CN1259185C - Automative fuel pipeline made by co-injection process - Google Patents
Automative fuel pipeline made by co-injection process Download PDFInfo
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- CN1259185C CN1259185C CN 01137610 CN01137610A CN1259185C CN 1259185 C CN1259185 C CN 1259185C CN 01137610 CN01137610 CN 01137610 CN 01137610 A CN01137610 A CN 01137610A CN 1259185 C CN1259185 C CN 1259185C
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- polyamide
- intermediate layer
- wall thickness
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- internal layer
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Abstract
The present invention relates to an automobile pipeline which uses oil fuel, etc. manufactured by extrusion. The present invention is provided with an outer layer (1) formed by polyamide 12, a middle layer (2) formed by ethene-vinyl alcohol copolymer and an inner layer (3) formed by polyamide 6, wherein the polyamide of the inner layer (3) is polyamide 6 or polyamide 12 which can conduct by adding conductive black carbon or graphite fibers with the weight percent of 30% at most.
Description
Technical field
The present invention relates to automobile pipeline such as oil plant of making by coextrusion, it has the skin that is made of polyamide 12, the intermediate layer that is made of ethylene-vinyl alcohol copolymer and the internal layer that is made of polyamide such as polyamide 6.
Background technology
DE4001125C1 discloses this automobile pipeline, and wherein barrier layer is permeated as hydrocarbon in the intermediate layer, and inner tube layer does not allow static on the area by the fluid that flows through.In addition, the not ability zinc chloride corrosion of its internal layer so just can not be used the connector that contains zinc, and this is because because quick aging such as stress corrosion make pipeline may occur damaging.
Following content is disclosed in the 1110th page the-the 1113rd page of Roempp chemistry encyclopaedia dictionary second volume published of Georg Thieme publishing house of nineteen ninety the 9th edition Stuttgart, promptly under the natural stability state, will sneak in the non-conductive polymer in conductive additive such as carbon black or the carbon fiber-containing and make it have electric conductivity.Yet, the always too crisp and extensibility difference of this conducting polymer and can not satisfy above-mentioned instructions for use.
Summary of the invention
The automobile pipeline that the purpose of this invention is to provide a kind of the above-mentioned type, it has the internal layer of zinc chloride corrosion conduction and preferably also anti-.
For this reason, the present invention proposes a kind of automobile pipeline of the usefulness of making by coextrusion such as oil plant, it has the skin that is made of polyamide 12, the intermediate layer that is made of ethylene-vinyl alcohol copolymer and the internal layer that is made of polyamide 12, it is characterized in that: the polyamide 12 of internal layer is mostly to be 30% conductive carbon black or graphite fibre most and to make its conductive polyamide 12 by adding percentage by weight; Between skin and the intermediate layer and between intermediate layer and internal layer, establish a bonding coating respectively, bonding coating comprises the polyolefin with functional group; The wall thickness in zone is 30% to 60% of total wall thickness outside the intermediate layer, the wall thickness in intermediate layer be total wall thickness 5% to 25%, the wall thickness in zone is 25% to 55% of total wall thickness within the intermediate layer.
Solution of the present invention is, in the polyamide 6 of internal layer, add percentage by weight and mostly be the carbon black or the graphite fibre of 30% conduction most, so that it can conduct electricity and the corrosion of anti-zinc chloride, or the polyamide of internal layer is to make its conductive polyamide 12 by adding carbon black or the graphite fibre that percentage by weight mostly is 30% conduction most.
, the present invention is based on following understanding here, promptly in polyamide 6, add percentage by weight and mostly be the carbon black of 30% conduction or graphite fibre most satisfying the instructions for use of conduction and the corrosion of also anti-to a certain extent zinc chloride, and can not influence its ductility.If to having relatively high expectations of anti-zinc chloride corrosion, then suggestion adds other corresponding additive.Correspondingly, also be suitable for polyamide 12, it has certain anti-zinc chloride corrosivity under nature.
According to preferred embodiment, between the outer and intermediate layer that constitutes by ethylene-vinyl alcohol copolymer and/or the intermediate layer and internal layer that constitute by ethylene-vinyl alcohol copolymer, add by polyamide 6, mostly be the carbon black of 30% conduction or the extra play that graphite fibre constitutes its conductive polyamide 6 or polyamide 6-compound most by adding percentage by weight.In addition,, can advise adopting such setting, promptly between outer and contiguous intermediate layer or extra play and/or internal layer and contiguous intermediate layer or extra play, bonding coating is set respectively for the relatively poor polymer of being attached to each other property.The bonding coating that is fit to comprises the polyolefin with functional group, particularly based on the polyolefin of polyethylene or polypropylene.When polyamide 12 is used as internal layer, between internal layer and outer bonding coating thereof, added the extra play of forming by nonconducting polyamide 12.
Total wall thickness of automobile pipeline is 0.8-2.0mm.Automobile pipeline of the present invention is characterised in that: the wall thickness in zone is the 30%-60% of total wall thickness outside the intermediate layer, and the wall thickness in intermediate layer is that the wall thickness in zone within the 5%-25%, intermediate layer of total wall thickness is the 25%-55% of total wall thickness.
Description of drawings
Below, further describe the present invention with reference to accompanying drawing.Fig. 1-Fig. 5 shows the schematic cross-sectional view that the oil plant of making by coextrusion of the present invention is used four embodiment of automobile pipeline.
The specific embodiment
In all four embodiment, the automobile pipeline have the skin 1 that constitutes by polyamide 12 (PA12), constitute by ethylene-vinyl ferment copolymer (EVAL) and as the intermediate layer 2 of hydrocarbon infiltration barrier layer and the internal layer 3 that constitutes by polyamide, and in Fig. 1-Fig. 3 by polyamide 6 (PA6
*) make with Fig. 4,5 in by polyamide 12 (PA12
*) make, wherein add percentage by weight and mostly be 30% conductive carbon black or graphite fibre most, also can anti-zinc chloride corrosion thereby it can be conducted electricity.
According to the embodiment of Fig. 1, outer 1 and intermediate layer 2 between, add from outside to inside bonding coating (HV) 4 and by with inner layer material identical materials (PA6
*) extra play 5 that constitutes.In the embodiment of Fig. 2, between skin 1 and intermediate layer 2 and between intermediate layer 2 and internal layer 3, add the extra play 5 that constitutes by polyamide 6-compound (PA6C).In the embodiments of figure 3, between skin 1 and intermediate layer 2, the extra play 5 that adds bonding coating (HV) 4 from outside to inside and be made of polyamide 6 in addition, is provided with the extra play 5 of another polyamide 6 between intermediate layer 2 and internal layer 3.At last, in the embodiment of Fig. 4, outer 1 and intermediate layer 2 between and between intermediate layer 2 and internal layer 3, connect bonding coating 4 respectively.The formation of the automobile pipeline among Fig. 5 and the difference of Fig. 4 be, between internal layer 3 and outer bonding coating thereof, adds nonconducting polyamide 12 extra plays 6.
The thickness of each layer is provided by following table:
| Fig. 1 | Fig. 2 | Fig. 3 | Fig. 4 | Fig. 5 |
| 0.3mm PA12 | 0.3mm PA12 | 0.3mm PA12 | 0.40mm PA12 | 0.35mm PA12 |
| 0.05mm HV | 0.05mm HV | 0.05mm HV | 0.05mm HV | |
| 0.05mm PA6 * | 0.10mm PA6C | 0.05mm PA6 | ||
| 0.15mm EVAL | 0.15mm EAVL | 0.15mm EAVL | 0.15mm EAVL | 0.15mm EAVL |
| 0.35mm PA6C | 0.35mm PA6 | 0.30mm HV | 0.05mm HV | |
| 0.30mm PA12 | ||||
| 0.45mm PA6 * | 0.10mm PA6 * | 0.10mm PA6 * | 0.10mm PA12 * | 0.10mm PA12 * |
Claims (4)
1. automobile pipeline that the oil plant of making by coextrusion is used, it has the skin (1) that is made of polyamide 12, the intermediate layer (2) that is made of ethylene-vinyl alcohol copolymer and the internal layer (3) that is made of polyamide 12, it is characterized in that: the polyamide 12 of internal layer (3) is mostly to be 30% conductive carbon black or graphite fibre most and to make its conductive polyamide 12 by adding percentage by weight; Between outer (1) and intermediate layer (2) and between intermediate layer and internal layer (3), establish a bonding coating (4) respectively, bonding coating (4) comprises the polyolefin with functional group; The wall thickness in zone is 30% to 60% of total wall thickness outside the intermediate layer (2), the wall thickness of intermediate layer (2) be total wall thickness 5% to 25%, the wall thickness in zone is 25% to 55% of total wall thickness within intermediate layer (2).
2. automobile pipeline as claimed in claim 1 is characterized in that: between internal layer (3) and outer bonding coating (4), add the extra play of being made up of nonconducting polyamide 12 (6).
3. automobile pipeline as claimed in claim 1 is characterized in that: described polyolefin comprises polyethylene or polypropylene as base material ground.
4. automobile pipeline as claimed in claim 1 is characterized in that: total wall thickness is 0.8mm-2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01137610 CN1259185C (en) | 2001-09-06 | 2001-09-06 | Automative fuel pipeline made by co-injection process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01137610 CN1259185C (en) | 2001-09-06 | 2001-09-06 | Automative fuel pipeline made by co-injection process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1406739A CN1406739A (en) | 2003-04-02 |
| CN1259185C true CN1259185C (en) | 2006-06-14 |
Family
ID=4674233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01137610 Expired - Lifetime CN1259185C (en) | 2001-09-06 | 2001-09-06 | Automative fuel pipeline made by co-injection process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259185C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107073867A (en) * | 2014-09-12 | 2017-08-18 | 宇部兴产株式会社 | Stacking pipe |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4489558B2 (en) * | 2004-10-25 | 2010-06-23 | 三桜工業株式会社 | Multi-layer resin tube |
| DE102005031491A1 (en) * | 2005-07-04 | 2007-01-11 | Degussa Ag | Use of a polyamide molding composition having high melt stiffness for coextrusion with a refractory polymer |
| CN103038058B (en) * | 2011-02-25 | 2015-04-01 | 住友理工株式会社 | Fuel inlet pipe made of resin, and method for producing same |
| EP2772354B1 (en) * | 2013-03-01 | 2018-12-05 | TI Automotive (Fuldabrück) GmbH | Multilayer fuel pipe |
| CN103590950B (en) * | 2013-10-31 | 2015-11-11 | 柯礼军 | A kind of high pressure common rail injection oil tube |
| CN103615343A (en) * | 2013-11-26 | 2014-03-05 | 宁波诗兰姆汽车零部件有限公司 | High pressure common rail injection oil tube |
| CN109177720A (en) * | 2018-10-30 | 2019-01-11 | 安徽江淮汽车集团股份有限公司 | A kind of ORVR plastics oiling pipe assembly |
| EP3875263A1 (en) * | 2020-03-06 | 2021-09-08 | TI Automotive (Fuldabrück) GmbH | Tube construct |
-
2001
- 2001-09-06 CN CN 01137610 patent/CN1259185C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107073867A (en) * | 2014-09-12 | 2017-08-18 | 宇部兴产株式会社 | Stacking pipe |
| CN107073867B (en) * | 2014-09-12 | 2019-08-16 | 宇部兴产株式会社 | Stacking pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1406739A (en) | 2003-04-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20060614 |