Porous single resin fiber composite material and method for manufacturing porous single resin fiber composite material

A porous single resin fiber composite material comprising:

• a first fibrous particle;
• and
• a bicomponent polymer fiber comprising:
• a core comprising a second fibrous particle;
• and
• a sheath comprising a binder, wherein the binder binds the first fibrous particle and the second fibrous particle,
• wherein the first fibrous particle and the second fibrous particle are bound by the binder so as to form a random network structure comprising pores,
• wherein the first fibrous particle is a polyester-based fiber comprising a first polyester-based resin, and the first fibrous particle is a stretched polyester-based fiber having an elongation rate ranging from 300% to 600%,
• wherein the second fibrous particle is a polyester-based fiber comprising a second polyester-based resin, and the second fibrous particle is an unstretched polyester-based fiber having an elongation rate of 0% or a stretched polyester-based fiber having an elongation rate of less than 300%,
• wherein the binder comprises a third polyester-based resin,
• wherein a melting point of the second polyester-based resin is higher than the melting point of the third polyester-based resin,
• wherein a weight ratio between the first fibrous particle and a sum of the second fibrous particle and the binder ranges from 25:75 to 40:60,
• wherein the porous single resin fiber composite material is a board having a basis weight ranging from 600 g/m2 to 3000 g/m2,
• wherein a density of the porous single resin fiber composite material ranges from 0.2 g/cm3 to 1.6 g/cm3, and
• wherein a porosity of the porous single resin fiber composite material ranges from 40% by volume to 80% by volume.