Single-phase solution molding

A method of molding a single-phase solution, the method comprising:

• pressurizing a mold cavity of a mold above atmospheric pressure to a mold pressure, wherein the mold pressure is at least a pressure to maintain the single-phase solution as a homogeneous mixture;
• while maintaining the mold cavity at least at the mold pressure, filling the mold cavity with the single-phase solution;
• and
• cooling the single-phase solution below the glass transition temperature to form a single-phase solid article in the mold cavity.

A method of molding a single-phase polymer and gas solution, the method comprising:

• mixing a polymer composition above a glass transition temperature of the polymer composition with a gas above atmospheric pressure to form the single-phase solution;
• pressurizing a first mold cavity of a mold above atmospheric pressure to a mold pressure, wherein the mold pressure is at least a pressure to maintain the single-phase solution as a homogeneous solution;
• while maintaining the first mold cavity at least at the mold pressure, injecting the single-phase solution into the first mold cavity;
• cooling the single-phase solution below the glass transition temperature to form a single-phase solid article in the first mold cavity;
• and
• depressurizing the first mold cavity below the molding pressure.