General Company Limited

Kozo Isobe

Hidehiro Takemoto

An inkjet ink includes a binder resin, a tackifier, a colorant, and an organic solvent. The binder resin is a phenol resin having a softening point in a range from 70 degrees Celsius or more to 125 degrees Celsius or less. The colorant is a dye. The tackifier is a terpene phenol resin whose hydroxyl value is 10 to 45 mgKOH/g.

Inkjet ink

An inkjet ink includes a polyamide resin; at least one tackifier that is selected from the group consisting of a terpene phenol resin and a rosin ester, and that has a hydroxyl value that ranges from 10 to 45 mgKOH/g; a solvent dye; and an alcohol having 1 to 3 carbon atoms. The inkjet ink has quick-drying properties, is capable of satisfactorily improving printing fixability with respect to a non-absorptive printing object made of polyolefin or the like, is excellent in storage stability so that precipitation etc., do not easily occur for a long time, and is excellent in intermittent printability so that the nozzle of an inkjet printer is not easily clogged during a decapping time.

An inkjet ink and a method for printing on hydrophobic media such as offset coated media, using the inkjet ink, including an inkjet containing a pigment, water, a surfactant and 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium.

Inkjet ink and printing method using the same

Disclosed are an inkjet ink and a method for printing on hydrophobic media such as offset coated media using the inkjet ink. Specifically disclosed is an inkjet containing a pigment, water and a surfactant which is characterized by also containing 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium. Such an inkjet ink enables better printing on hydrophobic media such as offset coated media than the conventional inks.

Growing community of inventors

Osaka, Japan

Kozo Isobe