Test the initial adhesion of pressure-sensitive adhesive

The methods to test the initial adhesion of pressure-sensitive adhesives include the initial adhesion test, the stick holding test, the temperature resistance test, the thermal indentation test, the anti-stripping property test, etc. The initial viscosity test can be tested using the “zhi” word method, the specific steps are as follows:

1. Cut a small slit in a clean conical bottle.
2. Secure one end of the pressure-sensitive rubber strip to the small mouth of the conical bottle, and touch the other end to the blackboard or glass plate.
3. Press down hard on the adhesive surface to make the pressure-sensitive adhesive adhere tightly to the blackboard or glass plate.
4. Read the initial adhesion value of the pressure-sensitive adhesive on the blackboard or glass plate, ing.

The stickiness test can be tested using a standard method, the constant speed tensile test method. The specific steps are as follows:

1. Fix the pressure-sensitive adhesive strip on the fixture of the constant speed tensile testing machine.
2. Fix the fixture and the test piece at a 90-degree Angle, and connect the tension transducer.
3. 3. Adjust the tensile testing machine, so that if the test piece is out of the fixture moment, there is an appropriate tension.
4. Read the holding force value of the tensile test machine, in Newton.

The temperature resistance performance test can be tested by the high-temperature aging test method, that is, the pressure-sensitive rubber strip is placed in the high-temperature test box to simulate the high-temperature environment for the aging of the pressure-sensitive rubber strip. The processing time can be as long as needed, usually 24 hours. The properties of the pressure-sensitive adhesive strip can be tested after treatment, including initial adhesion, stickiness, and temperature resistance.

Thermal indentation test can be used to test the heat resistance of pressure-sensitive adhesive strips. The specific steps are as follows:

1. Place a piece of non-adhesive paper or cloth on the plate, tear off the aluminum sheet or copper sheet (0.14mm thick) with a hole punch or hand, and place a thin layer of pressure-sensitive adhesive on it.
2. Tear the aluminum or copper sheet into 14mm x 14mm pieces using a tool or hand.
3. Put the aluminum sheet or copper sheet on the plate, press the aluminum sheet or copper sheet closely with the pressure-sensitive adhesive strip, and then press it until dry.
4. Check whether there are thermal indentation and bubbles after 24 hours at 38 ° C. If not, leave it at 100 ° C for 30 minutes.

The stripping resistance test can be carried out by the non-woven fabric method, and the specific steps are as follows:

1. Put a piece of non-woven cloth (such as a wiping cloth) on a clean plate and tear it into small pieces with a hole punch or hand.
2. Apply a thin layer of glue on the non-woven fabric.
3. Stick the non-woven fabric on a clean plate, and stick to the non-woven fabric with tape or pressure sensitive adhesive strip.
4. After waiting for some time, tear off the tape or pressure-sensitive adhesive strip from the non-woven fabric and observe whether there is a residual adhesive layer on the non-woven fabric.

If you are interested in our products, please feel free to contact us!