The invention discloses a preparation method for a low temperature resistant
geogrid. The preparation method comprises the following operating steps: (1) preparing a low temperature resistant additive, namely, placing
aluminium oxide, 3-hydroxyl-1-adamantaneacetic acid, N,N-di(octyl aminoethyl)
glycine hydrochloride,
titanium dioxide and
tungsten disulphide into a ball
grinding mill, mixing at a high speed to prepare the low temperature resistant additive; (2) mixing HDPE (High-Density
Polyethylene), an
antioxidant DLTP (Dilauryl Thiodipropionate), tetrabromo
bisphenol S, heptamethylnonane and dinonyl
phthalate, placing the mixture in a high-speed mixing
machine, mixing at a high speed, adding the low temperature resistant additive into the high-speed mixing
machine, and continuing mixing; (3) placing the mixture which is obtained in the step (2) into an extruding
machine for melting and extruding to prepare a plate; (4)
punching the plate to obtain mesh holes through a
punching machine; (5) performing unidirectional stretching and subsequent further horizontal stretching on a porous plate after the porous plate is heated through a preheating device so as to form a unidirectional or bidirectional stretched grid. The
geogrid prepared by the preparation has good low
temperature resistance, and can work normally in a low temperature environment and ensure the quality of a product.