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How to identify the quality of sealing tape?

Publish Time: 2020-04-21   Views:
Ordinary sealing tape is an indispensable product in any company and personal life. Due to its low technical content and numerous domestic manufacturers, the quality of products on the market is uneven. And our domestic tape industry is still in the stage of very low technical content, the country has not a perfect standard for the tape. Many consumers of the understanding of the tape is low price, feel viscosity is better, in fact, this is wrong. Buy tape must not cheap, one price one goods, cheap tape must be from the raw material.
1. Composition of tape:
Packing tape is on the basis of the original film BOPP two-way stretch polypropylene makes a rough surface after a high voltage corona coating glue, after again after slitting machine is divided into small volume is our daily use of tape, so first of all, the strength of the tape depends on the stand or fall of BOPP film and the thickness, average film thickness between 28 micron - 30 microns, but due to some doping the reworked material of BOPP film strength is not enough, so only with thick membrane thickness of this tape feels feel is very thick, but the strength is poor, short shelf life will appear obvious aging condition. The colored tape is for marking and masking purposes, not the color of the film, but the color of the glue.
Common sealing adhesive tape is acrylic tincture glue, also known as pressure sensitive adhesive. Tincture is a kind of polymer activity, temperature has a certain effect on the molecular activity. The tincture of glue fat content directly affects the use of the tape, many individuals think that hand sticky tape is good for glue, actually this is wrong. There are two standards for the quality of adhesive tape in use, one is the initial adhesive force, one is the retention force, the two are inversely proportional. The thickness of the normal sealing tape glue is generally 22-28 microns, which is the standard thickness.
2. Identification of tape:
In fact, the purpose of using adhesive tape is not to stick the problem, but to stick firmly will not be separated. Now most of the poor quality tape in the use process, after a period of time (20 minutes to an hour) will appear the collapse of the situation, and can not be pasted again; Next inferior tape is easy to break, the strength is very low, mainly with the quality of the film, but also to avoid sharp objects scratch the section of the tape, otherwise the tape film will be broken. Some people think that the tape surface contains more bubbles of the tape must not be a good tape, in fact, the tape just after the end of the finished products are divided into bubbles, placed for a period of time after the bubble will basically dispersed.
In addition, the normal enterprise production tape paper tube thickness of 100 meters below the tape is 3 mm, 100 meters above is 4 -- 5 mm, and small businesses to deceive consumers using thick paper tube, is usually thickness of 5 -- 7 mm thickness, thus in the appearance of the larger, but the tape meat thickness is clearly compared. So when choosing the tape must see clearly the width of the tape and the thickness of the tape.
To sum up, from appearance to tape has been basically can judge of the tape, then the most important condition for a bad tape just don't feel alone feeling viscosity, because at the beginning of doping tape in the absence of volatile viscous force is very high, so use tape paste objects, then quickly pull the retention paste repeatedly several times again with the hand to touch, feel sticky decline significantly. Doped tape for the glue formula is usually dissolved with gasoline and acid, so the smell is very large.
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