Construction welding of HDPE impermeable film:

Construction welding of HDPE impermeable film:  

The welding of HDPE impermeable film uses wedge welder and double track hot melt welding.  Wedge welder can not weld parts, should be used extrusion hot melt welder, with the raw material homogenous electrode, forming a surfacing single weld.  

1. Hot cheese welder welding process is divided into: pressure adjustment, set temperature, set speed, weld lap inspection, film loading machine, start motor.  

2 joints shall not have oil, dust,HDPE impermeable film lap section surface should not have silt, dew, moisture and other debris, when there is debris must be cleaned up before welding.  

3. At the beginning of welding every day, a sample of 0.9mm×0.3mm should be welded on site with lap width not less than 250px, and the stripping and shear test should be carried out on site. After the sample is qualified, the welding can be carried out at the speed, pressure and temperature adjusted at that time.  Hot cheese welder in the welding process, it is necessary to pay attention to the operation of the welder, according to the actual situation of the site speed and temperature fine tuning.  

4. The weld shall be neat and beautiful, and shall not slip or jump away.  

5. When the length of the geomembrane is not enough, the long splicing is needed. The transverse weld should be welded well first, and then the longitudinal seam should be welded.  

6. When the welding film is not pressed out of the dead fold, the laying of HDPE geomembrane, according to the local temperature range and the performance requirements of HDPE geomembrane, the expansion deformation caused by the temperature change is reserved.  

7. Welding should not be carried out during rain or when there is moisture, dew or heavy sand on the joints, unless protective measures are taken.  

8. When the temperature is lower than 5℃, it should not be constructed according to the requirements of the code. If it must be constructed, the welding machine should be preheated before welding.  

9.HDPE impermeable geomeme should be powered by a generator with good voltage stability when welding. In special circumstances, when local electricity is used, a voltage regulator must be used.