Product Overview
PET Film Slitting Equipment converts wide PET parent rolls into narrower finished rolls for packaging, printing, laminating and industrial film processing. The machine integrates unwinding, web guiding, longitudinal slitting and rewinding in one production line. Configuration is based on PET thickness, working width, parent-roll diameter, finished-roll diameter, slit width, core size and required running speed.
PET Film Processing
Film Thickness
PET thickness affects web tension, cutting conditions and winding pressure. Thin films require careful tension settings and web handling, while thicker films require suitable cutting force and roll support.
Surface Condition
Untreated, treated and coated PET films can require different process settings. Film surface, coating structure and winding requirements should be confirmed before selecting the slitting configuration.
Slitting System
• Knife Selection
Razor or shear slitting can be selected according to film thickness, slit width and required edge condition. Knife type and positioning are matched to the planned finished-roll layout.
• Slit Arrangement
The knife station is configured around the number and width of finished rolls required from each parent roll. This determines knife quantity, spacing and effective material utilization.
Tension Control
• Unwind Tension
Unwind tension changes as the parent-roll diameter decreases. The control system maintains the required web tension according to film thickness, width and roll weight.
• Rewind Tension
Rewind tension is adjusted during roll buildup. Correct settings influence roll hardness, winding density and the geometry of the finished rolls.
Web Guiding
Web Position
The guiding system corrects lateral film movement before the web reaches the slitting section. Accurate positioning keeps the cutting line aligned with the specified slit layout.
Edge Control
Stable web position helps maintain repeatable finished widths, particularly when narrow PET rolls are prepared for subsequent printing, coating or laminating processes.
Rewinding Performance
Roll Formation
Each slit web is wound onto an individual core. Rewind conditions are controlled as the roll diameter increases to maintain the required roll structure.
Core Configuration
Core diameter, core width and shaft arrangement are selected from the finished-roll specification. These dimensions should be confirmed together with downstream handling requirements.
Typical Applications
Slit PET rolls can be prepared for flexible packaging production where defined web widths are required for printing, laminating or further converting.
PET films used for insulation, electrical applications, protective materials and other industrial processes can be converted into specified roll widths.
Coated PET requires attention to surface condition, coating thickness and winding pressure. The slitting setup is selected according to the material structure and finished-roll requirements.
Key Advantages
Controlled Film Tension
Regulated unwind and rewind tension supports predictable film movement from the parent roll through the cutting and winding stages.
Flexible Slit Layout
Knife positions can be changed for different finished-width combinations within the available working width.
Defined Roll Structure
The rewind section controls core positioning, roll buildup and finished-roll diameter to produce the specified roll format.
Technical Parameters
|
Parameter |
Reference Value |
|
Process Material |
PET Film |
|
Film Thickness |
12–180 μm |
|
Working Width |
1,300 / 1,600 mm |
|
Maximum Unwind Diameter |
1,000–1,400 mm |
|
Maximum Rewind Diameter |
600–800 mm |
|
Maximum Mechanical Speed |
500 m/min |
|
Minimum Slit Width |
10 mm |
|
Unwind Core |
3 in / 6 in |
|
Rewind Core |
3 in |
|
Slitting Method |
Razor / Shear |
|
Web Guiding |
Automatic |
|
Tension Control |
Automatic |
Selection Criteria
Film Range
Confirm the complete PET thickness range before final configuration. The required knife and tension setup should cover the intended production range.
Parent Roll
Working width and maximum parent-roll diameter determine the required unwind capacity. Roll weight should also be considered during equipment selection.
Finished Roll
Finished-roll width, diameter and core size determine the rewind arrangement and shaft configuration.
Production Rate
Required output should be assessed together with film thickness, slit width and winding requirements. The usable production rate depends on the complete process setup.
Quality and Production Considerations
Mechanical Alignment
Rollers, shafts and knife holders should remain accurately aligned through assembly and commissioning. Alignment directly affects web tracking and slit positioning.
Process Testing
Testing should cover web guiding, tension response, knife positioning and finished-roll formation using PET film representative of the intended production material.
Specification Check
Before final production, confirm film thickness, working width, parent-roll diameter, finished-roll diameter, slit widths, core dimensions and required operating speed.
FAQ
Q: What PET film thickness can be processed?
A: The reference range is 12–180 μm. The actual processing range depends on film structure, width, roll dimensions and the selected slitting configuration.
Q: How is the slit width determined?
A: The required finished-roll widths and the number of rolls across the parent web determine knife quantity and knife spacing.
Q: What information is needed for machine selection?
A: The main specifications are PET thickness, parent-roll width and diameter, finished-roll widths, finished-roll diameter, core size and required operating speed.
Q: Can different roll sizes be processed?
A: Yes. Unwind and rewind dimensions can be configured according to the required parent-roll and finished-roll specifications.
Q: Which slitting method is suitable for PET film?
A: Razor and shear slitting can both be used. Selection depends on film thickness, slit width, edge requirements and the production process.
Q: Can the equipment be configured for a specific PET film?
A: Yes. The slitting, tension, guiding and rewinding configuration can be matched to the actual PET film specification and finished-roll requirements.
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