How to distinguish between good and bad colored tape and how to distinguish the quality of tape

How to distinguish the quality of colored tape.

How to distinguish the quality of colored tape? For the colored tape is to facilitate marking and masking, generally beige and earthy yellow are more, and many people think that the colored tape is the color of the film, but in fact, the color is the color of the glue. The adhesive pair is pinched tightly and then quickly pulled apart, and the glue on one side can be pulled apart, and the purity and transparency of the original film can be seen.

The most important thing is to see the thickness of the glue, if there is no glue to be pulled apart or dotted, there are a lot of impurities in this glue, and the glue has no cohesion.

Second, there is too much moisture, which has been volatilized, and the initial adhesion of this tape has decreased very much, and the feel can be distinguished. The yellow tape is applied to the object, and the better the mask, the thicker the glue and the better the quality. In comparison with the appearance of the tape, there is less glue, the color of the whole roll of the doped tape is very dark, and the light transmittance of the tape is high after being opened.

The color of the whole roll of good tape is not much different from the color of the one after it is opened, because the good tape has strong shading, and there is no color superposition. Doped inferior tape to coat impurities on the BOPP film, only the use of relatively backward direct gluing method, so there are often large impurity particles are not completely dissolved and the knife is stuck, so the tape in use often has lines (no glue in the place), good tape using soft transfer glue, no ** situation (printing tape leakage and less printing is related to the printing press).

Another way to distinguish is to look at the surface of the tape, the tape has just been slitted into a finished product, there are bubbles, and the bubbles will basically disperse after a week, and the surface of the tape with pure tincture glue is smooth and clean, without any white spots. Tape mixed with impurities has many irregularly distributed white spots, which cannot be dispersed by hand, which is different from air bubbles.

Another important condition for distinguishing good and bad tape is not to feel the viscosity just by feel, because the initial adhesion of the doped tape is very high when there is no volatilization, so it is necessary to paste the object with the tape and then quickly pull it away to see the holding force. When the doped tape is used for glue formulation, it is generally dissolved with gasoline and acid, so the smell is very large, and the regular large enterprises are dissolved with toluene, which has been volatilized by the fan during the coating process.

Judging the quality of transparent tape mainly depends on the viscosity of the tape. The adhesive tape with high viscosity is good, of course, this cannot be used as the only criterion, because some inferior tapes have a long stickiness after leaving the factory, and they will not stick after a period of time. This is certainly not the case with the tape.

There are mainly the following ways to judge the quality of the tape:

Let's look at the thickness of the tape paper core first, the thickness of the standard paper core is 3mm. Looking at the diameter of the paper core, the standard diameter is.

Smell the tape, if it smells loud or smelly, it is not of good quality.

Check the surface of the tape, including whether the two sides of the tape are sticky and whether there are gaps, the two sides of the tape are not sticky and there are no gaps.

Check whether there are air bubbles on the surface of the tape, the tape is rolled very tightly and there will be no bubbles, of course, if it is a new tape, there may be a little bubbles.

Check the tension of the tape, if the tape is particularly easy to break, it is inferior quality. Good tape is not easy to break when using a good transparent film.

The most important thing is to check the viscosity of the tape. There are also many ways to inspect the box, you can seal the box with tape, and then withdraw it suddenly, the more you can peel off the surface of the box, the better the stickiness. You can also pull a relatively long section of tape, divide it into two, fold it in the middle position and fit it fully, and then pull it up suddenly, if the tape is not pulled up or part of the tape breaks during the tape pulling up, it means that the stickiness is strong.

Distinguish the quality of the tape and make a simple judgment:

Look at the total thickness of the tape.

Look at the pull of the tape.

Look at the gluing of the tape (i.e., the stickiness).

Look at the peeling force of the tape.

Hello, since there are so many types of tapes, I don't know what kind of tape you need to discern *** bad? Take ordinary scotch tape as an example, if the tape is dense as a whole, the edge of the paper tube is neat, and the viscosity is good, it is considered to be of good quality.

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Generally, it is pulled first to see how tough the tape is, and there is also the smell, if the smell is pungent, it proves that the glue used in the tape is particularly poor.

Tape will be due to the environment, temperature and other factors to cause problems such as stickiness, warping, lack of viscosity, this is normal, when the tape has these problems, with the primer can be used, domestic 952 can also be, many materials are universal.

In practical applications, we often encounter problems such as "the tape we just bought, it didn't stick for a long time", "the tape broke during product transportation", how should we judge the quality of the sealing tape? Today, Raxwell will teach you a few tricks!

1. Look at the color.

The color of the sealing tape is mainly determined by the film (usually BOPP film) and glue, the BOPP film itself is transparent, and the glue (usually pressure-sensitive adhesive) is usually orange and beige. Poor quality tapes are cheap films, which are not highly transparent, and the glue is prone to yellowing, which will cause the whole roll to look yellow.

2. Smell the smell.

This is a very straightforward way to tell, and low-quality tape will smell sour, most likely made with low-quality glue.

3. Feel the tensile force and stickiness of the tape.

Tensile force and viscosity are the most important factors in judging the quality of the tape, the general manual test can be, pull the tape with your hands, feel its tensile force; Pull a roll of tape and stick it on the carton and then tear it off, see if the carton paper skin is torn off together, if you tear it off together, it proves that the adhesive strength of the tape can be, be careful not to test the viscosity of the tape with the palm of your hand, be sure to test it on the carton.

Fourth, look at the thickness of the sealing tape.

Generally, the thickness of the tape on the market varies from 40U to 60U (the thickness of BOPP film), and of course, ** is also very different. The 60U tape is very thick, but the length is shorter for the same thickness, and the 40U tape is long, but it is very thin and easy to break. Generally, we recommend choosing 50u.

Fifth, look at the tightness of the winding.

Good sealing tape is tightly wound, high-quality without bubbles, no impurities, and low crevice; Poor quality tapes are the opposite, loosely wound and have many bubbles, such as the comparison between the Raxwell super transparent box tape and the adhesive tape of the competitor below.

In addition to the above identification methods, we should also beware of the problem of insufficient tape size. Due to the false reporting of the length of the tape, the tape with the same thickness will also be used in different lengths due to factors such as the thickness, size, and tightness of the paper tube, so the durability of the tape can only be felt after the actual operation.

1.Whether there are flaws from the outside, whether the tape is rewound or not, whether there is a burr in the slitting, and whether it is smooth 2Look at the tape material "There are many types of electrical industrial tapes, so I will not introduce the quality of the material one by one, and in most cases it depends on the use of 3

Looking at the glue, now most of the glue has evolved to environmental protection, the taste is very important, if it is very pungent, it is a relatively large possibility of defective products "does not refer to all tapes, is there any anti-sticking when the tape is pulled down and used, and there is no residual glue after use, if the residual glue is on the product, this is the fatal point of the defective tape Precautions? PVC material is basically the same, mainly to see the glue, poor quality tape after a period of time, and then unwrap, you can see the separation of glue and PVC material, it looks sticky and very uncomfortable, and the tape will not have this problem.

1.Check the viscosity of the tape. Glue the scotch tape to the cardboard box, and the tape that can peel off a layer of the paper skin when pulling up the scotch tape is a good tape.

2.Check whether there is glue overflow on both sides of the tape, and when it overflows, the adhesive tape sticks to both sides, resulting in various troubles in the use of the tape, and the adhesive tape will also decrease due to the instability of the glue.

3.Whether the smell of the tape is very large, the smell is strong proves that the glue is volatile, and with the gradual volatilization of the glue, the viscosity decreases, and even the tape becomes a film and completely loses its viscosity.

4.Check whether the tape has air bubbles, the new tape will have some air bubbles, and the tape should be tight and free of air bubbles after storage for a period of time.

5.The tensile test of the tape, a good tape will definitely not break easily.

Choose the size you like and need, I don't think it matters if it's bigger or smaller.

The more important thing is the taste, if the taste is pungent or smelly, it means that the glue part is unqualified, and it is best not to buy it, because it is more toxic than the qualified tape.

Smell it and look at it, and then tear it open to judge whether it's good or bad!

First look at it, there are no impurities, and then smell the smell.