Starch slurries, systems and methods of making starch slurries, and systems and methods of making insulated products using starch slurries

A starch slurry comprising:

• a starch in an amount of approximately 25 to 91 weight percent;
• a plasticizer in an amount of approximately 3 to 30 weight percent;
• water in an amount of approximately 5 to 60 weight percent;
• and
• a blowing agent in an amount of approximately 1 to 30 weight percent,
• wherein a bulk density of the starch slurry is approximately 20 to 80 pounds per cubic foot, and
• wherein the blowing agent comprises sodium bicarbonate.

A method of making a foamed part, the method comprising:

• mixing a starch, a plasticizer, water, and sodium bicarbonate together to form a starch slurry;
• depositing the starch slurry onto a substrate;
• and
• expanding the starch slurry to create a foam layer on the substrate.