Waterproof component, electronic equipment comprising same, waterproofing method using insert-molded body, and waterproofing method for electronic equipment

A method for waterproofing an article, comprising insert molding a thermoplastic resin composition and a metal component, wherein:

• the thermoplastic resin composition comprises a thermoplastic resin and an inorganic filler;
• the content of the inorganic filler is 8 to 130 parts by mass based on 100 parts by mass of the thermoplastic resin;
• the inorganic filler is at least either one of a spherical inorganic filler and a tabular inorganic filler;
• the spherical inorganic filler has an average particle diameter of 2 μm or more and 200 μm or less;
• and
• the tabular inorganic filler has an average particle diameter of 2 μm or more and 200 μm or less and has an average aspect ratio of 10 or more and 200 or less.

A method for producing a waterproof component, comprising insert molding a thermoplastic resin composition and a metal component, wherein:

• the thermoplastic resin composition comprises a thermoplastic resin and an inorganic filler;
• the inorganic filler is at least either one of a spherical inorganic filler and a tabular inorganic filler;
• the spherical inorganic filler has an average particle diameter of 2 μm or more and 200 μm or less;
• the tabular inorganic filler has an average particle diameter of 2 μm or more and 200 μm or less and has an average aspect ratio of 10 or more and 200 or less;
• and
• the thermoplastic resin composition is obtained by melt kneading of the inorganic filler at a concentration of 8 to 130 parts by mass based on 100 parts by mass of the thermoplastic resin.