Octagonal tablets are aluminum hot products that can be plated in a variety of colors. It is also widely used because it contains no heavy metal lead.
However, some of the domestic manufacturers of cheap quality and octagonal tablets do not dare to flatter, only ten yuan twenty yuan to win the price, the quality has become a fatal killer can not make it!
Octagonal film general requirements:
One, color octagonal tablets can not have friction or water elution color problem;
Second, it must be able to be firmly affixed to clothing, can withstand hand rubbing, washing test, and can not be easily squat.
Third, under the appropriate parameters, all can be hot and not spilled plastic.
High quality octagonal requirements:
First, the color must be very good, can give a good gloss, the color does not sink. In different light can show different luster. To do this requires an excellent plating process. The color of the octagonal sheet is actually electroplated, so the electroplating technique is very critical to the technique of color grading. The poor quality of the octagonal sheet is very poor in terms of technical control, and the degree of color is heavy and the color is single. And the electroplating effect is very poor, easy to appear in the simple rubbing, rubbing, washing the phenomenon of bleaching, and even lead to serious problems of contaminated clothing.
The punching surface of the second and octagonal sheets requires fine and smooth. Whether it is possible to stamp fine angled octagonal sheets not only involves the production of molds, but also relates to the key issue of whether the octagonal sheet itself is excellent. Domestically produced inferior octagonal films, irregularities are fatal problems, such as biased in one direction, high and bottomed. Because of the poor quality of the aluminum material used, several problems occur after being stamped by the machine: 1. At the junction of the top and the periphery, a fault or even a rupture occurs; 2. After the stamping, the top and the periphery are combined to form a small circle; 3. Eight edges and corners can all be seen clearly and prominently, giving a very obvious feeling - rough!
Third, the requirements of uniform glue, not too much or too little. Inferior octagonal pieces, some manufacturers in order to solve the problem of hot can not go up, coated in the inside of the octagonal film a lot of plastic, the bottom of the octagonal film filled with full. A lot of glue has already been higher than the octagonal bowl trough level before it has been hot. From the working principle of hot glue, we know that the hot melt glue is melted and swelled after being exposed to high temperature, and penetrates into the clothing fabric to achieve the purpose of stickiness. Therefore, there are several reasons for the overflow of glue: 1. The glue itself has quality problems; 2. There is too much glue in the bowl, and the hot melt expands after thermal expansion. After infiltrating the clothes, there is still a lot of glue that has nowhere to penetrate and can only overflow to other areas. Part; 3. The permeability of the clothing itself is poor; 4. Octagonal film is irregular, the glue overflows from the irregular side when heated. 5. The temperature is too high and the time is too short. Hot press octagonal and hot presses are different. The octagonal sheet is made of aluminum and has a fast heat transfer rate. If the temperature is too high, the glue is rapidly inflated, causing bubbles in the middle, and the glue will have to burst out of the gap between the octagonal sheet and the clothing.
Fourth, there must be no stamping deformation, high-quality octagonal sheet, even in the whole package is difficult to pick the bad stamping deformation of the material, the overall very uniform.
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