VACUUM BAGS - SPECIAL FILMS
HEVELYN Thermoforming films are top quality films.
The films are produced in our high tech factory in accordance with the latest technologies. This ensures a top quality film, which is controlled by the computer for an exact thickness, width, correct layers and strength, several times during the production process. HEVELYN films are produced up to 6 layers. For gasflushing an extra EVOH layer can be added.
By using the best quality PA and a special layer technique, HEVELYN films are less weak in the formed corners by an equal or even lower thickness.
The high gloss of HEVELYN films ensures a perfect product presentation.
Of course the contents of your product are to the utmost guaranteed by HEVELYN films because of their excellent gas- and wateraqueous barrier.
HEVELYN films also save time and energy:
The films run practically without errors, so machines can run on a higher speed, which gives less waste. The bottom film will be best formed at a temperature between 75◦C and 90◦C, which is a much lower temperature than most other films require.
For an easy opening, a peelable top film can be produced.
Of course printing (with an OPA-layer) and coloring are possible. We produce HEVELYN films for:
- Vacuum packaging
- Gas packaging (M.A.P.)
- Cooking/welling up to 85◦C
- Sous-Vide cooking/Sterilizing up to 120◦C
What is vacuum packing?
Vacuum packing is packing a product in a bag or piece of film with a low oxygen density, from which all the air is removed and closed off through a seal.
What is vacuum packing used for?
With food products, vacuum packing is especially used to prolong the tenability of the product without loss of quality. Vacuuming is sometimes also used to ripen products, such as fresh meat and specific types of cheese. For (technical) products that are sensitive to rust or dust, vacuum packing is a good solution.
What products are suitable for vacuum packing?
Meat-products and sausages, cheese, fish, seasonings, spices, chemical products et cetera.Also products like technical parts of computers, clothes and even money can be vacuum packed. In short, the possibilities are endless.
From what material are the vacuum bags and films made of?
The HEVEL PA/PE vacuum bags and films are made of a coextruded multiple layer film consisting of selected raw materials such as polyamide (barrier) and polyethylene (sealing layer), and on request additionally with EVA, Surlyn or EVOH.
How important is the choice of material?
The amount of air that can enter the package has a direct influence on the tenability and quality of the vacuum packed product. When choosing the material it is very important that the significance of the oxygen transmission rate is kept in mind. The suitability of the material should be placed above the price.
Is there special equipment needed for vacuum packing?
For vacuuming, there is a special vacuum machine required. The products are being packed into the vacuum bags by hand, and the machine automatically removes all the air out of the bags. There are also full automatic thermo-forming machines on the market, which can make a fitting vacuum bag around the product, created by topfilm and bottomfilm. With "tray"-machines, it is also possible to vacuum pack, although those machines are more frequently used for gas packaging (M.A.P.)
Is there an alternative for vacuum packing?
Usually gas packaging (M.A.P.) is used as an alternative for vacuuming. However, the gas packaging is more of an expansion of vacuum packing. Because the gas mixture is gushed into the bags only after they have been vacuumed. Gas packaging and normal vacuuming can usually be done with the same equipment.
Does the packer require special knowledge?
The tuning of the machines is quite important. It happens too often that the package does not meet the requirements because the seal is not correct or wrongly formed. Besides top-quality material, knowledge of the vacuum machine is a must.
Is it possible to achieve material reduction? (use thinner bags)
A material reduction is possible for most products, but only if the oxygen transmission rate of the bag or film is not compromised. Material reductions of approx. 10% can be realised with some suppliers, started by Hevel.
What is the trend in vacuum packing?
THE trend at this moment is gas packaging. It is remarkable however, that for various products the thin, soft bottomfilm is replaced by a much thicker and tougher film, from which a "tray" can be made. This is, obviously, a notable increase in materials used.