[Dongguan,China] – BOPP (Biaxial Oriented Polypropylene) packaging tape is widely used in daily life and industrial production, offering durability and strong adhesion. Its manufacturing process integrates advanced technologies and meticulous craftsmanship. Below is an in-depth look at how this essential product is made.
1. Raw Material Preparation
Substrate Selection:
The core material of BOPP packaging tape is BOPP film, known for its high transparency, tensile strength, and flexibility. Manufacturers select films with thicknesses ranging from 20 to 50 microns, depending on the tape’s intended use. For instance, standard packaging tapes typically use 25-30 micron films, balancing cost and performance.
Adhesive Formulation:
The adhesive, crucial for the tape’s stickiness, is usually an acrylate-based compound. The production process involves mixing acrylic monomers, initiators, and solvents in precise ratios inside a reactor. By carefully controlling temperature, reaction time, and stirring speed, manufacturers create a high-performance adhesive with optimal tackiness, weather resistance, and stability. Additional agents like plasticizers (for flexibility) and antioxidants (to prevent aging) are incorporated to ensure long-term reliability.
2. Coating Process
Equipment Calibration:
Before coating begins, the machinery—comprising an unwinding system, coating head, drying oven, and rewinder—must be finely tuned. Tension control prevents film wrinkling, while the coating gap and speed are adjusted to guarantee uniform adhesive application.
Coating Operation:
The BOPP film is fed through the coating head, where methods like gravure coating or comma knife coating apply the adhesive evenly. In gravure coating, an engraved roller transfers the adhesive from microscopic cavities onto the film. The coated film then enters a drying tunnel, where hot air or infrared heating (80–120°C, 1–3 minutes) evaporates solvents and solidifies the adhesive.
3. Slitting & Packaging
Precision Slitting:
The master roll, typically 1,000–2,000 mm wide, is slit into narrower rolls using high-accuracy cutting machines. Tension control ensures tight, even winding, with a width tolerance of ±0.5 mm.
Quality Packaging:
Each roll undergoes visual inspection for defects (e.g., bubbles, scratches, or poor adhesion). Approved tapes are packaged in plastic film (for moisture resistance) or cartons (for retail display), labeled with specifications, branding, and usage instructions.
Conclusion
From material selection to coating precision and rigorous quality checks, every step in BOPP tape production reflects a commitment to excellence. This meticulous process ensures that the final product meets diverse industrial and consumer needs—strong, reliable, and ready to seal the world’s packages.
Your message must be between 20-3,000 characters!
