Canon Kabushiki Kaisha

Katsuya Tao

Masako Shimomura

An ink jet ink reservoir having a part of its members formed of a polyolefin resin is provided which is free from printing defects caused by filter clogging attributable to a compound derived from an antioxidant. An ink jet ink reservoir used in an ink jet recording apparatus, wherein a part of constituent members of the ink jet ink reservoir is formed of a polyolefin resin, wherein the polyolefin resin contains as additive an antioxidant at least with a hindered phenol skeleton and a phosphorus antioxidant more hydrophobic than bis(2,6-di-t-butylphenyl) pentaerythritol diphosphite (denoted by P-6). The members are free from a phosphorus antioxidant having hydrophobicity equal to or lower than the above P-6.

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Kawasaki, Japan

Katsuya Tao