[China Packaging Network News] First, the definition of hot stamping
Hot stamping, scientific name of aluminum foil hot stamping, with the help of certain pressure and temperature, so that the foil or pigment foil stamping printed matter or other substrates on the approach, known as hot foil processing, commonly known as hot stamping. It is often said that the hot stamping refers to the hot stamping of the aluminum material.
Second, hot stamping principle
The essence of hot stamping is transfer. It is the technical process of transferring the picture on the surface of the aluminum foil to the substrate through the effect of heat and pressure.
When the plate is heated to a certain degree with the attached electric heating plate, it is imprinted with the aluminum foil and the paper, and the adhesive layer, metal aluminum layer and color layer attached to the polyester film are transferred by using the effect of temperature and pressure. Go to paper.
Third, hot stamping equipment
The machine that can transfer electro-foiled aluminum foil hot stamping information to the printed matter is called a stamping machine.
A. Types and Characteristics of Hot Stamping Machines
1 according to the hot stamping method is divided into:
Press flat, the hot stamping method is flat face plane.
Round press flat, its hot stamping method is hot stamping wheel to plane.
Circular press, the hot stamping method for the hot stamping roller bearing roller.
2 according to the degree of automation: manual, semi-automatic, fully automatic.
3 press the whole method points: vertical, horizontal.
B. Hot stamping machine
1 body frame, including the appearance of the fuselage and the paper delivery, delivery and so on.
2 stamping equipment, including electric hot plate, hot stamping plate, imprinting plate and bottom plate. The electric heating plate is fixed on the printing plate platform. The electric heating plate is equipped with a roundabout electric heating wire with a power of 600-250OW. The hot printing plate is a corroded copper plate or zinc plate, characterized by good heat transfer, non-deformation, pressure resistance and resistance. Grinding; Embossed plate is generally aluminum or iron plate; The bottom plate is an aluminum plate with a thickness of about 7mm, used to post hot stamping plate;
3 Electro-aluminum transfer equipment consisting of a reel, feed roll and transfer roller, anodized aluminum take-up roll and feed organization. Electro-aluminum is mounted on a take-up reel. After the stamped electro-aluminum passes between the two feed rolls, the feed roll is composed of a cam, a connecting rod, a ratchet, and a pawl. Twisting, sending roll roll intermittently, it moved the feed of aluminum, the feed interval is set to the length of the hot stamping picture. Hot stamped anodized aluminum rolls on the take-up roll.
Fourth, hot stamping information
In accordance with the type of information can be divided into: aluminum foil hot stamping, foil hot stamping, color hot stamping, metal foil hot stamping and other hot stamping foil hot stamping. The following is a brief introduction to the hot stamping of aluminum foil materials. The foil is a hot stamping material made by vacuum evaporation of a layer of metal foil on a thin film substrate.
1 The first layer is the base film layer, also called the film bottom layer, which plays the role of supporting other layers, and the thickness is 12, 16, 18, 20, 25μ polyester film or polyester.
2 The second layer is the insulation layer (detachment layer), which facilitates separation of the base film and the electro-aluminum foil during hot stamping.
3 The third layer is the dyed layer (maintenance layer): to provide a variety of color effects, together to maintain the aluminum layer.
4 The fourth layer is aluminized: reflection of light, metallic luster, vacuum aluminum plating method. The detailed principle is to place the color coated film in a vacuum chamber in a vacuum continuous aluminizing machine. Under a certain degree of vacuum, after resistance heating, the aluminum wire is melted and successively evaporated onto the color layer of the film. Aluminized layer.
5 The fifth layer is an adhesive layer that adheres the aluminized layer to substrates such as paper. Electrochemical aluminum foil is mainly gold and silver, with magnificent beauty, beautiful color, brilliant bright, easy to use and other features, suitable for hot stamping on paper, plastic, leather, coated fabrics, plexiglass, plastic and other information, It is one of the most commonly used materials for modern hot stamping.