Kertas gulungan baja dan mesin pembungkus film

> **Ringkasan Eksekutif**
>
> A steel coil paper and film wrapping machine lays paper on the coil first and stretch film over it, so the coil gets a breathable inner layer and a sealed outer one. Our FPW-300 and FPS-400 ring wrappers take paper and film rolls of 100–150 mm width and 100–450 mm OD, with overlap set from 10% to 90%. A worked example compares two passes with double-layer wrapping: 79 ring wraps against 46.

Daftar Isi

Why paper and film together

Film alone seals a coil well, but a coil that is packed warm or moves through climates can sweat inside sealed film. Paper alone breathes, but tears and lets water in. Paper next to the steel and film over it gives both: the paper takes up condensation and protects the surface, and the film keeps out rain and dust and holds the paper in place.

Where rust is the main risk, the paper can be a VCI (vapour corrosion inhibitor) paper.

Our vertical ring wrapper for paper and film

The coil stands on its edge, eye horizontal, on yellow carrier rollers in a blue base frame. A vertical wrapping ring passes through the eye and carries the material round the coil section while the rollers turn the coil. A yellow mesh guard closes the ring area. The operator ties the material on, steps back to the control cabinet beside the machine and starts the automatic cycle. Roller conveyors on each side bring the coil in and take it out.

Wrapping a coil in paper and film

1. **Coil in.** The coil runs onto the carrier rollers and is centred on the ring.
2. **Paper on.** The paper roll is loaded on the ring and its end fixed to the coil.
3. **First layer.** The ring wraps paper round the section while the coil turns once.
4. **Film on.** The film roll goes on and the cycle runs again, film over paper.
5. **Coil out.** The film is cut and the coil runs out.

With double-layer wrapping, paper and film are carried together and steps 3 and 4 become one cycle.

FPW-300 and FPS-400 data

From our FPW-300 and FPS-400 steel coil wrapping machine pages:

| Item | FPW-300 | FPS-400 |
| :--- | :--- | :--- |
| Coil ID | 508–610 mm | 508 / 610 mm |
| Diameter Luar Kumparan | 600–1,200 mm | 800–1,400 mm |
| Lebar kumparan | 100–300 mm | 100–400 mm |
| Berat kumparan | 20–1,000 kg | 100–2,000 kg |
| Materials | PVC, LLDPE, PE, paper, HDPE | PVC, LLDPE, PE, paper, HDPE |
| Material roll | core 50 mm, OD 100–450 mm, width 100–150 mm | core 50 mm, OD 100–450 mm, width 100–150 mm |
| Tumpang tindih | 10–90% | 10–90% |
| Daya | 1.5 kW | 4.0 kW |
| Air supply | 4–6 bar | 5–7 kgf/cm² (about 4.9–6.9 bar) |
| Loading | rolling in and out | top loading by crane or forklift |

The FPS-400 has the double-layer option, applying two materials at once, for example VCI paper and stretch film. A tension brake on the material release stops the paper folding.

Worked example: two passes or double-layer

Illustrative coil: ID 508 mm, OD 1,100 mm, width 300 mm, 1,000 kg. Paper 150 mm wide at 50% overlap, film 150 mm wide at 30% overlap. The section is 296 mm deep and 300 mm wide, so one wrap is 2 × (296 + 300) ≈ 1.19 m.

First, a check at the OD. The film fans out from the eye: with wraps counted at the ID, 50% paper overlap needs π × 508 ÷ 75 ≈ 22 wraps, but at the 1,100 mm OD those 22 wraps sit π × 1,100 ÷ 22 ≈ 157 mm apart, wider than the 150 mm paper. The outside would show gaps. So we count wraps at the OD:

| Layer | Advance per wrap at the OD | Wraps | Material on coil |
| :--- | :--- | :--- | :--- |
| Paper, 50% | 150 × 0.5 = 75 mm | π × 1,100 ÷ 75 ≈ 46 | 46 × 1.19 ≈ 55 m |
| Film, 30% | 150 × 0.7 = 105 mm | π × 1,100 ÷ 105 ≈ 33 | 33 × 1.19 ≈ 39 m |

**Two passes:** 46 + 33 = 79 ring wraps, plus a second tie-on and a roll change.

**Double-layer:** both materials go on together, paced by the paper, so about 46 wraps; the film follows at the paper's overlap.

**Result.** Double-layer saves about 33 ring wraps, about 42% of the ring time, and one tie-on. The film then runs at 50% overlap instead of 30%, using about 55 m instead of 39 m. Where output matters, double-layer pays; where film cost matters, two passes do. Ring speed sets the seconds: t = wraps ÷ ring speed.

Choosing the paper and the film

- **Crepe paper:** stretches a little and follows the coil edges.
- **VCI paper:** for coils at risk of rust in storage or sea freight.
- **LLDPE stretch film:** the usual outer layer.
- **Woven belt:** for heavy handling, where film alone would tear.

Daftar periksa pemilihan

1. Diameter dalam (ID), diameter luar (OD), lebar, dan berat kumparan.
2. Inner material: crepe, kraft or VCI paper.
3. Outer material and overlap.
4. Two passes or double-layer.
5. Loading: roller conveyor, crane or forklift.
6. Kumparan per jam.

Keamanan: EN 415-10 dan ISO 12100

Our ring wrappers are designed to EN 415-10, with an ISO 12100 risk assessment behind the CE file. The ring passing through the eye and the carrier rollers are the main hazards. The yellow mesh guard closes the ring area, and the operator starts the cycle from the cabinet outside it. Tie-on and roll change are done with the ring stopped.

Pertanyaan yang Sering Diajukan (FAQ) tentang Teknik

Q: Why does the paper go on first?
A: The paper lies against the steel to protect the surface and take up condensation; the film over it seals and holds it.

Q: Can paper and film go on in one cycle?
A: Yes, with the double-layer option on the FPS-400.

Q: Does paper need a different tension?
A: Yes. Paper is set lighter than film, and the tension brake keeps it from folding.

T: Standar mana yang berlaku?
A: EN 415-10, with ISO 12100 for the risk assessment.

Langkah selanjutnya

1. **Send coil sizes, weights and materials** to info@fhopepack.com.
2. **We choose** two passes or double-layer for your output.
3. **Kami akan membalas dalam waktu 24 jam** dengan tata letak dan penawaran harga.

- [FPS-400 steel coil packing machine (product)](https://www.fhopepack.com/Steel-coil-wrapping-machine/Steel-coil-packine-machine-FPS-400.html)
- [FPW-300 steel coil wrapping machine (product)](https://www.fhopepack.com/Steel-coil-wrapping-machine/Steel-coil-wrapping-machine-FPS-300.html)
- [How to automatically pack steel coils using paper and stretch film](https://www.fhopepack.com/videos/how-to-automatically-pack-steel-coils-using-paper-and-stretch-film/)

sumber

- FHOPE FPW-300 and FPS-400 steel coil wrapping machine product pages
- Our vertical ring wrapper shown above
- Contoh soal: gambar ilustrasi
- Standar: EN 415-10; ISO 12100:2010

Terakhir ditinjau: 18-10-2026

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