CN2200092Y - Polyethylene clad steel pipe with rubber coating aluminium foil layer - Google Patents
Polyethylene clad steel pipe with rubber coating aluminium foil layer Download PDFInfo
- Publication number
- CN2200092Y CN2200092Y CN 94220156 CN94220156U CN2200092Y CN 2200092 Y CN2200092 Y CN 2200092Y CN 94220156 CN94220156 CN 94220156 CN 94220156 U CN94220156 U CN 94220156U CN 2200092 Y CN2200092 Y CN 2200092Y
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- China
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- layer
- steel pipe
- polyethylene
- aluminium foil
- tenaplate
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Abstract
The utility model relates to a polyethylene clad steel pipe with rubber coating aluminium foil layer for an underground antiseptic pipeline, which comprises a steel pipe, an epoxy priming layer, a polyethylene clad layer and a rubber coating aluminium foil layer. The rubber coating aluminium foil layer thereof is composed of adhesive layers coated on two aluminium foil faces, wherein, the adhesive layer is composed of ethylene-vinyl acetate copolymer, neoprene, bitumen, talcum powder, paraffin, polyisobutylene, thiodipropionate, etc. The utility model has favorable bonding property, the cracking of the polyethylene clad layer can be prevented, and the anticorrosive capability of the steel pipe can be improved.
Description
The utility model relates to a kind of polyethylene that has the tenaplate layer that is used for underground anti-corrosion pipeline and coats steel pipe, comprises steel pipe, epoxy primer layer and polyethylene clad.
Existing polyethylene coats steel pipe, comprises steel pipe, primer layer and polyethylene clad.Primer layer adopts pitch primer layer, random polypropylene primer layer, olefin resin primer layer, rubber sole glue-line etc. more, and the adhesion strength of these primer layers and polyethylene clad is lower, and peel strength is low, generally is about 20N/cm.In addition, because easy embrittlement during pitch primer layer low temperature, random polyethylene primer layer loses cohesiveencess when low temperature, cohesiveencess is also not enough under the normal temperature, rubber sole glue-line shear strength is low, during high temperature (190 ℃) viscosity height be unfavorable for the construction, olefin resin primer layer softening point is low, these all impel the polyethylene clad yielding under external force and cause the cracking.Japan publication JP60-36159 discloses a kind of steel sheet pile corrosion protection method for coating, adopt the three-decker of steel pipe, prime coat, polyethylene extrusion clad, its deficiency is to adopt the olefin resin primer layer, the low adhesion strength with the polyethylene extrusion clad of softening point is lower, easily causes cracking.
The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, provide a kind of anti-corrosion performance high, polyethylene that the polyethylene clad is not easy to crack, that have the tenaplate layer coats steel pipe.
The purpose of this utility model can reach by following measure: a kind of polyethylene that has the tenaplate layer of the present utility model coats steel pipe, comprise steel pipe 1, epoxy primer layer 2, polyethylene clad 3, it is characterized in that between epoxy primer layer 2 and polyethylene clad 3, having tenaplate layer 4, tenaplate layer 4 is wrapped on the epoxy primer layer 2 with banded material, tenaplate layer 4 is by adhesive layer 5, aluminium foil layer 6 and adhesive layer 5 ' formation, adhesive layer 5, or adhesive layer 5 ' be by ethylene-vinyl acetate copolymer 100 weight portions, neoprene 10～20 weight portions, pitch 50～100 weight portions, French chalk 20～50 weight portions, paraffin 40～60 weight portions, polyisobutylene 20～40 weight portions, thiodipropionate 0.5～1.0 weight portion constitutes.
The purpose of this utility model can also reach by following measure.The polyethylene that has the tenaplate layer of the present utility model coats steel pipe, its steel pipe (1) is caliber 20～800mm, below the length 24m, the thickness of epoxy primer layer 2 is 0.06～0.1mm, the thickness of polyethylene clad 3 is 2.0～3.5mm, the thickness of tenaplate layer 4 is 0.30～0.50mm, wherein adhesive layer 5 or adhesive layer 5 ' thickness respectively are 0.06～0.15mm, aluminium foil layer 6 thickness 0.18～0.20mm.
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 represents that the polyethylene that has the tenaplate layer of the present utility model coats the side view of steel pipe.Fig. 2 represents the side view of tenaplate layer.
Among the figure: the 1-steel pipe; The 2-epoxy primer layer.
3-polyethylene clad; 4-tenaplate layer.
5-adhesive layer, 5 '-adhesive layer, 6-aluminium foil layer
Further specify below process of the present utility model. At first the crude removal derusting by sandblasting is removed on steel pipe 1 surface; Apply epoxy primer layer 2, be preheating to 150～200 ℃, with aluminium foil 6 with adhesive layer 5 on the banded blade coating and adhesive layer 5 ', then rubber coating aluminium foil layer 4 is wound into epoxy primer layer 2 above, lap width overlaps by 1/2 of rubber coating aluminium foil layer 4 bandwidth; Polyethylene extrusion clad 3 on rubber coating aluminium foil layer 4, cooling obtains the polyethylene clad steel pipe with rubber coating aluminium foil layer of the present utility model then.
Embodiment 1
Get the steel pipe of caliber 48mm, length 12m, derusting by sandblasting after the scrubbing, coating epoxy primer layer 2, thickness 0.06-0.1mm; Preheating has steel pipe to 150～200 ℃ of epoxy primer layer, with adhesive layer 5 and adhesive layer 5 on the aluminium foil two sides blade coating of thickness 0.2mm, wide 500mm ', the following component of this adhesive layer 5 or 5 ' contain: ethylene-vinyl acetate copolymer (commercially available product) 100 weight portions, neoprene (commercially available product) 15 weight portions, pitch (commercially available product) 70 weight portions, French chalk (commercially available product) 30 weight portions, paraffin (commercially available product) 50 weight portions, poly-isobutyl diene (commercially available product) 30 weight portions, thiodipropionate (commercially available product) 0.5 weight portion.Then on tenaplate layer 4, be adhesive layer 5 ' above the extruding and hot melting polyethylene layer, form polyethylene clad 3 through circulating water cooling back, just obtain the polyethylene coating steel pipe that has the tenaplate layer of the present utility model like this.
The utility model compared with prior art has the following advantages:
1, adopt adhesive layer of the present utility model, it and epoxy primer, aluminium foil layer, polyethylene clad all have higher adhesion strength and peeling resistance, can fully prevent splitting, and have stoped polyethylene clad cracking destruction phenomenon under external force.
2, adopt rubber coating aluminium foil layer, improved on the one hand external coating anti-medium osmosis ability, when external coating is impaired, can play cathode protecting function on the other hand.
Claims (3)
1, a kind of polyethylene that has the tenaplate layer coats steel pipe, comprise steel pipe (1), epoxy primer layer (2), polyethylene clad (3), it is characterized in that having tenaplate layer (4), tenaplate layer (4) and be wrapped in banded material on the epoxy primer layer (2) between epoxy primer layer (2) and polyethylene clad (3), tenaplate layer (4) is to be made of adhesive layer (5), aluminium foil layer (6) and adhesive layer (5 ').This adhesive layer (5) or (5 ') are to be made of ethylene-vinyl acetate copolymer 100 weight portions, neoprene 10～20 weight portions, pitch 50～100 weight portions, French chalk 20～50 weight portions, paraffin 40～60 weight portions, polyisobutylene 20～40 weight portions, thiodipropionate 0.5～1.0 weight portion.
2, a kind of polyethylene that has the tenaplate layer as claimed in claim 1 coats steel pipe, it is characterized in that steel pipe (1) caliber is 20～800mm, epoxy primer layer (2) thickness is 0.06～0.1mm, polyethylene clad (3) thickness is 2.0～3.5mm, and tenaplate layer (4) thickness is 0.3～0.5mm.
3, a kind of polyethylene that has the tenaplate layer as claimed in claim 1 or 2 coats steel pipe, it is characterized in that tenaplate layer (4) is is adhesive layer (5) and the aluminium foil layer (6) of thickness 0.18～0.20mm and adhesive layer (5 ') formation of thickness 0.06～0.15mm of 0.06～0.15mm by thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94220156 CN2200092Y (en) | 1994-08-26 | 1994-08-26 | Polyethylene clad steel pipe with rubber coating aluminium foil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94220156 CN2200092Y (en) | 1994-08-26 | 1994-08-26 | Polyethylene clad steel pipe with rubber coating aluminium foil layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200092Y true CN2200092Y (en) | 1995-06-07 |
Family
ID=33834820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94220156 Expired - Fee Related CN2200092Y (en) | 1994-08-26 | 1994-08-26 | Polyethylene clad steel pipe with rubber coating aluminium foil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200092Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691830A (en) * | 2012-06-29 | 2012-09-26 | 山东龙泉管道工程股份有限公司 | Buried prestressed steel cylinder concrete pipe having long service life and subjected to multi-layer anti-corrosion treatment |
-
1994
- 1994-08-26 CN CN 94220156 patent/CN2200092Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691830A (en) * | 2012-06-29 | 2012-09-26 | 山东龙泉管道工程股份有限公司 | Buried prestressed steel cylinder concrete pipe having long service life and subjected to multi-layer anti-corrosion treatment |
| CN102691830B (en) * | 2012-06-29 | 2014-04-30 | 山东龙泉管道工程股份有限公司 | Buried prestressed steel cylinder concrete pipe having long service life and subjected to multi-layer anti-corrosion treatment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |