Fiber-reinforced molded body and method for producing fiber-reinforced molded body

A fiber-reinforced molded body comprising a matrix resin, reinforcing fibers and hollow particles,

• wherein the hollow particles comprise a shell containing a resin and a hollow portion surrounded by the shell;
• wherein the shell contains, as the resin, a polymer in which from 81.5 parts by mass or more and 98 parts by mass or less of a crosslinkable monomer unit and 2 parts by mass or more of a hydrophilic non-crosslinkable monomer unit are contained in 100 parts by mass of all monomer units,
• wherein the crosslinkable monomer unit comprises a bifunctional crosslinkable monomer unit derived from a bifunctional crosslinkable monomer and a trifunctional or higher-functional crosslinkable monomer unit derived from a trifunctional or higher-functional crosslinkable monomer,
• wherein the hydrophilic non-crosslinkable monomer unit is derived from a hydrophilic non-crosslinkable monomer having a solubility of 0.3 g/L or more in distilled water at 20° C.,
• wherein a content of the bifunctional crosslinkable monomer unit is 65 parts by mass or more, and a content of the trifunctional or higher-functional crosslinkable monomer unit is 15 parts by mass or more, in 100 parts by mass of all monomer units of the polymer;
• and
• wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of acetone and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25° C., less than 5% by mass of the hollow particles submerge in the acetone.