The viscosity of box sealing tape mainly consists of three objectives: initial viscosity, holding viscosity, and peel strength. These are also the fundamental three rules of the national standard for testing the adhesion of sealing tape or adhesive products. The corresponding instruments are called initial viscosity tester, holding viscosity tester, and electronic peel testing machine. You can also choose the corresponding sealing tape inspection instrument according to your own needs.
Measuring the thickness of adhesive tape film is one of the fundamental inspection items in the film manufacturing industry. Some other performance goals of thin films are related to thickness. It is obvious that if the thickness of a batch of single-layer films is uneven, it will not only affect the tensile strength and barrier properties of the films in various parts, but also affect the subsequent processing of the films. Regarding composite films, the uniformity of thickness becomes increasingly important. Only when the overall thickness is uniform, can the thickness of each layer of resin be even. Therefore, whether the thickness of the film is uniform, whether it is consistent with the preset value, and whether the thickness deviation is within the specified range are all conditions for whether the film can have certain characteristic goals.
Thin film thickness measurement can be divided into two types: online testing and non online testing. The earliest technology used for thin film thickness measurement was non online thickness measurement skills. In the future, with the continuous development of radiation skills, online thickness measurement equipment will be gradually developed and installed together with thin film production lines. Online thickness measurement skills have been widely used since the 1960s, and now they can even check the thickness of a certain coating on thin films. Online thickness measurement skills and non online thickness measurement skills are completely different in testing principles. Online thickness measurement skills usually use non-contact measurement methods such as X-ray skills, while non online thickness measurement skills usually use mechanical measurement methods. Perhaps based on eddy current skills or electromagnetic induction principles, optical thickness measurement skills or ultrasonic thickness measurement skills are also used.

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