E.i. Dupont De Nemours and Company

U S Coatings IP Co LLC

Li Lin

Melvin H Johnson

James Lamonte Adams

The present invention is directed to a method for measuring sandability of a coating or an article. This invention is particularly directed to a method for measuring sandability of a coating or an article quantitatively by measuring weight loss of said coating or article after being sanded. This invention is also directed to a system for measuring sandability of a coating or an article using said method.

Method for measuring sandability of coating and the use thereof

This invention is directed to the measurement of stress-strain relationships in thin films using substantially flat, parallel test surfaces with minimal width. This invention is further directed to the measurement of stress-strain relationships in thin films at controlled temperatures and at high strain rates above 100% per second.

Mechanical property measurement of thin films by micro plane-strain compression

This invention concerns a test apparatus and procedure used for quantitative and qualitative characterization of scratch and mar behavior of films or coatings, more particularly automotive coatings. The apparatus includes a micro-indentor that penetrates and scratches the coating to be characterized together with interrelated components for measuring the force applied, the length and depth of the indentor penetration, the geometry of the disturbed coating surface as well as a system for measuring, analyzing and comparing test results.

Test apparatus and method of measuring mar resistance of film or coating

Measurement of stress-strain relationships in thin films using substantially flat, parallel test surfaces with minimal width.

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Wallingford, PA, United States of America

Li Lin