摘要:
Disclosed is a process of preparing a planographic printing plate from a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, an image formation layer containing (A) at least one polymerization initiator selected from an arene-iron complex and a tribromoacetyl compound, (B) a polymerizable ethylenically unsaturated compound, and (C) an alkali soluble resin with an acid value of 5 to 200, the process comprising the steps of imagewise exposing the light sensitive planographic printing plate material to ultraviolet laser, and removing an image formation layer at non-exposed portions with an aqueous alkali solution to form an image.
摘要:
A piezoelectric speaker is a piezoelectric speaker which radiates acoustic waves by vibrating according to an applied voltage, including (i) a substrate which includes a first region having first bending stiffness against bending of a plane perpendicular to a vibration direction and a second region having second bending stiffness against bending of the perpendicular plane, the second bending stiffness being different from the first bending stiffness, (ii) a first piezoelectric element which is mounted on the first region and to which a voltage of a first frequency band is applied, and (iii) a second piezoelectric element which is mounted on the second region and to which a voltage of a second frequency band different from the first frequency band is applied.
摘要:
A piezoelectric speaker includes: a chassis having a wall surface including an opening; a plurality of diaphragms including at least a first piezoelectric diaphragm and second piezoelectric diaphragms which vibrate in phases opposite to each other when a voltage is applied; and a joint member which connects the first and second piezoelectric diaphragms in a positional relationship such that the diaphragms are located at positions different from each other in a thickness direction. One of the diaphragms is provided, in the opening of the chassis, to have one surface facing an outside of the chassis and another surface facing an inside of the chassis. The diaphragm functions as a radiation plate which radiates a sound wave by vibrating at an amplitude generated by synthesizing amplitudes of the first and second piezoelectric diaphragms.
摘要:
A piezoelectric type loudspeaker, which achieves both space-saving and high sound quality without increasing the number of parts, is provided. In order to achieve this, the present invention includes: a piezoelectric element constructed of a piezoelectric material interposed between two surface electrodes; and a diaphragm of which at least one principal surface is provided with a print wiring and at least one principal surface is bonded to the piezoelectric element, and the diaphragm includes: a frame section; a vibrating section which is bonded with the piezoelectric element, and which vibrates; and at least one supporting section which connects the frame section and the vibrating section, and which supports the vibrating section, and either the frame section or the at least one supporting section includes at least one electrical resistance which is integrally formed to the print wiring, and which constructs, in combination with the piezoelectric element, a series-RC circuit.
摘要:
The present invention provides a light sensitive planographic printing plate material which is suitable for exposure employing a laser emitting light with an emission wavelength of from 350 to 450 nm, and which exhibits high sensitivity and storage stability, as well as excellent safelight property. The light sensitive planographic printing plate material comprises a support and provided thereon, a light sensitive layer containing a photopolymerization initiator (A), a polymerizable ethylenically unsaturated compound (B), a dye (C) having absorption maximum in the wavelength regions of from 350 to 450 nm, and a polymeric binder (D), characterized in that the light sensitive layer contains a compound represented by the following formula (1) as the photopolymerization initiator (A),
摘要:
Disclosed is a light sensitive planographic printing plate material comprising a support and provided thereon, a light sensitive layer containing a polymerization initiator, a polymerizable ethylenically unsaturated compound, a polymeric binder, and a sensitizing dye, wherein the sensitizing dye is represented by formula (1),
摘要:
Disclosed is a light sensitive composition comprising an addition polymerizable ethylenically unsaturated monomer A), a photopolymerization initiator B), a polymer binder C), and a cation-polymerization compound D), wherein the photopolymerization initiator D) is an iron-arene complex.
摘要:
A photosensitive composition exhibiting enhanced sensitivity is disclosed, comprising an ethylenically unsaturated monomer, a photopolymerization initiator composition and a polymer binder, wherein the photopolymerization initiator composition contains a polyhalogen compound. There is also disclosed a photosensitive lithographic printing plate comprising the foregoing photosensitive composition on a support having a hydrophilic surface.
摘要:
A photosensitive composition containing: (A) a sensitizing dye; (B) a photopolymerization initiator; (c) a polymerizable compound having an ethylenically unsaturated bond; and (D) a polymer binder, wherein the photopolymerization initiator exhibits a reaction rate constant with a semiquinone radical anion in the range of 2.0×102 to 1.0×108 (mol−1·l·s−1).
摘要:
Disclosed are a planographic printing plate material and a planographic printing plate preparing process, the planographic printing plate material comprising a support and provided thereon, an image formation layer containing a colorant (a) having an absorption band in a wavelength region of from 700 to 1200 nm, a polymerization initiator (b) and a polymerizable ethylentically unsaturated compound (c), wherein the polymerization initiator (c) is a compound represented by the following formula (1), R1—CX2—(C═O)—R2 Formula (1)