Waterproof product containing linear low density polyethylene and preparation method thereof

Abstract

The invention relates to a waterproof product containing linear low density polyethylene (LLDPE), in particular to a waterproof coiled material and a preparation method thereof, solving the problems of low performance index and high formulation cost of the waterproof coiled materials in the prior art. The waterproof coiled material is prepared by ethylene-octylene copolymers, chlorinated polyethylene, LLDPE, filling and reinforcing agents, softening and plasticizing agents, phenolic antioxidants, heat stabilizing agents, lubricants and light stabilizing agents. The method is characterized by mixing and stirring all the raw materials, adopting a plastic refining machine, a two-roll machine and a grain cutting machine in sequence for granulation, throwing the grains into a single screw extruder to be extruded and molding the grains with molds; and throwing the molded grains into a three-roll cooling embossing machine to be rolled, thus preparing the waterproof coiled material. The waterproof coiled material not only retains the special softness, elongation and resilience of the rubber, but also retains higher tensile strength at break of LLDPE, has good softness, straightness and flatness, has performance index in excess of the national standard and related standards of the Ministry of Railways, has excellent aging resistance, physical performance and processability and has low production cost.

Description

technical field [0001] The invention relates to a waterproof product containing linear high-pressure polyethylene, in particular to a waterproof coiled material containing linear high-pressure polyethylene and a preparation method thereof. Background technique [0002] At present, the N-type (non-composite layer membrane) and L-type (double-sided composite non-woven fabric) waterproof membranes for bridges produced by various manufacturers basically use high-pressure polyethylene or linear high-pressure polyethylene to modify chlorinated polyethylene. Do waterproof membrane substrate. Although the formulas and processes of various manufacturers are different, there are great defects; (1) if high-pressure polyethylene or linear high-pressure polyethylene is used as the main body, although various mechanical properties can reach the relevant standards of the Ministry of Railways, but, The softness, flatness and resilience of the product are far from meeting the requirements o...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing two types of waterproof coiled materials for bridge engineering basically use high-pressure polyethylene to modify chlorinated polyethylene as the base of the waterproof coiled material, which cannot fully meet the performance indicators of the product

If thermoplastic rubber SBS or thermoplastic elastomer TPE is used as the main material, the formula cost is too high, and a modified chlorinated polyethylene waterproof membrane and its preparation method are provided.