Kraft Paper Sealing Strip Making Machine
The SD-SS350 converts kraft paper and wire coil into fanfolded sealing strips for plastic and kraft paper bags. It forms strips of 18mm width and 130 to 320mm length at a rate of 140 to 240 pieces per minute. This machine replaces plastic and nylon sealing strips in applications such as bread bags, takeout containers, and retail packaging, enabling a paper-based alternative that is recyclable and compliant with packaging restrictions.
- Replaces plastic and nylon sealing strips with a paper-based alternative that is recyclable and accepted in markets restricting synthetic materials
- Produces fanfolded sealing strips in a single continuous process, reducing manual handling and increasing consistency
- Adjustable strip length from 130mm to 320mm allows one machine to serve multiple bag types and customer requirements
- Operates at 140 to 240 pieces per minute, supporting high-volume bag sealing lines
- Uses standard kraft paper and wire coil materials, avoiding dependency on proprietary plastic components
Why Buyers Choose It
- Plastic and nylon sealing strips are being restricted or rejected by retailers and end customers in export markets
- Manual sealing of bags with plastic strips is slow and inconsistent across shifts
- Reliance on third-party suppliers for plastic sealing strips leads to long lead times and cost variability
- Inconsistent strip length from manual or low-speed machines causes sealing failures and customer complaints
- Lack of a paper-based sealing strip option limits the ability to offer fully recyclable packaging
Who Runs This Machine
- Packaging converters producing kraft paper bags that need a paper-based sealing solution
- Food and beverage packers using sealed plastic or kraft bags for takeaway and delivery
- Bag makers supplying pre-opened bags on a roll to automated filling lines
- Sustainability-focused brands replacing plastic strip closures with paper equivalents
Where This Machine Is Used
- Packaging producers replacing plastic sealing strips in takeout and retail bags with a paper alternative
- E-commerce fulfilment centres automating sealing of kraft paper delivery bags
- Food service suppliers producing sealed bread and snack bags without plastic components
- Bag manufacturers adding sealing strip capability to their existing fanfold or pre-opened bag lines
- Sustainable packaging converters meeting retailer requirements for non-plastic closures
Features And Specifications
Technical features
- Converts kraft paper and wire coil into fanfolded sealing strips in one continuous process
- Adjustable strip length from 130mm to 320mm to match different bag designs
- Production speed of 140 to 240 pieces per minute supports high-throughput packaging lines
- Uses a 3-inch air shaft for paper unwinding and supports wire coil up to 230mm diameter
- Magnetic powder brake and clutch maintain consistent web tension during folding
- C-type folding mechanism ensures precise alignment of fanfolded strips
- Automatic stop at set length prevents over-feeding and roll waste
- Control panel with digital display for speed and length settings
Specifications
| Machine model | SD-SS350 |
|---|---|
| Finished strip length | 130mm - 320mm |
| Finished strip width | 18mm |
| Speed | 140 - 240 pcs/min |
| Max. paper unwinding diameter | 500mm |
| Max. wire coil diameter | 230mm |
| Max. paper roll inner diameter | 80mm |
| Max. coil inner diameter | 80mm |
| Total power | 10kw |
| Gross weight | 1500kg |
| Overall dimensions | 6800 x 1100 x 2000 mm (L x W x H) |
How The Machine Runs
Materials
- Kraft paper reels up to 500mm diameter and 80mm inner diameter
- Wire coil up to 230mm diameter and 80mm inner diameter
- Optional soft paper backing layer for improved strip adhesion
Quality Control
- Magnetic powder brake and clutch maintain consistent tension to prevent misfolding
- C-type folding mechanism ensures uniform fold alignment across the strip
- Digital control panel verifies set length and speed before start-up
- Machine is test run with customer materials before shipment
- Folding accuracy is checked during initial production runs
Customisation
- Strip length can be adjusted within 130mm to 320mm range for different bag types
- Folding mechanism can be modified for different fold patterns if required
- Power supply can be built to match the voltage and frequency of the destination country
- Rewinding core size can be adapted to match existing core stock
- Optional paper backing layer can be added for improved sealing performance
Certifications
- ISO9001:2000 certificate obtained in 2005
- CE certificate obtained in 2006
How It Compares
| Plastic or nylon sealing strips | Paper strips are recyclable and accepted in markets restricting synthetic materials, though they may require a different sealing method |
|---|---|
| Manual sealing of bags | Automated strip making reduces labour and ensures consistent strip length and fold quality |
| Buying pre-made sealing strips | Converting in house removes supplier dependency and allows custom strip length, but requires inventory of paper and coil |
Running It On Your Floor
- Ensure the kraft paper reel is within 500mm diameter and 80mm inner diameter
- Load the wire coil onto the coil stand, ensuring it is within 230mm diameter and 80mm inner diameter
- Set the desired strip length and speed on the control panel before starting
- Start at a low speed and increase gradually to check fold alignment and web tracking
- Inspect the first few fanfolded strips for consistent length and fold quality
- Keep the folding rollers clean to prevent paper jams and misfolds
Kraft Paper Sealing Strip Making Machine FAQ
What is the range of strip length this machine can produce
The SD-SS350 produces sealing strips from 130mm to 320mm in length, adjustable via the control panel.
What paper and coil sizes can it handle
It supports kraft paper reels up to 500mm diameter and 80mm inner diameter, and wire coils up to 230mm diameter and 80mm inner diameter.
How fast does it run in production
The machine operates at 140 to 240 pieces per minute, depending on material and settings.
What power supply is standard
The machine uses 10kw total power. Standard voltage is 380V three phase, but we can build to your country's voltage and frequency on request.
What is the footprint for installation
The machine is 6800 x 1100 x 2000 mm (L x W x H) and weighs 1500kg, so plan for a level floor and access for a forklift.
Can it make strips for different bag types
Yes, the strip length is adjustable from 130mm to 320mm, allowing it to serve multiple bag designs.
Do you hold quality certificates
Wenzhou Snda Machinery holds an ISO9001:2000 certificate obtained in 2005 and a CE certificate obtained in 2006.
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Quote The Kraft Paper Sealing Strip Making Machine
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