KJ GROUP 4-Side Precision Micrometer Film Applicator
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic |
| Model | 4-Side Precision Micrometer |
| Pricing | Available Upon Request |
| Material | High-Grade Stainless Steel (Superior to Standard 304) |
| Coating Width Options | 80 mm (Total Width 100 mm) or 160 mm (Total Width 190 mm) |
| Thickness Range per Edge | 5–1000 µm |
| Thickness Tolerance | ±1 to ±10 µm (varies by nominal thickness) |
| Compliance | ASTM D823, ISO 2808, GB/T 1727 |
Overview
The KJ GROUP 4-Side Precision Micrometer Film Applicator is a manually operated, multi-edge wet-film thickness control tool engineered for reproducible, high-accuracy coating deposition on flat, rigid substrates. Based on the principle of precision-ground blade clearance—where the gap between the applicator edge and substrate defines the wet film thickness—this instrument enables rapid, solvent-free, non-contact thickness selection across four calibrated edges in a single pass. It operates under established gravure-style drawdown methodology, where controlled shear and meniscus formation govern final wet film uniformity. Designed for QC laboratories, R&D facilities, and production line validation, it supports method development and routine verification of coating viscosity, rheology, and substrate wettability prior to full-scale application.
Key Features
- Four independently calibrated edges per applicator, each with traceable micrometer-level thickness specification (ranging from 5 µm to 1000 µm), enabling immediate comparative testing without tool changeover.
- Constructed from high-grade stainless steel alloy—exhibiting superior hardness, wear resistance, and corrosion resistance compared to standard AISI 304—ensuring long-term dimensional stability and surface integrity after repeated solvent exposure and mechanical cleaning.
- Two standardized physical configurations: compact format (100 mm total width / 80 mm effective coating width) and extended format (190 mm total width / 160 mm effective coating width), both optimized for compatibility with KJ GROUP’s AFA-I, AFA-III, and AFA-IIID automatic film applicators.
- Tolerance bands rigorously aligned with international standards: ±1 µm for nominal thicknesses ≤20 µm; ±3–±5 µm for mid-range (50–200 µm); up to ±10 µm for ultra-thick applications (≥750 µm), consistent with ASTM D823 Annex A1 and ISO 2808 Clause 6.2.
- Beveled edge geometry minimizes drag-induced streaking and promotes uniform meniscus breakup, resulting in low-coefficient-of-variation (<3.5%) wet films across glass, metal, polymer, and ceramic substrates.
Sample Compatibility & Compliance
The applicator is validated for use with low-to-medium viscosity liquids including solvent-based and waterborne paints, UV-curable resins, conductive inks, adhesives, protective coatings, and functional thin-film precursors (e.g., PEDOT:PSS, perovskite inks). Substrate requirements include surface flatness ≤10 µm deviation over 100 mm and contact angle <90° for reliable meniscus formation. All models conform to ASTM D823 (Practice for Producing Films of Uniform Thickness), ISO 2808 (Paints and Varnishes — Determination of Film Thickness), and Chinese national standard GB/T 1727 (General Requirements for Paint Testing Methods). Calibration documentation includes traceable reference to NIM (National Institute of Metrology, China) certified gauges.
Software & Data Management
As a mechanical, non-electronic instrument, the 4-Side Precision Micrometer Film Applicator requires no embedded firmware or proprietary software. However, it integrates seamlessly into GLP/GMP-compliant workflows: each unit is serialized and supplied with a Certificate of Conformance listing edge-specific nominal thicknesses and associated tolerances. Users may log application parameters—including substrate type, ambient temperature/humidity, drawdown speed (when used with motorized stages), and measured dry-film thickness via profilometry or ellipsometry—into LIMS or ELN systems. For audit readiness, KJ GROUP provides optional calibration verification kits (traceable step gauges, optical interferometry templates) supporting 21 CFR Part 11-aligned record retention when paired with electronic lab notebooks.
Applications
- Pre-screening of coating formulations for thickness-dependent properties: gloss, haze, adhesion (cross-hatch), pencil hardness, and corrosion resistance (salt spray).
- Calibration transfer between laboratory-scale drawdown and pilot-line roll-coating or slot-die processes.
- Inter-laboratory round-robin studies requiring identical wet-film generation protocols across multiple sites.
- Development of thickness-gradient libraries for optical interference modeling or refractive index profiling.
- Validation of automated applicator performance—used as a primary reference standard to verify repeatability and edge accuracy of AFA-series instruments.
FAQ
What standards does this applicator comply with?
ASTM D823, ISO 2808, and GB/T 1727 for wet-film thickness application methodology and tolerance reporting.
Can it be used with highly viscous pastes or nanoparticle suspensions?
It is optimized for Newtonian and mildly shear-thinning fluids with viscosity ≤50 Pa·s; thixotropic or particle-loaded systems require pre-shear conditioning and slower drawdown speeds to maintain edge definition.
How often should calibration verification be performed?
Recommended quarterly for routine QC use; before each critical test series in regulated environments; and after any mechanical impact or abrasive cleaning.
Is the 100 mm and 190 mm version interchangeable in the AFA-III machine?
Yes—the AFA-III and AFA-IIID feature adjustable clamping fixtures accommodating both widths; the AFA-I supports only the 100 mm variant.
Does KJ GROUP provide NIST-traceable calibration certificates?
Standard delivery includes manufacturer’s Certificate of Conformance; NIM-traceable calibration certificates are available upon request with lead time.
