How BOPP Tape is Manufactured - Complete Guide 2025
A comprehensive guide to BOPP adhesive tape manufacturing process, machinery requirements, and production best practices.
What is BOPP Tape?
BOPP (Biaxially Oriented Polypropylene) tape is a pressure-sensitive adhesive tape widely used for packaging, sealing, and bundling applications. The manufacturing process involves coating acrylic or hot-melt adhesive onto BOPP film, followed by slitting into required widths.
Complete Manufacturing Process
1. Film Unwinding
The process begins with unwinding the BOPP film (typically 28-40 micron thickness) from jumbo rolls. Modern unwinding systems feature automatic tension control and edge position control (EPC) to ensure uniform coating.
- Unwind diameter: Up to 1000mm
- Tension control: Pneumatic or magnetic brake system
- Web alignment: Automatic EPC system
2. Surface Treatment (Corona Treatment)
Before coating, the BOPP film undergoes corona treatment to improve adhesive bonding. This process increases the surface energy of the film from 28-32 dynes to 38-42 dynes, ensuring superior adhesive adhesion.
3. Adhesive Coating
The coating process is the heart of BOPP tape manufacturing. Three main coating methods are used:
Hot Melt Coating
Most common method for packaging tapes. Adhesive is heated to 140-180°C and applied using precision coating rollers.
Coating Weight: 18-30 GSM
Solvent-Based Coating
Used for high-performance tapes. Acrylic adhesive dissolved in solvent is coated and then dried in a tunnel dryer.
Drying Temperature: 80-120°C
Water-Based Coating
Eco-friendly option with water-based acrylic adhesive. Requires longer drying time but produces minimal emissions.
Drying Length: 15-25 meters
4. Drying System
After coating, the adhesive must be dried to remove solvents or activate the hot-melt. Modern coating machines use hot air circulation tunnels with precise temperature control across multiple zones. Typical drying temperatures range from 80-150°C depending on the adhesive type.
5. Log Rewinding
The coated film is rewound into jumbo rolls (logs) of 500-1500 meters length. This process requires precise tension control to prevent adhesive blocking. Most modern machines use turret-type rewinding for continuous production.
6. Slitting & Rewinding
The jumbo rolls are converted into finished tapes using slitter rewinder machines. The process involves:
- Slitting: Cutting the wide roll into desired widths (12mm, 24mm, 48mm etc.) using circular knives
- Rewinding: Winding individual rolls on paper cores (25mm, 76mm diameter)
- Length counting: Automatic meter counting for consistent roll length
7. Core Cutting
Paper cores (tubes) are cut to the exact width of each tape roll using automatic core cutting machines. Standard core sizes are 25mm, 38mm, and 76mm ID (inner diameter).
8. Auto Slicing
Large tape logs are cut into smaller rolls (typically 100m or 65m) using automatic slicing machines. This process must maintain clean cutting edges without adhesive oozing.
Machinery Required for BOPP Tape Manufacturing
Essential Equipment List:
- 1. BOPP Tape Coating Machine - Main production unit (₹14-25 Lakh depending on width and features)
- 2. Slitter Rewinder Machine - For converting logs to finished rolls (₹4-6 Lakh)
- 3. Auto Slicing Machine - For cutting logs into smaller rolls (₹70,000-1.5 Lakh)
- 4. Paper Core Cutting Machine - For preparing cores (₹1-2 Lakh)
- 5. Air Compressor - For pneumatic controls (₹50,000-1 Lakh)
Quality Control Parameters
Maintaining consistent quality requires monitoring these critical parameters:
- Coating weight: 18-30 GSM (± 2 GSM tolerance)
- Peel adhesion: 400-600 grams/inch width
- Holding power: Minimum 24 hours at 40°C
- Tensile strength: 25-35 N/mm²
- Elongation at break: 100-150%
Production Capacity & Economics
A standard 1000mm width coating machine can produce:
- • Daily Production: 5,000-8,000 kg of coated film
- • Monthly Capacity: 150,000-200,000 kg
- • Production Speed: 20-100 meters/minute
- • Workforce: 8-12 operators per shift
Conclusion
BOPP tape manufacturing is a precise process requiring specialized machinery and strict quality control. Success in this business depends on selecting the right equipment, maintaining consistent quality, and optimizing production efficiency. With proper machinery from reliable manufacturers like Hero Impex, you can achieve production excellence and business profitability.