Why does a product have to be dry before it is packed?
- A wet product weakens cardboard and egg trays: the water soaks through the packaging
- Labels do not stick to a wet surface
- On cans, remaining water causes oxidation and rust
- A dry surface gives a more reliable seal
- Which vacuum techniques are used in the packaging industry?
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- Vacuum packing: evacuating, sealing and protective gas such as nitrogen for shelf life and colour retention
- Drying before packing and labelling: air knife with blower
- Vacuum lifting: picking up boxes, sheets and products with suction cups
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- Why does a product have to be dry before it is packed?
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- A wet product weakens cardboard and egg trays: the water soaks through the packaging
- Labels do not stick to a wet surface
- On cans, remaining water causes oxidation and rust
- A dry surface gives a more reliable seal
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- Side channel blower or vacuum pump for picking up packaging material?
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The choice follows from the material being picked up, not from the machine.
| Material | Property | Suitable technique |
|---|
| Cardboard, paper, filter material | Porous: air flows through the material | Side channel blower, high flow and less deep vacuum |
| Glass, sheet steel, film | Non-porous: seals off completely | Compact vacuum pump, little volume and strong suction |
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- Can DOVAC replace or service the vacuum pump in my existing packaging machine?
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Yes. Many packaging machines arrive from Italy, Germany or the United States with a pump fitted as standard.
- DOVAC is the Benelux agent for the brands it represents: service, parts and replacement pumps without going through the machine builder, and therefore without an extra margin
- For new machines the preferred pump can be fitted by the machine builder on request
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