During long-term use or storage, the performance of scotch tape will gradually change, which is the aging phenomenon. Understanding the factors that influence its aging performance and conducting accelerated aging testing are critical to assessing tape quality and predicting its service life.
First, lighting is a key factor. Ultraviolet rays have high energy. If scotch tape is exposed to the sun for a long time, its adhesive layer and base material will undergo chemical bond breakage and molecular structure changes due to ultraviolet radiation, causing the tape's viscosity to decrease and the base material to become brittle, thereby accelerating aging. .
Secondly, temperature has a significant impact on the aging of scotch tape. A high-temperature environment will soften the glue of the tape and increase its fluidity, which may lead to glue seepage. It will also accelerate the oxidation reaction of the glue layer; while a low temperature may make the tape hard and brittle, reducing its flexibility and viscosity, and repeatedly High and low temperature cycles will aggravate this aging process.
Humidity cannot be ignored either. In a high-humidity environment, moisture may penetrate into the tape and react with the glue, affecting its viscosity. It may also cause the base material to deform due to moisture, thus affecting the overall performance of the tape.
In addition, oxygen in the air will cause an oxidative reaction with the components in the tape, causing the adhesive layer to gradually lose its stickiness and reducing the adhesive force of the tape to the adherend.
When conducting accelerated aging tests, a special aging test chamber is usually used. The test chamber can accurately control environmental parameters such as light intensity, temperature, humidity, etc., and simulate different aging conditions. For example, high-intensity ultraviolet irradiation, high-temperature and high-humidity or low-temperature and low-humidity circulation environments can be set up to simulate the effect of long-term natural aging in a short period of time.
During the test process, samples need to be taken out regularly for performance testing, such as measuring the adhesiveness, tensile strength, elongation at break and other indicators of the tape, and recording the data. By comparing the test data under different aging times, the performance change curve is drawn to determine the performance attenuation rules of the tape under different aging conditions.
Factors such as light, temperature, humidity and oxygen will all have an important impact on the aging performance of scotch tape, and accelerated aging testing provides an effective means to study these effects, helping companies to better improve their product development and quality control processes. Optimize the formula and production process of scotch tape to improve the durability and reliability of the product.
