Title:
PISTON RING AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2023028623
Kind Code:
A
Abstract:
To provide a piston ring and a method of manufacturing the same having a low content of sulfur atoms, not requiring a special exposure device, not requiring strict safety measures, and inexpensive.SOLUTION: A piston ring 1 used in a reciprocating type compressor for compressing gas is made of a resin composition having polyether ether ketone resin as a main component. In a temperature rising process of differential scanning calorimetry, a heat absorption peak by a thermal history is within a range of 150°C to 330°C, and a content of sulfur atoms is equal to or less than 250 ppm.SELECTED DRAWING: Figure 1
Inventors:
YASUDA TAKESHI
Application Number:
JP2021134449A
Publication Date:
March 03, 2023
Filing Date:
August 19, 2021
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F04B39/00; F16J9/28
Attorney, Agent or Firm:
Wake Hikari
Waki
Satoshi Teramoto
Waki
Satoshi Teramoto