Patent ID: 6050139
Filing Date: 2000-04-18
Classification: G01N

Abstract:
A method of testing tack properties of a coating on a substrate comprising:(a) providing a substrate;(b) applying a coating sample to a portion of the substrate, said coating sample on said substrate exhibiting local variations in tack;(c) contacting the portion of the substrate with a probe having a contact area of less than 20 mm.sup.2, the surface area of the probe being smaller than the scale of local variations in tack of the coating sample;(d) removing the probe from the coated portion;(e) measuring a parameter relating to the movement of the probe as it is being removed, to determine the tack of the coating sample; and(f) repeating steps (c)-(e) to measure the change in tackiness as a function of time and the tack uniformity of the coating sample.