PROCESSING | THERMOFORMING
Triple Bubble lines currently enable production
of films with up to 17 layers at widths of up to 3,000mm double flat (6,000mm film width). Thermoforming formulations contain well below 10% PA and EVOH and permit a large reduc- tion in thickness. Monomaterial solutions are also possible. A high level of molecu- lar orientation improves the films’ mechanical and barrier properties. “Working with us gives customers
more than just delivery and installation of
Above: Harpak- Ulma’s TFS 216 produces vacuum skin packs on a flat cardboard base IMAGE: ULMA
maximum achievable thermoforming ratio is 1:10. This means a reduction in material consumption – and in greenhouse gas emissions by around 50%. Thanks to optimised cooling rates, the lines can achieve throughputs of up to 2,000 kg/h or annual outputs over 15,000 tonnes – so can surpass the productivity and profitability of cast film lines. Typical applications of these multilayer films include vacuum packaging for transporting and stor- ing large pieces of ham, meat or cheese. Generally based on PA, EVOH and PE, these films combine high transparency with good thermoforming characteristics and elevated puncture resistance.
the Triple Bubble line,” said Jürgen Schiffmann, CEO of Kuhne. “Our service also includes applica- tion-specific film formulation and tuning of process parameters.”
Vacuum skins Harpak-Ulma has developed a thermoforming solution for packaging fresh foods. Its TFS 216 is designed to produce vacuum skin
packs on a flat cardboard base. It uses cardboard roll stock to produce the flat, non-thermoformed base of the packaging – eliminating the need for a plastic tray while generating zero cardboard waste. It is equipped with a bottom film traction system
IMAGE: ULMA
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