A New Type of Tackmeter

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Abstract
A new type of tackmeter is described. Strips of the material to be tested are used for tack measurements. The instrument compresses and separates the strips under conditions which can be arbitrarily selected. The tackmeter is of rugged design for simple handling and ease of operation. The test results are recorded on a chart, enabling easy reading of the results. A description of the tackmeter and the testing procedure is given. The accuracy of the measurement is briefly discussed. Among the factors affecting the measurement are the thickness of the sample, compression conditions and aging of the surface. Some test results obtained with factory-made plies and compounds with varying black loadings are given.

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