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| Test | Unit | Standard | Test Frequency |
RH75 | RH10 | RH15 | RH20 | RH30 | |
| Mechanical Properties | Thickness | mm | D5199 | per roll | 0.75 | 1.00 | 1.50 | 2.00 | 3.00 |
| Density | g/cc | D1505/D792 | 90,000 kg | 0.94 | |||||
| Tensile Properties | D 6693 | ||||||||
| · yield strength | kN/m | Type IV | 9,000 kg | 11 | 15 | 22 | 29 | 44 | |
| · break strength | kN/m | 20 | 27 | 40 | 53 | 80 | |||
| · yield elongation | % | 12 | 12 | 12 | 12 | 12 | |||
| · break elongation | % | 700 | 700 | 700 | 700 | 700 | |||
| Tear Resistance | N | D 1004 | 20,000 kg | 93 | 125 | 187 | 249 | 374 | |
| Puncture Resistance | N | D 4833 | 20,000 kg | 240 | 320 | 480 | 640 | 960 | |
| Stress Crack Resistance | hr. | D 5397 | per GRI GM-10 | 500 hr. | |||||
| Carbon Black Content | % | D 4218 | 9,000 kg | 2.0-3.0% | |||||
| Reference Propertied | Oxidative Induction Time | min | D 3895 | 90,000 kg | 100 min. | ||||
| (a) Standard OIT | D 5885 | ||||||||
| (b) High Pressure OIT | 400 min. | ||||||||
| Oven Aging at 85°C retained after 90 days |
% | D 5721 | per each | ||||||
| (a) Standard OIT - % | D 3895 | formulation | 55% | ||||||
| (b) High Pressure OIT - % | D 5885 | 80% | |||||||
| UV Resistance | % | per each | |||||||
| High Pressure OIT - % retained after 1600 hrs |
D 5885 | formulation | 50% | ||||||
| Roll Size | Roll Width | m | 7/8 | 7/8 | 7/8 | 7/8 | 7 | ||
| Roll Length | m | 280 | 210 | 140 | 105 | 70 | |||
| Size stability | % | 2% | |||||||
1. High anti-seepage performance
The core advantage of geomembranes lies in their extremely low permeability coefficient, which far exceeds traditional anti-seepage materials (such as clay or concrete). Its dense polymer structure can almost completely block the penetration of liquids (such as water, leachate, oil) and gases (such as methane and hydrogen sulfide). For example, in a landfill, a 1.5mm thick HDPE geomembrane can reduce the leakage of leachate to less than 1 liter per square meter per year, significantly reducing the risk of groundwater pollution. In addition, through double-track hot-melt welding technology, the permeability coefficient of the joint is consistent with that of the parent material, ensuring the integrity of the overall anti-seepage system.
2. Chemical corrosion resistance
Geomembranes have excellent chemical stability to acids, alkalis, salts, oils and various organic solvents, especially in HDPE materials.
Acidic environment: It can withstand strong acid and alkali media with a pH value of 1 to 14. For example, in chemical wastewater pools, HDPE geomembranes can be in contact with 30% sulfuric acid or sodium hydroxide solutions for a long time without corrosion.
Oil media: It is resistant to dissolution of hydrocarbon substances such as diesel, gasoline, and mineral oil, and is suitable for anti-seepage of oil storage tanks.
Saline environment: In salt lake areas or seawater aquaculture ponds, it can resist chloride ion erosion and avoid the peeling problem of traditional concrete structures.
Tai'an City RuiHeng Building Materials Co., Ltd is specialized in the research, development, production and sales of geosynthetic materials, plastic products and plastic machinery. Our company is devoted to geosynthetic material research and development and application.
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