Differential Coater

The differential applicator controls the transfer amount of coating through precisely machined groove structures, forming a uniform wet film on the substrate surface. During operation, the blade scrapes excess coating back into the storage area, while the coating retained in the grooves is transferred to the substrate through the coating action. It is used in laboratories to prepare coating film samples of standard thickness for performance verification of coatings in conjunction with dry film thickness gauges.
Selection
Select the groove depth based on the viscosity of the coating to be tested, typically within the range of 25-250 μm. Use stainless steel for water-based coatings, and stainless steel or electroplated versions for solvent-based coatings. The flatness of the substrate affects the coating application results, so match the scraping speed with the leveling properties of the coating. Perform multiple parallel tests during verification.

Terms

Instruments

The Spin Coater is controlled by touch screen, the acceleration range is 100~ 4000rpm/s, and the speed can be automatically corrected by A/K selection. The motor torque is large and the operation is smooth, which is suitable for the assembly line process.

$ 2494.00

It is designed with a digital thousand-minute differentiator, with a dual unit display of μm and mils, with a range of 0~ 10mm and a Graduation of 1μm, to achieve precise thickness control.

$ 154.00

Temperature range -40~ 600 ℃, DSC resolution 0.01μW, support FTC and STC experimental mode, 12-order program temperature control and dual atmosphere automatic switching, improve Test accuracy and experimental flexibility.

$ 9062.00

Using imported E-even Sensor, accuracy of 0.001mw, Sensitivity, good repeability; Support multi-atmosphere automatic switching, temperature range RT-600 ℃, Glass transformation, melting point, oxidation induction period and other tests.

$ 8949.00

Temperature range -10 ℃ to 600 ℃, support FTC and STC dual mode temperature control, 12-order program temperature control and 1~ 10Hz sampling Frequency, with independent dual temperature sensor and intelligent atmosphere switching function.

$ 5027.00

Adopt imported E-couple Sensor, Sensitivity up to 0.01uW, temperature accuracy +/- 0.01 ℃. The new metal Furnace structure improves Baseline stability, three-way atmosphere control supports fast switching, and has fault self-check and overload protection functions.

$ 9433.00

Adopt imported E-couple Sensor, Sensitivity up to 0.01uW, support automatic switching of two air flow, Baseline stability is high, temperature range covers room temperature to 600 ℃, suitable for thermal analysis of various materials.

$ 3946.00

Temperature range -170 to 600 ℃, support 0.1~ 100 ℃/min heating and 0.1~ 50 ℃/min cooling, using imported high Sensitivity Sensor and dynamic PID algorithm to improve signal analysis and temperature control robustness.

$ 10175.00

The temperature range covers -170~ 600 ℃, equipped with three-way atmosphere control system and USB communication interface, supports automatic switching of atmosphere flow and fault self-test functions, and meets the needs of thermal analysis of various materials.

$ 15887.00

Temperature range -30 to 600 ℃, equipped with High Sensitivity Sensor and dual mode temperature control system, supports 12-step program temperature control and 1-10Hz sampling Frequency, with independent atmosphere control and multi-point temperature correction function.

$ 7254.00

Adopt imported High Sensitivity Sensor to improve signal accuracy, with FTC and STC dual experimental mode and 12-order program temperature control, Temperature resolution up to 0.01 ℃, support dual atmosphere automatic switching and 1~ 10Hz sampling Frequency settings.

$ 9497.00

Imported High Sensitivity Sensor and Dynamic PID Algorithm, with 0.001mW Noise level and 0.01 ℃ Temperature resolution, support FTC/STC dual mode and 12th order program temperature control, achieve accurate temperature control and efficient signal analysis.

$ 4914.00

Adopt scale differential head to adjust film thickness, Graduation 10 μ m, film range 0~ 5000 μ m, drawdown blade straightness +/- 2 μ m, die steel drawdown blade has high Hardness and Abrasion Resistance.

$ 315.00

Fully enclosed metal Furnace body to enhance Baseline Stability, with imported alloy Sensor to enhance corrosion resistance; Temperature range covering room temperature to 600 ℃, support 0.1~ 100 ℃/min program temperature control, with 0.001 ℃ resolution and Automatic calibration function.

$ 3672.00

Adopt scale differential head to adjust film Film thickness, Graduation 10μm, film range 0~ 5000μm, accuracy +/- 2μm, drawdown blade straightness +/- 2μm, die steel material to ensure wear resistance and corrosion resistance.

$ 477.00

Articles

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.
Key Points for Controlling Coating Longitudinal Uniformity with Manual Rod Coater Constant Speed Dragging Techniques
This article discusses how to control the longitudinal uniformity of the coating by dragging at a constant speed when using a manual wire rod coater. A constant-speed drag is crucial, as it directly determines the consistency of the wet film thickness.
Derivation and Validation of the Quantitative Relationship between Wire Diameter and Wet Film Thickness in Wire Wound Coating Bars
This paper investigates the relationship between the wire diameter in a wire-wound rod coater and the wet film thickness. Theoretically, under ideal conditions, the wet film thickness is approximately half of the wire diameter.
Actual Coating Thickness Deviation of Stainless Steel Wire Rod Coaters at Different Slurry Solid Contents
This article analyzes the actual coating thickness deviation of stainless steel wire rod coaters under different slurry solid contents. The study finds that the solid content of the slurry affects its viscosity and flowability, leading to deviations in the actual coating thickness from the theoretical value.
Coating film preparation techniques: comparison between wire-wound applicators and wet film preparators
This article compares two commonly used tools in laboratory coating film preparation: the wire rod coater and the wet film applicator.
Application of Wire Bar Coater in the Preparation of Coating, Ink, and Printing Samples
A wire-wound rod coater is a laboratory tool used for preparing uniform wet film coatings on flat substrates, widely applied in the production of samples in the coatings, inks, and printing industries.
The difference between a wire bar coater and a gap-type wet film applicator.
The wire-wound drawdown bar directly quantifies the coating through the gap between wires, making it suitable for thin coating preparation with high precision, particularly for low-viscosity fluids. In contrast, the gap-type wet film applicator indirectly controls film thickness through the groove depth, with the actual coating thickness significantly influenced by material properties, making it more suitable for high-viscosity coatings and thick film preparation.
The difference between a wire-wound rod coater and an extrusion coating rod
This article primarily compares the technical differences between wire-wound and extrusion coating rods. Although they are interchangeable in most scenarios, there are subtle variations in liquid loading capacity due to their distinct groove principles.
Wire rod Applicator: Principles, Applications, and Selection Guide - A Precision Coating Tool
This article provides a detailed introduction to the working principles of a Wire rod Applicator, including the mechanism by which it controls wet film thickness through the gap between stainless steel wires. It elaborates on its wide range of applications in fields such as coatings, inks, and lithium batteries, and summarizes its technical advantages, including precise control and ease of operation.