Aqueous fluororesin dispersion and method for producing the same

A method for producing an aqueous fluororesin dispersion,

• wherein a crude aqueous fluororesin dispersion comprising a melt-processable fluororesin particle dispersed in an aqueous medium is subjected to a treatment in contact with an ion exchange resin and a concentration by phase separation in the presence of an electrolyte and/or a nonfluorinated anionic emulsifier to thereby obtain the aqueous fluororesin dispersion,
• wherein the crude aqueous fluororesin dispersion is brought into contact with the ion exchange resin,
• and then, after the step of adding the electrolyte and/or the nonfluorinated anionic emulsifier, the concentration by phase separation is carried out,
• wherein the electrolyte is at least one selected from the group consisting of sulfuric acid, succinic acid, carbonic acid, and salts thereof, and
• wherein the nonfluorinated anionic emulsifier is one such that a 0.1% (by mass) aqueous solution thereof has a surface tension of not higher than 60 mN/m.