Preparation method of flame-retardant shock-absorbing rubber strip for access control system

Abstract

The invention provides a preparation method of a flame-retardant shock-absorbing rubber strip for an access control system. The preparation method comprises the following steps: carrying out treatmentto obtain activated carbon loading zinc oxide, wherein the activated carbon plays roles of being catalytic and synergic, flame-retardant and improving aging; then compounding the activated carbon anda flame retardant ammonium polyphosphate to nitrile rubber, wherein the fireproof flame retardance can be improved obviously without affecting the elasticity and mechanical properties, and the ageingperformance is improved; and then carrying out cooking by means of an ethylene-vinyl acetate copolymer, EPDM grafted maleic anhydride and the like to improve the defects that the EPDM is relatively poor in autohension, mutual viscosity and flame retardance, wherein conventional mixing and plastifying are replaced. By means of laminating, compounding, plastifying and vulcanizing, the prepared rubber strip has good elasticity, flame retardance and antiageing performance, and solves the problem that conventional mixing and plastifying are poor in compatibility. The preparation method is simple,wide in source of raw materials and low in cost, has a relatively good application prospect and is worth being popularized.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a method for preparing a flame-retardant and shock-absorbing rubber strip for an access control system. Background technique [0002] Rubber products, including tires, gaskets, conveyor belts, cushions, equipment sheaths, and buffer connection devices on locomotives, are widely used in industrial fields. With the rapid development of my country's economic level and industrial technology, rubber damping components are widely used in automatic revolving doors because of their good elasticity and excellent fatigue resistance. Because rubber has good elasticity in a certain temperature range, rubber is often used as a sealing material in electric door systems in our country. But at present in this kind of rubber material, the biggest disadvantage of rubber is that it is easy to burn, and it will produce thick smoke when burning, which will aggravate the spread of flame and increase the danger ...

AI Technical Summary

Problems solved by technology

But at present in this kind of rubber material, the biggest disadvantage of rubber is that it is easy to burn, and it will produce thick smoke when burning, which will aggravate the spread of flame and increase the danger of fire in the fire, so in order to improve the fire safety of electric doors , the rubber sealing strip should be treated with certain flame retardant treatment, but the added flame retardant will affect other physical properties of the rubber to a certain extent, and it cannot meet the requirements of shock absorption, high elasticity, and sealing box resistance in the automatic door system. Fatigue and other properties, therefore, it is urgent to solve the problem of rubber material flame retardancy without affecting its own performance