Method and apparatus to identify asbestos and aramid
AssigneeFord Global Technologies, LLC
InventorsGraham Leslie Hearn, John A Amner, Peter John Walker
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Abstract
A method for identifying and/or differentiating between asbestos materials and aramid materials comprises the steps of rubbing an area of a surface of a material (44) to be identified, with an acrylic reference material (28), measuring the polarity of the generated electrostatic charge and comparing the polarity with polarities of charge generated from surfaces of known asbestos and aramid materials.
Claims8
A method for identifying asbestos and aramid materials, the method comprising the steps of:
- rubbing an area of a surface of a material to be identified with an acrylic reference head;
- measuring the polarity of a generated electrostatic charge using an electric field meter sensor electrically isolated from the acrylic reference head by an air gap;
- and
- comparing the measured polarity with polarities of charge generated from surfaces of known asbestos and aramid materials to identify the previously unidentified friction material.
An apparatus for differentiating between asbestos materials and aramid materials, the apparatus comprising:
- a housing provided with a reference material head of an acrylic material;
- and
- means for rubbing the reference material against a sample of unidentified friction material, and a pick-up head for measuring a property of the electrostatic charge produced at the rubbing location;
- characterised in that the pick-up head is part of an electric field meter sensor which measures the polarity of the electrostatic charge and which is electrically isolated from the reference material head by an air gap.
Dependencies are inferred from the claim text.