Polyethylene composite for drip irrigation pipes

A composition and polyethylene technology, applied in the fields of application, botanical equipment and methods, climate change adaptation, etc., can solve the problems of scratches or even abrasions, poor puncture resistance, etc., and achieve excellent wear resistance and puncture resistance The effect of good performance and good strength

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, due to the lack of the above performance, the drip irrigation pipe may be scratched or even worn out by the soil clods or hard objects in the soil due to the poor wear resistance and puncture resistance of the material when laying the drip irrigation pipe.

Method used

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  • Polyethylene composite for drip irrigation pipes
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] High-density polyethylene resin, 50 parts (density 0.945g / cm 3 , The melt mass flow rate is 12g / 10min, the weight average molecular weight is 260,000, the molecular weight distribution width index is 22, ESCR>1000h, produced by chromium catalyst).

[0030] High pressure polyethylene resin, 25 parts (density 0.919g / cm 3 , The melt mass flow rate is 2.0g / 10min).

[0031] Metallocene polyethylene resin, 25 parts (density 0.920g / cm 3 , The melt mass flow rate is 1.0g / 10min, the molecular weight distribution breadth index is 3.08, the weight average molecular weight is 123,500, and the comonomer mole percentage is 2.53%).

[0032] Carbon black masterbatch, 4 parts (masterbatch concentration 50%).

[0033] Antioxidant, 0.2 part of tris[2.4-di-tert-butylphenyl] phosphite, [β-(3,5-di-tert-butyl 4-hydroxy-phenyl) propionate] pentaerythritol ester, 0.15 part.

Embodiment 2

[0035] High-density polyethylene resin, 40 parts (density 0.945g / cm 3 , The melt mass flow rate is 12g / 10min, the weight average molecular weight is 260,000, the molecular weight distribution width index is 22, ESCR>1000h is produced by chromium-based catalyst).

[0036] High pressure polyethylene resin, 20 parts (density 0.915g / cm 3 , The melt mass flow rate is 2.5g / 10min).

[0037] Metallocene polyethylene resin, 20 parts (QHM22F metallocene polyethylene produced by Qilu Petrochemical Company, density 0.937g / cm 3 , The melt mass flow rate is 0.6g / 10min, the molecular weight distribution breadth index is 3.46, the weight average molecular weight is 146,000, and the molar percentage of comonomer is 0.59%).

[0038] Carbon black masterbatch, 5 parts (masterbatch concentration 40%).

[0039]Antioxidant, tris[2.4-di-tert-butylphenyl] phosphite 0.15 parts, β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, 0.15 parts, [β - Pentaerythritol (3,5-di-tert-butyl-4-hydroxy-...

Embodiment 3

[0041] High-density polyethylene resin, 50 parts (density 0.940 g / cm 3 , The melt mass flow rate is 14g / 10min, the weight average molecular weight is 180,000, the molecular weight distribution width index is 20, ESCR>1000h, produced by chromium catalyst).

[0042] High pressure polyethylene resin, 25 parts (density 0.925g / cm 3 , The melt mass flow rate is 1.5g / 10min).

[0043] Metallocene polyethylene resin, 20 parts (density 0.915g / cm 3 , Melt mass flow rate 2.0g / 10min, molecular weight distribution breadth index 2, weight average molecular weight 100,000, comonomer mole percentage 0.5%).

[0044] Carbon black masterbatch, 4 parts (masterbatch concentration 30%).

[0045] Antioxidant, 0.15 part of tris[2.4-di-tert-butylphenyl] phosphite, [β-(3,5-di-tert-butyl 4-hydroxy-phenyl) propionate] pentaerythritol ester, 0.1% part.

[0046] Fluoroelastomer, 0.3 parts.

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Abstract

The invention discloses a polyethylene composite for drip irrigation pipes, belongs to the technical field of high polymer materials, and particularly relates to a polyethylene composite. The polyethylene composite is characterized by comprising the following components in parts by weight: 40-60 parts of high-density polyethylene resin, 20-30 parts of high-pressure polyethylene resin, 10-30 parts of metallocene polyethylene resin, 0.15-1.2 parts of antioxidant, and 1.2-3 parts of carbon black. The composite, besides having good strength, flexibility, processability and aging resistance, has excellent abrasion resistance, ESCR (environmental stress cracking resistance) and puncture resistance and good high-temperature hydrostatic performance.

Description

technical field [0001] A polyethylene composition for drip irrigation pipes belongs to the technical field of polymer materials, in particular to a polyethylene composition. Background technique [0002] Due to its good comprehensive properties such as flexibility, cold resistance and processability, polyethylene is widely used in the preparation of various pipes, such as water supply pipes, gas pipes, cable sheath pipes, drainage pipes, agricultural pipes, etc. Drip irrigation pipe (belt) is a kind of agricultural pipe, and it is developing very fast in our country at present. It is required that the raw materials for the preparation of drip irrigation pipes not only have high strength, but also have good flexibility, cold resistance, hydrostatic resistance, environmental stress cracking resistance (ESCR) performance, light aging resistance and heat resistance, etc., and have good performance in the production of pipes. Excellent processing performance, meeting the require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L27/12C08K3/04C08K5/524C08K5/134A01G25/02
CPCC08L23/06C08L2201/08C08L2203/18C08L2205/025C08L2205/03C08L2205/035C08L2207/062C08L2207/066C08L23/0815C08K3/04C08K5/526C08K5/1345C08L27/12Y02A40/22
Inventor 唐岩李延亮黄峰陈智能陈华赉王晓蕾
Owner CHINA PETROLEUM & CHEM CORP
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