How to check whether the stickiness of BOPP synthetic label paper meets the standard?

A variety of methods can be used to test whether the viscosity of BOPP synthetic label paper is up to standard, including qualitative and quantitative tests. Here are some common detection methods:

First, qualitative test method

1. Method of observation:

Paste the BOPP synthetic label paper on a smooth surface and see if it adheres firmly and holds for a period of time.

If the label paper can adhere firmly and is not easy to fall off, it indicates that it has a high viscosity.

2. Feel:

Touch the surface of the BOPP synthetic label paper with your fingers to feel its stickiness.

If the surface of the label paper has a certain viscosity and the finger can feel a certain resistance, it indicates that it has a certain viscosity.

3. Stripping force test:

Attach a small piece of BOPP synthetic label paper to a smooth surface, then use force to quickly peel off the label paper.

The stickiness of the label paper is judged according to the resistance during stripping. If the peel requires a certain force, and the label paper is not easy to peel, it indicates that its viscosity is high.

Second, quantitative test methods

In addition to qualitative testing, quantitative testing methods can be used to more accurately assess the stickiness of BOPP synthetic labels.

1. Tensile test:

The tensile test of BOPP synthetic label paper was carried out using the tensile testing machine.

Its viscosity was evaluated by measuring parameters such as its maximum tensile strength and elongation at break. In general, BOPP synthetic labels with higher viscosity will exhibit higher tensile strength and lower elongation at break when stretched.

2. Adhesion test:

Use a viscometer or similar test device to measure the adhesion of BOPP synthetic label paper.

This test method evaluates the stickiness of the label paper by measuring the amount of resistance during shearing. Commonly used viscometers include rotary viscometers and rolling ball viscometers.

Third, specific test steps (taking adhesion test as an example)

1. Prepare sample:

Cut the BOPP synthetic label paper into samples according to the required size.

2. Prepare the adhesive:

Select a suitable adhesive, such as a specific glue or tape, to ensure its compatibility with BOPP synthetic label paper.

3. Paste sample:

The sample is fixed on a flat surface and coated with a layer of adhesive. Ensure that the adhesive is evenly applied without bubbles and impurities.

4. To test:

Place the measuring head of the viscometer over the specimen and bring it into contact with the surface of the specimen.

Start the viscometer and pull the measuring head at the set speed until the adhesive separates from the specimen surface.

5. Record the result:

Record the adhesion value shown by the viscometer and the relevant parameters during the test.

6. Repeat testing:

As needed, multiple tests can be performed to obtain more accurate average results.

Fourth, precautions

Before conducting the test, ensure that the test equipment and environment meet the relevant standards and requirements.

The test should be carried out in strict accordance with the operating procedures to avoid the influence of human factors on the test results.

For different BOPP synthetic labels and application scenarios, different test methods and standards may be required to assess whether their stickiness is up to standard. Therefore, when choosing the test method, it should be considered and selected according to the specific situation.

Through the above method, it can effectively detect whether the viscosity of BOPP synthetic label paper meets the standard, and provide guarantee for the quality control and application performance of the product.