Method for plasma treatment in hollow bodies

• Main Authors: HOLLAENDER ANDREAS, BEHNISCH JUERGEN
• Format: Patent
• Language: English
• Published: 09.01.2001
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; HUMAN NECESSITIES; HYGIENE; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A method for plasma treatment in hollow bodies includes providing a hollow body which has an opening and which is at least partially flexible; evacuating the hollow body with volume contraction to a first pressure which is preselected such that the hollow body, after evacuating and sealing, experiences a volume expansion in the region of a second pressure, by means of which volume expansion the pressure in the hollow body assumes a value which allows ignition of a non-thermal gas discharge in the hollow body; gas-tight sealing the hollow body while maintaining the first pressure; introducing the hollow body, after evacuating and sealing, into a vacuum chamber; evacuating the vacuum chamber to the second pressure; and igniting a gas discharge in the hollow body after sealing by application of an electrical field.