| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent diaphragm for diaphragm valve which eliminates or reduces uneven distribution (non-uniformity) of a fiber sheet, and has required durability and strength, by improving or devising a structure having a fiber sheet made of synthetic resin in the middle of a rubber sheet in a thickness direction. SOLUTION: The diaphragm for diaphragm valve has a fiber sheet 2 made of synthetic resin in the middle of a rubber sheet 1 in the thickness direction. The fiber sheet 2 is preliminary formed in the shape of the diaphragm in a free state or a similar shape, and is also subjected to heat shrinkage in advance. COPYRIGHT: (C)2012,JPO&INPIT |
