The common sealing packaging tape (BOPP biaxially oriented polypropylene) is an indispensable everyday item in the life of any company or individual, but related to the current situation in the country, although there are many manufacturers, but the skills are mixed.
People’s daily understanding of the tape is in a very ignorant stage, there is no in-depth understanding, thought the price is low, feel high viscosity is good tape, in fact, these discriminations are too simple.
So how to choose the tape is good or bad? In fact, the glue of the tape is good or bad in the use of two standards, one is the initial adhesive force, a persistent force, the two are inversely proportional. The general condition of the adhesive force is less than 10 tape is the glue overcoat teaching less, the general only about 20 microns, such as stationery tape.
The tape used for general promotion bundling. The normal sealing tape initial adhesive force between 15-20, the thickness of this tape glue is generally 22-28 microns. Is in line with the standard thickness. But most of the tape on the market are adulterated with impurities, so the thickness increases, in order to cover the impurities, the glue is also mixed with color powder, so the transparent tape shows the egg-yellow, light green, this tape is generally poor quality.
How to distinguish good from bad on colored tape? About the colored tape, the general is more yellow and earthy yellow. The sticky pinch and then quickly open, can be pulled off one side of the glue, you can see the purity and transparency of the original film. You can also look at the thickness of the glue, assuming that no glue is set apart or dotted open, this glue is a lot of impurities, the glue is not cohesive. The second is too much water, once evaporated, at this time this tape initial adhesive force has landed very fierce. The feel of the hand can be distinguished. In fact, there are many ways to identify the good and bad of the tape, just pay more attention in the day, you can tell the good and bad of the tape.