Preparation method of multi-layer heat insulation material

Abstract

The invention provides a preparation method of multi-layer heat insulation materials. The method comprises the following steps: preparing three kinds of rubber composite materials with different contents through double-roller open milling; carrying out micro-nano layered co-extrusion and calendering lamination on the three kinds of rubber composite materials; and performing hot-pressing vulcanization on the three kinds of rubber composite materials to obtain multi-layer heat insulation materials. According to the method provided by the invention, multi-layer heat insulation materials with excellent heat insulation performance and good formability can be rapidly prepared, the number of layers, thickness of the layers and a structure of the layers of the prepared materials are all controllable, a raw material formula is adjustable, the preparation method is simple, continuous batch production can be achieved, the production efficiency is high, and the quality is stable.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a preparation method of a multilayer heat insulating material. Background technique [0002] The design of high specific impulse engines and the use of high-energy propellants promote the upgrading and development of aerospace and defense equipment such as rockets and missiles. However, this also makes the working environment in the combustion chamber of solid rocket motors more and more severe. The heat flux and pressure increased sharply. Therefore, in order to resist and protect against high-temperature gas erosion for a long time, the heat insulation layer placed between the engine casing and the propellant grain needs to have better ablation resistance and heat insulation effect. EPDM rubber, silicone rubber, nitrile rubber, etc. have the advantages of excellent heat and oxygen aging resistance, excellent high and low temperature mechanical properties, high fi...

AI Technical Summary

Problems solved by technology

[0005] Although domestic and foreign researchers have made great progress in the performance optimization and preparation efficiency of the thermal insulation layer through formula design and traditional blending process in the past few decades, the research on the thermal insulation layer is still concentrated on the level of material formulation design, lacking the compounding of thermal insulation layer. Research on structural design and integrated molding process

At the same time, the preparation method of the thermal insulation layer by the traditional blending process can only realize the homogeneous dispersion of fillers, and cannot control the dispersion and distribution of functional components such as ablation-resistant fillers and lightweight thermal insulation fillers in the thermal insulation layer

Images