Urethane foam molding and method for manufacturing same

Abstract

Provided are a urethane foam molding having high thermal conductivity and electrical insulating properties, and a method for manufacturing the urethane foam molding. The urethane foam molding has a base material composed of polyurethane foam, and composite particles blended with the base material and aligned so as to be joined with each other, and the composite particles are composed of thermally conductive particles composed of a nonmagnetic substance, and magnetic particles and insulating inorganic particles which are bonded to the surfaces of the thermally conductive particles by a binder. A powder of the composite particles can be manufactured by stirring a powder of the thermally conductive particles, a powder of the magnetic particles, a powder of the insulating inorganic particles, and a raw material powder including the binder, using a mixer granulator. The urethane foam molding is manufactured by injecting a raw material mixture, in which the powder of composite particles and the foam urethane resin raw material are mixed, into the cavity of a foaming die and performing foam molding while applying a magnetic field so that the magnetic flux density in the cavity is made substantially uniform.

Description

technical field [0001] The present invention relates to a polyurethane foam molding having high thermal conductivity and electrical insulation, and a method for producing the same. Background technique [0002] Polyurethane foam moldings are used in various fields such as automobiles and electronic equipment as sound absorbing materials and vibration absorbing materials. The polyurethane foam molding has many small cells (air cells) inside. Therefore, in the case of ordinary polyurethane foam moldings, the thermal conductivity is small, and heat dissipation is poor. Therefore, when it is arranged around an engine, a motor, etc. that generate heat, heat may be accumulated in the polyurethane foam molded product, which may cause a temperature rise. In order to solve such a problem, for example, Patent Documents 1 and 2 disclose a polyurethane foam molded article in which magnetic particles are mixed with polyurethane foam to improve heat dissipation. [0003] prior art lite...

AI Technical Summary

Problems solved by technology

Therefore, when it is arranged around an engine, a motor, etc. that are accompanied by heat dissipation, there is a possibility that heat will be accumulated in the polyurethane foam molded product and the temperature may rise.

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