97. According to the finished product, width classification, hot melt adhesive pre-coated film can be divided into several types?
11000mm class has 1000, 1080, 1100, 1200, a total of 4; 2800mm class has 850, 870, 880, a total of 3 kinds; 3700mm class has 700, 760, 770, 780, a total of 4 kinds; 4600mm class has 610, 620, 650,690, a total of four; 5500mm class has 500,510,520,530,540,560,570,580,590, a total of nine; 6400mm class has 410,420,430,440,450,460,470, A total of 7 kinds; 7300mm class 300,310,320,330,340,350,360,370,380,390, a total of 10; 8200m m class 200,270, a total of 2 kinds.
98. What is the basic structure of the precoat laminator?
The precoat laminating machine is a special device that combines prints with precoated plastic films. The main structure consists of four parts: unwinding the film, automatic input of the printed matter, hot pressing and compounding, and automatic winding. Compared with film machine, it does not need adhesive coating and drying part, so it has a compact structure, small size, low cost, easy operation, with the use of start-up, production flexibility, and high efficiency. The compounding of the precoat film and the paper print can be performed by hot pressing. Suitable for all kinds of laminating machine, laminating machine, laminating machine with hot pressing function. That is, the bridge type laminating laminating machine with glued wet composite technology does not need to be modified, and it can be completely coated with a precoating film.
99. What are the steps in the process of precoat?
The pre-coating process includes five steps: discharge, start up, transport of printed matter, rewinding, and slitting.
100. What is the content of the precoating film discharge operation?
Pass the precoat film through the feed rod and place it on the discharge shaft seat. Pass through the straight flat roll, bow flattening roll and level. 101. What is the boot operation of the precoat? Start the main unit and the heating device to rotate the heating drum to raise the temperature to keep the heat even; raise the pressure so that the pressure rubber roller comes into contact with the heating roller and rotate and preheat.
102. What is the content of the print job of the precoat film?
Do a good job of finishing the surface of the printed matter, adjust the rules and plates, and automatically or manually extend the paper.
103. What is the content of the precoating film winding operation?
Start the rewinding device, wind the compound on the take-up reel, and control the proper tension.
104. What is the content of the pre-coating film slitting operation?
The integrated product will be cut into sheets and cut and stored. The quality will be checked and the quantity will be counted.
105. What are the technical parameters of the pre-coating process?
The use of pre-coated film as long as the master temperature, pressure, speed, three technical parameters, can basically guarantee the normal production of film. Temperature (actual temperature of the heating roller surface): General product 85 ~ 95 °C; special products (ink printing layer thickness, deep color, high basis weight, water content) 90 ~ 105 °C. Pressure: 10 to 15 MPa; Speed: (printing speed) 8 to 12 m/min.
106. What are the main factors affecting the quality of the coating?
In addition to temperature, pressure, speed (adhesive coating, printing speed) and other process parameters, the two main factors affecting the quality of the film are: 1 print ink layer conditions on the quality of the film. 2 The effect of environmental temperature and humidity on the quality of the coating film in the film shop.
107. What are the conditions of ink layers in printed matter that have an impact on film quality?
The effect on the quality of the coating is mainly the influence on the adhesive strength of the printed matter and the film. The condition of the ink layer in the printed matter mainly refers to the nature of the paper, the ink properties, the thickness of the ink layer, the area of ​​the graphic text, and the density of the printed graphic and so on.
108. What is the effect of ink additives on film quality?
1 The role of ink diluting agent, commonly used ink diluting agents are white ink, weili oil and bright light paste. In the white ink, there are obvious silt particles, which are not tightly bound to the binder. After printing, these pigment particles will float on the surface of the paper and hinder the adhesion. Verite oil is made by rolling aluminum hydroxide and binder. Due to the light weight of aluminum hydroxide, it tends to float on the surface of the ink layer after printing. When the film is covered, a barrier layer is formed between the adhesive and the ink layer, resulting in stickiness. Can not close or blistering. The glossy pulp is made of resin, dry vegetable oil, drier, etc. The texture is delicate and the film is bright. It has similar properties with the conjugated multi-bond terpene resin as the main component, and they have good affinity and can firmly adsorb the polypropylene film on the ink surface. 2 dry oil added. The addition of dry oil to the ink can speed up the drying of the print, but the dry oil adds a large amount of oil, making it easy to make the surface of the ink layer into a glossy, smooth, low-interfacial layer. The adhesive is difficult to wet and infiltrate, affecting the fastness of the film. Therefore, To control the amount of dry oil added.
109. What is the effect of powder spraying on the quality of the coating?
Offset printing adopts a dusting process to prevent the printed matter from getting dirty, and a layer of fine particles is formed on the surface of the powdered ink. The coating film does not adhere to the ink layer at every place but binds to these powders to form a false-stick phenomenon, which seriously affects the film quality. Therefore, the product to be covered should avoid the use of dusting technology, printed matter that has been dusted, and dry wipes on a dry basis with a dry cloth. The nature of the ink stickiness of the printed product is due to the ink. To solve this problem, the ink must be improved in the process, and the ink is added in proportion to 10% of the stickiness agent, which is very effective for preventing stickiness. After the ink is added with the viscose, it not only prevents stickiness, does not affect the hue and color saturation of the printed product, but also makes the ink layer brighter, the dots are clearer, and it is also more convenient for post-printing processing procedures such as calendering, laminating, hot stamping. Wait. Viscosity adhesives can be used as an alternative to oily, dusty, and anti-adhesive dirty materials.
(to be continued)
(Author: The Galaxy Beijing Institute of Graphic Communication)
Our Styling Chair is modern, sleek and practical. Designed with no seams and a floating back, there is no place for hair to get stuck which makes clean up between clients extremely easy.
The gently scooped seat, T-bar footrest, and floating back combine to make this modern styling chair a real eye-catcher. This high-comfort armchair, We use classic heavy duty and durable Barber Chair design, you can choose leathers and colors based on your requirement!
Assurance provided both for our products and after-sales services If you are looking for a company that offer you greatest service for lifetime, then contact us now!
Salon Styling Chairs,Portable Styling Chair,Hydraulic Styling Chair,Shampoo Styling Chair
TOM SPA BEAUTY SALON EQUIPMENT CO.,LTD , https://www.tomspabeauty.com