摘要:
A process of controlling the thickness profile of a blown tubular film, consisting of thermoplastic plastics, around the circumference of same when producing blown film by means of blown film extruders, having a film extrusion die, wherein a measuring device measures the film thickness of the tubular film around the circumference and wherein a control device variably controls the cooling gas flow as a function of the measured film thicknesses around the circumference in sectors, wherein cooling gas flows are supplied from the outside in the direction of production in two separate planes, and wherein the cooling gas flows are controlled variably and in circumferential sectors around the circumference in the two planes in respect of their physical parameters.
摘要:
A process for the manufacture of a thermoplastic blown film is disclosed. The process includes the step of extruding a blown film tube of a thermoplastic material. The outside surface of the film tube is treated with a cooling gas to solidify the film tube. This cooling gas is directed to the tube from an annular ring around the tube and the cooling gas is directed at the tube in a flow direction parallel to a wall of the film tube. The cooling gas is drawn off the tube by means of a suction ring positioned around the tube prior to flattening the tube to form a film.
摘要:
A method of cooling blown film consisting of thermoplastic plastics during the production of blown film by means of a blown film extruder with a film blowing head which comprises an annular nozzle from which the blown film emerges and is guided away in an extraction direction, wherein at least two cooling gas flows are made to approach the blown film from the outside in at least two blowing-out planes located at a distance from the annular nozzle, wherein at least one cooling gas flow KG is blown out in the direction opposed to the extraction direction of the blown film and wherein at least one cooling gas flow KA is blown out in the extraction direction of the blown film, and wherein, at least one of the cooling gas flows KG, KA can be controlled around their circumference in sectors, at least in respect of its volume flow or temperature.
摘要:
A process and apparatus for separation of solvents from an air stream laden with solvent vapors by adsorption using active carbon followed by regeneration of the carbon by desorption by steam using a plurality of active carbon chambers. The sequence of charging and regeneration of the active carbon is controlled automatically in dependence upon the concentration of solvent vapors in the air stream. During the change over from charging to regeneration the active carbon is first subjected to desorption by steaming with a large volume of steam and then, when steam breaks through on the outlet side of the carbon the volume of steam is reduced for the purpose of drying the carbon. The change over is effected by a measuring device arranged on the outlet side of the carbon chamber responsive to a pre-determined threshold concentration of solvent vapors in the outgoing stream.
摘要:
A method of cooling blown film consisting of thermoplastic plastics during the production of blown film by means of a blown film extruder with a film blowing head which comprises an annular nozzle from which the blown film emerges and is guided away in an extraction direction, wherein at least two cooling gas flows are made to approach the blown film from the outside in at least two blowing-out planes located at a distance from the annular nozzle, wherein at least one cooling gas flow KG is blown out in the direction opposed to the extraction direction of the blown film and wherein at least one cooling gas flow KA is blown out in the extraction direction of the blown film, and wherein, at least one of the cooling gas flows KG, KA can be controlled around their circumference in sectors, at least in respect of its volume flow or temperature.
摘要:
A compound of formula (I), or a pharmaceutically acceptable salt thereof, ##STR1## in which, R.sub.1 is hydrogen, lower alkyl or CH.sub.2 OR.sub.6 ;R.sub.2 is hydrogen or lower alkyl;R.sub.3 is hydrogen or lower alkyl;each of W and Z, which are different, represents --CR.sub.4 R.sub.5 -- or --(CR.sub.x R.sub.y).sub.n --, in which,R.sub.4 is hydrogen, C.sub.1-3 alkyl, C.sub.1-3 alkylthio or C.sub.1-3 alkoxy;R.sub.5 is C.sub.1-3 alkyl, C.sub.1-3 alkylthio or C.sub.1-3 alkoxy; or together R.sub.4 and R.sub.5 form a 3 to 6 membered carbocyclic ring, or a heterocyclic ring containing one or two ring oxygen, nitrogen or sulphur atoms;or R.sub.4 and R.sub.5 together form an oxo or methylene group;each of R.sub.x and R.sub.y is hydrogen or C.sub.1-3 alkyl; n is zero or 1;R.sub.6 is hydrogen, lower alkyl, lower alkylcarbonyl, arylcarbonyl, aralkylcarbonyl, heteroarylcarbonyl, optionally substituted aminocarbonyl, lower alkoxycarbonyl and aryloxycarbonyl;R.sub.7 is hydrogen or lower alkyl;X is oxygen or sulphur;and A is sulphur, oxygen or --NH--, is useful for the treatment of heart disease.
摘要:
A take-off apparatus for plastic blown sheet that is collapsed has a deflecting roller rotatably mounted for transporting the blown sheet and an air turning bar for receiving the blown sheet from the deflecting bar along a transport plane defined therebetween. The blown sheet passes around a peripheral portion of the air turning bar thereby defining a support arc region of the at least one air turning bar about which the blown sheet is supported. The air turning bar has air outlet openings disposed in the support arc region through which compressed air is ejected to support the blown sheet. The air turning bar has an arc-shaped axis defining a plane of curvature which is oriented such that the peripheral portion presents a concave surface in which the air outlet openings are disposed and which opposes the blown sheet.
摘要:
The present invention concerns a method for the stabilization of proteins in an aqueous solution which is characterized in that one or several members of the heat shock protein (Hsp90) family are added to the aqueous solution containing protein.
摘要:
The invention relates to a spacer textile (1) including a top textile (2), a bottom textile (3) and a spacer layer (5), wherein the top textile (2) and the bottom textile (3) are connected together by the spacer layer (5). The top textile (2), the bottom textile (3) and the spacer layer (5) are monofilament fibers from inert fluorocarbons. The invention relates additionally to the use of the spacer textile (1) according to the invention as at least in part sheathing of an electrode (13, 14) in an electroplating bath (11), as a lining of operating, bearing and/or transport surfaces (31), or as filter or support material in chemically aggressive media.
摘要:
A compound of formula (I) or a pharmaceutically acceptable salt thereof, ##STR1## in which, R.sub.1 is hydrogen or lower alkyl;R.sub.2 is hydrogen or lower alkyl;R.sub.4 and R.sub.4 ' together form a group .dbd.N--Ra, or .dbd.CRaRb, where Ra is hydrogen, lower alkyl, aryl, aryloxy, lower alkylcarbonyl, arylcarbonyl, aryloxycarbonyl, lower alkoxy, lower alkoxy carbonyl, lower alkoxy carbonyl alkoxy, lower thioalkoxy, hydroxy, nitrile, heterocyclyl, or --NRcRd, where Rc is hydrogen, lower alkyl, cycloalkyl, aryl, aralkyl, lower alkylcarbonyl, arylcarbonyl, aminocarbonyl, aminothiocarbonyl, aminoiminocarbonyl, lower alkoxycarbonyl, lower alkoxythiocarbonyl, aryloxycarbonyl, thiocarbonyl, nitrile, carboxyl, heterocyclyl or heterocyclylcarbonyl, and Rd is hydrogen or lower alkyl; Rb is hydrogen, lower alkyl, aryl, lower alkylcarbonyl, lower alkoxycarbonyl, nitrile or nitro;or R.sub.4 is --NH--Ra, in which Ra is as defined above, and R.sub.4 ' is hydrogen or lower alkyl;each of R.sub.3 and R.sub.5 is independently hydrogen, lower alkyl, aryl, lower alkylcarbonyl, arylcarbonyl, aralkylcarbonyl, heterocyclylcarbonyl, optionally substituted aminocarbonyl, lower alkoxycarbonyl or aryloxycarbonyl;R.sub.6 is hydrogen, lower alkyl or halogen; and A is sulphur, oxygen, --NH-- or --CH.sub.2 --, is useful for the treatment of heart disease.