Common four precision coating methods

Date:2021-09-17    Visitors:0    Author:admin
Common four precision coating methods

There are many kinds of products that coat the production and production, from the shadow of people's livelihood supplies to cutting-edge technology, especially when producing high-precision coating products, we need to carry out high quality volume of coating technology technology, we focus on Introduction to three common precision coating skills, line comparison, for reference.


Precision electronic products are developed by coating technology, which covers very many technologies. If the technical critical perspective, the importance is as follows:
• Quality, Formulation 25%
• Coating technology 35%
• Transfer technology (KNOW-HOW) 25%

• 15% of equipment technology (Equipment)


First, small distension coating


The microplexing coated coated is netizen, and the diameter is generally at 120mm- (between D50mm, so it is called micro gravure coating, which is a direction, contactless coating method, the direction of rotation of micro-coating In contrast, the film is not pressed against the coating. The traditional gravure coating method, whether directly coating or reverse coating, back pressure rubber, and rubber diameter The substantially the same row of ribbed is suspended because the material film is pressed between rubber mixing and mesh, it is likely that there is a wrinkle, cracks such as wrinkles and cracks in the coating surface, and the two-in-pressure contact points are coated due to mechanical, air pressure. The quality of the cloth is affected. The micro gravure coating is a method of coating M-style, which means that there is no back pressure rubber homewhere, so some potential hypothyrin produced due to back pressure is eliminated.


Micro-level advantage
• The very thin coating can be applied to a very thin material. Due to the absence of no rubber printing, wrinkles such as the coating surface;
• Since there is no back pressure, the edge portion of the material film can also be applied, without worrying about the rubber to apply to back pressure.
• Since the doctor blade is slightly contacted and the wear of the net is small;
• Small weight in diameter, light weight, coating different coating, more convenient to replace it;

• The reverse coating can obtain a relatively flat coating, and the coating amount is evenly distributed.


Digital disadvantage
• The micro gravure coated reservoir is in the case of the glue, and the microile mix is only in contact with the overflowed liquid, so it cannot be fully utilized, thus causing A waste, the amount of plastic liquid is about 10kg;
• If you are cleaning, if you are cleaned, it is easy to cause tanks and rust, and difficult to remove;
• Due to the coating, the glue of the storage tank is exposed to the air, so dust and particulate matter in the air are easily dropped into the storage tank when the coating is applied, and the quality of the coating has a certain effect;

• Micro gravure coated supply is more complicated, cleaning, and disassembling dagger, often takes 1 · 2 hours.


Micro gravure application

Shading film, various optical films, lithium batteries, various composite tape, Philippine film, protective film.


Second, comma scraper coating

The comma-coated coating is characterized by a combination of blade scraper and mixed blade. The impact of the glue thickness is smaller than the blade, the thickness of the coating is easy to adjust, and high viscosity gum can be applied. When the width is large, it is possible to adjust laterally.


Advant in the advantage of coating coating
• The intensity of the comma worm is high, the hardness is small, the cutting edge is small, and the pneumatic fine-tuning mechanism can be used to adjust the position of the wiper, the coating amount control and the precipitation of the squeegee;

• When the coating can be coated, when the coating is applied, the collapse is from the upper and lower flow to the blades and the film film, so that the glue can be sufficiently used, and there is substantially no waste of the plastic liquid.


Disadvantages of comma coating

• Commercing coated coating quality and its various components have a large operation relationship, especially for driving motors and rotating the transmissions of the mushroom, often causes uneven coating, easy to appear horizontally or portrait When the irregular stripes, when coating, the gum is easily out of the baffle and the gap between the transmission, the sealing property is not complete, and when the coating is applied, it is necessary to manpower constantly withdraw the glue of the semi-storage tank. To ensure a uniform distribution of the collapse. Commerges coated application of various optical films, protective film, Philippine forest film, matte soft packaging film.


Third, squeezed squeezed coating (slot-die coating)

Slip extrusion coater is a common high-precision coating method, and the coating collapse is sent from the memory to the nozzle by the supply pipeline pressure, and the collapse is ejected from the nozzle, thereby transferring to coating Substrate.


Advantages of squeezing coating
• Good coating effect, the coating amount is flexible by coating the micro-adjustment of the scraper, and the coating accuracy is high;
• Can coat discontinuous modes, and the range of coating can be freely adjusted, no need to use the baffle, no stains different from the thickness of the edge thickness;
• Cleaning removal is relatively easy;

• It helps to maintain a clean level, the channel of the overall flow of the collant can be sealed, and the entry of the pollutants can be sealed.


Disadvantages of squeezing coating
• Some of the Slot-Die coated heads are more complicated, requiring high glue, coating mix, traction shoes, and scraper processing accuracy, so cost is higher than other coating methods;

• Due to high precision, actual use and difficult operation.


Application of squeezing squeezing coating

High-end optical film, window film, special name for high end membrane.


Fourth, sticks of roll-to-roll precision coating

The so-called roll-to-roll precision coating technology can be applied to various industries such as IC, PCB, photoelectric, people's livelihood, and medical care, from the product (such as stationery tape) to medical tape (beauty, healing) To electronic tape (IC cutting, PCB soldering), as well as photoelectric tape (optical glue with LCD), etc., is a product developed by precision coating technology platform.


It is a coating technique that presses and transfers the coating along the mixed slide along the mixed slide, which is fast, the coating film is width, etc. Features, representing the future direction of wet coating


Advantages: High coating film; good film thickness; wide ladc scale; coating defect (closed loop system); high coating utilization; multilayer coating can be carried out simultaneously.


Disadvantages: High equipment cost; high requirements for operator technical knowledge; high installation and operation requirements; high maintenance cost of coating head