Smooth-surface geomembrane and preparation method thereof

A technology of geomembrane and smooth surface, which is applied in the field of smooth geomembrane and its preparation, can solve the problems of being unable to meet multiple environments, multiple changes, resistance to environmental stress cracking, and single formula, and achieve excellent resistance to environmental stress cracking and mechanical properties The effect of balance and flexibility can be highlighted

Inactive Publication Date: 2013-06-05
JIANGSU JINBA ENVIRONMENT TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] The raw material of traditional smooth geomembrane is HDPE (high-density polyethylene) plus carbon black masterbatch, and due to the single formula, the performance of geomembrane cannot meet the requirements of multi-environment and change when it is used, especially if it is not Projects with large uniform settlement or local settlement, and projects with serious pollution sources, such as mine heap leaching sites, landfill closures, and other projects that require high material mechanical properties, flexibility, and stress cracking properties
The flexibility, environmental stress cracking resistance, and balanced performance of traditional smooth geomembranes cannot be used in these environments with complex or variable shapes and meet the standards
There are also LLDPE (linear low-density polyethylene, many of which are copolymerized with butene) and carbon black masterbatch. This kind of product has outstanding flexibility, but its mechanical properties are low, and its overall performance is not ideal. Facilitate laying and welding construction

Method used

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  • Smooth-surface geomembrane and preparation method thereof
  • Smooth-surface geomembrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] (1) According to the following formula: the raw material is composed of 100 parts of MDPE and 8 parts of LLDPE; then add the carbon black of 5.4% of the weight of the raw material, the antioxidant of 0.3% of the weight of the raw material, and the light stabilizer of 0.2% of the weight of the raw material. MDPE has a bimodal distribution of molecular weight, butene copolymerization, a comonomer content of about 3%, and a density of 0.936g / cm 3 ~0.938g / cm 3 , Medium density polyethylene with a melt flow rate MFR of 0.1-0.2g / 10min (190°C, 2.16kg). LLDPE is octene copolymer, density 0.920g / cm 3 ~0.925g / cm 3 , Linear low density polyethylene with a melt flow rate MFR of 0.8-1.0g / 10min (190°C, 2.16kg). Carbon black is nano-scale particle size (20-25nm), concentration 45-48%, carrier uses LDPE, density 1.20g / cm 3 ~1.25g / cm 3 , Melt flow rate MFR of 2.0 ~ 2.5g / 10min (190 ℃, 2.16kg) medium pigment carbon black masterbatch, as a UV shielding agent. The antioxidant is 2,6-t...

Embodiment 2

[0031] (1) According to the following formula: the raw material is composed of 100 parts of MDPE and 10 parts of LLDPE; then add the carbon black of 5.4% of the weight of the raw material, the antioxidant of 0.3% of the weight of the raw material, and the light stabilizer of 0.2% of the weight of the raw material. MDPE has a bimodal distribution of molecular weight, butene copolymerization, a comonomer content of about 3%, and a density of 0.936g / cm 3 ~0.938g / cm 3 , Medium density polyethylene with a melt flow rate MFR of 0.1-0.2g / 10min (190°C, 2.16kg). LLDPE is octene copolymer, density 0.920g / cm 3 ~0.925g / cm 3 , Linear low density polyethylene with a melt flow rate MFR of 0.8-1.0g / 10min (190°C, 2.16kg). Carbon black is nano-scale particle size (20-25nm), concentration 45-48%, carrier uses LDPE, density 1.20g / cm 3 ~1.25g / cm 3 , Melt flow rate MFR of 2.0 ~ 2.5g / 10min (190 ℃, 2.16kg) medium pigment carbon black masterbatch, as a UV shielding agent. The antioxidant is 2,6-...

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Abstract

The invention relates to a geomembrane and a preparation method thereof. The invention specifically relates to a smooth-surface geomembrane and a preparation method thereof. According to the invention, the geomembrane is composed of MDPE (medium density polyethylene), LLDPE (linear low density polyethylene), carbon (nano-leveled, with concentration of 45-48%), an antioxidant (hindered phenol), and a light stabilizer (hindered amine). Heating, shearing, and plasticizing are carried out, and three layers of membrane foam are formed by using a die head; the three layers of membrane foam are formed into one-layer membrane foam through seamless hot fusion; the formed membrane foam is subjected to transverse inflation orientation and longitudinal leading orientation, such that the smooth-surface geomembrane is prepared. The smooth-surface geomembrane provided by the invention has excellent environmental stress cracking capacity, outstanding flexibility, and balanced mechanical performance. The occurrence of geomembrane body loophole is avoided. The geomembrane has uniform thickness uniformity and smooth appearance.

Description

technical field [0001] The invention relates to a geomembrane and a manufacturing process thereof, in particular to a smooth geomembrane and a preparation method thereof. Background technique [0002] The raw material of traditional smooth geomembrane is HDPE (high-density polyethylene) plus carbon black masterbatch, and due to the single formula, the performance of geomembrane cannot meet the requirements of multi-environment and change when it is used, especially if it is not Projects with large uniform settlement or local settlement, and projects with serious pollution sources, such as mine heap leaching sites, landfill closures, and other projects that require high mechanical properties, flexibility, and stress cracking properties of materials. The flexibility, environmental stress cracking resistance, and balance performance of traditional smooth geomembranes cannot be used and meet the standards in these environments with complex or variable shapes. There are also LLD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K9/12C08K3/04B29C47/00
Inventor 陈锡明王锁华
Owner JIANGSU JINBA ENVIRONMENT TECH
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