Patent ID: 8440127
Filing Date: 2013-05-14
Classification: B29C,B29K,C08J

Abstract:
1. A method of manufacturing a polytetrafluoroethylene sheet, the method comprising: (i) providing a dispersion containing water as a dispersion medium, polytetrafluoroethylene particles, and a surfactant, applying a force to the dispersion, the force making the particles approach or contact with each other, thereby binding the particles to form a deformable polytetrafluoroethylene-containing solid material including the water, the surfactant and the bound particles, and discharging the formed solid material from an outlet of a pipe having a bent portion or a narrowed space, wherein the force is applied in the pipe by spraying the dispersion to an inner wall of the bent portion or the narrowed space of the pipe; (ii) deforming the solid material into a sheet form; and (iii) reducing a content of the water in the solid material deformed in the sheet form.