Abstract: A biaxially stretched, blow molded bottle made of a resin comprising at least one of polyethylene terephthalate and a copolymerized polyester comprising ethylene terephthalate. The bottle neck is formed, just as the bottle body is formed, by expanding a body of a preform in a shape of a test tube in a stretching step of the molding process. The bottle neck has an average thickness in a range of 0.6 to 1.8 mm, and at the bottle neck, the resin is partially crystallized and is in an oriented crystallized state. A ratio of an absolute value of crystallization enthalpy, ?Hc, to melting enthalpy, ?Hm (|?Hc|/?Hm) of the bottle neck is a value less than 0.1, and a rate of dimensional change in the outer diameter of the bottle neck is 0.2% or less.

Abstract: A biaxially stretched, blow molded bottle made of a resin of the PET series has a bottle neck that is formed by expanding a body of a preform in a shape of a test tube to give the bottle neck a large diameter, just as the preform is expanded to obtain a body of the bottle, in a stretching step of a biaxial stretching and blow molding process. The bottle neck density is set at 1.368 g/cm3 or more or a ratio of an absolute value of crystallization enthalpy, ?Hc, to melting enthalpy, ?Hm, (that is, |?Hc|/?Hm) is set at a value less than 0.1, by meeting a processing condition for stretching in a stretching step and by setting a predetermined mold temperature within a thermally crystallizable range used for the resin of the polyethylene terephthalate series.

Abstract: An electron beam irradiation apparatus includes an electron beam emission section having an electron beam irradiating tube that emits an electron beam; an electron beam irradiation section for irradiating the emitted electron beam to a target; a transfer mechanism for transferring the target to the electron beam irradiation section; a rotation mechanism for rotating the target on its own axis when irradiating the electron beam; and a linear movement mechanism for generating a relative linear movement such that the electron beam irradiating tube passes right above the target, between the target and the electron beam irradiating tube, when irradiating the electron beam. The linear movement mechanism generates a relative linear movement such that the electron beam irradiating tube goes from an end portion of the target toward the center of the target and turns back before the center of the electron beam emitting portion of the electron beam irradiating tube reaches the center of the target.

Abstract: Disclosed is an active energy beam curable inkjet printing ink including a pigment, a compound containing two or more ethylenic double bonds, a compound containing one ethylenic double bond and having a molecular weight of 90 to 210, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1 as a first initiator, and acylphosphine oxides as a second initiator. The ink has low viscosity, excellent photo-polymerizability, remarkably excellent curing property, good dispersion stability, causes no dissolution and swelling of ink contacting materials in a printer, and shows excellent discharge stability from nozzles, an excellent adherence property to a recording medium, excellent solvent resistance and water resistance.

Abstract: Disclosed is an active energy beam curable inkjet printing ink comprising a pigment, a compound containing two or more ethylenic double bonds, a compound containing one ethylenic double bond and having a molecular weight of 90 to 210, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1 as a first initiator, and acylphosphine oxides as a second initiator. The ink has low viscosity, excellent photo-polymerizability, remarkably excellent curing property, good dispersion stability, causes no dissolution and swelling of ink contacting materials in a printer, and shows excellent discharge stability from nozzles, an excellent adherence property to a recording medium, excellent solvent resistance and water resistance.

Abstract: Disclosed is a novel method for ink jet printing on a surface of a substrate made of a synthetic resin, the method comprising the steps of conducting a surface treatment to the surface so as to provide it with a specific surface free energy of 65-72 mJ/m2; providing an activation energy beam-curable ink having a surface tension of 25-40 mN/m; discharging the ink onto the surface with an ink jet printing device thereby forming printed portions of the ink on the surface; and projecting an activation energy beam onto the printed portions. According to the disclosed method, printing articles having desirable image qualities are obtained by achieving a uniform dot diameter of the drop of ink on a synthetic resin substrate by utilizing an ink jet printing process.