Transparent molded plastic article having a surfactant layer

• US 20030072944A1
• Filed: 10/16/2002
• Published: 04/17/2003
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Hiraiwa, Takashi
• Granted Patent: US 6,827,991 B2
• Time in Patent Office: Days
• US Class Current: 428/411.1
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: Y10S 428/922 Static electricity metal bleed-off metallic stock
• CPC Class Codes: Y10S 428/924 Composite
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

A transparent molded plastic article, which is used for, for example, a component of an auto instrument, includes a transparent molded plastic body and a surfactant layer, which is located on a surface of the plastic body. The surfactant layer contains a quaternary ammonium salt having a mean molecular weight of 260 to 385 to eliminate static electricity of the plastic body. Therefore, the transparent molded plastic article is substantially static-electricity-free while the deterioration in transparency of the surfactant is prevented.

Claims

1. A transparent molded plastic article comprising:

a transparent molded plastic body; and

a surfactant layer, which is located on a surface of the transparent molded plastic body, wherein the surfactant layer contains a quaternary ammonium salt having a mean molecular weight of 260 to 385 to eliminate static electricity of the plastic body.

2. The transparent molded plastic article in claim 1, wherein the transparent molded plastic article is a meter display-panel cover of an auto instrument.

3. The transparent molded plastic article in claim 1, wherein the transparent molded plastic article is a meter dial of an auto instrument.

4. The transparent molded plastic article in claim 1, wherein the transparent molded plastic article is a meter display panel of an auto instrument.