Measuring and testing – Coating material: ink adhesive and/or plastic
Patent
1999-06-30
2000-02-22
Williams, Hezron
Measuring and testing
Coating material: ink adhesive and/or plastic
73827, G01B 2108
Patent
active
060266805
ABSTRACT:
A testing system provides a quantitative way of measuring the adhesive strength of adhesives, paints, coatings, adhesive tapes, and other test substances to underlying adherends and substrates, such as metals. The test system of the invention consistently produces uniform results. First and second adherends are bonded together over a relatively small area near the centers and are then pulled apart by a force applied at one end of one of the adherends. The force is increased until the second adherend member is debonded from the first throughout the test bonding zone, thus determining the total energy expended in debonding the first and second adherend members plus strain energy expended in displacing the second member from the first. The force is then decreased until there is no longer any displacement of the second member from the first while concurrently measuring the decreasing force and displacement of the second adherend member from the first adherend member as a function of the decreasing force. This determines the strain energy apart from the total energy. The strain energy is then subtracted from the total energy and the resulting difference is divided by the area of the test bonding zone to determine the specific work of debonding. The strength of the adhesive properties of the test substances, and also the cohesive bonding strength of such substances may be determined utilizing the system of the invention.
REFERENCES:
Specification Sheet for Model TCM1000 and Digital Model TCD1000 Test Stands, John Chatillon & Sons, Inc., 1997.
"Autotest.TM. Software," John Chatillon & Sons, Inc., Spec Sheet 3260/ Jan. '97.
ASTM Standard D 4541--93; Standard Test Method for Pull-off Strength of Coatings Using Portable Adhesion Testors.
Contents; 1992 Annual Book of ASTM Standards vol. 15.06 Adhesives pp. X thru XII.
"Measurement of Adhesion by a Blister Method", Journal of Applied Polymer Science, vol. V, Issue No. 14, pp. 125-134 (1961).
ASTM Standard D 1002--72 (Reapproved 1983) Standard Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal), pp. 47 thru 49.
ASTM Standard D 1781--76 (Reapproved 1986) Standard Method for Climbing Drum Peel Test for Adhesives, pp. 106 thru 109.
ASTM Standard D 3806--79 (Reapproved 1984) Standard Test for Strength Properties of Adhesives in Cleavage Peel by Tension Loading (Engineering Plastics-to-Engineering Plastics), pp. 277 thru 279.
Cygan Michael
Thomas Charles H.
Williams Hezron
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