CN101038050A - Pipeline of composing metal with polythene - Google Patents
Pipeline of composing metal with polythene Download PDFInfo
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- CN101038050A CN101038050A CN 200610020474 CN200610020474A CN101038050A CN 101038050 A CN101038050 A CN 101038050A CN 200610020474 CN200610020474 CN 200610020474 CN 200610020474 A CN200610020474 A CN 200610020474A CN 101038050 A CN101038050 A CN 101038050A
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- 239000002184 metal Substances 0.000 title claims abstract description 104
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- 239000004698 Polyethylene Substances 0.000 claims abstract description 105
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- 150000001875 compounds Chemical class 0.000 claims description 85
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 29
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- 238000005260 corrosion Methods 0.000 claims description 7
- 229920001684 low density polyethylene Polymers 0.000 claims description 7
- 239000004702 low-density polyethylene Substances 0.000 claims description 7
- 150000002978 peroxides Chemical class 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 150000008064 anhydrides Chemical group 0.000 claims description 3
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- 229920000098 polyolefin Polymers 0.000 abstract 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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- 238000011161 development Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
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- 238000000227 grinding Methods 0.000 description 2
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MSAVICZWFPQFPO-UHFFFAOYSA-N acetic acid;ethene Chemical group C=C.C=C.CC(O)=O MSAVICZWFPQFPO-UHFFFAOYSA-N 0.000 description 1
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- 239000011247 coating layer Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
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- 235000020188 drinking water Nutrition 0.000 description 1
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Images
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- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention provides a metallic polyethylene combined canal, the canal wall of which is provided with tubular metal frame having apertures as reinforcement bodies, the grafting modified polyolefin polymer continuum with polar group is firmly glued and coated on the frame surfaces through apertures on the tubular metallic frame on inner-outer surfaces of the frame, grafting ratio of the grafting modified polyolefin is 0.12 percent to 1.5 percent. The invention solves technical problem of hard firm integral gluing of metallic and polyethylene combination interface.
Description
Technical field:
The present invention relates to the graft modification of polythene material, it is modified as polar polymer by non-polar polymer, relate to the compound pipe production technology of metal and polyethylene, particularly pertusate as metal cylindrical skeleton that strengthens body and compound pipeline and the pipe fitting of polythene material that polarity is arranged.
Technical background:
The compound pipeline of metal and polymer comprises tubing and existing many technology and the patent reports of pipe fitting, also has a large amount of products and engineering to use in practical engineering application, and this multiple tube has become important industry at continuous development and progress.
Metallic conduit has higher intensity and the lower hot line coefficient that expands, but it is not corrosion-resistant, not only can not carry corrosive fluid, even carry not corrupt liquid, etc. at least also will do the preservative treatment of surperficial anti-electrocorrosion during application with burying.
Polymer pipe has Corrosion Protection preferably, also convenient the connection, carry at potable water and corrosive fluid, the chemical engineering application facet, extraordinary usability is arranged, but have relatively high expectations, the bearing capacity reduction greatly of simple polymerisation pipe when the conveyance fluid temperature is higher than 50 ℃～80 ℃ at discharge pressure, particularly the bloated coefficient of hot line is more than ten times of metal tube, and the application of simple polymerisation pipe is restricted.
Because above-mentioned two kinds of pipes respectively have excellent performance, but each has unsurmountable problem to exist again, so the compound pipeline of metal and polymer is as a kind of advantages, and the pipeline that shortcoming overcomes has had significant progress.This composite pipe many with metal tube or skeleton as strengthening body, according to requirement of engineering wall and/or outer wall composite polymeric materials within it.Because inside and outside wall composition polymer at pipe, this polymer is mainly born anti-corrosion function, so the connection between tube and tube, the tube and tube spare also mainly relies on being welded to connect or being threaded between metal tube and the skeleton, can't stand the system pressure requirement with docking also to hold by the melting welding between the polymer.Particularly diameter is at the pipeline of φ more than 630, being welded to connect between the basic dependence metal tube, even the pipe of φ below 630 welded, but inwall is because soldered can't enter personnel, composition polymer butt joint place is anticorrosion once more, and metal tube and polymer pipe are encountered difficulties in the engineering application less than the composite pipe of φ below 630.If because to metal tube and skeleton butt welding or be threaded, the local inwall of the ruinate polymer composite layer in joint can't be repaired.Therefore under this background, as strengthening body multiple tube of composition polymer on skeleton sufficient development has been arranged with pertusate metal frame.This pipe intensity mainly strengthens skeleton by metal and bears, the polymer continuum is mainly born anticorrosion and tube and tube, fusion between the tube and tube spare connects, but polymer and metal tube, compound many important techniques difficulties and the problem of also existing between the metal cylindrical skeleton.General antiseptic property is good, chemical resistance is good, carry the standard compliant polymer of potable water all to belong to non-polar polymer such as polyethylene (PE) and polypropylene (PP), but interface compound with it or surface are the metal surfaces, as the aluminium sheet band, the steel plate band, these surfaces are typical polar surfaces, can not bond and affinity between the two at all, though the polymer continuum coats its surface and is compound, separate but the interface is actual, people are when producing and using this multiple tube for this reason, the bonding at the two interface, affinity is realized having adopted a lot of ways on truly compound.Because do not solve the affinity at the two interface, can not make the two interface really bonding, firmly compound is one, in fact the common composite material of bringing into play of our inreal the two excellent properties of acquisition.
The steel metal surface of known and disclosed non-polar polymer (as PE or PP) and polarity and the secure bond on aluminum metal surface, be combined with each other, up to the present also mainly be to rely between the two interface, increase one deck adhesive layer or apply the transition layer that one deck can make the two affinity and firmly be combined with each other.Concrete technological scheme has many kinds.A kind of be between the interface, use polar group arranged but the Bond that can merge and be bonded as one with non-polar polymer, ethene-ethyl acrylate copolymer, ethene-acrylic copolymer such as commercially available binary copolymerization, with ethene-vinyl acetate-ethenol copolymer of ternary polymerization or the like, another kind is to apply one deck transition layer in advance in the metal surface such as epoxy resin, compound again one deck ethene-acetate ethylene copolymer on it, compound with nonpolar polymer again.
The transition layer of these adhesive layers or coating can both be better with polarity metal surface and firm being combined with each other of nonpolar polymer.But owing to need the special coating equipment of extruding to apply this layer binder layer, on the production line of composite pipe, need at least two of many increases to extrude the equipment of coating at metal tube or skeleton inner and outer surface respectively, investment is increased, cost of production increases, technology is wayward, special in the less production line of diameter such as φ 200 pipes, be difficult.In order to make Bond can effectively be coated in the metal frame surface, and abundant moistening metal polar surfaces, the processing fusing point of general these Bonds is all lower, melt index is higher, though on the interface, can be easy to the two interface bonding compound, but when composite pipe during in higher serviceability temperature, this layer binder layer can produce on the interface again because of the low not enough slippage of temperature resistant capability of fusing point, destroyed to combine and born pressure-bearing and excellent function anticorrosion and that be connected as the two, make the nonpolar compound polymeric layer and the compound also corresponding generation slippage of metal surface, reduced the heatproof engineering application of temperature of composite pipe, reality has reduced the engineering property of pipe.This in addition adhesive layer complex technique is in the application on pertusate metal frame surface, can make by hole and coat of not heatproof fusion and the slippage of the polymer continuum of skeleton because of adhesive layer, reduce the heatproof engineering property of composite pipe greatly, when serious even can make of hole the internal and external layer of skeleton between the slippage of non-polar polymer continuum by skeleton, destroyed to combine and born pressure and anticorrosion and link firm excellent properties, and reduced the bearing capacity of this composite pipe delivering hot water's medium and aggressive medium greatly as the two.Therefore promptly to strengthen the body skeleton and produce the pipeline compound with polymer by pertusate metal, so that solve the composite pipe of the aforesaid φ of convenience 630 following calibers, utilize the polymer continuum to realize tube and tube, fusion between the tube and tube spare connects, utilize simultaneously the hole of skeleton that the bloated expansion of hot line that the continuum that coats is higher than ten times of metallic material is pinned again, make continuum and composite pipe have class formula metal and and the line of metal frame expand rate and give full play to the excellent properties of the compound composite pipe of pertusate metal frame and polymer, make polymer continuum and metal polar surfaces secure bond and compound again, prevent that the two interface and section from having infirm compound the infiltrate through combination interface of flowing medium because of the interface, pipeline corrosion protection and leakproof linkage function were lost efficacy, better for using at the two interface, cost is lower, compound more reliable, produce more convenient, the interface secure bond that can give full play to again for the composite pipe function and compound new technological scheme, the emphasis that has become industry to pursue.The author had once applied for many patents and had made many conceptual designs for this reason, but all fail to jump out aforesaid those several basic schemes, more there is not scheme, the market industry does not have scheme to relate to utilize the polymer continuum can adopt the modify and graft polar group to make non-polar polymer directly have polarity yet and can directly coat metal frame with the secure bond combined polarity, the technological scheme of pertusate metal frame particularly, so, even the two interface secure bond and compound be one, pertusate metal frame and polymer continuum are connected as a single entity by hole, prevent that promptly the polymer continuum from producing the bloated or thermal expansion of the line that is higher than ten times of metal frames of polymer, can be one because of it is firmly compound again, can couple together by pipe or the hot melt of pipe fitting outer wall or the molten internal and external layer polymer melting of electric heating and be pipe network its skeleton hole, realize that reliable pipe network fusion connects, solve the compound pipeline of metal and polymer and can not give full play to its excellent properties, can not conveniently connect, the two interface be difficult for secure bond compound for one or compound for one must relate to adhesive layer or the coating transition layer investment big, the technical barrier that cost is high.
The application number 200510020523 of the applicant's application, in in September, 2005 disclosed steel-plastic composite pipe production method and device the polymer continuum that adopts maleic anhydride or acrylic ester grafted polymer to make the clad metal skeleton was once disclosed in specification, and the weight ratio and the polyethylene or the polypropylene blending modified technological scheme that is used as continuum that do not have grafting that adopt the above-mentioned graft polymer 15～30% of more economical usefulness, but in the industry the professional person only all know with the blend ratio realize firm bonding and compound be disclose inadequate, because of different polymer materials and the percent grafting of the unsaturated carboxylic acid of different polar functionalities are big differences very, can produce percent grafting in 0.3～6% scope, to realize real secure bond and compound with the polar surfaces of metal such as steel and aluminium, have under certain treatment conditions on the surface, the percent grafting of above-mentioned polymer and unsaturated carboxylic acid will reach the percent grafting more than 0.12% at least, if simply with 15～30% weight blend recently, technological scheme does not realize purpose.All to be the author sum up out by a large amount of prescriptions and production and adhesion test for this, could set up feasible because of having only by a large amount of tests, but with original openly scheme than the new trickle technological scheme that the explicit costs ability to bear is arranged, the author has done clearer and more definite on disclosed scheme and improvement project more accurately for this reason.
Summary of the invention:
The objective of the invention is in order to overcome above deficiency, provide a kind of metal and compound the two interface of polyethylene of solving to be difficult for that secure bond is compound to be the technical barrier of one, can reliable, convenient metal and the compound pipeline of polyethylene that connects.
The solution of the present invention is achieved like this:
The pipeline that metal of the present invention and polyethylene are compound, comprise tubing and pipe fitting, there is conduct to strengthen the tubular metal frame of body in the tube wall of multiple tube with hole, the polyethylene continuum with polar group of process graft modification is by inside and outside surperficial secure bond and the coating with skeleton of the hole on the cylindrical skeleton at skeleton, the polyethylene continuum that polar group is arranged is the polyethylene with carboxyl or hydroxyl or carbonyl or anhydride group polar group, and its infrared spectrogram has the characteristic absorption peak of typical above-mentioned polar group.There are not binder material layer or coating layer at cylindrical skeleton and polyethylene continuum compound interface, only depend on above-mentioned polyethylene continuum can be with skeleton surface secure bond compound and bear 20 ℃ of water temperatures, 0.6Mpa hydraulic pressure with upward pressure, impermeable pressurized tests of going into the compound interface (section) of continuum and skeleton, the polycthylene grafted rate of graft modification is 0.12%～1.5%.
The pipeline that above-mentioned metal and polyethylene are compound, polyethylene continuum are to be polyethylene continuum with polar group through extruder extruding graft reaction modifying by at least a in maleic anhydride (MAH) and high density polyethylene (HDPE) (HDPE), the low density polyethylene (LDPE) under the peroxide grafted action of evocating.
The pipeline that above-mentioned metal and polyethylene are compound, polyethylene continuum are that process extruder extruding graft reaction modifying under the effect of peroxide grafted initator is the polyethylene continuum with polar group by maleic anhydride (MAH) and non-crosslinked heatproof polyethylene (PE-RT).With maleic anhydride (MAH) and PE-RT grafting, can obtain the good polyethylene that polarity is arranged of heat resistance, on hot water pipe net, use, compound interface is being higher than 80 ℃, pressure uses greater than 0.8Mpa special impermeable ability.Because PE-RT has the excellent heat resistance energy, be only second to crosslinked polyethylene in polyethylene product kind, but it has processibility easily and needn't must be through the trouble operation of hydrolytie polycondensation cross-linking reaction as organosilane crosslinked polyethylene, the performance that makes things convenient for melting to connect is arranged again than peroxide crosslinked polyethylene, percent grafting can reach after the 0.5% above grafting not only, and heat resistance does not descend, owing to metal frame better bonding is arranged after being modified as polarity, more can bear the heatproof long-time running of hot water pipe net with strengthening body, and the reduction of bearing capacity has promptly improved bearing capacity than the not composite pipe minimizing 5% of modified PE-RT.
The pipeline that above-mentioned metal and polyethylene are compound, polyethylene continuum are to be polyethylene continuum with polar group through extruder extruding graft reaction modifying by at least a in a kind of and high density polyethylene (HDPE) (HDPE) in methyl methacrylate (MMA), acrylic acid (AA), hydroxyethyl methacrylate (HEMA), the GMA (GMA), the low density polyethylene (LDPE) under the peroxide grafted action of evocating.With maleic anhydride (MAH) or other above-mentioned unsaturated carboxylic acid graft and modification, make polyethylene become the continuum of polar group, have ripe disclosed prescription and technology, grafted material also has the commercial goods to supply.
The pipeline that above-mentioned metal and polyethylene are compound, polyethylene continuum are by maleic anhydride (MAH) and polythene material, and adopting solid state mechanochemistry grafting method to utilize the graft modification of millstones shape chemical reactor is the polyethylene continuum with polar group.Adopt the method grafting that maleic anhydride (MAH) is not only arranged, other unsaturated carboxylic acid also can, the existing open source literature report of the method can be saved initator, technology maturation can improve the sanitation performance index.
The pipeline that above-mentioned metal and polyethylene are compound, the polyethylene continuum is by the polyethylene with polar group of graft modification or has the binder polymer of polar group and do not have nonpolar high density polyethylene (HDPE) (HDPE) blend of modification to make that its blend continuum percent grafting is at least greater than 0.12%.Graft modification has the polyethylene of polar group, and binder polymer with polar group, its percent grafting is generally 0.5%～1.5%, if hole steel band metal frame surface is arranged handles through cleaning and texturing, the percent grafting of general carboxyl or hydroxyl or carbonyl or anhydride group polar group reaches 0.12% above continuum just can the firm and compound good skeleton surface of effective adhesive, therefore polyethylene or the binder polymer and the nonpolar poly mixed proportion of polarity are arranged, can in certain proportion, adjust according to the adhesive property on metal frame surface fully.If have polar polyethylene or binder polymer percent grafting to reach 0.72%, the nonpolar polyethylene of mixed proportion can be 75～80%, it is greater than 20～25% that polar polyethylene is arranged, just can bond through the tubular metal frame of cleaning and coat firmly, and can bear 20 ℃ of water temperatures of compound interface (section), the pressure-bearing impermeable, that tear, tear compound interface of 0.6Mpa hydraulic pressure is tested.Compare with a scheme of disclosed additional proportion 15～30% weight ratios in the application number 200510020523, former scheme discloses insufficient, the ratio that adds because of polar polymer and the percent grafting of its polar group have the most direct relation, if percent grafting is lower than 0.4%, even the blend ratio reaches 30%, the percent grafting of polar group that can not make the material after the blend is greater than 0.12%, actual be can not with metal polar surfaces secure bond and compound and bear of the test of the water of certain pressure to the pressure permeation at interface.This scheme can be saved costs than whole use grafted materials, makes this kind coat pipeline that skeleton forms tube wall by polar polyethylene and has the market competition ability and widely applied.
The pipeline that above-mentioned metal and polyethylene are compound, the tubular metal frame that has the conduct enhancing body of hole in the tube wall of multiple tube are that the steel wire of at least one left hand screw and the steel wire intersection of at least one right-hand screw are entwined.
The tubular metal frame that the pipeline that above-mentioned metal and polyethylene are compound, the conduct with hole in the tube wall of multiple tube strengthen body is that pertusate steel band or steel plate or aluminium strip form through longitudinal curl or screw winding.
The tubular metal frame that the pipeline that above-mentioned metal and polyethylene are compound, the conduct with hole in the tube wall of multiple tube strengthen body is pertusate steel band or aluminium strip or steel plate through longitudinal curl or screw winding through being welded.
The tubular metal frame that the pipeline that above-mentioned metal and polyethylene are compound, the conduct with hole in the tube wall of multiple tube strengthen body is that the broadwise steel wire twines warp-wise steel wire point of intersection through being welded.
The pipeline that above-mentioned metal and polyethylene are compound, the tubular metal frame that the conduct with hole in the tube wall of multiple tube strengthens body is to be entwined through spiral by the steel wire of at least one left hand screw or the steel wire of at least one right-hand screw.
There are the electrodeposited coating of burning of preventing and erosion or the anti-corrosion of metal layer that plates with physical vacuum film plating process (PVD) in the surface that the pipeline that above-mentioned metal and polyethylene are compound, the conduct with hole in the tube wall of multiple tube strengthen the tubular Steel Skeleton of body.
For the antiseptic power that makes pipeline improves, the life-span is longer, to the copper coating or the zinc-plated or chromium plating of metal frame, so that skeleton strengthens the long-term maintenance of function.
The pipeline that above-mentioned metal and polyethylene are compound, tube wall skin that forms at the compound tubular Steel Skeleton of the polyethylene continuum secure bond that polar group is arranged in the tube wall of multiple tube and/or internal layer are the also compound nonpolar polyethylene layer of one deck.Extrude the nonpolar polyethylene layer of compound one deck again on the poly continuum skin that polarity is arranged and/or the internal layer surface of playing secure bond and complex metal frame, can reduce the poly consumption that polarity is arranged and save cost, particularly the thicker product of tube wall has the effect that very significantly reduces cost and improve performance.The residue of its graft reaction can be carried out better intercepting and shielding, further improve its sanitation performance and increase switching performance.
The pipeline that above-mentioned metal and polyethylene are compound, pipe fitting are the pipe fittings that two logical or threeways or four-way or 90 ° of elbows or 45 ° of elbows and reducing have CONCENTRIC REDUCER.
The pipeline that metal of the present invention and polyethylene are compound, both can make tubing, also can make pipe fitting, adopt of surperficial secure bond and the coating of the polyethylene continuum with carboxyl or hydroxyl or carbonyl polar group of process graft modification with skeleton, solve the compound pipeline of metal and polymer and can not give full play to its excellent properties, can not conveniently connect, the two interface be difficult for secure bond compound for one or compound for one must relate to adhesive layer or the coating transition layer investment big, the technical barrier that cost is high, the pipe network more reliable performance.
Description of drawings:
Fig. 1 is the pipeline connection diagram of the present invention that the three-way pipeline link is arranged.
Fig. 2 has the pipeline of the present invention of three-way pipeline link to connect another schematic representation.
Fig. 3 is the infrared spectrogram of the polymer (HDPE-g-MAH) of high density polyethylene (HDPE) (HDPE) and maleic anhydride (MAH) graft reaction.
Embodiment:
Embodiment 1:
Fig. 1 has provided the embodiment of the invention 1 figure.There is pertusate steel plate to roll the cylindrical skeleton 2 of welding in the tee pipe fitting 1, has the polyethylene continuum 3 of polar group to pass the inside and outside surface bonding of hole on the cylindrical skeleton 2 and cylindrical skeleton and coat and form tube wall.Pertusate steel sheet metal cylindrical skeleton 5 is arranged in the tubing 4, have the polyethylene continuum 6 of polar group to pass cylindrical skeleton 5 surface adhesion inside and outside and it is coated the formation tube wall with it.Have in the tubing 7 by broadwise steel wire 8 around steel radial 9 and the tubular metal frame 10 that forms through welding, have the polyethylene continuum 11 of polar group pass tubular metal frame 10 with it inside and outside surperficial strong bond and it is coated form tube wall.Tubing 4,7 lays respectively at and connects as one with it in the two ends of pipe fitting and the joint socket that an end stretches into pipe fitting respectively and form φ 160mm pipe network, to this pipe network with 60 ℃, 2.0Mpa pressure pressure testing, the termination of tubing 4 and pipe fitting 1 all cuts off bare metal skeleton and the compound interface (section) of continuum, impermeable through 165h continuous pressure testing, do not reduce pressure, this composite pipe not only anti-corrosion capacity is strong, the bearing capacity height, and also whole indexs reach the drinking-water pipe sanitary standard.
The polyethylene that polar group is arranged is by following prescription, adopting the polycthylene grafted rate of extruder extruding pelletization is 0.5%-0.8%, prescription is known open source literature, by mass parts heavily, 100 parts of high density polyethylene (HDPE)s (HDPE), maleic anhydride (MAH) 2-5 part, 0.1～0.4 part of peroxide grafted initator (DCP), see the general figure of Fig. 3 infrared light, find out from the infrared light of the polymer (HDPE-g-MAH) of high density polyethylene (HDPE) (HDPE) or maleic anhydride (MAH) graft reaction is general, at 1791.8cm
-1All there is tangible carbonyl absorption peak at the place, shows that HDPE is grafted with the carbonyl polar group.
The non-crosslinked heatproof polyethylene that polar group is arranged, adopting the extruder extruding pelletization to obtain percent grafting by following prescription is 0.4%～0.7% polyethylene, this polyethylene can be produced the hot water pipe net composite pipe, at 80 ℃, long-time running under the 0.6Mpa condition.Prescription is: Korea S SK company produces non-crosslinked heat-proof polythene (PE-RT) DX800,100 parts.Maleic anhydride (MAH) 2-4 part, grafting initator (DCP) 0.2-0.3 part.
The polycthylene grafted rate that polar group is arranged is the composite pipe of 0.5%～0.9% manufacture of materials, suits be not higher than 60 ℃, and 1Mpa pressure is operation down.20 parts of 80 parts of HDPE, LDPE, 5 parts of methyl methacrylates, 0.2～0.5 part of grafting initator (DCP).
0 part of 100 parts of also available HDPE, maleic anhydride (MAH) 2-4 part, grafting initator (DCP).Adopt solid state mechanochemistry grafting method to utilize horizontal pan type physico chemical reactor, this core texture is inserted flour milling, the inner ring water cooling temperature that contracts that adopts of flour milling is controlled at 12～25 ℃, pressure is controlled at 17-19KN by the screw press system, speed of grinding plate is controlled at 20-40 to be changeed/10 fens, grinding times 16 times, can produce the polyethylene that polar group is arranged that percent grafting reaches 0.5-0.8%, this method is relatively poor with reaction extrusion molding specific efficiency, but formulation cost is lower, and the polyethylene continuum does not have the residual peculiar smell of DCP.
The material of the polar polyethylene (percent grafting is 0.6%～0.8%) of maleic anhydride (MAH) graft modification is got 30 parts, do not get 70 parts with having the nonpolar polyethylene HDPE material of modification, blend is through extruding the production composite pipe, the actual percent grafting of this pipe continuum is 0.18%～0.24%, but the cylindrical skeleton that pertusate roll of steel plate boxing is connect firmly coats and bonding, continuum can not be separated with the metal surface and peel off, compound interface (section) can bear 20 ℃ of water temperatures, 2.0Mpa 165 hours pressure testing of hydraulic pressure, the normal operation that can bear the long-term pipe network of 1.6Mpa.
The metal cylindrical skeleton is that porosity ratio accounts for 12%～25%, the steel plate band of aperture φ 3mm～φ 6mm, thickness 1～3mm is welded behind longitudinal curl or helix-coil, through cross cross-head ecto-entad, simultaneously the skeleton internal and external layer form the continuum that coats with the metal frame secure bond and compound be one, through cooling formation composite pipe.This composite pipe and pure plastic pipe relatively have the bloated rate of the line of approximate metal tube, and the line between 20 ℃ to 100 ℃ expands rate in 0.4%, and this is the required excellent properties of engineering.
The metal cylindrical skeleton is that porosity ratio accounts for 8～15%, aperture φ 3～φ 5, thickness is the aluminium strip of 0.2～0.4mm, vertical coiling of warp or screw winding are in advance with there being the polar polyethylene material to extrude the core pipe of φ 63 diameters of cooling forming, extruding the polythene material that is compounded with polarity again at the aluminium strip outer surface of reeling coats aluminium strip, the heat that utilizes this molten mass is with core pipe and aluminium strip bonding, and by the hole on the aluminium strip core pipe and outer fusion continuum being connected and coat the formation tube wall simultaneously becomes multiple tube.
Embodiment 2:
Fig. 2 has provided the invention process illustration.Present embodiment 2 is basic same with embodiment 1.Do not exist together is that metal frame 3 in the pipe fitting 4 is the cylindrical skeletons 12 that twined steel radial by the broadwise steel wire.This composite pipe and pure plastic pipe relatively have the bloated rate of the line of approximate metal tube, and this is the required excellent properties of engineering.
Use the core pipe of polyethylene production φ 200 diameters that polar group is arranged in advance, left-handed and dextrorotation intersect and twine the poly wire-shaped that has been coated with polar group and become the intersection grid on the core pipe, to being wound with the core pipe heating of steel wire, the polyethylene that utilizes the cross extruder head to extrude polarity simultaneously coats steel wire, simultaneously hole has been crowded with polar polyethylenes, make its secure bond and coat the intersection steel wire, hole and the fusion of internal layer core pipe by grid simultaneously is connected to form multiple tube.
Availablely be same as above-mentioned method, just the steel wire that twines of spiral is not left-handed and dextrorotation intersects yet, and just only left-handed or only be that right hand helix twines on the core pipe, the suitable diameter of this method is less than the production of the composite pipe of φ 160.
Also can outside the metal cylindrical skeleton, adopt the cross extruder head to extrude the polyethylene continuum of polar group, this continuum enters inboard wall of skeleton by hole, inside and outside skeleton, form bonding and the coating of continuum to skeleton, the present embodiment difference, be skeleton to be coated the tube wall that forms composite pipe as the polyethylene continuum of polar group, on this tube wall according to the needs of the composite pipe compound more nonpolar polyethylene of one deck of extruding on layer and/or the skin within it, even can extrude if can and the polymer material of the polyethylene bond vitrified of polar group and compound other, enlarged compound description of materials, also promptly enlarged being connected and networking of pipeline of this kind pipeline and different performance, can realize and being connected of the material of different performance, enlarge the adaptability of pipe network function and performance.
The compound one deck of extruding can bond vitrified with the polyethylene that polar group is arranged and the polymer material of compound other on internal layer on the tube wall and/or skin, comprise nonpolar polyethylene, engineers and technicians for the present technique field, as long as can finish design with reference to head and extruder layout inside and outside tube wall, how to extrude composite bed, method has many, no longer sets forth at this.In the compound injection moulding of its wall internal and external layer or extrude other polymer material, can finish design for pipe fitting, also no longer set forth at this with reference to quadric injection mould method or inside and outside wall double-shot moulding and relevant technologies and the mould extruded.
Fig. 3 is the infrared spectrogram of the polymer of high density polyethylene (HDPE) and maleic anhydride graft reaction.
The various embodiments described above are that foregoing of the present invention is further described, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to the foregoing description.All technology that realizes based on foregoing all belong to scope of the present invention.
Claims (14)
1, the pipeline that metal and polyethylene are compound, it is characterized in that having in the tube wall of multiple tube conduct to strengthen the tubular metal frame of body with hole, through the polyethylene continuum of the tool polar group of graft modification by the hole on the tubular metal frame in skeleton, outer surperficial secure bond and coating with skeleton, the polycthylene grafted rate of graft modification is 0.12%～1.5%, the polyethylene continuum that polar group is arranged is the polyethylene continuum with carboxyl or hydroxyl or carbonyl or anhydride group polar group, and its infrared spectrogram has the characteristic absorption peak of typical above-mentioned polar group.
2, the compound pipeline of metal as claimed in claim 1 and polyethylene is characterized in that the polyethylene continuum is is polyethylene continuum with polar group through extruder extruding graft reaction modifying by at least a in maleic anhydride and high density polyethylene (HDPE), the low density polyethylene under the peroxide grafted action of evocating.
3, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that the polyethylene continuum is that process extruder extruding graft reaction modifying under the effect of peroxide grafted initator is the polyethylene continuum with polar group by maleic anhydride and non-crosslinked heatproof polyethylene.
4, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that the polyethylene continuum is is polyethylene with polar group through extruder extruding graft reaction modifying by at least a in a kind of and high density polyethylene (HDPE) in methyl methacrylate, acrylic acid, hydroxyethyl methacrylate, the GMA, the low density polyethylene under the peroxide grafted action of evocating.
5, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene, it is characterized in that the polyethylene continuum is by maleic anhydride and polythene material, adopting solid state mechanochemistry grafting method to utilize the graft modification of millstones shape chemical reactor is the polyethylene with polar group.
6, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene, it is characterized in that the polyethylene continuum be by the polyethylene with polar group of graft modification or binder polymer with polar group with do not have the nonpolar high density polyethylene (HDPE) blend of modification to make.
7, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that tubular metal frame that the conduct with hole in the tube wall of multiple tube strengthens body is that pertusate steel band or steel plate or aluminium strip form through longitudinal curl or screw winding.
8, the compound pipeline of metal as claimed in claim 7 and polyethylene is characterized in that tubular metal frame that the conduct with hole in the tube wall of multiple tube strengthens body is pertusate steel band or aluminium strip or steel plate through longitudinal curl or screw winding through being welded.
9, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that the tubular metal frame that the conduct with hole in the tube wall of multiple tube strengthens body is that the broadwise steel wire twines warp-wise steel wire point of intersection through being welded.
10, the tubular metal frame that the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene, the conduct that it is characterized in that having in the tube wall of multiple tube hole strengthen body is that the steel wire of the steel wire of at least one left hand screw and at least one right-hand screw intersects and is entwined.
11, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that the tubular metal frame that the conduct with hole in the tube wall of multiple tube strengthens body is to be entwined through spiral by the steel wire of at least one left hand screw or the steel wire of at least one right-hand screw.
12, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that there are the electrodeposited coating of burning of preventing and erosion or the anti-corrosion of metal layer that plates with physical vacuum film plating process (PVD) in the surface that the conduct with hole in the tube wall of multiple tube strengthens the tubular Steel Skeleton of body.
13, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene, it is characterized in that the tube wall skin that forms at the compound tubular Steel Skeleton of the polyethylene continuum secure bond that polar group is arranged in the tube wall of multiple tube and/or internal layer also compound the nonpolar polyethylene layer of one deck.
14, the compound pipeline of metal as claimed in claim 1 or 2 and polyethylene is characterized in that pipe fitting is the pipe fitting that two logical or threeways or four-way or 90 ° of elbows or 45 ° of elbows and reducing have CONCENTRIC REDUCER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100204748A CN100455867C (en) | 2006-03-13 | 2006-03-13 | Pipeline of composing metal with polythene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100204748A CN100455867C (en) | 2006-03-13 | 2006-03-13 | Pipeline of composing metal with polythene |
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| Publication Number | Publication Date |
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| CN101038050A true CN101038050A (en) | 2007-09-19 |
| CN100455867C CN100455867C (en) | 2009-01-28 |
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| CNB2006100204748A Expired - Fee Related CN100455867C (en) | 2006-03-13 | 2006-03-13 | Pipeline of composing metal with polythene |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837913A (en) * | 2016-05-31 | 2016-08-10 | 太仓斯普宁精密机械有限公司 | Anti-cracking and high-temperature-resistant compound component |
| CN107011838A (en) * | 2017-04-27 | 2017-08-04 | 安徽国登管业科技有限公司 | Steel plastic compount bonding material and preparation method thereof |
| CN114670377A (en) * | 2022-04-09 | 2022-06-28 | 河北圣耐普特矿山设备有限公司 | Rubber casting pipeline vulcanization process |
| CN115355371A (en) * | 2022-08-15 | 2022-11-18 | 福州大学 | Composite pipe based on weft-knitted plain stitch metal framework and preparation method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731580A1 (en) * | 1997-07-23 | 1999-01-28 | Unicor Rohrsysteme Gmbh | Composite tubing suitable for potable water |
| CN1234987C (en) * | 2001-09-07 | 2006-01-04 | 金德铝塑复合管有限公司 | Atactic copolymerized polypropylene aluminium composite pipe and its manufacture |
| CN2649903Y (en) * | 2003-01-08 | 2004-10-20 | 成都海特管业有限公司 | Aluminium foil reinforced polypropylene pipe |
| WO2004106793A2 (en) * | 2003-05-29 | 2004-12-09 | Chitra Mohandas | Metal reinforced high density polyethylene pipes |
-
2006
- 2006-03-13 CN CNB2006100204748A patent/CN100455867C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837913A (en) * | 2016-05-31 | 2016-08-10 | 太仓斯普宁精密机械有限公司 | Anti-cracking and high-temperature-resistant compound component |
| CN107011838A (en) * | 2017-04-27 | 2017-08-04 | 安徽国登管业科技有限公司 | Steel plastic compount bonding material and preparation method thereof |
| CN114670377A (en) * | 2022-04-09 | 2022-06-28 | 河北圣耐普特矿山设备有限公司 | Rubber casting pipeline vulcanization process |
| CN115355371A (en) * | 2022-08-15 | 2022-11-18 | 福州大学 | Composite pipe based on weft-knitted plain stitch metal framework and preparation method |
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| CN100455867C (en) | 2009-01-28 |
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