A kind of anti-scratch PE composite pipe and preparation method thereof

A composite pipe, anti-scratch technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of lack of protective layer, displacement, falling off, high low temperature brittleness, etc., to prevent the melt viscosity from rising, The effect of avoiding peeling off and improving production continuity

Active Publication Date: 2019-05-24
LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the outer layer PP is brittle at low temperature, and it has obvious delamination phenomenon with the inner layer PE. During non-excavation laying, it is easy to cause displacement and falling off due to dragging, so it cannot play the role of protective layer, and it needs to be peeled off when it is connected. Layer welding, inconvenient operation

Method used

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  • A kind of anti-scratch PE composite pipe and preparation method thereof
  • A kind of anti-scratch PE composite pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The thickness of the cross-linked polyethylene protective layer 2 is 10% of the wall thickness of the homogeneous polyethylene pipe main body 1, and the cross-linked polyethylene protective layer 2 is made of the following raw material components in parts by weight:

[0036] 90 parts of cross-linked polyethylene, 0.05 parts of polydimethylsiloxane, 0.1 part of sodium carboxymethyl cellulose, 10100.1 parts of antioxidant, 0.1 part of antioxidant 168, 2 parts of linear low density polyethylene;

[0037] Its preparation method is as follows: Stir each component of the material of the cross-linked polyethylene protective layer 2 evenly according to the proportion, then add it into the extruder and adopt the reactive extrusion process, and place it outside the homogeneous polyethylene pipe main body 1 at a temperature of 140-230°C. A layer of cross-linked polyethylene protective layer 2 with a cross-linking degree of 15% is co-extruded to form a tightly composited integrated ...

Embodiment 2

[0039] The thickness of the cross-linked polyethylene protective layer 2 is 15% of the wall thickness of the homogeneous polyethylene pipe main body 1, and the cross-linked polyethylene protective layer 2 is made of the following raw material components in parts by weight:

[0040] 100 parts of cross-linked polyethylene, 0.2 parts of polydimethylsiloxane, 0.5 parts of sodium carboxymethylcellulose, 0.5 parts of antioxidant 10100, 0.1 part of antioxidant 168, 6 parts of linear low density polyethylene;

[0041] The preparation method is the same as in Example 1, and the crosslinking degree of its light crosslinking is 12%.

Embodiment 3

[0043]The thickness of the cross-linked polyethylene protective layer 2 is 12% of the wall thickness of the homogeneous polyethylene pipe main body 1, and the cross-linked polyethylene protective layer 2 is made of the following raw material components in parts by weight:

[0044] 92 parts of cross-linked polyethylene, 0.08 parts of polydimethylsiloxane

[0045] Sodium carboxymethyl cellulose 0.4 parts Antioxidant 1010 0.4 parts

[0046] Antioxidant 168 0.2 parts Linear low density polyethylene 5 parts.

[0047] The preparation method is the same as in Example 1, and the crosslinking degree of its light crosslinking is 14%.

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Abstract

The invention provides an anti-scratch PE clad pipe and a preparation method, and belongs to the field of tubing preparation technology. The clad pipe comprises a homogeneous polyethylene pipe main body which is moulded by a common polyethylene material, a layer of crosslinked polyethylene protection layer is added on the surface of the homogeneous polyethylene pipe main body, and the layer is characterized in that the thickness of the crosslinked polyethylene protection layer is 10-15% of the thickness of the homogeneous polyethylene pipe main body wall. The prepared novel anti-scratch PE clad pipe has a good composite effect, the crosslinked polyethylene protective layer and the homogeneous polyethylene pipe main body are better combined into an integrated body, so that the phenomenon of peeling and shedding of the inner pipe and the outer pipe during trenchless construction is avoided; the method has the advantages of excellent processing property, relatively low technology difficulty coefficient, and high production efficiency; the clad pipe prepared by the production technology has the advantages of high qualified rate of product, improved product quality, spatial network structure formed by the external layer crosslinked polyethylene protective layer, improved integral anti-scratch performance of the pipe, and long usage period.

Description

technical field [0001] The invention belongs to the technical field of pipe material preparation, and in particular relates to a scratch-resistant PE composite pipe and a preparation method thereof, which are widely used in non-excavation fields such as water supply, gas, sewage, mining, chemical industry, and electric power. Background technique [0002] With the rapid development of trenchless and sand-free laying, PE pipes have become the first choice for trenchless and sand-free laying due to their excellent flexibility. However, the scratches caused by human dragging during construction and the point load caused by the surrounding environment such as stones and other sharp objects against the outer surface of the pipe will form stress concentration areas and produce silver streaks, which can further grow and develop into cracks. lead to pipeline damage. Therefore, it is very important to improve the anti-scratch performance of the outer surface of the pipeline, so as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L83/04C08L23/08C08L1/28C08K5/134C08K5/526F16L9/12B29C48/92
CPCB29C48/92B29C2948/92514B29C2948/9259B29C2948/92704C08L23/06C08L2203/18C08L2205/035C08L2312/00F16L9/12C08L83/04C08L23/0815C08L1/286C08K5/1345C08K5/526
Inventor 陆国强周淑楠胡正华
Owner LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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