Patent ID: 6899932

Claim:
A polytetrafluoroethylene block-shaped molded article having a melt viscosity and a block deformation amount contained within a polygonal region surrounded by a straight line A: x=1.0×10 9 (melt viscosity of 1.0×10 9 poise), a straight line B: x=2.5×10 10 (melt viscosity of 2.5×10 10 poise), a straight line C 1 : y=7.0 (block deformation amount of 7.0%), a straight line D 1 : y=0 (block deformation amount of 0%), a straight line E 1 : y=−8.7 Log 10 (x)+91 in a graph with an x-axis being a common logarithm of the melt viscosity (poise) at 380° C. of polytetrafluoroethylene and a y-axis being the block deformation amount (%) which is a weight loss until a stable film or sheet is cut from the molded article, wherein the polytetrafluoroethylene block-shaped molded article is obtained by compression-molding and baking a polytetrafluoroethylene powder obtained by suspension polymerization, and said polytetrafluoroethylene block-shaped molded article is cylindrical and has a height of at least 800 mm.