Below, please allow Tai'an Wolong Engineering Materials Co., Ltd. to introduce the welding techniques and selection tips for waterproof membranes, hoping it will be helpful to all.

HDPE waterproof geomembrane possesses environmental protection features, is easy to clean, and improves the efficiency of fertilization and feeding. It prevents water from seeping into the soil layer in ponds, helps monitor water levels rationally, and saves on water resource costs. It also prevents harmful chemicals from leaching into fish ponds from the ground, reducing water source environmental pollution.

Welding Methods for HDPE Liners

HDPE渗漏 barrier is a plastic film made of HDPE, with 97.5% being high-density polyethylene and approximately 2.5% consisting of carbon black, anti-aging agents, antioxidants, UV absorbers, and stabilizers as auxiliary materials.

Hot Melt Welding:

Geotextile membrane blocks must overlap by 15 cm prior to welding, and the blocks should be adjusted to minimize creases and the potential for forming a "fish mouth" seam.

(2) Extrusion Welding

Geotextile membrane blocks should overlap by 7.5 cm for welding and stitching. The stitching area must be cleaned prior to stitching to ensure it is clean and free of water, dust, debris, or any fragments.

Welding requirements for waterproof membranes:

Whether it's productive welding or trial welding, maintain the temperature, speed, and pressure to achieve good welding results.

Each weld should be inspected, and the welding rod should remain clean and dry.

(3) When welding along the slope, the weld seam should extend along the gradient and not cross it. Minimize welding at the edges and scattered membranes as much as possible.

Surface of the HDPE geomembrane should be free of oils, moisture, dust, debris, and other杂物.

(5) At the joints of HDPE geomembrane, wrinkles should be removed. When the size of the wrinkle is less than 10 cm, use a circular or elliptical patch, and the patch should extend 5 cm beyond the edge of the cut.

When environmental temperatures and adverse weather conditions severely impact the welding of HDPE geomembranes, operations should be halted.

(7) Regular maintenance of welding machines is crucial; frequently clean residual materials from the welding equipment.