Is inoue foam suitable for all parts of high-speed rail cars?

Inoue foam has many advantages, but it is not suitable for all parts of high-speed rail cars.

Core area of electrical equipment (in some cases)

There are some high-precision electronic components that are very sensitive to static electricity in the core electrical equipment such as the electrical control cabinet of high-speed rail. Although the foam on the well has certain insulation, in some cases, static electricity may accumulate, which will damage these high-precision electronic components. For example, some VLSI chips may be damaged even by tiny electrostatic discharge, so it may not be suitable to use inoue foam in the most precise parts of these electrical equipment.

Moreover, in the heat dissipation area of electrical equipment, such as power amplifier and other parts with high calorific value, if ordinary inoue foam is used, the heat dissipation effect may be affected. Because the thermal insulation of foam may prevent the heat dissipation, the equipment temperature is too high, thus affecting the performance and life of the equipment.

Near high temperature power equipment

The traction motor and other power equipment at the bottom of the high-speed rail car will generate a lot of heat during operation, and the temperature may reach a very high level. The general inoue foam may have performance degradation under continuous high temperature environment, such as loss of elasticity, deformation or even melting. For example, when the temperature exceeds its tolerance limit (different types of foam have different tolerance temperatures, and some may start to show performance changes at around 100℃), it will not be able to play its buffering and other functions normally, so the parts near these high-temperature power equipment are not suitable for use.

Direct contact and friction parts of track

Materials with high wear resistance and hardness are needed for the parts such as wheels and brake discs that directly contact with the track and generate friction. Inoue foam is soft in texture and poor in wear resistance. When used in these parts, it will wear quickly and cannot withstand the huge friction caused by rail friction and braking, thus affecting the driving safety of high-speed rail.