Abstract:
An improved process for producing a laminated resin foam composed of two resin foam layers of different characteristic properties wherein the layers are integrally bonded together. A first foamable resin liquid for forming flexible foam is poured into a first space in a foam processing mold on one side of a barrier projecting from the wall of the mold and pouring a second foamable resin liquid for forming a foam less flexible than the first flexible foam into a second space in said foam processing mold on the other side of said barrier. The two foamable resin liquids foam beyond the barrier into contact with each other to form the two laminated foam layers. One improvement in the process includes wetting a substantial portion of the mold cavity with the first foamable resin liquid. Various shapes of molds and barriers will produce different shapes and characteristics of the resultant foam pad, such as for a car seat.
Abstract:
A recording material comprising (i) an addition polymerizable compound having at least one ethylenic unsaturated double bond, (ii) a photopolymerization initiator composition and (iii) at least one component capable of causing a color reaction, wherein components (i), (ii) and (iii) are contained in microcapsules; and wherein said photopolymerization initiator composition (ii) comprises the following components (a), (b) and (c), whereby the light sensitivity of the recording material is improved:(a) a photo-absorbent having a molecular extinction coefficient of 10.sup.3 or more at a maximum absorption wavelength;(b) a hexaaryl-biimidazole; and(c) a heterocyclic mercapto compound of general formula (I): ##STR1## where Z is a non-metallic atomic group for formation of a nitrogen-containing heterocyclic nucleus.
Abstract:
An optical multi/demultiplexer comprising a first waveguide for inputting/outputting light, second and third waveguides which are respectively arranged on both sides of the first waveguide, and first and second open-waveguides which are respectively arranged on sides of the second and third waveguides remote from the first waveguide.
Abstract:
A photopolymerizable composition comprising (A) an addition-polymerizable unsaturated compound having two or more ethylenically unsaturated double bonds and (B) a ternary photopolymerization initiator system, comprising a combination of a 4,4'-bis(dialkylamino)benzophenone represented by the following general formula (I), a carbonyl compound represented by the following general formula (IIa) or (IIb), and a compound having a group represented by the following general formula (III): ##STR1## wherein each R, which may be the same or different, represents an alkyl group, a cycloalkyl group or a hydroxyalkyl group, or may be bonded to another R substituent of the same nitrogen atom to form a tetramethylene group, a pentamethylene group or an oxybisethylene group; ##STR2## wherein X represents a single bond, an oxygen atom, a sulfur atom, a substituted or unsubstituted nitrogen atom or a carbonyl group, R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group, an alkoxy group, a carboxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a halogen atom, and m and n each represents an integer of 0 to 3; ##STR3## wherein R.sup.3 and R.sup.4, which may be the same or different, each represents an alkyl group, an alkoxy group, a carboxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, a cyano group or a halogen atom, p represents an integer of 0 to 5, and q represents an integer of 0 to 4; and--CY.sub.3 (III)wherein Y represents a halogen atom.
Abstract:
A photopolymerizable composition is described, comprising an addition polymerizable unsaturated compound having at least two ethylenically unsaturated double bonds in the molecule, a photopolymerzation initiator, and a binder, said binder being a copolymer composed of at least one recurring unit of group (A), at least one recurring unit of group (B), and at least can recurring unit of group (C), and having a weight average molecular weight of 5,000 to 5,000,000, wherein(A) is a methacrylate or benzyl methacrylate unit having a glass transition point of the homopolymer of higher than 50.degree. C. and having an alkyl group having from 3 to 10 carbon atoms,(B) is an acrylate unit having a glass transition point of the homopolymer of lower than 110.degree. C. and having an alkyl group having from 1 to 6 carbon atoms, and(C) is an .alpha.,.beta.-ethylenically unsaturated carboxylic acid unit, and whereinthe content of the component of group (A) is from 5 to 70 mol %, the content of the component of group (B) is from 5 to 70 mol %, and the content of the component of group (C) is from 20 to 60 mol %, provided that the total content of the components of groups (A), (B) and (C) is 100 mol %.
Abstract:
A photopolymerizable composition which comprises as main ingredients (1) a non-gaseous ethylenic unsaturated compound which has at least two ethylenic unsaturated groups and forms a polymer by the aid of a photopolymerization initiator, (2) a thermoplastic organic polymer binder, (3) a photopolymerization initiator which is activated by activating light, and (4) a derivative of a thiohydrazide compound or at least one derivative of a carbothio acid amide. This composition forms a photoresist for producing printed circuit boards, printing plates, etc., by etching or plating. The photoresist has superior adhesion with respect to the base.
Abstract:
A silver halide sensor type polymerizable light-sensitive material is disclosed. The material is comprised of a support having a silver halide photographic emulsion layer and a polymerizing layer adjacent to the emulsion layer. The polymerizing layer contains a nongaseous ethylenically unsaturated compound capable of undergoing addition polymerization upon reduction of the silver halide with a reducing compound. The material is capable of producing printing plates having good inking property and good printing durability. The material maintains the sensitivity and high resolving power of a silver halide photographic light-sensitive material.
Abstract:
An optical measurement system for eliminating the influences of time variations on light sources, transmission lines, photo detectors, etc. The system includes light sources which generate two pulse-shaped optical signals of different light wavelengths with a portion of the optical signals being transmitted to a measuring part in a distant place by a transmission line. In the measuring part, a change of a measured object is converted into a variation in the quantity of transmission of light, and the optical signal subjected to the variation is transmitted to a signal processing portion by a transmission line. The varied optical signal is converted into a first electric signal by a photo detector. Another portion of the optical signals from the light sources is converted into a second electric signal by another photo detector. A signal processing circuit provides a measurement output indicative of the quantity of change of the measured object as a function of at least one ratio of the first and second electric signals.
Abstract:
A laser-to-fiber coupler is constructed by an optical waveguide arranged between a semiconductor laser and a transmitting optical fiber through which an optical beam emanating from the laser is transmitted in order to reduce the amount of a reflection beam from the optical fiber, which is injected into the active layer of the semiconductor laser.The waveguide is made by an optical fiber of which at least one of core radius or numerical aperture (N.A.) is smaller than those of the transmitting optical fiber.
Abstract:
A mold for continuous casting made of a copper alloy having been subjected to 15 to 40% cold working, said alloy consisting of copper as main constituent and an addition of 0.18 to 0.85% by weight of tin, and, if desired, several other metal components, the alloy having a high softening temperature and high-temperature strength, whose numerical values are given by specific formulas in which the thermal conductivity .lambda. is a determining factor which, in itself, is dependent on the construction of the mold, operating conditions etc.