Porous member

#The present invention relates to a porous member.

#Conventionally, filters such as an air filter, filtration filter and the like have been used widely in semiconductor manufacturing industry and other industries. In recent years, filters composed of polytetrafluoroethylene (PTFE) porous membrane with extremely low pressure loss and extremely high trapping efficiency have attracted attention.

#The filters composed of PTFE porous membrane can be produced, for example, by the following method. First, a sheet-like molded body of un-sintered or semi-sintered PTFE is formed and then the resultant sheet-like molded body is stretched to form cracks, thereby forming pores in the sheet-like molded body to produce the filter.

#FIG. 1(a) and FIG. 1(b) are a plan view and a vertical sectional view of the member relating to the embodiment.

#FIG. 2(a) and FIG. 2(b) are a plan view and a vertical sectional view of the porous member relating to the embodiment.

#FIG. 3 is a photograph of a sample before the experiment relating to the example.

#Hereinafter, the embodiments of the present invention will be described in reference to the drawings. FIG. 1(a) and FIG. 1(b) are a plan view and a vertical sectional view of the member relating to the embodiment and FIG. 2(a) and FIG. 2(b) are a plan view and a vertical sectional view of the porous member relating to the embodiment.

#As shown in FIG. 1(a) and FIG. 1(b), a pretreatment member 1 having a predetermined shape and containing carbon fiber 2 not removed, which will be described later, is provided. The member 1 is constructed from a fluororesin 3 containing the carbon fiber 2. The carbon fiber 2 is contained in the fluororesin 3 nearly uniformly and, in this embodiment, the carbon fiber 2 is arranged so that the longitudinal direction of the carbon fiber 2 is along the thickness direction of the member 1.

#As the fluororesin 3, for example, tetrafluoroethylene/perfluoroalkylvinylether copolymer (PFA), polytetrafluoroethylene (PTFE), tetrafluoroethylene/hexafluoropropylene copolymer (FEP), tetrafluoroethylene/hexafluoropropylene/perfluoroalkylvinylether copolymer (EPE), or tetrafluoroethylene/ethylene copolymer (ETFE) and the like are exemplified.