Modified chlorinated polyethylene waterproof roll and method for preparing same

Abstract

The invention relates to a waterproof roll, in particular to a modified chlorinated polyethylene waterproof roll and a method for preparing the same, which solve the problems that the conventional waterproof roll cannot meet various performance indexes of products and the cost of formula is too high. The modified chlorinated polyethylene waterproof roll is prepared from an ethylene-octene copolymer, chlorinated polyethylene, linear high-pressure polyethylene, a filling reinforcing agent, a softening plasticizer, a phenolic antioxidant, a heat stabilizer, a lubricant and a light stabilizer. The method comprises the following steps of mixing and stirring various raw materials; pelleting the mixture by using a plastic mixing mill, a double roller and a pelletizer; putting granules into a single-screw extruder to extrude and then molding the granules through a die; and putting the molding materials into a three-roller cooling embossing machine to press the waterproof roll. The waterproof roll not only maintains specific flexibility, elongation and resilience of rubber, but also maintains higher tensile breaking strength of LLDPE; the waterproof roll has the advantages of good flexibility, flatness and evenness of the whole sheet, excellent ageing-resistance performance, physical performance and processing performance, and low production cost; and the performance indexes exceed national standards and relative standards of the Ministry of Railways.

Description

technical field [0001] The invention relates to a waterproof coiled material, in particular to a modified chlorinated polyethylene waterproof coiled material with excellent aging resistance, physical properties and processing properties 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 ...

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.