Knife Coating Systems
category
Knife coating systems meter a controlled thickness of coating compound onto a textile or film substrate by passing the substrate beneath a fixed or floating knife blade that levels the applied compound to a defined coat weight, with knife geometry, gap setting, and compound rheology governing the coating weight and uniformity achieved across the substrate width for adhesive, polymer, and functional compound application.
Role
Provides the most widely used and mechanically simplest coating application method for medium to heavy coating weights on technical textiles, with knife coating offering maximum versatility across compound viscosity ranges from 1000 to 500000 centipoise and substrate types from open-weave fabric to dense nonwoven, making it the preferred first-choice coating method for waterproof, blackout, and barrier coatings on industrial, outdoor, and technical textile substrates.
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Subtopics
- Knife-Over-Roll Configuration Design Knife-over-roll systems position a fixed knife blade above a driven backing roll that supports the s…
- Floating Knife and Air Knife Systems Floating knife systems rest the knife blade directly on the substrate surface without a rigid backin…
- Knife Geometry and Blade Material Selection Knife blade geometry including tip profile from sharp to rounded, bevel angle from 15 to 60 degrees,…
- Paste and Compound Viscosity Management Coating compound viscosity management maintains the target viscosity of PVC plastisol, polyurethane,…
- Tandem Coating Lines for Multi-Layer Application Tandem coating lines use two or more sequential knife coating stations with drying ovens between eac…
- Foam Coating Systems and Compound Preparation Foam coating systems mechanically whip air into latex or polyurethane coating compounds using frothi…
- Solvent-Based and Water-Based Knife Coating Solvent-based coating systems use organic solvent solutions of polyurethane, neoprene, or nitrocellu…
- Coating Weight Measurement and Control Systems Inline coating weight measurement uses beta radiation transmission, X-ray fluorescence, or infrared …
- Substrate Tension and Web Handling in Knife Coating Knife coating web handling maintains substrate tension at 50 to 500 Newtons per metre across the mac…
- PVC Plastisol Knife Coating for Technical Fabrics PVC plastisol knife coating applies 100 percent solid PVC resin dispersed in plasticiser at coating …