Preparation and molding technology of HDPE geomembrane

Abstract

The invention relates to a geomembrane preparation and molding technology. According to the technology, a geomembrane preparation and molding device is used and comprises vertical frames and a molding mechanism, the vertical frames are arranged on the existing working ground in a bilateral symmetry manner, the vertical frames are of inverted L-shaped structures, and the molding mechanism is arranged between the vertical frames. The HDPE geomembrane is prepared and molded by the aid of a design concept of combining multi-mode heating structures, the melting degree of HDPE particles is increased through a preheating and reheating melting mode, and the preheated HDPE particles can be in a scattering motion state from top to bottom through the arranged molding mechanism; according to the state, the phenomenon that the HDPE particles are stacked and bonded into clusters can be avoided, meanwhile, the preheating and softening uniformity of the HDPE particles can be improved, and the softening speed can be increased; the arranged reheating and melting structure is of a spiral type, so that the retention time of the HDPE particles in the structure can be prolonged, and then the melting effect of the HDPE particles is improved.

Description

technical field [0001] The invention relates to the technical field of geomembrane forming, in particular to a preparation and molding process of HDPE geomembrane. Background technique [0002] Geomembrane is a geotechnical anti-seepage material composed of plastic film as the anti-seepage base material and non-woven fabric. The anti-seepage performance of the new material geomembrane mainly depends on the anti-seepage performance of the plastic film. Simply put, the geomembrane is a A waterproof barrier material with high molecular polymer as the basic raw material, which is mainly divided into low-density polyethylene (LDPE) geomembrane, high-density polyethylene (HDPE) geomembrane and EVA geomembrane, taking HDPE geomembrane as an example, The molding process includes softening and melting of HDPE particles and preparing geomembrane by extrusion, inflation, flat extrusion, etc. However, the following problems will occur during the preparation and molding of HDPE geomembra...

AI Technical Summary

Problems solved by technology

[0003] 1. When HDPE particles are directly heated and melted in a piled state, the overall time required is longer, and due to the accumulation state, mutual stickiness and uneven heating are prone to occur. When HDPE particles are transported and heated at the same time, HDPE particles The overall residence time is shorter, so that the effect of heating and melting is lower;

[0004] 2. HDPE particles in a melted state or HDPE in a semi-melted and softened state are easy to adhere to the surface of the structure, and the amount of adhesion increases with the increase of working time, so that the overall utilization rate of HDPE particles is low, and the adhered The structure mostly adopts integral structure, which is not conducive to the development of cleaning work

Images