Hardening a surface of plastics material

A method for hardening a surface 14 of a plastics component 10 comprises softening the surface using carbon dioxide at a pressure of less than 74 bar and introducing a hardening material into the component surface. Typically, a metal alkoxide, e.g. titanium isopropoxide (TiOP) or tetraethoxysilane (...

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Hauptverfasser:	LISA ANN LINDQVIST, GIOVANNI DEL RE, PHILIP VICTOR O'BRIEN, JOSEPH LENNOX PETERS, ANGELA ELIZABETH STEWART, PAOLO PALLADO, MADS RYTTER HEDELIN, JOANNA CATRIN LOVE, MICHAEL HENNESSEY SULLIVAN, JEROEN ANTONIUS ADRAINUS MARIA MOLENSCHOT, LENO MASCIA, ISABELL URDAHL LEIN, STEFANIA BOLOGNA
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON DIAGNOSIS GENERAL PROCESSES OF COMPOUNDING HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS SURGERY THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	A method for hardening a surface 14 of a plastics component 10 comprises softening the surface using carbon dioxide at a pressure of less than 74 bar and introducing a hardening material into the component surface. Typically, a metal alkoxide, e.g. titanium isopropoxide (TiOP) or tetraethoxysilane (TEOS), is used to incorporate a ceramic into the softened component. For example, tetraethoxysilane (TEOS) would form silica domains 20. The carbon dioxide may act as a carrier for the metal alkoxide. A device having one or more surfaces hardened by the method is also disclosed. The device may comprise a lancet (20, Fig. 2) having a tip (22, Fig. 2) and may form part of a blood sugar monitor. A device comprising a plurality of components (52, Fig. 5) in a disc portion (50, Fig. 5), whereby at least component is movable from a rest to an operative position represents another aspect.