Self-adhesive is a special self-adhesive paper material, which can be directly pasted without glue. Self-adhesive materials are usually composed of three parts: surface material, adhesive and backing paper. The surface material is usually paper, plastic film or metal foil, etc. The adhesive is a chemical substance with strong viscosity, and the backing paper is usually a smooth, easy-to-tear paper or plastic film.
The performance testing of self-adhesive usually includes the following aspects:
Adhesion: Refers to the adhesion produced when it is attached to different surfaces, which can be measured with an adhesion Tester.
Peeling force: refers to the strength of peeling the self-adhesive from the adhesive surface under certain conditions, which can be measured with a peeling force Tester.
Adhesive performance: refers to the ability of self-adhesive to remain on different surfaces under certain conditions, which can be measured using an adhesive Tester.
Adhesive performance: refers to the appearance and texture it presents after laminating on different surfaces, which can be evaluated by visual inspection and hand feeling inspection.
Temperature resistance: The stability of the self-adhesive at different temperatures can be measured with a thermal stability Tester.
Water resistance: The stability of the self-adhesive under different humidity conditions can be measured with a water stability Tester.
Oil resistance: The stability of the self-adhesive under different oily conditions can be measured with an oil stability Tester.
Environmental protection: Whether the self-adhesive has an impact on the environment during production and use, environmental testing instruments can be used to measure the content of volatile organic compounds, heavy metals, chloride ions and other harmful substances.
Specifically, different self-adhesive materials may require different detection methods and instruments to ensure the accuracy and reliability of the test results. For example, for stickers on plastic film surfaces, pressure-sensitive adhesive adhesion performance Testers, heat resistance Testers, oil resistance Testers, environmental testing instruments, etc. can be used to test their performance; for stickers on paper surface materials, adhesion Testers, peel force Testers, and bonding performance Testers can be used to test their performance.
In the specific testing process, it is necessary to select appropriate testing instruments and methods according to different testing items, and at the same time, it is also necessary to carry out corresponding testing according to different application fields and requirements. For example, if the self-adhesive material is used for food packaging, it needs to be tested for its food contact safety, including the content of volatile organic compounds, heavy metals, and harmful substances. At the same time, the service life and environmental protection performance of self-adhesive materials also need to be tested.
The performance testing of self-adhesive requires the use of different testing instruments and methods to detect different performance indicators. Here are some common detection methods:
Adhesion test: Use an adhesion Tester to stick the self-adhesive on the surface of the sample to measure its adhesion under specific conditions. This test method is generally suitable for measuring the adhesion of self-adhesive to paper, plastic, metal and other surfaces.
Peel force test: Use a peel force Tester to peel the self-adhesive from the surface under specific conditions to measure the force required for peeling. This test method is generally suitable for measuring the strength and tensile properties of self-adhesive during peeling.
Adhesion test: Use an adhesion Tester to measure the adhesion performance of the self-adhesive to the surface of the sample under specific conditions. Usually, the method of cyclic peeling and re-adhesion is used to detect the long-term adhesion performance of the self-adhesive.
Thermal stability test: Use a thermal stability Tester to test the stability of the self-adhesive at high temperature to detect its high temperature resistance.
Humidity stability test: Use a humidity stability Tester to test the stability of the self-adhesive in a high-humidity environment to detect its moisture resistance.
Packaging performance test: Use a packaging performance Tester to test the packaging performance of self-adhesive materials, including damage, compression resistance, tensile performance, tearing performance and other indicators.
Environmental performance test: Use environmental performance testing equipment to test the content of volatile organic compounds, heavy metals, chloride ions and other harmful substances in self-adhesive materials to detect their environmental performance.
The above methods are not all self-adhesive performance test methods, and different types of self-adhesives need to choose different test methods. In addition, it should be noted that appropriate detection conditions should be selected during detection to ensure the accuracy and reliability of the detection results.
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