Anti-static material and method of making the material

In combination for eliminating static charges by providing a resistivity in the range of approximately 10.sup.11 to 10.sup.12,

• a thermoplastic material selected from a group consisting of a polystyrene and a modified styrene where the polystyrene is selected from a group consisting of the crystal and high impact type and the modified styrene is selected from a group consisting of a vacuum-forming grade with an index of approximately 2.2 and a low melting temperature and a foaming grade with an index of approximately 2.6 and an increased melting temperature, and
• an ethoxylated amine mixed in the thermoplastic material in the range of approximately four percent (4%) to twelve percent (12%) by weight.

A method of making anti-static material having a resistivity in the range of approximately 10.sup.11 to 10.sup.12 ohms, including the following steps:

• providing a thermoplastic material selected from a group consisting of polystyrene and a modified styrene,
• mixing the thermoplastic material and an ethoxylated amine in a range of approximately four percent (4%) to twelve percent (12% ) by weight, and
• extruding the mixture of the thermoplastic material and the ethoxylated amine at a controlled temperature below approximately 450.degree. F. and a controlled pressure below approximately 1,000 psi and a controlled dwell time below approximately three (3) minutes.