Best BOPA Film China Supplier

Q: What are BOPA films?

A: BOPA (Biaxially Oriented Polyamide) films, also known as BON (Biaxially Oriented Nylon) films, are made from nylon and processed through biaxial orientation. This process stretches the film in machine and transverse directions, aligning the polymer chains parallel to the film plane and enhancing clarity, flexibility, and tensile properties.

BOPA films offer excellent barrier properties against oxygen and gases, making them ideal for food packaging and other applications where product preservation is crucial.

Q: What are the main advantages of BOPA films?

A: BOPA films are known for their high mechanical strength, excellent flexibility and tensile strength, high puncture resistance, notable thermoformability, superior clarity, transparency, and glossy finish.

They are particularly valued in the packaging industry for their ability to maintain the quality of oxygen-sensitive products​.

Q: What are the types of BOPA films?

A: the main types of BOPA films:

      1. Sequential BOPA:

• This type involves stretching the film in two perpendicular directions at separate stages.
• It’s a traditional method offering good control over the film’s properties in each direction.
• Sequential BOPA films may be suitable for applications requiring specific strength or clarity in one direction over another.

       2. Simultaneous BOPA:

• This method involves stretching the film in both directions simultaneously.
• It’s a faster and more efficient production process compared to sequential BOPA.
• Simultaneous BOPA films offer good overall properties but may not have the same level of fine-tuned control as sequential films.

      3. Blown BOPA:

• This type involves stretching the film in one direction (longitudinally) as it exits a die during production.
• It’s a less common method compared to the other two.
• Blown BOPA films may have lower overall strength and may be used for specific applications with desired characteristics.

Q: How are BOPA films manufactured?

A: BOPA films are produced through either the Double Bubble Process or Tenter Frame Process. The Double Bubble Process is known for producing films with a balanced structure due to simultaneous stretching in all directions. At the same time, the Tenter Frame Process may not always yield a similar orientation but provides films with consistent thickness. The manufacturing process involves extrusion, reheating, stretching, and annealing steps, each critical for achieving the desired film properties.

Q: What are the applications of BOPA films?

A: BOPA films are extensively used in the food packaging industry for products that require high oxygen barriers, such as meats, sausages, dairy products, microwaveable meals, and frozen foods.

Due to their strength, puncture resistance, and barrier properties are also suitable for packaging medical, pharmaceutical goods, cosmetics, and various industrial products​.