Fibrous cellulose-containing material and method for producing same, dried fibrous cellulose and method for producing same, and fibrous cellulose composite resin and method for producing same

A method for producing dried fibrous cellulose, comprising:

• preparing a dispersion liquid of cellulose microfiber by fibrillating raw material pulp to the extent that the average fiber length is 0.02 to 3.0 mm, a pulp viscosity is more than 4 cps, and a fibrillation ratio is 1.0% to 8.37%;
• preparing a fibrous cellulose-containing material by mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 km;
• and
• concentrating the fibrous cellulose-containing material to a water content ratio of 95% or less, and then performing drying.

A method for producing a fibrous cellulose composite resin, comprising:

• preparing a dispersion liquid of cellulose microfiber by fibrillating raw material pulp to the extent that the average fiber length is 0.02 to 3.0 mm, a pulp viscosity is more than 4 cps, and a fibrillation ratio is 1.0% to 8.37%;
• preparing a fibrous cellulose-containing material by mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 μm;
• preparing dried fibrous cellulose by drying the fibrous cellulose-containing material;
• and
• kneading the dried fibrous cellulose.