Corrosion-protecting steel pipeline polypropylene jacket material with three-layer sandwich and preparing method

A three-layer structure, polypropylene technology, applied in the direction of pipeline protection, pipeline damage/abrasion prevention, coating, etc., can solve the problems of reducing anti-corrosion pipelines, poor toughness, etc., and achieve good impact strength, surface stiffness and scratch resistance Good properties, excellent moisture absorption effect

Inactive Publication Date: 2011-04-20
SHANGHAI HILONG SHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a three-layer structure anti-corrosion steel pipe polypropylene jacket material and its preparation method, which mainly solves the technical problems in the above-mentioned prior art, and it overcomes the poor toughness of traditional PP materials, especially the toughness at low temperature Poor problem, the service environment temperature can reach above 90 degrees, and it greatly reduces the phenomenon that the anti-corrosion pipeline conveying high medium is scratched when it passes underground

Method used

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Experimental program
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Effect test

preparation example Construction

[0034] The preparation method of the above-mentioned three-layer structure anticorrosion steel pipeline polypropylene jacket material comprises the following steps:

[0035] The first step: add the raw materials into the mixing tank according to the ratio as claimed in claim 1, set the stirring speed at 600-900 rpm, and stir for 2 minutes;

[0036] Step 2: Put the mixed raw materials into the twin-screw extruder for mixing and plasticizing;

[0037] The third step: the strips are water-cooled;

[0038] The fourth step: air-dried and diced;

[0039] Step 5: Shock packaging.

[0040] The heating temperature in each district of the twin-screw extruder in the second step is as follows:

[0041] zone 1

Zone 2

Zone 3

District 4

District 5

District 6

District 7

District 8

District 9

170℃

170℃

180℃

180℃

225℃

225℃

235℃

235℃

230℃

[0042] In the third step, the water temperature in the tank is controlled a...

Embodiment 1

[0045] The coating includes the following components and weight percentages: polypropylene (K8302) 50%, polypropylene (B8102) 40%, functional masterbatch 3%, reinforcing agent 1%,

[0046] Compatibilizer: 1%, EVA: 2%.

[0047] use

[0048] Resistance to environmental stress cracking, F50, ≥1000h

[0049] Melt flow rate meter, 2.5 ≥0.2g / 10min

[0050] Electronic tensile machine: tensile strength ≥ 20MPa; elongation at break ≥ 600%

Embodiment 2

[0052] The coating includes the following components and weight percentages: polypropylene (K8303) 51%, polypropylene (B8101) 41%, functional masterbatch 5%, reinforcing agent 2%,

[0053] Compatibilizer: 3%, EVA: 4%.

[0054] use

[0055] Environmental stress cracking resistance, F50, ≥1000h

[0056] Melt flow rate meter, 2.5 ≥0.2g / 10min

[0057] Electronic tensile machine: tensile strength ≥ 20MPa; elongation at break ≥ 600%

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Abstract

The invention relates to three-layer anti-corrosive steel pipe polypropylene jacket material which includes polypropylene, functional master batches, a strengthening agent, a compatibilizer and EVA. The material is prepared in the following steps: first, the raw materials are added into a mixing crock by the proportion in the claim 1, the mixing speed is set to be 600 to 900r / min, and the materials are mixed for 2 min; second, the mixed raw materials are added into a twin-screw extruder to be mixed and plasticized; third, a brace is cooled by water; fourth, granulates are air-dried; fifth, the product is vibrated and packaged. The three-layer anti-corrosive steel pipe polypropylene jacket material overcomes the problem of poor toughness in particular at low temperature in the traditional PP materials, has service environment temperature of above 90 DEG C, and moreover, greatly avoids the phenomenon that anti-corrosive pipes used to convey high media are scratched when moving underground.

Description

Technical field: [0001] The invention relates to the technical field of external anti-corrosion of steel pipelines, in particular to an anti-corrosion and wear-resistant paint three-layer structure anti-corrosion polypropylene jacket material for steel pipelines and a preparation method thereof. Background technique: [0002] The technical field of external anti-corrosion of steel pipelines includes: (1) anti-corrosion pipelines used to transport medium with higher temperature; (2) anti-corrosion pipelines used in desert areas with high surface temperature and long sunshine hours; (3) anti-corrosion pipelines used Underground crossing of pipelines; (4) Used as anti-corrosion pipelines near pressurization stations. [0003] In the above-mentioned technical fields, polypropylene (PP) material is mainly used at present, PP is a semi-crystalline material, which is harder and has a higher melting point than polyethylene (PE). Because the homopolymer ordinary PP temperature is ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08J3/12B29C47/40B29C47/92F16L58/10F16L57/06B29C48/40B29C48/92
CPCB29C48/92B29C48/05B29C2948/92704B29C48/04B29C48/40B29C48/9185B29C48/919B29C2948/92895B29C2948/92923
Inventor 陈卫东方军锋李志强
Owner SHANGHAI HILONG SHINE NEW MATERIAL
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