Sealing adhesive is a type of tape commonly used, which is based on the original BOPP film and undergoes high-voltage corona discharge to roughen one surface. After being coated with adhesive, it is then passed through a small red roll of a fire strip. Therefore, the preferred strength of the adhesive tape depends on the quality and thickness of the BOPP film. The BOPP film made from raw material particles has good brightness and strong flexibility.

Packing Tape
The thickness of the general film is between 28 microns and 30 microns. The strength of BOPP film mixed with recycled materials will decrease, so the manufacturer will increase the thickness of the film. This type of tape feels thick to the touch, but has poor strength and a short shelf life. After being left for about half a year, there will be obvious aging, and the surface will be brittle, making it easy to break during use.

The general sealing tape adhesive is acrylic pressure-sensitive adhesive. Many people believe that the adhesive tape that feels sticky is good, but this is incorrect. There are two standards for the quality of the adhesive used in the sealing tape, one is the initial adhesion, and the other is the holding adhesion. Generally speaking, tapes with low initial adhesion have less adhesive applied.

The initial adhesion of normal sealing tape requires a thickness of 22 to 28 microns of adhesive. The adhesive tape mixed with impurities has a very high initial adhesion when there is no transpiration, so it is necessary to stick the object with tape and quickly swing it open to check the adhesion force. Repeat the adhesion several times and touch it with your hand, and you will feel a significant decrease in adhesion.

When using adhesive tape mixed with impurities for glue formulation, it usually needs to be dissolved in gasoline and acid, so the odor is very strong. Good companies use methylbenzene to dissolve it, and it has already passed through the fan during the coating process.

The purpose of using sealing tape for the original document is not to solve the problem of adhesion, but to stick it firmly and not separate. Nowadays, most tapes doped with impurities will experience cracking after packaging operations for a period of time and cannot be pasted again, especially in low temperature environments and dry conditions with wind.

Once again, low-quality tape is prone to breakage and has low strength, mainly related to the quality of the film. Therefore, when choosing tape, it is important to understand the width and thickness of the tape.

Article from: Heshan Sealing Glue www.hshangli.com