WO2016133167A1 - Conduite composite renforcée par des fibres et système de conduite d'eau froide/chaude - Google Patents

Conduite composite renforcée par des fibres et système de conduite d'eau froide/chaude Download PDF

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Publication number
WO2016133167A1
WO2016133167A1 PCT/JP2016/054738 JP2016054738W WO2016133167A1 WO 2016133167 A1 WO2016133167 A1 WO 2016133167A1 JP 2016054738 W JP2016054738 W JP 2016054738W WO 2016133167 A1 WO2016133167 A1 WO 2016133167A1
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Prior art keywords
layer
reinforced composite
composite pipe
fiber
less
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PCT/JP2016/054738
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English (en)
Japanese (ja)
Inventor
三二　敏文
寺地　信治
雄亮 星野
伸太郎 梅山
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積水化学工業株式会社
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Priority claimed from JP2015101914A external-priority patent/JP6510885B2/ja
Priority claimed from JP2015101655A external-priority patent/JP6484106B2/ja
Application filed by 積水化学工業株式会社 filed Critical 積水化学工業株式会社
Priority to CN201680010751.9A priority Critical patent/CN107250640B/zh
Priority to AU2016220736A priority patent/AU2016220736B2/en
Priority to SG11201706694TA priority patent/SG11201706694TA/en
Priority to US15/552,252 priority patent/US10544886B2/en
Priority to KR1020177022898A priority patent/KR101993147B1/ko
Publication of WO2016133167A1 publication Critical patent/WO2016133167A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall

Definitions

  • the present invention relates to a fiber reinforced composite pipe and a cold / hot water piping system.
  • Polyolefin resin is relatively inexpensive and has excellent moldability, heat resistance, solvent resistance, mechanical properties, appearance, and the like. For this reason, polyolefin resin is processed into various molded products and used in many fields. For example, the composition containing the polyolefin-based resin is formed into an extruded product by extrusion molding and used as a deck material or the like. In addition, since polyolefin-based resins are also excellent in earthquake resistance, their use as gas pipes and water distribution pipes is increasing in recent years.
  • Patent Document 1 discloses a polyolefin resin tube.
  • Patent Document 2 discloses a fiber-reinforced synthetic resin pipe having a cylindrical shape. This pipe has a plurality of fiber reinforced resin layers, and the plurality of fiber reinforced resin layers are laminated in a cylindrical circumferential direction.
  • the fiber reinforced resin layer includes a glass fiber reinforced resin layer formed using glass fibers and a synthetic resin, and an organic nonwoven fabric layer formed using an organic nonwoven fabric and a synthetic resin.
  • Patent Document 3 discloses a molded body using a polyphenylene composite resin composition containing glass fiber or an inorganic filler.
  • the polyphenylene composite resin composition is 20 to 98% by weight of polyphenylene ether and at least one selected from the group consisting of polystyrene, polyphenylene sulfide, polyetherimide, polycarbonate and polyethylene (including HDPE, LDPE, LLDPE, VLDPE). 1 to 40% by weight of the seed resin and 1 to 40% by weight of glass fiber or inorganic filler.
  • the entire system is basically configured by the same kind of pipe connection.
  • dissimilar pipe connection is unavoidable due to restrictions on the lineup of products and costs, etc., but dissimilar pipe connection has great disadvantages in that construction is difficult, while homogenous pipe connection is easy to construct and The same type pipe connection is actively adopted because of its great merit in terms of mechanical characteristics.
  • Japanese Unexamined Patent Publication No. 2006-327154 Japanese Unexamined Patent Publication No. 2007-216555 International Publication No. 02/28971 Japanese Unexamined Patent Publication No. 2010-243129
  • An object of the present invention is to provide a fiber reinforced composite pipe as a multilayer pipe material having high strength and high dimensional stability and excellent workability.
  • a pipe material In the same type pipe connection as described in Patent Document 4, a pipe material must be selected by paying attention to characteristics advantageous for the use of the pipe system.
  • Piping typically has both advantageous and disadvantageous properties for piping system applications.
  • piping having good characteristics in terms of strength tends to be inferior in terms of workability
  • piping having good characteristics in terms of corrosion resistance tends to be inferior in terms of ease of handling. Therefore, a piping system configured by connecting pipes of the same kind cannot help but inherit characteristics that are advantageous to the use of the piping system as well as disadvantageous characteristics.
  • the temperature range exceeds 20 ° C.
  • an object of the present invention is also to provide a cold / hot water piping system having excellent dimensional stability and improved workability.
  • the present invention includes the following fiber-reinforced composite pipes.
  • the fiber-reinforced composite pipe of the present invention includes a tubular first layer containing a polyolefin resin, a tubular second layer containing a polyolefin resin, glass fiber, and a compatibilizing agent, and a tubular third layer containing a polyolefin resin.
  • the second layer is disposed outside the first layer
  • the third layer is disposed outside the second layer
  • the second layer has the second thickness.
  • the ratio of the total thickness of the first layer and the third layer is 0.3 or more and 0.8 or less
  • the content of the polyolefin-based resin is 45% by weight in 100% by weight of the second layer.
  • the content of the glass fiber is 15% by weight or more and 45% by weight or less
  • the content of the compatibilizer is 0.5% by weight or more and 10% by weight or less.
  • the fiber-reinforced composite pipe according to the present invention has high strength and high dimensional stability, and is excellent in workability.
  • the total wall thickness refers to the total thickness of the fiber-reinforced composite pipe.
  • the fiber-reinforced composite pipe of (1) may include a gas barrier layer, and the gas barrier layer may be disposed outside the third layer.
  • the fiber-reinforced composite pipe of (2) may include an adhesive layer, the adhesive layer may be disposed outside the third layer, and the gas barrier layer may be disposed outside the adhesive layer.
  • the cold / hot water piping system of this invention is a piping system for transporting cold / hot water whose temperature width is 20 degreeC or more.
  • the cold / hot water piping system of the present invention includes a fiber reinforced composite pipe containing a polyolefin resin and glass fiber, a metal reinforced composite pipe containing a polyolefin resin and a metal, a connection member connecting the fiber reinforced composite pipe and the metal reinforced composite pipe, including.
  • the coefficient of thermal expansion of the fiber reinforced composite tube is 10 ⁇ 10 ⁇ 5 / ° C. or less.
  • the capacity occupied by the fiber reinforced composite pipe is 70% or more of the total capacity of the fiber reinforced composite pipe and the metal reinforced composite pipe.
  • the cold / hot water piping system of the present invention is configured such that the low linear expansion fiber-reinforced composite pipe having a thermal linear expansion coefficient of 6 ⁇ 10 ⁇ 5 / ° C. or less occupies a capacity of 70% or more. Excellent dimensional stability against changes in temperature of cold / hot water being transported.
  • the workability of fiber reinforced composite pipes such as lightness and ease of cutting
  • the workability of metal reinforced composite pipes such as bending workability and ease of placement and connection in a narrow pipe space is also provided. Because it is equipped, it has improved workability as a whole piping system. Furthermore, since all the pipe lines excluding the joints are made of resin-based flexible pipes, they are excellent in earthquake resistance.
  • the fiber-reinforced composite pipe may include at least a tubular first layer, a second layer, and a third layer in this order in the direction from the axial center to the outer periphery.
  • the first layer and the third layer contain a polyolefin resin as a main component
  • the second layer contains a polyolefin resin and glass fibers.
  • the ratio of the second layer thickness to the entire thick wall of the fiber reinforced composite pipe is 0.3 or more.
  • the average fiber diameter of the glass fibers may be 5 ⁇ m or more and 20 ⁇ m or less.
  • the cold / hot water piping system of this invention is a piping system for transporting cold / hot water whose temperature width is 20 degreeC or more.
  • the cold / hot water piping system of the present invention connects the fiber reinforced composite pipe of any one of (1) to (3) above, a metal reinforced composite pipe containing a polyolefin resin and a metal, a fiber reinforced composite pipe, and a metal reinforced composite pipe. And a connecting member.
  • the coefficient of thermal expansion of the fiber reinforced composite tube is 10 ⁇ 10 ⁇ 5 / ° C. or less.
  • the capacity occupied by the fiber reinforced composite pipe is 70% or more of the total capacity of the fiber reinforced composite pipe and the metal reinforced composite pipe.
  • the cold / hot water piping system of the present invention is configured such that the low linear expansion fiber-reinforced composite pipe having a thermal linear expansion coefficient of 10 ⁇ 10 ⁇ 5 / ° C. or less occupies a capacity of 70% or more. Excellent dimensional stability against changes in temperature of cold / hot water being transported. And since a fiber reinforced composite pipe is comprised with the fiber reinforced composite pipe in any one of said (1) to (3), it has high intensity
  • the inner diameter of the fiber reinforced composite pipe may be 19 mm or more and the inner diameter of the metal reinforced composite pipe may be 75 mm or less.
  • the inner diameter of the fiber reinforced composite pipe may be 50 mm or more and the inner diameter of the metal reinforced composite pipe may be 50 mm or less. Furthermore, with the inner diameter of 50 mm as a boundary, a pipe portion having a larger diameter than 50 mm can be constituted by a fiber reinforced composite pipe, and a pipe portion having a smaller diameter than 50 mm can be constituted by a metal reinforced composite pipe. As a result, it is possible to more preferably obtain workability such as ease of bending by the metal-reinforced composite pipe and ease of arrangement and connection in a narrow pipe space.
  • connection member includes an electrofusion joint for connection to the fiber reinforced composite pipe, and a screw coupling portion for connection to the metal reinforced composite pipe. May be included.
  • a fiber reinforced composite pipe is provided as a multilayer pipe material having high strength and high dimensional stability and excellent workability.
  • the present invention also provides a cold / hot water piping system having excellent dimensional stability and improved workability.
  • FIG. 1 is a cross-sectional view schematically showing a fiber-reinforced composite pipe according to an embodiment of the present invention.
  • An example of the cold / hot water piping system of this invention is shown typically. It is a typical exploded view which shows the connection of the fiber reinforced composite pipe and metal reinforced composite pipe in FIG. It is sectional drawing which shows typically the fiber reinforced composite pipe
  • FIG. 1 is a cross-sectional view schematically showing a fiber-reinforced composite pipe according to an embodiment of the present invention.
  • a fiber reinforced composite pipe 200 (multilayer molded body) shown in FIG. 1 includes a tubular first layer 210 (inner layer / molded body) and a tubular second layer 220 (intermediate layer / molded body) disposed outside the first layer 210.
  • the second layer 220 is laminated on the outer surface of the first layer 210, and the third layer 230 is laminated on the outer surface of the second layer 220, so that the first layer 210 and the outer peripheral side from the axial center side.
  • the second layer 220 and the third layer 230 are laminated in this order.
  • the second layer 220 may be laminated in contact with the outer surface of the first layer 210, and the third layer 230 may be laminated in contact with the outer surface of the second layer 220.
  • the first layer 210 includes a polyolefin resin.
  • the first layer 210 does not substantially contain glass fibers as in the second layer 220 described later.
  • the second layer 220 includes a polyolefin resin and glass fiber. That is, the second layer 220 is a molded body of a polyolefin resin composition containing a polyolefin resin and glass fibers.
  • the fiber reinforced composite tube 200 is imparted with a low linear expansion performance, and good dimensional stability is obtained.
  • the second layer 220 may further contain a compatibilizing agent.
  • the third layer 230 includes a polyolefin resin. Similar to the first layer 210, the third layer 230 is substantially free of glass fibers.
  • the entire fiber reinforced composite pipe 200 has flexibility, for example, when used in a cold / hot water piping system described later. Good earthquake resistance can be obtained for the system.
  • the fiber reinforced composite tube 200 may further include a tubular adhesive layer 240 and a gas barrier layer 250 on the outside of the first layer 210, the second layer 220, and the third layer 230, or may not include them.
  • the adhesive layer 240 and the gas barrier layer 250 are further included, the adhesive layer 240 may be laminated on the outer surface of the third layer 230, and the gas barrier layer 250 may be laminated on the outer surface of the adhesive layer 240.
  • the adhesive layer 240 may be laminated in contact with the outer surface of the third layer 230, and the gas barrier layer 250 may be laminated in contact with the outer surface of the adhesive layer 240.
  • the gas barrier layer 250 may be laminated inside the first layer 210 via an adhesive layer.
  • the third layer 230 is the outermost layer of the line-reinforced composite tube 200, and the adhesive layer, the gas barrier layer 250, the adhesive layer, and the innermost layer are laminated in this order on the inner surface of the first layer 210.
  • This innermost layer is a layer containing a polyolefin resin that protects the gas barrier layer from cold and hot water.
  • the gas barrier layer 250 includes a gas barrier resin.
  • the gas barrier layer 250 is provided in order to improve the barrier property against the gas contacting the outer peripheral surface of the fiber reinforced composite pipe 200.
  • the adhesive layer 240 includes an adhesive resin.
  • the adhesive layer 240 is provided to improve the adhesion between the third layer 230 and the gas barrier layer 250.
  • the adhesive layer 240 is preferably tubular, specifically, tubular in contact with the entire outer peripheral surface of the third layer 230, but is not limited to this aspect.
  • the outer peripheral surface may be partially disposed in the axial direction and / or the circumferential direction.
  • the first layer 210 is the innermost layer of the fiber reinforced composite tube 200 and is in contact with an object (fluid) transported through the fiber reinforced composite tube 200.
  • the fluid with which the first layer 210 is in contact is cold / hot water.
  • the gas barrier layer 250 is the outermost layer of the fiber reinforced composite pipe 200 and is exposed to the external environment.
  • the third layer 230 is the outermost layer of the multilayer molded body.
  • the first layer 210, the second layer 220, and the third layer 230 are laminated so as to be in direct contact with each other, but the present invention is not limited to this mode.
  • the first layer 210 and the second layer 220 and / or the second layer 220 and the third layer 230 may be indirectly laminated through, for example, an adhesive layer.
  • the fiber reinforced composite tube 200 is made of resin and glass fiber as described above, and does not include a metal layer like the metal reinforced composite tube 300. Since the fiber reinforced composite pipe 200 is light and easy to cut, it is excellent in workability.
  • the ratio (R2) of the thickness of the second layer 220 to the total thickness of the first layer 210, the second layer 220, and the third layer 230 is, for example, 0.3 or more, 0.8 It may be the following.
  • the ratio (R2) is preferably 0.4 or more, more preferably 0.45 or more, still more preferably 0.5 or more, particularly preferably 0.55 or more, and preferably 0.75 or less.
  • the ratio (R2) is not less than the above lower limit, the dimensional stability is further improved.
  • the ratio (R2) is not more than the above upper limit, the fusibility and workability are further enhanced, and the impact resistance and the earthquake resistance are further enhanced.
  • the ratio (R1) of the thickness of the first layer 210 to the total thickness of the first layer 210, the second layer 220, and the third layer 230 is preferably 0.1 or more, and more preferably. Is 0.12 or more, preferably 0.4 or less, more preferably 0.35 or less, further preferably 0.3 or less, particularly preferably 0.25 or less, and most preferably 0.23 or less.
  • the ratio (R1) is equal to or greater than the lower limit, the fusion property and workability are further enhanced, and the impact resistance and the earthquake resistance are further enhanced.
  • the ratio (R1) is not more than the above upper limit, the dimensional stability is further improved.
  • the ratio (R3) of the thickness of the third layer 230 to the total thickness of the first layer 210, the second layer 220, and the third layer 230 is preferably 0.1 or more, and more preferably. Is 0.12 or more, preferably 0.4 or less, more preferably 0.35 or less, still more preferably 0.3 or less, particularly preferably 0.25 or less, and most preferably 0.23 or less.
  • the ratio (R3) is equal to or more than the lower limit, the fusion property and the workability are further improved, and the impact resistance and the earthquake resistance are further improved.
  • the third layer 230 is the outermost layer, so that the reliability of bonding is further enhanced when performing electrofusion bonding described later. Become.
  • the ratio (R3) is not more than the above upper limit, the dimensional stability is further improved.
  • the total thickness of the first layer 210, the second layer 220, and the third layer 230 is preferably 1.5 mm or more, more preferably 3.5 mm or more, preferably 60 mm or less, more preferably 35 mm or less.
  • the thickness is not less than the above lower limit, rigidity, pressure resistance, and impact resistance are further enhanced.
  • the thickness is less than or equal to the above upper limit, lightness, secondary workability, and formability are further enhanced.
  • the total of the other layers may be configured to be, for example, not less than 0.002 and not more than 0.2, preferably not less than 0.003 and not more than 0.1, as a ratio to the thickness of the entire fiber reinforced composite tube 200.
  • the total thickness of the other layers is equal to or more than the above lower limit, the characteristics of the other layers can be effectively imparted to the fiber-reinforced composite pipe 200.
  • the total thickness of the adhesive layer 240 and the gas barrier layer 250 may be not less than 0.125 mm and not more than 0.4 mm.
  • the thickness of the adhesive layer 240 is preferably 50 ⁇ m or more, more preferably 75 ⁇ m or more, preferably 200 ⁇ m or less, more preferably 150 ⁇ m or less.
  • the thickness of the adhesive layer 240 is not less than the above lower limit, the thickness control is further facilitated, and the adhesiveness is further enhanced.
  • the thickness of the adhesive layer 240 is not more than the above upper limit, the amount of material used is reduced, and the material cost is low and light.
  • the thickness of the gas barrier layer 250 is preferably 75 ⁇ m or more, more preferably 100 ⁇ m or more, preferably 200 ⁇ m or less, more preferably 150 ⁇ m or less.
  • the thickness of the gas barrier layer 250 is not less than the above lower limit, the thickness of the gas barrier layer 250 can be easily controlled, and the gas barrier property is further enhanced.
  • the thickness of the gas barrier layer 250 is not more than the above upper limit, the amount of material used is reduced, and the material cost is low and light.
  • Electrofusion bonding may be performed after exposing 230.
  • the content of the polyolefin resin may be 45% by weight or more and 84% by weight or less, the content of the glass fiber may be 15% by weight or more and 45% by weight or less,
  • the compatibilizer may be 0.5% by weight or more and 10% by weight or less.
  • the content of the polyolefin resin in 100% by weight of the second layer 220 is preferably 50% by weight or more, more preferably 57% by weight or more, preferably 79% by weight or less, more preferably 73% by weight or less. .
  • the content of the polyolefin resin is 79% by weight or less in 100% by weight of the second layer 220, the dimensional stability is further enhanced.
  • the content of the glass fiber in 100% by weight of the second layer 220 is preferably 20% by weight or more, more preferably 25% by weight or more, preferably 40% by weight or less, more preferably 35% by weight or less. In particular, when the glass fiber content is 40% by weight or less in 100% by weight of the second layer 220, the creep performance is further enhanced.
  • the content of the compatibilizer is preferably 1% by weight or more, more preferably 2% by weight or more, and preferably 8% by weight or less. In particular, when the content of the compatibilizer is 10% by weight or less in 100% by weight of the second layer 220, the creep performance is further improved.
  • the content of the compatibilizer is 10% by weight or less in 100% by weight of the second layer 220, the dimensional stability tends to be further enhanced.
  • 100% by weight of the second layer 220 the content of the polyolefin resin is 50% by weight or more and 79% by weight or less
  • the content of the glass fiber is 20% by weight or more and 40% by weight or less
  • the compatibilizing agent The content of may be 1 wt% or more and 10 wt% or less.
  • the preferable minimum and upper limit of each content of the said polyolefin resin, the said glass fiber, and the said compatibilizer in 100 weight% of polyolefin resin composition for forming the said 2nd layer 220 are said 2nd. It is the same as the preferable minimum and upper limit of each content of the said polyolefin resin in the layer 220, the said glass fiber, and the said compatibilizer.
  • the creep performance and the earthquake resistance are further improved.
  • the content of the polyolefin resin is not more than the above upper limit
  • the dimensional stability is further improved.
  • the glass fiber content is at least the above lower limit
  • the dimensional stability is further improved.
  • the creep performance becomes even better.
  • the content of the compatibilizer is not less than the above lower limit
  • the compatibility of each component is increased and the pressure resistance is further increased.
  • the content of the compatibilizer is not more than the above upper limit, the creep performance is further improved.
  • the content of the polyolefin resin is preferably 90% by weight or more, more preferably 95% by weight or more, and preferably 100% by weight (total amount) or less.
  • the content of the polyolefin-based resin is preferably 90% by weight or more, more preferably 95% by weight or more, and preferably 100% by weight (total amount) or less.
  • the polyolefin resin used for the first layer 210, the second layer 220, and the third layer 230 is not particularly limited, and a known polyolefin resin can be used. As for polyolefin resin, only 1 type may be used and 2 or more types may be used together.
  • the polyolefin resin used for each of the first layer 210, the second layer 220, and the third layer 230 may be the same resin or different resins. In consideration of adhesion between layers, it is preferable that the same resin is used for the layers adjacent to each other.
  • polyolefin resins examples include polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, and ethylene- ⁇ -olefin copolymer. From the viewpoint of further effectively increasing the strength, dimensional stability and high-temperature elongation of the fiber-reinforced composite pipe 200 and / or from the viewpoint of further effectively improving the earthquake resistance due to flexibility, polyethylene or polypropylene is preferable. Polyethylene is more preferable.
  • PE polyethylene
  • LDPE low density polyethylene
  • PP polypropylene
  • PP polypropylene
  • PP polybutene-1.
  • the ethylene- ⁇ -olefin copolymer is about several mol% of ⁇ -olefin such as propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene or 1-octene with respect to ethylene. It is particularly preferable that the copolymer be copolymerized at a ratio of
  • the polyolefin resin has a constant stress value of 10.0 MPa or more at which the tube does not break for 50 years at 20 ° C., based on the long-term hydraulic strength obtained according to ISO / TR9080. More preferably, it is compatible with PE100.
  • the fiber length of the glass fiber contained in the second layer 220 is preferably 0.05 mm or more, more preferably 0.1 mm or more, still more preferably 0.3 mm or more, preferably 10 mm or less, in terms of the length before molding.
  • the length may be obtained by molding a glass fiber of preferably 9 mm or less, more preferably 6 mm or less.
  • the fiber length of the glass fiber contained in the second layer 220, which is a molded body may be maintained before the molding process, or may be less than 100% of the fiber length before the molding process. When it becomes shorter than the length before forming, it may be shortened to a length of 0.06% or more and 10% or less.
  • the fiber length of the glass fiber contained in the 2nd layer 220 may be 0.002 mm or more and 0.3 mm or less, for example.
  • the fiber length of the glass fiber is not less than the above lower limit and not more than the above upper limit, the strength, dimensional stability, and elongation at high temperature of the multilayer tube material are effectively increased.
  • the polyolefin resin composition for forming the second layer 220 includes glass fibers having the above-described preferable fiber length. It is preferable that the 2nd layer 220 is obtained by shape
  • the fiber length means an average length of a plurality of glass fibers included in the second layer 220. Specifically, it may be an average value of fiber lengths of 100 glass fibers randomly selected from the glass fibers included in the second layer 220.
  • the fiber diameter of the glass fibers contained in the second layer 220 is preferably 1 ⁇ m or more, more preferably 5 ⁇ m or more, preferably 30 ⁇ m or less, more preferably 20 ⁇ m or less, and even more preferably 15 ⁇ m or less.
  • the fiber diameter of the glass fiber is not less than the above lower limit and not more than the above upper limit, the strength, dimensional stability, and elongation at high temperature of the multilayer tube material are effectively increased.
  • the polyolefin resin composition for forming the second layer 220 includes glass fibers having the above-described preferable fiber diameter. It is preferable that the 2nd layer 220 is obtained by shape
  • the fiber diameter is an average value of the maximum diameters of the plurality of glass fibers included in the second layer 220. Specifically, it may be an average value of the maximum diameters of 100 glass fibers randomly selected from the glass fibers included in the second layer 220.
  • the glass fiber may be surface-treated.
  • the surface treatment agent include methacryl silane, acrylic silane, amino silane, imidazole silane, vinyl silane, and epoxy silane. Aminosilane is preferred.
  • the glass fiber is preferably surface-treated with aminosilane because it is more excellent due to the effects of the present invention.
  • compatibilizer examples include maleic acid-modified polyolefin, silane-modified polyolefin, and chlorinated polyolefin. These compatibilizers are distinguished from the polyolefin resins described in the above-mentioned section of the polyolefin resin in terms of the configuration of the present invention. As for a compatibilizing agent, only 1 type may be used and 2 or more types may be used together.
  • the compatibilizer is preferably maleic acid-modified polyolefin or silane-modified polyolefin.
  • Adhesive resin examples of the adhesive resin constituting the adhesive layer 240 include rubber-based hot melt adhesives and modified polyolefins (particularly modified polyethylene and modified polypropylene). Examples of the modified polyolefin include acid-modified polyolefin and silane-modified polyolefin. Examples of the modification of the modified polyolefin include modification by grafting and copolymerization.
  • the acid-modified polyolefin is a polyolefin-based resin modified with an unsaturated carboxylic acid.
  • Examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, maleic acid, nadic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, sorbic acid, mesaconic acid, angelic acid, and phthalic acid.
  • Examples of the derivatives include acid anhydrides, esters, amides, imides, metal salts, and the like.
  • maleic anhydride, itaconic anhydride, citraconic anhydride, nadic anhydride, phthalic anhydride, methyl acrylate examples thereof include methyl methacrylate, ethyl acrylate, butyl acrylate, maleic acid monoethyl ester, acrylamide, maleic acid monoamide, maleimide, N-butylmaleimide, sodium acrylate, and sodium methacrylate.
  • unsaturated dicarboxylic acids and derivatives thereof are preferable, and maleic anhydride and phthalic anhydride are particularly preferable.
  • Modified polyolefin may be used individually by 1 type, and may use 2 or more types together.
  • gas barrier resin examples of the gas barrier resin constituting the gas barrier layer 250 include resins such as polyvinyl alcohol (PVA), ethylene vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), and polyacrylonitrile (PAN). .
  • PVA polyvinyl alcohol
  • EVOH ethylene vinyl alcohol copolymer
  • PVDC polyvinylidene chloride resin
  • PAN polyacrylonitrile
  • the first layer 210, the second layer 220, the third layer 230, the adhesive layer 240, and the gas barrier layer 250 may each include a thermoplastic resin other than the polyolefin-based resin.
  • the content of the thermoplastic resin other than the polyolefin resin in the polyolefin resin composition is more than the content of the polyolefin resin in the polyolefin resin composition.
  • a small amount that is, less than 50% of the entire resin component is preferable.
  • the first layer 210, the second layer 220, and the third layer 230 are Each preferably contains an antioxidant.
  • antioxidant only 1 type may be used and 2 or more types may be used together.
  • antioxidants examples include hindered phenol antioxidants, phosphorus antioxidants, sulfur antioxidants, amine antioxidants, and lactone antioxidants.
  • hindered phenol antioxidants include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], thiodiethylenebis [3- (3,5-di-tert- Butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, N, N′-hexane-1,6-diylbis [3- (3 5-di-tert-butyl-4-hydroxyphenyl) propionamide], benzenepropanoic acid, 3,5-bis (1,1-dimethylethyl) -4-hydroxy, C7-C9 side chain alkyl ester, 3,3 ', 3 ′′, 5,5 ′, 5 ′′ -hexa-tert-butyl-a, a ′, a ′′-(mesitylene-2 4,
  • Phosphorus antioxidants include tris (2,4-di-tert-butylphenyl) phosphite, tris [2-[[2,4,8,10-tetra-tert-butyldibenzo [d, f] [ 1,3,2] dioxaphosphine-6-yl] oxy] ethyl] amine, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis [2,4-bis (1 , 1-Dimethylethyl) -6-methylphenyl] ethyl ester phosphorous acid and tetrakis (2,4-di-tert-butylphenyl) (1,1-biphenyl) -4,4′-diylbisphosphonite Etc.
  • lactone antioxidant examples include a reaction product of 3-hydroxy-5,7-di-tert-butyl-furan-2-one and o-xylene.
  • the first layer 210, the second layer 220, and the third layer 230 are provided.
  • the antioxidant is preferably a phenol-based antioxidant, and more preferably a hindered phenol-based antioxidant. Only 1 type may be used for a phenolic antioxidant and a hindered phenolic antioxidant, and 2 or more types may be used together.
  • the antioxidant is 3- (3,5-di-tert. -Butyl-4-hydroxyphenyl) stearyl propionate or 2,4,6-tris (3 ′, 5′-di-tert-butyl-4′-hydroxybenzyl) mesitylene, preferably the polyolefin resin
  • the composition comprises stearyl 3- (3,5-di-tert-butyl-4-hydroxyphenyl) stearyl propionate or 2,4,6-tris (3 ′, 5′-di-tert-butyl-4′-hydroxy Bencyl) mesitylene is preferred.
  • the contents of the antioxidant, the phenolic antioxidant, and the hindered phenolic antioxidant are each preferably 0.01% by weight. % Or more, more preferably 0.1% by weight or more, preferably 5% by weight or less, more preferably 1% by weight or less, and still more preferably 0.5% by weight or less.
  • the content of the antioxidant, the phenolic antioxidant, and the hindered phenolic antioxidant is equal to or more than the above lower limit, the durability of the fiber-reinforced composite pipe 200 at a high temperature is further increased, and the above upper limit.
  • the content exceeds 50% the durability of the fiber reinforced composite pipe 200 at high temperatures does not change. Therefore, when the content is not more than the above upper limit, use of an excessive antioxidant can be suppressed.
  • the first layer 210, the second layer 220, and the third layer 230 may contain additives such as a cross-linking agent, a copper damage inhibitor, a lubricant, a light stabilizer, and a pigment as necessary.
  • crosslinking agent examples include organic peroxides.
  • examples of the organic peroxide include dicumyl peroxide, diisopropylbenzene hydroperoxide, and 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne.
  • a crosslinking agent only 1 type may be used and 2 or more types may be used together.
  • the amount of organic peroxide used is not particularly limited.
  • the content of the organic oxide is preferably 0.01 parts by weight or more, preferably 2 parts by weight or less, more preferably 1 part by weight or less based on 100 parts by weight of the polyolefin resin. It is.
  • the lubricant is not particularly limited, and examples thereof include a fluorine-based lubricant, a paraffin wax-based lubricant, and a stearic acid-based lubricant. Only 1 type may be used for a lubricant and 2 or more types may be used together.
  • the amount of lubricant used is not particularly limited.
  • the content of the lubricant is preferably 0.01 parts by weight or more and preferably 3 parts by weight or less with respect to 100 parts by weight of the polyolefin resin.
  • the light stabilizer is not particularly limited, and examples thereof include salicylic acid ester-based, benzophenone-based, benzotriazole-based and cyanoacrylate-based ultraviolet absorbers, hindered amine-based light stabilizers, and the like. Only one type of light stabilizer may be used, or two or more types may be used in combination.
  • the pigment is not particularly limited, and examples thereof include organic pigments such as azo, phthalocyanine, selenium, and dye lake, and oxides, molybdenum chromate, sulfide-selenide, and ferrocyanide.
  • organic pigments such as azo, phthalocyanine, selenium, and dye lake, and oxides, molybdenum chromate, sulfide-selenide, and ferrocyanide.
  • An inorganic pigment etc. are mentioned.
  • the pigment only 1 type may be used and 2 or more types may be used together.
  • the coefficient of thermal expansion of the fiber reinforced composite tube 200 is 11 ⁇ 10 ⁇ 5 / ° C. or less, more preferably 10 ⁇ 10 ⁇ 5 / ° C. or less, still more preferably 6 ⁇ 10 ⁇ 5 / ° C. or less, and further preferably 5.5. ⁇ 10 ⁇ 5 / ° C. or less, even more preferably 5 ⁇ 10 ⁇ 5 / ° C. or less, particularly preferably 4.5 ⁇ 10 ⁇ 5 / ° C. or less, and most preferably 4 ⁇ 10 ⁇ 5 / ° C. or less.
  • the fiber reinforced composite tube 200 preferably has a lower coefficient of thermal expansion.
  • the fiber-reinforced composite pipe 200 has a low coefficient of thermal expansion, thermal expansion and contraction is difficult to occur. Therefore, generation
  • the coefficient of thermal expansion of the fiber reinforced composite pipe 200 is low, heat is applied to cold / hot water having a temperature range of 20 ° C. or more flowing through the fiber reinforced composite pipe 200 when applied to a cold / hot water piping system described later. Expansion and contraction is difficult to occur.
  • the coefficient of thermal expansion is measured as follows.
  • the fiber reinforced composite tube 200 is cut so that the length in the axial direction is 1 m, and an evaluation sample is obtained.
  • the obtained evaluation sample is stored at 60 ° C. (Thot) for 2 hours, and the axial length (Lhot) at 60 ° C. immediately after storage is measured.
  • the same evaluation sample is stored at 5 ° C. (Tcool) for 2 hours, and the axial length (Lcool) at 5 ° C. immediately after storage is measured.
  • the obtained value is substituted into Equation 1 below to calculate the coefficient of thermal expansion.
  • the circumferential stress is 5.0 MPa for 1000 hours or more, more preferably 5.1 MPa for 1000 hours or more, and further preferably 5.2 MPa for 1000 hours or more. Particularly preferably, the pressure is 5.5 MPa and 1000 hours or longer.
  • the time in the hot internal pressure creep performance is the fracture time. It is preferable that the creep performance at high temperature of the fiber-reinforced composite pipe 200 is higher. When the creep performance at a high temperature of the fiber reinforced composite pipe 200 is high, the applicable range is widened as a pipe through which a high temperature fluid flows. Moreover, it becomes more useful as a cold / hot water pipe by satisfying both linear expansion performance and creep performance.
  • the fracture mode is preferably somewhat brittle, more preferably ductile cracking.
  • the hot internal pressure creep performance at 80 ° C. is tested at 80 ° C. using a hot internal pressure creep tester.
  • An example of the hot internal pressure creep tester is a tester manufactured by Condo Science. A method in which a fiber reinforced composite tube 200 cut to a length of 50 cm is placed in a constant temperature water bath adjusted to 80 ° C., and a desired circumferential stress is set by applying water pressure using a dedicated sealing plug jig. .
  • the fiber reinforced composite tube 200 can be formed by co-extrusion by preparing resin compositions for producing the first layer 210, the second layer 220, the third layer 230, the adhesive layer 240, and the gas barrier layer 250, respectively. . It does not specifically limit as a molding machine, A single screw extruder, a biaxial different direction parallel extruder, a biaxial different direction conical extruder, a biaxial same direction extruder, etc. are mentioned. The mold to be shaped, the resin temperature, etc. are not particularly limited.
  • FIG. 2 An example of the cold / hot water piping system of this invention is shown typically.
  • the cold / hot water pipe system 100 shown in FIG. 2 is used for the cold / hot water pipe of an air-conditioning apparatus.
  • the cold / hot water piping system 100 includes a fiber reinforced composite pipe 200a and a metal reinforced composite pipe 300a.
  • the fiber reinforced composite pipe 200a occupies 70% or more of the total capacity of the capacity of the fiber reinforced composite pipe 200a and the capacity of the metal reinforced composite pipe 300a. Since the fiber reinforced composite pipe 200a is excellent in dimensional stability, the temperature of the cold / hot water to be transported is configured by configuring the cold / hot water piping system 100 so that the capacity of the fiber reinforced composite pipe 200a occupies most of the total capacity. Excellent dimensional stability against changes.
  • the fiber reinforced composite pipe 200a is excellent in workability due to its light weight and easy cutting.
  • the metal-reinforced composite pipe 300a has excellent workability due to its excellent bending workability and easy installation and connection even when the piping space is narrow. In the cold / hot water pipe system 100, these excellent workability synergistically improves the workability as a whole. Furthermore, since both the fiber reinforced composite pipe 200a and the metal reinforced composite pipe 300a are resin-based flexible pipes, the entire cold / hot water pipe piping system 100 is also excellent in earthquake resistance.
  • the temperature range of the cold / hot water transported in the cold / hot water piping system 100 is 20 ° C. or more.
  • the upper limit within this temperature range is not particularly limited because it varies depending on the heat-resistant temperature of the constituent resin of the fiber reinforced composite pipe 200a and the metal reinforced composite pipe 300a, but is, for example, 105 ° C, preferably 95 ° C, more preferably 75 ° C. More preferably, it may be 55 ° C.
  • the specific temperature of the cold / hot water is not particularly limited because it varies depending on the heat resistance temperature of the constituent resin of the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a. For example, in the case of a polypropylene resin, it may be ⁇ 5 ° C. or higher and 90 ° C. or lower or ⁇ 5 ° C. or higher and 100 ° C. or lower.
  • the cold / hot water piping system 100 includes a hot water boiler 410, a refrigerator (in this embodiment, an absorption refrigerator) 420, a fan coil unit 430, and an expansion tank 440, and a pipe for transporting cold / hot water entering and exiting the fan coil unit 430.
  • the entire path is composed of a fiber reinforced composite tube 200a and a metal reinforced composite tube 300a.
  • a pipe with an arrow indicating the direction of the cold / hot water toward the fan coil unit 430 indicates a forward path
  • a pipe with an arrow indicating the direction of the cold / hot water exiting the fan coil unit 430 is a return path. Indicates.
  • the metal reinforced composite pipe 300a constitutes a pipe connected to a device (fan coil unit 430 having a built-in coil in the present embodiment) including a folded portion of the forward / backward passage of the cold / hot water. Is preferred.
  • the metal-reinforced composite pipe 300a is connected to the fan coil unit 430 in both the forward path and the return path. Since the fan coil unit 430 including the return part of the cold / hot water return path and the return path is disposed in a narrow pipe space (for example, the ceiling back), connecting with the metal reinforced composite pipe 300a is a work such as bending workability. From the viewpoint of sex.
  • the metal reinforced composite pipe 300 a connected to the fan coil unit 430 is connected to the fiber reinforced composite pipe 200 a that communicates with the hot water boiler 410 or the refrigerator 420.
  • a fiber reinforced composite branched from the fiber reinforced composite pipe 200a by a cheese-type joint As a connection mode between the fiber reinforced composite pipe 200a and the metal reinforced composite pipe 300a connected to the fan coil unit 430, as shown in FIG. 2, a fiber reinforced composite branched from the fiber reinforced composite pipe 200a by a cheese-type joint.
  • the metal reinforced composite pipe 300a connected to the fan coil unit 430 may be coupled to the pipe 200a.
  • the cold / hot water piping system 100 of this embodiment is a two-pipe cold / hot water system, and the metal reinforced composite pipe 300a and the fiber reinforced composite pipe 200a connected thereto are used for transporting cold water or hot water. Used.
  • the fiber reinforced composite pipe 200a is branched and communicated with a hot water pipe 510 connected to the hot water boiler 410 and a cold water pipe 520 connected to the refrigerator 420 by a three-way valve.
  • the cold / hot water piping system 100 further includes a cooling tower 450, and is connected to the refrigerator 420 by a cold water pipe 550.
  • the hot water pipe 510, the cold water pipe 520, and the cold water pipe 550 are not necessarily configured by the fiber reinforced composite pipe 200a because the temperature difference between the hot water or the cold water to be transported is small.
  • hot water higher than expected may flow in the hot water pipe 510, and the temperature of the pipe may vary greatly between when the air conditioning is stopped and when it is activated.
  • the cold water pipes 520 and 550 are warmed by the outside air temperature when the air conditioning is stopped, and the cold water pipes 520 and 550 are cooled when the air conditioning is activated.
  • the normal water pipe (not having a fiber reinforced resin layer), such as when the air conditioning is stopped, the hot water pipe 510 is cooled by the outside air temperature, and when the air conditioning is activated, the hot water pipe 510 is warmed.
  • the resin tube is composed of a fiber-reinforced composite tube 200a.
  • a heat source is selected from a refrigerator, a heat pump, a boiler, etc.
  • an air-conditioner is an air handling unit
  • the hot / cold water piping system may be an arbitrary combination selected from a fan coil unit, an induction unit, and the like.
  • the present invention is particularly useful when a fan coil unit used in a portion where many fine branches exist is selected as an air conditioner.
  • the cold / hot water piping system of the present invention includes a hot water / water supply piping system for hot water heaters such as gas water heaters and hot water boilers, a hot water / water supply piping system for apartment houses and detached houses, a humidification / water supply piping system for humidifiers, ice
  • the present invention can also be applied to a piping system of a heat storage type heat exchanger.
  • a two-pipe cold water pipe system is illustrated, but the present invention may be a four-pipe cold water pipe system.
  • the cold water pipe and the hot water pipe are independent and are not shared, the temperature of the pipe varies greatly between when the air conditioning is stopped and when the air is turned on.
  • a fiber reinforced composite tube 200a is used.
  • the metal reinforced composite pipe 300a is illustrated as an example in which the branch pipe from the fiber reinforced composite pipe 200a is communicated with the fan coil unit 430.
  • the present invention provides a space with a narrow pipe space (for example, The present invention is also applied to a mode in which a part of piping is repaired with a metal-reinforced composite pipe 300 in a ceiling back, a wall back, and the like.
  • an elbow branched from the fiber reinforced composite pipe 200a by a cheese-type joint is used.
  • the metal reinforced composite pipe 300a may be connected.
  • the metal-reinforced composite pipe 300a may be directly connected to the cheese type joint.
  • both the fiber reinforced composite pipe 200a and the metal reinforced composite pipe 300a included in the cold / hot water piping system 100 include a heat insulating material.
  • the present invention is not limited to this embodiment, and either one or both of the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a is a fiber reinforced composite tube 200 containing no heat insulating material (described above), a metal reinforced composite composite. It may be replaced with a tube 300 (described later).
  • FIG. 3 the typical exploded view of the connection part of the fiber reinforced composite pipe and the metal reinforced composite pipe in the cold / hot water piping system of this invention is shown.
  • the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a can be connected via an electrofusion joint 290 and a caulking joint 390.
  • the terminal part of the fiber reinforced composite pipe 200a and the terminal part of the metal reinforced composite pipe 300a connected to each joint are respectively a heat insulating material (a heat insulating material 280 in FIG. 5 is not present.
  • the end portion of the fiber reinforced composite tube 200a is joined to the electrofusion joint 290.
  • the electrofusion joint 290 has an electrofusion joint and a screw connection.
  • the joint portion for electrofusion joins the fiber reinforced composite tube 200 by being electrofused in a state of being extrapolated to the end portion of the fiber reinforced composite tube 200a.
  • the screw connection portion is screwed and connected to a screw connection portion (described later) of a caulking joint 390 to which the metal reinforced composite pipe 300a is connected.
  • the end portion of the metal reinforced composite pipe 300a is joined to the caulking joint 390.
  • the caulking joint 390 includes a caulking joint portion and a screw connection portion.
  • the crimping joint portion is crimped in a state where the end portion of the metal reinforced composite tube 300a is fitted, thereby joining the metal reinforced composite tube 300.
  • the heat insulating material is coated on the portion where the heat insulating material has been lost,
  • the connecting portion can also be kept warm.
  • the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a are exemplified by the embodiment in which the heat insulating material is coated from the beginning of the connection except for the end portion involved in the joining.
  • the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a are both connected together without any heat insulating material, and after the connection is completed, the entire fiber reinforced composite tube 200a, the entire metal reinforced composite tube 300a, and The connecting portion can be covered with a heat insulating material.
  • either one of the fiber reinforced composite tube 200a and the metal reinforced composite tube 300a (for example, the fiber reinforced composite tube 200a) is connected in a state having no heat insulating material, and after the connection is completed, The entire fiber reinforced composite tube 200a) and the connecting portion can be covered with a heat insulating material.
  • the screw connection part of the electrofusion joint 290 on the fiber reinforced composite pipe 200a side is a female type
  • the screw connection part of the caulking joint 390 on the metal reinforced composite pipe 300a side is a male type.
  • the male and female of each screw connection portion may be reversed.
  • the electrofusion joint 290 is a series type
  • a branch type may be used.
  • the electrofusion joint 290 is a branch type
  • two fiber reinforced composite tubes 200a and one metal reinforced composite tube 300a can be connected.
  • the fiber reinforced composite pipe 200a can be branched by the branch type electrofusion joint 290, and the metal reinforced composite pipe 300a can be directly connected to the branch type electrofusion joint 290.
  • connection between the fiber reinforced composite pipe 200a and the metal reinforced composite pipe 300a may be a connection using a flange and a connection via a steel pipe, in addition to the above-described embodiment.
  • FIG. 4 is a cross-sectional view schematically showing the fiber-reinforced composite pipe 200a in FIG.
  • the fiber reinforced composite pipe 200a (multilayer molded body) shown in FIG. 4 further includes a heat insulating material 280 in the fiber reinforced composite pipe 200 described above.
  • the outer peripheral surface side of the 3rd layer 230 is covered with the heat insulating material 280 like the fiber reinforced composite pipe 200a.
  • the heat insulating material 280 includes the gas barrier layer 250.
  • the heat insulating material 280 may be provided in contact with the outer peripheral surface of the gas barrier layer 250.
  • the heat insulating material 280 is composed of a structure having a large specific surface area.
  • the heat insulating material 280 blocks the heat transfer between the cold / warm water transported in the fiber reinforced composite tube 200a and the external environment of the fiber reinforced composite tube 200a, so that the cold temperature transported in the fiber reinforced composite tube 200a.
  • the fiber-reinforced composite pipe 200a is preferably provided.
  • the thickness of the heat insulating material 280 is not particularly limited, it may be 2% or more and 400% or less, preferably 5% or more and 350% or less, of the outer diameter of the fiber reinforced composite pipe 200 to be kept warm. It is preferable that the thickness is not less than the above lower limit from the viewpoint of maintaining the temperature of cold / hot water and preventing condensation, and being less than the above upper limit is preferable from the viewpoint of construction.
  • FIG. 5 is a cross-sectional view schematically showing the metal-reinforced composite pipe 300a in FIG.
  • a metal reinforced composite tube 300 a shown in FIG. 5 includes a metal reinforced composite tube 300 and a heat insulating material 380.
  • the metal-reinforced composite pipe 300 includes a tubular first layer 310 (inner layer / molded body), a tubular second layer 330 (intermediate layer / metal) disposed outside the first layer 310, and a second layer 330. And a tubular third layer 350 (outer layer / molded body) disposed on the outside.
  • a first adhesive layer 320 is interposed between the first layer 310 and the second layer 330, and a second adhesive layer 340 is interposed between the second layer 330 and the third layer 350, but this is not essential. .
  • the first adhesive layer 320 and the second adhesive layer 340 are provided to improve the adhesion between the first layer 310 and the second layer 330 and between the second layer 330 and the third layer 350, respectively. It has been. Therefore, in the metal reinforced composite pipe 300a, the first layer 310, the first adhesive layer 320, the second layer 330, the second adhesive layer 340, and the third layer 350 are laminated in this order from the axial center side to the outer peripheral
  • the first layer 310 includes a polyolefin resin.
  • the second layer 330 is made of metal.
  • the third layer 350 includes a polyolefin resin.
  • the first layer 310 and the third layer 350 do not include glass fibers as in the fiber reinforced composite tube 200 constituting the fiber reinforced composite tube 200a.
  • the metal-reinforced composite pipe 300 is excellent in bending workability by including the second layer 330 made of metal as an intermediate layer. Bending workability is a property that is easy to bend and that the shape after bending is difficult to return to the original shape.
  • the first layer 310 is the innermost layer of the metal reinforced composite tube 300a and is in contact with cold / hot water transported through the metal reinforced composite tube 300a.
  • the outer peripheral surface of the metal reinforced composite pipe 300 is covered with a heat insulating material 380 like the metal reinforced composite pipe 300a.
  • the heat insulating material 380 is formed of a structure having a large specific surface area.
  • the heat insulating material 380 blocks the heat transfer between the cold / hot water transported in the metal reinforced composite tube 300a and the external environment of the metal reinforced composite tube 300a, thereby cooling the hot and cold transported in the metal reinforced composite tube 300a.
  • the metal-reinforced composite pipe 300 is provided from the viewpoint of maintaining the temperature of water and preventing condensation caused by the heat transfer (which may be a factor that significantly reduces heat retention).
  • the metal reinforced composite tube 300 constituting the metal reinforced composite tube 300a includes other layers.
  • a weather resistant layer may be laminated on the outermost layer
  • a chemical resistant layer may be laminated on the innermost layer.
  • the ratio (r2) of the thickness of the second layer 330 to the thickness of the entire metal reinforced composite tube 300 may be, for example, 0.05 or more and 0.35 or less.
  • the ratio (r2) is preferably 0.1 or more, and preferably 0.2 or less.
  • the ratio (r2) is equal to or higher than the lower limit, the strength (reinforcing property) is further improved.
  • the ratio (r2) is not more than the above upper limit, the bending workability is further improved.
  • the ratio (r1) of the thickness of the first layer 310 to the total thickness of the metal reinforced composite pipe 300 is preferably 0.35 or more, more preferably 0.45 or more, preferably 0.00. 65 or less, more preferably 0.6 or less.
  • the ratio (r1) is not less than the above lower limit, the heat resistance, chemical resistance, corrosion resistance, and bending workability are further enhanced.
  • the ratio (r1) is not more than the above upper limit, the rigidity and strength are further improved.
  • the ratio (r3) of the thickness of the third layer 350 to the thickness of the entire metal reinforced composite pipe 300 is preferably 0.1 or more, more preferably 0.15 or more, preferably 0.00. 3 or less, more preferably 0.25 or less.
  • the ratio (r3) is not less than the above lower limit, the heat resistance, chemical resistance, corrosion resistance, and bending workability are further enhanced.
  • the ratio (r3) is not more than the above upper limit, the rigidity and strength are further improved.
  • the thickness of the metal reinforced composite tube 300 constituting the metal reinforced composite tube 300a is preferably 1 mm or more, more preferably 1.25 mm or more, preferably 6 mm or less, more preferably 3.5 mm or less.
  • the thickness is not less than the above lower limit, the rigidity, strength, and pressure resistance are further enhanced.
  • the thickness is less than or equal to the above upper limit, bending workability and lightness are further enhanced.
  • the thickness of each of the first adhesive layer 320 and the second adhesive layer 340 is preferably 50 ⁇ m or more, more preferably 75 ⁇ m or more, preferably 200 ⁇ m or less, more preferably 155 ⁇ m or less.
  • the thickness control is further facilitated, and the adhesiveness is further enhanced.
  • the thickness of each of the first adhesive layer 320 and the second adhesive layer 340 is equal to or less than the above upper limit, the bending workability is further improved, the amount of material used is reduced, the material cost is low, and the weight is reduced.
  • the thickness of the heat insulating material 380 is not particularly limited, but may be 2% or more and 400% or less, preferably 5% or more and 350% or less, of the outer diameter of the metal-reinforced composite pipe 300 to be kept warm. It is preferable that the thickness is not less than the above lower limit from the viewpoint of maintaining the temperature of cold / hot water and preventing condensation, and being less than the above upper limit is preferable from the viewpoint of construction.
  • the content of the polyolefin resin is preferably 90% by weight or more, more preferably 95% by weight or more, and preferably 100% by weight (total amount) or less.
  • the content of the polyolefin resin is preferably 90% by weight or more, more preferably 95% by weight or more, and preferably 100% by weight (total amount) or less.
  • the polyolefin resin used for the first layer 310 and the third layer 350 is not particularly limited, and a known polyolefin resin can be used. As for polyolefin resin, only 1 type may be used and 2 or more types may be used together.
  • the polyolefin resin used for each of the first layer 310 and the third layer 350 may be the same resin or different resins. For example, a resin that is more excellent in terms of heat resistance, durability, and the like can be selected for the first layer 310.
  • the third layer 350 is not particularly limited as long as it has a minimum resistance against external impact and rubbing and stress applied for a long time at the joint of the joint.
  • the polyolefin-based resin used for each of the first layer 310 and the third layer 350 the first layer 210, the second layer 220, and / or the second layer of the above-described fiber reinforced composite tube 200 constituting the fiber reinforced composite tube 200a.
  • the same resin as the polyolefin resin used for the three layers 230 may be used, or a different resin may be used.
  • polyolefin resins examples include polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, and ethylene- ⁇ -olefin copolymer. From the viewpoint of heat resistance and durability, polyethylene or polypropylene is preferable, and polyethylene is more preferable. Further, the polyolefin resin may be a crosslinked polyolefin resin (particularly, a crosslinked polyethylene PEX).
  • crosslinked polyolefin-based resin examples include peroxide-crosslinked polyolefin-based resins (particularly peroxide-crosslinked polyethylene PEX-A), silane-crosslinked polyolefin-based resins (particularly silane-crosslinked polyethylene PEX-B), and electron beam irradiation crosslinked polyolefin-based resins (electronic Line-crosslinked polyethylene PEX-C).
  • peroxide-crosslinked polyolefin-based resins particularly peroxide-crosslinked polyethylene PEX-A
  • silane-crosslinked polyolefin-based resins particularly silane-crosslinked polyethylene PEX-B
  • electron beam irradiation crosslinked polyolefin-based resins electro beam irradiation crosslinked polyolefin-based resins
  • electro beam irradiation crosslinked polyolefin-based resins electro beam irradiation crosslinked polyolefin-based resins
  • PE polyethylene
  • LDPE low density polyethylene
  • PP polypropylene
  • PP polypropylene
  • PP polybutene-1.
  • the ethylene- ⁇ -olefin copolymer is about several mol% of ⁇ -olefin such as propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene or 1-octene with respect to ethylene. It is particularly preferable that the copolymer be copolymerized at a ratio of
  • a polyolefin resin having a long-term creep property may be selected. As a result, a water leakage accident due to breakage can be prevented.
  • heat-resistant polyethylene (PE-RT) is less durable even when used at a high temperature of 90 ° C. for a long time, and has excellent durability.
  • a polyolefin resin having long-term creep properties conforms to PE100 having a constant stress value of 10.0 MPa or more at which a tube does not break for 50 years at 20 ° C. based on long-term hydraulic strength obtained according to ISO / TR9080. It may be.
  • metal As a metal which comprises a metal layer, what is excellent in intensity
  • Adhesive resin examples of the first adhesive layer 320 and the second adhesive layer 340 include rubber-based hot melt adhesives, modified polyolefins (particularly, modified polyethylene and modified polypropylene), and ionomers.
  • the adhesive resin one of the following exemplifications may be used alone, or two or more may be used in combination.
  • modified polyolefin examples include acid-modified polyolefin and silane-modified polyolefin.
  • modification of the modified polyolefin examples include modification by grafting and copolymerization.
  • the acid-modified polyolefin is obtained by modifying a polyolefin resin with an unsaturated carboxylic acid or a derivative thereof.
  • unsaturated carboxylic acid examples include acrylic acid, methacrylic acid, maleic acid, nadic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, sorbic acid, mesaconic acid, angelic acid, and phthalic acid.
  • Examples of the derivatives include acid anhydrides, esters, amides, imides, metal salts, and the like.
  • maleic anhydride, itaconic anhydride, citraconic anhydride, nadic anhydride, phthalic anhydride, methyl acrylate examples thereof include methyl methacrylate, ethyl acrylate, butyl acrylate, maleic acid monoethyl ester, acrylamide, maleic acid monoamide, maleimide, N-butylmaleimide, sodium acrylate, and sodium methacrylate.
  • unsaturated dicarboxylic acids and derivatives thereof are preferable, and maleic anhydride and phthalic anhydride are particularly preferable.
  • the ionomer is a resin obtained by neutralizing a polyolefin copolymer (comonomer includes unsaturated carboxylic acid and unsaturated carboxylic acid ester) by cross-linking with metal ions between molecular chains.
  • a copolymer may be used individually or in combination of multiple types.
  • the metal ion include transition metal ions such as zinc, manganese, and cobalt; alkali metal ions such as lithium, sodium, and potassium; and alkaline earth metal ions such as calcium. These metal ions may be used alone or in combination of two or more.
  • the metal reinforced composite tube 300 is composed of a first layer 310, a second layer 330, and a third layer 350, silane-modified PE (crosslinked PE) -aluminum-silane-modified PE. (Crosslinked PE).
  • crosslinked PE crosslinked PE
  • the surface of the aluminum is surface-treated so as to be in close contact with the silane-modified PE, whereby both can be brought into close contact by the anchor effect.
  • PE-RT heat resistant PE
  • Acid-modified PE (adhesive layer) -Aluminum-maleic acid-modified PE (adhesive layer) -High-density PE, silane-modified PE (crosslinked PE) -Maleic acid-modified PE (adhesive layer) -Aluminum-maleic acid-modified PE (adhesive layer) -Silane modified PE (crosslinked PE).
  • Examples of the structure having a large specific surface area constituting the heat insulating material 380 include a porous material (for example, a resin foam) and a fibrous material (for example, a nonwoven fabric, a woven fabric, a single fiber body, and a net-like body).
  • a porous material for example, a resin foam
  • a fibrous material for example, a nonwoven fabric, a woven fabric, a single fiber body, and a net-like body.
  • the foamed resin may be a polyolefin resin foam described above as the resin used for the first layer 310 and the third layer 350 from the viewpoints of heat insulation, flexibility, dimensional stability, ease of attachment, and the like. From the viewpoint of more effectively obtaining heat insulation, flexibility, dimensional stability, ease of attachment, and the like, a crosslinked product of the above-described polyolefin-based resin (cross-linked polyolefin-based resin) used as the resin used for the first layer 310 and the third layer 350 Resin).
  • the fibrous material may be an inorganic fiber such as glass fiber or carbon fiber, or an organic fiber such as natural fiber or resin fiber.
  • the first layer 310, the third layer 350, the first adhesive layer 320, and the second adhesive layer 340 may each include a thermoplastic resin other than the polyolefin-based resin within a range that maintains desired characteristics.
  • the content of the thermoplastic resin other than the polyolefin resin in the polyolefin resin composition is more than the content of the polyolefin resin in the polyolefin resin composition.
  • a small amount that is, less than 50% of the entire resin component is preferable.
  • thermoplastic resins other than polyolefin resins examples include thermoplastic resins other than polyolefin resins, antioxidants, cross-linking agents, lubricants, which are listed as other components in the fiber reinforced composite tube 200 constituting the fiber reinforced composite tube 200a.
  • examples include the same components as the light stabilizer and the pigment.
  • the creep strength of the metal reinforced composite tube 300 may be 1.5 times or more and 3 times or less that of the fiber reinforced composite tube 200.
  • the diameter of the inner diameter of the metal reinforced composite pipe 300 may be, for example, 75 mm or less, preferably 50 m or less, from the viewpoint of saving piping space.
  • the outer diameter of the metal-reinforced composite pipe 300 is, for example, 35 mm or less, preferably 34 mm. Hereinafter, it may be 28 mm or less.
  • the lower limit value in the range of the aperture is not particularly limited, but may be, for example, 10 mm from the viewpoint of securing the flow rate.
  • Example 1 Polyolefin-based polyethylene (polyethylene resin, PE100, density: 0.95 g / cm 3 ) 50 parts by weight, glass fiber (fiber length 3 mm, fiber diameter 13 ⁇ m, aminosilane surface treatment) 40 parts by weight, and a compatibilizing agent 10 parts by weight of a certain silane-modified polyethylene (density: 0.95 g / cm 3 ) was mixed to obtain a polyolefin resin composition for forming the second layer. Moreover, in order to form a 1st layer and a 3rd layer, polyethylene (PE100, density: 0.95 g / cm ⁇ 3 >) which is polyolefin resin was prepared.
  • each of the first layer, the second layer, and the third layer was formed using separate single extruders.
  • the first layer and the third layer were 40 mm, and the second layer was a single extruder of 75 mm.
  • the extrusion temperature was 200 ° C.
  • a dedicated three-layer mold was used as the mold.
  • a 50A three-layer tube having an outer diameter of 60 mm and an overall thickness of 5.5 mm was obtained.
  • Examples 2 to 13, 17 to 20 and Comparative Examples 1 to 9 A fiber-reinforced composite tube was obtained in the same manner as in Example 1 except that the thickness and composition of the first layer, the second layer, and the third layer were set as shown in Tables 1 to 3 below.
  • Example 14 to 16, 21 The thickness and composition of the first layer, the second layer, and the third layer were set as shown in Tables 2 and 3 below to form a three-layer tube, and maleic anhydride-modified polyethylene (density) on the outside of the third layer : 0.93 g / cm 3 ) and a gas barrier layer was formed outside the adhesive layer using ethylene vinyl alcohol (density: 1.19 g / cm 3 ). In the same manner as in Example 1, a fiber-reinforced composite tube was obtained.
  • an adhesive layer and a gas barrier layer were formed on the outside of the third layer in the three-layer tube using two single extruders.
  • the extrusion temperature was 200 ° C.
  • ⁇ Thermal expansion coefficient is 4 ⁇ 10 ⁇ 5 / ° C. or less
  • ⁇ Thermal expansion coefficient exceeds 4 ⁇ 10 ⁇ 5 / ° C. and 5 ⁇ 10 ⁇ 5 / ° C. or less
  • ⁇ Thermal expansion coefficient exceeds 5 ⁇ 10 ⁇ 5 / ° C. and less than 5.5 ⁇ 10 ⁇ 5 / ° C.
  • Thermal expansion coefficient is 5.5 ⁇ 10 ⁇ 5 / ° C. or more
  • Hot internal pressure creep performance 1000 hours
  • the hot internal pressure creep performance at 80 ° C. of the obtained fiber reinforced composite tube was tested at 80 ° C. using a hot internal pressure creep tester.
  • the circumferential stress with a fracture time of 1000 hours was evaluated.
  • the hot internal pressure creep performance at 80 ° C. is 1000 hours or more with a circumferential stress of 5.0 MPa.
  • the hot internal pressure creep performance was judged according to the following criteria.
  • Circumferential stress is 5.5 MPa or more
  • Circumferential stress is 5.24 MPa or more and less than 5.5 MPa
  • Circumferential stress is 5 MPa or more and less than 5.24 MPa
  • Circumferential stress is less than 5 MPa or measurement is not possible
  • Oxygen permeability was evaluated according to DIN 4726. Oxygen permeability was determined according to the following criteria.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne : une conduite composite renforcée par des fibres sous la forme d'un matériau de conduite multi-couche présentant une résistance élevée, une stabilité dimensionnelle élevée, et une excellente aptitude au façonnage; et un système de conduite d'eau chaude/froide présentant une excellente stabilité dimensionnelle et une aptitude au façonnage améliorée. Cette conduite composite renforcée par des fibres comprend : une première couche en forme de conduite comprenant une résine à base de polyoléfine; une deuxième couche en forme de conduite comprenant une résine à base de polyoléfine, des fibres de verre, et un agent de compatibilité; et une troisième couche en forme de conduite comprenant une résine à base de polyoléfine; la deuxième couche étant disposée sur le côté extérieur de la première couche, la troisième couche étant disposée sur le côté extérieur de la deuxième couche, le rapport de l'épaisseur de la deuxième couche par rapport à l'épaisseur combinée totale de la première couche, la deuxième couche, et la troisième couche étant de 0,3 ou plus et de 0,8 ou moins, et, dans 100 % en poids de la deuxième couche, la teneur en résine à base de polyoléfine étant de 45 % en poids ou plus et de 84 % en poids ou moins, la teneur en fibre de verre étant de 15 % en poids ou plus et de 45 % en poids ou moins, et la teneur en agent de compatibilité étant de 0,5 % en poids ou plus et de 10 % en poids ou moins.
PCT/JP2016/054738 2015-02-20 2016-02-18 Conduite composite renforcée par des fibres et système de conduite d'eau froide/chaude WO2016133167A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201680010751.9A CN107250640B (zh) 2015-02-20 2016-02-18 纤维强化复合管和冷热水配管系统
AU2016220736A AU2016220736B2 (en) 2015-02-20 2016-02-18 Fiber-reinforced composite pipe and cold/warm water piping system
SG11201706694TA SG11201706694TA (en) 2015-02-20 2016-02-18 Fiber-reinforced composite pipe and cold/warm water piping system
US15/552,252 US10544886B2 (en) 2015-02-20 2016-02-18 Fiber-reinforced composite pipe and cold/warm water piping system
KR1020177022898A KR101993147B1 (ko) 2015-02-20 2016-02-18 섬유 강화 복합관 및 냉온수 배관 시스템

Applications Claiming Priority (6)

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JP2015032018 2015-02-20
JP2015-032018 2015-02-20
JP2015101914A JP6510885B2 (ja) 2015-02-20 2015-05-19 多層管材
JP2015-101655 2015-05-19
JP2015-101914 2015-05-19
JP2015101655A JP6484106B2 (ja) 2015-05-19 2015-05-19 冷温水管路配管システム

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111070621A (zh) * 2019-12-13 2020-04-28 浙江沃坦科水暖设备有限公司 无机纳米抗菌极细pert管的制备方法

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Publication number Priority date Publication date Assignee Title
JPS6132743A (ja) * 1984-07-26 1986-02-15 昭和電工株式会社 多層構造管
JPH07253187A (ja) * 1994-03-15 1995-10-03 Sekisui Chem Co Ltd 管継手
JPH10272738A (ja) * 1997-03-31 1998-10-13 Kuraray Co Ltd パイプ
JP2001355767A (ja) * 2000-04-13 2001-12-26 Gerhard Rosenberg 液体状、ペースト状、および／または気体状の媒体用の配管を敷設するために押出成形、射出成形、または吹込成形されたプラスチック製のパイプ、取付部品、または成形品

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Publication number Priority date Publication date Assignee Title
JPS6132743A (ja) * 1984-07-26 1986-02-15 昭和電工株式会社 多層構造管
JPH07253187A (ja) * 1994-03-15 1995-10-03 Sekisui Chem Co Ltd 管継手
JPH10272738A (ja) * 1997-03-31 1998-10-13 Kuraray Co Ltd パイプ
JP2001355767A (ja) * 2000-04-13 2001-12-26 Gerhard Rosenberg 液体状、ペースト状、および／または気体状の媒体用の配管を敷設するために押出成形、射出成形、または吹込成形されたプラスチック製のパイプ、取付部品、または成形品

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111070621A (zh) * 2019-12-13 2020-04-28 浙江沃坦科水暖设备有限公司 无机纳米抗菌极细pert管的制备方法

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