As people's needs continue to grow, the performance of a single material can no longer meet today's requirements, multi-functional materials gradually replaced. For example, the two properties of insulation and sound insulation are very important in the fields of construction, automobiles, ships, etc., which can improve energy efficiency and improve environmental comfort. Is there any material that can keep heat and sound insulated?

The answer is yes. The following are commonly used materials for both insulation and sound insulation:

1. Rock wool

Rock wool is a common multifunctional sound insulation material. It is made of raw materials such as basalt and pyroxene, and has an open-hole fiber structure inside, which can effectively block the propagation path of sound waves, reduce noise transmission, and also block heat transfer and reduce energy loss. Therefore, rock wool is widely used in construction, industry, pipeline and other fields of insulation, sound insulation, fire prevention and so on.

2. Glass wool

Glass wool and rock wool are inorganic fiber materials, which are made of quartz sand as the main material, and also have thermal insulation, fire retardant, sound absorption and sound insulation properties. Unlike rock wool, glass wool has better thermal insulation performance and lighter material, but the fire resistance is not as good as rock wool.

3. Rubber and Plastic

Rubber is a kind of polymer material, which is made of rubber and plastic as the main material, and has a closed cell foam structure inside. The thermal insulation and sound insulation performance of rubber and plastic benefit from this structure, and the waterproof and moisture-proof performance of rubber and plastic is better. The only disadvantage is that the fire performance is insufficient, so the rubber factory is used for pipes, equipment, building walls, HVAC and other fields

4. Aerogel products

Aerogel products are made of aerogel composite with other materials (such as glass fiber, pre-oxygenated silk, etc.). Aerogel is a kind of solid material with high pore structure and extremely low density, with low thermal conductivity (0.015-0.025W/(m·K)), sound absorption, fire resistance, etc. The disadvantage is that it is more brittle, so it will be combined with other materials to enhance mechanical properties. It is widely used in construction, industry, petrochemical, aerospace and other fields.

There are many materials for insulation and sound insulation, such as rock wool, glass wool, rubber and plastic, aerogel products, etc., and they have been widely used.