摘要:
A capacitive measuring device with a measuring electrode (3) arranged some distance from a counter-electrode (8), a dielectric material for analysis is arranged between the electrodes (3, 8), and a measuring current (IC) is supplied to the measuring electrode (3) and the capacitance-dependent capacitor voltage (UC) is measured and evaluated. The measuring electrode (3) is surrounded by a plurality of guard ring and/or auxiliary electrodes (13, 6N, 6NA) spaced apart therefrom in a staggered arrangement and at least partly covering the side walls (18), and each of which is constantly being corrected via a potential-controlling circuit (17) to the potential of the measuring electrode (3), so as to thereby largely eliminates leakage currents to the guard electrodes (13, 6N, 6NA), in the region of the measurement zone the side wall (18) being virtually completely covered with additional guard electrodes (61-6N; 61A-6NA), divided in a ribbon shape parallel to the measuring electrode (3) or divided in a two-dimensional grid, and each of the guard electrodes is wired to its potential-controlling circuit (17) in a manner that minimizes any flow of current into the guard electrodes (61-6N; 61A-6NA).
摘要:
An apparatus for reprocessing special waste of photocrosslinkable scrap material is composed of a housing equipped with a feed hopper, one or more UV emitters arranged in the housing to irradiate the scrap material, and a chopper arranged in the housing to comminute the scrap material by chopping. The apparatus is usefully employed in a method for reprocessing photocrosslinkable scrap material.
摘要:
A method of foaming thermoplastic aromatic polycarbonates is disclosed. Accordingly, a polycarbonate resin is mixed with 0.01 to 10%, the percent being relative to the total weight of polycarbonate resin and polysaccharide, of a particular polysaccharide and the mixture then processed thermoplastically without the application of negative pressure in an extruder, at temperatures of 180.degree. C. to 320.degree. C., or in an injection molding machine, at temperatures of 190.degree. C. to 330.degree. C., to obtain foamed molded articles.
摘要:
A process for the production of polycarbonate foam moldings is disclosed. Accordingly, a composition is prepared comprising mixing a thermoplastic polycarbonate resin and 0.01 to 1 mole-% of a transesterification catalyst anda) 0.1 to 5 mole-% of an aromatic polycarboxylic acid, optionally along with about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxy carboxylic acids and aliphatic polyalcohols, orb) 0.1 to 5 mole-% of H.sub.2 O, optionally along with at about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxycarboxylic acids and an aliphatic alcohols, orc) the additives of said a) and b), ord) 0.1 to 5 mole-% of at least one member selected from the group consisting of diarylcarbonates and oligocarbonates,said percent based in every case on moles aromatic carbonate structural units ##STR1## in which --O--R--O is a diphenolate residue. The composition obtained is processed to foam moldings by injection molding or by extrusion at temperatures of 210.degree. C. to 340.degree. C.
摘要:
A process for producing relief copies wherein the light-hardenable layer of a light-hardenable copying material, which contains a photopolymerizable mixture, a photodimerizable polymeric compound or a diazonium salt polycondensation product, is exposed to a light image, the exposed layer is subjected to a brief ultrasonic treatment, and the unexposed areas of the layer are thereafter washed away by means of a developer. As a result of the ultrasonic treatment, shorter exposure times may be used and better in-depth hardening of the layer may be achieved.
摘要:
Disclosed are a method and apparatus for holographically recording a plurality of holograms on a recording material. The method comprises producing two coherent light beams, altering one of these beams by an information bearing object, causing the changed beam to interfere with the other beam at an angle on the recording material, whereby the interference diagram is recorded, repeating these steps for further pieces of information with a changed recording characteristic obtained by altering the spacial arrangement of the two beams striking the recording material relative to a straight line stationary in the recording material by redirecting at least one beam with stationary optical elements.
摘要:
For applying a label to an article, and with a RFID tag on the label also being separated from the article, and for minimizing the influence from the article on the tag, and for securing stable reading and writing of data, a label application device applies a label to which a RFID tag comprising an IC chip and communication antenna is fixed, to the article. A folding device folds a portion of the label having a tag-fixing area to which the RFID tag is fixed, such that the back side of the label is pushed to the surface side of the label so that the label portion protrudes to form an angle and is folded, and then applying the label to the article. A device acts on the label portion to form the fold.
摘要:
A container made of polycarbonate resin is disclosed. The container is characterized in that the polycarbonate is prepared by the phase interface process that is characterized in that the aqueous solution of an alkali salt of a bisphenol used, contains dissolved oxygen in an amount less than 150 ppb. The process for making the container is also disclosed.
摘要:
A branched polycarbonate resin suitable for making containers is disclosed. The polycarbonate is characterized in that at 260° C. and shear rate of 10 s−1 it has a melt viscosity of 5500 to 900 Pas, and in that at 260° C. and shear rate of 1000 s−1 it has a melt viscosity of 880 tom 1500 Pas, and in that it has a melt flow index (MFR) of 0.1 to 3.0 g/10 min. A container made of the polycarbonate exhibits great breaking strength.
摘要:
The present invention provides the use of impact resistant, stress cracking resistant copolycarbonates with particularly good low temperature properties for applications in which particularly good low temperature properties are required, e.g., for automobile construction or external applications, and new copolycarbonates themselves.