Doctor Blade Applicator

The drawdown bar Coater uses a rotating metal wheel to drive the sample, which is evenly spread by a blade to form a color band with gradually decreasing thickness. It is used for the color development, comparison, and opacity testing of coatings and inks, allowing observation of the relationship between color and film thickness during color matching and quality inspection.
Selection
When selecting, consider the corrosion resistance of the wheel material, the flatness of the blade's contact with the wheel surface, and the stability of the rotational speed to meet standard methods. Determine the groove width based on the sample viscosity, choose manual or electric models according to testing needs, and regularly verify the accuracy of the thickness scale.

Terms

Standards

Instruments

Using Metering Rod & doctor blade double Spreader mode, Spreader accuracy up to +/- 0.001mm, Spreader rate 5~ 200mm/s adjustable, fixed substrate by vacuum adsorption to ensure film uniformity and repRoducibility.

$ 2736.00

Spreader speed 5~ 180mm/s, Spreader area 400 * 300mm, using Metering Rod & doctor blade and vacuum adsorption system to ensure Spreader uniformity and Stability, can be customized automatic inking function.

$ 9755.00

Using Metering Rod & doctor blade dual Spreader method, Spreader accuracy is up to +/- 10μm, Film thickness range is 0-5000μm. Spreader rate and stroke are controlled by vacuum adsorption to fix the substrate, and the touch screen can effectively improve film repRoducibility and conformity.

$ 3462.00

Spreader accuracy of +/- 0.003mm, Film thickness range of 0~ 10mm, equipped with automatic feeding system and vacuum adsorption, to achieve stable Spreader and efficient operation.

$ 8949.00

Spreader speed 5-180mm/s adjustable, wire Rod Spreader accuracy +/- 0.001mm, using touch screen control and mechanical fixture to ensure stable and reliable Spreader process.

$ 2010.00

Spreader speed 5~ 200mm/s continuously variable speed, scraper Spreader accuracy +/- 0.003mm, support heating temperature RT +~ 180 ℃, baseplate heating method to ensure stable Spreader effect, improve experimental conformity.

$ 7658.00

Spreader accuracy of +/- 0.001mm and +/- 0.003mm respectively, support 5~ 200mm/s stepless speed change and vacuum adsorption fixation, improve coating conformity.

$ 7141.00

With bar and Drawdown blade two coating methods, coating speed 1-300mm/s stepless speed regulation, Blade Coating thickness 0.1-10 mm, using clamshell design for easy cleaning, equipped with High Accuracy Film Applicator to ensure Spreader uniformity.

$ 5237.00

Adopt bar and drawdown blade double coating method, coating speed 1~ 300mm/s stepless speed regulation, Spreader accuracy of +/- 0.003mm, clamshell drawdown blade head design is easy to clean, equipped with servo motor to ensure stable operation.

$ 5721.00

Servo motor to ensure stable operation, film accuracy of +/- 0.003mm, support 1~ 300mm/s stepless speed regulation and Vacuum chuck fixed, clamshell drawdown blade for quick cleaning and maintenance.

$ 4108.00

With bar and drawdown blade two coating methods, coating speed 1~ 300mm/s stepless speed regulation, clamshell drawdown blade design for easy cleaning, bar accuracy of +/- 0.001mm, Blade Coating thickness range of 0.1~ 10mm, effective coating area 1500 * 300mm.

$ 7335.00

The application width can be adjusted freely, and the drawdown blade Coater can be adapted to meet different experimental testing needs and realize flexible film operation.

$ 154.00

Adopt bar and drawdown blade double coating method, coating speed 1~ 300mm/s stepless speed regulation, effective coating area 1000 * 300mm, clamshell drawdown blade design is easy to clean, servo motor drive to ensure stable operation.

$ 7012.00

Adopt bar and Drawdown blade double coating method, coating speed 1~ 300mm/s stepless speed regulation, bar accuracy +/- 0.001mm, equipped with clamshell Drawdown blade head for easy cleaning, Glass countertop heat resistance 600 ℃.

$ 5560.00

With bar and Drawdown blade dual Spreader function, coating speed 1-300mm/s stepless speed regulation, film thickness control accuracy of +/- 0.001mm, clamshell Drawdown blade design for easy cleaning, support application length and speed free adjustment.

$ 5721.00

Articles

How to choose a laboratory coater? Which one should you buy: wire bar, scraper, or slot die?
This article introduces three methods for selecting laboratory coating machines: wire bar coating is suitable for low-viscosity coatings, offering low cost and simple operation; blade coating is ideal for medium-to-high viscosity slurries or those containing particles, with a wide range of film thickness control; slot-die coating provides the highest precision and is suitable for high-end applications such as electronic films.
The effect of the substrate fixing method on coating uniformity in a vacuum adsorption blade coating tester.
This article discusses the impact of different substrate fixing methods on coating uniformity in a vacuum-assisted knife-over-roll coating tester. It compares four methods—vacuum adsorption, electrostatic adsorption, mechanical clamping, and adhesive fixing—focusing on their mechanical principles and limitations.
Comparison of Coating Accuracy between Laboratory Blade Coater and Slot Die Coater
This article compares the coating precision of blade coaters and slot-die coaters in the laboratory. Blade coaters are suitable for thick coatings, with simple operation but relatively large uniformity errors; slot-die coaters offer higher precision and better uniformity for thin coatings. The choice of equipment depends on coating thickness and precision requirements.
Application of Laboratory Scraper Heating Coating Machine in Hot Melt Adhesive Coating
This article introduces the application of a laboratory blade heating coating machine in hot melt adhesive coating. It first explains the coating process and principles, including three stages—heat conduction, fluid shear, and surface wetting—as well as the influence of temperature on adhesive viscosity.
Application of Gravure Printing Proofer in Water-based Ink Proofing and Pinhole Defect Evaluation
This article introduces how the gravure printability tester is used for water-based ink proofing and pinhole defect evaluation. Water-based inks are environmentally friendly but prone to tiny pinhole defects. The instrument enables standardized sample preparation and reduces human interference by controlling parameters such as cell depth and doctor blade angle.
Standard ink film preparation with a blade coater before tack testing of offset printing inks.
This article introduces the method of preparing a standard ink film using a blade coater before testing the tackiness of offset printing inks. It explains the principle of controlling ink film thickness by adjusting the blade gap and details the operational steps from securing the substrate and applying the ink to completing the coating process.
Study on the Dispersion Uniformity of Blade Coating Machines in High-Load Electrode Slurry Coating
This article investigates how to optimize the dispersion uniformity of coatings by adjusting process parameters when using a blade coater to handle high-load electrode slurries.
The wire bar coater with heating and vacuum adsorption is used for the preparation of perovskite solar cell layers.
This article introduces a new technique for preparing the light-absorbing layer of perovskite solar cells: a wire-bar coater with heating and vacuum adsorption capabilities.
Heating and blade coating of gel electrolyte films for zinc-ion batteries.
This article introduces the heating doctor-blade coating method for preparing gel electrolyte films in zinc-ion batteries. The method involves spreading a slurry onto a substrate using a doctor blade, followed by heating to evaporate the solvent and form a film.
Blade-coating preparation of hole transport layers for perovskite solar cells.
This article introduces the method of preparing the hole transport layer for perovskite solar cells using the doctor-blade coating technique. The doctor-blade coating method involves spreading the solution evenly on the substrate with a blade to form a thin film, making it suitable for large-scale production.
Preparation of composite films by coating mechanism for electrical performance experimental characterization
This article introduces the method of preparing composite films using a film coating machine and testing their electrical properties. The film coating machine evenly spreads the slurry with a blade, controlling thickness and uniformity. The preparation process includes raw material preparation, substrate treatment, coating, and curing.
Operating Specifications and Result Interpretation of Paint Fineness Gauges
The fineness gauge is used to measure the dispersion of particles in paint. During operation, the sample should be applied to the groove under standard conditions, and a scraper is used to spread it evenly to form a wet film. The particle visibility is then observed under appropriate lighting, and the fineness value is read from the corresponding scale.
Application of Two-Step Method with Pre-Coating and Fine-Coating in Eliminating Bubble Defects for Dual-Blade Coater
The dual-blade coater employs a two-step method of pre-coating and precision coating to eliminate bubble defects during the coating process. In the pre-coating stage, high shear force is applied to break the bubbles in the slurry, causing them to rupture and rise to the surface. The precision coating stage then precisely controls the coating thickness, removing any remaining bubbles to form a uniform wet film.
Experimental Verification of Stroke Accuracy on Coating Thickness Repeatability for Desktop Automatic Film Applicators.
This article investigates the influence of the stroke accuracy of a desktop automatic coating machine on the repeatability of coating thickness. The experiment monitored the blade position deviation using high-precision sensors and measured the coating thickness, revealing that smaller stroke deviations lead to better repeatability in coating thickness.
Copper nanowire and zinc oxide thin film preparation coater
The coating machine is a key device for preparing copper nanowires and zinc oxide thin films, which uniformly coats slurry onto a substrate through methods such as blade coating to form a thin film.