1. Slitter Rewinder
A Slitter Rewinder is a converting machine that performs both slitting and rewinding in one continuous process.
It is designed to convert wide jumbo rolls into narrow, accurately slit finished rolls.
Functions
- Unwinds jumbo roll
- Slits material into narrower strips
- Rewinds each strip onto new cores
Best For
- BOPP, PET, CPP, LDPE/HDPE
- Laminates & flexible packaging films
- Paper, foil, non-woven materials
Advantages
- Suitable for general slitting applications
- High speed & stable tension control
- Produces uniform finished rolls
Ideal Usage
Mass production where consistent slitting accuracy and high throughput are required.
2. Duplex Slitter Rewinder
A Duplex Slitter Rewinder is an advanced version of the standard Slitter Rewinder, featuring two rewind shafts (duplex winding).
This allows faster roll production, improved tension control, and higher output quality.
Functions
- Dual-shaft rewinding
- High-speed slitting
- Precision tension management across each slit roll
Best For
- Thin films requiring precise tension
- High-volume production lines
- Narrow-width slitting
- Materials sensitive to tension variation
Advantages
- Faster production due to dual rewinding
- More stable rewind roll density
- Reduced telescoping & edge variation
- Better suited for high-speed flexible packaging applications
Ideal Usage
Converters requiring premium roll quality, high slitting speeds, and narrow slitting tolerance.
3. Doctoring Rewinder (Inspection Rewinder)
A Doctoring Rewinder, also known as an Inspection Rewinder, is not primarily a slitting machine.
Its main purpose is to correct, inspect, and rework printed or slit rolls.
Functions
- Removes defects such as misprints, splices, wrinkles
- Rewinds, re-inspects, and corrects finished rolls
- Can add missing labels or re-register print alignment
Best For
- Printed rolls
- Laminated materials
- Rolls requiring quality checking before shipment
Advantages
- Fixes defects without re-running the entire production
- Improves final roll quality
- Speeds up QC and post-production processes
Ideal Usage
Quality control departments handling printed rolls, laminates, or rejected rolls requiring correction.
Summary Comparison Table
| Feature / Machine Type | Slitter Rewinder | Duplex Slitter Rewinder | Doctoring Rewinder |
|---|---|---|---|
| Primary Function | Slitting + Rewinding | High-speed dual-shaft slitting | Re-inspection & roll correction |
| Slitting | Yes | Yes (more precise) | Optional (not primary) |
| Rewinding | Single/duplex | Dual (two shafts) | Single or dual |
| Speed | Medium–High | Very High | Medium |
| Tension Control | Good | Excellent | Controlled for inspection |
| Best For | General film/paper slitting | High-speed flexible packaging | QC, print inspection, defect removal |
| Roll Quality | High | Premium | Corrected |
| Use Case | Standard converting | High-volume converting | Quality correction & rework |
Which Machine Should You Choose?
Choose Slitter Rewinder if:
You want a general-purpose, reliable slitting solution for films, paper, foil, and laminates.
Choose Duplex Slitter Rewinder if:
You need high-speed production, narrow slitting accuracy, and premium roll quality for flexible packaging materials.
Choose Doctoring Rewinder if:
You need to inspect, correct, or rework printed/slit rolls before shipping to customers.
📞 Need Help Choosing the Right Machine?
KEW International manufactures all three—Slitter Rewinder, Duplex Slitter Rewinder, and Doctoring Rewinder—customized to your material type and production requirement.
📞 Call / WhatsApp: +91 8460728298
📧 Email: info@kewindia.com