Manufactured through an advanced co-extrusion process, the surface layer incorporates a high-efficiency low-SIT heat-sealing masterbatch, enabling fast and reliable sealing at relatively low temperatures. Thermal Bonding Film combines excellent mechanical stiffness with stable processing friction properties. It delivers glass-like transparency and bright gloss while maintaining smooth compatibility with various automatic packaging machines for fast, strong, and consistent sealing. It is an ideal material for upgrading packaging applications in food, daily chemical, and pharmaceutical industries.
|
Physical Performance Item |
Industrial Standard Parameters |
Test Method |
|
Material & Structure |
Food-grade Biaxially Oriented Polypropylene (BOPP), available in single-sided or double-sided heat-sealable structures for customization |
FDA food-contact standards / SGS certification |
|
Thickness |
18 μm–40 μm (conventional packaging thicknesses can be customized) |
ISO 4593 |
|
Heat-Seal Strength |
≥2.0 N/15mm (at 120°C, 0.3s) |
ASTM F88 |
|
Wetting Tension |
≥38 mN/m (durably maintained on the heat-sealing/printing surface after production) |
ASTM D2578 |
|
Light Transmittance |
≥80% |
ASTM D1003 |
|
Haze |
≤2.5% |
ASTM D1003 |
|
Tensile Strength (MD/TD) |
≥120 MPa / ≥200 MPa |
ASTM D882 |
During high-speed filling on automatic packaging machines such as pillow packaging machines, the sealing dwell time is extremely short. If a conventional film has a high initial sealing temperature or a narrow heat-sealing window, the heat-sealing layer may not fully melt and bond within the limited heating time. This can result in weak or incomplete seals. During subsequent compression, handling, and transportation, the package may develop bursting edges and air leakage, potentially causing product oxidation, deterioration, and costly downstream claims.
The surface layer of Thermal Bonding Film is co-extruded with a specially formulated, high-efficiency heat-sealing masterbatch. Its low initial sealing temperature and wide heat-sealing window allow the heat-sealing layer to fuse rapidly during the short, high-frequency pressing cycle of automatic packaging equipment.
With a heat-seal strength of ≥2.0 N/15mm, the finished seals remain strong, flat, and reliable. This helps significantly reduce the risk of edge bursting and air leakage on high-speed automatic packaging lines, supporting more stable continuous production.
Medium- and high-speed automatic packaging equipment places stringent demands on film smoothness and flatness. If conventional film has excessive thickness variation or its coefficient of friction (COF) fluctuates as the film heats up through machine friction, it may cause film curling, tracking deviation, stringing, and even sticking to the sealing knife during cutting and sealing. These problems can lead to frequent line stoppages and reduced production efficiency.
HUA HENG relies on an advanced intelligent online thickness measurement system to strictly control the thickness deviation of Thermal Bonding Film within ±0.5 μm.
At the same time, the surface resin formulation is precisely controlled to maintain stable COF, slip, and opening properties during high-speed film feeding and friction-induced heating. This enables smooth film feeding with reduced tracking deviation and sealing-knife sticking, helping maintain reliable continuous automated production and significantly lower overall packaging costs.
Suitable for biscuits, candies, puffed foods, nuts, and other snack products. Thermal Bonding Film combines high transparency and a premium visual appearance with reliable moisture protection, helping maintain the crisp texture and freshness of packaged foods.
Suitable for facial masks, hair and body care products, tissue outer packaging, and other daily chemical applications. Its bright gloss and strong sealing performance enhance the visual appeal and overall packaging quality of finished products.
Suitable for pharmaceutical tablets, dietary supplements, and outer packaging for medical devices. It provides reliable moisture and water resistance together with secure sealing performance, supporting the protection and integrity of packaged products.
Designed for various medium- and high-speed automatic packaging machines, Thermal Bonding Film supports smooth, continuous production and reliable sealing performance. Its stable processing properties help reduce packaging interruptions, improve production efficiency, and lower overall packaging costs.
HUA HENG has comprehensively obtained and strictly implements ISO 9001:2015 Quality Management System, ISO 14001:2015 Environmental Management System, ISO 45001:2018 Occupational Health and Safety Management System, and ISO 50001:2018 Energy Management System certifications. These four management systems work together to establish comprehensive quality control from raw material receiving to finished-film dispatch. Standard Operating Procedures (SOPs) are implemented throughout every key production stage, helping minimize quality fluctuations caused by human factors.
HUA HENG's BOPP heat-sealable and thermal bonding films are manufactured using 100% high-purity polypropylene resin. The products are designed to meet applicable U.S. FDA requirements for food-contact materials and undergo regular comprehensive testing by internationally recognized SGS, including tests for heavy metals, REACH compliance, and restricted substances. This provides the compliance documentation and quality assurance needed for packaging supply chains serving high-standard markets in Europe, North America, Japan, and other regions, covering food, daily chemical, and medical device packaging applications.
Supported by its municipal-level enterprise technology center and strong R&D capabilities, HUA HENG participated in the R&D and industrialization of the Key Technology Research and Industrialization of VOC-Free Films for Paper-Plastic Lamination project, which received a Packaging Industry Science and Technology Award.
During production, strict controls are applied to surface deposits, fisheyes, and solvent residues to maintain high material cleanliness. This supports cleaner and safer packaging production and aligns with the environmental packaging initiatives increasingly adopted by multinational brands.
Through the integrated application of Kingdee Cloud Galaxy ERP and a digital energy and carbon management platform, HUA HENG assigns a unique digital traceability code to every roll of BOPP export film. Inspection data is digitally connected with the factory's intelligent online thickness measurement system and automated pilot-scale quality inspection equipment, with film thickness deviation strictly controlled within ±0.5 μm.
After receiving the shipment, overseas buyers can use the traceability code to review key production information associated with the corresponding batch, including process control parameters, stretching speed, and initial corona treatment performance. This creates a transparent digital quality record for every exported film roll and provides buyers with greater confidence in batch consistency and quality control.
Yes. HUA HENG can customize the film according to your packaging machine model, production speed, and filling material characteristics. Film thickness, heat-sealing temperature, and coefficient of friction (COF) can be flexibly adjusted to provide a dedicated Thermal Bonding Film solution for your packaging process.
No significant batch-to-batch variation is expected. HUA HENG implements strict quality control throughout the entire production process, from raw material receiving to finished-film dispatch. This helps maintain high consistency in heat-seal strength, optical properties, and surface wetting tension across different production batches while minimizing quality fluctuations.
No. HUA HENG uses an advanced intelligent online thickness measurement system to control full-width film thickness deviation within ±0.5 μm. The film also undergoes high-precision biaxial orientation at the molecular level, providing excellent stiffness and highly stable COF, slip, and opening properties.
The non-heat-sealing printing surface is designed to withstand high temperatures while maintaining high dimensional stability. Even under continuous heating and high-frequency cutting, the film is less prone to tracking deviation or sticking to the sealing knife, helping ensure smooth and reliable operation on fully automated packaging lines.
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