Texture Analysis in Action: the Tape Unwinding Rig

The TAPE UNWINDING RIG (A/TUR) allows the measurement of unwind adhesion – the force required to unwind the tape from the roll. 

This attachment consists of a spool, with heavy duty ball bearing, the mount for which screws to the test platform. A standard tensile grip secures the loose end of the tape reel and the adhesive strength may be measured as the grip tries to peel the tape from the reel.

The rig allows the measurement of unwind adhesion – the force required the tape from the roll.

Unwind Adhesion Test Procedure:
The roll of tape is mounted on a mandrel so that it can turn without appreciable friction. The mandrel is fixed in the driven clamp of the tensile testing machine, the free end of the tape is fixed in the other clamp and the unrolling force is measured.

Standard Method according to:
• AFERA 4013: Unwind adhesion of adhesive tape at low speed (1944) (as issued by AFERA in September 1979 and later revised in September 1989)
• PSTC 8: Unwind Force of Pressure Sensitive tape (as issued by PSTC in September 1955 and most recently revised in June 2000)

Method applies to:
Pressure Sensitive Adhesive Tapes

Use:
The test method is designed to measure the force required to unwind a roll of adhesive tape at low speed under standard test conditions. Unwind adhesion is a quantitative measure of the degree of ease or difficulty in unwinding a roll of tape.

Analysis:
• AFERA 4013: After 25mm peeling, the minimum, maximum and arithmetic mean (i.e. average) of 5 readings of unwinding speed in Newtons per centimetre of width rounded to the nearest Newton are recorded.
• PSTC 8: The maximum unwind adhesion value in pounds per inch width to the nearest 0.1lb, or other suitable unit, is recorded. If other than 1" widths are tested, 1" values are found as the result of dividing the observed value by the specimen width.

 

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We can design and manufacture probes or fixtures for the TA.XTplus texture analyser that are bespoke to your sample and its specific measurement.

Once your measurement is performed, our expertise in its graphical interpretation is unparalleled. Not only can we develop the most suitable and accurate method for the testing of your sample, but we can also prepare analysis procedures that obtain the desired parameters from your curve and drop them into a spreadsheet or report designed around your requirements.

For more information on how to measure texture, please visit the Texture Analysis Properties section on our website.

The TA.XTplus texture analyser is part of a family of texture analysis instruments and equipment from Stable Micro Systems. An extensive portfolio of specialist attachments is available to measure and analyse the textural properties of a huge range of food products. Our technical experts can also custom design instrument fixtures according to individual specifications.

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