Polyethylene composition for drip irrigation pipe/belt

A technology for polyethylene and drip irrigation pipes, applied in the field of polymer materials, can solve the problems of low processing speed, insufficient quality stability, insufficient strength of drip irrigation belts, etc., and achieve extended service life, excellent processing performance, high mechanical strength and tensile strength. Pulling effect

Active Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the component kind that this invention adopts is many, and quality stability is not enough, and processing speed is low, and preparation drip irrigation tape intensity is also insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0025] The proportioning components of the polyethylene resin composition used for drip irrigation (pipe) belts are shown in Table 1.

[0026] Density is tested according to GB / T 1033.2-2010, using method D, tested after boiling for 30 minutes; melt mass flow rate (MFR) is tested according to GB / T 3682-2000, with a load of 21.6kg; molecular weight and its distribution are tested using gel Permeation chromatography (GPC) method, two chromatographic columns are connected in series, the solvent and mobile phase are both 1,2,4-trichlorobenzene (containing 0.1% antioxidant 2,6‐dibutyl p-cresol), column temperature 150°C, dissolve for 4 hours, flow rate 1.0ml / min, use narrow distribution polystyrene standard sample for universal calibration.

[0027] Table 1 Example 1 ~ 5 drip irrigation (pipe) belt polyethylene resin composition (by weight)

[0028] .

[0029] Polyethylene resin A is a copolymer of ethylene and 1-hexene, which is produced by a gas phase process and a chromium c...

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Abstract

A polyethylene composition for drip irrigation pipes / belts belongs to the field of polymer materials. It is characterized in that it is made of the following components by weight: polyethylene resin A75~85 parts, polyethylene resin B15~25 parts, antioxidant 0.3~0.6 parts, carbon black masterbatch 4~5 parts, carbon black concentration 45%~50%; polyethylene resin A is a copolymer of ethylene and 1-hexene, with a density of 0.941~0.948g / cm 3 ; Melt mass flow rate is 10.7~13.8g / 10min, weight average molecular weight is 18.9×10 4 ~20.5×10 4 , molecular weight distribution 18.7 ~ 20.0; described polyethylene resin B is the copolymer of ethylene and 1-butene, density is 0.944 ~ 0.950g / cm 3 ;Melt mass flow rate is 51~56g / 10min, weight average molecular weight is 11.1×10 4 ~12.6×10 4 , molecular weight distribution 14.8~16.0. The polyethylene composition of the invention has excellent processability and ESCR, high mechanical strength and drawing resistance.

Description

technical field [0001] A polyethylene composition for drip irrigation pipes / belts belongs to the field of polymer materials. Background technique [0002] The drip irrigation belt uses plastic pipes (drip irrigation pipes) to send water to the roots of the crops through the orifice or dripper on the capillary tube with a diameter of about 10mm for local irrigation. Evenly and slowly dripping into the soil near the roots of crops, it is the most effective water-saving irrigation method in arid and water-scarce areas at present, and the utilization rate of the drip irrigation belt application can reach 95%. [0003] Domestically, polyethylene blends of different types and different densities are mainly used to produce polyethylene compositions for drip irrigation pipes / belts with low density, which has problems such as poor stability and low strength, and it is difficult to meet the development requirements of drip irrigation pipes / belts. [0004] Chinese invention patent CN2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K3/04C08K5/134C08K5/053C08K5/526
CPCC08L23/0815C08L2203/18C08L2205/025C08K3/04C08K5/1345C08K5/053C08K5/526
Inventor 王群涛郭锐高凌雁王日辉王秀丽许平石晶
Owner CHINA PETROLEUM & CHEM CORP
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