JPH0211690A - Water-barrier material - Google Patents
Water-barrier materialInfo
- Publication number
- JPH0211690A JPH0211690A JP63161902A JP16190288A JPH0211690A JP H0211690 A JPH0211690 A JP H0211690A JP 63161902 A JP63161902 A JP 63161902A JP 16190288 A JP16190288 A JP 16190288A JP H0211690 A JPH0211690 A JP H0211690A
- Authority
- JP
- Japan
- Prior art keywords
- water
- aqueous solution
- tape
- soluble polymer
- running
- 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
- 239000000463 material Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000007864 aqueous solution Substances 0.000 claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 239000013535 sea water Substances 0.000 claims abstract description 18
- 239000000178 monomer Substances 0.000 claims abstract description 9
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 9
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 5
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- -1 sulfoalkyl acrylate Chemical compound 0.000 claims description 13
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 claims 1
- 239000002250 absorbent Substances 0.000 abstract description 22
- 230000002745 absorbent Effects 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 22
- 230000002265 prevention Effects 0.000 abstract description 17
- 229920000642 polymer Polymers 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 abstract 1
- 239000013307 optical fiber Substances 0.000 description 19
- 239000000835 fiber Substances 0.000 description 13
- 239000000843 powder Substances 0.000 description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- 239000002689 soil Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000011049 filling Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- 235000015110 jellies Nutrition 0.000 description 6
- 239000008274 jelly Substances 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- 229940048053 acrylate Drugs 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 229920002972 Acrylic fiber Polymers 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 239000011013 aquamarine Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000003756 stirring 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
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- 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
- PRAMZQXXPOLCIY-UHFFFAOYSA-N 2-(2-methylprop-2-enoyloxy)ethanesulfonic acid Chemical compound CC(=C)C(=O)OCCS(O)(=O)=O PRAMZQXXPOLCIY-UHFFFAOYSA-N 0.000 description 1
- NYUTUWAFOUJLKI-UHFFFAOYSA-N 3-prop-2-enoyloxypropane-1-sulfonic acid Chemical compound OS(=O)(=O)CCCOC(=O)C=C NYUTUWAFOUJLKI-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- DZGUJOWBVDZNNF-UHFFFAOYSA-N azanium;2-methylprop-2-enoate Chemical compound [NH4+].CC(=C)C([O-])=O DZGUJOWBVDZNNF-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は遮水材に関し、さらに詳しくは光フアイバーケ
ーブル内への海水の浸入を防止する遮水材に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water-shielding material, and more particularly to a water-shielding material that prevents seawater from entering into an optical fiber cable.
従来の水走り防止型光ファイバーケーブルの構造は、一
般に第２図に示すように、最中６部にコアとして設けら
れたテンションメンバー６と、その周りに配置されたス
ロット型スペーサー５と、該スロット内に配置された光
フアイバー心線チー１４と、その間隙に水走り防止材料
として充填されたゼリー７と、さらにその周りに順次設
けられた押さえ巻テープ３と、全体を被覆する外被層１
とからなる。As shown in FIG. 2, the structure of a conventional optical fiber cable that prevents water running is generally comprised of a tension member 6 provided as a core at the center 6, a slot-shaped spacer 5 arranged around the tension member 6, and a slot-shaped spacer 5 arranged around the tension member 6. an optical fiber core wire 14 disposed inside, a jelly 7 filled in the gap as a water run-preventing material, a pressing tape 3 sequentially provided around the jelly 7, and an outer covering layer 1 covering the whole.
It consists of.
近年、光フアイバーケーブルは地下に埋設されるケース
が増加しており、従来の充填材料の要求特性、つまり緩
１１性能や充填容易性とともに水走り防止性が重要視さ
れている。In recent years, the number of optical fiber cables being buried underground has increased, and emphasis has been placed on the characteristics required of conventional filling materials, that is, the ability to prevent water run-through as well as ease of filling and ease of filling.
従来、水走りを防止する方法としては、ポリアクリル酸
系またはカルボキシメチルセルロース系等の吸水性ポリ
マー粉末をケーブル内部に充填し、水走り防止を企てる
ことが試みられている。この吸水性ポリマー粉末をケー
ブル内部に充填する方法として、吸水性ポリマー粉末を
直接充填する方法、吸水性ポリマー粉末をワニス等とブ
レンドして紙や布等の支持体に塗布したものを充填する
方法が知られている。吸水性ポリマーを直接充填した場
合は該ポリマー粉末が固定されていないため、ケーブル
を接続する際にポリマー粉末が脱落し易くコネクト作業
性が劣ること、およびケーブルの傾斜、振動等によって
ポリマー粉末がう一−プル内を動く恐れがあり、長期に
わたってケーブル内に均一にポリマー粉末を存在させる
ことが難しいという問題がある。また、吸水性ポリマー
粉末をワニス等とブレンドして支持体に塗布したものは
非水系のワニス等も同時に塗布されるため吸水性が低下
し、水走り防止性が低下するという問題がある。Conventionally, attempts have been made to prevent water running by filling the inside of cables with water-absorbing polymer powder such as polyacrylic acid-based or carboxymethyl cellulose-based polymers. Methods for filling the inside of the cable with this water-absorbing polymer powder include a method of directly filling the water-absorbing polymer powder, and a method of blending the water-absorbing polymer powder with varnish etc. and applying it to a support such as paper or cloth. It has been known. If water-absorbing polymer is directly filled, the polymer powder is not fixed, so the polymer powder tends to fall off when connecting cables, resulting in poor connection workability, and the polymer powder may become eroded due to tilting of the cable, vibration, etc. There is a problem that the polymer powder may move within the cable, making it difficult to maintain uniformity of the polymer powder within the cable over a long period of time. Furthermore, when a water-absorbing polymer powder is blended with a varnish or the like and applied to a support, a non-aqueous varnish or the like is also applied at the same time, resulting in a decrease in water absorption and a decrease in water running prevention properties.
また、特開昭５９−２３４０７号公報には高吸水ポリマ
ーを充填した水溶性パイプを用いる方法が報告されてい
る。しかしながら、この水溶性パイプは柔軟性に乏しく
、光フアイバーケーブル作成時および施工時に水溶性パ
イプにしわが入ったり、ひびが入ったりするため作業性
が悪いという問題がある。Furthermore, Japanese Patent Application Laid-Open No. 59-23407 reports a method using a water-soluble pipe filled with a superabsorbent polymer. However, this water-soluble pipe has a problem of poor flexibility, and the water-soluble pipe is wrinkled or cracked during the production and installation of optical fiber cables, resulting in poor workability.
また、特開昭５２−１５５２１８号公報にはセルロース
系の高吸水繊維が報告されている。しかしながら、この
セルロース系高吸水繊維は被ｒｊ、緩１は効果は優れて
いるが、水に濡れた状態では短期間で腐敗を生じ、炭酸
ガス、水素ガス等を発生して分解し、水走り防止性が失
われてしまい、さらに繊維の特性としてポリマーと比較
して流動性が少ないため、微小間隙、例えば第２図の心
線テープ４の間隙等に対しての水走り防止性が不足して
いる。Further, JP-A-52-155218 reports a cellulose-based super absorbent fiber. However, although this cellulose-based superabsorbent fiber has excellent effects in RJ and RJ, it rots in a short period of time when wet with water, and decomposes by producing carbon dioxide gas, hydrogen gas, etc. In addition, since the fibers have less fluidity than polymers, they lack the ability to prevent water from running into minute gaps, such as the gap between the cord tapes 4 in Figure 2. ing.
また、特開昭６２−１５３１８号公報にはアクリル系高
吸水繊維が報告されているが、セルロース系高吸水繊維
と同様に、繊維の特性としてポリマーと比較して流動性
が少ないため、微小間隙に対しての水走り防止性が不足
している。In addition, acrylic superabsorbent fibers have been reported in JP-A-62-15318, but like cellulose superabsorbent fibers, the fibers have less fluidity compared to polymers, so they have small gaps. It lacks water running prevention properties.
さらに、以上に述べてきた方法はすべて純水に対して報
告されているものであり、海水等の金属塩を含んだ水に
対しては水走り防止性は大幅に低下し、いずれも不充分
である。海水に対して水走り防止性が良好なものとして
は、ケーブルの充填材料としてベトラム系やポリブテン
系のゼリーを用いる方法が行なわれている。しかし、該
ゼリーは水走り防止性は優れているが、他の面で多く問
題を有している。すなわち、ケーブル同士を接続する際
のコネクト作業性が劣ること、極低温でのマイクロベン
ディングによりロスが増加する等である。Furthermore, all of the methods described above have been reported for pure water, and their anti-water running properties are significantly reduced for water containing metal salts such as seawater, and all methods are insufficient. It is. As a method that has good water running prevention properties against seawater, a method of using vetram-based or polybutene-based jelly as a filling material for the cable has been used. However, although this jelly is excellent in preventing water running, it has many problems in other aspects. That is, the connection workability when connecting cables to each other is poor, and the loss increases due to microbending at extremely low temperatures.
従来の光フアイバーケーブルにおいて、海水に対する水
走り防止性、被ｒｉ緩所性、非腐敗性、微小間隙に対し
ての水走り防止性、ケーブル作成時の容易性等をあわせ
持った光ファイバーケーブル用水走り防止材はまだ報告
されていない。In conventional optical fiber cables, water running for optical fiber cables has the following properties: water running prevention against seawater, resistance to ri, non-corrosion, water running prevention against minute gaps, ease of cable creation, etc. Preventive materials have not yet been reported.
本発明の目的は、特に海水に対する水走り防止性、被ｒ
ｉ緩衝性等に優れ、微小間隙に対しての水走り防止性、
ケーブルコネクト作業時およびケーブル製造時のケーブ
ル成形性に優れた、光ファイバーケーブル用水走り防止
材としての遮水材を提供することにある。The purpose of the present invention is to prevent water running in seawater,
i Excellent buffering properties, prevents water from running into minute gaps,
An object of the present invention is to provide a water-shielding material that is excellent in cable formability during cable connection work and cable manufacturing and is used as a water-running prevention material for optical fiber cables.
本発明者らは、前記問題点を解決する手段として、被覆
緩衝性に優れた素材に海水に対して高吸水性を示す高吸
水体を、支持体に安定した状態に保持させ、かつ水に接
触したときは速やかに膨潤し、遮水するように配置する
方法を検討した。As a means to solve the above-mentioned problems, the present inventors have made a support material hold a super absorbent material that exhibits high water absorbency against seawater in a coated material with excellent cushioning properties, and have the material absorb water easily. We considered a method of arranging the material so that it swells quickly upon contact and blocks water.
その結果、単量体として、スルホアルキルアクリレート
、スルホアルキルメタアクリレート、アクリルアミドお
よびメタアクリルアミドからなる群より選ばれた１種ま
たは２種以上の単量体を重合してなる水溶性重合体およ
び架橋剤を含む水溶液を、吸水体の固形分として重量比
で２〜２００ｗｔ％支持体に保持した後、加熱して水溶
性重合体を架橋不溶化させることによりこの目的を達成
できることを見出し、本発明を完成した。As a result, a water-soluble polymer and a crosslinking agent obtained by polymerizing one or more monomers selected from the group consisting of sulfoalkyl acrylate, sulfoalkyl methacrylate, acrylamide, and methacrylamide are obtained. It was discovered that this objective could be achieved by holding an aqueous solution containing 2 to 200 wt % of the solid content of the water absorbent on a support and then heating it to crosslink and insolubilize the water-soluble polymer, thereby completing the present invention. did.
すなわち本発明は、単量体として、スルホアルキルアク
リレート、スルホアルキルメタアクリレート、アクリル
アミドおよびメタアクリルアミドからなる群より選ばれ
た１種または２種以上の単量体を重合して得られる水溶
性重合体に、架橋剤を混合した水溶液を、支持体に吸水
体の固形分として重量比で２〜２００ｗｔ％保持させた
後、加熱することにより水溶性重合体を架橋不溶化した
膜を有し、刻設がＣＢ法で吸水倍率で１ｇ当たり１０ｇ
以上の海水を吸う吸水体であることを特徴とする、海水
に対する水走り防止性に優れた遮水材に関する。That is, the present invention provides a water-soluble polymer obtained by polymerizing one or more monomers selected from the group consisting of sulfoalkyl acrylate, sulfoalkyl methacrylate, acrylamide, and methacrylamide. After holding an aqueous solution mixed with a cross-linking agent in a support body at a weight ratio of 2 to 200 wt% as the solid content of the water-absorbing body, the film has a membrane in which the water-soluble polymer is cross-linked and insolubilized by heating. The water absorption rate is 10g per 1g using the CB method.
The present invention relates to a water-shielding material that is characterized by being a water-absorbing body that absorbs seawater and is excellent in preventing water from running against seawater.
ここで水走り防止性とは、例えば第１図、第２図に見ら
れるような光フアイバーケーブルにおいて、何らかの形
で外被が破られ水が浸入した場合、ケーブルの長平方向
に伝わろうとする水を瞬時のうちに吸水膨潤し遮水する
性能をいう。水走り防止性は遮水性能を表わし、ここで
は２４時間で水が何龍伝播するかを数値化したもので表
わし、この値が小さいほど水走り防止性がよいことを示
す。Here, water running prevention property refers to, for example, in an optical fiber cable as shown in Figures 1 and 2, if the outer sheath is somehow broken and water infiltrates, water that tries to travel in the longitudinal direction of the cable will be prevented. The ability to instantly absorb water, swell, and block water. The water running prevention property represents the water blocking performance, and here it is expressed as a numerical value of how much water spreads in 24 hours, and the smaller this value is, the better the water running prevention property is.
被フ緩衝性とは、ケーブルに対する外力から通信ケーブ
ル心線を保護する外力緩和効果をいう。Cushionability refers to the external force mitigation effect that protects the communication cable core from external forces applied to the cable.
本発明において吸水体は、水走り防止性の点から後述の
ＣＢ法で測定した水膨潤度が１０倍以上であることが好
ましい。また、高吸水体の保持率は２〜２００ｗｔ％が
好ましい。保持率が小さすぎると、水走り防止性が得ら
れに＜＜、また多すぎると吸水体を安定した形で固定す
ることが難しくなる。In the present invention, the water absorbent material preferably has a water swelling degree of 10 times or more as measured by the CB method described below from the viewpoint of preventing water running. Further, the retention rate of the super absorbent material is preferably 2 to 200 wt%. If the retention rate is too low, it will be difficult to prevent water running, and if it is too high, it will be difficult to fix the water absorbent in a stable manner.
本発明に使用できる単量体としては、スルホアルキルア
クリレート、スルホアルキルメタアルキレート、アクリ
ルアミドおよびメタアクリルアミドから選ばれた１種以
上である。これらの単量体は、必要に応じてポリビニー
ルアルコール等のポリマーを含有していてもよい。さら
にこれらの単量体にアクリル酸、メタクリル酸、または
これらのアルカリ金属塩、アンモニウム塩を併用するこ
とにより初期の吸水速度を上げることができる。The monomer that can be used in the present invention is one or more selected from sulfoalkyl acrylate, sulfoalkylmethalkylate, acrylamide, and methacrylamide. These monomers may contain a polymer such as polyvinyl alcohol, if necessary. Furthermore, the initial water absorption rate can be increased by using acrylic acid, methacrylic acid, or an alkali metal salt or ammonium salt thereof in combination with these monomers.
但しアクリル酸およびメタクリル酸系の吸水体は一般に
純水に対する吸水性は優れているが、海水等の金属塩を
含む水に対する吸水性は大幅に低下する。したがって、
本発明の吸水体に併用できるアクリル酸およびメタクリ
ル酸系の単量体の量は重量％で４０％以下が好ましい。However, although acrylic acid and methacrylic acid-based water absorbers generally have excellent water absorption properties for pure water, their water absorption properties for water containing metal salts such as seawater are significantly reduced. therefore,
The amount of acrylic acid and methacrylic acid monomers that can be used in combination with the water absorbent of the present invention is preferably 40% or less by weight.
本発明の遮水材が保持される支持体としては、繊維状構
造体、フィルム等があげられる。繊維状構造体とは、長
繊維および／または単繊維の織物、編物、湿式不織布、
乾式不織布、スパンボンド不織布、紙、糸等をいう。支
持体に用いる素材は特に制限はないが、光フアイバーケ
ーブルの場合は、腐敗により水素ガスのでない素材が好
ましく、例えばアクリル系合成繊維、ポリエステル系合
成繊維、ポリプロピレン系合成繊維等があげられる。Examples of the support on which the water-blocking material of the present invention is held include fibrous structures, films, and the like. Fibrous structures include long fiber and/or single fiber woven fabrics, knitted fabrics, wet-laid nonwoven fabrics,
Refers to dry-processed nonwoven fabrics, spunbond nonwoven fabrics, paper, thread, etc. The material used for the support is not particularly limited, but in the case of optical fiber cables, materials that do not emit hydrogen gas due to decomposition are preferred, such as acrylic synthetic fibers, polyester synthetic fibers, polypropylene synthetic fibers, and the like.
また、特開昭６２−１５３１８号公報に記載されている
アクリル系高吸水繊維を用いると繊維自身の吸水性が加
わるために、水走り防止性が一段と向上し、さらにこの
繊維はＬＯＩ値が３２と優れた難燃性を持っており、難
燃ケーブルの作成にも適しており好ましい。ここでＬＯ
ｒ値とは限界酸素指数のことで、連続して燃焼するため
に最低限必要な濃度（％）であり、この値が大きいほど
難燃性が高い。Furthermore, when the acrylic superabsorbent fiber described in JP-A No. 62-15318 is used, the water absorbency of the fiber itself is added, further improving the water running prevention property, and furthermore, this fiber has an LOI value of 32. It has excellent flame retardancy and is suitable and preferred for making flame-retardant cables. LO here
The r value is the limiting oxygen index, which is the minimum concentration (%) required for continuous combustion, and the larger the value, the higher the flame retardancy.
本発明の遮水材を支持体に保持させる方法としては、例
えば支持体がフィルム状、シート状の布帛、不織布等の
構造物である場合は、前記構造物を浸漬後、マングルで
絞液する方法、糸条の場合は、織物の糊付整経に準じる
方法、１本糊付（例えばユニサイザー１梶製作所（株）
の商品名）による方法等により本発明の遮水材を得るこ
とができる。As a method for holding the water-blocking material of the present invention on a support, for example, when the support is a structure such as a film, a sheet-like cloth, or a nonwoven fabric, the structure is soaked and then squeezed with a mangle. In the case of threads, a method similar to the warping with sizing of textiles, one sizing (for example, Unisizer 1 Kaji Seisakusho Co., Ltd.)
The water-shielding material of the present invention can be obtained by a method such as that of (trade name).
本発明をケーブルに通用して水走り防止性を得るには、
水の浸入とともに水走り防止材全体が瞬時のうちに吸水
膨潤し、水はそれ以上浸入しないことが必要である。水
走り防止効果は、高吸水体の吸水倍率、高吸水体の支持
体への保持率、光フアイバーケーブルへの遮水材の詰込
密度に関連する。高吸水体の吸水倍率と支持体への保持
率は高いほど水走り防止効果がよく、（Ａ）吸水倍率（
ｇ／ｇ）と（Ｂ）保持率（重層％）との積（Ａ）×（Ｂ
）が１５０以上、好ましくは２００以上がよい。In order to apply the present invention to cables and obtain water running prevention properties,
It is necessary that the entire water running prevention material instantly absorbs water and swells when water enters, and water does not enter any further. The water running prevention effect is related to the water absorption capacity of the super absorbent material, the retention rate of the super water absorbent material to the support, and the packing density of the water blocking material into the optical fiber cable. The higher the water absorption capacity of the super absorbent material and the retention rate on the support, the better the water running prevention effect, and (A) water absorption capacity (
g/g) and (B) retention rate (overlayer %) (A) x (B
) is 150 or more, preferably 200 or more.
本発明の遮水材を用いた好ましい一例を光フアイバーケ
ーブルの場合を例にして第１図により説明する。A preferred example of using the water-shielding material of the present invention will be described with reference to FIG. 1, taking the case of an optical fiber cable as an example.
第１図は、本発明の遮水材を適用したスロソトタイプの
光フアイバーケーブルの断面図で、最中６部にコアとし
てのテンションメンバー６が設けられ、その周りにスロ
ット５Ａを有するスペーサー５が設置され、該スロット
５Ａに光フアイバー心線テープ４が配置されており、そ
の周りに本発明による遮水材の押さえ巻テープ２があり
、さらに全体が外被層１で包み込まれたものからなる。FIG. 1 is a sectional view of a surosoto type optical fiber cable to which the water shielding material of the present invention is applied, in which a tension member 6 as a core is provided at the middle 6 part, and a spacer 5 having a slot 5A is installed around it. An optical fiber core tape 4 is disposed in the slot 5A, a water-shielding tape 2 of the present invention is placed around it, and the entire body is further wrapped with an outer covering layer 1.
このような構成の光フアイバーケーブルによれば、外被
１にクラックが生じて水が浸入してきても、浸入してき
た水により押さえ巻テープ２に保持されている高吸水体
が水を吸収することにより瞬時に吸水膨潤し、スロット
内に押出されて微小間隙に達し、水の浸入をわずかにと
どめ、さらにそれ以上の浸入を長期間にわたって防ぐこ
とができる。According to the optical fiber cable having such a configuration, even if a crack occurs in the outer sheath 1 and water infiltrates, the super water absorbent material held by the pressure wrapping tape 2 absorbs the water by the infiltrating water. The material instantly absorbs water and swells, is pushed into the slot, and reaches the microscopic gap, allowing only a small amount of water to enter, and further preventing further entry for a long period of time.
以下、本発明を実施例により、本発明を具体的に説明す
る。なお、実施例中の％はすべて重量％である。Hereinafter, the present invention will be specifically explained with reference to Examples. Note that all percentages in the examples are percentages by weight.
本実施例に用いられる特性の測定方法は次のとおりであ
る。The method of measuring characteristics used in this example is as follows.
吸水性：
イ）ＣＢ法
ポリエステルネットに入れた試料を２０℃の水中に一定
時間’ＩＮ ？Ｍし、空中に１０分間吊した後、遠心脱
水機にて１００ＯＧの力で１分間脱水を行なった後、試
料をネットより取出し、重量を測定する。このときのＭ
ＮをＡとし次式により吸水倍率を求める。Water absorption: a) CB method A sample placed in a polyester net is immersed in water at 20°C for a certain period of time. After hanging in the air for 10 minutes, the sample was dehydrated for 1 minute at a force of 100 OG using a centrifugal dehydrator, and then the sample was taken out from the net and its weight was measured. M at this time
Assuming that N is A, the water absorption capacity is determined by the following formula.
し
Ｃ：８０’Ｃに調整した熱風乾燥器中で重量変化のなく
なるまで乾燥した後の重量。C: Weight after drying in a hot air dryer adjusted to 80'C until there is no change in weight.
腐敗テスト：
第３図に示す容器１２にテストサンプル１４を４ｇ入れ
、以下に述べる土壌抽出液１３を２００ｃｃ入れて混合
し、３０℃で日陰に保存し、３０日後に容器のコック１
０を開き、空気の部分から２〜４ ｃｃの空気を抜取り
、ガスクロマトグラフで発生ガスを分析するとともに、
肉眼で溶液の色や状態を調べる。Putrefaction test: Put 4g of the test sample 14 into the container 12 shown in Fig. 3, add 200cc of the soil extract 13 described below, mix, store in the shade at 30°C, and after 30 days remove the stopper 1 of the container.
0 is opened, 2 to 4 cc of air is extracted from the air section, and the generated gas is analyzed using a gas chromatograph.
Check the color and condition of the solution with the naked eye.
土壌抽出液の作成は以下のように行なう。The soil extract is prepared as follows.
（１）土は落葉などあり、草のはえいてるところから採
取する。(1) Collect soil from areas where there are fallen leaves and grass growing.
（２）５００ｇの土を２０００ ｃｃの純水に混ぜて攪
拌する。(2) Mix 500 g of soil with 2000 cc of pure water and stir.
（３）１２時間放置後上ずみ液を濾過し、濾過液５０ｃ
ｃに純水１５０ｃｃを加え土壌抽出液とする。(3) After leaving for 12 hours, filter the supernatant and 50c of the filtrate.
Add 150 cc of pure water to c to obtain a soil extract.
（４）土および土壌抽出液は試験のハツチ毎に新しく採
取、抽出する。(4) Soil and soil extract should be freshly collected and extracted for each test hatch.
本発明において合成高分子化合物からなる支持体を本発
明の高吸水体で処理した遮水材は、後述するＣＢ法によ
る吸水倍率がｉｏ（ｇ以上であり、特に１５倍以上であ
ることが望ましい。In the present invention, the water-blocking material in which a support made of a synthetic polymer compound is treated with the superabsorbent material of the present invention has a water absorption capacity of io(g or more, particularly preferably 15 times or more) according to the CB method described below. .
実施例１
アクリル酸ソーダ４００ｇ、アクリルアミド６００ｇを
水１０Ｋｇに溶解し、過硫酸アンモニウム１０ｇ、亜硫
酸アンモニウム２０ｇを１００ｇの水に熔解して上記水
溶液に加え、６０℃で２時間重合した。得られた水溶液
に２５％グルタルアルデヒド水溶液を３％加え吸水体水
溶液入を得た。Example 1 400 g of sodium acrylate and 600 g of acrylamide were dissolved in 10 kg of water, and 10 g of ammonium persulfate and 20 g of ammonium sulfite were dissolved in 100 g of water and added to the above aqueous solution, followed by polymerization at 60° C. for 2 hours. 3% of 25% glutaraldehyde aqueous solution was added to the obtained aqueous solution to obtain a water absorbent aqueous solution.
吸水体水溶液Ａをガラス板上におとし１００°Ｃで３０
分乾燥した後、さらに１３０℃で３時間加熱して得られ
たフィルムを人工海水（アクアマリン二へ州薬品（株）
の商品名）でのＣＢ法による吸水倍率を測定したところ
２１倍であった。Water absorbent aqueous solution A was placed on a glass plate and heated at 100°C for 30 minutes.
After drying for 3 minutes, the film was further heated at 130°C for 3 hours and the resulting film was washed with artificial seawater (Aquamarine Niheshu Yakuhin Co., Ltd.).
When the water absorption capacity of the product (trade name) was measured by the CB method, it was 21 times.
このようにして得られた吸水体水溶液Ａ中に、カシミロ
ンＦＫ（旭化成工業（株）社製アクリル系繊維の商品名
）３ｄＸ７６ｍｍ、９０％にメルチイー（ユニチカ（株
）社製ポリエステル熱融着繊維の商品名）３ｄｘ７６龍
、１０％をカードで８０ ｇ ／ ｒｄのつＪ−７ブを
作成した後、１３０℃に加熱されたプレスロールで３
ｋｇ ／ ｎ（の圧力で１０ｍ／ ｍ ｉ ｎの速度で
加熱プレスを行ない、得られた乾熱不織布を浸漬した後
、水溶液の付着率が１５０％になるようにマングルで絞
液した後、１００°Ｃで５分乾燥し、さらに１３０°Ｃ
で３時間加熱した。得られたシート状の遮水材を２．５
ｃｍ幅にスリットし、本発明の遮水材としての押さえ
巻きテープＢを得た。なお、この押さえ巻きテープに用
いた高吸水体の保持率と吸水倍率の積は１６（％）Ｘ２
１ （倍）＝３３６である。In the water absorbent aqueous solution A obtained in this manner, 90% of Cashmilon FK (trade name of acrylic fiber manufactured by Asahi Kasei Industries, Ltd.) 3dX76 mm and 90% of Melchie (polyester heat-sealable fiber manufactured by Unitika Corporation) were added. Product name) 3dx76 Dragon, 80g/rd J-7 was made with 10% card, and then rolled with a press roll heated to 130℃.
After hot pressing at a speed of 10 m/min at a pressure of 100 kg/n, the obtained dry heat nonwoven fabric was immersed and squeezed with a mangle so that the adhesion rate of the aqueous solution was 150%. Dry for 5 minutes at °C, then 130 °C.
It was heated for 3 hours. The obtained sheet-like waterproof material was 2.5
The tape was slit to a width of cm to obtain pressure-wrapping tape B as a water-blocking material of the present invention. In addition, the product of the retention rate and water absorption capacity of the super absorbent material used for this pressure-wrapping tape is 16 (%) x 2
1 (times)=336.
次に、吸水体水溶液Ａを厚さ４０μｍのポリエステルフ
ィルムの両面に、片面の厚さが３０μｍになるようにコ
ーティングした後乾燥した。コーティングされたフィル
ムを幅１．３ ＊＊にスリットしスロット用遮水テープ
を得た。Next, water absorbent aqueous solution A was coated on both sides of a 40 μm thick polyester film so that one side had a thickness of 30 μm, and then dried. The coated film was slit into a width of 1.3** to obtain a water-blocking tape for slots.
次に、直径１．５ ｃｍ、長さ１ｍのポリエチレン製の
１８に、幅１．２ｕ＋、深さ１．５ ａｍの溝をＩ屈っ
たものに、厚さ４００μｍ、幅１．４ ｍｍの心線テー
プを入れその上にスロット用遮水テープを入れさらにそ
の上に心線テープを入れる。全体を、押さえ巻きテープ
Ｂで心線テープの表面が出ないように螺旋状に巻き付け
、さらにその上を透明のビニールテープで巻き、片方の
端からゴム管を通して１ｍＨ２Ｏの水圧で人工海水を流
し、２４時間後の水走り長さを調べたところ、水走り長
さは１．８ｃｎａで良好な結果が得られた。Next, a polyethylene 18 with a diameter of 1.5 cm and a length of 1 m was cut into a groove with a width of 1.2 u+ and a depth of 1.5 am. Put the core tape, put the water-blocking tape for the slot on top of it, and then put the core tape on top of it. The whole was wrapped spirally with pressure-wrapping tape B so that the surface of the core tape did not show, and then wrapped with transparent vinyl tape, and artificial seawater was passed through a rubber tube from one end at a water pressure of 1 mH2O. When the water running length was examined after 24 hours, the water running length was 1.8 cna, which was a good result.
このように本発明の遮水材は優れた水走り防止性を示す
。またこ押さえ巻きテープは、触感による風合いは柔ら
かく、ケーブルコネクト作業性、被覆緩衝性共良好であ
ると考えられる。なお、この押さえ巻きテープ、スロッ
ト用遮水テープは腐敗テストによる水素ガスの発生は認
められなかった。As described above, the water-blocking material of the present invention exhibits excellent water running prevention properties. Further, the pressure-wrapped tape has a soft feel to the touch, and is considered to have good cable connection workability and covering cushioning properties. It should be noted that no hydrogen gas was observed to be generated by this pressure-wrapping tape and water-blocking tape for slots in a decomposition test.
実施例２
メタクリル酸アンモニウム５０ｇ、メタクリルアミド３
００ｇ、アクリル酸１００ｇ、スルホエチルメククリレ
ートのナトリウム塩２５０ｇを水１０ｋｇに熔解し、過
硫酸アンモニウム１５ｇを水ＬＯＯｇに溶解し、上記水
溶液に加え、６５℃で３時間重合した。この水溶液を攪
拌しなからテトラメチルエチレンジアミン１０ｇを加え
吸水体水溶液Ｃを得た。得られた水溶液Ｃをガラス板上
におとし１００°Ｃで３０分乾燥した後、さらに１３０
°Ｃで３時間加熱して得られたフィルムを人工海水（ア
クアマリン二へ洲薬品−の商品名）でのＣＢ法による吸
水倍率を測定したところ２７倍であった。Example 2 Ammonium methacrylate 50g, methacrylamide 3
00g of acrylic acid, 100g of acrylic acid, and 250g of sodium salt of sulfoethyl meccrylate were dissolved in 10kg of water, and 15g of ammonium persulfate was dissolved in LOOg of water, added to the above aqueous solution, and polymerized at 65°C for 3 hours. While stirring this aqueous solution, 10 g of tetramethylethylenediamine was added to obtain a water absorbent aqueous solution C. The obtained aqueous solution C was placed on a glass plate, dried at 100°C for 30 minutes, and further dried at 130°C.
The water absorption capacity of the film obtained by heating at °C for 3 hours was measured by the CB method in artificial seawater (trade name of Aquamarine Nihesu Pharmaceutical) and found to be 27 times.
このようにして得られた吸水体水溶液Ｃ中に、カシミロ
ンＦＫ（旭化成工業側社製アクリル系繊維）３ｄＸ７６
曹鳳、９０％にメルチイー（ユニチカ■社製ポリエステ
ル熱融着繊維）３ｄＸ７６ｍｍ、１０％をカードで８０
ｇ／ｍのウェッブを作成した後、１３０°Ｃに加熱さ
れたプレスロールで３ ｋｇ／ｒｌ（の圧力で１０ｍ／
ｍｉｎの速度で加熱プレスを行い得られた乾熱不織布を
浸漬した後、水冷液の付着率が１５０％になるようにマ
ングルで絞液した後１００℃で５分乾燥し、さらに１３
０℃で３時間加熱した。得られたシート状の遮水材を２
．５ｃＩ１１＠にスリンｌ−Ｌ本発明の遮水材としての
押さえ巻きテープＤを得た。In the water absorbent aqueous solution C thus obtained, Cashmilon FK (acrylic fiber manufactured by Asahi Kasei Industries) 3dX76
Cao Feng, 90% Melchii (polyester heat-adhesive fiber manufactured by Unitika) 3dX76mm, 10% card 80
After creating a web of 10 m/m at a pressure of 3 kg/rl using a press roll heated to 130°C.
The dry heat nonwoven fabric obtained by hot pressing at a speed of 1.5 min was immersed, and the water was squeezed with a mangle so that the adhesion rate of the water cooling liquid was 150%, and then dried at 100 ° C. for 5 minutes, and then dried for 5 minutes at 100 ° C.
Heated at 0°C for 3 hours. The obtained sheet-shaped waterproof material was
．． 5cI11@ Surin l-L Pressure-wrapping tape D as a water-blocking material of the present invention was obtained.
なお、この押さえ巻きテープに用いた高吸水体の保持率
と吸水倍率の積は１６ （％）Ｘ２７（倍）＝４３２で
ある。Note that the product of the retention rate and water absorption capacity of the super water absorbent material used in this pressure-wrapping tape is 16 (%) x 27 (times) = 432.
つぎに、吸水体水溶液Ｃを厚さ４０μｍのポリエステル
フィルムの両面に、片面の厚さが３０μｍになるように
コーティングした後乾燥したコーティングされたフィル
ムを幅１．３龍にスリットしスロット用遮水テープを得
た。Next, water absorbent aqueous solution C was coated on both sides of a polyester film with a thickness of 40 μm so that the thickness of one side was 30 μm, and the dried coated film was slit into a width of 1.3 mm to form a water-blocking slot. Got the tape.
次に、直径１．５ ａｍ、長さ１ｍのポリエチレン製の
棒に、幅１．２ ｍｌ、深さ１．６ 鰭の溝を掘ったも
のに、厚さ４００μｍ幅１．４ ｉ＋ａの心線テープを
入れその上にスロット用遮水テープを入れ、さらにその
上に心線テープを入れる。全体を、押さえ巻きテープＤ
で心線テープの表面が出ないように螺旋状に巻き付け、
さらにその上を透明のビニールテープで巻き片方の端か
らゴム管をとうして１ｍＨ２Ｏの水圧で人工海水を流し
、２４時間後の水走り長さを調べたところ、水走り長さ
は２２ｃｍで良好な結果が得られた、
このように本発明の遮水材は優れた水走り防止性竺、ス
す。またこの押さえ巻きテープは、触感による風合いは
柔かく、ケーブルコネクト作業性、被覆緩衝性共良好で
あると考えられる。なお この押さえ巻きテープ、スロ
ット用遮水テープは腐敗テストによる水素ガスの発生は
認められなかった。Next, a polyethylene rod with a diameter of 1.5 am and a length of 1 m was cut with a fin groove of 1.2 ml in width and 1.6 in depth, and a core wire with a thickness of 400 μm and a width of 1.4 i + a was cut into it. Put the tape, put the water-blocking tape for the slot on top of it, and then put the core tape on top of it. Press down and wrap the whole thing with tape D
Wrap the core tape in a spiral so that the surface of the tape is not exposed.
Furthermore, we wrapped a transparent vinyl tape over it, took a rubber tube from one end, and poured artificial seawater at a water pressure of 1mH2O.When we checked the running length of the water after 24 hours, the running length of the water was 22cm, which was good. As can be seen, the water-blocking material of the present invention has excellent water run-in prevention properties. In addition, this pressure-wrapping tape has a soft feel to the touch, and is considered to have good cable connection workability and covering cushioning properties. In addition, no hydrogen gas was observed to be generated by this pressure-wrapping tape and slot water-shielding tape in a decomposition test.
実施例３
スルホエチルメタクリレートに替えてスルホプロピルア
クリレートを用いる以外は実施例２と同様に行った。そ
、の結果高吸水体水溶液から得られたフィルムの人工海
水でのＣＢ法による吸水倍率を測定したところ２４倍で
あり、１ｍＨ２Ｏの水圧で人工海水を流し、２４時間後
の水走り長さを調べたところ、水走り長さは２５ｃｍで
良好な結果が得られた。なお、この押さえ巻きテープ、
スロット用遮水テープは腐敗テストによる水素ガスの発
生は認められなかった。Example 3 The same procedure as Example 2 was carried out except that sulfopropyl acrylate was used in place of sulfoethyl methacrylate. As a result, the water absorption capacity of the film obtained from the super water absorbent aqueous solution was measured using the CB method in artificial seawater, and it was found to be 24 times. Upon investigation, good results were obtained with a running length of 25 cm. In addition, this pressure-wrapping tape,
No generation of hydrogen gas was observed in the water-shielding tape for slots during a decomposition test.
本発明によれば、海水に対する水走り防止性、ケーブル
同士を接続する際のコネクト作業性等に優れた、光フア
イバーケーブル用の遮水材を提供することができる。According to the present invention, it is possible to provide a water-shielding material for optical fiber cables, which is excellent in preventing seawater from running in water and in connection workability when connecting cables to each other.
第１図は、本発明の適用例を示すスロットタイプの水走
り防止型光ファイバーケーブルの拡大断面図、第２図は
、本発明の他の通用例を示すスロットタイプのゼリー充
填式水走り防止型光ファイバーケーブルの拡大断面図、
第３図は、腐敗テスト用装置を示す側面図である。
１・・・外被、２・・・本発明の押さえ巻テープ、３・
・・押さえ巻テープ、４・・・光フアイバー心線テープ
、５・・・スロット型スペーサー、５Ａ・・・スロット
、６・・・テンションメンバー、７・・・ゼリー １０
・・・コック、１２・・・ガラス製三角フラスコ、１３
・・・土壌抽出液、１４・・・テストサンプル。
代理人 弁理士 川 北 武 長FIG. 1 is an enlarged cross-sectional view of a slot-type optical fiber cable that shows an application example of the present invention, and FIG. 2 shows a slot-type jelly-filled water run-prevention type that shows another application example of the present invention. Enlarged cross-sectional view of optical fiber cable,
FIG. 3 is a side view of the rot test device. DESCRIPTION OF SYMBOLS 1... Outer covering, 2... Pressure wrapping tape of the present invention, 3.
... Pressing tape, 4... Optical fiber core tape, 5... Slot type spacer, 5A... Slot, 6... Tension member, 7... Jelly 10
...cock, 12...glass Erlenmeyer flask, 13
...Soil extract, 14...Test sample. Agent Patent Attorney Takeshi Kawakita
Claims (1)
ルホアルキルメタアクリレート、アクリルアミドおよび
メタアクリルアミドからなる群より選ばれた１種または
２種以上の単量体を重合して得られる水溶性重合体に、
架橋剤を混合した水溶液を、支持体に吸水体の固形分と
して重量比で２〜２００ｗｔ％保持させた後、加熱する
ことにより水溶性重合体を架橋不溶化した膜を有し、刻
設がＣＢ法で吸水倍率で１ｇ当たり１０ｇ以上の海水を
吸う吸水体であることを特徴とする、海水に対する水走
り防止性に優れた遮水材。(1) A water-soluble polymer obtained by polymerizing one or more monomers selected from the group consisting of sulfoalkyl acrylate, sulfoalkyl methacrylate, acrylamide, and methacrylamide as a monomer,
An aqueous solution mixed with a crosslinking agent is held in the support by 2 to 200 wt% as solid content of the water absorber, and then heated to crosslink and insolubilize the water-soluble polymer. A water-shielding material that is characterized by being a water-absorbing material that absorbs seawater at a water absorption rate of 10g or more per 1g according to the law, and has excellent water-blocking properties against seawater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161902A JP2698381B2 (en) | 1988-06-29 | 1988-06-29 | Fiber optic cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161902A JP2698381B2 (en) | 1988-06-29 | 1988-06-29 | Fiber optic cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0211690A true JPH0211690A (en) | 1990-01-16 |
| JP2698381B2 JP2698381B2 (en) | 1998-01-19 |
Family
ID=15744189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63161902A Expired - Fee Related JP2698381B2 (en) | 1988-06-29 | 1988-06-29 | Fiber optic cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2698381B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0475778A2 (en) * | 1990-09-14 | 1992-03-18 | Nippon Shokubai Co., Ltd. | Waterproofing agent |
| JPH06287218A (en) * | 1991-10-30 | 1994-10-11 | American Teleph & Telegr Co <Att> | Highly water-absorptive polymer and cable containing it |
| WO2013117946A1 (en) * | 2012-02-10 | 2013-08-15 | H&R Chempharm (Uk) Limited | Method and composition for the in situ formation of a water barrier |
| US10161080B2 (en) * | 2013-03-06 | 2018-12-25 | Carl Freudenberg Kg | Ventilation insert |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884804A (en) * | 1981-11-13 | 1983-05-21 | Kuraray Co Ltd | Water absorbing and retaining material |
| JPS6081229A (en) * | 1983-10-11 | 1985-05-09 | Mitsui Petrochem Ind Ltd | Production of water-swelling crosslinked polymer |
| JPS60150506A (en) * | 1984-01-18 | 1985-08-08 | 日立電線株式会社 | Water feed preventive power cable |
| JPS6131450A (en) * | 1984-07-23 | 1986-02-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | Water-swelling material having salt resistance |
| JPS62249117A (en) * | 1986-04-22 | 1987-10-30 | Toppan Printing Co Ltd | Optical fiber cable |
| JPS62275146A (en) * | 1986-02-07 | 1987-11-30 | Hayashikane Zosen Kk | Aqueous solution of polymer forming water-absorbing coating and coated material |
| JPH01141938A (en) * | 1987-11-30 | 1989-06-02 | Asahi Chem Ind Co Ltd | Highly water-absorptive material |
-
1988
- 1988-06-29 JP JP63161902A patent/JP2698381B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884804A (en) * | 1981-11-13 | 1983-05-21 | Kuraray Co Ltd | Water absorbing and retaining material |
| JPS6081229A (en) * | 1983-10-11 | 1985-05-09 | Mitsui Petrochem Ind Ltd | Production of water-swelling crosslinked polymer |
| JPS60150506A (en) * | 1984-01-18 | 1985-08-08 | 日立電線株式会社 | Water feed preventive power cable |
| JPS6131450A (en) * | 1984-07-23 | 1986-02-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | Water-swelling material having salt resistance |
| JPS62275146A (en) * | 1986-02-07 | 1987-11-30 | Hayashikane Zosen Kk | Aqueous solution of polymer forming water-absorbing coating and coated material |
| JPS62249117A (en) * | 1986-04-22 | 1987-10-30 | Toppan Printing Co Ltd | Optical fiber cable |
| JPH01141938A (en) * | 1987-11-30 | 1989-06-02 | Asahi Chem Ind Co Ltd | Highly water-absorptive material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0475778A2 (en) * | 1990-09-14 | 1992-03-18 | Nippon Shokubai Co., Ltd. | Waterproofing agent |
| JPH06287218A (en) * | 1991-10-30 | 1994-10-11 | American Teleph & Telegr Co <Att> | Highly water-absorptive polymer and cable containing it |
| WO2013117946A1 (en) * | 2012-02-10 | 2013-08-15 | H&R Chempharm (Uk) Limited | Method and composition for the in situ formation of a water barrier |
| US10161080B2 (en) * | 2013-03-06 | 2018-12-25 | Carl Freudenberg Kg | Ventilation insert |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2698381B2 (en) | 1998-01-19 |
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