CN102767652A - Heat-resisting polyethylene composite pipe and preparation method thereof - Google Patents
Heat-resisting polyethylene composite pipe and preparation method thereof Download PDFInfo
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- CN102767652A CN102767652A CN2012102701558A CN201210270155A CN102767652A CN 102767652 A CN102767652 A CN 102767652A CN 2012102701558 A CN2012102701558 A CN 2012102701558A CN 201210270155 A CN201210270155 A CN 201210270155A CN 102767652 A CN102767652 A CN 102767652A
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Abstract
The invention provides a heat-resisting polyethylene composite pipe and a preparation method of the heat-resisting polyethylene composite pipe. The invention provides the heat-resisting polyethylene composite pipe which can be used as a water inlet pipe and a water outlet pipe of a water faucet, a water inlet pipe of a shower head, a toilet water inlet pipe, a floor heating pipe and the like, and also provides the preparation method of the heat-resisting polyethylene composite pipe. The heat-resisting polyethylene composite pipe comprises an inner pipe and an outer pipe; the inner pipe is a heat-resisting polyethylene pipe and the outer pipe is a cross-linked modified heat-resisting polyethylene pipe; and the outer pipe is covered outside the inner pipe. By a twice extruding and cladding manner, the inner pipe is firstly extruded and then another extruding machine is used; and a heat-resisting polyethylene material added with a cross-linking agent is covered on the inner pipe to form a cross-linked modified heat-resisting polyethylene outer pipe, so that the inner pipe and the outer pipe are tightly connected to form the heat-resisting polyethylene composite pipe.
Description
Technical field
The present invention relates to a kind of polyethylene compound pipe, especially relate to a kind of heat-proof polythene composite pipe and preparation method thereof.
Background technique
At present, the bathroom industry is used a large amount of flexible pipes, is mainly used in to connect various water outlet parts; For example be used for the flexible pipe that gondola water faucet connects valve; Intake pipe that intake pipe that water tap is used and outlet pipe, water closet cistern fittings are used and outlet pipe, the floor heating pipe that use down on the floor etc.These pipes are mainly by the extruding and moulding of various soft plastic material.For example: soft PVC (FPVC), polypropylene (PP), crosslinked polyethylene (PEX), heat-proof polythene materials such as (PE-RT).
The flexible pipe of unlike material, owing to receive the restriction of material property, restricted application, for example soft PVC (FPVC) pipe can only be used for the outlet pipe under normal temperature, the low pressure condition, and polypropylene (PP) pipe then can not be used for the cold area of low temperature.At present, the best flexible pipe of performance mainly is that polythene material is main flexible pipe, and crosslinked polyethylene (PEX) and heat-proof polythene (PE-RT) are arranged.But crosslinked polyethylene (PEX) material contains crosslinking agent, influences the health of potable water.Heat-proof polythene (PE-RT) then is the material of a environmental protection sanitary.
The composite pipe of also forming in the market by some crosslinked polyethylenes and non-crosslinked polyethylene.For example: Chinese patent 02133610.5 adopted pipe in the crosslinked polyethylene and with crosslinked polyethylene in the complex method of the compound non-cross-linking refractory polyethylene outer tube of pipe.Though the method has improved hose strength, because interior pipe adopts cross-linked material, not environmental protection.Also have Chinese patent 201020283057.4 to adopt pipe and UHMWPE-RT (ultra-high molecular weight polyethylene) outer tube in common PE-RT.Though the method has improved the intensity of flexible pipe, also environmental protection simultaneously.But UHMWPE-RT (ultra-high molecular weight polyethylene) is because molecular weight is too big, and viscosity of material is too high in the time of melt-processed, is not suitable for doing tubing and extrudes.In the actual production and be not easy to realize.
Summary of the invention
The object of the present invention is to provide a kind of heat-proof polythene composite pipe that can be used as water tap intake pipe and outlet pipe, gondola water faucet intake pipe, toilet intake pipe and floor heating pipe etc. and preparation method thereof.
Pipe and outer tube in said heat-proof polythene composite pipe is provided with, said interior pipe is heat-proof polythene (PE-RT) pipe, and said outer tube is cross-linking modified heat-proof polythene (PE-RT) pipe, and said outer tube is coated on outside the interior pipe.
The thickness of pipe can be 0.5～2.0mm in said, and the thickness of said outer tube can be 1.0～2.0mm.
The preparation method of said heat-proof polythene composite pipe is following:
Extrude the mode of coating through secondary; Extrude interior pipe earlier; Re-use another extruder, on the pipe, form cross-linking modified heat-proof polythene outer tube in being coated to the heat-proof polythene that has added crosslinking agent (PE-RT) material; Pipe closely is connected with outer tube in making, and forms complete heat-proof polythene composite pipe.
In the heat-proof polythene of said crosslinking agent (PE-RT) material, the adding quantity of crosslinking agent can be 0.2%～4% of heat resistant polyethylene material by mass ratio.
Said crosslinking agent can be selected from silane crosslinker etc., as: a kind of in vinyltrimethoxy silane, the VTES etc.
Said heat-proof polythene (PE-RT) material is used for the PE-RT material that flexible pipe is extruded for buying is common on market.As: the DX800 of Korea S SK company, the DOWLEX2344,2388 of U.S. DOW chemical company, the XRT70 of Dao Daer petro-chemical corporation etc.
Said cross-linking modified PE-RT (heat-proof polythene) outer tube; Be meant before extruding and moulding; In common PE-RT (heat-proof polythene) material, add crosslinking agent, make heat-proof polythene (PE-RT) in the process that melt extrudes through extruder, begin to take place cross-linking reaction; When managing in being coated at last, form crosslinked PE-RT layer.
Composite heat resistance polythene PE of the present invention-RT flexible pipe has very high intensity, and is simple in structure, and manufacturing efficiency is high, long service life, and U.S. NSF authentication is satisfied in environmental protection.Show according to burst pressure testing standard ASMEA112.18.1-2005 test result: the burst pressure of the link structure of composite heat resistance polyethylene pipe reaches more than the 800Psi.
Compared with prior art, the present invention has advantage:
1) because the PE-RT material of the interior Guan Guanwei environmental protection of composite heat resistance polythene PE-RT flexible pipe can pass through the NSF authentication, protects, can be used for the intake pipe of potable water than PEX pipe ring.
2) because the outer tube pipe of composite heat resistance polythene PE-RT flexible pipe adopts the crosslinked PE-RT material through cross-linking reaction.Make the intensity and the heat-resisting quantity of pipe improve, have more performance than common individual layer PE-RT material earlier.
3) composite heat resistance polythene PE of the present invention-RT flexible pipe has the intensity same with PEX, but have better pliability than PEX, back processing such as can also weld simultaneously.Be more suitable for the sanitaryware requirement.
Description of drawings
Fig. 1 is that heat-proof polythene composite pipe embodiment's according to the invention structure is formed schematic representation.In Fig. 1, respectively be labeled as: pipe in 1,2 outer tubes.
Fig. 2 is the generalized section that heat-proof polythene composite pipe embodiment's according to the invention structure is formed.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As illustrated in fig. 1 and 2, pipe 1 and outer tube 2 in said heat-proof polythene composite pipe embodiment is provided with, said interior pipe 1 is heat-proof polythene (PE-RT) pipe, said outer tube 2 is cross-linking modified heat-proof polythene (PE-RT) pipe, manages outside 1 in said outer tube 2 is coated on.
The thickness of pipe 1 is 0.5～2.0mm in said, and the thickness of said outer tube 2 is 1.0～2.0mm.
The preparation method of said heat-proof polythene composite pipe is following:
Extrude the mode of coating through secondary; Pipe 1 in extruding earlier; Re-use another extruder, on the pipe 1, form cross-linking modified outer tube 2 in being coated to the heat-proof polythene that has added crosslinking agent (PE-RT) material; In making pipe 1 and outer tube 2 both closely be connected, form complete heat-proof polythene composite pipe.
In the heat-proof polythene of said crosslinking agent (PE-RT) material, the adding quantity of crosslinking agent can be 0.2%～4% of heat resistant polyethylene material by mass ratio.
Said crosslinking agent can be selected from silane crosslinker etc., as: a kind of in vinyltrimethoxy silane, the VTES etc.;
Said PE-RT material is used for the PE-RT material that flexible pipe is extruded for buying is common on market.As: the DX800 of Korea S SK company, the DOWLEX2344,2388 of U.S. DOW chemical company, the XRT70 of Dao Daer petro-chemical corporation etc.
Said cross-linking modified PE-RT (heat-proof polythene) outer tube; Be meant before extruding and moulding; In common PE-RT (heat-proof polythene) material, add crosslinking agent, make heat-proof polythene (PE-RT) in the process that melt extrudes through extruder, begin to take place cross-linking reaction; When managing in being coated at last, form crosslinked PE-RT layer.Through selecting suitable crosslinking agent, common PE-RT material is carried out cross-linking reaction, make the performance of material get a promotion, various material property contrasts are as shown in table 1.
Table 1
Can find out that by table 1 each item performance of the PE-RT material that cross-linking reaction makes has all improved, especially tensile strength.Thereby guaranteed that flexible pipe in use can bear higher bursting pressure.In the various process materials of cross-linking reaction, the combination property of PE-RT material is optimum simultaneously.Especially with common PEXb material contrast.Under the constant prerequisite of tensile strength, the fracture elongation of material is with high, and modulus is littler.Therefore just soft more.When being used to make bathroom pipe pipe, has better bend ductility.
Claims (8)
1. a heat-proof polythene composite pipe is managed and outer tube in it is characterized in that being provided with, and said interior pipe is heat-resisting polyethylene tube, and said outer tube is cross-linking modified heat-resisting polyethylene tube, outside managing in said outer tube is coated on.
2. a kind of heat-proof polythene composite pipe as claimed in claim 1 is characterized in that the thickness of said interior pipe is 0.5～2.0mm, and the thickness of said outer tube is 1.0～2.0mm.
3. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 1 is characterized in that its concrete steps are following:
Extrude the mode of coating through secondary, extrude interior pipe earlier, re-use another extruder; Be coated to the heat resistant polyethylene material that has added crosslinking agent on the interior pipe; Form cross-linking modified heat-proof polythene outer tube, pipe closely is connected with outer tube in making, and forms complete heat-proof polythene composite pipe.
4. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 3 is characterized in that in the heat resistant polyethylene material of said crosslinking agent that the adding quantity of crosslinking agent is 0.2%～4% of a heat resistant polyethylene material by mass ratio.
5. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 3 is characterized in that said crosslinking agent is selected from silane crosslinker.
6. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 5 is characterized in that said silane crosslinker is selected from a kind of in vinyltrimethoxy silane, the VTES.
7. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 3; It is characterized in that said heat resistant polyethylene material is used for the PE-RT material that flexible pipe is extruded for buying is common on market; Commonly on the said market be used for the DX800 that PE-RT material that flexible pipe extrudes is selected from Korea S SK company; The DOWLEX2344,2388 of U.S. DOW chemical company, the XRT70 of Dao Daer petro-chemical corporation.
8. the preparation method of a kind of heat-proof polythene composite pipe as claimed in claim 3; It is characterized in that said cross-linking modified heat-proof polythene outer tube, be meant before extruding and moulding, in common heat resistant polyethylene material; Add crosslinking agent; Make heat-proof polythene in the process that melt extrudes through extruder, begin to take place cross-linking reaction, when managing in being coated at last, form crosslinked heat-proof polythene layer.
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| CN102767652B CN102767652B (en) | 2014-09-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974393A (en) * | 2014-04-02 | 2015-10-14 | 浙江曼瑞德舒适系统有限公司 | Composition of thermoplastic PEX (cross-linked polyethylene) tubular product and manufacturing method thereof |
| CN105972337A (en) * | 2016-06-23 | 2016-09-28 | 康泰塑胶科技集团有限公司 | Abrasion-resisting, heat-resisting, antibacterial and scale-preventing steel wire skeleton pipe and manufacturing method thereof |
| CN109575401A (en) * | 2018-11-30 | 2019-04-05 | 重庆爵通塑胶科技(集团)有限公司 | Heat-proof polythene multiple tube |
| CN110789093A (en) * | 2019-10-31 | 2020-02-14 | 杜永明 | Method for manufacturing polyethylene composite pipe |
| CN110815767A (en) * | 2019-11-19 | 2020-02-21 | 杜永明 | Manufacturing method of heat-resistant polyethylene composite pipe |
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| CN104974393A (en) * | 2014-04-02 | 2015-10-14 | 浙江曼瑞德舒适系统有限公司 | Composition of thermoplastic PEX (cross-linked polyethylene) tubular product and manufacturing method thereof |
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| CN109575401A (en) * | 2018-11-30 | 2019-04-05 | 重庆爵通塑胶科技(集团)有限公司 | Heat-proof polythene multiple tube |
| CN110789093A (en) * | 2019-10-31 | 2020-02-14 | 杜永明 | Method for manufacturing polyethylene composite pipe |
| CN110815767A (en) * | 2019-11-19 | 2020-02-21 | 杜永明 | Manufacturing method of heat-resistant polyethylene composite pipe |
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| CN102767652B (en) | 2014-09-10 |
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Address after: 361000 First and Five Floors of Main Building of No. 198-204 Yingyao Road, Jimei District, Xiamen City, Fujian Province Patentee after: Xiamen Aspis Intelligent Manufacturing System Co., Ltd. Address before: 361021, 618, 621 and 622, 6th floor, 1616 Guankou Middle Road, Jimei District, Xiamen City, Fujian Province Patentee before: Xiamen Aspis Intelligent Manufacturing System Co., Ltd. |
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