Executive summary This clip shows how we pack a flat pancake coil of black hose. An operator lays the coil on the L-bar sealer, the sealing frame closes a bag of centre-folded film around it, and a heat shrink tunnel pulls the film tight. The coil comes out sealed on both faces and round the edge, so dust and moisture stay out. The sealer and tunnel are sized to the coil OD.
Table of Contents
- What the clip shows
- Why shrink film for pancake coils
- L-bar sealer features
- Film size per coil
- Selection checklist
- Safety
- Engineering FAQ
- Next step
- Related reading
- Sources
What the clip shows
| Step | What you see |
|---|---|
| Loading | An operator lays a flat coil on the sealer table, inside the folded film |
| Sealing | The L-shaped sealing frame comes down and seals and cuts the film round the coil |
| Controls | The sealer and tunnel each have digital temperature controllers |
| Shrinking | The bagged coil runs through a heat tunnel with a red curtain |
| Result | The operator lifts out the coil, sealed tight in clear film, with the centre hole visible through the film |
Why shrink film for pancake coils
- Holds the coil flat. Tight film keeps the turns of a flat coil together in handling.
- Clean surface. The coil is sealed on both faces and round the edge against dust and moisture.
- Visible product. Clear film lets the customer see the hose and its label.
- Stackable. Flat, sealed coils stack neatly in cartons or on pallets.
L-bar sealer features
Our L-bar sealers share these published features:
| Feature | Published detail |
|---|---|
| Sealing type | L-bar sealing |
| Knife | Alloy sealing knife with anti-stick Teflon coating |
| Temperature control | Omron digital temperature controller |
| Film | Centre-folded polyolefin (POF) film |
| Knife protection | Automatic protection and alarm function |
The sealer and tunnel size are chosen per project from your coil OD and height.
Film size per coil
Worked example (illustrative).
| Item | Value |
|---|---|
| Coil size (illustrative) | 600 mm OD × 80 mm high |
| Film opened over both faces, 600 + 80 + 600 | 1,280 mm, so centre-folded film of about 680 mm folded width |
| Film length per coil, 600 + 2 × 50 mm seal allowance | 700 mm |
| Film area per coil, 1.28 × 0.70 | about 0.9 m² |
Selection checklist
- Coil OD, ID and height.
- Coil weight.
- Coils per hour.
- Film type (POF as standard).
- Manual loading or a conveyor from the coiler.
- Cartons or pallets after wrapping.
Safety
- Keep hands clear of the sealing frame while it closes.
- The tunnel and curtain are hot; let coils cool before handling.
- Stop the machine before clearing a film jam.
- For CE markets, the machine is designed to ISO 12100 and EN 415-10.
Engineering FAQ
Q: Why use an L-bar sealer for pancake coils? A: The L-shaped frame seals two sides of centre-folded film in one stroke, closing a bag round the flat coil.
Q: What film does it use? A: Centre-folded polyolefin (POF) film.
Q: How much film does one coil use? A: About 0.9 m² for a 600 mm OD × 80 mm coil in the worked example.
Q: How is the sealing temperature set? A: On an Omron digital temperature controller.
Q: Is the centre hole covered? A: Yes. The film encloses the whole coil, and the centre hole stays visible through the clear film.
Q: Which standards apply? A: For CE markets, ISO 12100 and EN 415-10.
Next step
We size a pancake coil shrink packing machine in three steps:
- Submit your layout drawing with coil OD, ID, height, weight and coils per hour, to info@fhopepack.com.
- Receive a proposal within 48 hours with the machine data and layout.
- Book a site survey so we confirm loading and outfeed.
Related reading
- Big Hose Online Coiling and Strapping
- Cable Coil Rewinding, Strapping and Shrink Packing Line
- Long Carton Strapping and Shrink Wrapping Line
- L-bar sealer data
Sources
- Clip: the video on YouTube
- L-bar sealing, knife, temperature control, film and knife protection: L-bar sealer data
- Film size: our worked example, illustrative values
- Standards scope: ISO 12100:2010; EN 415-10:2014
- Proposal timing: approved house CTA (proposal within 48 hours)
Last reviewed: 2026-10-10
