Porous synthetic resin molded part and method of producing the same

摘要

A method of producing a porous molded part includes a mixing process for mixing a granular porous organizer composed of a water-soluble compound, a porous forming assistant agent composed of a polyhydric alcohol, and a cross-linking agent composed of an organic peroxide with a thermoplastic resin composition having a glass transition temperature below 0° C. to obtain a molding material; a cross-linking and forming process for placing the molding material in a molding die and performing a heat press molding thereby progressing coincidentally a cross-linking reaction and a shape forming of a seal face to obtain a molded material; an extracting process for extracting the granular porous organizer from the molded material obtained in the cross-linking and forming process to obtain a porous molded part; and a drying process for drying the porous molded part obtained in the extracting process.

主权项

1. A porous synthetic resin molded part, comprising:
a granular porous organizer composed of pentaerythritol, a first porous forming assistant agent composed of polyethylene glycol, a second porous forming assistant agent composed of glycerin, a cross-linking agent composed of an organic peroxide; and a thermoplastic resin having a glass transition temperature below 0° C., wherein said granular porous organizer is contained at an amount double of that of the thermoplastic resin, and said second porous forming assistant agent is contained at an amount one tenth of that of the thermoplastic resin.