Preparation method of damping material used for installing draught fan

Abstract

The invention relates to a preparation method of a damping material used for installing a draught fan. The preparation method comprises the following steps: 1, putting nanometer carbon black, silica sol and addition agents into waterborne polyurethane latex, conducting ultrasonic treatment, and obtaining composite emulsion for standby application; 2, conducting mixing, grinding and dispersing on expanded vermiculite, cristobalite, bentonite and 3-phenyl-2-propyl acrylate for 2-2.5 h, mixing the obtained materials with other residual materials, stirring the mixture evenly and sufficiently, putting the mixture into a twin-screw extruder, conducting prilling by fusing and extrusion at the temperature ranging from 180 DEG C to 190 DEG C, and obtaining modified master batches; 3, putting the modified master batches into a screw extruder for being fused, spraying the flux out through a melting-spraying die head spinning orifice at the temperature ranging from 230 DEG C to 250 DEG C, stretching the flux under the effect of high-speed hot air flow, putting the flux into a receiving device, and after the composite emulsion is solidified and dried completely, obtaining the finished damping material. The phenolic resin damping material wrapped by expanded vermiculite-polyurethane composite emulsion which is obtained through preparation is low in mass, small in thickness and quite good in damping effect.

Description

technical field [0001] The invention relates to a vibration damping material, in particular to an expanded vermiculite-polyurethane composite emulsion-coated phenolic resin vibration damping material for interior decoration. Background technique [0002] Now, with the continuous acceleration of urbanization and the construction of a large number of high-rise buildings, the noise pollution caused by the supporting ventilation system is becoming more and more serious. The fixed fan will vibrate during work, which will cause low-frequency noise. Working and living in an environment with low-frequency noise for a long time will have adverse effects on human health, mental state and emotion. At the same time, long-term vibration will cause fatigue damage to the building and seriously affect the structural safety of the building. In order to effectively reduce vibration and isolate noise, the usual solution is to use vibration-absorbing materials. Existing damping materials are ...

AI Technical Summary

Problems solved by technology

The actual use effect of these damping materials is not very good, so the usual solution is to increase the thickness of the damping material and complicate the damping structure

The problem caused by this is that the quality of the damping material is too heavy, the cost is too high, and the installation process is very inconvenient.