Aqueous dispersion of polyester-type elastic material, and method for producing same

A method for producing an aqueous dispersion of a polyester-type elastic material comprising:

• a step of preparing a mixture liquid of a polyester-type elastic material, a non-ionic surface active agent, and an aqueous medium;
• and
• a step of emulsifying the polyester-type elastic material with setting a temperature of the mixture liquid to be a temperature between a temperature lower by 40° C. than a melting point of the polyester-type elastic material and a temperature higher by 100° C. than the melting point, wherein
• the method uses 1 to 20 parts by mass of the non-ionic surface active agent relative to 100 parts by mass of the polyester-type elastic material.