Surface material for key pad use

PURPOSE: Provided is a surface material for keypads used in various information terminals, which has excellent soft touch feel, does not cause yellowing and maintains physical properties for a long time. CONSTITUTION: The surface material(1) for keypads(2) comprises a thermoplastic polyurethane resi...

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Bibliographische Detailangaben
1. Verfasser:	NAKANO SEISHI ISE NOBURO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS RELAYS SELECTORS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE: Provided is a surface material for keypads used in various information terminals, which has excellent soft touch feel, does not cause yellowing and maintains physical properties for a long time. CONSTITUTION: The surface material(1) for keypads(2) comprises a thermoplastic polyurethane resin prepared at least from a polyol and an isocyanate selected from the group consisting of hexamethylene diisocyanate and hydrogenated diphenylmethane diisocyanate. The polyol includes polycarbonate ester polyol. The thermoplastic polyurethane resin may be present in the form of a film having a thickness of 0.03 mm to 0.5 mm.