Coating machines are used to impart functionality to films. The coating method varies depending on the type of substrate and liquid used.
With accumulated expertise and technology, we propose suitable coating methods.

• Coating methods are diverse

  A variety of combinations exist, as substrates can be uneven, prone to absorption, or repellent, and types of liquid vary from aqueous to clay-like or adhesive.
  Determining the coating method involves appropriate proposals based on experience and simulations, along with demonstrations using prototype machines.
  We collaborate closely with customers to develop machines, mainly through testing at our Technical Center.

• Thinner, more uniform coatings

  Liquid crystal films, such as those used in smartphones, are coated with ultra-thin functional materials. This provides various functions like fingerprint resistance and reduced visibility from angles.
  These coatings are at the nanometer level, and demand for thin film coatings will continue to grow.
  

• Thicker coatings, uniform drying

  Traditional techniques for thick coatings are widely used in everyday items like artificial leather and carpet backing.
  In recent years, thick film coating technology is being applied to electronic materials.
  This includes laminated ceramic capacitors, electrodes for lithium-ion secondary　batteries, and printed circuit boards.
  Our extensive experience is particularly beneficial in achieving uniform drying of thick materials.

• Fully customized

  We manufacture machines completely tailored to your needs, realizing even the smallest and most complex requests, creating "one-of-a-kind machine" for you.
  Our approach is also highly acclaimed by universities and corporate research laboratories.
  

Coating Methods

Die Coater

This method involves extruding the coating liquid from a die head, also called a die slit, to coat the substrate.
Since this makes it possible to apply a thin film without contacting the substrate, it is used in advanced fields such as optical films, functional films, and lithium-ion secondary batteries.
The film thickness is determined by the discharge amount from the die head and the speed of the transferring substrate.
The width of the die slit is set according to the viscosity of the liquid and the film thickness.


Applicable viscosity: low to high viscosity

Roll Coater

This method involves transfer coating on the substrate using a combination of high-precision rolls called coating rolls.
The types of combinations vary, including two-roll, three-roll, and reverse types.
This is the basic form of all coating methods.
The film thickness is determined by the rotation speed, rotation direction, and gap of the rolls.


Applicable viscosity: medium viscosity

Gravure Coater

This method uses an engraved roll called a gravure roll to pick up the liquid, and transfers only the amount attached to the engraved cells to the substrate.
Due to its relatively simple setup, it is widely used for paper, nonwoven fabrics, and high-performance films.
The film thickness is determined by the volume of the engraved cells, the rotation direction, and the rotation speed.
The shape of the engraved cells is adjusted by changing the roll according to the liquid viscosity and film thickness.


Applicable viscosity: low to medium viscosity

Knife Coater

This method uses a bar or pipe-shaped knife attached to the coating head to scrape off the coating liquid.
Due to its very simple setup and wide range od applicable viscosity and thickness, it can be used by anyone to achieve mirror-like coatings, making it widely used in many fields.
It is particularly effective for thick films and liquid with high viscosity, and is commonly used when producing multilayer ceramic capacitors.


Applicable viscosity: medium to high viscosity

Bar Rod Coater

This method uses a small-diameter rod called a wire bar to scrape off liquid.
Due to the low equipment cost and relatively simple setup, it is widely used for paper, nonwoven fabrics, and high-performance films.
The same mechanism is also used in batch-type research coating machines.
The film thickness is determined by the wire wrapped around the wire bar or the depth of the grooves, the rotation direction, and the rotation speed.


Applicable viscosity: low viscosity