CN201351772Y - Aluminum-plastic composite pipe - Google Patents

Aluminum-plastic composite pipe Download PDF

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Publication number
CN201351772Y
CN201351772Y CNU2008202040874U CN200820204087U CN201351772Y CN 201351772 Y CN201351772 Y CN 201351772Y CN U2008202040874 U CNU2008202040874 U CN U2008202040874U CN 200820204087 U CN200820204087 U CN 200820204087U CN 201351772 Y CN201351772 Y CN 201351772Y
Authority
CN
China
Prior art keywords
polyethylene
pipe
plastic composite
aluminum
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2008202040874U
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Chinese (zh)
Inventor
寿伟春
陈宁
刘哲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHUHAI HANSEN TECHNOLOGY Co Ltd
Original Assignee
ZHUHAI HANSEN TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CNU2008202040874U priority Critical patent/CN201351772Y/en
Application granted granted Critical
Publication of CN201351772Y publication Critical patent/CN201351772Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an aluminum-plastic composite pipe, belonging to the field of pipe materials. The aluminum-plastic composite pipe sequentially comprises an inner polyethylene layer, a hot melt adhesive layer, an aluminum pipe, a hot melt adhesive layer and an outer polyethylene layer from the inside to the outside. The utility model is characterized in that the inner polyethylene layer is made of middle-density polyethylene. The specific gravity of the middle-density polyethylene is more than 0.93g/m<3> and less than 0.95 g/m<3>. Since the outer layer of the aluminum-plastic composite pipe adopts the middle-density polyethylene which has a unique structure with a polyethylene main chain and a plurality of octylene short branch chains, therefore, the pipe has the advantages of good toughness, good tensile strength, good low-temperature impact resistance, good long-term pressure resistance of the polyethylene and good thermal creep resistance of the octylene. The aluminum-plastic composite pipe is provided with the creep rupture curve compliant with the product standard and is the only product which can be used as a hot water pipe without requiring cross bonding at present. The pipe can be widely used in fields such as floor heating, potable water piping system, cold and hot water supply system and the like.

Description

Aluminium-plastic composite pipe
Technical field
The utility model relates to the tubing field, relates in particular to a kind of aluminium-plastic composite pipe.
Background technique
Aluminium-plastic composite pipe is the external novel tube of the developing eighties in 20th century, it be with polyethylene, polyethylene hot melt adhesive special and alloy foil by high temperature, high pressure extruding and moulding and the five-layer structure composite pipe that is combined into one, outermost surface and nexine are that (proportion is greater than 0.95g/m for high density polyethylene (HDPE) 3), the second layer is a hot melt adhesive, and the 3rd layer is aluminum pipe, and the 4th layer also is one deck hot melt adhesive, and according to the related standards regulation, no matter cold water still is the hot water aluminium-plastic composite pipe with aluminium-plastic composite pipe, and inside and outside layer raw material all wanted identical unanimity.Now the inside and outside layer of the aluminium-plastic composite pipe of Sheng Chaning adopts high density polyethylene (HDPE) usually, because double bond content is more in the high density polyethylene (HDPE), and the hydrogen atom on the alpha-carbon atom on two keys side is than the easier oxidation of the hydrogen atom on the tertiary carbon atom, therefore the ageing resistance of high density polyethylene (HDPE) is relatively poor, aging speed is faster under High Temperature High Pressure, and the high density polyethylene (HDPE) intermolecular force is less, thereby easily slides mutually between macromolecular chain, still can carry out deformation slowly at little mechanical stress effect polyethylene.
The model utility content
The purpose of this utility model provides that a kind of mechanical property is good, the aluminium-plastic composite pipe of long service life.
For achieving the above object, provide following technological scheme:
Aluminium-plastic composite pipe, it comprises inner layer polyethylene, hot melt adhesive, aluminum pipe, hot melt adhesive and outer layer polyethylene from inside to outside successively, it is characterized in that described outer layer polyethylene is a medium density polyethylene, the proportion of described medium density polyethylene is greater than 0.93g/m3 and less than 0.95g/m3.
After the plastic-aluminum combined outer tube layer of the utility model adopts medium density polyethylene (PE-RT), its peculiar ethene main chain and octene short-chain branch structure make it to have the ethene superior toughness simultaneously, the cracking performance of anti-pulling force the, low-temperature impact resistance, outstanding long-term pressure resistance energy and the heat-resisting croop property of octene.Have the creep rupture curve that meets product standard, be in the polyethylene present stage uniquely do not need a crosslinked kind that just can be used for hot-water line.Can be widely used in fields such as floor heating, drinking water pipeline system, hot and cold water water supply system.
The PE-RT raw material not only has the broken varied curve of qualified creep, and its tubing moderate cost, other kind is convenient, fast relatively in construction, Connecting format belongs to the form that the molten mutually hot melt in the most reliable one's own department or unit of present stage connects, the aperture at pipe fitting position is greater than the internal diameter of same size tubing, in system because there is not the mechanical connection manner of local undergauge, so the system fluid resistance is less relatively.In addition, the PE-RT processibility is stable, and there are problems such as the control degree of cross linking and the crosslinked uniformity in PE, and processed complex and processing directly influence pipe performance.And PE-RT processing is easy, and pipe performance is decided by raw material basically, and performance is more stable.
Description of drawings
Fig. 1 is the sectional view of the utility model aluminium-plastic composite pipe.
Introduce aluminium-plastic composite pipe of the present utility model in detail below in conjunction with instantiation.
Embodiment
Embodiment one
Referring to Fig. 1, be the utility model aluminium-plastic composite pipe sectional view.A kind of novel aluminum-plastic composite pipe, it comprises internal layer medium density polyethylene 1, hot melt adhesive 2, aluminum pipe 3, hot melt adhesive 4 and outer medium density polyethylene 5 from inside to outside successively.Medium density polyethylene is the special-purpose material of a kind of novel heating, and stable mechanical property is formed through the metallocene catalysis copolymerization by the monomer of ethene and octene.The weight ratio of each of above-mentioned aluminium-plastic composite pipe layer is different and different according to the kind of aluminium-plastic composite pipe, and be example with butt joint type aluminium-plastic composite pipe 1216 specifications: polyethylene, hot melt adhesive, aluminum pipe, hot melt adhesive, polyethylene weight ratio are: 45: 5: 60: 2.5: 25.
Aluminium-plastic composite pipe of the present utility model has changed the internal and external layer material of existing aluminium-plastic composite pipe, substitute former high density polyethylene (HDPE) with medium density polyethylene (PE-RT), the embrittlement temperature of medium density polyethylene is low, has excellent resistance to low temperature, therefore also can construct under the situation in the winter time warmly, and when crooked pipeline, need not preheating, be convenient to constructing operation.Simultaneously, medium density polyethylene has good pliability, can reduce construction cost by coiling and crooked method in warm ground work progress.In addition, the medium density polyethylene pipe can adopt the hot melt Placement to connect, and suffers that accidental damage also can connect reparation with the pipe fitting hot melt, and the joint does not have joint, can improve quality of connection greatly, reduces Accident due to quality.And medium density polyethylene is at present uniquely not need crosslinkedly, just can present the material of excellent long-term hydrostatic performance under High Temperature High Pressure, is 70 ℃ in operating temperature, and pressure is under the condition of 0.8MPa, and medium density polyethylene can be used safely more than 50 years.
Embodiment two
Except the internal and external layer polyethylene is all adopted the medium density polyethylene described in the above-mentioned enforcement one, also inner layer polyethylene still can be adopted traditional high density polyethylene (HDPE), outer layer polyethylene then adopts medium density polyethylene, because the physical property of outer layer polyethylene is bigger to the performance impact of whole aluminium-plastic composite pipe.
Above example is the unrestricted the technical solution of the utility model in order to explanation only.Any modification or partial replacement that does not break away from the utility model spirit and scope all should be encompassed in the middle of the claim scope of the present utility model.

Claims (2)

1, aluminium-plastic composite pipe, it comprises inner layer polyethylene, hot melt adhesive, aluminum pipe, hot melt adhesive and outer layer polyethylene from inside to outside successively, it is characterized in that, and described outer layer polyethylene is a medium density polyethylene, and the proportion of described medium density polyethylene is greater than 0.93g/m 3And less than 0.95g/m 3
2, aluminium-plastic composite pipe according to claim 1 is characterized in that, described inner layer polyethylene is a medium density polyethylene.
CNU2008202040874U 2008-11-26 2008-11-26 Aluminum-plastic composite pipe Expired - Fee Related CN201351772Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008202040874U CN201351772Y (en) 2008-11-26 2008-11-26 Aluminum-plastic composite pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008202040874U CN201351772Y (en) 2008-11-26 2008-11-26 Aluminum-plastic composite pipe

Publications (1)

Publication Number Publication Date
CN201351772Y true CN201351772Y (en) 2009-11-25

Family

ID=41375159

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008202040874U Expired - Fee Related CN201351772Y (en) 2008-11-26 2008-11-26 Aluminum-plastic composite pipe

Country Status (1)

Country Link
CN (1) CN201351772Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561698A (en) * 2012-03-22 2012-07-11 江油贝得力金属新材料有限公司 High polymer and bainite composite elbow pipe for pump truck
CN103195986A (en) * 2013-03-29 2013-07-10 新兴铸管股份有限公司 Composite steel-plastic pressure pipe for conveying hot water

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561698A (en) * 2012-03-22 2012-07-11 江油贝得力金属新材料有限公司 High polymer and bainite composite elbow pipe for pump truck
CN102561698B (en) * 2012-03-22 2015-01-07 四川贝氏新材料有限公司 High polymer and bainite composite elbow pipe for pump truck
CN103195986A (en) * 2013-03-29 2013-07-10 新兴铸管股份有限公司 Composite steel-plastic pressure pipe for conveying hot water

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091125

Termination date: 20151126