Packaging Coffee Beans: Product First, Machine Second
Whole roasted beans are delicate and full of aroma: if packaged incorrectly, they lose a noticeable amount of their aroma within two weeks. Coffee requires the production line to do both at the same time—handle high volumes while protecting the product and preserving its aroma. A Vertical filling and capping machine With a multi-head scale and aroma-sealed bags, this combination has you covered.
Is a VFFS right for your product?
| Requirement | VFFS with a multi-head weigher | Evaluation |
|---|---|---|
| Bean Conservation | Gentle cup feeding, short drop heights | easily achievable |
| Flavor Preservation | Laminated film with an aroma-barrier layer, gas flushing | Standard solution |
| Quantity | 30 to 60 bags per minute. | standard in the industry |
| Bag Shapes | Flat pouches, stand-up pouches with a valve | format-dependent |
Setup of the Roasted Coffee Line
The line consists of four sections: a bucket elevator or belt conveyor for gentle product feeding, Multi-head scale for dosing, a vertical form-fill-seal machine to form the pouches, and a date printer for the best-by date.
The multi-head weigher doses beans with an accuracy of ±1 g for fill weights ranging from 250 to 1,000 g—standard in the industry for 10 weighing heads. The drop height between the scale and the filling hopper determines the percentage of broken beans: Short transfer sections and curved drop tubes keep the percentage of broken beans low.
Flavor Preservation: Valve, Film, and Gas Flushing
Three elements ensure the flavor:
- One-way degassing valve: Freshly roasted beans release carbon dioxide for up to several days. The valve lets CO₂ out but doesn't let oxygen in—without the valve, the bag would swell up.
- Laminated film with a barrier layer: Protection from light and oxygen provided by an aluminum or EVOH core layer; an opaque outer layer protects the oils in the beans.
- Nitrogen flushing: During sealing, N₂ flushes the bag and reduces the residual oxygen to below 2 %. Gas flushing is required for ground coffee and recommended for whole beans.
The seal must be grease-resistant: coffee oils can damage the sealing strips. Easy-to-clean sealing strips and temperature-controlled sealing plates with a tolerance of ±5 °C are standard here.
Four-Step Selection Process
- Define product: Whole beans or ground? Fill weight: 250 g, 500 g, or 1 kg? Ground coffee requires a screw feeder and must be treated with gas—a different dosing system than for whole beans.
- Set the dosage: Multi-head scale for beans at a rate of approximately 30 bags per minute or more; for lower rates, a simpler weighing conveyor is sufficient.
- Determine the bag size and film type: Stand-up pouches with valves require a different set of mold components than flat pouches; the film determines the sealing parameters.
- Services and Surroundings: 30 to 60 bags per minute, depending on the scale; roller bearings and roastery dust require a SS304 stainless steel design.
What You Shouldn't Underestimate About Roasted Coffee
Real-world data from project runs: Bean breakage increases with every bend in the product path—transfer pieces cost less than rejected product. The valve must be compatible with the sealing process; otherwise, it will leak. And the recipe changes: Anyone who later adds ground coffee or coffee pods will need a machine that can be retrofitted with screw feeders. The question of retrofitability should be included in every inquiry.
When a VFFS Isn't Suitable for Coffee
For very small production runs of fewer than 20 pouches per minute and frequent product changes, a semi-automatic machine or vacuum packaging in cans is more cost-effective. VFFS is not suitable for pasteurized products or liquids (coffee concentrate)—in these cases, a dedicated liquid packaging line is the best solution.
Frequently Asked Questions
How many bags of coffee beans per minute is realistic?
The industry standard is 30 to 60 bags per minute using a 10-head scale. Product handling limits the cycle rate more than the machine itself: Above 60 cycles, the number of broken beans increases noticeably.
Does every package of coffee beans need a degassing valve?
For freshly roasted beans, yes—they release carbon dioxide over the course of several days. For beans that have been stored longer (about three weeks or more after roasting), a tight-fitting plastic wrap without a vent is sufficient.
What kind of plastic wrap is commonly used for coffee beans?
An opaque laminated film with a barrier layer to retain aroma, often PET/AL/PE or PET/EVOH/PE. Key factors are an oxygen transmission rate of less than 1 cm³/m² per day and the sealability of the inner layer.
Can ground coffee be dispensed using the same machine?
Yes, if the machine can accommodate a screw feeder. The ground material is dispensed volumetrically via the screw and absolutely requires nitrogen flushing—the changeover involves a change in the dispensing method plus a change in the recipe, not a change in the format part.
Related pages: What is a vertical form-fill-seal (VFFS) machine? | What is a multihead weigher? | Coffee Packaging Machine
Request technical specifications and a quote for your production line. Please specify the product, bag size, and target output (bags/min.) – Request Technical Specifications and a Quote.
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