The Metallizable BOPP Base Film is a specialty biaxially oriented polypropylene film engineered as a substrate for vacuum metallization. HUA HENG has spent years refining this film grade to meet the demanding requirements of high-barrier flexible packaging, decorative labels, and heat-sealable laminates. The material delivers excellent metal adhesion, low haze, and consistent surface energy, which are essential for producing bright, uniform metallized layers without pinholes or delamination.
Unlike standard BOPP films, a metallizable BOPP base film must combine an ultra-clean surface chemistry, controlled roughness, and stable corona treatment. HUA HENG manufactures this product using advanced sequential stretching technology and proprietary formulation additives. The result is a film that works reliably with aluminum, aluminum oxide, and other metal coatings across a wide range of vacuum metallizers. Converters can expect fewer web breaks, reduced scrap, and improved productivity during downstream printing, lamination, and slitting.
HUA HENG applies a high-energy corona discharge to the metallization side of the film. This treatment creates polar groups on the polypropylene surface, which increase surface free energy and improve metal adhesion. The corona treatment level is measured inline and verified offline using dyne pens or contact angle goniometers. Treated film is immediately wound into rolls with an interleaving material to protect the surface from dust and abrasion.
The film also benefits from a proprietary additive package that reduces the migration of low-molecular-weight components to the surface. In many standard BOPP films, these mobile species can outgas during vacuum metallization and create a cloudy or uneven metal coating. The HUA HENG formulation keeps the surface clean under high vacuum, allowing the aluminum to nucleate evenly and form a dense, reflective layer.
For converters running double-side metallization or lamination with high-barrier adhesives, HUA HENG offers double corona treatment. This option provides high surface energy on both sides, improving wetting of inks, coatings, and adhesives. The recommended treatment level for double-side treated film is 38–42 mN/m on each side, with uniform distribution across the full width.
The metallizable BOPP base film is produced through a sequential biaxial stretching process. Polypropylene resin is extruded into a cast sheet, quenched, and then stretched in the machine direction and transverse direction. HUA HENG uses multi-layer coextrusion technology to create a film structure with a clean skin layer on the metallization side. This skin layer is formulated for low surface roughness and high adhesion, while the core layer provides mechanical strength and dimensional stability.
During production, automated vision systems inspect the film for gels, fish eyes, and other optical defects. Thickness gauges measure the film profile in real time, and feedback loops adjust the extrusion die to maintain tight tolerances. Rolls are tested for residual solvents, surface tension, and coefficient of friction before they are released to the warehouse.
HUA HENG maintains a clean-room environment for slitting and rewinding operations. Each slit roll is wrapped in protective polyethylene film and packed in a sturdy corrugated carton with end supports. This packaging prevents edge damage and contamination during transit and storage. The company also provides a certificate of analysis with each shipment, including batch numbers, test results, and production dates for traceability.
The HUA HENG metallizable BOPP base film supports a wide range of converting and packaging applications. Its combination of high metal adhesion, optical clarity, and barrier performance makes it a preferred substrate in several markets.
Metallized BOPP films are widely used in snack food packaging, biscuit wrappers, confectionery bags, and dried food pouches. The metallized layer provides an attractive metallic finish while extending shelf life by blocking oxygen and moisture. HUA HENG base film helps converters achieve high metal bond strength, which is critical when the metallized film is laminated to polyethylene or cast polypropylene for sealable structures.
In label converting, metallized BOPP base film is used for pressure-sensitive labels, in-mold labels, and wrap-around labels. The film offers excellent printability after metallization, with a bright reflective background that enhances brand graphics. HUA HENG film is designed to run smoothly on high-speed label presses without curling or static buildup.
Metallized BOPP is a common component in lidding films for yogurt cups, dessert containers, and pharmaceutical blister packs. The film provides a strong barrier in a thin, lightweight structure. HUA HENG base film can be converted into lidding with heat-seal coatings applied either before or after metallization, depending on the customer’s process.
Beyond packaging, metallized BOPP base film finds use in thermal insulation, reflective wraps, and cable shielding. The low density and high reflectivity of the metallized film make it an effective radiant barrier. HUA HENG offers thicker gauges for these applications, providing increased puncture resistance and handling strength.
Proper storage of metallizable BOPP base film before metallization is essential to maintain surface quality. HUA HENG recommends storing rolls in a clean, dry environment at 15–30°C and 40–60% relative humidity. Rolls should remain wrapped in their original packaging until just before use. Avoid direct sunlight, high temperatures, and exposure to solvents or strong odors, as these can affect surface tension and metal adhesion.
Before metallization, converters should condition the rolls in the metallizer room for at least 24 hours. This allows the film to reach thermal equilibrium and reduces the risk of condensation on the film surface. If the film has been stored for more than six months, the surface tension should be rechecked with a dyne test. HUA HENG technical support can assist with troubleshooting and provide guidance on optimizing metallizer parameters for specific film grades.
HUA HENG has built a reputation for delivering consistent, high-performance BOPP films to converters around the world. The company invests in continuous research and development to improve film formulations, surface treatments, and production efficiency. Every batch of metallizable BOPP base film is produced under ISO 9001 and ISO 14001 certified management systems, ensuring both quality and environmental responsibility.
The brand’s technical team works closely with customers to match the right film grade to each application. Whether a converter needs ultra-low haze for transparent barrier coatings or enhanced metal adhesion for retort pouches, HUA HENG offers tailored solutions. This customer-first approach has made the company a trusted partner in the flexible packaging and label industries.
HUA HENG also prioritizes supply chain reliability. The company maintains strategic raw material inventories and multiple production lines to reduce lead times. For large-volume converters, HUA HENG can support vendor-managed inventory programs and just-in-time deliveries. This level of service helps customers keep their metallization lines running without interruption.
