Polyetheretherketone-containing resin composition and seal ring

A resin composition comprising:

• a polyetheretherketone homopolymer;
• a polyetheretherketone recycled material;
• and
• a filler,
• wherein
• the polyetheretherketone recycled material comprises a polyetheretherketone homopolymer and a carbon bead or a glass bead;
• a total content of the polyetheretherketone homopolymer and the polyetheretherketone homopolymer in the polyetheretherketone recycled material, in the resin composition is in a range of 70 to 95 mass %;
• a percentage of the polyetheretherketone recycled material is 25 mass % or higher with respect to a total of the polyetheretherketone homopolymer and the polyetheretherketone recycled material;
• the filler has a content of from 5 to 30 mass % and has an aspect ratio of from 1 to 3;
• the filler includes a carbon bead or a glass bead;
• and
• each of a tensile strength retention rate, a bending strength retention rate, and a bending elastic modulus retention rate of the resin composition are 95% or higher.