resin FRP having a thickness of 3 mm, a weight of 5.4 kg / m 2 , and a glass fiber content of 40% by weight, which is continuously passed through at a speed of / min (residence time of 30 minutes). Got The specific gravity, bending strength, heat resistance, impact strength, flame resistance, weather resistance, water resistance (water absorption) of this molded product were obtained, and workability was evaluated. The results are shown in Table 1.

【0026】比較例1及び比較例2 厚さ6mm,重量13kg/m2 のGRC板(比較例
1)及び厚さ6mm,重量15kg/m2 のケイカル板
(比較例2)について、比重,曲げ強度,耐熱性,衝撃
強度,難燃性,耐候性,耐水性(吸水率)を求めるとと
もに、作業性を評価した。結果を第1表に示す。
Comparative Example 1 and Comparative Example 2 A GRC plate having a thickness of 6 mm and a weight of 13 kg / m 2 (Comparative Example 1) and a calcareous plate having a thickness of 6 mm and a weight of 15 kg / m 2 (Comparative Example 2) were subjected to specific gravity and bending. Strength, heat resistance, impact strength, flame resistance, weather resistance, water resistance (water absorption) were obtained, and workability was evaluated. The results are shown in Table 1.

【0027】比較例3 厚さ3.2mm、重量25kg/m2 の鉄板について、比
重,衝撃強度を求めるとともに、作業性を評価した。結
果を第1表に示す。鉄板は不燃性であるので、難燃性は
難燃一級である。
Comparative Example 3 With respect to an iron plate having a thickness of 3.2 mm and a weight of 25 kg / m 2 , the specific gravity and the impact strength were determined and the workability was evaluated. The results are shown in Table 1. Since the iron plate is nonflammable, the flame retardancy is first class flame retardant.

【0028】比較例4 実施例1と同様の構成のガラス繊維を用い、引抜き成形
法により、厚さ3mm,重量5.4kg/m2 ,ガラス繊
維含有量60重量%のポリエステルFRPから成る成形
品を得た。この成形品の比重,曲げ強度,耐熱性,衝撃
強度,難燃性,耐候性,耐水性(吸水率)を求めるとと
もに作業性を評価した。結果を第1表に示す。
Comparative Example 4 A molded product made of polyester FRP having a thickness of 3 mm, a weight of 5.4 kg / m 2 , and a glass fiber content of 60% by weight, using the glass fiber having the same constitution as in Example 1 and by a drawing method. Got The specific gravity, bending strength, heat resistance, impact strength, flame resistance, weather resistance and water resistance (water absorption) of this molded product were obtained and workability was evaluated. The results are shown in Table 1.

【0029】[0029]

【表1】 [Table 1]

【0030】[0030]

【表2】 [Table 2]

【0031】第1表から分かるように、従来保護材とし
て用いられているGRC板及びケイカル板は、難燃性は
難燃一級で良好であるものの、GRC板は比重が2より
大きく、フェノール樹脂FRP成形品やポリエステルF
RP成形品に比べて重量が重いため、取付け時の作業性
が悪く、かつ曲げ強度が低い上、吸水率が大きく、衝撃
強度が充分ではない。また、ケイカル板は曲げ強度及び
衝撃強度がGRC板より低く、かつ吸水率も大きい。さ
らにGRC板は高温になるとその中に含まれている水分
の影響で爆裂現象が生じ、形状破壊を起こす。鉄板は不
燃性であるが、比重が極めて大きく重いので、取付け時
の作業性が悪く、しかも磁気を帯びやすいので、送電ロ
スをもたらすおそれがある。一方、ポリエステルFRP
成形品は比重が小さく、軽量であるので、取付け時の作
業性が良い上、曲げ強度,衝撃強度及び耐候性は良好で
あるが、耐熱性に劣り、また難燃性が難燃三級と悪く、
かつ燃えた場合に発煙量が多く、しかも黒い煙を発生す
る。これに対し、本発明のフェノール樹脂FRP成形品
は、比重が小さく軽量で取付け時の作業性がよい上、吸
水率が小さく、曲げ強度,耐熱性,衝撃強度,難燃性,
耐候性のいずれも良好であり、しかも燃えた場合に発煙
量が少なく、その煙の色も淡い白色である。
As can be seen from Table 1, the GRC plate and the silica plate conventionally used as the protective material have good flame retardancy of first-class flame retardancy, but the GRC plate has a specific gravity of more than 2 and a phenol resin. FRP molded products and polyester F
Since it is heavier than the RP molded product, the workability at the time of mounting is poor, the bending strength is low, the water absorption rate is large, and the impact strength is not sufficient. Further, the bending strength and impact strength of the calcareous plate are lower than that of the GRC plate, and the water absorption is also large. Furthermore, when the temperature of the GRC plate becomes high, an explosion phenomenon occurs due to the effect of moisture contained therein, and the shape of the GRC plate is destroyed. Although the iron plate is non-combustible, its specific gravity is extremely large and heavy, so that workability at the time of mounting is poor and it is easily magnetized, which may result in power transmission loss. On the other hand, polyester FRP
Since the molded product has a low specific gravity and is lightweight, it has good workability during installation and good bending strength, impact strength, and weather resistance, but it is inferior in heat resistance and flame retardant is class 3 flame-retardant. Bad,
When it burns, it emits a large amount of smoke and produces black smoke. On the other hand, the phenolic resin FRP molded product of the present invention has a small specific gravity, is light in weight, has good workability at the time of mounting, and has a small water absorption rate, and has bending strength, heat resistance, impact strength, flame retardancy,
It has good weather resistance, emits a small amount of smoke when burned, and the color of the smoke is pale white.

【0032】[0032]

【発明の効果】本発明の非埋設ケーブル用保護材は繊維
強化フェノール樹脂からなるものであって、比重が小さ
く、軽量で取付け時の作業性が良い上、吸水率が小さ
く、強度,耐熱性,耐燃性,低発煙性,耐侯性,耐塩害
性などにも優れ、しかも非磁性体であるので磁気を帯び
ることがなく、磁気による送電ロスをもたらすことがな
い。また、燃えた場合、発煙量が少なく、かつその煙の
色は淡い白色であり、黒煙を発生しない。本発明の保護
材は上記のような優れた特徴を有するので、特に橋梁や
トンネル(海底トンネルも含む)内に敷設されたケーブ
ルを火災などから護る保護材として極めて好適である。
The protective material for a non-embedded cable of the present invention is made of fiber reinforced phenolic resin, has a small specific gravity, is light in weight, has good workability during installation, and has a low water absorption rate, strength and heat resistance. Excellent in flame resistance, low smoke generation, weather resistance, salt damage resistance, etc. Moreover, since it is a non-magnetic material, it is not magnetized and does not cause power transmission loss due to magnetism. Further, when burned, the amount of smoke generated is small, and the color of the smoke is pale white, so that black smoke is not generated. Since the protective material of the present invention has the excellent characteristics as described above, it is extremely suitable as a protective material for protecting a cable laid in a bridge or a tunnel (including a submarine tunnel) from a fire.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の保護材の形状の異なる例を示す概略斜
視図である。
FIG. 1 is a schematic perspective view showing an example in which the shape of a protective material of the present invention is different.

【図2】本発明の保護材の形状の別の例を示す正面概略
図及び側面概略図である。
FIG. 2 is a schematic front view and a schematic side view showing another example of the shape of the protective material of the present invention.

【符号の説明】[Explanation of symbols]

1 :ケーブルを収容した保護管 2 :本発明の保護材 3 :支持棹あるいは吊具 4 :Hファスナー 4’:Uファスナー 5 :支持体 5' :支持体 1: Protective tube accommodating a cable 2: Protective material of the present invention 3: Support rod or suspension tool 4: H fastener 4 ': U fastener 5: Support body 5': Support body

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小出 高顕 東京都千代田区神田錦町3丁目20番地 昭 和高分子株式会社内 (72)発明者 真清 武 東京都千代田区神田錦町3丁目20番地 昭 和高分子株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takaaki Koide 3-20 Kandanishikicho, Chiyoda-ku, Tokyo Awawa Polymer Co., Ltd. Within Showa Polymer Co., Ltd.

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 繊維強化フェノール樹脂からなる非埋設
ケーブル用保護材。
1. A protective material for a non-embedded cable, which comprises a fiber-reinforced phenolic resin.
【請求項2】 非埋設ケーブルが、橋梁又はトンネル内
に敷設されたものである請求項1記載の非埋設ケーブル
用保護材。
2. The protective material for a non-embedded cable according to claim 1, wherein the non-embedded cable is laid inside a bridge or a tunnel.
【請求項3】 繊維強化フェノール樹脂が、比重2以下
であるとともに、JIS K−7055による曲げ試験
において、曲げ強度が8kgf/mm2 以上であって、
JIS A−1321による難燃性試験において、難燃
二級以上である請求項1又は2記載の非埋設ケーブル用
保護材。
3. The fiber-reinforced phenolic resin has a specific gravity of 2 or less and a bending strength of 8 kgf / mm 2 or more in a bending test according to JIS K-7055.
The flame-retardant test according to JIS A-1321 is a flame-retardant test, and the flame-retardant test material is a non-embedded cable protective material according to claim 1 or 2.
【請求項4】 繊維強化フェノール樹脂が、繊維補強材
10〜80重量%を含有するものである請求項1又は2
記載の非埋設ケーブル用保護材。
4. The fiber-reinforced phenolic resin contains 10 to 80% by weight of a fiber reinforcing material.
Protective material for non-embedded cables described.
【請求項5】 繊維補強材が、ガラス繊維である請求項
4記載の非埋設ケーブル用保護材。
5. The protective material for a non-embedded cable according to claim 4, wherein the fiber reinforcing material is glass fiber.
【請求項6】 保護材の形状が、平板状,断面略コ字
状,断面略樋状,断面略U字状,断面略V字状,曲板
状,箱状,半円筒状又は円筒状である請求項1又は2記
載の非埋設ケーブル用保護材。
6. The protective material has a flat plate shape, a substantially U-shaped section, a substantially gutter-shaped section, a substantially U-shaped section, a substantially V-shaped section, a curved plate shape, a box shape, a semi-cylindrical shape or a cylindrical shape. The protective material for a non-embedded cable according to claim 1 or 2.
JP8113349A 1996-05-08 1996-05-08 Non-buried cable protecting member Pending JPH09308043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8113349A JPH09308043A (en) 1996-05-08 1996-05-08 Non-buried cable protecting member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8113349A JPH09308043A (en) 1996-05-08 1996-05-08 Non-buried cable protecting member

Publications (1)

Publication Number Publication Date
JPH09308043A true JPH09308043A (en) 1997-11-28

Family

ID=14610011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8113349A Pending JPH09308043A (en) 1996-05-08 1996-05-08 Non-buried cable protecting member

Country Status (1)

Country Link
JP (1) JPH09308043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104158133A (en) * 2014-08-13 2014-11-19 宁波华缘玻璃钢电器制造有限公司 Cable duct box device for rail transportation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104158133A (en) * 2014-08-13 2014-11-19 宁波华缘玻璃钢电器制造有限公司 Cable duct box device for rail transportation

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