Plastic geogrid production process


Plastic geogrid production process

The square or rectangular polymer web formed by stretching may be uniaxially stretched or biaxially stretched depending on the direction of stretching in the manufacture. It is punched on a extruded polymer sheet (mostly polypropylene or high density polyethylene) and then subjected to oriented stretching under heating. The uniaxial geogrid is only stretched along the length of the sheet; the biaxial geogrid is formed by continuing to stretch the unidirectionally stretched grid in a direction perpendicular to its length.

Since the polymer of the geogrid in the manufacturing process is rearranged and oriented with the heating extension process, the bonding force between the molecular chains is strengthened, and the strength is improved. Its elongation is only 10% to 15% of the original board. If an anti-aging material such as carbon black is added to the geogrid, it can have good durability against acid, alkali, corrosion and aging.


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