An omni-directional solution for the sticker label in summer
Beijing recently strange cool, air conditioning at night do not need to open the degree, move on the 40 degrees of high temperature of the partners, are you all good?
Since July, tag Jun has shared with you all notices in the process of production and use of summer sticky labels. Today, report summary is coming. In a nutshell, today's collection is enough.
Temperature and humidity
The storage temperature of the dry glue warehouse should not exceed 25 degrees centigrade, and it is best at about 21. In particular, it should be noted that the humidity in the warehouse should not be too high and kept below 60%. There is no condition in which a dehumidifier can be temporarily placed in the warehouse to reduce the humidity of the warehouse. Of course, the control device of constant temperature and humidity is a long-term and effective measure.
The temperature and humidity control of the processing site is also important, and the paper adhesive material is very sensitive to the humidity. The more difficult it is to process the hot melt adhesive material in the case of higher temperature.
The humid environment in summer is the culprit to damp the surface on the surface. When the surface is dampened on the surface, the sticked label is bound to rise because of the water vapor.
After labeling products on the moist environment, the exposed surface of a label will absorb moisture and become wrinkled up drum.
If the temperature and humidity control can not be achieved when the product's stock is limited after the labeling, it can be considered for the paper label with moisture-proof oil or film mulching.
Inventory time
The storage time of the adhesive material should be as short as possible. Master the principle of advanced first out and backward.
Special attention should be paid to not using the wrong season, summer materials are used up and winter materials are used out in winter.
There is no material on the machine. Do not open the closed package in advance and when the machine will be opened when. Materials that are not used up and the materials that need to be processed in the next process after printing should be sealed and sealed in time.
Selection of glue
For some of the sticker surfaces that are larger in the summer, there may be a label that may be used at high temperatures for a long time. Or when the transportation is in the sun for a long time, the adhesive label of hot melt adhesive should be avoided as much as possible.
Because the characteristics of hot glue glue are: the initial viscosity is large and the glue characteristic curve shows that the stickiness of the glue will not rise after 4~5 hours. The difference in viscosity of 4~5 hours is less than that of initial viscosity.
When the temperature of the environment exceeds 45 degrees C, the viscosity of the glue begins to decrease. The reason is that the cohesive force of the glue drops and the fluidity is strengthened.
When the adhesive material is die cutting in summer, when the temperature of the environment is high, the hot melt adhesive material is more difficult than the water glue non dry glue material. This is because the hot melt glue drawing is longer than the water glue, and the adhesive reflux is quicker.
When the fluidity of hot melt adhesive is strengthened in summer, the drawing phenomenon is more obvious. When the die cutting is discarded, the total feeling glue layer is not completely cut off, the drawing is obvious, and the waste belt is marked. Therefore, when the hot melt adhesive is used for printing in summer, the temperature of the field is controlled at 21 degrees centigrade as much as possible for the processing of hot melt adhesive materials.
Initial viscosity
As the fluidity of the glue is very good in summer, the conversion rate of the initial stickiness of the adhesive to the ultimate viscosity is much faster than that of the other seasons. When the labeling needs to be relabeled after the labeling, the shorter the time the labeling is, the easier it is to uncover the replacement.
Frozen food
For the operation of frozen food after the labeling, it is necessary to understand clearly the three elements for the use of the sticker for the non dry glue.
A, minimum labeling temperature: the temperature of the frozen stickers on the surface should not be lower than the lowest labeling temperature marked on this technology.
B, initial stickiness: stickiness when the label is just attached. According to the roughness and surface energy of the surface, the stickiness of the sticker is different, but it is not the true stickiness of the glue.
C and final viscosity: after 24 hours, the glue is converted from the initial viscosity to the final viscosity, and the final viscosity is the real stickiness of the glue.
The above three elements indicate that the labeling is over the allowable temperature range. After labeling, there must be a time interval from initial viscosity to final viscosity (which must be above the allowable temperature range). The products that have just been labeled can not be immediately sent to the environment below the lowest labeling temperature. It can only be used within 24 hours to be used in the use environment (the time in which the summer temperature is high can be properly shortened).
Summer tag series is coming to an end. What other questions do you want to know? Welcome to chat with Mr. tag. What technology topics do you want to share with us next Tuesday? Let me think about it. See you next week.
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specializes in producing food plastic composite packaging bags
