BOPP Film For Cigarette Packaging
BOPP Film for Cigarette Packaging is a biaxially oriented polypropylene film specifically designed for cigarette box overwrapping and tobacco packaging applications. It is typically supplied as a transparent, heat-sealable or shrinkable film for use on high-speed cigarette overwrapping machines.
The film is produced by extruding polypropylene and stretching it in both the machine direction (MD) and transverse direction (TD). Biaxial orientation provides the film with a combination of stiffness, tensile strength, optical clarity, surface gloss and controlled shrinkage. For cigarette overwrap applications, the film can also be engineered with heat-sealing layers, controlled coefficient of friction (COF), antistatic properties and specific shrinkage characteristics.
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Product Introduction
BOPP stands for Biaxially Oriented Polypropylene. Unlike ordinary polypropylene film, BOPP film is mechanically oriented in two directions during production.
The basic manufacturing process consists of:
PP resin → extrusion → film casting → machine-direction stretching → transverse-direction stretching → surface treatment → heat-sealable/coating treatment → slitting → roll winding
The biaxial orientation process changes the molecular structure of polypropylene and improves the film's dimensional stability, tensile properties, stiffness and optical performance.
For cigarette packaging, the film is normally used as an outer overwrap around the cigarette carton or pack, rather than as the only packaging material. Depending on the required structure, the film can be transparent, matte, heat-sealable, shrinkable or metallized.
BOPP is particularly suitable for cigarette overwrapping because the packaging process requires controlled film feeding, heat sealing, folding and tight fitting at relatively high production speeds.
Typical Technical Specifications
| Parameter | Available Options |
|---|---|
| Material | Polypropylene (PP) |
| Film Type | BOPP |
| Application | Cigarette & Tobacco Packaging |
| Appearance | Transparent / Glossy / Matte |
| Thickness | Customized |
| Width | Customized |
| Roll Length | Customized |
| Core Size | Customized |
| Surface Treatment | Corona Treated / Untreated |
| Printing | Printable Grades Available |
| Lamination | Laminating Grades Available |
| Sealing | Heat-Sealable Grades Available |
| Packaging Form | Roll |
Heat-Sealing Performance
During the packaging process, the film passes through a sealing system where controlled heat and pressure activate the sealable layer. The final seal must withstand:
Folding
Pack handling
Transportation
Temperature changes
Mechanical tension
Storage
A cigarette BOPP film can be designed with different sealing characteristics, including standard heat-sealable and low-sealing-initiation-temperature (low-SIT) structures.
Low-SIT grades can be useful for high-speed packaging because the film can achieve sealing at lower temperatures, depending on the specific formulation and machine conditions. Commercial metallized and heat-sealable BOPP products also specify hot-tack and seal-strength performance for high-speed packaging.
FAQ:
1. What is BOPP cigarette packaging film?
BOPP cigarette packaging film is a biaxially oriented polypropylene film designed primarily for cigarette pack and carton overwrapping. It can be engineered with heat-sealing, shrinkage, slip and surface-treatment properties.
2. What thickness is commonly used for cigarette BOPP film?
Common commercial specifications are approximately 18–25 μm, with 20–22 μm being frequently specified for cigarette overwrap applications.
3. Is BOPP film heat sealable?
Standard BOPP is not necessarily an effective standalone heat-sealing film. Cigarette packaging grades can incorporate a dedicated heat-sealable layer or modified surface to provide the required sealing performance.
4. What is the difference between transparent and metallized BOPP?
Transparent BOPP provides visibility of the printed package, while metallized BOPP incorporates an aluminum layer to provide a metallic appearance and enhanced barrier properties.
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