JPH05288970A - Water stopping tape - Google Patents
Water stopping tapeInfo
- Publication number
- JPH05288970A JPH05288970A JP4094320A JP9432092A JPH05288970A JP H05288970 A JPH05288970 A JP H05288970A JP 4094320 A JP4094320 A JP 4094320A JP 9432092 A JP9432092 A JP 9432092A JP H05288970 A JPH05288970 A JP H05288970A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorptive polymer
- tape
- coating material
- polymer
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000002250 absorbent Substances 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011230 binding agent Substances 0.000 abstract description 6
- 239000013307 optical fiber Substances 0.000 description 15
- 230000000903 blocking effect Effects 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010034133 Pathogen resistance Diseases 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は止水テープに係り、さら
に詳しくは光ファイバケーブルなどに浸入した水の止水
に用いられる止水テープに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-stop tape, and more particularly to a water-stop tape used for stopping water that has entered an optical fiber cable or the like.
【０００２】[0002]
【従来の技術】近年、押え巻に止水テープを用いた吸水
形防水光ファイバケーブルが開発され、従来の防水仕様
であるガス保守ケーブルのように保守点検を必要とせ
ず、また、ジェリーケーブルに比べて接続作業性が良好
なことから多用されつつある。2. Description of the Related Art In recent years, a water-absorption type waterproof optical fiber cable using a waterproof tape around a presser foot has been developed, which does not require maintenance and inspection like the conventional water-proof gas maintenance cable. Compared to this, it is being used a lot because of its good connection workability.
【０００３】図１はこのような吸水形防水光ファイバケ
ーブルの一例を示したもので、中心にテンションメンバ
ー１が挿通されたスロットロッド２にテープ状の光ファ
イバ心線３を複数積層して収納するスロット４を設ける
とともに、これらの外周に止水テープ５を巻回または縦
沿えし、さらにその上にシース６を設けて構成され、万
一、外部から水が侵入した場合に止水テープ５がこれを
吸収して膨潤することにより水の拡散、走水を防止し、
止水効果を発揮するようになっている。FIG. 1 shows an example of such a water-absorbing waterproof optical fiber cable, in which a plurality of tape-shaped optical fiber core wires 3 are stacked and housed in a slot rod 2 in which a tension member 1 is inserted at the center. In addition to providing the slots 4, the water blocking tape 5 is wound around or longitudinally arranged around these slots, and the sheath 6 is further provided on the slot 4, so that the water blocking tape 5 can be provided if water enters from the outside. Absorbs this and swells to prevent water diffusion and running,
It is designed to exert a water blocking effect.
【０００４】しかして、上記止水テープは、一般に、基
材上に、吸水性ポリマーとバインダーとを混合した塗料
を塗布し乾燥して吸水性の膨潤層を設けた構造とされて
おり、通常、吸水性の膨潤層側をケーブルの内側、すな
わちスロットロッド２側に向けて巻回または縦沿えされ
る。However, the water-stop tape generally has a structure in which a water-absorbent swelling layer is provided by coating a coating material prepared by mixing a water-absorbing polymer and a binder on a substrate and drying the coating. The water absorbent swelling layer side is wound or run longitudinally with the side of the cable facing the inside, that is, the slot rod 2 side.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
このような吸水形防水光ファイバケーブルにおいては、
保守点検を必要としないなど優れた特徴を有するもの
の、止水効果の点では未だ完全なものではなかった。However, in such a conventional water-absorption type waterproof optical fiber cable,
Although it has excellent features such as not requiring maintenance and inspection, it was not yet perfect in terms of water blocking effect.
【０００６】すなわち、たとえば上記スロットロッド２
外周に設けられたスロット４の全てにほぼ隙間なく光フ
ァイバ心線３が収納されて、止水テープ５による止水効
果が最も期待できるような構造のものであっても、防水
効果を調べるＬ字型防水試験を行った場合に 6〜7m程度
の走水（24時間後測定値）がみられた。That is, for example, the slot rod 2 described above.
Even if the optical fiber core wire 3 is housed in almost all the slots 4 provided on the outer periphery with almost no space and the water blocking effect of the water blocking tape 5 is most expected, the waterproof effect is checked L When the character-shaped waterproof test was conducted, running water of about 6 to 7 m (measured value after 24 hours) was observed.
【０００７】そこで、本発明者らは、かかる走水の発生
要因をつきとめるべく鋭意研究を重ねた結果、従来の止
水テープでは、被覆する際に吸水性ポリマーが脱落して
機械を汚染したりベタツキの原因になることのないよ
う、吸水性ポリマーを基材に対し強固に接着させてお
り、この接着力は吸水時においても保持されていること
から、吸水時において基材から遊離して吸水膨潤効果を
発揮する吸水性ポリマーの量が少なく、そのために所期
の止水効果が得られないことを見出だした。The inventors of the present invention have conducted extensive studies to find out the cause of running water, and as a result, in the conventional water-stop tape, the water-absorbent polymer may fall off during coating and may contaminate the machine. The water-absorbent polymer is firmly adhered to the base material so as not to cause stickiness, and since this adhesive force is retained even during water absorption, it is released from the base material during water absorption and absorbs water. It has been found that the amount of the water-absorbing polymer exhibiting the swelling effect is small and therefore the desired water-stopping effect cannot be obtained.
【０００８】本発明はこのような知見に基づいてなされ
たもので、吸水時において基材から遊離する吸水性ポリ
マー量を規定し、これによって、止水効果に優れ、しか
も被覆する際に機械を汚染したりベタツキを生じさせる
ことのない止水テープを提供することを目的とする。The present invention has been made on the basis of such findings, and regulates the amount of the water-absorbing polymer released from the base material during water absorption, whereby the water-stopping effect is excellent and the machine is used for coating. An object of the present invention is to provide a water blocking tape that does not become contaminated or sticky.
【０００９】[0009]
【課題を解決するための手段】本発明は、基材に吸水性
ポリマーを含有する塗料を塗布または含浸させてなる止
水テープにおいて、前記吸水性ポリマーの吸水時におけ
る遊離率が30〜60％であることを特徴としている。DISCLOSURE OF THE INVENTION The present invention provides a water-blocking tape comprising a base material coated or impregnated with a coating material containing a water-absorbent polymer, wherein the water-absorbent polymer has a release rate of 30 to 60% when absorbing water. It is characterized by
【００１０】本発明に使用される基材は、特に限定され
るものではなく、従来から押え巻用テープとして使用さ
れているポリエステルフィルム、ポリエチレンフィル
ム、ポリプロピレンフィルムなどのプラスチックフィル
ムやこれらの複合材などが使用可能であるが、なかでも
スパンボンド不織布として知られる引張張力の強いポリ
エステルなどの長繊維からなる不織布が適している。ポ
リエステルスパンボンド不織布は、耐熱性、耐バクテリ
ア性にも優れており、特に好ましい。The base material used in the present invention is not particularly limited, and plastic films such as polyester films, polyethylene films, polypropylene films and the like, which have been conventionally used as press-winding tapes, and composite materials thereof, etc. However, a non-woven fabric made of long fibers such as polyester having a high tensile tension, which is known as a spun-bonded non-woven fabric, is suitable. The polyester spunbond nonwoven fabric is particularly preferable because it has excellent heat resistance and bacteria resistance.
【００１１】また、このような基材に塗布または含浸さ
せる吸水性ポリマーを含有する塗料は、基本的に吸水性
ポリマーとバインダーとを混合したものであって、吸水
性ポリマーの吸水時における遊離率が30〜60％となるも
のである。ここで、吸水時における遊離率は次式で示さ
れる。A coating material containing a water-absorbing polymer to be coated or impregnated on such a substrate is basically a mixture of a water-absorbing polymer and a binder, and the release rate of the water-absorbing polymer when absorbing water. Is 30-60%. Here, the release rate at the time of absorbing water is shown by the following equation.
【００１２】（ 1−Ｒa ／Ｒb ）×100 ただし、Ｒa はティーバッグ法により求めた吸水倍率、
Ｒb はどぶ漬け法により求めた吸水倍率で、それぞれ次
のようにして求められる。(1-Ra / Rb) × 100 where Ra is the water absorption capacity determined by the Teabag method,
Rb is a water absorption ratio obtained by the dobu-zuke method, and is obtained as follows.
【００１３】Ｒa …約1gの試料（止水テープ）を秤量
し、人工海水 300mlに 3分間浸漬する。次いで、 100メ
ッシュ金属製ふるいで濾過し、 3分後にふるいごと重量
を測定し、Ｗ1 とする。別に、同じふるいで人工海水 3
00mlのみを濾過し、 3分後にふるいの重量を測定し、Ｗ
2 とする。試料の秤量値をＷ0 として、Ｒa は（Ｗ1 −
Ｗ2 ）／Ｗ0 で求められる。Ra: Approximately 1 g of sample (water blocking tape) is weighed and immersed in 300 ml of artificial seawater for 3 minutes. Then, the mixture is filtered through a 100-mesh metal sieve, and after 3 minutes, the weight of the sieve and the weight of the sieve are measured to obtain W 1 . Separately, with the same sieve, artificial seawater 3
Only 00ml is filtered and after 3 minutes the sieve is weighed.
Set to 2 . The weighed value of the sample as W 0, Ra is (W 1 -
It is calculated by W 2 ) / W 0 .
【００１４】Ｒb …約1gの試料（止水テープ）を秤量
し、人工海水 300mlに 3分間浸漬する。次いで、試料を
ピンセットなどで摘んで取り出し、 100メッシュ金属製
ふるいで水切りし、 3分後にふるいごと重量を測定し、
Ｗ3 とする。別に、乾燥したふるいの重量を測定し、Ｗ
4 とする。試料の秤量値をＷ0 として、Ｒb は（Ｗ3 −
Ｗ4 ）／Ｗ0 で求められる。Rb ... About 1 g of sample (water blocking tape) is weighed and immersed in 300 ml of artificial seawater for 3 minutes. Next, pick up the sample by picking it with tweezers etc., drain it with a 100 mesh metal sieve, measure the weight together with the sieve after 3 minutes,
And W 3. Separately, weigh the dry sieve and
Set to 4 . Assuming that the weight value of the sample is W 0 , Rb is (W 3 −
W 4 ) / W 0 .
【００１５】このような吸水時における遊離率が30％未
満であると、浸入した水によって遊離する吸水性ポリマ
ーが少なく、空隙を十分に埋めることができずに止水効
果が不十分となり、逆に60％を越えると、浸入した水に
よって遊離し流される吸水性ポリマーの量が多すぎ、や
はり空隙を十分に埋めることができずに止水効果が不十
分となる。すなわち、遊離率が上記範囲の場合に、浸入
した水によって適量の吸水性ポリマーが遊離し、この遊
離した吸水性ポリマーが水とともに流されるうちに膨潤
し、ケーブル内の隙間を埋めて止水することができる。If the release rate at the time of water absorption is less than 30%, the amount of water-absorbing polymer released by infiltrated water is small, the voids cannot be sufficiently filled, and the water-stopping effect becomes insufficient. If it exceeds 60%, the amount of the water-absorbing polymer released by the infiltrated water is too large, and the voids cannot be sufficiently filled and the water-stopping effect becomes insufficient. That is, when the liberation rate is in the above range, an appropriate amount of the water-absorbent polymer is liberated by the infiltrated water, the liberated water-absorbent polymer swells while being flushed with water, and fills the gap in the cable to stop water. be able to.
【００１６】このような吸水性ポリマーの吸水時におけ
る遊離率が30〜60％となる塗料は、バインダーを選択す
ることによって得ることができる。A coating having such a water-absorbing polymer that the liberation rate upon absorption of water is 30 to 60% can be obtained by selecting a binder.
【００１７】なお、本発明において使用する吸水性ポリ
マーとしては、耐バクテリア性が良好で、また、吸水に
より生成するゲルが中性で、さらに泥水中に長期間放置
しても水素の発生がほとんど認められないポリアクリル
酸ソーダ架橋体あるいはこれを変成したものが適してい
る。また、バインダーには、公知の各種合成ゴム、合成
樹脂のなかから任意に選択されてよいが、なかでも耐バ
クテリア性の良好なブチル系やスチレン・ブタジエン系
のゴムが適している。As the water-absorbent polymer used in the present invention, the bacteria resistance is good, the gel formed by water absorption is neutral, and most of the hydrogen is generated even if left in muddy water for a long time. A polysodium acrylate crosslinked product which is not recognized or a modified product thereof is suitable. The binder may be arbitrarily selected from various known synthetic rubbers and synthetic resins, but among them, butyl rubber and styrene-butadiene rubber, which have good bacterial resistance, are suitable.
【００１８】本発明において、このような吸水性ポリマ
ーを含有する塗料の塗布または含浸させる量としては、
吸水性ポリマー量が30〜130g/m2 となる範囲が適してい
る。また、吸水性ポリマーを含有する塗料を塗布するも
のにおいては、塗料の塗布は基材の片面、両面のいずれ
であってもよい。In the present invention, the coating or impregnating amount of the coating material containing such a water-absorbing polymer is
A range in which the amount of water-absorbing polymer is 30 to 130 g / m 2 is suitable. Further, in the case of applying a coating material containing a water-absorbing polymer, the coating material may be applied on one side or both sides of the substrate.
【００１９】[0019]
【作用】本発明の止水テープでは、水の浸入によって適
度な量の吸水性ポリマーが遊離するので、これを巻回も
しくは縦沿えしたケーブルにおいては、遊離した吸水性
ポリマーが水とともに流されるうちに膨潤してケーブル
内の空隙を埋め、ほぼ完全に止水することができる。In the water-stop tape of the present invention, an appropriate amount of the water-absorbent polymer is released by the infiltration of water. Therefore, in a cable wound or laid along the length of the water-absorbent polymer, while the released water-absorbent polymer flows with water. It can swell to fill the voids in the cable and stop the water almost completely.
【００２０】また、吸水性ポリマーの遊離は吸水時にお
けるものであって、製造時や被覆時に遊離するものでは
ないので、機械の汚染やベタツキのおそれもない。Further, since the water-absorbent polymer is released during water absorption and is not released during production or coating, there is no risk of machine contamination or stickiness.
【００２１】[0021]
【実施例】以下、実施例および比較例を記載する。EXAMPLES Examples and comparative examples will be described below.
【００２２】実施例、比較例 ポリエステルスパンボンド不織布（厚さ 180μｍ、目付
60g/m2 旭化成工業社製）上に、ポリアクリル酸ソー
ダ架橋体（吸水性ポリマー）を各種ブチル系ゴム（バイ
ンダー）に混合して、吸水性ポリマーが基材1m2 あたり
140gとなるように塗布し、乾燥して、厚さ0.31mm、幅30
mm、吸水性ポリマーの吸水時の遊離率がそれぞれ35％、
45％、55％の本発明にかかる止水テープを製造した。Examples and Comparative Examples Polyester spunbonded nonwoven fabric (thickness 180 μm, basis weight
60g / m 2 Asahi Kasei Kogyo Co., Ltd.), cross-linked sodium polyacrylate (water-absorbing polymer) was mixed with various butyl rubbers (binder), and the water-absorbing polymer per 1 m 2 of substrate
Apply to 140g, dry, thickness 0.31mm, width 30
mm, the release rate of water-absorbent polymer when absorbing water is 35%,
45% and 55% water blocking tapes according to the invention were produced.
【００２３】また、比較のために、同様にして吸水性ポ
リマーの吸水時の遊離率がそれぞれ10％、20％、70％、
90％の止水テープを製造した。Further, for comparison, the release rates of the water-absorbent polymer upon absorption of water are 10%, 20%, 70%, and
A 90% waterproof tape was produced.
【００２４】次いで、これらの各止水テープを用いて、
図１に示したような光ファイバケーブルを製造した。す
なわち、中心に 2.6mmφのテンションメンバー１を有
し、外周にらせん状に5本のスロット４（幅 1.4mm、深
さ 2.4mm）が形成され、これらの各スロット４に、厚さ
0.38mm、幅1.10mmの 4心のテープ状光ファイバ心線３が
5枚ずつ積層されて撚込まれた構造の 9.4mmφのポリエ
チレン製のスロットロッド２の外周に、上記止水テープ
５を、吸水性ポリマー側を内側にして 1/2ラップで重ね
巻きし、次いで、その上にポリエチレンシース６を被覆
して、外径約16mmの光ファイバケーブルを製造した。Then, using each of these water blocking tapes,
An optical fiber cable as shown in FIG. 1 was manufactured. That is, it has a 2.6 mmφ tension member 1 in the center, and five slots 4 (width 1.4 mm, depth 2.4 mm) are spirally formed on the outer circumference, and each of these slots 4 has a thickness.
0.38mm, width 1.10mm 4 core tape optical fiber core wire 3
On the outer circumference of the 9.4 mmφ polyethylene slot rod 2 having a structure in which five sheets are laminated and twisted, the above water-stop tape 5 is lapped in a 1/2 wrap with the water-absorbent polymer side inside and then Then, a polyethylene sheath 6 was coated thereon to manufacture an optical fiber cable having an outer diameter of about 16 mm.
【００２５】続いて、このようにして得られた光ファイ
バケーブルについて、図２に示すようなＬ字型防水試験
を行った。すなわち、光ファイバケーブルを長さ 10mに
切断して試料ケーブル７とし、これを、Ｌ字管８の一端
に水密に挿着した。次いで、試料ケーブル７を水平に、
Ｌ字管８の他端を上方に向けて保持するとともに、Ｌ字
管８の中に人工海水９を加えて試料ケーブル７端面に0.
1 気圧の水圧を印加し、24時間経過後の走水長を測定し
た。Then, the optical fiber cable thus obtained was subjected to an L-shaped waterproof test as shown in FIG. That is, the optical fiber cable was cut into a length of 10 m to obtain a sample cable 7, which was watertightly attached to one end of the L-shaped tube 8. Then, place the sample cable 7 horizontally,
The other end of the L-shaped tube 8 is held upward, and artificial seawater 9 is added to the L-shaped tube 8 so that the end surface of the sample cable 7 is reduced to 0.
A water pressure of 1 atm was applied, and the running water length after 24 hours was measured.
【００２６】これらの試験結果を、吸水性ポリマーの吸
水時の遊離率、およびケーブル製造工程における吸水性
ポリマーの基材からの脱落の有無とともに表１に示す。
なお走水長は、最長到達部分までの長さを測定し試料数
5の平均値で示した。The results of these tests are shown in Table 1 together with the liberation rate of the water-absorbent polymer at the time of water absorption and the presence or absence of the water-absorbent polymer falling off the substrate in the cable manufacturing process.
The running water length is the number of samples measured by measuring the length to the longest reach.
The average value of 5 is shown.
【００２７】[0027]
【表１】 表１からも明らかなように、実施例の止水テープを用い
た光ファイバケーブルはいずれも、比較例の止水テープ
を用いた光ファイバケーブルに比べ走水長が短くなって
おり、本発明にかかる止水テープの優れた止水効果が確
認された。また、実施例のものでは、製造工程における
吸水性ポリマーの基材からの脱落もなく、この点におい
ても良好な特性を有していた。[Table 1] As is clear from Table 1, each of the optical fiber cables using the water blocking tape of the example has a shorter running length than the optical fiber cable using the water blocking tape of the comparative example. It was confirmed that the water-blocking tape of the present invention has an excellent water-blocking effect. Further, in the example, the water-absorbent polymer did not fall off from the base material in the manufacturing process, and also in this respect, it had good characteristics.
【００２８】[0028]
【発明の効果】以上説明したように、本発明の止水テー
プによれば、水の浸入によって適度な量の吸水性ポリマ
ーが遊離する構成とされているので、止水効果が向上
し、これを用いて、止水特性に優れたケーブルを得るこ
とができる。しかも、吸水性ポリマーは製造時や被覆時
においては遊離することがないので、機械の汚染やベタ
ツキなどを招くおそれもない。As described above, according to the water-stop tape of the present invention, the water-stopping effect is improved because the water-absorbent polymer is released in an appropriate amount by the infiltration of water. Using, it is possible to obtain a cable having excellent water blocking characteristics. Moreover, since the water-absorbent polymer is not released during manufacturing or coating, there is no risk of causing machine contamination or stickiness.
【図１】止水テープを用いた防水光ファイバケーブルの
一例を示す横断面図。FIG. 1 is a cross-sectional view showing an example of a waterproof optical fiber cable using a waterproof tape.
【図２】Ｌ字型防水試験を説明する概略図。FIG. 2 is a schematic diagram illustrating an L-shaped waterproof test.
１………テンションメンバー ２………スロットロッド ３………テープ状光ファイバ心線 ４………スロット ５………止水テープ ６………シース 1 ………… Tension member 2 ………… Slot rod 3 ………… Tape-shaped optical fiber core wire 4 ……… Slot 5 ……… Water-stop tape 6 ……… Sheath
Claims (1)
塗布または含浸させてなる止水テープにおいて、 前記吸水性ポリマーの吸水時における遊離率が30〜60％
であることを特徴とする止水テープ。1. A water-stop tape comprising a base material coated or impregnated with a coating material containing a water-absorbent polymer, wherein the water-absorbent polymer has a release rate of 30 to 60% when absorbing water.
A waterproof tape characterized by being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4094320A JPH05288970A (en) | 1992-04-14 | 1992-04-14 | Water stopping tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4094320A JPH05288970A (en) | 1992-04-14 | 1992-04-14 | Water stopping tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05288970A true JPH05288970A (en) | 1993-11-05 |
Family
ID=14106992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4094320A Pending JPH05288970A (en) | 1992-04-14 | 1992-04-14 | Water stopping tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05288970A (en) |
-
1992
- 1992-04-14 JP JP4094320A patent/JPH05288970A/en active Pending
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| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020205 |