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Atactic copolymerized polypropylene aluminium composite pipe and its manufacture

An aluminum-plastic composite pipe, random copolymerization technology, applied in chemical instruments and methods, pipes, rigid pipes, etc., can solve problems such as unreported, restricted, leakage at joints, etc., and achieve great social and economic benefits, Simple manufacturing process, easy to produce effects

Inactive Publication Date: 2003-04-02
金德铝塑复合管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aluminum-plastic composite pipes are usually polyethylene-aluminum-plastic composite pipes, and pipes are connected by pipe fittings. The leakage problem at the joint is always the biggest problem in the application of aluminum-plastic composite pipes. In order to prevent leakage, various structures have appeared. pipe fitting design, but the leakage problem has not been able to fundamentally solve
Ordinary random copolymerized polypropylene PP-R pipes have good anti-corrosion properties and can be hot-melt connected, but due to their low strength, they are also limited in some places that require both strength and complicated environmental media. Applications
Generally speaking, aluminum-plastic composite pipes have the advantages of both plastic pipes and metal pipes, but aluminum-plastic composite pipes containing random copolymerized polypropylene have not been reported so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) The total weight of the inner and outer plastic layer materials is 100Kg,

[0015] Polypropylene 71.7Kg, polyethylene 28.3Kg.

[0016] Outer random copolymerization polypropylene 71.7Kg (PP-R Borealis).

[0017] Inner polyethylene: 28.3Kg (MDPE 2344E Dao Chemical).

[0018] Add the above-mentioned polyethylene raw material and polypropylene raw material at 28.3Kg and 71.7Kg respectively into the hopper of the inner and outer layer extruder of the aluminum-plastic pipe production line, and the processing temperature is between 190-240°C.

[0019] 2) The total weight of the adhesive layer is 12.5Kg

[0020] Outer layer acrylic modified polypropylene hot melt adhesive: 6.4Kg (LE500T Korea SK Company).

[0021] Inner layer maleic anhydride modified polyethylene hot melt adhesive: 6.1Kg (LE500T Korea SK).

[0022] The outer adhesive layer uses acrylic modified polypropylene hot-melt adhesive as the adhesive, and the weight is 6.4Kg and is added to the outer layer ad...

Embodiment 2

[0027] 1) The total weight of the inner and outer plastic layer materials is 100kg

[0028] Outer random copolymerized polypropylene (PP-R) 67.9Kg (Jilin Bohai Rubber & Plastic).

[0029] Inner polyethylene 32.1Kg (HDPE 6100M Qilu Petrochemical).

[0030] Add 32.1Kg of the above-mentioned polyethylene and 67.9Kg of polypropylene (PP-R) raw materials into the hopper of the inner and outer layer extruder of the aluminum-plastic pipe production line, and process at a temperature between 190-240°C.

[0031] 2) The total weight of the inner and outer adhesive layers is 8.6Kg.

[0032] Acrylic modified polypropylene hot melt adhesive for the outer layer: 4.6Kg (JBH-101H Bohai Rubber & Plastic).

[0033] Inner layer maleic anhydride modified polyethylene hot melt adhesive: 4.0Kg (Jilin Bohai Rubber & Plastic).

[0034] Add the above-mentioned hot melt adhesives into the inner and outer layer adhesive extruders at 4.0Kg and 4.6Kg respectively, and the processing temperature is ...

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Abstract

A composite atactic copolypropylene-aluminium pipe is composed of internal plastic layer (polyethylene), internal adhesive layer (maleic acid) anhydride grafted polyethylene as thermosol), aluminium layer, external adhesive layer (acrylic acid or maleic acid, anhydride modified polypropylene as thermosol), and external plastic layer (atactic or block copolypropylene plastics). Its advantages are simple proparing process, high strength and hot fusible joint.

Description

Technical field: [0001] The invention relates to an aluminum-plastic composite pipe, and in particular provides a random copolymerized polypropylene aluminum-plastic composite pipe and a preparation method thereof. Background technique: [0002] Aluminum-plastic composite pipes are widely used in construction, petrochemical and many other fields due to the advantages of both the corrosion resistance of plastic pipes and the high strength of metal pipes. At present, aluminum-plastic composite pipes are usually polyethylene-aluminum-plastic composite pipes, and pipes are connected by pipe fittings. The leakage problem at the joint is always the biggest problem in the application of aluminum-plastic composite pipes. In order to prevent leakage, various structures have appeared. Pipe fitting design, but the leakage problem has not been able to fundamentally solve. Ordinary random copolymerized polypropylene PP-R pipe has good anti-corrosion performance and can be hot-melt conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08B32B15/08F16L9/147
Inventor 梁洪群薄文海陈敏聂连秀
Owner 金德铝塑复合管有限公司