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Aluminium plastic composite pipe and its manufacturing method

A technology of aluminum-plastic composite pipe and aluminum strip, which is applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of poor effect, poor resistance to cold and heat alternating tests, and poor compressive strength, so as to inhibit swelling , Improve low temperature resistance and cold and heat alternating performance, improve the effect of mechanical properties

Inactive Publication Date: 2006-01-25
孙经尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the disadvantages of the existing aluminum-plastic composite pipes, such as poor low-temperature working effect, poor cold and heat resistance test performance, and poor compressive strength, the present invention provides an aluminum-plastic composite pipe and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare the polymer plastic material used in the present invention and adopt high-density polyethylene, the adhesive adopts polypropylene hot-melt adhesive, adopt the aluminum strip that increases 0.2mm than common aluminum strip, and the hole on the aluminum strip is a circle Shape, plastic additives with a concentration of 5% acrylic acid solution.

[0029] The preparation process of the aluminum-plastic composite pipe includes the following steps:

[0030] a) First punch the aluminum strip according to a certain arrangement rule, then roll it into a tube shape, and weld it into a perforated aluminum tube;

[0031] b) The aluminum strip is uncoiled, spliced ​​and stored through the unwinding machine, splicing machine and storage bin;

[0032] c) The aluminum strip becomes an aluminum half pipe through the preforming mechanism installed on the welding platform;

[0033] d) The aluminum half pipe is heated to about 200°C by the heater on the welding platform, and then...

Embodiment 2

[0043] Prepare the used polymer plastic material material of the present invention and adopt polypropylene PP-R, bonding agent adopts polypropylene hot-melt glue, adopts the aluminum strip of thickening type that increases 0.1mm than common aluminum strip, and the hole on the aluminum strip is Triangle, the plastic additive uses acrylic acid solution with a concentration of 3%.

[0044] The preparation process is basically the same as above, in which step k) in the mold cavity, heat up to about 220°C, increase the pressure to 6Mpa, keep the temperature and pressure for 5 hours, and complete the copolymerization molding; The temperature was lowered to room temperature by water cooling, and stored for another 10 hours to complete the cross-linking reaction.

Embodiment 3

[0046] Prepare the used macromolecule plastic material material of the present invention and adopt polystyrene, bonding agent adopts polypropylene hot-melt adhesive, adopts the aluminum strip that increases 0.2mm thicker than common aluminum strip, and the hole on the aluminum strip is square, The ovals are arranged alternately, and the plastic additive adopts acrylic acid solution with a concentration of 8%.

[0047] The preparation process is basically the same as above, in which step k) in the mold cavity, heat up to about 210°C, increase the pressure to 6Mpa, keep the temperature and pressure for 3 hours, and complete the copolymerization molding; The temperature was lowered to room temperature by water cooling, and then stored for 6 hours to complete the crosslinking reaction.

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Abstract

The invention is an aluminum plastic composite tube and the preparing method. The said aluminum plastic composite tube contains an aluminum tape layer between high molecular plastic layers and such the characters of arranging a plurality of holes on the aluminum tape, containing a hot melt glue adhesive layer between the high molecular plastic layer and the aluminum tape layer, and adding additive crylic acid to the molecular plastics. The preparing method has the characters: firstly holing the aluminum tape, heating and determining the diameter and aligning the welding line and then welding into a tube; then fully mixing high molecular plastics, crylic acid and fillings, heating and extruding the high molecular plastic polymer to make inner plastic tube and outer plastic tube; feeding the inner and outer plastic tubes together with the holed aluminum tube uniformly coated with polypropylene hot melt glue into the die cavity of an extrusion head; heating to raise temperature and pressure, and then completing the copolymerization reaction at constant temperature and pressure. The invention improves the strength, low-temperature resisting performance, and cold-hot resistant alternative performance of the tubing by changing the structural form of the composite, able to better prohibit the swelling caused by hydrocarbon oil soaking.

Description

technical field [0001] The invention belongs to the field of aluminum-plastic composite materials, and in particular relates to an aluminum-plastic composite pipe and a preparation method thereof. The invention can replace existing steel pipes, copper pipes, nylon pipes and rubber pipes, and is suitable for use under severe environmental conditions. Background technique [0002] Aluminum-plastic composite pipe has excellent performance and a wide range of applications. However, most of the existing ordinary aluminum-plastic composite pipes are composed of plastic-aluminum strip-plastic, and the middle interface is coated with hot sol, which is co-extruded by an extruder and compounded. The test performance is poor, and swelling will occur when hydrocarbon oil is transported for a long time, which limits the application of aluminum-plastic composite pipes in the automotive and engineering fields. [0003] Chinese patent (publication No. CN2612859, patent No. ZL03230313.0) d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147
Inventor 孙经尧
Owner 孙经尧
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