Package material and method of producing a package material

A package material, comprising:

• a fibrous material that includes waste paper and/or pulp;
• a binder;
• sodium hydrogen carbonate;
• a surfactant;
• and
• a water-soluble softener,
• the binder including one or more selected from polysaccharides and proteins,
• the softener being a water-soluble polyhydric alcohol having 3 to 15 carbon atoms,
• the number of carbon atoms and the number of hydroxy (OH) groups in a molecular structure of the polyhydric alcohol satisfying the following relationship:
• the number of hydroxy groups<the number of carbon atoms.

A method of producing a package material, comprising:

• a binder mixing step of mixing a binder including one or more selected from polysaccharides and proteins with an aqueous solution including a surfactant;
• a mixing step of mixing a composition that includes an aqueous solution including the surfactant and the binder, a fibrous material that includes waste paper and/or pulp, sodium hydrogen carbonate, and a softener that is a urea derivative having a chemical structural formula of R1, R2—N—CO—N—R3, R4 (R1 to R4:
• H or a saturated and/or unsaturated hydrocarbon group having 1 to 4 carbon atoms);
• and
• a foaming step of foaming the composition.