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How to distinguish PVC packaging tape?

by:Kint      2020-01-16
Ordinary sealing PVC packaging tape in daily life '> PVC packaging tape (BOPP two-way stretch polypropylene) It is an indispensable daily necessities for any enterprise, company or individual, but compared with the current domestic situation, although there are many manufacturers, the technology is uneven. Moreover, the technical content of the domestic tape industry is still at a very low stage, and the state has not yet made a clear choice. People often know that the tape is at a very ignorant stage. They think that the price is low and the viscosity is good. In fact, these are all wrong understandings and judgments. So how do you choose the quality of the tape? In fact, there are two standards for the quality of the adhesive tape in use. One is the initial adhesion and the other is the retention force. The two are inversely proportional. Under normal circumstances, the adhesive tape with a adhesive force lower than No. 10 is less glue coating, which is generally only about 20 microns, such as stationery tape and adhesive tape for ordinary promotion binding. The initial adhesion of normal sealing tape is 15- Between the 20th, the thickness of this kind of adhesive tape glue is generally 22-28 microns. It is a standard thickness. However, most of the adhesive tapes on the market are mixed with impurities, so the thickness is increased. In order to cover impurities, the glue is also mixed with toner, so the transparent adhesive tape appears egg yellow and light green, this kind of tape is generally inferior. How to distinguish between good and bad colored tape? For Colored tape, it is usually yellow and khaki. The adhesive is pinched and then quickly pulled apart, and the glue on one side can be pulled away to see the purity and transparency of the original film. You can also look at the thickness of the glue. If there is no glue to be pulled apart or Punctate, there are a lot of impurities in this glue, and the glue has no cohesion. Second, there is too much water and it has volatilized. At this time, the initial adhesion of this kind of adhesive tape has dropped very badly, and the hand feeling can be distinguished. In fact, there are many ways to distinguish between good and bad tapes. As long as you pay more attention in your life, you can distinguish between good and bad tapes.
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