JP2000352483A - Heat resistant vinyl chloride base resin pipe - Google Patents
Heat resistant vinyl chloride base resin pipeInfo
- Publication number
- JP2000352483A JP2000352483A JP21112099A JP21112099A JP2000352483A JP 2000352483 A JP2000352483 A JP 2000352483A JP 21112099 A JP21112099 A JP 21112099A JP 21112099 A JP21112099 A JP 21112099A JP 2000352483 A JP2000352483 A JP 2000352483A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- heat
- resistant vinyl
- less
- hours
- 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.)
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Links
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- Rigid Pipes And Flexible Pipes (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耐熱塩化ビニル系
樹脂管に関する。The present invention relates to a heat-resistant vinyl chloride resin tube.
【０００２】[0002]
【従来の技術】塩化ビニル系樹脂（以下、ＰＶＣともい
う）は、通常、水懸濁重合で製造されるため細孔を有す
る粒子（グレイン粒子）であり、その成形品は機械的強
度、耐候性、耐薬品性に優れており、しかも、他のプラ
スチック材料と比較しても安価なため、給水配管等の多
くの用途に使用されている。しかしながら、ＰＶＣは熱
変形温度が低く、使用可能な上限温度が６０〜７０℃付
近であるため、熱水を流す給湯管等には使用が困難であ
った。2. Description of the Related Art Vinyl chloride resins (hereinafter, also referred to as PVC) are particles having fine pores (grain particles) because they are usually produced by water suspension polymerization, and the molded product has mechanical strength and weather resistance. It is used in many applications such as water supply pipes because it has excellent properties and chemical resistance and is inexpensive compared to other plastic materials. However, PVC has a low heat distortion temperature and its usable upper limit temperature is around 60 to 70 ° C., so that it has been difficult to use PVC for hot water supply pipes through which hot water flows.
【０００３】そこで、ＰＶＣの高温下での耐久性能を向
上させるため、ＰＶＣを塩素化して耐熱性を向上させた
塩素化塩化ビニル樹脂（以下、ＣＰＶＣともいう）が開
発された。これにより、ＰＶＣ元来の特性である易施工
性及び易接着性を有するとともに耐熱性をも有する塩化
ビニル系樹脂成形品が製造されるようになった。Therefore, in order to improve the durability of PVC at high temperatures, a chlorinated vinyl chloride resin (hereinafter also referred to as CPVC) has been developed in which PVC is chlorinated to improve heat resistance. As a result, a PVC-based resin molded article having easy workability and easy adhesion, which are inherent properties of PVC, and also having heat resistance has been produced.
【０００４】このような耐熱塩化ビニル系樹脂成形品と
して、例えば、特開平４−３５９９２８号公報には、塩
化ビニル系樹脂を塩素化することにより塩素含有量を６
７．５重量％以上とした塩素化塩化ビニル系樹脂と特定
の配合剤を用い、易施工性及び易接着性を備え、さらに
耐熱性及び衛生性を備えた耐熱塩化ビニル系樹脂管が提
案されている。[0004] As such a heat-resistant vinyl chloride resin molded article, for example, Japanese Patent Application Laid-Open No. 4-35928 discloses a vinyl chloride resin having a chlorine content of 6 by chlorination.
A heat-resistant vinyl chloride-based resin tube is proposed that uses a chlorinated vinyl chloride-based resin of 7.5% by weight or more and a specific compounding agent, has easy workability and easy adhesion, and has heat resistance and sanitation. ing.
【０００５】しかしながら、ＣＰＶＣの成形品は塩素化
度が高くなるに従って耐熱性能が向上するものの、一般
のＰＶＣと比較して粘度が高くなり、応力緩和時間が長
いため成形品の平滑性に劣るようになり、内面のムラが
大きくなるという問題点があった。このような問題点
は、見た目に悪いだけでなく、表面の凹凸の影響により
水等の滞留が発生し易く、細菌の繁殖等に繋がるため、
ＣＰＶＣの成形品を給湯用配管やプラント用の超純水用
配管として使用することは難しかった。[0005] However, although the heat resistance of a molded article of CPVC is improved as the degree of chlorination is increased, the viscosity is higher than that of ordinary PVC, and the smoothness of the molded article is inferior due to a longer stress relaxation time. And the unevenness of the inner surface becomes large. Such a problem is not only bad in appearance, but also stagnation of water or the like easily occurs due to the influence of surface irregularities, leading to the propagation of bacteria, etc.
It was difficult to use CPVC molded products as hot water supply piping or ultrapure water piping for plants.
【０００６】このような成形品の平滑性や内面ムラの問
題を解決するためには、一般に、成形樹脂温度や金型温
度を上昇させたり、金型内での滞留時間を長くしたりす
る方法がとられるが、耐熱塩化ビニル系樹脂成形品に十
分な平滑性を付与するためには、成形温度をかなり上昇
させたり、金型内滞留時間をかなり長くする必要があ
り、樹脂が熱履歴を受け分解しやすく、ロングラン性
（連続製造性）に問題を生じる場合があった。[0006] In order to solve such problems of the smoothness and inner surface unevenness of a molded product, generally, a method of increasing a molding resin temperature or a mold temperature or increasing a residence time in the mold is used. However, in order to impart sufficient smoothness to the heat-resistant vinyl chloride resin molded product, it is necessary to considerably increase the molding temperature or to lengthen the residence time in the mold. In some cases, it was easily decomposed and decomposed, causing a problem in long-run performance (continuous production).
【０００７】また、ＣＰＶＣの塩素化前のＰＶＣの重合
度を低くすることによっても、成形品の平滑性や内面ム
ラの問題を解決することは可能であるが、この場合、高
温状態で使用した際の長期クリープ性能が低下してしま
うという問題点があった。更に、耐熱塩化ビニル系樹脂
管を接着剤で接合する場合、使用する接着剤中の溶剤
（テトラヒドロフラン、メチルエチルケトン、シクロヘ
キサノン等）により，接合後に管内面に、いわゆるソル
ベントクラック（以下、ＳＣという）が発生し，亀裂破
壊の原因となることがあり、このＳＣの発生も重合度が
低いＰＶＣを用いた場合に多くみられた。[0007] It is also possible to solve the problems of smoothness and uneven inner surface of a molded article by lowering the degree of polymerization of PVC before chlorination of CPVC. In such a case, there is a problem that the long-term creep performance is reduced. Further, when joining a heat-resistant vinyl chloride resin tube with an adhesive, a so-called solvent crack (hereinafter, referred to as SC) is generated on the inner surface of the tube after joining due to a solvent (tetrahydrofuran, methyl ethyl ketone, cyclohexanone, etc.) in the adhesive used. However, this may cause crack destruction, and the generation of this SC was often observed when PVC having a low degree of polymerization was used.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、上記問題点
を解決するために、内外面の平滑性に優れ，高い長期ク
リープ性と優れた耐ＳＣ性とを有する耐熱塩化ビニル系
樹脂管を提供することを課題とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a heat-resistant vinyl chloride resin tube having excellent smoothness on the inner and outer surfaces, high long-term creep property and excellent SC resistance. The task is to provide.
【０００９】[0009]
【課題を解決するための手段】請求項１に記載の発明
（以下、発明１という）による耐熱塩化ビニル系樹脂管
は、ＡＳＴＭ Ｄ ２８３７に準拠した９０℃での長期
内圧クリープ試験において、破壊時間１０００時間にお
ける破壊応力が４．０ＭＰａ以上であり、管内面のうね
りムラＷｃｔが３０μm 以下であり、かつ、管内面の表
面粗さＲｍａｘが３μｍ以下であることを特徴とする。The heat-resistant vinyl chloride resin tube according to the invention described in claim 1 (hereinafter referred to as invention 1) has a failure time in a long-term internal pressure creep test at 90 ° C. in accordance with ASTM D2837. It is characterized in that the breaking stress at 1000 hours is 4.0 MPa or more, the waviness unevenness Wct of the inner surface of the tube is 30 μm or less, and the surface roughness Rmax of the inner surface of the tube is 3 μm or less.
【００１０】請求項２に記載の発明（以下、発明２とい
う）による耐熱塩化ビニル系樹脂管は、管内面のうねり
ムラＷｃｔが３０μm 以下であり、管内面の表面粗さＲ
ｍａｘが３μｍ以下であり、かつ、５％偏平状態で接着
剤雰囲気下に−５℃で、１７時間放置した後の破壊偏平
率が１０％以上であることを特徴とする。The heat-resistant vinyl chloride resin pipe according to the invention described in claim 2 (hereinafter referred to as invention 2) has a waviness unevenness Wct of 30 μm or less on the inner surface of the tube and a surface roughness R of the inner surface of the tube.
It is characterized in that the max is 3 μm or less, and the flattening rate of destruction after standing for 17 hours at −5 ° C. in an adhesive atmosphere in a 5% flat state is 10% or more.
【００１１】請求項３に記載の発明（以下、発明３とい
う）による耐熱塩化ビニル系樹脂管は、ＡＳＴＭ Ｄ
２８３７に準拠した９０℃での長期内圧クリープ試験に
おいて、破壊時間１０００時間における破壊応力が４．
０ＭＰａ以上であり、管内面のうねりムラＷｃｔが３０
μm 以下であり、かつ、５％偏平状態で接着剤雰囲気下
に−５℃で、１７時間放置した後の破壊偏平率が１０％
以上であることを特徴とする。The heat-resistant vinyl chloride resin tube according to the invention described in claim 3 (hereinafter referred to as invention 3) is made of ASTM D
In a long-term internal pressure creep test at 90 ° C. according to 2837, the breaking stress at a breaking time of 1000 hours was 4.
0 MPa or more, and undulation Wct on the inner surface of the pipe is 30
μm or less, and the flattening rate of fracture after standing for 17 hours at -5 ° C. in an adhesive atmosphere in a 5% flat state is 10%.
It is characterized by the above.
【００１２】請求項４に記載の発明（以下、発明４とい
う）による耐熱塩化ビニル系樹脂管は、ＡＳＴＭ Ｄ
２８３７に準拠した９０℃での長期内圧クリープ試験に
おいて、破壊時間１０００時間における破壊応力が４．
０ＭＰａ以上であり、管内面の表面粗さＲｍａｘが３μ
ｍ以下であり、かつ、５％偏平状態で接着剤雰囲気下に
−５℃で、１７時間放置した後の破壊偏平率が１０％以
上であることを特徴とする。The heat-resistant vinyl chloride resin tube according to the invention described in claim 4 (hereinafter referred to as invention 4) is an ASTM D
In a long-term internal pressure creep test at 90 ° C. according to 2837, the breaking stress at a breaking time of 1000 hours was 4.
0 MPa or more, and the surface roughness Rmax of the inner surface of the tube is 3 μm.
m, and the flattening rate of fracture after standing at -5 ° C for 17 hours in an adhesive atmosphere in a 5% flat state is 10% or more.
【００１３】請求項５に記載の発明（以下、発明５とい
う）による耐熱塩化ビニル系樹脂管は、ＡＳＴＭ Ｄ
２８３７に準拠した９０℃での長期内圧クリープ試験に
おいて、破壊時間１０００時間における破壊応力が４．
０ＭＰａ以上であり、管内面のうねりムラＷｃｔが３０
μm 以下であり、管内面の表面粗さＲｍａｘが３μｍ以
下であり、かつ、５％偏平状態で接着剤雰囲気下に−５
℃で、１７時間放置した後の破壊偏平率が１０％以上で
あることを特徴とする。以下、本発明について詳述するThe heat-resistant vinyl chloride resin tube according to the invention described in claim 5 (hereinafter referred to as invention 5) is an ASTM D
In a long-term internal pressure creep test at 90 ° C. according to 2837, the breaking stress at a breaking time of 1000 hours was 4.
0 MPa or more, and undulation Wct on the inner surface of the pipe is 30
μm or less, the surface roughness Rmax of the inner surface of the tube is 3 μm or less, and -5% in a flat state of 5% in an adhesive atmosphere.
It is characterized in that the flattened fracture after standing at 17 ° C. for 17 hours is 10% or more. Hereinafter, the present invention will be described in detail.
【００１４】発明１，３，４及び５の耐熱塩化ビニル系
樹脂管は、ＡＳＴＭ Ｄ ２８３７に準拠した９０℃で
の長期内圧クリープ試験において、破壊時間１０００時
間における破壊応力が４．０ＭＰａ以上であることが必
要である。上記ＡＳＴＭ Ｄ２８３７に準拠した９０℃
での長期内圧クリープ試験では、高温下で使用した際の
長期性能（破壊せずに使用できる年数）、即ち、耐久性
を判断することができる。上記破壊応力が４．０ＭＰａ
未満では、耐熱塩化ビニル系樹脂管を熱水を流す用途で
使用することが困難であったり、高温雰囲気下や高温流
体を流す用途で長時間使用する際の信頼性が劣る。ま
た、給湯管等のライフライン等の、破壊により大きな災
害や、損失を被る可能性が高いところで使用する場合に
は、さらに充分な信頼性を確保するため、上記破壊応力
が５．０ＭＰａ以上であることが好ましい。The heat resistant vinyl chloride resin tubes of Inventions 1, 3, 4 and 5 have a breaking stress of 4.0 MPa or more at a breaking time of 1000 hours in a long-term internal pressure creep test at 90 ° C. in accordance with ASTM D2837. It is necessary. 90 ° C. according to ASTM D2837
In the long-term internal pressure creep test, the long-term performance (the number of years that can be used without breaking) when used at high temperature, that is, the durability can be determined. The breaking stress is 4.0 MPa
If it is less than 10, it is difficult to use the heat-resistant vinyl chloride-based resin pipe in a flow of hot water, or the reliability of the pipe for a long time in a high-temperature atmosphere or a flow of a high-temperature fluid is poor. In addition, when used in a place where there is a high possibility of suffering a large disaster or loss due to destruction, such as a lifeline such as a hot water supply pipe, in order to further secure sufficient reliability, the above-mentioned fracture stress is 5.0 MPa or more. Preferably, there is.
【００１５】発明１、２，３及び５の耐熱塩化ビニル系
樹脂管は、管内面のうねりムラＷｃｔが３０μm 以下で
あることが必要である。上記管内面のうねりムラＷｃｔ
が３０μm を超えると、外観が悪いため耐熱塩化ビニル
系樹脂製品としての価値が損なわれ、製品として満足で
きるものでなくなる。なお、うねりムラＷｃｔは、ＪＩ
Ｓ Ｂ ０６０１（１９９４）に準拠して、上記耐熱塩
化ビニル系樹脂管の内面の凸凹を長手方向に測定した際
の、最大値と最小値の差のことである。従って、上記う
ねりムラＷｃｔが大きいということは、耐熱塩化ビニル
系樹脂管の外観が悪いことを意味する。また、給湯管や
超純水用配管等で使用する場合、管内面の表面が荒れて
いると水が滞留し、細菌等の繁殖の恐れがあるため、管
内面のうねりムラＷｃｔは１０μｍ以下であることが好
ましい。In the heat-resistant vinyl chloride resin pipes of Inventions 1, 2, 3 and 5, it is necessary that the waviness unevenness Wct on the inner surface of the pipe is 30 μm or less. Undulation unevenness Wct on the inner surface of the pipe
If it exceeds 30 μm, its value as a heat-resistant vinyl chloride resin product will be impaired due to poor appearance, and the product will not be satisfactory. The undulation unevenness Wct is determined by JI
This is the difference between the maximum value and the minimum value when the unevenness of the inner surface of the heat resistant vinyl chloride resin tube is measured in the longitudinal direction according to SB0601 (1994). Therefore, a large undulation unevenness Wct means that the appearance of the heat-resistant vinyl chloride resin tube is poor. In addition, when used in a hot water supply pipe or a pipe for ultrapure water, if the surface of the pipe inner surface is rough, water will stagnate, and bacteria and the like may propagate. Therefore, the undulation unevenness Wct of the pipe inner surface is 10 μm or less. Preferably, there is.
【００１６】発明１、２，４及び５の耐熱塩化ビニル系
樹脂管は、管内面の表面粗さＲｍａｘが３μｍ以下であ
ることが必要である。上記表面粗さＲｍａｘが３μｍを
超えると、耐熱塩化ビニル系樹脂管の平滑性が劣るた
め、管の表面に光沢がなくなり、製品としての価値に劣
る。なお、表面粗さＲｍａｘは、ＪＩＳ Ｂ ０６０１
（１９９４）に準拠して測定した。また、給湯管や超純
水用配管等で使用する場合には、表面が荒れていると水
が滞留し、細菌等の繁殖の恐れがあるため、表面粗さＲ
ｍａｘは給湯管においては２μｍ以下が好ましく、超純
水用配管においては０．５μｍ以下が好ましい。The heat-resistant vinyl chloride resin pipes of Inventions 1, 2, 4 and 5 require that the inner surface of the pipe have a surface roughness Rmax of 3 μm or less. If the surface roughness Rmax exceeds 3 μm, the smoothness of the heat-resistant vinyl chloride resin tube is poor, so that the surface of the tube loses luster and is inferior in value as a product. The surface roughness Rmax is in accordance with JIS B 0601.
(1994). In addition, when used in a hot water supply pipe or a pipe for ultrapure water, if the surface is rough, water may stagnate, and bacteria and the like may be propagated.
max is preferably 2 μm or less in the hot water supply pipe, and 0.5 μm or less in the ultrapure water piping.
【００１７】発明２，３，４及び５の耐熱塩化ビニル系
樹脂管は、５％偏平状態で接着剤雰囲気下に−５℃で、
１７時間放置した後の破壊偏平率が１０％以上であるこ
とが必要である。上記破壊偏平率が１０％未満では、管
施工時に用いる接着剤と、成形、冷却時の残留応力、管
留め具締め付けによる応力、継手部に押し込んだ時に管
に発生する応力等とにより、耐熱塩化ビニル系樹脂管に
ＳＣが発生し、使用時の圧力、脈動等による繰り返し疲
労応力、衝撃等の外力により破壊する場合がある。ま
た、給湯管等のライフライン等や破壊により大きな災害
や損失を被る可能性が高いプラント等で使用する場合、
さらに厳しい条件においても高い耐ＳＣ性を保つために
は、破壊偏平率が５０％以上であることが好ましい。The heat-resistant vinyl chloride resin tubes of Inventions 2, 3, 4 and 5 are flat at 5% in an adhesive atmosphere at -5 ° C.
It is necessary that the fracture flattening rate after standing for 17 hours is 10% or more. If the fracture flattening rate is less than 10%, the adhesive used at the time of pipe construction, the residual stress at the time of molding and cooling, the stress caused by fastening the pipe fastener, the stress generated in the pipe when pushed into the joint, etc. SC may be generated in the vinyl-based resin pipe, and the pipe may be broken due to repeated fatigue stress due to pressure, pulsation or the like during use, or external force such as impact. In addition, when used in lifelines such as hot water supply pipes or plants that are likely to suffer large disasters or losses due to destruction,
In order to maintain high SC resistance even under more severe conditions, the flattening rate of fracture is preferably 50% or more.
【００１８】上記ＳＣは目視により観察することが可能
であるが、その明確な定量方法は確立されていない。ま
た、クラックが多かったり、深かったりする場合であっ
ても、使用時の偏平、圧力、疲労応力等に対する耐性に
優れる場合には、耐ＳＣ性に優れるということができ
る。そこで、本明細書においては、耐ＳＣ性についてＳ
Ｃ発生後の偏平に対する強度、即ち、上記破壊偏平率を
指標として評価している。なお、この偏平率は、１００
×（管の外直径−クラック発生時の平行平板距離）／
（管の外直径）により計算される。その評価方法につい
ては実施例で詳しく述べる。また、上記接着剤として
は、テトラヒドロフラン：メチルエチルケトン：シクロ
ヘキサノン＝４０：１０：５０の組成比を有する混合溶
剤が用いられる。Although the above SC can be observed visually, a clear quantitative method has not been established. In addition, even when there are many cracks or deep cracks, it can be said that SC resistance is excellent when the resistance to flatness, pressure, fatigue stress and the like during use is excellent. Therefore, in this specification, the SC resistance is S
The strength against flatness after the occurrence of C, that is, the fracture flattening rate is evaluated as an index. The flattening rate is 100
× (outer diameter of tube-distance of parallel flat plate when cracks occur) /
(Outer diameter of the tube). The evaluation method will be described in detail in Examples. In addition, a mixed solvent having a composition ratio of tetrahydrofuran: methyl ethyl ketone: cyclohexanone = 40: 10: 50 is used as the adhesive.
【００１９】このような特性を有する本発明の耐熱塩化
ビニル系樹脂管は、塩素化塩化ビニル樹脂（ＣＰＶＣ）
を成形することにより作製したものである。上記ＣＰＶ
Ｃは、塩化ビニル系樹脂（ＰＶＣ）を塩素化することに
より得ることができる。The heat-resistant vinyl chloride resin tube of the present invention having such characteristics is made of chlorinated vinyl chloride resin (CPVC).
Is produced by molding the same. The above CPV
C can be obtained by chlorinating a vinyl chloride resin (PVC).
【００２０】上記ＣＰＶＣの塩素化前のＰＶＣの表面状
態や粒子構造に関し、上記した特性を有する耐熱塩化ビ
ニル系樹脂管を得るには、例えば、ＢＥＴ比表面積値が
１．３〜８．０ｍ2 ／ｇで、電子分光化学（ＥＳＣＡ）
分析による粒子表面分析において、炭素原子と塩素原子
の１ｓ結合エネルギー値（ｅＶ）におけるピーク比が
０．６を超えるものが好ましい。In order to obtain a heat-resistant vinyl chloride resin tube having the above-mentioned properties with respect to the surface condition and the particle structure of the PVC before chlorination of the CPVC, for example, a BET specific surface area value of 1.3 to 8.0 m 2. / G, Electron Spectroscopy (ESCA)
In the particle surface analysis by the analysis, it is preferable that the peak ratio of the carbon atom and the chlorine atom in the 1s bond energy value (eV) exceeds 0.6.
【００２１】上記ＰＶＣのＢＥＴ比表面積値が１．３ｍ
2 ／ｇ未満では、ＰＶＣ粒子内部に０．１μｍ以下の微
細孔が少なくなるため、塩素化が均一になされなくな
り、熱安定性が向上しなくなる場合がある。また、ゲル
化が遅く、成形加工上好ましくなくなる。一方、ＢＥＴ
比表面積値が８．０ｍ2 ／ｇを超えると、塩素化前のＰ
ＶＣ粒子自体の熱安定性が低下するため、得られるＣＰ
ＶＣの加工性が悪くなる場合がある。The PVC has a BET specific surface area of 1.3 m.
If it is less than 2 / g, fine pores of 0.1 μm or less are reduced inside the PVC particles, so that chlorination may not be uniform and thermal stability may not be improved. Further, the gelation is slow, which is not preferable in the molding process. Meanwhile, BET
If the specific surface area exceeds 8.0 m 2 / g, the P
Since the thermal stability of the VC particles themselves decreases, the resulting CP
The workability of VC may be deteriorated.
【００２２】上記ＰＶＣの炭素原子と塩素原子の１ｓ結
合エネルギー値（ｅＶ）におけるピーク比が０．６以下
では、ＰＶＣ粒子表面に分散剤等の添加剤が吸着してい
ると考えられるため、後工程での塩素化速度が遅くなる
だけではなく、得られるＣＰＶＣの成形加工性に問題が
生じ、また、熱安定性が劣るようになる。より好ましく
は、上記ピーク比が０．７を超えるものである。If the peak ratio of the carbon atoms and chlorine atoms of the PVC in the 1s bond energy value (eV) is 0.6 or less, it is considered that an additive such as a dispersant is adsorbed on the surface of the PVC particles. Not only does the chlorination rate in the process become slow, but also a problem arises in the formability of the resulting CPVC, and the thermal stability becomes poor. More preferably, the peak ratio exceeds 0.7.
【００２３】なお、上記ＰＶＣ中の塩素原子と炭素原子
のとの存在比は、塩素原子：炭素原子＝１：２であり
（末端構造、分岐を考慮しないとき）、上記１ｓ結合エ
ネルギー値（ｅＶ）におけるピーク比（塩素原子ピーク
×２／炭素原子ピーク）は０〜１の値となる。ピーク比
が０の場合は、ＰＶＣ粒子表面がＰＶＣ以外で、かつ、
塩素を含まない他の物質により覆われていることを意味
し、ピーク比が１の場合は、ＰＶＣ粒子表面が、完全に
塩化ビニル成分のみで覆われていることを意味する。The abundance ratio between chlorine atoms and carbon atoms in the PVC is chlorine: carbon atoms = 1: 2 (when the terminal structure and branching are not taken into account), and the 1s bond energy value (eV ) Has a value of 0 to 1 (chlorine atom peak × 2 / carbon atom peak). When the peak ratio is 0, the surface of the PVC particles is other than PVC, and
When the peak ratio is 1, it means that the surface of the PVC particles is completely covered with only the vinyl chloride component.
【００２４】上記ＰＶＣは，塩化ビニル単量体（以下、
ＶＣＭという）単独，又は，ＶＣＭ及びＶＣＭと共重合
可能な他の単量体の混合物を公知の方法（例えば、懸濁
重合、塊状重合等）で重合してなる樹脂である。上記Ｖ
ＣＭと共重合可能な他の単量体としては特に限定され
ず、例えば、酢酸ビニル等のアルキルビニルエステル
類、エチレン、プロピレン等のα−モノオレフィン類、
塩化ビニリデン、スチレン等が挙げられる。これらは単
独で用いてもよく、2 種以上を併用してもよい。The above-mentioned PVC is a vinyl chloride monomer (hereinafter referred to as “vinyl chloride monomer”).
It is a resin obtained by polymerizing VCM alone or a mixture of VCM and another monomer copolymerizable with VCM by a known method (for example, suspension polymerization, bulk polymerization and the like). V above
Other monomers copolymerizable with CM are not particularly limited, for example, alkyl vinyl esters such as vinyl acetate, ethylene, α-monoolefins such as propylene,
Examples include vinylidene chloride and styrene. These may be used alone or in combination of two or more.
【００２５】上記ＰＶＣの平均重合度は特に限定されな
いが、高すぎると耐熱塩化ビニル系樹脂管の平滑性が損
なわれることがあり、低すぎると耐ＳＣ性や長期クリー
プ性に劣ることがあるため７００〜１３００が好まし
い。より好ましくは９００〜１１００である。上記平均
重合度は、ＪＩＳ Ｋ ６７２１に準拠した方法により
測定することができる。The average polymerization degree of the PVC is not particularly limited, but if it is too high, the smoothness of the heat-resistant vinyl chloride resin tube may be impaired, and if it is too low, SC resistance and long-term creep properties may be poor. 700 to 1300 is preferred. More preferably, it is 900 to 1100. The average degree of polymerization can be measured by a method according to JIS K6721.
【００２６】上記ＰＶＣを塩素化する方法としては特に
限定されず、従来公知の各種方法で行うことができる。
例えば、上記ＰＶＣを懸濁した状態、溶剤に溶解した状
態、又は固体状態とした後、塩素と接触させること等に
より行うことができる。The method for chlorinating the PVC is not particularly limited, and can be performed by various conventionally known methods.
For example, it can be carried out by bringing the above PVC into a suspended state, a state dissolved in a solvent, or a solid state, and then contacting it with chlorine.
【００２７】上記塩素化反応により得られるＣＰＶＣの
塩素化度は特に限定されるないが、高すぎると耐熱塩化
ビニル系樹脂管の平滑性や内面ムラの問題が発生し易
く、該耐熱塩化ビニル系樹脂管を成形する際の成形性に
劣ることがあり、低すぎると高温下での長期クリープ性
に劣ることがあるため６２．０〜６９．０重量％が好ま
しい。より好ましくは６６．０〜６７．５重量％であ
る。The chlorination degree of the CPVC obtained by the above chlorination reaction is not particularly limited, but if it is too high, problems such as smoothness and unevenness of the inner surface of the heat-resistant vinyl chloride resin tube are likely to occur. The moldability at the time of molding the resin pipe may be poor, and if it is too low, the long-term creep property at high temperature may be poor, so that 62.0 to 69.0% by weight is preferable. More preferably, it is 66.0 to 67.5% by weight.
【００２８】上記ＣＰＶＣの空隙率やＢＥＴ比表面積は
特に限定されないが、ＣＰＶＣに易ゲル化性を付与する
ことができる点から、空隙率は３０〜４０容量％が好ま
しく、ＢＥＴ比表面積は２〜１２ｍ2 ／ｇが好ましい。The porosity and the BET specific surface area of the above-mentioned CPVC are not particularly limited, but the porosity is preferably 30 to 40% by volume and the BET specific surface area is 2 to 2 from the viewpoint that the gelling property can be imparted to the CPVC. 12 m 2 / g is preferred.
【００２９】上記ＣＰＶＣを成形し、本発明の耐熱塩化
ビニル系樹脂管を製造する際には、安定剤、改質剤、加
工助剤、滑剤、酸化防止剤、光安定剤、紫外線吸収剤、
帯電防止剤、顔料、充填剤、可塑剤等の一般に塩化ビニ
ル系樹脂の成形時に用いられている配合剤を、本発明の
目的を損なわない範囲で必要に応じて配合してもよい。When the above-mentioned CPVC is molded to produce the heat resistant vinyl chloride resin tube of the present invention, a stabilizer, a modifier, a processing aid, a lubricant, an antioxidant, a light stabilizer, an ultraviolet absorber,
A compounding agent generally used in molding a vinyl chloride resin, such as an antistatic agent, a pigment, a filler, and a plasticizer, may be compounded as needed within a range not to impair the purpose of the present invention.
【００３０】上記安定剤としては特に限定されず、例え
ば、熱安定剤、熱安定化助剤等が挙げられる。上記熱安
定剤としては特に限定されず、例えば、ジメチル錫メル
カプト、ジブチル錫メルカプト、ジオクチル錫メルカプ
ト、ジブチル錫マレート、ジブチル錫マレートポリマ
ー、ジオクチル錫マレート、ジオクチル錫マレートポリ
マー、ジブチル錫ラウレート、ジブチル錫ラウレートポ
リマー等の有機錫系安定剤、ステアリン酸鉛、二塩基性
亜りん酸鉛、三塩基性硫酸鉛等の鉛系安定剤、カルシウ
ム−亜鉛系安定剤、バリウム−亜鉛系安定剤、バリウム
ーカドミウム系安定剤等が挙げられる。これらは単独で
用いてもよく、２種以上を併用してもよい。これらの熱
安定剤のなかでは、本発明の耐熱塩化ビニル系樹脂管を
給湯用管として用いる場合には、毒性の強い鉛系安定剤
やカドミウム系安定剤を用いることは好ましくなく錫系
安定剤を用いることが好ましい。The stabilizer is not particularly restricted but includes, for example, heat stabilizers and heat stabilizing auxiliaries. The heat stabilizer is not particularly limited, for example, dimethyltin mercapto, dibutyltin mercapto, dioctyltin mercapto, dibutyltin malate, dibutyltin maleate polymer, dioctyltin malate, dioctyltin maleate polymer, dibutyltin laurate, dibutyl Organotin stabilizers such as tin laurate polymers, lead stearate, dibasic lead phosphite, lead stabilizers such as tribasic lead sulfate, calcium-zinc stabilizer, barium-zinc stabilizer, And barium-cadmium stabilizers. These may be used alone or in combination of two or more. Among these heat stabilizers, when the heat-resistant vinyl chloride-based resin pipe of the present invention is used as a hot water supply pipe, it is not preferable to use a highly toxic lead-based stabilizer or cadmium-based stabilizer, and tin-based stabilizers are not preferred. It is preferable to use
【００３１】また、上記熱安定化助剤としては特に限定
されず、例えば、エポキシ化大豆油、りん酸エステル等
が挙げられる。これらは単独で用いてもよく、２種以上
を併用してもよい。The heat stabilizing aid is not particularly restricted but includes, for example, epoxidized soybean oil and phosphate esters. These may be used alone or in combination of two or more.
【００３２】上記安定剤及び安定化助剤の添加量は特に
限定されない。また、本発明の耐熱塩化ビニル系樹脂管
を超純水用管として用いる場合も、上記安定剤及び安定
化助剤の添加量は、金属溶出量や全有機炭素（ＴＯＣ）
の規制を満足する範囲内であれば特に限定されない。The amounts of the stabilizer and the stabilizing aid are not particularly limited. Also, when the heat-resistant vinyl chloride resin tube of the present invention is used as a tube for ultrapure water, the amount of the above-mentioned stabilizer and stabilizing aid added depends on the amount of metal elution and total organic carbon (TOC).
There is no particular limitation as long as it is within the range satisfying the above regulations.
【００３３】上記改質剤としては特に限定されず、例え
ば、シリコン系改質剤、マレイン酸／ブタジエン／スチ
レン共重合体（ＭＢＳ）系改質剤、塩素化ポリエチレン
（ＣＰＥ）系改質剤、アクリル系改質剤等が挙げられ
る。これらは単独で用いてもよく、２種以上を併用して
もよい。これらのなかでは、耐ＳＣ性を高めるために、
接着剤中の溶剤との相溶性の低い改質剤や、溶剤に対し
て化学変化、劣化を起こしにくい改質剤等を用いること
が好ましく、具体的には、シリコン系改質剤、フッ素系
改質剤を用いることが好ましい。上記改質剤の添加量
は、本発明の耐熱塩化ビニル系樹脂管の特性を損なわな
い範囲であれば特に限定されない。The modifier is not particularly restricted but includes, for example, a silicone modifier, a maleic acid / butadiene / styrene copolymer (MBS) modifier, a chlorinated polyethylene (CPE) modifier, Acrylic modifiers are exemplified. These may be used alone or in combination of two or more. Among these, in order to improve SC resistance,
It is preferable to use a modifier having low compatibility with the solvent in the adhesive or a modifier that is less likely to undergo chemical change and deterioration with respect to the solvent, specifically, a silicon-based modifier, a fluorine-based modifier, and the like. Preferably, a modifier is used. The amount of the modifier is not particularly limited as long as the properties of the heat-resistant vinyl chloride resin tube of the present invention are not impaired.
【００３４】上記加工助剤としては特に限定されず、例
えば、重量平均分子量１０万〜２００万のアルキルアク
リレート／アルキルメタクリレート共重合体等のアクリ
ル系加工助剤等が挙げられる。具体的には、ｎ−ブチル
アクリレート／メチルメタクリレート共重合体、２−エ
チルヘキシルアクリレート／メチルメタクリレート／ブ
チルメタクリレート共重合体等が挙げられる。これらは
単独で用いてもよく、２種以上を併用してもよい。上記
加工助剤の添加量は特に限定されないが、多すぎるとコ
ストアップにつながり、少なすぎると安定して耐熱塩化
ビニル系樹脂管の平滑性や内面ムラを良好に保ちにくい
ことから、ＣＰＶＣ１００重量部に対して０．１〜５．
０重量部が好ましく、０．３〜２．５重量部がより好ま
しい。The processing aid is not particularly restricted but includes, for example, acrylic processing aids such as alkyl acrylate / alkyl methacrylate copolymers having a weight average molecular weight of 100,000 to 2,000,000. Specifically, n-butyl acrylate / methyl methacrylate copolymer, 2-ethylhexyl acrylate / methyl methacrylate / butyl methacrylate copolymer, and the like can be given. These may be used alone or in combination of two or more. The amount of the processing aid is not particularly limited. However, if the amount is too large, the cost increases. If the amount is too small, it is difficult to stably maintain the smoothness and the inner surface unevenness of the heat-resistant vinyl chloride resin tube. 0.1-5.
0 parts by weight is preferable, and 0.3 to 2.5 parts by weight is more preferable.
【００３５】上記滑剤としては、内部滑剤、外部滑剤が
挙げられる。上記内部滑剤とは、成形加工時の溶融樹脂
の流動粘度を低下させ、摩擦発熱を防止する目的で使用
されるものであり、具体的には、例えば、ブチルステア
レート、ラウリルアルコール、ステアリルアルコール、
エポキシ大豆油、グリセリンモノステアレート、ステア
リン酸、ビスアミド等が挙げられる。これらは単独で用
いてもよく、２種以上を併用してもよい。Examples of the above lubricant include an internal lubricant and an external lubricant. The internal lubricant is used for the purpose of reducing the flow viscosity of the molten resin at the time of molding and preventing frictional heating, and specifically, for example, butyl stearate, lauryl alcohol, stearyl alcohol,
Epoxy soybean oil, glycerin monostearate, stearic acid, bisamide and the like can be mentioned. These may be used alone or in combination of two or more.
【００３６】上記外部滑剤とは、成形加工時の溶融樹脂
と金属面との滑り効果を上げる目的で使用されるもので
あり、具体的には、例えば、パラフィンワックス、ポリ
オレフィンワックス、エステルワックス、モンタン酸ワ
ックス等が挙げられる。これらは単独で用いてもよく、
２種以上を併用してもよい。The above-mentioned external lubricant is used for the purpose of enhancing the sliding effect between the molten resin and the metal surface at the time of molding, and specifically, for example, paraffin wax, polyolefin wax, ester wax, montan Acid wax and the like. These may be used alone,
Two or more kinds may be used in combination.
【００３７】上記酸化防止剤としては特に限定されず、
例えば、フェノール系抗酸化剤等が挙げられる。The antioxidant is not particularly limited.
For example, phenolic antioxidants and the like can be mentioned.
【００３８】上記光安定剤としては特に限定されず、例
えば、ヒンダードアミン系等が挙げられる。The light stabilizer is not particularly restricted but includes, for example, hindered amines.
【００３９】上記紫外線吸収剤としては特に限定され
ず、例えば、サリチル酸エステル系、ベンゾフェノン
系、ベンゾトリアゾール系、シアノアクリレート系等が
挙げられる。これらは単独で用いてもよく、２種以上を
併用してもよい。The ultraviolet absorber is not particularly restricted but includes, for example, salicylic acid esters, benzophenones, benzotriazoles and cyanoacrylates. These may be used alone or in combination of two or more.
【００４０】上記帯電防止剤としては特に限定されず、
例えば、カチオン系帯電防止剤、非イオン系帯電防止剤
等が挙げられる。The antistatic agent is not particularly limited.
For example, a cationic antistatic agent, a nonionic antistatic agent and the like can be mentioned.
【００４１】上記顔料としては特に限定されず、例え
ば、アゾ系、フタロシアニン系、スレン系、染料レーキ
系等の有機顔料、酸化物系、クロム酸モリブデン系、硫
化物・セレン化物系、フェロシアニン化物系等の無機顔
料等が挙げられる。これらは単独で用いてもよく、２種
以上を併用してもよい。The above-mentioned pigments are not particularly restricted but include, for example, organic pigments such as azo, phthalocyanine, sulene and dye lakes, oxides, molybdenum chromates, sulfides / selenides, ferrocyanides. And other inorganic pigments. These may be used alone or in combination of two or more.
【００４２】上記充填剤としては特に限定されず、例え
ば、炭酸カルシウム、タルク等が挙げられる。これらは
単独で用いてもよく、２種以上を併用してもよい。The filler is not particularly restricted but includes, for example, calcium carbonate and talc. These may be used alone or in combination of two or more.
【００４３】上記可塑剤としては特に限定されず、例え
ば、ジブチルフタレート、ジ−２―エチルヘキシルフタ
レート、ジ−２―エチルヘキシルアジペート等が挙げら
れる。これらは単独で用いてもよく、２種以上を併用し
てもよい。The plasticizer is not particularly restricted but includes, for example, dibutyl phthalate, di-2-ethylhexyl phthalate, di-2-ethylhexyl adipate and the like. These may be used alone or in combination of two or more.
【００４４】上記した酸化防止剤、光安定剤、紫外線吸
収剤、帯電防止剤、顔料、充填材、可塑剤の添加量は、
本発明の耐熱塩化ビニル系樹脂管の特性を損なわない範
囲内であれば特に限定されない。The amounts of the above-mentioned antioxidants, light stabilizers, ultraviolet absorbers, antistatic agents, pigments, fillers and plasticizers are as follows:
There is no particular limitation as long as the properties of the heat-resistant vinyl chloride resin tube of the present invention are not impaired.
【００４５】上記ＣＰＶＣを成形する際に用いる成形機
としては特に限定されず、例えば、単軸押出機、二軸異
方向パラレル押出機、二軸異方向コニカル押出機、二軸
同方向押出機等が挙げられる。The molding machine used for molding the above-mentioned CPVC is not particularly limited, and examples thereof include a single-screw extruder, a twin-screw different-direction parallel extruder, a twin-screw different-direction conical extruder, and a twin-screw same-direction extruder. Is mentioned.
【００４６】本発明の耐熱塩化ビニル系樹脂管は、上記
配合剤の配合されたＣＰＶＣを用いて製造することがで
きる。このとき、賦形する金型、樹脂温度、成形条件
は、特に限定されないが、安定して平滑性を有する成形
品を成形することができる点から、金型の表面粗さは、
Ｒｍａｘが5 μm 以下、Ｒａが０．２μm 以下であるこ
とが好ましく、そのためにクロムメッキ等の表面処理が
施されていてもよい。また、金型のリップ部Ｌ／Ｄ
（Ｌ：リップ長さ、Ｄ：出口厚み）は１５以上であるこ
とが好ましい。なお、上記Ｒａとは、表面の平均粗さの
ことである。The heat-resistant vinyl chloride resin tube of the present invention can be manufactured using CPVC mixed with the above-mentioned compounding agents. At this time, the mold to be shaped, the resin temperature and the molding conditions are not particularly limited, but from the viewpoint that a molded article having smoothness can be formed stably, the surface roughness of the mold is
It is preferable that Rmax is 5 μm or less, and Ra is 0.2 μm or less. For this purpose, surface treatment such as chrome plating may be performed. Also, the lip L / D of the mold
(L: lip length, D: outlet thickness) is preferably 15 or more. In addition, said Ra is average roughness of a surface.
【００４７】また、金型先端の温度も特に限定されない
が、熱安定性とロングラン性の点から、成形品の耐熱温
度をt ℃とすると、〔１９０＋（ｔ−１２０）／２〕℃
〜〔２２０＋（ｔ−１２０）〕℃が好ましい。Although the temperature at the tip of the mold is not particularly limited, assuming that the heat-resistant temperature of the molded product is t ° C. from the viewpoint of thermal stability and long run property, [190+ (t−120) / 2] ° C.
~ [220+ (t-120)] ° C.
【００４８】また、樹脂温度は分解、ロングラン性、物
性に問題のないレベルで高ければ高いほど、成形品の平
滑性が良好であるが、熱安定性とロングラン性の点か
ら、成形品の耐熱温度をt ℃とすると、〔１９５＋（ｔ
−１２０）／２〕℃〜〔２１０＋（ｔ−１２０）〕℃が
好ましい。The higher the resin temperature is at a level at which there is no problem in decomposition, long-run properties and physical properties, the better the smoothness of the molded article is. However, from the viewpoint of heat stability and long-run property, the heat resistance of the molded article is high. When the temperature is t ° C., [195+ (t
−120) / 2] ° C. to [210+ (t−120)] ° C.
【００４９】このような構成からなる本発明の耐熱塩化
ビニル系樹脂管は、給湯用配管やプラント用の超純水用
配管として好適に用いることができる。The heat-resistant vinyl chloride resin pipe of the present invention having such a configuration can be suitably used as a hot water supply pipe or a pipe for ultrapure water for a plant.
【００５０】[0050]
【発明の実施の形態】本発明をさらに詳しく説明するた
め以下に実施例を挙げるが、本発明はこれら実施例のみ
に限定されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【００５１】（実施例１） 〔ＰＶＣの調製〕内容積１００リットルの重合器（耐圧
オートクレーブ）に脱イオン水５０ｋｇを入れた後、塩
化ビニル単量体に対して、平均ケン化度８８モル％及び
重合度１０００の部分ケン化ポリ酢酸ビニル１２００ｐ
ｐｍとなる量を懸濁分散剤として投入し、更に、ｔ−ブ
チルパーオキシネオデカノエート５５０ｐｐｍとなる量
を投入した。次いで、重合器内を４５ｍｍＨｇまで脱気
した後、塩化ビニル単量体３３ｋｇを仕込み、撹拌を開
始した。重合器を５６℃に昇温して重合を開始し、重合
反応終了までこの温度を保った。重合転化率が５０％に
なった時点で反応を終了し、重合器内の未反応単量体を
回収した後、重合体をスラリー状で系外へ取り出し、脱
水乾燥してＰＶＣを得た。得られたＰＶＣの重合度は、
１０５０であった。(Example 1) [Preparation of PVC] After 50 kg of deionized water was charged into a polymerization vessel (pressure-resistant autoclave) having an internal volume of 100 liters, the average degree of saponification was 88 mol% based on the vinyl chloride monomer. And partially saponified polyvinyl acetate with a polymerization degree of 1000
pm was added as a suspending and dispersing agent, and further, 550 ppm of t-butyl peroxyneodecanoate was added. Next, after degassing the inside of the polymerization vessel to 45 mmHg, 33 kg of a vinyl chloride monomer was charged and stirring was started. The temperature of the polymerization vessel was raised to 56 ° C. to start polymerization, and this temperature was maintained until the polymerization reaction was completed. When the polymerization conversion reached 50%, the reaction was terminated, and the unreacted monomer in the polymerization vessel was recovered. Then, the polymer was taken out of the system in a slurry state, and dehydrated and dried to obtain PVC. The degree of polymerization of the obtained PVC is
It was 1050.
【００５２】〔ＣＰＶＣの調製〕内容積３００リットル
のグラスライニング製耐圧反応槽に、得られた含水ＰＶ
Ｃ２００ｋｇ（塩化ビニル系樹脂４０ｋｇと水性媒体１
６０ｋｇとからなる）を入れ、撹拌してＰＶＣを水中に
分散させた。その後、反応槽内を加温して槽内を１１０
℃に保った。次いで、反応槽内に窒素ガスを吹き込み、
槽内を窒素ガスで置換した後、反応槽内に塩素ガスを吹
き込みＰＶＣの塩素化を行った。反応槽内の塩酸濃度を
測定することにより塩素化反応の進行をモニターしなが
ら塩素化反応を続け、生成したＣＰＶＣの塩素含有率が
６６．４重量％に達した時点で塩素ガスの供給を停止
し、塩素化反応を終了した。更に、反応槽内に窒素ガス
を吹き込んで未反応塩素を除去し、得られた樹脂を水酸
化ナトリウムで中和した後、水で洗浄し脱水、乾燥して
粉末状のＣＰＶＣを得た。得られたＣＰＶＣの塩素含有
率は６６．４重量％であった。[Preparation of CPVC] The obtained hydrous PV was placed in a 300 liter glass-lined pressure-resistant reaction tank.
200 kg of C (40 kg of vinyl chloride resin and 1 aqueous medium)
60 kg) and stirred to disperse the PVC in the water. Thereafter, the inside of the reactor was heated to 110
C. Next, nitrogen gas is blown into the reaction tank,
After replacing the inside of the tank with nitrogen gas, chlorine gas was blown into the reaction tank to chlorinate PVC. The chlorination reaction is continued while monitoring the progress of the chlorination reaction by measuring the hydrochloric acid concentration in the reaction tank, and when the chlorine content of the generated CPVC reaches 66.4% by weight, the supply of the chlorine gas is stopped. Then, the chlorination reaction was completed. Furthermore, nitrogen gas was blown into the reaction tank to remove unreacted chlorine. The obtained resin was neutralized with sodium hydroxide, washed with water, dehydrated and dried to obtain a powdery CPVC. The chlorine content of the obtained CPVC was 66.4% by weight.
【００５３】〔配合〕上記ＣＰＶＣ１００重量部に対し
て、表１に示す各種配合剤を添加し、ヘンシェルミキサ
ーで室温から１３０℃まで昇温しながら混合した後、ク
ーリングミキサーで４５℃まで冷却した。[Blending] Various blending agents shown in Table 1 were added to 100 parts by weight of the above-mentioned CPVC, mixed while heating from room temperature to 130 ° C. with a Henschel mixer, and then cooled to 45 ° C. with a cooling mixer.
【００５４】〔成形〕上記配合粉を用い、以下の押出条
件で成形を行った。 押出機：長田製作所社製、ＳＬＭ５０（２軸異方向コニ
カル押出機） 金型：パイプ用金型、出口部外半径１１．６６ｍｍ、出
口部内半径９．４ｍｍ、Ｌ／Ｄ＝６０／２．３（ｍ
ｍ）、樹脂流動面クロムメッキ、Ｒｍａｘ＝5 μｍ、Ｒ
ａ＝０．１０μｍ（出口部周方向４箇所平均値）、３本
ブリッジ 押出量：２５ｋｇ／ｈ 樹脂温度：２００℃（金型入口部での温度） 回転数：２０〜２５ｒｐｍ 金型温度：Ｄ１ １９０℃、Ｄ２ ２０５℃、Ｄ３ ２
１０℃（先端平行部）[Molding] Using the above compounded powder, molding was performed under the following extrusion conditions. Extruder: SLM50 (biaxially different direction conical extruder) manufactured by Nagata Seisakusho Co., Ltd. Mold: Pipe mold, outlet outer radius 11.66 mm, outlet inner radius 9.4 mm, L / D = 60 / 2.3. (M
m), chromium plating on resin flow surface, Rmax = 5 μm, R
a = 0.10 μm (average value at four locations in the circumferential direction at the outlet) Three-bridge extrusion amount: 25 kg / h Resin temperature: 200 ° C. (temperature at the mold inlet) Rotation speed: 20 to 25 rpm Mold temperature: D1 190 ° C, D2 205 ° C, D32
10 ℃ (parallel tip)
【００５５】（実施例２） 〔ＰＶＣの調製〕重合温度を５９℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は９５０
であった。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．９重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Example 2) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was 59 ° C. The polymerization degree of the obtained PVC is 950.
Met. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The procedure was performed in the same manner as in Example 1 except that the content was 6.9% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００５６】（実施例３） 〔ＰＶＣの調製〕重合温度を５８℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は１００
０であった。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．７重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Example 3) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was 58 ° C. The degree of polymerization of the obtained PVC is 100
It was 0. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The same procedure was performed as in Example 1 except that the content was changed to 6.7% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００５７】（実施例４） 〔ＰＶＣの調製〕重合温度を５５℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は１１０
０であった。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．７重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Example 4) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was 55 ° C. The degree of polymerization of the obtained PVC is 110.
It was 0. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The same procedure was performed as in Example 1 except that the content was changed to 6.7% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００５８】（実施例５） 〔ＰＶＣの調製〕実施例１と同様に行った。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
７．２重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Example 5) [Preparation of PVC] The procedure of Example 1 was repeated. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The same operation as in Example 1 was performed except that the content was 7.2% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００５９】（比較例１） 〔ＰＶＣの調製〕重合温度を６１℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は９００
であった。 〔ＣＰＶＣの調製〕実施例３と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Comparative Example 1) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was 61 ° C. The degree of polymerization of the obtained PVC is 900
Met. [Preparation of CPVC] The procedure of Example 3 was repeated. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００６０】（比較例２） 〔ＰＶＣの調製〕実施例１と同様に行った。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．５重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Comparative Example 2) [Preparation of PVC] The same procedure as in Example 1 was carried out. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The same procedure as in Example 1 was carried out except that the content was changed to 6.5% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００６１】（比較例３） 〔ＰＶＣの調製〕重合温度を６２℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は８５０
であった。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．７重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Comparative Example 3) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was changed to 62 ° C. The degree of polymerization of the obtained PVC is 850.
Met. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The same procedure was performed as in Example 1 except that the content was changed to 6.7% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００６２】（比較例４） 〔ＰＶＣの調製〕重合温度を５４℃とした以外は、実施
例１と同様に行った。得られたＰＶＣの重合度は１２０
０であった。 〔ＣＰＶＣの調製〕得られたＣＰＶＣの塩素含有率を６
６．５重量％とする以外は、実施例１と同様に行った。 〔配合〕表１に示す各種配合剤を用いて、実施例１と同
様に行った。 〔成形〕実施例１と同じ押出機及び金型を用い、同じ押
出条件で成形を行った。(Comparative Example 4) [Preparation of PVC] The same procedure as in Example 1 was carried out except that the polymerization temperature was changed to 54 ° C. The degree of polymerization of the obtained PVC is 120.
It was 0. [Preparation of CPVC] The obtained CPVC had a chlorine content of 6%.
The procedure was performed in the same manner as in Example 1 except that the amount was changed to 6.5% by weight. [Blending] The same procedure as in Example 1 was carried out using the various blending agents shown in Table 1. [Molding] Using the same extruder and mold as in Example 1, molding was performed under the same extrusion conditions.
【００６３】〔耐熱塩化ビニル系樹脂管の評価方法〕上
記実施例１〜５及び比較例１〜４で得られた耐熱塩化ビ
ニル系樹脂管について、破壊時間１０００時間の破壊応
力、うねりムラＷｃｔ、表面粗さＲｍａｘ、破壊偏平率
を以下の評価方法で評価した。結果を表１に示した。[Evaluation Method of Heat-Resistant Vinyl Chloride-Based Resin Tube] The heat-resistant vinyl chloride-based resin tube obtained in each of Examples 1 to 5 and Comparative Examples 1 to 4 has a breaking stress of 1000 hours in breaking time, waviness unevenness Wct, The surface roughness Rmax and the fracture flatness were evaluated by the following evaluation methods. The results are shown in Table 1.
【００６４】（１）長期内圧クリープ試験 ＡＳＴＭ Ｄ ２８３７に準拠して、９０℃の熱水で測
定し、破壊時間１０００時間の破壊応力を評価した。(1) Long-term internal pressure creep test Measured with hot water at 90 ° C. in accordance with ASTM D 2837, and the breaking stress at breaking time of 1000 hours was evaluated.
【００６５】（２）内面うねりムラの測定 成形品の内面周方向１０箇所（３６°間隔）の各部で下
記の方法により内面うねりムラを測定し、その平均値を
計算しＷｃｔを求めた。 測定機器：東洋精密社製 ＳＵＲＦＣＯＭ １．６３ 測定条件 測定項目：ろ波中心うねり 測定速度：３ｍｍ／ｓ 評価長さ：１００ｍｍ カットオフ値：２．５〜２５．０ｍｍ 傾斜補正：Ｒ面 フィルタ種別：ガウシアン λs フィルタ：無し 予備駆動長さ：カットオフ比／３ 算出規格：ＪＩＳ Ｂ ０６０１（１９９４）(2) Measurement of Inner Surface Unevenness The inner surface undulation unevenness was measured by the following method at each of the 10 locations in the inner surface circumferential direction (36 ° interval) of the molded product, and the average value was calculated to obtain Wct. Measuring equipment: SURFCOM 1.63, manufactured by Toyo Seimitsu Co., Ltd. Measurement conditions Measurement item: Filter center waviness Measurement speed: 3 mm / s Evaluation length: 100 mm Cut-off value: 2.5 to 25.0 mm Tilt correction: R surface Filter type: Gaussian λs Filter: None Preliminary drive length: Cutoff ratio / 3 Calculation standard: JIS B 0601 (1994)
【００６６】（３）表面粗さの測定 成形品の内面周方向８箇所（４０°間隔）の各部で下記
の方法により表面粗さを測定し、その平均値を計算しＲ
ｍａｘを求めた。 測定機器：東洋精密社製 ＳＵＲＦＣＯＭ １．６３ 測定条件 測定項目：粗さ測定 測定速度：０．３ｍｍ／ｓ 評価長さ：０．２５ｍｍ カットオフ値：０．０８ｍｍ 傾斜補正：Ｒ面 フィルタ種別：ガウシアン λs フィルタ：無し 予備駆動長さ：カットオフ比／３ 算出規格：ＪＩＳ Ｂ ０６０１（１９９４）(3) Measurement of Surface Roughness The surface roughness was measured at each of eight locations (40 ° intervals) in the circumferential direction of the inner surface of the molded article by the following method, and the average value was calculated.
max was determined. Measuring device: SURFCOM 1.63 manufactured by Toyo Seimitsu Co., Ltd. Measurement conditions Measurement item: Roughness measurement Measurement speed: 0.3 mm / s Evaluation length: 0.25 mm Cut-off value: 0.08 mm Tilt correction: R surface Filter type: Gaussian λs filter: None Preliminary drive length: Cutoff ratio / 3 Calculation standard: JIS B 0601 (1994)
【００６７】（４）耐ＳＣ性（破壊偏平率）の測定 以下の各工程を順次行うことにより耐熱塩化ビニル系樹
脂管の破壊偏平率を測定した。 （ａ）耐熱塩化ビニル系樹脂管（外径２５〜２３ｍｍ、
内径１９〜２１ｍｍ）を軸方向長さ５ｃｍにカットす
る。 （ｂ）平行平板治具で耐熱塩化ビニル系樹脂管を鋏み、
管の外径の５％に相当する歪みを与えるまで外力を加え
管を偏平させる。 （ｃ）５％偏平させた状態で７リットルの円柱型容器
（直径１５０ｍｍ）の中央にパイプを吊り下げる。 （ｄ）容器内の底に混合溶剤（テトラヒドロフラン：メ
チルエチルケトン：シクロヘキサノン＝４０：１０：５
０）を２０ｇ入れたカップを置き、密閉し、−５℃の雰
囲気下に１７時間放置する。 （ｅ）取り出したサンプルを２３℃の通常大気中で２４
時間以上状態調節した後、２３℃雰囲気下、１０ｍｍ／
ｍｉｎの速度で、平行平板によりパイプの外直径の１／
２の距離（偏平率５０％）まで圧縮し、内面にクラック
が発生した時の偏平率を測定した。 （ｆ）内面クラックの発生は圧縮中に逐次目視観察し
た。 （ｇ）偏平率の計算は下記計算式（１）により行った。(4) Measurement of SC Resistance (Fracture Flatness) The fracture flatness of a heat-resistant vinyl chloride resin tube was measured by sequentially performing the following steps. (A) heat-resistant vinyl chloride resin tube (outer diameter 25 to 23 mm,
(Inner diameter: 19 to 21 mm) is cut to an axial length of 5 cm. (B) Scissors the heat-resistant vinyl chloride resin tube with a parallel plate jig,
An external force is applied to flatten the tube until a strain equivalent to 5% of the outside diameter of the tube is applied. (C) A pipe is hung at the center of a 7-liter cylindrical container (150 mm in diameter) in a state where the pipe is flattened by 5%. (D) A mixed solvent (tetrahydrofuran: methyl ethyl ketone: cyclohexanone = 40: 10: 5)
A cup containing 20 g of 0) is placed, sealed, and left in an atmosphere of -5 ° C for 17 hours. (E) Take out the sample in a normal atmosphere at 23 ° C. for 24 hours.
After conditioning for more than an hour, in an atmosphere of 23 ° C, 10 mm /
At a speed of min, the parallel plate makes 1 /
Compressed to a distance of 2 (a flatness of 50%), and the flatness when a crack occurred on the inner surface was measured. (F) The occurrence of inner surface cracks was visually observed sequentially during compression. (G) The calculation of the flattening rate was performed by the following formula (1).
【００６８】 偏平率＝〔（パイプの外直径ークラック発生時の平行平板距離）／（パイプの 外直径）〕×１００・・・（１）Flatness = [(outside diameter of pipe: parallel plate distance when cracks occur) / (outside diameter of pipe)] × 100 (1)
【００６９】なお、上記偏平率の最大値は５０％であ
り、本実施例及び本比較例において、破壊偏平率が５０
％と記載されているものは、上記の測定において割れな
かったものである。上記計算式（１）により計算した偏
平率の５個の平均値をサンプルの破壊偏平率とした。The maximum value of the flattening rate is 50%. In this embodiment and the comparative example, the breaking flattening rate is 50%.
Those described as% are those which did not crack in the above measurement. The average value of the five flatness factors calculated by the above equation (1) was taken as the fracture flattening factor of the sample.
【００７０】[0070]
【表１】 [Table 1]
【００７１】表１に示したように、実施例１の耐熱塩化
ビニル系樹脂管は、破壊時間１０００時間の破壊応力が
４．０ＭＰａ以上であるため高温下で長期間使用した際
の信頼性が高く、 うねりムラＷｃｔが１０．０μm 以下
であり、かつ、表面粗さＲｍａｘが２．０μｍ以下であ
るため、水等の滞留による細菌の繁殖の心配がなく、ま
た、破壊偏平率が５０％以上であるため、ＳＣの発生に
より、使用中に破壊に至る危険性が低い。そのため、給
湯用配管用途等に好適に用いることができる。As shown in Table 1, the heat-resistant vinyl chloride resin tube of Example 1 had a breaking stress of 4.0 MPa or more at a breaking time of 1000 hours, so that its reliability when used at high temperatures for a long period of time was low. It is high, the undulation unevenness Wct is 10.0 μm or less, and the surface roughness Rmax is 2.0 μm or less, so that there is no concern about breeding of bacteria due to stagnation of water and the like, and the fracture flattening rate is 50% or more. Therefore, there is a low risk of destruction during use due to generation of SC. Therefore, it can be suitably used for hot water supply piping applications and the like.
【００７２】表１に示したように、実施例２の耐熱塩化
ビニル系樹脂管は、破壊時間１０００時間の破壊応力が
４．０ＭＰａ以上であるため高温下で長期間使用した際
の信頼性が高く、 うねりムラＷｃｔが１０．０μm 以下
であり、かつ、表面粗さＲｍａｘが２．０μｍ以下であ
るため、水等の滞留による細菌の繁殖の心配がなく、ま
た、破壊偏平率が１０％以上であるため、ＳＣの発生に
より、使用中に破壊に至る危険性が低い。そのため、耐
熱管用途等に好適に用いることができる。As shown in Table 1, the heat-resistant vinyl chloride-based resin tube of Example 2 had a breaking stress of 4.0 MPa or more at a breaking time of 1000 hours, so that its reliability when used at high temperatures for a long period of time was low. It is high, the undulation unevenness Wct is 10.0 μm or less, and the surface roughness Rmax is 2.0 μm or less, so that there is no fear of breeding of bacteria due to stagnation of water and the like, and the fracture flattening rate is 10% or more. Therefore, there is a low risk of destruction during use due to generation of SC. Therefore, it can be suitably used for heat-resistant tubes.
【００７３】表１に示したように、実施例３の耐熱塩化
ビニル系樹脂管は、破壊時間１０００時間の破壊応力が
４．０ＭＰａ以上であるため高温下で長期間使用した際
の信頼性が高く、うねりムラＷｃｔが１０．０μm 以下
であり、かつ、表面粗さＲｍａｘが０．５μｍ以下であ
るため、水等の滞留による細菌の繁殖の心配がなく、ま
た、破壊偏平率が５０％以上であるため、ＳＣの発生に
より、使用中に破壊に至る危険性が低い。そのため、給
湯用途や超純水用配管用途等に好適に用いることができ
る。As shown in Table 1, the heat-resistant vinyl chloride resin pipe of Example 3 had a breaking stress of 1000 MPa or more at a breaking time of 1000 hours, so that its reliability when used at high temperatures for a long period of time was low. Since it is high, the undulation unevenness Wct is 10.0 μm or less, and the surface roughness Rmax is 0.5 μm or less, there is no fear of breeding of bacteria due to stagnation of water or the like, and the breaking flattening rate is 50% or more. Therefore, there is a low risk of destruction during use due to generation of SC. Therefore, it can be suitably used for hot water supply, piping for ultrapure water, and the like.
【００７４】表１に示したように、実施例４及び５の耐
熱塩化ビニル系樹脂管は、破壊時間１０００時間の破壊
応力が４．０ＭＰａ以上であるため高温下で長期間使用
した際の信頼性が高く、うねりムラＷｃｔが３０．０μ
m 以下であり、かつ、表面粗さＲｍａｘが３．０μｍ以
下であるため、製品としての外観を満足し、また、破壊
偏平率が１０％以上であるため、ＳＣの発生により、使
用中に破壊に至る危険性が低い。そのため、給湯用の耐
熱管用途等に好適に用いることができる。As shown in Table 1, the heat-resistant vinyl chloride resin tubes of Examples 4 and 5 had a breaking stress of 1000 MPa or more at a breaking time of 1000 hours, and thus were reliable when used at high temperatures for a long period of time. High waviness, undulation unevenness Wct is 30.0μ
m or less and the surface roughness Rmax is 3.0 μm or less, which satisfies the appearance as a product. Further, since the fracture flattening rate is 10% or more, it breaks during use due to generation of SC. The risk of reaching is low. Therefore, it can be suitably used for heat-resistant pipes for hot water supply.
【００７５】表１に示したように、比較例１及び３の耐
熱塩化ビニル系樹脂管は、破壊時間１０００時間の破壊
応力が４．０ＭＰａ未満であるため高温下で長期間使用
した際の信頼性に劣り、かつ、破壊偏平率が１０％未満
であるため、ＳＣの発生により、使用中に破壊に至る危
険性が高い。そのため、給湯用の耐熱管用途等に用いる
ことは困難である。As shown in Table 1, the heat-resistant vinyl chloride-based resin tubes of Comparative Examples 1 and 3 had a breaking stress of less than 4.0 MPa for a breaking time of 1000 hours, so that they could be used for a long time at high temperatures. Since it is inferior in property and the fracture flattening rate is less than 10%, there is a high risk of breakage during use due to generation of SC. Therefore, it is difficult to use it for heat-resistant pipes for hot water supply.
【００７６】表１に示したように、比較例２及び４の耐
熱塩化ビニル系樹脂管は、うねりムラＷｃｔが３０μm
を超え、かつ、表面粗さＲｍａｘが３．０μｍを超えて
いるため、水等の滞留による細菌の繁殖の危険性が高
く、しかも、製品としての外観を満足できない。そのた
め、給湯用や超純水用の耐熱管用途等に用いることは困
難である。As shown in Table 1, the heat-resistant vinyl chloride resin tubes of Comparative Examples 2 and 4 had a waviness unevenness Wct of 30 μm.
And the surface roughness Rmax exceeds 3.0 μm, there is a high risk of bacterial propagation due to stagnation of water and the like, and furthermore, the appearance as a product cannot be satisfied. Therefore, it is difficult to use it for heat pipes for hot water supply or ultrapure water.
【００７７】[0077]
【発明の効果】本発明の耐熱塩化ビニル系樹脂管は、上
述の構成からなるため、内外面の平滑性に優れ、高い長
期クリープ性と優れた耐ＳＣ性とを有する。As described above, the heat-resistant vinyl chloride resin tube of the present invention has excellent smoothness on the inner and outer surfaces, high long-term creep property and excellent SC resistance.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3H111 AA04 BA15 BA34 CB02 DA11 DB03 4F071 AA15X AA20X AA22X AA24 AA25X AA28X AF13 AF27 AF45 AH19 BB06 BC05 4J002 BD041 BD061 BD071 BD081 BD101 FD010 FD020 FD030 FD040 FD050 FD070 FD090 FD100 FD170 FD200 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H111 AA04 BA15 BA34 CB02 DA11 DB03 4F071 AA15X AA20X AA22X AA24 AA25X AA28X AF13 AF27 AF45 AH19 BB06 BC05 4J002 BD041 BD061 BD071 BD081 BD101 FD010 FD020 FD 010 FD FD 010 FD 020
Claims (5)
℃での長期内圧クリープ試験において、破壊時間１００
０時間における破壊応力が４．０ＭＰａ以上であり、管
内面のうねりムラＷｃｔが３０μm 以下であり、かつ、
管内面の表面粗さＲｍａｘが３μｍ以下であることを特
徴とする耐熱塩化ビニル系樹脂管。1. A method according to ASTM D 2837,
In a long-term internal pressure creep test at
The fracture stress at 0 hours is 4.0 MPa or more, the undulation unevenness Wct on the inner surface of the pipe is 30 μm or less, and
A heat-resistant vinyl chloride-based resin tube, wherein the surface roughness Rmax of the inner surface of the tube is 3 μm or less.
下であり、管内面の表面粗さＲｍａｘが３μｍ以下であ
り、かつ、５％偏平状態で接着剤雰囲気下に−５℃で、
１７時間放置した後の破壊偏平率が１０％以上であるこ
とを特徴とする耐熱塩化ビニル系樹脂管。2. The waviness unevenness Wct of the inner surface of the tube is 30 μm or less, the surface roughness Rmax of the inner surface of the tube is 3 μm or less, and 5% flattened at −5 ° C. in an adhesive atmosphere.
A heat-resistant vinyl chloride resin tube having a flattening rate of fracture of 10% or more after standing for 17 hours.
℃での長期内圧クリープ試験において、破壊時間１００
０時間における破壊応力が４．０ＭＰａ以上であり、管
内面のうねりムラＷｃｔが３０μm 以下であり、かつ、
５％偏平状態で接着剤雰囲気下に−５℃で、１７時間放
置した後の破壊偏平率が１０％以上であることを特徴と
する耐熱塩化ビニル系樹脂管。3. 90 according to ASTM D 2837.
In a long-term internal pressure creep test at
The fracture stress at 0 hours is 4.0 MPa or more, the undulation unevenness Wct on the inner surface of the pipe is 30 μm or less, and
A heat-resistant vinyl chloride resin tube having a flattening rate of 10% or more after standing at -5 ° C for 17 hours in an adhesive atmosphere in a 5% flat state.
℃での長期内圧クリープ試験において、破壊時間１００
０時間における破壊応力が４．０ＭＰａ以上であり、管
内面の表面粗さＲｍａｘが３μｍ以下であり、かつ、５
％偏平状態で接着剤雰囲気下に−５℃で、１７時間放置
した後の破壊偏平率が１０％以上であることを特徴とす
る耐熱塩化ビニル系樹脂管。4. A 90 according to ASTM D 2837.
In a long-term internal pressure creep test at
The fracture stress at 0 hours is 4.0 MPa or more, the surface roughness Rmax of the inner surface of the tube is 3 μm or less, and 5
A heat-resistant vinyl chloride-based resin tube having a flattening rate of 10% or more after standing at -5 ° C for 17 hours in an adhesive atmosphere in a flattened state.
℃での長期内圧クリープ試験において、破壊時間１００
０時間における破壊応力が４．０ＭＰａ以上であり、管
内面のうねりムラＷｃｔが３０μm 以下であり、管内面
の表面粗さＲｍａｘが３μｍ以下であり、かつ、５％偏
平状態で接着剤雰囲気下に−５℃で、１７時間放置した
後の破壊偏平率が１０％以上であることを特徴とする耐
熱塩化ビニル系樹脂管。5. A 90 according to ASTM D 2837.
In a long-term internal pressure creep test at
The fracture stress at 0 hours is 4.0 MPa or more, the undulation unevenness Wct of the inner surface of the tube is 30 μm or less, the surface roughness Rmax of the inner surface of the tube is 3 μm or less, and 5% flattened under an adhesive atmosphere. A heat-resistant vinyl chloride resin tube having a flattening rate of fracture of 10% or more after standing at -5 ° C for 17 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21112099A JP2000352483A (en) | 1999-04-08 | 1999-07-26 | Heat resistant vinyl chloride base resin pipe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10145399 | 1999-04-08 | ||
| JP11-101453 | 1999-04-08 | ||
| JP21112099A JP2000352483A (en) | 1999-04-08 | 1999-07-26 | Heat resistant vinyl chloride base resin pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000352483A true JP2000352483A (en) | 2000-12-19 |
Family
ID=26442326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21112099A Withdrawn JP2000352483A (en) | 1999-04-08 | 1999-07-26 | Heat resistant vinyl chloride base resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000352483A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002284947A (en) * | 2001-03-26 | 2002-10-03 | Sekisui Chem Co Ltd | Vinyl chloride-based resin composition |
| JP2002284950A (en) * | 2001-03-26 | 2002-10-03 | Sekisui Chem Co Ltd | Vinyl chloride-base resin composition |
| JP2003073518A (en) * | 2001-09-06 | 2003-03-12 | Sekisui Chem Co Ltd | Vinyl chloride based resin composition for regenerated pipe and regenerated pipe |
| JP2009223136A (en) * | 2008-03-18 | 2009-10-01 | Ube Nitto Kasei Co Ltd | Method for manufacturing intervention member for optical fiber cable, and intervention member |
| JP2009222131A (en) * | 2008-03-14 | 2009-10-01 | Furukawa Electric Co Ltd:The | Water stain deposition preventive resin pipe material |
| KR101453208B1 (en) * | 2013-09-17 | 2014-10-22 | 주식회사 고리 | Three-layer fire pipe |
| KR101453207B1 (en) * | 2013-09-17 | 2014-10-22 | 주식회사 고리 | Composition for a mono-layer fire pipe and mono-layer fire pipe formed by using the composition |
| WO2021201042A1 (en) * | 2020-03-31 | 2021-10-07 | 積水化学工業株式会社 | Chlorinated vinyl chloride resin |
-
1999
- 1999-07-26 JP JP21112099A patent/JP2000352483A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002284950A (en) * | 2001-03-26 | 2002-10-03 | Sekisui Chem Co Ltd | Vinyl chloride-base resin composition |
| JP2002284947A (en) * | 2001-03-26 | 2002-10-03 | Sekisui Chem Co Ltd | Vinyl chloride-based resin composition |
| JP4555494B2 (en) * | 2001-03-26 | 2010-09-29 | 積水化学工業株式会社 | Vinyl chloride resin composition |
| JP4714385B2 (en) * | 2001-09-06 | 2011-06-29 | 積水化学工業株式会社 | Vinyl chloride resin rehabilitation pipe |
| JP2003073518A (en) * | 2001-09-06 | 2003-03-12 | Sekisui Chem Co Ltd | Vinyl chloride based resin composition for regenerated pipe and regenerated pipe |
| JP2009222131A (en) * | 2008-03-14 | 2009-10-01 | Furukawa Electric Co Ltd:The | Water stain deposition preventive resin pipe material |
| JP2009223136A (en) * | 2008-03-18 | 2009-10-01 | Ube Nitto Kasei Co Ltd | Method for manufacturing intervention member for optical fiber cable, and intervention member |
| KR101453208B1 (en) * | 2013-09-17 | 2014-10-22 | 주식회사 고리 | Three-layer fire pipe |
| KR101453207B1 (en) * | 2013-09-17 | 2014-10-22 | 주식회사 고리 | Composition for a mono-layer fire pipe and mono-layer fire pipe formed by using the composition |
| WO2021201042A1 (en) * | 2020-03-31 | 2021-10-07 | 積水化学工業株式会社 | Chlorinated vinyl chloride resin |
| JP7016992B1 (en) * | 2020-03-31 | 2022-02-07 | 積水化学工業株式会社 | Chlorinated vinyl chloride resin |
| CN114929758A (en) * | 2020-03-31 | 2022-08-19 | 积水化学工业株式会社 | Chlorinated polyvinyl chloride resin |
| CN114929758B (en) * | 2020-03-31 | 2023-10-13 | 积水化学工业株式会社 | Chlorinated polyvinyl chloride resin |
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