Loop Tack Fixture ASTM D6195 - G1098 - Mark-10

Loop Tack Fixture ASTM D - G - Mark-10

Accuracy

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Mark-10 specifies accuracy in relation to the overall scale of the measurement device. To ascertain the measurement error as an actual load, multiply the accuracy percentage by the capacity of the instrument.

Example 1 ' M5-50 force gauge:

The accuracy is ±0.1% of full scale (FS). For instance, multiplying ±0.1% by 50 lbF results in ±0.05 lbF. Consequently, any displayed measurement may deviate by as much as 0.05 lbF. For example, should the displayed value be 30.00 lbF, the actual reading would range between ±29.95 lbF and ±30.05 lbF.

Example 2 ' Plug & Test® indicators and sensors:

When considering the accuracy, it is crucial to sum the accuracy of both the sensors and the indicators. For instance, Models 7i and 5i indicators boast accuracy values of ±0.1% FS, while the Model 3i's accuracy is ±0.2% FS. Using the Series R50 torque sensor example alongside the Model 3i indicator, the total accuracy would amount to ±0.55%. Specifically, for the Model MR50-12, the accuracy calculates as ±0.55% x 135 Ncm = ±0. Ncm.

Percentage of Reading:

Due to these fixed errors, lower measured values will reflect a greater inaccuracy when viewed as a percentage of the reading.

Continuing with the M5-50 force gauge example, a fixed error of ±0.05 lbF represents a more significant error percentage at a 1.00 lbF load compared to a 30.00 lbF load.

Calculating the error as a percentage of the reading is done by dividing the fixed error by the measured value. For instance, with a 1.00 lbF load, the fixed error translates to ±0.05 ÷ 1.00 lbF = ±5% of the reading. Conversely, for a 30.00 lbF load, it becomes ±0.05 ÷ 30.00 lbF = ±0.17% of the reading.

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Conclusion:

Given the correlation between load and accuracy, it is advisable to choose an instrument capacity that closely aligns with the maximum anticipated load.

Standard Method for Loop Tack Test

The Loop Tack Test serves as a method for assessing the tack strength of adhesive tapes and pressure-sensitive adhesives. ASTM D outlines a testing approach utilizing a specimen strip measuring 7 in. (175 mm) in length. Notably, both the FINAT FTM 9 'Quick Stick' Tack Measurement Test and the TLMI L-IB2 Tensile Tester Loop Tack Test employ a specimen strip of the same length.

Alternatively, a dedicated machine known as the Loop Tack Tester may be utilized, though it is rarely the sole testing equipment for manufacturers.

With a Tensile Testing Machine or universal Testing Machine, a variety of other standard adhesive and material tests can also be performed, including 90-degree peel adhesion tests, 180-degree peel adhesion tests, and standardized tensile strength testing.

Below is a brief video demonstration of the loop tack test for adhesive tapes using the Labthink Tensile Testing Machine.

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