Geomembranes are made from polyethylene plastic particles and processed through special processes. Geomembranes are classified into several standards based on quality, including non-standard, national standard, brand new material, urban construction, and American standard. Among them, non-standard materials are processed with recycled materials, which have a plastic odor. Therefore, the non-standard geomembranes produced here are a bit pungent. Non standard geomembranes are only suitable for ordinary anti-seepage engineering, and the requirements are not strict in engineering. If it is a high standard geotextile film made of new materials or urban construction materials that meet national standards or above, there is no unpleasant odor.