CN1181276C - Stretch-orientated silane cross-linked polyethylene pipe and its preparing process - Google Patents
Stretch-orientated silane cross-linked polyethylene pipe and its preparing process Download PDFInfo
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- CN1181276C CN1181276C CNB011291559A CN01129155A CN1181276C CN 1181276 C CN1181276 C CN 1181276C CN B011291559 A CNB011291559 A CN B011291559A CN 01129155 A CN01129155 A CN 01129155A CN 1181276 C CN1181276 C CN 1181276C
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- 239000004718 silane crosslinked polyethylene Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 26
- 230000008569 process Effects 0.000 title claims description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims description 54
- 239000002131 composite material Substances 0.000 claims description 53
- 239000004698 Polyethylene Substances 0.000 claims description 50
- 150000001875 compounds Chemical class 0.000 claims description 22
- 229920000642 polymer Polymers 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 16
- 238000004132 cross linking Methods 0.000 claims description 14
- 239000004831 Hot glue Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000003301 hydrolyzing effect Effects 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 7
- 229920013716 polyethylene resin Polymers 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 4
- 239000012815 thermoplastic material Substances 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 22
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract description 7
- 229910000077 silane Inorganic materials 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract 2
- 230000002180 anti-stress Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 32
- 230000035882 stress Effects 0.000 description 14
- 229920001169 thermoplastic Polymers 0.000 description 12
- 229920003020 cross-linked polyethylene Polymers 0.000 description 9
- 239000004703 cross-linked polyethylene Substances 0.000 description 9
- 150000001282 organosilanes Chemical class 0.000 description 9
- 239000004416 thermosoftening plastic Substances 0.000 description 7
- 230000006353 environmental stress Effects 0.000 description 6
- 238000009740 moulding (composite fabrication) Methods 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000010382 chemical cross-linking Methods 0.000 description 2
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- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- 239000002937 thermal insulation foam Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a stretching-oriented silane crosslinked polythene pipe. At least one layer of silane crosslinked polyethylene material in the pipe wall of the pipe is changed into a silane crosslinked polythene structure layer by hydrolytically condensing crosslinked reaction after radial stretching oriented technology processing or radial and axial stretching oriented technology processing is carried out on the silane crosslinked polyethylene material. The pipe has the advantages of high inner pressure-bearing power, favorable anti-environmental stress cracking performance and favorable anti-stress opening cracking performance. The present invention also provides a manufacturing method for the stretching-oriented silane crosslinked polythene pipe.
Description
Technical field:
What the present invention relates to is a kind of manufacture method of tubing, particularly be a kind of manufacture method of silane cross-linked polyethylene pipe of stretch orientation.
Background technique:
The common faster polyethylene pipe of silane crosslinked polyethylene pipe and application development compares, because polyethylene is through the chemical crosslinking of silane, its linear structure changes three-dimensional shape structure into, improved poly performance significantly, its heat resistance and hot strength, heat-resistant aging, environmental stress crack resistance, electrical insulating property, barrier, anti-gasoline and aromatic hydrocarbons, creep resistance, low cracking behavior all are greatly improved, the application of original polyethylene pipe can be widened, originally use some difficult problems that exist to be overcome.Be that silane crosslinked polyethylene pipe has more performance than common polythene pipeline.
There are the people of general professional knowledge also to know, crystalline high polymer such as polypropylene, polyethylene, polystyrene, polyamides material such as be flushed with drink, it is below the viscous state temperature, the glassy state temperature is above to make its big molecular orientation arrangement can obtain tensile strength than high several times of elongated article not even ten times through unidirectional or biaxial tension, people utilize this crystalline polymer properties of materials to invent unidirectional and biaxial stretching film, utilize this characteristic to invent the plastic tube of radially simple tension or radial and axial biaxial tension orientation, load performance in these plastic tubes have better than the general not plastic tube of stretch orientation, resistance to heat, barrier property, but because plastic tube uses under stress for a long time, particularly combustion gas is with managing, to resisting environmental stress and cracking, the receptance of stress mouth cracking, the longitudinal cracking of pipe and quick cracking behavior, higher requirement is all arranged, general plastic tube does not reach requirement, so people have spent very big financial resources, material resources have been researched and developed poly PE80, the material of excellent performances such as stress crack resistant such as PE100 even PE112 improves the deficiency of the above-mentioned performance of plastic tube.People know, above-mentioned stretch orientation pipeline has increased the interior bearing capacity of pipe greatly, can save material in a large number, but the numberator height of stretch orientation goods aligns the proof stress mouth cracking performance that has also brought goods simultaneously to descend greatly, particularly the cracking perpendicular to any direction of any stress mouth of the cracking of draw direction and biaxial tension goods of simple tension goods.This mainly is because macromolecular high orientation is arranged behind the stretch orientation, it is linear structure that structure of molecule that the disorderly shape in former this part distributes and the three-dimensional structure that may exist arranged by force direction to be two dimension by stretching by height, along this two dimension is that the stressed of linear structure direction strengthened greatly, also promptly improved several times to ten times, but had structure of molecule that disorderly shape distributes and the tensile strength of the three-dimensional structure direction that may exist almost completely to lose originally along the tensile strength of this direction.Though improved greatly so elongated article is the interior bearing capacity of tubing of stretch orientation, the harmfulness of stress cracking has also improved simultaneously, and the important performances such as environmental stress crack resistance of the actual demand of tubing descend on the contrary to some extent.
Summary of the invention:
The objective of the invention is in order to overcome above deficiency, provide a kind of interior bearing capacity height, the manufacture method of the silane cross-linked polyethylene pipe of the stretch orientation that anti-environment stress cracking and stress mouth cracking performance are good.
The object of the present invention is achieved like this:
After having at least one deck silane cross-linkable polyethylene material handle in the tube material and tube wall of the present invention through radially unidirectional or radial and axial biaxial tension directional process again the hydrolytic condensation cross-linking reaction be the construction layer of organosilane crosslinked polyethylene.
Compound pipeline thermal fusion tie layer or the Bond tie layer extruded on the above-mentioned organosilane crosslinked polyethylene construction layer outer wall.
Above-mentioned tubing heat fusing tie layer or Bond tie layer adopt thermoplastic to make or adopt the blend of hot melt adhesive or hot melt adhesive and polymer to make.
The compound foam insulation of being made up of the concurrent mixture of polymer or polymer and inorganic material that flame retardant property or flame retardant property are arranged of extruding on the pipeline thermal fusion tie layer of above-mentioned tube material and tube wall or the Bond tie layer outer wall has the close layer of matter on the foam insulation.
Between above-mentioned each layer of tubing adhesive layer is arranged.
The manufacture method of the silane cross-linked polyethylene pipe of stretch orientation of the present invention is characterized in that:
(1) material that will contain polyethylene resin, organic silicon monomer, grafting initator and hydrolytic condensation catalyzer at least adds the response type extruder to extrude cooling forming is crosslinkable polyethylene tubing; Or will contain polyethylene resin at least, organic silicon monomer, material that the material of grafting initator becomes through the extruder extruding pelletization and the material that contains polyethylene resin and hydrolytic condensation catalyzer become the material blend after extruder is extruded cooling forming is crosslinkable polyethylene tubing through the extruder extruding pelletization, when extruding crosslinkable polyethylene tubing, utilize two extruders and the compound extruding pipe die head that contains at least two runners at least, the blend that can extrude composite thermoplastic material plastics or hot melt adhesive or hot melt adhesive and polymer at its pipe outer wall simultaneously becomes the crosslinkable polyethylene composite pipe;
(2) control its cooling forming temperature or reheat it is controlled in below the viscous state temperature extruding the crosslinkable polyethylene tubing of cooling forming or its composite pipe in (1), more than the glassy state temperature, tubing is carried out radially unidirectional or radial and axial biaxial tension directional process, when the stretch orientation processing only is crosslinkable polyethylene tubing, after stretch orientation is finished, the blend that utilizes extruder and cross die head to extrude composite thermoplastic material plastics or hot melt adhesive or hot melt adhesive and polymer to stretching tube outer wall becomes the crosslinkable polyethylene composite pipe, what handle when stretch orientation is the composite pipe of crosslinkable polyethylene, and utilizing extruder and cross die head to extrude the compound heat-insulation foaming layer to the composite pipe pipe outer wall that stretches stretch orientation is finished after becomes the crosslinkable polyethylene composite pipe that foams;
(3), under certain wet heat condition,, make it become the silane cross-linked polyethylene pipe of radially unidirectional or radial and axial biaxial tension orientation to the be hydrolyzed cross-linking reaction of condensation of tubing with the crosslinkable polyethylene tubing of above-mentioned stretch orientation.
It is above-mentioned that crosslinkable polyethylene tubing is carried out radially unidirectional or radial and axial bidirectional oriented stretch processing is to utilize heated fluid medium or air and the shutoff plug or the mechanical expansion device of pressure to be arranged or be opposite to cloth bag in the pipe below the viscous state temperature of this tubing, more than the glassy state temperature to inflate carry out the expander stretch orientation in managing.
It is above-mentioned that crosslinkable polyethylene tubing is carried out radially unidirectional or radial and axial bidirectional oriented stretch processing is to utilize the negative pressure method to adopt below the viscous state temperature of this tubing, more than the glassy state temperature pipe outer wall vacuumized pipe is carried out the expander stretch orientation.
Above-mentioned tubing is carried out radially unidirectional or radial and axial biaxial tension after, adopt the thermal shrinkage treating process butt joint that is equal to or higher than draft temperature to stretch pipe again and carry out thermal contraction fixation and handle.
Above-mentioned after stretch orientation is handled crosslinkable polyethylene tubing and composite pipe tubing in logical hot water or steam to the tubing condensation cross-linking reaction that is hydrolyzed, make it become silane cross-linked polyethylene pipe and composite pipe thereof, or stretch orientation after handling crosslinkable polyethylene tubing and composite pipe in the pipework construction, when tubing is connected with the tube connection piece fusion or after bonding connection becomes pipe network, logical hot water or steam make it become silane cross-linked polyethylene pipe and composite pipe thereof to the tubing condensation cross-linking reaction that is hydrolyzed in pipeline.
The interior bearing capacity ability of tubing wants high if desired, anti-environment stress cracking and stress mouth cracking performance are good again, the preferably big molecule of crystalline polymer pipe that it is contemplated that radially unidirectional or radial and axial biaxial tension orientation is height and aligns by draw direction, and this polymer has three-dimensional molecular structure simultaneously concurrently in addition.Such polymer pipe and common not stretch orientation, uncrosslinked polymer pipe relatively all performances relevant with pipe applications has all improved greatly, and particularly ageing resistance, environmental stress crack resistance, cold cracking, stress mouth cracking behavior etc. have all strengthened the prior performance of tubing.The present invention makes full use of the excellent properties that its three-dimensional structure after crosslinked is brought, and the chemical crosslinking that utilizes organosilane crosslinked polyethylene is to divide two stages to finish this operational characteristic, in this two stages, finish the stretch orientation of crosslinkable polymer tubing and the hydrolytic condensation cross-linking reaction of crosslinkable polymer pipe respectively and form three-dimensional molecular structure, finally form the cross-linked polymer pipe of stretch orientation.The present invention make full use of this pipe stretch orientation and crosslinked after three-dimensional structure make the existing radially unidirectional or radial and axial two-way height molecular orientation of this pipe arrange the high-tensile that brings, other combination property that has high environmental stress cracking resistance that the three-dimensional shape structure of macromolecules cross-linking brings and tubing to need again.For fusion connection or bonding connection performance, resisting environmental stress and cracking and the stress mouth cracking performance that further improves this pipe, and thermal insulation property, can be on the outer wall of this cross-linked polymer pipe, compound extruding handled not too big thermoplastic or Bond or the heat preserving and insulating material of back molecular orientation arrangement influence to stretch orientation before stretch orientation.If molecules align and welding after stretch orientation handled, be bonded with considerable influence, can be behind crosslinkable silane cross-linked polyethylene pipe stretch orientation, compound again extrusioning thermoplastic plastic or Bond or heat preserving and insulating material.
Bearing capacity height in the tubing of the present invention, anti-environment stress cracking and stress mouth cracking performance are good.
Adopt the inventive method can produce the silane cross-linked polyethylene pipe that can satisfy needs of production.The inventive method not only is suitable for producing silane cross-linked polyethylene pipe, and in fact crystalline high polymer such as polypropylene (PP), polystyrene (PS), polyamide (PA) and PETG (PET) can be made the polymer pipe of the crosslinked with silicane of stretch orientation separately in order to last method.Just on prescription, change polyethylene polymer into above-mentioned these materials respectively, just can make the silicone hydride crosslinked polypropylene pipe material and the composite pipe thereof of stretch orientation, or the crosslinked with silicane polyamide tubing and the composite pipe thereof of stretch orientation, or the polyethylene terephthalate's tubing and the composite pipe thereof of the crosslinked with silicane of stretch orientation.
Description of drawings:
Fig. 1 is silane cross-linked polyethylene pipe embodiment 1 structural representation of the present invention.
Fig. 2 is silane cross-linked polyethylene pipe embodiment 2 structural representations of the present invention.
Fig. 3 is silane cross-linked polyethylene pipe embodiment 3 structural representations of the present invention.
Fig. 4 is silane cross-linked polyethylene pipe embodiment 4 structural representations of the present invention.
Fig. 5 is silane cross-linked polyethylene pipe embodiment 5 structural representations of the present invention.
Fig. 6 adopts the apparatus system schematic representation of the radially unidirectional or radial and axial biaxial tension composite pipe of pressurization manufacturing in the pipe for the present invention.
Fig. 7 is the plan view of Fig. 6.
Fig. 8 is a compound crowded pipe die header structure schematic representation among Fig. 6.
Fig. 9 dilates the apparatus system schematic representation of the radially unidirectional or radial and axial biaxial tension composite pipe of manufactured for the present invention adopts machinery.
Figure 10 adopts the apparatus system schematic representation of the radially unidirectional or radial and axial biaxial tension composite pipe of negative pressure of vacuum manufactured for the present invention.
Figure 11 adopts the apparatus system schematic representation of the radially unidirectional or radial and axial biaxial tension composite pipe of cloth bag aeration manufacturing for the present invention.
Figure 12 is the manufacturing installation system schematic of the crosslinkable polyethylene tubing composite thermoplastic plastics outer wall behind the stretch orientation.
Figure 13 is the plan view of Figure 12.
Figure 14 is the manufacturing installation system schematic of the composite pipe compound heat-insulation foaming layer behind the stretch orientation.
Figure 15 is the plan view of Figure 14.
Embodiment:
Embodiment 1:
Fig. 1 has provided silane cross-linked polyethylene pipe embodiment 1 figure of the present invention.Have in the tube wall silane cross-linkable polyethylene material after radially unidirectional (or radial and axial two-way) stretch orientation process treating again the hydrolytic condensation cross-linking reaction be organosilane crosslinked polyethylene construction layer 1.
Embodiment 2:
Fig. 2 has provided silane cross-linked polyethylene pipe embodiment 2 figure of the present invention.Have in the tube wall silane cross-linkable polyethylene material after radially unidirectional (or radial and axial two-way) stretch orientation process treating again the hydrolytic condensation cross-linking reaction be organosilane crosslinked polyethylene structure internal layer 2.Extrude one deck thermoplastic and formed pipeline thermal fusion tie layer 3 (or Bond tie layer) in that organosilane crosslinked polyethylene structure internal layer 2 peripheries are compound.
Embodiment 3:
Fig. 3 has provided silane cross-linked polyethylene pipe embodiment 3 figure of the present invention.Organosilane crosslinked polyethylene structure internal layer 4 through radially unidirectional (or radial and axial two-way) stretch orientation is arranged in the tube wall.Form heat fusing tie layer 5 (Bond tie layers) in the compound one deck hot melt adhesive of organosilane crosslinked polyethylene structure internal layer 4 peripheries (or blend of hot melt adhesive and polymer).
Embodiment 4:
Fig. 4 has provided silane cross-linked polyethylene pipe embodiment 4 figure of the present invention.Present embodiment 4 basic with embodiment 2 and 3 same.Do not exist together is that the compound with it foam insulation that flame retardant property is arranged 6 for the polymer of one (or blend of polymer and inorganic material) composition is arranged on heat fusing tie layer outer wall.The close layer 7 of matter is arranged on the foam insulation 6.
Embodiment 5:
Fig. 5 has provided silane cross-linked polyethylene pipe embodiment 5 figure of the present invention.Present embodiment 5 is basic identical with embodiment 4.Not existing together is between the organosilane crosslinked polyethylene internal layer 8 and heat fusing tie layer 9 of stretch orientation, and adhesive layer 11,12 is arranged respectively between heat fusing tie layer 9 and the foam insulation 10.
The various embodiments described above tubing can adopt interior pressurization of pipe or machinery to dilate method or negative pressure of vacuum method or cloth bag aeration and make radially single or radial and axial biaxial tension composite pipe.
Fig. 6～Fig. 8 is the system schematic that adopts the radially unidirectional or radial and axial biaxial tension composite pipe of pressurization manufacturing in the pipe.Comprise two extruders 13 that connect successively, compound crowded pipe die head 14, vacuum setting machine 15, cooler bin 16, pipe tractor 17, heater 18, swell diameter detection device 19, diameter-setting equipment 20, cooler bin 21, tubing tractor 22, cutting machine 23.The cladding material material feeding mouth 24, the inner layer material material feeding mouth 25 that communicate with two extruders 13 arranged on the compound crowded pipe die head 14, be through the hydraulic pressure or the pneumatic tube 28 that are communicated with hydraulic pressure or air pressure station 27 with hydraulic pressure or pneumatic tube fixture 26 fixing ends on the die head.The hydraulic pressure or pneumatic tube 28 the other ends pass vacuum setting machine, cooler bin etc. and are communicated with the sealing plug 29 of band topping up pressure or pressure hole, and the inflation or the hydrodynamic seal plug 30 that are arranged in swell diameter detection device and positioning device are communicated with by the sealing plug 29 of hollow shaft 31 with band topping up pressure or pressure hole.During work, to contain polyethylene resin, organic silicon monomer, by the branch material of initator and thermoplastic respectively by extruder 13 from compound crowded pipe die head in, the cladding material import enters in the compound crowded pipe die head, compound extrude have can hand over polyethylene inner layer 32 and be compound in outer thermoplastic layer 33 on internal layer 32 outer walls through vacuum setting machine 15 typings after cooler bin 16 cooling formings become unstretched composite pipe 34 after again heater via 18 reheat it be controlled in below the viscous state temperature, more than the glassy state temperature, this moment hydraulic pressure or air pressure station to hydraulic pressure or pneumatic tube for liquid or gas, making it to expand by hollow shaft 31 inflations (liquid) forms the 35 pairs of composite pipes of cavity that are full of hydraulic pressure or air pressure and carries out the expander stretch orientation and become radially unidirectional (or radial and axial two-way) stretching composite pipe 36.
Fig. 9 adopts machinery to dilate the radially system schematic of simple tension or radial and axial biaxial tension composite pipe of manufactured.The employed device of native system is identical with the employed device of pressurization in the pipe substantially.Not existing together is to have machinery to dilate device 37 in the pipe between heater, external diameter diameter-setting equipment, and machinery dilates between device and the die head the pulling shaft 38 that is connected with the two.
Figure 10 adopts the radially system schematic of simple tension or radial and axial biaxial tension composite pipe of negative pressure of vacuum manufactured.The employed device of native system is identical with the employed device of pressurization in the pipe substantially.Not existing together is between heater and tubing tractor vacuum chamber 39 to be arranged, and vacuum chamber 40, contains the vacuum sizing cooling unit 42 of calibration sleeve 41.
Figure 11 adopts the cloth bag aeration to make the system schematic of radially simple tension or radial and axial biaxial tension composite pipe.The employed device of the native system employed device of pressurization basic and in the pipe is identical.Do not exist together is that pneumatic tube 44 two ends that are through between compound crowded pipe die head vacuum setting machine, cooler bin, pipe tractor and heater are communicated with air pressure station and inflation cloth bag respectively at swell diameter detection device and the fixed inflation cloth bag 43 that is equipped with in device of external diameter.Between external diameter diameter-setting equipment and tubing tractor, be provided with cooling and shaping device 45.
Figure 12, Figure 13 are the system diagrams that becomes the crosslinkable polyethylene composite pipe for the crosslinkable polyethylene tubing composite thermoplastic plastics of stretch orientation.Native system is to have adopted two diameter-setting equipments on the basis of the device of Fig. 6～shown in Figure 8.The cross die head 47 that between two diameter-setting equipments, increased extruder 46, communicates with extruder 46, the crosslinkable polyethylene tubing 36 of drawn orientation is when cross die head 47, extruder 46 is clamp-oned cross die head with the thermoplastic of molten state, compound one deck thermoplastic on crosslinkable polyethylene tubing 36 outer walls of drawn orientation and form thermoplastic plastic layer 48 and form crosslinkable polyethylene composite pipe 49 through diameter-setting equipment, cooler bin again.
Figure 14, Figure 15 become the system diagram of cross-linking foamed composite pipe for the crosslinkable polyethylene tubing composite foamed plastic of stretch orientation.It is basic identical that manufacturing composite thermoplastic plastics shown in native system figure and Figure 12, Figure 13 become the device of crosslinkable polymerization pipe.Do not exist together is that crosslinkable polyethylene composite pipe when the drawn orientation is during through cross die head, extruder is clamp-oned the expandable plastic of molten state in the cross die head, the heat insulation foam material of compound thereon one deck and form that footpath, heat insulation foaming layer 50 back is fixed to become crosslinkable polyethylene foaming composite pipe 51 through device, cooler bin.
Crosslinkable polyethylene tubing and composite pipe thereof after stretch orientation is handled, logical hot water or steam make it become silane cross-linked polyethylene pipe and composite pipe thereof to the condensation cross-linking reaction that is hydrolyzed of crosslinkable polyethylene tubing in tubing.Or stretch orientation after handling crosslinkable polyethylene tubing and composite pipe in the pipework construction, when tubing is connected with the tube connection piece fusion or after bonding connection becomes pipe network, water flowing or steam make it become silane cross-linked polyethylene pipe and composite pipe thereof to the be hydrolyzed condensation cross-linking reaction of crosslinkable polyethylene tubing in pipeline.
Claims (5)
1, the silane cross-linked polyethylene pipe manufacture method of stretch orientation is characterized in that:
(1) material that will contain polyethylene resin, organic silicon monomer, grafting initator and hydrolytic condensation catalyzer at least adds the response type extruder to extrude cooling forming is crosslinkable polyethylene tubing; Or will contain polyethylene resin at least, organic silicon monomer, material that the material of grafting initator becomes through the extruder extruding pelletization and the material that contains polyethylene resin and hydrolytic condensation catalyzer become the material blend after extruder is extruded cooling forming is crosslinkable polyethylene tubing through the extruder extruding pelletization, when extruding crosslinkable polyethylene tubing, utilize two extruders and the compound extruding pipe die head that contains at least two runners at least, the blend that can extrude composite thermoplastic material plastics or hot melt adhesive or hot melt adhesive and polymer at its pipe outer wall simultaneously becomes the crosslinkable polyethylene composite pipe;
(2) control its cooling forming temperature or reheat it is controlled in below the viscous state temperature extruding the crosslinkable polyethylene tubing of cooling forming or its composite pipe in (1), more than the glassy state temperature, tubing is carried out radially unidirectional or radial and axial biaxial tension directional process, when the stretch orientation processing only is crosslinkable polyethylene tubing, after stretch orientation is finished, the blend that utilizes extruder and cross die head to extrude composite thermoplastic material plastics or hot melt adhesive or hot melt adhesive and polymer to stretching tube outer wall becomes the crosslinkable polyethylene composite pipe, what handle when stretch orientation is the composite pipe of crosslinkable polyethylene, and utilizing extruder and cross die head to extrude the compound heat-insulation foaming layer to stretch orientation composite pipe pipe outer wall stretch orientation is finished after becomes the crosslinkable polyethylene composite pipe that foams;
(3), under wet heat condition,, make it become the silane cross-linked polyethylene pipe of radially unidirectional or radial and axial biaxial tension orientation to the be hydrolyzed cross-linking reaction of condensation of tubing with the crosslinkable polyethylene tubing of above-mentioned stretch orientation.
2, the manufacture method of the silane cross-linked polyethylene pipe of stretch orientation according to claim 1 is characterized in that it is to utilize heated fluid medium that pressure is arranged or air and shutoff plug or or mechanical expansion device or be opposite to cloth bag in the pipe and inflate carry out the expander stretch orientation in managing below the viscous state temperature of this tubing, more than the glassy state temperature that crosslinkable polyethylene tubing is carried out radially unidirectional or radial and axial bidirectional oriented stretch processing.
3, the manufacture method of the silane cross-linked polyethylene pipe of stretch orientation according to claim 1 is characterized in that it is to utilize the employing of negative pressure method that the pipe outer wall is vacuumized pipe is carried out the expander stretch orientation that crosslinkable polyethylene tubing is carried out radially unidirectional or radial and axial bidirectional oriented stretch processing below the viscous state temperature of this tubing, more than the glassy state temperature.
4, the manufacture method of the silane cross-linked polyethylene pipe of stretch orientation according to claim 1, after it is characterized in that tubing carried out radially unidirectional or radial and axial biaxial tension, adopt the thermal shrinkage treating process butt joint that is equal to or higher than draft temperature to stretch pipe again and carry out thermal contraction fixation and handle.
5, the manufacture method of the silane cross-linked polyethylene pipe of stretch orientation according to claim 1, it is characterized in that be in crosslinkable polyethylene tubing after stretch orientation is handled and the composite pipe tubing thereof logical hot water or steam to the tubing condensation cross-linking reaction that is hydrolyzed, make it become silane cross-linked polyethylene pipe and composite pipe thereof, or stretch orientation after handling crosslinkable polyethylene tubing and composite pipe in the pipework construction, when tubing is connected with the tube connection piece fusion or after bonding connection becomes pipe network, logical hot water or steam make it become silane cross-linked polyethylene pipe and composite pipe thereof to the tubing condensation cross-linking reaction that is hydrolyzed in pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011291559A CN1181276C (en) | 2001-12-07 | 2001-12-07 | Stretch-orientated silane cross-linked polyethylene pipe and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011291559A CN1181276C (en) | 2001-12-07 | 2001-12-07 | Stretch-orientated silane cross-linked polyethylene pipe and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1351237A CN1351237A (en) | 2002-05-29 |
| CN1181276C true CN1181276C (en) | 2004-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011291559A Expired - Fee Related CN1181276C (en) | 2001-12-07 | 2001-12-07 | Stretch-orientated silane cross-linked polyethylene pipe and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1181276C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7086421B2 (en) * | 2002-07-23 | 2006-08-08 | Noveon Ip Holdings Corp. | Crosslinked polyethylene pipe having a high density polyethylene liner |
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2001
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| CN1351237A (en) | 2002-05-29 |
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Effective date of registration: 20130626 Address after: 610100, No. 103, Xingguang Road, Chengdu economic and Technological Development Zone, Longquanyi District, Chengdu, Sichuan Patentee after: Dongtai New Material Science ang Technology Co., Ltd., Sichuan Address before: 610041 Sichuan city of Chengdu province high tech Zone Shenxianshu Dongtai Industrial Zone (Chengdu) Industrial Co. Ltd. Patentee before: Gan Guogong |
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