Carton using hot stamping process has two purposes, one is to lend it to improve the added value of the packaged product, the second is to give the packaged product a high degree of anti-counterfeiting, while hot stamping to show the personalization of the product packaging and safety and environmental protection. There are many factors affecting the effect of carton hot stamping, such as hot stamping equipment, hot stamping plate, hot stamping material, hot stamping temperature, hot stamping pressure, hot stamping speed and so on.
01Stamping equipment
In the carton hot stamping process, the choice of hot stamping equipment is a key factor in determining the effect of hot stamping. At present, the more common hot stamping machine, from the working principle is divided into flat pressure, round pressure, round pressure round 3 kinds.
In the flat stamping process, the electrochemical aluminum foil and stamping plate is the same time to achieve the embossing contact, so the larger the stamping plate is more likely to appear on the stamping or stamping issued on the flower and other phenomena. Therefore, stamping a larger layout, it is best to use round or round press flat structure of the stamping equipment in the stamping process of aluminum carbide and stamping layout is a line contact, rather than a large area of instantaneous separation and transfer, which is conducive to the uniform separation of the aluminum carbide foil layer to transfer to the prints on the better to avoid the hair flower and stamping and stamping failures. Therefore, in the carton hot stamping process, should be based on the actual situation of the selection of appropriate hot stamping equipment.02Stamping material
Stamping materials generally have aluminum foil, pigment foil, ordinary stamping foil, laser stamping foil, water pine paper stamping foil, etc., the more commonly used is aluminum foil, which is the main material for stamping, the thickness of which is generally 6 ~ 35 μm, commonly used is 12 μm. Generally speaking, the graphic information stamped on the thin aluminum foil is relatively clear, and the thicker aluminum foil often occurs in the stamping graphic information, blurring and other undesirable phenomena. Thick aluminum foils tend to have undesirable phenomena such as blurring when stamping.03Stamping plate
Carton hot stamping effect of the first factor is the hot stamping plate, only to ensure high quality hot stamping plate, can have good carton hot stamping effect. The production of hot stamping plate is mainly used in photographic corrosion process and electronic engraving technology hot stamping plate production materials commonly used copper zinc plate, silicone plate. Copper plate material is delicate, surface finish, heat transfer effect is better than the zinc plate, the use of excellent copper hot stamping plate can improve the gloss of the hot stamping graphic and outline clarity. Stamping embossed copper plate using photographic pre-coated copper plate made of new technology, the graphics are clear heat-resistant, pressure-resistant, perfect pattern, laser refractive effect can give full play to the first choice for high-grade packaging cartons. Traditional photographic corrosion technology to produce stamping plate process is simple and low-cost, mainly for text, thick lines and general image stamping. For the finer, uneven graphic thickness of the stamping plate need to use electro-engraving technology.04 Stamping temperature
Stamping temperature is the carton stamping effect of the important guarantee in the stamping operation of the most suitable temperature is the lowest and can be clear and complete transfer stamping foil as a standard. The stamping temperature of a flat stamping machine is about 110°C, while the stamping temperature of a flat or round stamping machine is 140-150°C. Usually, the most suitable temperature needs to be found out by test, if the temperature is too high, it will cause damage to the product to be stamped and blurring of the stamped image. If the stamping temperature is too low, the adhesive layer of the aluminum foil will not be melted sufficiently, and then the stamping will not be firm or the characters will be hairy or even impossible to be stamped. If stamping and embossing together, because stamping, embossing is a one-time operation is completed, so this time the stamping temperature is higher than the temperature of separate stamping, the temperature is generally controlled at about 150 ℃.05Stamping pressure
In the carton hot stamping process, hot stamping pressure is to realize the basic elements of carton hot stamping at the same time is also an important influence on the effect of carton hot stamping Therefore, the appropriate hot stamping pressure is to ensure the smooth completion of the transfer of electrochemical aluminum foil layer is an important basis. If the stamping pressure is too high, there will be paste, burrs, convex marks or coarsening faults; on the contrary, it will cause the affinity between the aluminum foil and the printed material is not good, and even the foil and paper can not be adhered to and can not be stamping foil stamping part of the shear. Generally speaking, the stamping pressure should be appropriately large to ensure that the force is sufficient and uniform, so as to ensure the complete transfer of the aluminum foil layer. However, if stamping and embossing are completed at one time, it is necessary to readjust the pressure when starting the stamping and embossing operation. The stamping pressure should be uniform on the entire stamping plate, and the stamping pressure should be uniform on the top, bottom, left and right sides, and the stamping can be started as long as there is a clear concave and convex level on the back side of the stamped paper. Due to stamping, pressing the concave and convex version is after a corrosion, corrosion of the concave plane is relatively uneven in the stamping can be appropriate according to the situation on a layer of plastic film and other elastic liner to make up for the concave and low unevenness caused by the aluminum carbide stamping can not be the ills.06Stamping speed
Stamping speed is often reflected in the stamping of paper and aluminum foil contact time, stamping speed depends on the size of the stamping area, the temperature of the stamping machine, etc., because it will directly affect the degree of firmness of stamping is also an important factor affecting the effect of stamping. If the stamping speed is too fast, then the contact time between the aluminum foil and the paper surface is reduced accordingly. The separation and transfer speed of the aluminum foil layer will be slower, there will be stamping can not be printed or the problem of blossoming; on the contrary, it will affect the quality of stamping and production efficiency. Stamping speed and stamping equipment, stamping materials, environment, the type of substrate is very much linked.
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