Title:
FLUORORESIN PARTICLE MATERIAL AND METHOD FOR PRODUCING SAME, COMPOSITE PARTICLE MATERIAL AND METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING SPHERICAL FLUORORESIN PARTICLE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/139838
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for producing a fluororesin particle material, with which perfluorocarboxylic acids and salts thereof can be easily removed. This production method includes: a pulverizing step for pulverizing a resin raw material comprising polytetrafluoroethylene in a pulverizing atmosphere until a particle material having an average particle diameter of 5 µm or less is formed; and a moisture control step in which the amount of moisture contained in the pulverizing atmosphere is controlled such that the moisture content, if converted to a value per 1 m3 at a temperature of 25ºC and a pressure of 1 atm, is a prescribed value or higher so that the PFOA value of the particle material is 25 ppb or less. In the moisture control step, a feed gas in which the converted moisture content is less than the prescribed value is humidified and then supplied to the pulverizing atmosphere, or the pulverizing atmosphere is directly humidified. More specifically, it is preferable for the prescribed value to be 30 g/m3 or more.
Inventors:
TSUCHIYA MASAHIRO (JP)
TOMITA NOBUTAKA (JP)
WATANABE YUSUKE (JP)
ONDA HIROYUKI (JP)
TOMITA NOBUTAKA (JP)
WATANABE YUSUKE (JP)
ONDA HIROYUKI (JP)
Application Number:
PCT/JP2022/033632
Publication Date:
July 27, 2023
Filing Date:
September 08, 2022
Export Citation:
Assignee:
ADMATECHS CO LTD (JP)
International Classes:
C08J3/12
Domestic Patent References:
| WO2018212279A1 | 2018-11-22 | |||
| WO2019156065A1 | 2019-08-15 | |||
| WO2018211626A1 | 2018-11-22 |
Foreign References:
| JP2021178912A | 2021-11-18 | |||
| JP2021084934A | 2021-06-03 |
Attorney, Agent or Firm:
KYORITSU INTERNATIONAL (JP)
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