US 12,174,576 B2
Cleaning member and elastic member
Masanori Yokoyama, Shizuoka (JP); Kenya Terada, Shizuoka (JP); Takehiko Aoyama, Shizuoka (JP); Shota Segawa, Shizuoka (JP); Hisao Kato, Kanagawa (JP); Mitsuhiro Kunieda, Kanagawa (JP); and Arihiro Yamamoto, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 27, 2023, as Appl. No. 18/519,423.
Application 18/519,423 is a continuation of application No. PCT/JP2022/021388, filed on May 25, 2022.
Claims priority of application No. 2021-094304 (JP), filed on Jun. 4, 2021; and application No. 2022-079036 (JP), filed on May 12, 2022.
Prior Publication US 2024/0111241 A1, Apr. 4, 2024
Int. Cl. G03G 21/00 (2006.01); B60S 1/04 (2006.01); B60S 1/38 (2006.01); G03G 15/02 (2006.01); G03G 15/16 (2006.01); G03G 15/20 (2006.01); G03G 21/16 (2006.01)
CPC G03G 21/0029 (2013.01) [B60S 1/0419 (2013.01); G03G 15/0225 (2013.01); G03G 15/0258 (2013.01); G03G 15/161 (2013.01); G03G 15/166 (2013.01); G03G 15/168 (2013.01); G03G 15/2025 (2013.01); G03G 21/0011 (2013.01); G03G 21/0017 (2013.01); G03G 21/0058 (2013.01); G03G 21/007 (2013.01); G03G 21/169 (2013.01); B60S 2001/3836 (2013.01); G03G 2215/0805 (2013.01); G03G 2215/0897 (2013.01); G03G 2215/1647 (2013.01); G03G 2215/1652 (2013.01); G03G 2215/1657 (2013.01); G03G 2215/1661 (2013.01); G03G 2221/0068 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cleaning member comprising an elastic member comprising a polyurethane, and the cleaning member cleans a surface of a to-be-cleaned member through contact of at least a part of the elastic member against the surface of the to-be-cleaned member,
wherein in measurement with a temperature range of −20° C. to +60° C. of a loss factor tan δ of a sample sampled from the elastic member so as to include a portion of contact with the to-be-cleaned member,
a peak temperature of a peak denoting a maximum value of tan δ is present at 15.0° C. or below, and a maximum value of tan δ is from 0.20 to 0.55, and
tan δ at a temperature of 55° C. is 0.13 or larger, and
wherein, when the sample sampled from the elastic member so as to include the portion of contact with the to-be-cleaned member is heated and vaporized within an ionization chamber and heated up to 1000° C. at a ramp rate of 10° C./second by using a mass spectrometer of direct sample introduction type which ionizes molecules constituting the sample, with M1 denoting a detected amount of all ions obtained, and M2 denoting a peak integrated intensity in an extracted ion thermogram corresponding to a range of an m/z value derived from a polyfunctional isocyanate having three or more isocyanate groups,
M2/M1 is 0.001 or higher.