Abstract: The ultraviolet ray irradiation devices are attached to a carriage having a print head that ejects the ultraviolet curable ink, and include a plurality of ultraviolet light sources that irradiate ultraviolet rays onto ink coating ejected on a print sheet by the print head. An ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray onto the print sheet in the vicinity of the print head has a wavelength shorter than an ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray onto the print sheet apart from the vicinity of the print head along the moving direction of the carriage. The ultraviolet ray irradiation device is capable of sufficiently curing a plurality of ultraviolet curable ink adhered on a recording medium without incurring a problem of blurring or color mixing for a multiple-color printing process such as a full-color printing process.

Abstract: Ultraviolet ray irradiation devices are attached to a carriage having a print head that ejects ultraviolet curable ink, and include a plurality of ultraviolet light sources and that irradiate ultraviolet rays onto an ink coating ejected on a print sheet by a print head. An ultraviolet ray that is irradiated onto the print sheet in the vicinity of the print head has a wavelength longer than an ultraviolet ray that is irradiated onto the print sheet apart from the vicinity of the print head along the moving direction of the carriage. The ultraviolet ray irradiation devices are capable of sufficiently curing ultraviolet curable ink without the problem of only the surface of the ink being cured in a print process (for example, a monochrome print process) when the ink coating adhered to the recording medium is relatively thick.

Abstract: A photo curable ink composition set, comprising: an ink composition A that includes at least a color material, a polymerizable compound, and a radical polymerization photoinitiator; and an ink composition B that includes at least a radical polymerizable compound and does not include the color material and the radical polymerization photoinitiator, wherein the ink composition A and/or B includes a sensitizer.

Abstract: A composition is disclosed having a matte surface and high optical transmission characteristics. The composition comprises a polycarbonate and refractive index compatible polymer particles such as crosslinked polystyrene. The polycarbonate composition is useful for manufacture of anti-glare lenses, ATM screens, decorative articles, and housings for electronic appliances such as a computer.

Abstract: Ultraviolet-ray irradiation devices are attached to a carriage having a print head that ejects ultraviolet curable ink, and include a plurality of ultraviolet light sources and that irradiate ultraviolet rays onto an ink coating ejected on a print sheet by a print head. An ultraviolet ray that is irradiated onto the print sheet in the vicinity of the print head has a wavelength longer than an ultraviolet ray that is irradiated onto the print sheet apart from the vicinity of the print head along the moving direction of the carriage. The ultraviolet ray irradiation devices are capable of sufficiently curing ultraviolet curable ink without the problem of only the surface of the ink being cured in a print process (for example a monochrome print process) when the ink coating adhered to the recording medium is relatively thick.

Abstract: The ultraviolet ray irradiation devices are attached to a carriage having a print head that ejects the ultraviolet curable ink, and include a plurality of ultraviolet light sources that irradiate ultraviolet rays onto ink coating ejected on a print sheet by the print head. An ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray onto the print sheet in the vicinity of the print head has a wavelength shorter than an ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray onto the print sheet apart from the vicinity of the print head along the moving direction of the carriage. The ultraviolet ray irradiation device is capable of sufficiently curing a plurality of ultraviolet curable ink adhered on a recording medium without incurring a problem of blurring or color mixing for a multiple-color printing process such as a full-color printing process.

Abstract: A photo curable ink composition set, comprising: an ink composition A that includes at least a color material, a polymerizable compound, and a radical polymerization photoinitiator; and an ink composition B that includes at least a radical polymerizable compound and does not include the color material and the radical polymerization photoinitiator, wherein the ink composition A and/or B includes a sensitizer.

Abstract: A composition is disclosed having a matte surface and high optical transmission characteristics. The composition comprises a polycarbonate and refractive index compatible polymer particles such as crosslinked polystyrene. The polycarbonate composition is useful for manufacture of anti-glare lenses, ATM screens, decorative articles, and housings for electronic appliances such as a computer.

Abstract: A method of recycling fusible polycondensation resin waste in a fusion polymerization apparatus is disclosed. The method of recycling polycondensation resins comprises adding polycondensation resin waste directly to a fusion polymerization apparatus to carry out the polycondensation reaction. The polycondensation resin waste may be supplied from any point of the polycondensation apparatus to carry out the exchange reaction and/or the polycondensation reaction between the resin being prepared in the apparatus and the resin waste supplied. The method may be carried out in a continuous fusion polycondensation system with more than one polymerization reactor connected in series.

Abstract: This specification describes an optical polycarbonate composition obtained by the melt polycondensation of a bisphenol and a carbonic diester in the presence of an alkaline compound catalyst, wherein said optical polycarbonate composition comprises (i) a compound expressed by the following Formula [A] in an amount of 30 to 2000 ppm; (ii) a compound expressed by the following Formula [B] in an amount of 30 to 4000 ppm; and (iii) a compound expressed by the following Formula [C] in an amount of 80 to 8000 ppm. The polycarbonate composition has a viscosity average molecular weight of between 12,000 and 18,000, and the portion with a molecular weight (as measured by GPC) of 1000 or less accounts for 0.5 to 1.5 wt %.

Abstract: This specification discloses polycarbonates for optical use. These polycarbonates are prepared by reacting a bisphenol and carbonic diester in the presence of an alkaline compound catalyst. These polycarbonates have: (i) an intrinsic viscosity (IV) as determined at 20° C. in methylene chloride of between 0.34 and 0.38; (ii) a glass transition temperature (Tg) as determined by DSC of between 143 and 147° C.; and (iii) an intrinsic viscosity (IV) and glass transition temperature (Tg) ratio complying with the following general formula (A): IV×95.888+107.9<Tg<IV×95.888+113.

Abstract: A method of recycling fusible polycondensation resin waste in a fusion polymerization apparatus is disclosed. The method of recycling polycondensation resins comprises adding polycondensation resin waste directly to a fusion polymerization apparatus to carry out the polycondensation reaction. The polycondensation resin waste may be supplied from any point of the polycondensation apparatus to carry out the exchange reaction and/or the polycondensation reaction between the resin being prepared in the apparatus and the resin waste supplied. The method may be carried out in a continuous fusion polycondensation system with more than one polymerization reactor connected in series.

Abstract: This specification describes an optical polycarbonate composition obtained by the melt polycondensation of a bisphenol and a carbonic diester in the presence of an alkaline compound catalyst, wherein said optical polycarbonate composition comprises (i) a compound expressed by the following Formula [A] in an amount of 30 to 2000 ppm; (ii) a compound expressed by the following Formula [B] in an amount of 30 to 4000 ppm; and (iii) a compound expressed by the following Formula [C] in an amount of 80 to 8000 ppm. The polycarbonate composition has a viscosity average molecular weight of between 12,000 and 18,000, and the portion with a molecular weight (as measured by GPC) of 1000 or less accounts for 0.5 to 1.5 wt %.

Abstract: This specification discloses polycarbonates for optical use. These polycarbonates are prepared by reacting a bisphenol and carbonic diester in the presence of an alkaline compound catalyst.

Abstract: The present invention provides a method for making a polycarbonate composition. The polycarbonate is prepared by melt synthesis using a sulfur-containing acid compound to at least partially quench the melt catalyst. The polycarbonate composition comprises said polycarbonate, phosphorous acid, further sulfur-containing acid compound and an ester derived from a mono-fatty acid and a polyhydric alcohol.

Abstract: It has been discovered that the shape of a resin pellet can be controlled to reduce cycle time of an injection molding machine and improve the yield by narrowing variability in the plasticizing time.

Abstract: The present invention provides a method for making a polycarbonate composition. The polycarbonate is prepared by melt synthesis using a sulfur-containing acid compound to at least partially quench the melt catalyst. The polycarbonate composition comprises said polycarbonate, phosphorous acid, further sulfur-containing acid compound and an ester derived from a mono-fatty acid and a polyhydric alcohol.

Abstract: A polycarbonate production method, characterized in that a dihydroxy compound and a carbonic acid diester are subjected to melt polycondensation in the presence of a catalyst containing an alkali metal compound and/or alkaline-earth metal compound in an amount of 1×10−8 to 1×10−5 mol per mole of dihydroxy compound; wherein a sulfonic acid ester compound and a transition metal scavenger are also added to the reaction product; and wherein the polycarbonate is treated at a reduced pressure.

Abstract: The present invention provides a method for making a polycarbonate composition. The polycarbonate is prepared by melt synthesis using a sulfur-containing acid compound to at least partially quench the melt catalyst. The polycarbonate composition comprises said polycarbonate, phosphorous acid, further sulfur-containing acid compound and an ester derived from a mono-fatty acid and a polyhydric alcohol.

Abstract: Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.