Tape is also the most commonly used item in life, mainly because it is convenient for us to use it in daily paste, so today Xiaobian will come with you to the science of tape. Xiaobian introduces the tape to the common knowledge of the special tape before you. Special tapes are different from the usual tapes we usually use. They generally have special applications and only use tape in one aspect. So what are the classifications of tapes that are now entering our topic? 1: According to chemical composition, it is divided into organic adhesive tape and inorganic adhesive tape. 2. Classified by shape: can be divided into liquid adhesive tape and solid adhesive tape. 3. Classification by purpose: This can be divided into structural adhesive tapes, non-structural adhesive tapes and special adhesive tapes (such as high temperature resistance, ultra-low temperature, electrical conductivity, thermal conductivity, magnetic permeability, sealing, water bonding, etc.). 4. According to the application method: there are room temperature curing type, thermosetting type, hot melt type, pressure sensitive type, rewet type and other bonding agents. In order to meet the needs of cementing technology in industrial and agricultural production and social life, countries have made great efforts in the development of adhesive tape varieties, and they have developed rapidly, and there have been various adhesive tapes with various functions. How can I buy special tapes with confidence? It should be the question that everyone wants to ask most, and it is also a problem we often encounter in life. 1. When you purchase, pay attention to the smell and find that the taste is very strong. There is a smell of sour smell. The adhesive tape has very poor retention. Especially in low temperature environment, it will crack when it is basically stuck on the carton. The stronger the taste. At the time of the hand, the initial adhesion is still very sticky, but the glue surface will soon dry up and lose the gelatinity. At that time, there will be cracks on the surface of the adhesive tape. Because of the uneven relationship between the glue. 2, look at the brightness of the tape film, the general inferior adhesive tape is dark, the probability of this adhesive tape breaking is very high, the strength is poor. 3, the thickness of the feel of the film, the adhesive tape of the film is generally relatively small, and due to the film thickness, the actual number of meters will be reduced. The film selected for a good adhesive tape is relatively soft and has good elongation by hand. 4, look at the color, the general transparent adhesive tape appearance of the whiter color, the less adhesive tape with less impurities, in order to ensure the normal adhesive, 100 meters below the adhesive tape has a certain transparency can see the paper tube. The yellow adhesive tape looks at the irregular white spots on the surface of the adhesive tape, and the imprinted with impurities or glued blots by hand, the product generally has an odor. 5, look at the paper tube: the inner diameter of the paper tube of the adhesive tape is a uniform 7.6 cm, but the inferior adhesive tape in the paper tube in order to mislead the consumer in the thickness of the work is done, so that many people generally believe that the thicker the paper tube The bigger the outer ring, the better the adhesive tape. This is a misunderstanding. 6, look at the tightness, the process of the adhesive tape from the semi-finished product to the finished product is machined for stripping, there is a certain tension, the tension is large, the adhesive tape will be wound tightly, the adhesive tape is conventional. It should be neatly rolled. There is no gap in the adhesive tape. The glue and air are combined to a small extent, which can extend the shelf life of the adhesive tape and maximize the adhesion of the adhesive tape. Did you understand the common sense of tape through the introduction of Xiaobian? When buying tape, be sure to remember the six points that Xiaobian teaches you.
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