Polyethylene composition used for geomembrane

A technology of polyethylene and composition, which is applied in the field of polyethylene composition for geomembrane, which can solve the problems of product quality and safety hazards, stress cracking of geomembrane, and the failure of normal batch production by downstream production enterprises, and achieve excellent stress cracking resistance. And anti-aging performance, the effect of meeting the requirements of production and use
CN109575408AInactive Publication Date: 2019-04-05SINOPEC YANGZI PETROCHEM +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOPEC YANGZI PETROCHEM
Publication Date
2019-04-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a polyethylene composition used for a geomembrane. The composition includes, by mass, the following components: 70-90 parts of high-density polyethylene resin, 10-30 parts of linear low-density polyethylene resin, 0.1-0.4 part of a main antioxidant, 0.1-0.4 part of an auxiliary antioxidant, and 0.1-0.2 part of a lubricant. The polyethylene composition used for the geomembrane of the invention has excellent performance of stress cracking resistance and aging resistance, stress cracking under tensile load (NCTL) time is more than 2000 h, the oxidation induction time is more than 100 minutes, and production and use requirements of downstream users can be satisfied well.
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Description

technical field

[0001] The invention belongs to the field of polymer material science and technology, in particular to a polyethylene composition for geomembrane. Background technique

[0002] Geomembrane is a membrane-like material with extremely low permeability used in civil engineering for waterproofing. Its water vapor permeability coefficient is less than 1×10-13g cm / (cm 2 s Pa), compared with traditional waterproof materials, geomembrane has the advantages of low permeability coefficient, good low temperature flexibility, strong deformation adaptability, light weight, high strength, good overall connectivity, and convenient construction. Therefore, it can not only meet the requirements of water and soil engineering, but also can be used in roof leakage prevention, landscaping, soil conservation of river embankment slopes, seepage prevention and soil and water conservation of farmland canals, reclamation of tidal flats, landfills in environmental engineering, and thre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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