BOPP heat seal film is a specialized packaging material made from biaxially oriented polypropylene (BOPP) film coated with a heat seal layer on one or both sides. This film is widely used across industries such as food, cosmetics, tea, daily chemicals, and electronics. Its combination of high transparency, excellent moisture barrier, and reliable heat seal strength makes it a preferred choice for automatic packaging lines and manual wrapping alike.

What Makes BOPP Heat Seal Film Stand Out?

Unlike standard BOPP film, heat seal film includes a functional sealing layer that allows the film to bond to itself or to other substrates under heat and pressure. This property is essential for forming secure bags, pouches, and overwraps. The film offers outstanding optical properties, with light transmittance typically above 90% and haze below 3%. This ensures that products remain clearly visible, enhancing shelf appeal and brand presentation.

The heat seal layer can be applied on one side (single-side heat seal) or both sides (double-side heat seal), depending on the packaging requirement. Single-side film is often used for laminating to paperboard or for making bags where only one side needs to seal. Double-side film is ideal for tube-style packaging and applications requiring sealing on both surfaces.

Key Technical Parameters

When selecting BOPP heat seal film, several technical parameters should be considered:

• Thickness: typically 15–40 μm, with common values of 18, 20, 25, and 30 μm.

• Width: available from 100 mm to 1200 mm, customizable.

• Heat seal strength: usually ≥ 6 N/15mm, ensuring secure seals.

• Tensile strength: ≥ 120 MPa (MD) and ≥ 200 MPa (TD) for standard grades.

• Elongation at break: ≤ 180% (MD), ≤ 120% (TD).

• Water vapor transmission rate: ≤ 5.0 g/(m²·24h) at 38°C, 90% RH.

• Oxygen transmission rate: ≤ 1500 cm³/(m²·24h·atm) at 23°C, 0% RH.

• Heat seal temperature range: 100–140°C, depending on line speed and pressure.

These values are tested according to international standards such as ISO 527-3 for tensile properties, ISO 15106 for water vapor transmission, and ASTM F88 for heat seal strength.

Applications Across Industries

BOPP heat seal film is incredibly versatile. In the food industry, it is used for packaging bread, pastries, biscuits, snacks, and confectionery. Its moisture barrier helps maintain freshness and extends shelf life. For cosmetics, it wraps foundation boxes, lipstick cartons, and skincare sets, providing a premium look and protection against dust and humidity. In the tea industry, it seals tea boxes and pouches, preserving aroma and preventing moisture ingress. Daily chemical products like shampoo and body wash bottles are often wrapped with BOPP heat seal film for tamper evidence and visual appeal. Electronic accessories and small hardware parts also benefit from its clarity and protective properties.

Customization and Supply Capability

As a source manufacturer, we offer extensive customization options. Customers can choose thickness, width, color (transparent, white, metallized, or custom Pantone), heat seal type, and printing. We support logo printing, pattern design, and anti-counterfeiting features such as holographic or laser effects. Our production lines are equipped to handle both small trial orders and large bulk shipments. Regular specifications are kept in stock for fast delivery, while custom orders are produced with flexible lead times.

Quality Assurance and Delivery

Every batch of BOPP heat seal film undergoes strict quality control. We test tensile strength, heat seal strength, optical properties, and barrier performance to ensure consistency. Our factory follows ISO 9001 quality management system, and products can be supplied with FDA or EU food contact compliance upon request. With sufficient inventory and efficient logistics, we ensure on-time delivery to customers worldwide.

For reliable BOPP heat seal film, contact us for samples, technical data sheets, and quotations.