CN204729780U - A kind of anti-scratch polyethylene composite pipe - Google Patents
A kind of anti-scratch polyethylene composite pipe Download PDFInfo
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- CN204729780U CN204729780U CN201520457600.0U CN201520457600U CN204729780U CN 204729780 U CN204729780 U CN 204729780U CN 201520457600 U CN201520457600 U CN 201520457600U CN 204729780 U CN204729780 U CN 204729780U
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- polyethylene
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- organosilane crosslinked
- scratch
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Abstract
An anti-scratch polyethylene composite pipe, belongs to composite plastic pipe technical field.It comprises organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer coextrusion mold, arrange one group of wire between organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, described wire embeds the outer internal surface of organosilane crosslinked polyethylene.The utility model is by adopting high withstand voltage high density polyethylene (HDPE) at internal layer, for PE100 rank, its MRS value is 10MPa, the outer organosilane crosslinked polyethylene adopting ambient self-crosslinking, internal and external layer co-extrusion is one-body molded, for completely glutinous junction structure, Presence of an interface is not separated, between two-layer, wire is set, can be used for pipe buried after coordinate detection, its structure is simple, reasonable in design, there is better anti-scratch ability, resistance to Slow Crack increases and resistance to rapid crack scalability, make fuel tube non-excavation laying safety and reliability.
Description
Technical field
The utility model belongs to composite plastic pipe technical field, is specifically related to the anti-scratch polyethylene composite pipe at hdpe pipe top layer co-extrusion last layer with the crosslinked polyethylene of high Scratch Resistance energy.
Background technique
Nearly ten years, non-excavation laying and the fast development of laying without sand, PE pipeline becomes no-dig technique and the first-selection without sand tubing with the pliability of its excellence.But, in work progress, the artificial scratch that causes and the surrounding environment (such as sandstone) of pulling is withstood pipe outer surface and is formed point load, area of stress concentration can be formed and then produce crazing, after causing pipeline scuffing or generation crazing, bearing capacity significantly declines, booster is easily caused to leak, gas leakage accident.New construction process is had higher requirement to the anti-scratch performance of tubing and detectivity, considers cost reason, and current industry adopts the material in the outer co-extrusion one deck scratch-resistant of PE tubing substantially.
Existing PE anti-scratch pipe compound mainly contains this few class: polypropylene protection pipeline, outer PP low temperature brittleness is large, obvious stratification is had with internal layer PE, easily causing displacement when non-excavation laying because pulling, coming off, and do not have the effect of protective layer, and need delamination welding during its connection, operation inconvenience; This product of super tough PE100-RC of a new generation is for the special raw material changing field exploitation, current use is more, but has higher requirement under the execution conditions of some harshnesses or in the anti-scratch performance of field (gas pipeline) to tubing that safety requirement is higher.
The anti-scratch performance of silane crosslinked polyethylene: compared with PE100-RC, improves 1.5 times, is current ideal anti-scratch material.But because it exists side reaction in tubing production process, and crosslinking rate is comparatively slow, be difficult to produce heavy caliber wall thickness tubing.
Model utility content
For the above-mentioned problems in the prior art, the purpose of this utility model is to provide a kind of anti-scratch polyethylene composite pipe at hdpe pipe top layer co-extrusion last layer with the crosslinked polyethylene of high Scratch Resistance energy.
Described a kind of anti-scratch polyethylene composite pipe, it is characterized in that comprising organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, described organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer coextrusion mold, arrange one group of wire between organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, described wire embeds the outer internal surface of organosilane crosslinked polyethylene.
Described a kind of anti-scratch polyethylene composite pipe, is characterized in that organosilane crosslinked polyethylene outer layer thickness accounts for the 5-15% of tubing total thickness, and high density polyethylene (HDPE) internal layer thickness accounts for the 85-95% of tubing total thickness.
Described a kind of anti-scratch polyethylene composite pipe, is characterized in that wire diameter is 1.5-3mm, is preferably 2mm, wire of the present utility model uses the size of this restriction, the accuracy of coordinate detection can be ensured, imporosity can be made again good, make to be connected between its with internal and external layer better.
Above-mentioned a kind of anti-scratch polyethylene composite pipe, comprise organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, described organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer coextrusion mold, between organosilane crosslinked polyethylene skin and high density polyethylene (HDPE) internal layer, one group of wire is set, described wire embeds the outer internal surface of organosilane crosslinked polyethylene, in anti-scratch polyethylene composite pipe total thickness for 100%, organosilane crosslinked polyethylene outer layer thickness accounts for 5-15%, and high density polyethylene (HDPE) internal layer thickness accounts for 85-95%.The utility model is by adopting above-mentioned technology, its internal layer adopts high withstand voltage high density polyethylene (HDPE), for PE100 rank, its MRS value is 10MPa, the outer organosilane crosslinked polyethylene adopting ambient self-crosslinking, internal and external layer co-extrusion is one-body molded, for completely glutinous junction structure, not Presence of an interface be separated, between two-layer, wire is set, can be used for pipe buried after coordinate detection, its structure is simple, reasonable in design, there is better anti-scratch ability, resistance to Slow Crack increases and resistance to rapid crack scalability, make fuel tube non-excavation laying safety and reliability.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is generalized section of the present utility model.
In figure: 1-organosilane crosslinked polyethylene is outer; 2-high density polyethylene (HDPE) internal layer; 3-wire.
Embodiment
The utility model is further illustrated below in conjunction with Figure of description.
As shown in Figure 1, anti-scratch polyethylene composite pipe of the present utility model, comprise organosilane crosslinked polyethylene outer 1 and high density polyethylene (HDPE) internal layer 2, described organosilane crosslinked polyethylene outer 1 and high density polyethylene (HDPE) internal layer 2 coextrusion mold, arrange one group of wire 3 between organosilane crosslinked polyethylene outer 1 and high density polyethylene (HDPE) internal layer 2, described wire 3 embeds outer 1 internal surface of organosilane crosslinked polyethylene, and this wire 3 can be copper wire or steel wire, its diameter is 1.5-3mm, is preferably 2mm; In anti-scratch polyethylene composite pipe total thickness for 100%, outer 1 thickness of organosilane crosslinked polyethylene accounts for 5-15%, and high density polyethylene (HDPE) internal layer 2 accounts for 85-95%.
The preparation process of anti-scratch polyethylene composite pipe of the present utility model is as follows: adopt 2 extruders and a co-extrusion die head, wire cloth string holes is had before outer tube extrusion die, one-body molded with inside and outside tubing common wire, its technique is simple, tubing overall performance is superior, and the application for the non-excavation laying of gas pipeline provides reliable technical foundation; Compared with double-deck cross-linked polyethylene layer, while Simplified flowsheet, reduce cost.Existing market gas pipeline used is mainly based on polyethylene, and increase the popularization that one deck cross-linked polyethylene layer is easy to commercially on its basis, and the utility model adopts quick cross-linked polyvinyl (PEX) technique, crosslinking rate is fast, reaction region is gentle, produce material resistance to swelling and creep resistance high, than common polythene tubing, there is better anti-scratch performance, can as the layer structure of our multiple tube.
Shown in the above and figure is only preferred implementation of the present utility model.It should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model principle, can also make some modification and improvement, these also should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. an anti-scratch polyethylene composite pipe, it is characterized in that comprising organosilane crosslinked polyethylene skin (1) and high density polyethylene (HDPE) internal layer (2), described organosilane crosslinked polyethylene skin (1) and high density polyethylene (HDPE) internal layer (2) coextrusion mold, arrange one group of wire (3) between organosilane crosslinked polyethylene skin (1) and high density polyethylene (HDPE) internal layer (2), described wire (3) embeds organosilane crosslinked polyethylene skin (1) internal surface.
2. a kind of anti-scratch polyethylene composite pipe according to claim 1, it is characterized in that organosilane crosslinked polyethylene skin (1) thickness accounts for the 5-15% of tubing total thickness, high density polyethylene (HDPE) internal layer (2) thickness accounts for the 85-95% of tubing total thickness.
3. a kind of anti-scratch polyethylene composite pipe according to claim 1, is characterized in that wire (3) diameter is 1.5-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457600.0U CN204729780U (en) | 2015-06-30 | 2015-06-30 | A kind of anti-scratch polyethylene composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457600.0U CN204729780U (en) | 2015-06-30 | 2015-06-30 | A kind of anti-scratch polyethylene composite pipe |
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| Publication Number | Publication Date |
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| CN204729780U true CN204729780U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520457600.0U Active CN204729780U (en) | 2015-06-30 | 2015-06-30 | A kind of anti-scratch polyethylene composite pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306103A (en) * | 2018-09-30 | 2019-02-05 | 康泰塑胶科技集团有限公司 | A kind of scratch resistance cracks at a slow speed PE gas pipeline and preparation method thereof |
-
2015
- 2015-06-30 CN CN201520457600.0U patent/CN204729780U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306103A (en) * | 2018-09-30 | 2019-02-05 | 康泰塑胶科技集团有限公司 | A kind of scratch resistance cracks at a slow speed PE gas pipeline and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |