The official name of the medicinal blister-packed aluminum foil before 2015 is “aluminum foil for pharmaceutical packagingâ€, which is commonly referred to as “PTP aluminum foil†in the industry. Its surface carries important information about the drug, in addition to the name of the drug, the dose, etc. Drug batch number and effective time, etc. In order to improve the firmness of the graphic information on the surface of PTP aluminum foil and strengthen the anti-counterfeiting function, our company has developed a PTP aluminum foil which can be laser-coded, which meets the requirements of customers and achieves the goal of saving production cost. Below, the author will introduce the R & D background, structural characteristics, implementation plans, advantages, etc. of the available laser coding PTP aluminum foil, hoping to bring some inspiration to the industry.
Product development background
The basic structure of the conventional PTP aluminum foil is made of a hard or soft aluminum foil having a thickness of 20 to 60 μm as a substrate, and one side of the aluminum foil. After printing the graphic, a layer of protective agent is applied, the main function is to protect the printing ink, and at the same time increase the water resistance and oxidation resistance of the aluminum foil; the other side of the aluminum foil is coated with an adhesive which can be heat-sealed with PVC or PVDC. The coding information of the surface of PTP aluminum foil is generally adopted by imprinting or printing and coding, but both coding methods have different degrees of disadvantages.
The disadvantage of imprinting is that special molds are needed, and the surface of the PTP aluminum foil needs to have enough coding space, which greatly reduces the size. Effective utilization of packaging materials, packaging materials for pharmaceutical large amount, the long run would cost a small fortune; coding disadvantage that printing inks used have certain polluting, more importantly, It is easy for the printed pattern to be erased by humans or accidents without the packaging being destroyed. The criminals may use this shortcoming to tamper with the drug information, which may lead to the situation of counterfeit drugs.
With the continuous development of electronic technology, laser technology and computer technology can be organically combined. Users can realize laser coding output by programming on a computer, which has led to the advent of laser coders. The working principle of the laser coder is to collect the laser at a very high energy density on the surface of the object to be engraved, to vaporize and etch the material of the surface of the object to be engraved, and to control the effective displacement of the laser beam. Engraving pre-designed patterns or text.
The laser can form a very thin beam with a minimum line width of 0.1 mm on the surface of the material, and any pattern and text displayed on the screen can be immediately restored on the surface of the specified material. Taking PTP aluminum foil as an example, in order to realize laser coding on the surface, it is only necessary to first print a color block of appropriate size on the PTP aluminum foil, and then laser-burn the PTP aluminum foil surface ink to be on the color block. Engraving text or numbers with a hollow effect.
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