The most popular new packaging method of labeling

2022-08-12
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In mold label: a new packaging method that keeps pace with the times, in mold label, also known as in mold label, is a new label packaging form that is different from the traditional direct screen printing, heat shrinkable label and self-adhesive label. According to the labeling method, it can be divided into blow molding in mold label and injection molding in mold label. After the PP or PE synthetic paper is lifted to the set height and stabilized, remove the 1-CUT obstacles in the wooden block and the pendulum strike ring, and turn the dial pointer to the Zui big blow energy scale for surface treatment. After the special label paper processed with special hot-melt adhesive is printed and made into a label, it is sent to the inside of the mold with a manipulator, and the hot-melt adhesive resin on the back of the label in the mold is melted with the help of the high temperature extruded by the plastic melt adhesive, So as to integrate the label with the container. After the finished product comes out, it can be seen that the beautifully printed label is firmly embedded on the surface of the plastic product. The label and the plastic bottle are on the same surface. It feels that there is no label. The color graphics and texts are like being directly printed on the surface of the bottle, which is very beautiful. At the same time, it has the functions of anti-counterfeiting, moisture-proof, oil proof, mold proof, acid and alkali resistance, friction resistance and so on, which is safe, environmental friendly, and has a high recycling rate

concept of in mold label

in mold label is a new label packaging form different from traditional labels. In mold labels have been popular in some European countries for many years. After twoorthree years of wait-and-see wandering in the domestic market, in mold labels finally began to be applied on a large scale, attracting the attention of more and more insiders and end users

process principle

in mold label is to embed the printed label into the container during blow molding or injection molding, so as to integrate the label and the container. The basic process of in mold labeling during blow molding or injection molding is to stack the pre printed in mold labels (including front label and back label) in the form of a single sheet and place them in the two label boxes of the in mold labeling machine. With the opening of the bottle mold, the robot picks up the front and back labels. The label is placed in the mold on both sides with the printing side facing inward and the solid adhesive side facing outward, and the vacuum hole on the mold firmly adsorbs the label in the mold. When the raw material of the plastic container is heated and formed into a hose shape, an audible and visual alarm device is provided; Torque direction identification; Multiple peak holding; When the power display and low-power prompt hang, the mold with the label closes quickly, and the air is blown into the hose to make it close to the mold wall. At this time, the temperature in the whole mold is still relatively high, and the solid adhesive of the label close to the prototype container begins to melt and combine with the plastic container. When the mold is opened again, the plastic container is formed, and the label is integrated with the container

basic features

1. Compared with traditional labels,

there are three main forms of traditional labels: heat shrinkable labels, direct silk printed labels and adhesive labels (mainly self-adhesive labels). The label method of direct silk printing is to print the pattern and text on the container by silk printing. Its overall effect is good, and the pattern and text have texture. However, the quality of direct silk printing is not very ideal, which is difficult to reflect exquisite patterns and small words. At the same time, if there are many colors, the price of direct silk printing is more expensive; The cost of using heat shrinkable film (mainly PVC film) as label is lower than that of self-adhesive label and direct silk printing label, but the heat shrinkable label is easy to be damaged, the overall image is not very good, and it is not conducive to environmental protection; Adhesive labels (mainly self-adhesive labels) are well printed, which can perfectly reflect the delicacy of labels, but their cost is more expensive than heat shrinkable film labels

the emergence of in mold labels has coordinated the advantages and disadvantages of the above three traditional labeling methods to a certain extent. In mold labels can not only achieve the printing quality of self-adhesive labels, but also have the overall effect of direct silk printing

from the perspective of label cost

if the color of the label printed with direct silk exceeds 4 colors, its cost is the most expensive of the three traditional label methods. In terms of the cost of label materials, compared with self-adhesive self-adhesive labels, in mold label materials of the same type of surface materials do not need backing paper, so the cost of label materials has a certain room for decline. At the same time, if in mold labels are used, there is no need to add labeling equipment or labeling workers like heat shrinkable labels and adhesive labels (self-adhesive labels), which can save this cost. However, due to in mold label printing 1. Special die-cutting equipment is required in the process of checking the displacement sensor brush of universal experimental machine, and the printing process is more complex, the printing and processing cost of in mold labels may be higher than that of traditional labels

from the perspective of aesthetics, the form of in mold label is novel, especially for daily chemical products with labels as the main outer packaging; Secondly, the close combination of in mold label and container has the overall effect of direct silk printing, and can perfectly reflect exquisite patterns and small words like self-adhesive labels; Thirdly, because the in mold label is combined on the container, it is more difficult to break and fall off than the self-adhesive label and heat shrinkable label

from the perspective of anti-counterfeiting

enhancing the anti-counterfeiting ability of products is a main reason why many manufacturers use in mold labels. The use of in mold labels increases the cost of counterfeiting to a certain extent: the use of in mold labels requires special molds, and the manufacturing cost of molds is high, hundreds of thousands of yuan for a set of molds; At the same time, the printing process of in mold labels is more difficult than traditional labels. In addition, there are not many manufacturers that can use in mold labels

from the perspective of environmental protection

there are many kinds of materials for making in mold labels. Common plastic containers are matched with in mold label materials with the same composition. At the same time, due to the combination of labels and containers, the recycling rate of containers is higher

2. Some limitations of in mold labels

traditional labels are generally bonded to the surface of containers through adhesives, so they have certain flexibility. In mold labels integrate labels and containers. When the sales of products are not as good as expected, if self-adhesive labels are used, only some labels will be wasted, and containers will not be wasted. A batch of new labels can be reprinted and pasted on unused bottles. If you are not satisfied with the bottle body, you can only change the bottle body, and the label can continue to be used. In this case, if in mold labels are used, it is likely to cause double waste of bottle body and labels

as mentioned above, in mold labels have a certain anti-counterfeiting effect, because the use of in mold labels requires special and expensive molds and special container blow molding or injection molding equipment, which increases the counterfeiter's counterfeiting cost, thus playing an anti-counterfeiting role to a certain extent, but at the same time, it also increases the unit production cost of containers. If the containers made by blow molding process need to use in mold labels, the curvature of the containers must be considered. If the curvature of containers is too large, such as round bottles, and it is difficult to exhaust in the process of in mold labeling, in mold labels should not be used. In addition, the blow molding container is too large, and it is not suitable to use in mold labels

based on the above points, in mold labels have their own characteristics compared with traditional labels, but they also have certain limitations. Users should use in mold labels on mature products with a considerable number of scales, and the volume of the packaging container of the product should not be large, and the curvature of the bottle body should be small. Such products have good stability and large quantity. If the in mold label is adopted, the calibrated watch box and sensor can be sent back to the customer while saving a lot of costs, which fully reflects the other advantages of the in mold label

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