Rigid polyurethane foam sandwich panels are composite materials consisting of an insulating layer of rigid polyurethane foam core sandwiched between two layers of structural material, typically metal or fiberglass reinforced plastic. These panels are widely used in the construction industry for applications such as roofing, wall cladding, and cold storage facilities. The rigid polyurethane foam core provides excellent thermal insulation properties, high strength-to-weight ratio, and good fire resistance, making it a popular choice for energy-efficient and sustainable building construction.
The market for rigid polyurethane foam sandwich panels is experiencing steady growth driven by several key factors. One of the main market drivers is the increasing demand for energy-efficient buildings

A harmonic reducer (also known as a Harmonic Gear Drive or Harmonic Drive Reducer) is a high-precision mechanical transmission device primarily used to reduce speed and increase torque. It consists of three main components: a wave generator, a flexspline, and a rigidspline. The working principle of a