Welding method of double-sided 2.0HDPE anti-seepage film

Description :

　　Welding of Double Smooth HDPE Impermeable Membrane

　　The welding of HDPE anti-seepage film uses a wedge welding machine and double track hot melt welding. For the parts that cannot be welded by the wedge welding machine, an extrusion type hot melt welding machine should be used, matched with welding rods of the same quality as the raw material, to form a single weld seam for overlay welding.

　　The welding process of the hot wedge welding machine is divided into: adjusting pressure, setting temperature, setting speed, checking weld overlap, installing film into the machine, and starting the motor.

　　2. There should be no oil stains or dust at the joints, and there should be no mud, condensation, moisture, or other debris on the overlapping section of the HDPE anti-seepage film. If there are any debris, they must be cleaned before welding. Welding method of double-sided 2.0HDPE anti-seepage film

　　3. At the beginning of each welding day, a 0.9mm × 0.3mm sample should usually be tested and welded on site, with a lap width of not less than 10cm, and peel and shear tests should be conducted on site. After the sample is qualified, the speed, pressure, and temperature adjusted at that time can be used for formal welding. During the welding process of the hot wedge welding machine, it is necessary to pay attention to the operation of the welding machine at all times and adjust the speed and temperature according to the actual situation on site.

　　4. The weld seam should be neat, beautiful, and free from any sliding or jumping phenomena. Welding method of double-sided 2.0HDPE anti-seepage film

　　When encountering insufficient length of geomembrane, longitudinal splicing is required. The transverse welds should be welded first, and then the longitudinal welds should be welded. If the distance between the transverse welds is greater than 50cm, they should form a T shape and not cross each other.

　　6. When welding the film, it is not allowed to press out dead folds. When laying HDPE geomembrane, the expansion deformation caused by temperature changes should be reserved according to the local temperature change amplitude and the performance requirements of HDPE geomembrane.

　　7. Welding cannot be carried out during rainy periods or when there is moisture, dew, or large sand in the joints, except for taking protective measures. Welding method of double-sided 2.0HDPE anti-seepage film

　　When the temperature is below 5 ℃, construction should not be carried out according to the specifications. If construction is necessary, the welding machine should be preheated before welding.

　　When welding HDPE anti-seepage film, a generator with good voltage stabilization performance should be used for power supply. In special cases where local electricity is used, a voltage stabilizer must be used.

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