BOPP Cigarette Shrink Pack Film
BOPP Cigarette Shrink Pack Film is a biaxially oriented polypropylene film developed for shrink wrapping cigarette packs and cartons. The film is engineered to provide controlled thermal shrinkage, stable film feeding, heat-sealing performance and a tight finished package after exposure to controlled heat.
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Product Introduction
Product Definition
BOPP stands for Biaxially Oriented Polypropylene. The film is stretched in both the machine direction (MD) and transverse direction (TD), creating an oriented polypropylene structure with controlled mechanical and thermal properties.
A cigarette shrink-pack film generally consists of a BOPP base structure combined with a surface or sealing layer designed for the specific packaging process.
Film unwinding → film feeding → pack wrapping → folding → heat sealing → thermal shrinkage → cooling → finished pack
The objective is to produce a film-wrapped cigarette pack with controlled folding, stable seals and a relatively tight external appearance.
Key Features of BOPP Cigarette Shrink Pack Film
Controlled Thermal Shrinkage
The film is engineered to shrink when exposed to a specified temperature range. Controlled shrinkage helps compensate for film slack after wrapping and allows the film to conform more closely to the cigarette pack.
The required shrinkage depends on:
- Packaging machine
- Pack dimensions
- Heating temperature
- Heating time
- Film thickness
- Film orientation
- Sealing method
Both MD and TD shrinkage should be considered when selecting the film.
Heat-Sealable Structure
For shrink-pack applications, the film may incorporate a heat-sealable layer that allows the package to be sealed during the wrapping process.
Important parameters include:
- Seal initiation temperature
- Heat-seal strength
- Hot tack
- Sealing window
- Sealing pressure
- Dwell time
A film with a suitable sealing window can help maintain consistent seals when machine speed or operating temperature changes within the permitted range.
Controlled COF
The coefficient of friction (COF) influences film movement through the packaging machine.
The film must move smoothly across:
- Guide rollers
- Folding units
- Sealing components
- Conveyors
- Film-contact surfaces
An excessively high COF may increase feeding resistance, while an excessively low COF may reduce film control during folding. For this reason, cigarette shrink-pack film should be specified according to the actual packaging equipment rather than selected solely by thickness.
High Optical Clarity
Transparent BOPP shrink film allows the printed cigarette package underneath to remain visible.
Important optical properties include:
Haze
Gloss
Transparency
Surface uniformity
For transparent applications, low haze and consistent gloss can help maintain a clear appearance after shrinking.
Typical Technical Specifications
The following values are typical reference ranges, not universal specifications. The final specification should be confirmed according to the actual film grade and packaging machine.
| Parameter | Typical Specification |
|---|---|
| Material | Biaxially Oriented Polypropylene |
| Film Type | Cigarette Shrink Pack Film |
| Thickness | 18–25 μm |
| Common Thickness | 20–23 μm |
| Film Width | Customized |
| Roll Length | Customized |
| Core Diameter | Commonly 3" or 6" |
| Shrinkage | Grade-dependent |
| Heat Sealing | Available |
| Surface | Glossy / Matte / Customized |
| Haze | Grade-dependent |
| Gloss | Grade-dependent |
| COF | Controlled according to application |
| Corona Treatment | Available |
| Tensile Strength | MD/TD specified by grade |
| Elongation | MD/TD specified by grade |
| Packaging | Roll / palletized packaging |
Important: Shrinkage should be specified with the test temperature, test time and MD/TD direction, because a shrinkage percentage without test conditions is not sufficient for technical comparison.
BOPP Cigarette Shrink Film Thickness
Film thickness is one of the most important parameters in procurement. Common thickness options include:
A thinner film may reduce material consumption, but reducing thickness can also change:
- Film stiffness
- Tensile strength
- Tear resistance
- Heat transfer
- Sealing behavior
- Shrinkage response
- Machine handling
Therefore, buyers should not select the film only according to price per kilogram.
Cost per finished pack = film consumption per pack × film unit price + packaging losses
Machine trials should also be considered because a lower-priced film can create additional waste if its feeding, sealing or shrinking characteristics are incompatible with the equipment.
Heat-Sealing Performance
During cigarette packaging, the film must form a stable seal before or during the shrinking stage. The main technical parameters are:
Film Feeding and Machine Compatibility
A cigarette shrink-pack film must run consistently through the packaging line. Before purchasing, the following parameters should be confirmed:
- Packaging machine model
- Maximum machine speed
- Film width
- Film thickness
- Roll diameter
- Core diameter
- Film winding direction
- Seal configuration
- Heating system
- Shrink tunnel or heating section
- Required shrinkage
- Film COF
For an existing production line, the safest approach is to compare the proposed BOPP film against the current film using an actual machine trial.
Corona Treatment
Polypropylene has relatively low surface energy, which can limit adhesion of printing inks and coatings. Corona treatment modifies the film surface to increase its surface energy.
For cigarette packaging applications, corona treatment may be required when the film is intended for:
- Printing
- Coating
- Lamination
- Metallization
The purchaser should specify: Treatment side + target surface tension + testing method (instead of simply requesting "corona treated film").
Surface treatment can also decrease over time, so storage conditions and the interval between film production and printing should be considered.
Transparent and Metallized Options
Transparent BOPP Cigarette Shrink Film
Transparent film is used when the printed cigarette pack needs to remain visible.
Typical requirements include:
- Low haze
- High transparency
- Controlled gloss
- Stable shrinkage
- Heat sealing
- Controlled COF
Metallized BOPP Cigarette Shrink Film
Metallized BOPP incorporates a thin aluminum layer onto the film surface. Depending on the construction, metallized film can provide:
- Metallic appearance
- Light barrier
- Improved moisture barrier
- Improved gas barrier
- Reflective surface
For metallized structures, buyers should request quantitative barrier data such as OTR and WVTR rather than relying on general descriptions such as "high barrier."
BOPP Cigarette Shrink Pack Film Manufacturing Process
A typical manufacturing process includes the following stages:
Applications
BOPP Cigarette Shrink Pack Film is primarily designed for:
- Cigarette pack shrink wrapping
- Cigarette carton overwrapping
- Cigarette package outer wrapping
- Tobacco product packaging
- Heat-shrinkable cigarette packaging
- High-speed cigarette packaging lines
Depending on the film construction, similar shrink BOPP structures may also be considered for other small-format consumer-product overwrap applications.
BOPP Shrink Film vs Standard BOPP Film
| Feature | BOPP Cigarette Shrink Pack Film | Standard BOPP Packaging Film |
|---|---|---|
| Main application | Cigarette shrink packaging | General packaging |
| Shrinkage | Controlled for shrink wrapping | Depends on grade |
| Heat sealing | Application-specific | May or may not be sealable |
| COF | Controlled for packaging equipment | General application |
| Pack tightness | Important | Not always required |
| Machine compatibility | Critical | Application dependent |
| Film thickness | Usually thin-gauge | Broad range |
| Optical requirements | Often high clarity | Depends on product |
| Shrink conditions | Specifically controlled | Not necessarily optimized |
| Packaging speed | Often high-speed | Depends on application |
Quality Control Requirements
For B2B purchasing, a Technical Data Sheet (TDS) should be requested before bulk ordering. Recommended quality-control items include:
- Thickness
- Thickness tolerance
- Width
- Roll length
- Core diameter
- Roll diameter
- Tensile strength MD/TD
- Elongation MD/TD
- Tear resistance
- Shrinkage MD/TD
- Seal initiation temperature
- Heat-seal strength
- Hot tack
- COF
- Corona treatment level
- Surface uniformity
- Haze
- Gloss
- Transparency
- Telescoping
- Wrinkles
- Blocking
- Edge damage
- Gel particles
- Contamination
- Splices
- Roll hardness
How to Select the Right Cigarette Shrink Pack Film
A procurement specification can be prepared using the following sequence:
FAQ
What is BOPP Cigarette Shrink Pack Film?
It is a biaxially oriented polypropylene film designed for cigarette pack or carton shrink wrapping. The film is engineered with controlled thermal shrinkage and may include a heat-sealable layer.
What thickness is commonly used?
Typical specifications are approximately 18–25 μm, with 20–23 μm being common starting points for cigarette overwrap applications. The correct thickness depends on the machine and packaging structure.
What makes cigarette shrink film different from ordinary BOPP film?
The cigarette shrink grade is specifically designed around thermal shrinkage, heat sealing, COF and machine feeding requirements. Standard BOPP does not necessarily provide the required combination of these properties.
How is shrinkage measured?
Shrinkage should be measured separately in MD and TD under defined temperature and time conditions.
Can the film be customized?
Yes. Typical customization includes:
What information is required for a quotation?
A technical RFQ should preferably include: Film type + thickness + width + roll length + core diameter + machine model + pack dimensions + shrinkage requirement + estimated order quantity.
Can a sample be supplied?
For a new supplier or replacement material, a sample roll or trial quantity is recommended before bulk production. The film should be evaluated directly on the customer's packaging machine.
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