![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Abstract : This paper analyzes the characteristics of the aluminum foil foil gravure printing ink for flexible packaging and its influencing factors for printing and coating. The principle of controlling the optimal coating amount of the adhesive for gravure aluminum foil is discussed.
At present, the use of blister packs for the packaging of pharmaceutical tablets and capsules is becoming more and more common. Pharmaceutical blister packs, also known as PTP, are based on pure aluminum foil for industrial use. On medical aluminum foil printing and coating machines, gravure printing techniques and roller coating methods are used to print text patterns on the surface of aluminum foil and apply a protective layer. The bonding process is applied on the other side of the aluminum second. The brief process flow is: aluminum foil unwinding - gravure printing - drying - coating protection - drying - adhesive coating - drying - aluminum foil winding. During the entire production process, the surface quality of the gravure printing text pattern and the heat seal strength of the adhesive layer are required to be strictly controlled in the process operation. Therefore, the use characteristics of the printing ink and the coating amount of the adhesive layer are used herein. Controls two aspects, expounds how to master the characteristics of aluminum foil inks and analyze the factors that affect the aluminum foil adhesive coating amount and control methods.
First, the characteristics of aluminum foil printing inks Printing inks used in aluminum foil are mainly divided into two categories: one is a polyamide ink, this ink is very good adhesion, dispersion, gloss, Wear resistance, solvent release, and because of its soft, it is mostly used in the printing of plastic film, when used in aluminum foil as the substrate for printing, the excellent performance of the ink can be expressed, and its heat resistance Also to meet the requirements of aluminum foil printing. The other type is a composite aluminum foil ink mainly composed of vinyl chloride-vinyl acetate copolymer resin/acrylic acid resin. Its characteristics are bright color, high concentration, particularly strong adhesion to aluminum foil, and good transparency. In the selection of pigments, heavy metals and other toxic components are not used, and they are widely used in the packaging of medicines and foods. When using it, you should pay attention to the following issues:
1. Drying changes The drying of gravure printing inks is accomplished by solvent evaporation, which promotes drying of the ink by the action of heat and wind. The drying speed of the ink should be matched with the printing speed and the drying device and adjusted based on them. When the drying is too slow, the quick-drying solvent or quick-drying retardant can be added to the ink, and the ink can be added when the drying is too fast. Slow-drying or slow-drying diluent.
2. In order to ensure that the ink does not precipitate during storage, the viscosity of the ink is generally high. When printing, the ink should be diluted to achieve the required viscosity and fluidity. This depends on the machine's structure and printing speed. The No. 4 viscosity cup measures the viscosity of the ink and the machine speed is between 20-80 m/min. Viscosity between 22-28 seconds. The more viscous ink, when using a large amount of release agent, should be evenly stirred, so that the release agent is evenly distributed in the ink. Since the temperature and humidity in the room have an influence on the concentration of the ink, it is preferable to use an ink concentration detector to determine the amount of the added solvent, and to measure the concentration of the ink at regular intervals according to changes in temperature and humidity. When the gravure printing foil is used, if the ink concentration is too low, the printed text pattern will not be bright and the gravure printing will occur. If the ink density is too high, cracks will appear at the pattern, which will not only waste ink, but also cause prints. The surface is uneven and not beautiful.
Second, the factors affecting the amount of aluminum foil printing coating and its control The effect of the number, depth, and shape of the anilox roller on the amount of coating The majority of pharmaceutical aluminum foil printing and coating equipment uses an anilox roller coating device, also known as a wire coating method. The anilox roller is composed of a hole and a net wall. The pit on the roller is usually called a net hole, and the high part is secondarily a net wall or a network cable. The ratio of wall to wall is about 1:5. After processing, the anilox roller is coated with a hard chromium layer with a thickness of 0.015-0.02 mm to increase the surface hardness of the anilox roller. The hardness value is HRC62-65. When using the aluminum foil device for printing and coating, the construction principle and working state of the anilox roller are as follows: when the adhesive is filled in the cell of the anilox roller, the anilox roller rotates when the cell is away from the adhesive liquid After the surface, the liquid on the smooth surface of the roller is scraped off by a scraper, leaving only the recessed mesh in the ... pyramidal anilox roll, that is, 200 cells per inch, and about 8 cells per mm. The binder has a storage capacity of about 0.5 pounds per 1000 square feet, ie 2.4 g/m2, while the 24 triangular-threaded anilox roll has a binder inventory of 13 pounds per 1000 square feet, ie 63 g/g. Square meters. (To be continued)
At present, the use of blister packs for the packaging of pharmaceutical tablets and capsules is becoming more and more common. Pharmaceutical blister packs, also known as PTP, are based on pure aluminum foil for industrial use. On medical aluminum foil printing and coating machines, gravure printing techniques and roller coating methods are used to print text patterns on the surface of aluminum foil and apply a protective layer. The bonding process is applied on the other side of the aluminum second. The brief process flow is: aluminum foil unwinding - gravure printing - drying - coating protection - drying - adhesive coating - drying - aluminum foil winding. During the entire production process, the surface quality of the gravure printing text pattern and the heat seal strength of the adhesive layer are required to be strictly controlled in the process operation. Therefore, the use characteristics of the printing ink and the coating amount of the adhesive layer are used herein. Controls two aspects, expounds how to master the characteristics of aluminum foil inks and analyze the factors that affect the aluminum foil adhesive coating amount and control methods.
First, the characteristics of aluminum foil printing inks Printing inks used in aluminum foil are mainly divided into two categories: one is a polyamide ink, this ink is very good adhesion, dispersion, gloss, Wear resistance, solvent release, and because of its soft, it is mostly used in the printing of plastic film, when used in aluminum foil as the substrate for printing, the excellent performance of the ink can be expressed, and its heat resistance Also to meet the requirements of aluminum foil printing. The other type is a composite aluminum foil ink mainly composed of vinyl chloride-vinyl acetate copolymer resin/acrylic acid resin. Its characteristics are bright color, high concentration, particularly strong adhesion to aluminum foil, and good transparency. In the selection of pigments, heavy metals and other toxic components are not used, and they are widely used in the packaging of medicines and foods. When using it, you should pay attention to the following issues:
1. Drying changes The drying of gravure printing inks is accomplished by solvent evaporation, which promotes drying of the ink by the action of heat and wind. The drying speed of the ink should be matched with the printing speed and the drying device and adjusted based on them. When the drying is too slow, the quick-drying solvent or quick-drying retardant can be added to the ink, and the ink can be added when the drying is too fast. Slow-drying or slow-drying diluent.
2. In order to ensure that the ink does not precipitate during storage, the viscosity of the ink is generally high. When printing, the ink should be diluted to achieve the required viscosity and fluidity. This depends on the machine's structure and printing speed. The No. 4 viscosity cup measures the viscosity of the ink and the machine speed is between 20-80 m/min. Viscosity between 22-28 seconds. The more viscous ink, when using a large amount of release agent, should be evenly stirred, so that the release agent is evenly distributed in the ink. Since the temperature and humidity in the room have an influence on the concentration of the ink, it is preferable to use an ink concentration detector to determine the amount of the added solvent, and to measure the concentration of the ink at regular intervals according to changes in temperature and humidity. When the gravure printing foil is used, if the ink concentration is too low, the printed text pattern will not be bright and the gravure printing will occur. If the ink density is too high, cracks will appear at the pattern, which will not only waste ink, but also cause prints. The surface is uneven and not beautiful.
Second, the factors affecting the amount of aluminum foil printing coating and its control The effect of the number, depth, and shape of the anilox roller on the amount of coating The majority of pharmaceutical aluminum foil printing and coating equipment uses an anilox roller coating device, also known as a wire coating method. The anilox roller is composed of a hole and a net wall. The pit on the roller is usually called a net hole, and the high part is secondarily a net wall or a network cable. The ratio of wall to wall is about 1:5. After processing, the anilox roller is coated with a hard chromium layer with a thickness of 0.015-0.02 mm to increase the surface hardness of the anilox roller. The hardness value is HRC62-65. When using the aluminum foil device for printing and coating, the construction principle and working state of the anilox roller are as follows: when the adhesive is filled in the cell of the anilox roller, the anilox roller rotates when the cell is away from the adhesive liquid After the surface, the liquid on the smooth surface of the roller is scraped off by a scraper, leaving only the recessed mesh in the ... pyramidal anilox roll, that is, 200 cells per inch, and about 8 cells per mm. The binder has a storage capacity of about 0.5 pounds per 1000 square feet, ie 2.4 g/m2, while the 24 triangular-threaded anilox roll has a binder inventory of 13 pounds per 1000 square feet, ie 63 g/g. Square meters. (To be continued)
Non Stick Cookware manufacturer in China
As a non stick cookware manufacturer with more than 20 years experience,we always offer our best service,high-quality and competitive prices to all of our clients.The cookware with non stick coating can minimize food sticking to the pan surface. Non sick cookware is easier to clean than most non-coated pans,and require little or no additional oil or fat to prevent sticking,a property that helps to produce lower fat food.You can send us your standard of the non stick coating and design the brand of non stick coating of what you need. Please discuss with us,we will meet all your need.
Non Stick Cookware
Non Stick Cookware,Non Stick Pan,Non Stick Cookware Set,Non Stick Cooker
Jiangmen Yuesheng Metal Products Co., Ltd. , http://www.bestgain-hk.com