The peel test, performed by peel adhesion test equipment, is a typical industry standard process that provides the chance to verify that the tape has been applied appropriately in actual use.
The manufacturer specifies that the adhesion must be cohesive and attach to the substrate and the pipe.
Testing Conditions:
One thing to keep in mind is that results between tapes used in the field and those used in the lab may vary. Technical Data Sheets (TDS) depict tests in a perfect laboratory environment; however, onsite testing results frequently fluctuate and reveal lower peel values depending on the circumstances.
Additional effects:
The "wetting-in period" affects the level of adhesion. Peel tests must be performed in the allotted time frame that the manufacturer has provided.
●The peel adhesion measured will be influenced by the material and substrate temperatures. Temperature conditions should be recorded to enable a meaningful comparison of test findings.
● Adhesion measurements in the field frequently differ from those made under carefully monitored laboratory circumstances, so they should only be used to give an overall picture of a product's performance.
What do you need to complete the peel test?
Materials
● test-able tape
● primer, if necessary
Equipment
● Cutting template [steel strip or masking tape] 25 mm wide
● Cut-resistant glove marker pen with an asymmetrical roller grip (available in black or white depending on substrate colour)
● Sharp knives, spatulas, and a capacity-appropriate spring
● instruments for measuring temperature made of steel
What steps should you take to finish the test?
Step 1-Sample Preparation
● Apply the sample as specified by the client, noting any deviations from the advised course of action.
● Allow to wet-in within terms decided upon with the client, noting any deviations from the advised course of action. Since this is the same amount of time utilized in laboratory testing, we advise a minimum of 24 hours.
● Cut a test strip from the substance applied to the substrate that is about 250 mm (10") long and 25 mm (1") broad [or another width as required].
● Cut down both sides of the sample with a sharp knife while positioning the cutting template on it.
● A strip about 50 mm (2 inches) long should be eased from the substrate and bent back while wearing a cut-resistant glove and a spatula. This will provide the roller grip something to hold onto, or a "tail."
● On or near the cut strip, mark indicator lines in the appropriate colour every 25 mm (1 inch).
Step 2- Determination of Adhesion
● The sample's tail should be inserted into the roller jaw and gently pulled to lock. To prevent the grip's gross contamination by the glue, wrap a piece of paper around the tail.
● The markers should be used as a guide to peel speed when you pull the sample back on itself [180°] while striving to keep a pace fast enough to move the adhesion test front 25 mm (1") in 10 seconds. This will result in a 300 mm/min (12"/min) movement of the roller grip or more if the carrier film extends. Strictly regulating the test speed might be impossible given the constantly shifting environmental factors.
● Note the average and maximum kilos load displayed on the spring balance.
● Calculate the peel strength by converting the average load to Newtons by multiplying it by 9.81, then dividing the result by 25mm/1" [or, if suitable, the peel strip width in mm] to get the peel strength in Newton per millimeter width [N/mm].
Step 3- Reporting and Recording of Results
● Record the average and peak values of the peel adhesion results appropriately, such as in a lab notebook.
● Take note of the substrate's characteristics and Preparation.
● Record the test's environmental details, such as the substrate, the wetting-in period, the temperature, and subsequent actions.
● Report the test conditions and outcomes as specified in the client agreement.
Conclusion
To successfully apply the material, it is essential to test the adhesive strength, which should be performed with good lab testing equipment.
