Dainippon Ink and Chemicals, Incorporated

Hiroshi Fukutomi

Isao Tabayashi

Hiroshi Harada

Sadahiro Inoue

Kazuo Murakami

Shoei Ebisawa

Hiromi Soma

The present invention relates to a method for bonding together two disc substrates, at least one disc substrate having a UV transmissive-visible light reflective information recording layer provided on a UV transmission base. In this method, the disc substrates are bonded together, so that the information recording layer of one disc substrate faces the other disc substrate, by employing UV irradiation to cure a UV curable composition used as a bonding agent. In the case of the present invention, to cure the bonding agent, UV is irradiated in a single or repeating flash so as not to impair the information recording layer. As a result, the bonding agent can be cured in a shorter period of time with less energy consumed as compared to the conventional method of using conditions irradiation of UV light to cure a UV curable composition used as a bonding agent. Accordingly, the present method enables a product disc to be obtained in a shorter time, with less energy used, so that productivity (i.e., number of bondings per unit time) is improved.

Disc bonding method

The present invention relates to a method for bonding together two disc substrates, at least one disc substrate having a UV transmissive-visible light reflective information recording layer provided on a UV transmissive base. In this method, the disc substrates are bonded together, so that the information recording layer of one disc substrate faces the other disc substrate, by employing UV irradiation to cure a UV curable composition used as a bonding agent. In the case of the present invention, to cure the bonding agent, UV is irradiated in a single or repeating flash so as not to impair the information recording layer. As a result, the bonding agent can be cured in a shorter period of time with less energy consumed as compared to the conventional method of using continuous irradiation of UV light to cure a UV curable composition used as a bonding agent. Accordingly, the present method enables a product disc to be obtained in a shorter time, with less energy used, so that productivity (i.e., number of bondings per unit time) is improved.

Disc bonding method and device therefor

An organic solvent-based ink composition for ink jet printer comprises a dye or dyes dissolved in a mixed solvent of a good solvent and a poor solvent, wherein

Ink composition

An organic solvent-based ink for ink-jet printer comprises at least one compound selected from the group consisting of an aromatic sulfonamide and a hydroxybenzoic acid ester and an oil-soluble dye dissolved in an organic solvent.

Organic solvent-based ink for ink-jet printer

A hot-melt type ink for thermal ink-jet printers comprises an oil-soluble dye dissolved in at least one compound selected from the group consisting of a phosphoric acid ester, an aromatic sulfonamide, a hydroxybenzoic acid ester and a phthalic acid ester, the compound being in solid state at room temperature.

Hot-melt type ink for thermal ink-jet printer

Ink for use in an ink-jet printer, said ink comprising a solution in water of a water-soluble dye, a wetting agent and a compound of the following formula ##STR1## wherein R represents --C.sub.m H.sub.2m+1 or --O--C.sub.m H.sub.2m+1, m represents O or an integer of 1 to 6, and n represents an integer of 1 to 10.

Growing community of inventors

Urawa, Japan

Hiroshi Fukutomi