摘要:
Disclosure of an electrode arrangement (1) as high voltage electrode for continual plasma treatment or plasma coating of web material with several knife electrodes (3) arranged at a right angle to any transport direction of the web material and essentially located parallely to each other which is characterized by the fact that the distances (a−e) of adjacent knife electrodes (3) vary. In tests it has turned out that a more uniform coating result or, respectively, treatment result can be achieved with such an electrode arrangement than with comparable arrangements in which the knife electrodes are arranged equidistant. Preferably, the distances (a) between adjacent knife electrodes (3) are larger at the edges of the electrode arrangement (1) than the distances (e) between adjacent knife electrodes (3) in its center.
摘要:
A device for corona treatment of electrically insulating plastic films has a counter electrode across which a plastic film to be treated is guided and a high-voltage electrode extending transversely to a travel direction of the plastic film. The high-voltage electrode has several electrode segments extending in the travel direction of the plastic film to be treated. The electrode segments are arranged to be pivotable transversely to the travel direction out of a treatment area. Discharge edges of the electrode segments are divided into individual discharge tongues spaced apart from one another in the travel direction of the plastic film and project in a direction toward the plastic film. The discharge tongues of adjacently positioned electrode segments are staggered relative to one another in the travel direction of the plastic film such that the discharge tongues are positioned tongue on gap.
摘要:
A method for continuous atmospheric plasma treatment of an electrically insulating workpiece. The workpiece is arranged at a distance beneath at least one high-voltage electrode which extends across a direction of movement. The electrode and the workpiece are set in motion relative to one another. The high voltage being applied to the high-voltage electrode, preferably is in the form of an AC voltage. A first space situated between the high-voltage electrode and the workpiece is filled with a first atmosphere and a second space on the side of the workpiece facing away from the high-voltage electrode is filled with a second atmosphere that is different from the first atmosphere. The second space is adjacent to a back side of the workpiece. The choice of high voltage and of the first and second atmospheres is made in such a way that a plasma discharge is ignited in the second atmosphere.
摘要:
The invention relates to a method for treating plasma under continuous atmospheric pressure of, in particular, electrically insulating workpieces, in particular material plates or strips. According to said method, the workpiece which is to be machined, is arranged at a distance below at least one electrode which is made of two barrier electrodes, which are arranged in a successive manner in the direction of displacement with a gap, and which extends in a manner which is transversal to the direction of displacement at least over the width of the surface of the workpiece which is to be machined. The electrode and the workpiece are mutually offset in the direction of displacement. High voltage, which is in the form of an alternating voltage, is applied to the barrier electrodes, in order to provoke at least plasma discharge in the gap. The plasma discharge is driven by the gas flow from the gap in the direction of the surface of the workpiece which is to be machined. The invention is characterised in that the surfaces of the barrier electrodes which are oriented towards the surface of the workpiece which is to be machined are impinged upon with high pressure.
摘要:
The present invention provides a method with which a workpiece can be subjected to an atmospheric-pressure plasma treatment and/or plasma discharge on a side facing away from the high-voltage electrodes inducing the plasma discharge.This is a method for continuous atmospheric-pressure plasma treatment and/or plasma coating of electrically insulated workpieces, in particular boards or sheets of material in which a workpiece to be treated is arranged at a distance beneath at least one high-voltage electrode extending across the direction of movement over at least the width of the surface of the workpiece to be treated, and the electrode and the workpiece are set in motion in relation to one another in a direction of movement, a high voltage being applied to the high-voltage electrode, preferably in the form of an a.c. voltage, which is characterized in that a first space situated between the high-voltage electrode and the workpiece is filled with a first atmosphere and a second space on the side of the workpiece facing away from the high-voltage electrode is filled with a second atmosphere that is different from the first atmosphere, said space being adjacent to the back side of the workpiece, the choice of high voltage and of the first and second atmospheres being made in such a way that a plasma discharge is ignited in the second atmosphere.
摘要:
Disclosure of an electrode arrangement (1) as high voltage electrode for continual plasma treatment or plasma coating of web material with several knife electrodes (3) arranged at a right angle to any transport direction of the web material and essentially located parallely to each other which is characterized by the fact that the distances (a−e) of adjacent knife electrodes (3) vary. In tests it has turned out that a more uniform coating result or, respectively, treatment result can be achieved with such an electrode arrangement than with comparable arrangements in which the knife electrodes are arranged equidistant. Preferably, the distances (a) between adjacent knife electrodes (3) are larger at the edges of the electrode arrangement (1) than the distances (e) between adjacent knife electrodes (3) in its center.
摘要:
A device for laminating two different foils in vacuo with the aid of an electrical gas discharge has two separate treatment chambers or areas, in which different vacuo can be set, so that the treatment can be adjusted in accordance with the corresponding foil, i.e. it can be performed in an optimum manner in accordance with the physical and chemical characteristics of the foil. The electrical gas discharge is a plasma discharge, i.e. a low energy gas discharge in vacuo. Advantageously, the electrodes can be operated at different power levels in the individual, separate treatment areas. For adapting the atmosphere in the treatment areas to the foil characteristics, it is also possible to introduce different gases and optionally carry out an additional heat treatment.
摘要:
The application of CORONA discharge is proposed in continuous and semi-continuous processes for the finishing of cotton, flax, cotton/flax blends or other cellulosic materials, either in form of yarns, woven or knitted fabrics, in order to obtain complete hidrophilization and an increase of reticulation potential. The goal is to achieve easier and uniform wetting and impregnation with treatment products and an improved adhesion of resins and binders. The operations where CORONA discharge is included are desizing, alkaline treatment, bleaching, caustification, mercerization, dyeing, printing and final finishing treatments, namely softening, hydrophilization, easy-care, anti-shrinkage and fireproofing. Discharge is continuously applied in open width materials with controlled humidity and temperature, in the stages of raw, desized, bleached or finished. The materials moves with controllable velocity on a counter-electrode roll positioned at a small distance of an electrode, which is designed to produce a high voltage discharge in completely uniform conditions.
摘要:
A barrier electrode for the treatment of surfaces of electronically conductive or non-conductive materials with medium frequency electric discharges and a barrier electrode arrangement with one or more such barrier electrodes, wherein the barrier electrode is constructed as a tube of dielectric material with two ducts extending parallel to each other in the longitudinal direction of the tube. The duct which in the position of use faces the counter electrode is provided with a high voltage conductor and the other duct serves for supplying a temperature-influencing medium or a process gas.
摘要:
A device for creating a deposit of silicon oxide on a traveling solid substrate, wherein the substrate is subjected to an electrical discharge with a dielectric barrier in the presence of a controlled atmosphere containing a silane and an oxidizing gas, the atmosphere being at a pressure higher than 10,000 Pa, and wherein the atmosphere is maintained in the immediate vicinity of an electrode in the region where the electrical discharge is produced and further wherein any entrainment of oxygen other than that forming part of the atmosphere in the region is prevented.