How to determine the initial viscosity of Encasement Adhesive Tape?

Measurement methods

The initial tack of packaging adhesive tapes can be determined using the following methods:

1. Hand feeling method: Touch the stickiness of the adhesive tape with your fingers. The better the initial tack, the easier it is for your fingers to stick to the adhesive tape. However, the result of this method is easily affected by people's subjective feelings and is not accurate enough.

2. Tensile force method: Stick the adhesive tape on a flat surface, then quickly pull the adhesive tape with a certain force, and measure the stretching force. The better the initial tack, the greater the force required to stretch. This method requires the use of specific equipment for measurement, but the results are relatively accurate.

3. Adhesive-peeling force test method: stick the adhesive tape on a flat surface, and then use specific equipment to separate it from another surface to measure the adhesive-peeling force. The better the initial tack, the more force the tape will require to separate. This method requires the use of professional equipment for measurement, and the results are relatively accurate.

Steps

Different assay methods require the use of different equipment and procedures. Here are the specific steps for each method:

1. Feel method:

Stick the adhesive tape on your finger, press it lightly with your finger, and observe whether the adhesive tape can stick to your finger firmly and not fall off as much as possible.

2. Rally method:

Adhesive tape is attached to a flat surface and then pulled apart quickly using a special device to measure the force of the stretch. When stretching, you need to pay attention to the following points:

• Make sure the stretching speed and angle are the same to ensure repeatability of test results.

• Adhesive tape should be attached to the surface as much as possible to ensure the accuracy of test results.

• The force required to stretch should be recorded during the test, and the test should be repeated several times to obtain an average value.

3. Adhesion and peel force test method:

Adhesive tape is attached to a flat surface and then separated from another surface using specific equipment to measure the adhesion and peel force. When testing, you need to pay attention to the following points:

• Test equipment should comply with relevant international standards to ensure the accuracy and repeatability of test results.

• Adhesive tape should be attached to the surface as much as possible to ensure the accuracy of test results.

• The adhesion and peel force should be recorded during the test, and the test should be repeated several times to obtain the average value.

In conclusion, different test methods can be used for different types of adhesive tapes, but an appropriate method needs to be selected to ensure the accuracy and repeatability of the test results. No matter which method is used for testing, it needs to be tested under correct operation to ensure the accuracy and repeatability of test results.