JP2006327154A - Polyolefin resin pipe - Google Patents

Polyolefin resin pipe Download PDF

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Publication number
JP2006327154A
JP2006327154A JP2005157579A JP2005157579A JP2006327154A JP 2006327154 A JP2006327154 A JP 2006327154A JP 2005157579 A JP2005157579 A JP 2005157579A JP 2005157579 A JP2005157579 A JP 2005157579A JP 2006327154 A JP2006327154 A JP 2006327154A
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polyolefin resin
protective layer
pipe
resin pipe
impregnated
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Yoshihiro Okano
嘉宏 岡野
Toshiyuki Yonezu
利之 米津
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Nippon Chutetsukan KK
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Nippon Chutetsukan KK
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a polyolefin resin pipe having no apprehension causing oxidative deterioration even if used as outdoor exposed piping. <P>SOLUTION: A protective layer 2 having weatherability is provided to the outer surface of a polyolefin resin main pipe 1 and composed of a material obtained by impregnating a porous base material with a compound mainly comprising petrolatum, a material obtained by impregnating the porous base material with a compound mainly comprising an oxidative polymerization-type drying oil or a material obtained by impregnating the porous base material with a polymer aqueous dispersion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、ポリオレフィン樹脂管、特に、ポリエチレン製埋設水道配管に、地中の有機溶剤や油類等の有害物質が浸透することを確実に防止できるポリオレフィン樹脂管に関するものである。   The present invention relates to a polyolefin resin pipe, and more particularly, to a polyolefin resin pipe that can reliably prevent harmful substances such as underground organic solvents and oils from penetrating into a polyethylene buried water pipe.

ポリエチレン、ポリプロピレン等のポリオレフィン樹脂管は、耐食性に優れていること、屈曲性に優れていること、地震時の地盤変位に対して追従できる伸びを有していること等の種々の優れた特徴を有し、ガス配管、給排水配管等の埋設配管に広く使用されている。   Polyolefin resin pipes such as polyethylene and polypropylene have various excellent features such as excellent corrosion resistance, excellent flexibility, and elongation that can follow the ground displacement during an earthquake. It is widely used for buried piping such as gas piping and water supply / drainage piping.

しかしながら、ポリオレフィン樹脂管を屋外露出配管として使用する場合、ポリオレフィン樹脂は、太陽光中の紫外線を触媒として、酸化劣化が生じる懸念がある。   However, when a polyolefin resin pipe is used as an outdoor exposed pipe, there is a concern that the polyolefin resin may be oxidized and deteriorated using ultraviolet rays in sunlight as a catalyst.

従って、この発明の目的は、屋外露出配管として使用しても酸化劣化が生じる懸念がないポリオレフィン樹脂管を提供することにある。   Accordingly, an object of the present invention is to provide a polyolefin resin pipe that is free from the risk of oxidative degradation even when used as an outdoor exposed pipe.

この発明は、上記目的を達成するためになされたものであって、下記を特徴とするものである。   The present invention has been made to achieve the above object, and is characterized by the following.

請求項１に記載の発明は、ポリオレフィン樹脂本管の外面に、耐候性を有する保護層が設けられていることに特徴を有するものである。   The invention described in claim 1 is characterized in that a protective layer having weather resistance is provided on the outer surface of the polyolefin resin main pipe.

請求項２に記載の発明は、請求項１記載の発明において、保護層は、多孔質基材に、ペトロラタムを主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、酸化重合型乾性油を主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、ポリマー水分散液を含浸させた材料であることに特徴を有するものである。   The invention according to claim 2 is the invention according to claim 1, wherein the protective layer is formed by impregnating a porous base material with a compound mainly composed of petrolatum, or oxidative polymerization on the porous base material. It is characterized by being a material impregnated with a compound mainly composed of mold drying oil, or a material in which a porous substrate is impregnated with a polymer aqueous dispersion.

請求項３記載の発明は、請求項１または２記載の発明において、保護層の外面に光遮断のための光遮断層が設けられていることに特徴を有するものである。   The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, a light blocking layer for blocking light is provided on the outer surface of the protective layer.

この発明によれば、屋外露出配管として使用しても酸化劣化が生じる懸念がないポリオレフィン樹脂管を提供することができる。   According to the present invention, it is possible to provide a polyolefin resin pipe that is free from fear of oxidative deterioration even when used as an outdoor exposed pipe.

この発明のポリオレフィン樹脂管の一実施態様を、図面を参照しながら説明する。   One embodiment of the polyolefin resin pipe of the present invention will be described with reference to the drawings.

図１は、この発明のポリオレフィン樹脂管を示す断面図、図２は、直管部にテープ状保護層を巻き付ける方法を示す図であり、（ａ）は、施工前を示す図、（ｂ）は、施工後を示す図、図３は、電気融着継手部にテープ状保護層を巻き付ける方法を示す図であり、（ａ）は、施工前、（ｂ）は、施工準備を示す図、（ｃ）は、施工後を示す図、図４は、この発明の他のポリオレフィン樹脂管を示す断面図である。   FIG. 1 is a cross-sectional view showing a polyolefin resin pipe of the present invention, FIG. 2 is a view showing a method of winding a tape-like protective layer around a straight pipe portion, (a) is a view showing before construction, (b) FIG. 3 is a diagram showing a method after construction, FIG. 3 is a diagram showing a method of winding a tape-shaped protective layer around an electrofusion joint part, (a) is before construction, (b) is a diagram showing construction preparation, (C) is a figure which shows after construction, FIG. 4 is sectional drawing which shows the other polyolefin resin pipe | tube of this invention.

図１に示すように、この発明のポリオレフィン樹脂管は、耐候性を有する保護層２をポリオレフィン樹脂本管１の外面に巻き付けたものからなっている。保護層２を樹脂本管１に巻き付けることによって、紫外線の透過を防止でき且つ酸素の供給を無くすことができるので、屋外露出配管として使用しても酸化劣化が生じる懸念がない。   As shown in FIG. 1, the polyolefin resin pipe of this invention consists of what wound the protective layer 2 which has a weather resistance around the outer surface of the polyolefin resin main pipe 1. By wrapping the protective layer 2 around the resin main pipe 1, it is possible to prevent the transmission of ultraviolet rays and to eliminate the supply of oxygen.

保護層２は、多孔質基材に、ペトロラタムを主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、酸化重合型乾性油を主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、無機充填材を配合したポリマー水分散液からなるコンパウンドを含浸させた材料からなっている。   The protective layer 2 is a material in which a porous substrate is impregnated with a compound mainly composed of petrolatum, or a material in which a porous substrate is impregnated with a compound mainly composed of oxidative polymerization drying oil, or It is made of a material in which a porous substrate is impregnated with a compound composed of a polymer aqueous dispersion containing an inorganic filler.

また、ガス配管、給排水配管等は、長期にわたり使用するため、保護層自体が太陽光の紫外線を触媒として、酸化劣化しない耐候性を有する材料である必要がある。これは、ペトロラタムを主成分としたコンパウンド、酸化重合型乾物油を主成分としたコンパウンド、無機充填材を配合したポリマー水分散液からなるコンパウンドを用いることにより達成できる。   Moreover, since gas piping, water supply / drainage piping, etc. are used over a long period of time, it is necessary that the protective layer itself is a material having weather resistance that does not undergo oxidative degradation using ultraviolet rays of sunlight as a catalyst. This can be achieved by using a compound composed of a compound composed mainly of petrolatum, a compound composed mainly of an oxidation polymerization type dry matter oil, and a polymer aqueous dispersion containing an inorganic filler.

ペトロラタムは、石油から作られ、乾性油は、酸化重合反応することにより、強靭な皮膜を形成する。   Petrolatum is made from petroleum, and drying oil forms a tough film by oxidative polymerization reaction.

ポリマー水分散液のポリマーとしては、アクリル系樹脂、ポリ塩化ビニル、塩化ビニル・酢酸ビニル共重合体、塩化ゴム、塩素化ポリオレフィンやポリエチレン、エチレン・酢酸ビニル共重合体やエチレン・プロピレン共重合体、エチレン・エチルアクリレート共重合体やポリビニルブチラール、ポリブタジエンやエポキシ樹脂、アミノ系樹脂やウレタン系樹脂、シリコーン系樹脂やアルキド系樹脂等が用いられる。   Polymers in the polymer aqueous dispersion include acrylic resin, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, chlorinated rubber, chlorinated polyolefin and polyethylene, ethylene / vinyl acetate copolymer and ethylene / propylene copolymer, An ethylene / ethyl acrylate copolymer, polyvinyl butyral, polybutadiene, epoxy resin, amino resin, urethane resin, silicone resin, alkyd resin, or the like is used.

また、保護層２をポリオレフィン樹脂配管に施工する場合、継手部の凹凸に対応するために、柔軟性のある施工性の良い材料が必要となる。これには、コンパウンドを含浸させる多孔質基材をテープ状のものとすると好適である。   Moreover, when applying the protective layer 2 to polyolefin resin piping, in order to respond | correspond to the unevenness | corrugation of a joint part, a flexible material with sufficient workability is required. For this purpose, it is preferable that the porous substrate impregnated with the compound is in a tape form.

多孔質基材は、コンパウンドを保持する機能を有する。その材料は、特に限定されないが、ポリエステル繊維、ポリアミド繊維、ポリプロピレン繊維の繊維からなる不織布、織布、フェルト等を用いることができる。   The porous substrate has a function of holding the compound. The material is not particularly limited, and non-woven fabrics, woven fabrics, felts, and the like made of polyester fibers, polyamide fibers, and polypropylene fibers can be used.

テープ状保護層２の厚さは、０．１〜１０ｍｍが好適であり、０．５〜３ｍｍが最適であり、巻き付けることにより施工される。このとき、テープ幅の１／１０〜３／４重なり合わすと好適であり、１／３〜１／３が最適である。   0.1-10 mm is suitable for the thickness of the tape-shaped protective layer 2, and 0.5-3 mm is optimal, and it constructs by winding. At this time, it is preferable to overlap 1/10 to 3/4 of the tape width, and 1/3 to 1/3 is optimal.

図２（ｂ）に、図２（ａ）に示すポリオレフィン樹脂本管１の直管部に保護層２を螺旋上に巻き付けた状態を示す。   FIG. 2B shows a state in which the protective layer 2 is spirally wound around the straight pipe portion of the polyolefin resin main pipe 1 shown in FIG.

図３（ａ）に示す電気融着継手３に保護層２を巻き付けるには、継手部の段差をマスチック４の充填により埋め、突出しているターミナル５を電気融着終了後に切断することにより容易に巻きつけることができる。   In order to wrap the protective layer 2 around the electrofusion joint 3 shown in FIG. 3A, the step of the joint is filled with the mastic 4, and the protruding terminal 5 is cut off after the electrofusion is completed. Can be wrapped.

図４に示すように、保護層２の耐久性を向上させるため、保護層２の上に光遮断層６を塗装等の手段により形成すると良い。   As shown in FIG. 4, in order to improve the durability of the protective layer 2, the light blocking layer 6 is preferably formed on the protective layer 2 by means such as painting.

光遮断層６の材料としては、特に限定されないが、ウレタン樹脂系塗料、シリコーン樹脂系塗料、エポキシ樹脂系塗料、アミノ樹脂系塗料、アルキド樹脂系塗料、フェノール樹脂系塗料、ビニル樹脂系塗料、ラテックス系塗料、ゴム系塗料などが用いられる。   The material of the light blocking layer 6 is not particularly limited, but urethane resin paint, silicone resin paint, epoxy resin paint, amino resin paint, alkyd resin paint, phenol resin paint, vinyl resin paint, latex Paints, rubber paints, etc. are used.

光遮断層６の厚さは、１０μｍ〜１ｍｍが好適であり、１５〜１００μｍが最適である。光遮断層６は、保護層２の施工後、塗装等により形成することができる。   The thickness of the light blocking layer 6 is preferably 10 μm to 1 mm, and most preferably 15 to 100 μm. The light blocking layer 6 can be formed by painting or the like after the protective layer 2 is applied.

この発明を実施例によりさらに説明する。   The invention is further illustrated by examples.

呼び径１００のポリエチレン樹脂本管に、保護層を施工した場合の耐久性の結果を表１に示す。促進耐候性試験は、ＪＩＳＫ７３５０−４に従って実施し、１０００時間経過後の状況を調べることにより行った。   Table 1 shows the results of durability when a protective layer is applied to a polyethylene resin main pipe having a nominal diameter of 100. The accelerated weather resistance test was performed according to JISK7350-4, and the situation after 1000 hours was examined.

Figure 2006327154
Figure 2006327154

表１から明らかなように、この発明の実施例１、２、３は、何れも、内部のポリエチレン樹脂本管に異常は見られず、ポリエチレン樹脂本管に保護層を施工することにより、屋外露出環境でも耐久性を有していることが分かった。これに対して、保護層および光遮断層がない比較例は、表面変色が見られた。   As is clear from Table 1, in Examples 1, 2, and 3 of the present invention, no abnormality was found in the inner polyethylene resin main tube, and by installing a protective layer on the polyethylene resin main tube, It was found to be durable even in an exposed environment. On the other hand, surface discoloration was seen in the comparative example without the protective layer and the light blocking layer.

この発明のポリオレフィン樹脂管を示す断面図である。It is sectional drawing which shows the polyolefin resin pipe | tube of this invention. 直管部にテープ状保護層を巻き付ける方法を示す図であり、（ａ）は、施工前を示す図、（ｂ）は、施工後を示す図である。It is a figure which shows the method of winding a tape-shaped protective layer around a straight pipe part, (a) is a figure which shows before construction, (b) is a figure which shows after construction. 電気融着継手部にテープ状保護層を巻き付ける方法を示す図であり、（ａ）は、施工前、（ｂ）は、施工準備を示す図、（ｃ）は、施工後を示す図である。It is a figure which shows the method of winding a tape-shaped protective layer around an electric fusion joint part, (a) is a figure before construction, (b) is a figure which shows construction preparation, (c) is a figure which shows after construction. . この発明の他のポリオレフィン樹脂管を示す断面図である。It is sectional drawing which shows the other polyolefin resin pipe | tube of this invention.

符号の説明Explanation of symbols

１：ポリオレフィン樹脂本管
２：保護層
３：電気融着継手
４：マスチック
５：ターミナル
６：光遮断層 1: Polyolefin resin main pipe 2: Protective layer 3: Electrical fusion joint 4: Mastic 5: Terminal 6: Light blocking layer

Claims (3)

ポリオレフィン樹脂本管の外面に、耐候性を有する保護層が設けられていることを特徴とするポリオレフィン樹脂管。   A polyolefin resin pipe characterized in that a protective layer having weather resistance is provided on the outer surface of the polyolefin resin main pipe. 前記保護層は、多孔質基材に、ペトロラタムを主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、酸化重合型乾性油を主成分としたコンパウンドを含浸させた材料、または、多孔質基材に、ポリマー水分散液を含浸させた材料であることを特徴とする、請求項１記載のポリオレフィン樹脂管。   The protective layer is a material in which a porous substrate is impregnated with a compound mainly composed of petrolatum, or a material in which a porous substrate is impregnated with a compound mainly composed of oxidation polymerization type dry oil, or 2. The polyolefin resin pipe according to claim 1, wherein the porous base material is a material in which a polymer aqueous dispersion is impregnated. 前記保護層の外面に光遮断のための光遮断層が設けられていることを特徴とする、請求項１または２記載のポリオレフィン樹脂管。   The polyolefin resin pipe according to claim 1, wherein a light blocking layer for blocking light is provided on an outer surface of the protective layer.
JP2005157579A 2005-05-30 2005-05-30 Polyolefin resin pipe Pending JP2006327154A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012112441A (en) * 2010-11-24 2012-06-14 Mitsui Kagaku Sanshi Kk Piping material
JP2012189118A (en) * 2011-03-09 2012-10-04 Kubota-Ci Co Resin pipe with joint for temporary piping, connection structure for resin pipe with joint for temporary piping, temporary piping conduit, and metallic joint
JP2016006352A (en) * 2015-07-30 2016-01-14 三井化学産資株式会社 Existing pipeline replacement method
KR20170105579A (en) 2015-02-20 2017-09-19 세키스이가가쿠 고교가부시키가이샤 Fiber reinforced composite pipe and hot / cold water piping system
JP2021173306A (en) * 2020-04-22 2021-11-01 積水化学工業株式会社 Multilayer pipe
JP2021173305A (en) * 2020-04-22 2021-11-01 積水化学工業株式会社 Multilayer pipe

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012112441A (en) * 2010-11-24 2012-06-14 Mitsui Kagaku Sanshi Kk Piping material
JP2012189118A (en) * 2011-03-09 2012-10-04 Kubota-Ci Co Resin pipe with joint for temporary piping, connection structure for resin pipe with joint for temporary piping, temporary piping conduit, and metallic joint
KR20170105579A (en) 2015-02-20 2017-09-19 세키스이가가쿠 고교가부시키가이샤 Fiber reinforced composite pipe and hot / cold water piping system
US10544886B2 (en) 2015-02-20 2020-01-28 Sekisui Chemical Co., Ltd. Fiber-reinforced composite pipe and cold/warm water piping system
JP2016006352A (en) * 2015-07-30 2016-01-14 三井化学産資株式会社 Existing pipeline replacement method
JP2021173306A (en) * 2020-04-22 2021-11-01 積水化学工業株式会社 Multilayer pipe
JP2021173305A (en) * 2020-04-22 2021-11-01 積水化学工業株式会社 Multilayer pipe
JP7453841B2 (en) 2020-04-22 2024-03-21 積水化学工業株式会社 multilayer pipe
JP7453840B2 (en) 2020-04-22 2024-03-21 積水化学工業株式会社 multilayer pipe

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