Product Overview
BOPP Film Slitting Equipment converts wide BOPP parent rolls into multiple finished rolls through controlled unwinding, web guiding, slitting and rewinding. The machine configuration is matched to film thickness, parent-roll dimensions, slit width, finished-roll diameter, core size and required production speed.
BOPP Film Processing
Film Handling
BOPP film requires controlled web movement during unwinding and slitting. Web guiding and tension settings are matched to film thickness and roll dimensions.
Roll Formation
Rewinding conditions determine the finished-roll profile. Winding tension, pressure and core fit are set according to the required roll structure.
Edge Quality
Knife geometry and cutting conditions affect the slit edge. The cutting system is selected according to film thickness, slit width and production requirements.
Key Equipment Features
Tension Control
Automatic tension control regulates web tension through the unwinding, slitting and rewinding stages. The working range is matched to the selected film specification.
Web Guiding
Automatic edge guiding maintains the web position before slitting and supports consistent knife alignment across the working width.
Slitting Control
Razor or shear slitting can be selected according to film thickness and required edge condition. Knife spacing follows the finished-roll layout.
Rewinding Control
The rewind section manages shaft rotation, winding pressure and roll formation for multiple finished rolls produced from one parent roll.
Typical Technical Parameters
|
Parameter |
Typical Range |
|
Material |
BOPP Film |
|
Film Thickness |
4–80 μm |
|
Working Width |
800–1800 mm |
|
Maximum Unwind Diameter |
600–1000 mm |
|
Maximum Rewind Diameter |
350–600 mm |
|
Minimum Slit Width |
20–50 mm |
|
Maximum Mechanical Speed |
300–500 m/min |
|
Unwind Core |
3 in / 6 in |
|
Rewind Core |
1 in / 3 in |
|
Slitting Method |
Razor / Shear |
|
Web Guiding |
Automatic |
|
Tension Control |
Automatic |
Slitting System Selection
Razor Slitting
Razor cutting uses a fixed blade contact point and is commonly applied to thin film slitting where narrow slit arrangements are required.
Shear Slitting
Shear cutting uses opposing knife edges to separate the film. It is suitable when the cutting geometry and edge condition require controlled knife engagement.
Knife Arrangement
Knife quantity and spacing are determined by the required finished-roll widths. The slit layout should be established from the parent-roll width before production.
Rewinding Configuration
Differential Shafts
Differential winding allows individual finished rolls to maintain controlled winding conditions when multiple widths are produced from the same parent roll.
Core Compatibility
Core diameter must match the rewind shaft configuration. Common production requirements use 1 in or 3 in finished-roll cores, while unwind cores commonly use 3 in or 6 in formats.
Roll Diameter
Finished-roll diameter is selected according to downstream processing, roll weight and handling requirements.
Application Areas
Flexible Packaging
Slit BOPP rolls can be supplied in production widths for packaging film converting and subsequent lamination or printing processes.
Adhesive Tape Base Film
Narrow BOPP rolls can be prepared for coating and adhesive tape converting operations.
Label Materials
Controlled-width rolls can be used for subsequent coating, printing and labelstock processing.
Film Converting
The equipment converts wide BOPP parent rolls into defined production widths for downstream film processing.
Selection Criteria
Film Specification
Confirm film thickness, parent-roll width, surface treatment and winding characteristics before equipment selection.
Parent Roll
Parent-roll diameter, core diameter, maximum roll weight and web width determine the unwind configuration.
Finished Roll
Define slit width, finished-roll diameter, core size and roll weight for the required rewind arrangement.
Production Target
Required operating speed, production volume, roll change frequency and automation level determine the machine configuration.
Quality Control Points
Slit Width
Finished widths are checked against the specified slit dimensions and production tolerance.
Edge Condition
Cut edges are inspected for consistent separation and suitability for the next converting operation.
Roll Alignment
Finished rolls are checked for edge alignment, telescoping and winding displacement.
Tension
Tension settings are verified according to film thickness, web width and roll diameter to maintain the specified winding condition.
Production Integration
The unwind section is matched to the parent-roll width, diameter, core and loading method used in the existing production process.
Finished-roll diameter, core size, roll weight and winding direction should match the requirements of the next coating, printing, laminating or packaging operation.
Working width, machine length, roll handling space, electrical supply and compressed-air requirements should be confirmed during installation planning.
Why Choose BOPP Film Slitting Equipment?
BOPP film slitting requires the cutting, tension and winding systems to work within the material and roll specifications. Film thickness, slit layout, knife configuration, tension range and rewind dimensions are therefore considered together during equipment selection.
The resulting machine specification provides a direct basis for confirming production width, finished-roll format, operating speed and installation requirements.
FAQ
Q: What BOPP film thickness can be processed?
A: A typical configuration covers approximately 4–80 μm. The applicable range depends on the film structure, parent-roll dimensions and selected machine configuration.
Q: What determines the required working width?
A: The parent-roll width and finished-roll layout determine the required working width. The number and width of finished rolls should be confirmed before configuration.
Q: Which slitting method is suitable for BOPP film?
A: Razor and shear systems can be selected according to film thickness, slit width and required edge condition.
Q: What information is needed for equipment selection?
A: Provide film thickness, parent-roll width and diameter, core size, target slit widths, finished-roll diameter, roll weight and required operating speed.
Q: Can different BOPP roll specifications be processed?
A: Different BOPP specifications can be accommodated when they remain within the machine's defined thickness, width, diameter and winding ranges.
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