What Is Bopp Coating?
BOPP (Biaxially Oriented Polypropylene) film is one of the most widely used materials in the packaging and adhesive industries. However, the film itself does not have adhesive properties - it only becomes tape after a coating process.
This process, known as BOPP coating, plays a crucial role in determining the tape's final adhesion strength, durability, transparency, and printing quality.
What Is BOPP Coating?
BOPP coating is the industrial process of applying a layer of adhesive - usually water-based acrylic glue - onto the surface of BOPP film. The coated film is then dried, rewound, and later slit into smaller rolls of packing tape.
A standard BOPP tape coating line includes:
Unwinding system – feeds BOPP jumbo roll
Surface treatment (corona) – improves glue adhesion
Coating unit – applies adhesive layer
Drying oven – evaporates water or solvent
Cooling & rewinding – forms coated jumbo roll
Optional printing section – adds brand logo or warning text
Why Coating Quality Matters?
Key Performance Depends On
Adhesion strength Coating thickness + glue type
Tape transparency Drying stability + impurity control
Aging resistance Oven temperature curve
Slitting & rewinding smoothness Tension control system
Printing clarity EPC alignment + coating uniformity
A small defect in coating - uneven thickness, bubbles, edge overflow - can result in tape that peels, leaves residue, or loses stickiness over time.
This is why precision coating technology has become a core competitive factor in tape manufacturing.
Modern BOPP Coating Technology: From Traditional to Intelligent
Old-generation coating lines relied heavily on manual control and were slow, energy-intensive, and inconsistent.
Today, leading factories are adopting comma blade coating, heat-recycling drying systems, tension automation, and EPC edge alignment, greatly improving both efficiency and quality.
Technology Example: HY-1300 BOPP Tape Coating Machine
A modern coating line showing how the latest process control works
Key Process Features
Comma blade coater → ensures uniform glue layer and stable coating thickness
Efficient blower + 12m drying oven → shortens drying time and increases output
Heat exchanger system → reuses hot air, saves energy, accelerates production
Super EPC device → keeps film precisely aligned for clean printing
Torque motor rewinding → supports large heavy-duty BOPP jumbo rolls
Why This Matters to Manufacturers?
✔ More uniform coating = better adhesive performance
✔ Faster drying = higher output per hour
✔ Lower energy use = reduced operating cost
✔ Stable tension + EPC = fewer product defects
✔ Automation = less skilled labor required
In other words, advanced coating equipment is not only about speed - it is the foundation of tape quality consistency.
If you'd like to learn more or discuss customization options, feel free to contact us!
