Maximum Efficiency: Inline Pre-Stretch Production
SML was presenting its inline pre-stretch unit to an expert audience for the very first time – up close in operation at Innovations Days 2024. Integrated in a SmartCast Infinity stretch film line, the system is setting a new standard for efficiency in production. The advantages of the inline manufacturing of pre-stretch film are evident: Ultimately, they result in significantly lower production efforts.
The aim of pre-stretching is to reduce the thickness of stretch wrap film, for example from 23 mic to 8 mic, and simultaneously to achieve a stiff and rigid product. “Historically, it has been common practice to manufacture pre-stretch film in two separate production stages: film production and offline pre-stretching on a separate rewinder”, Thomas Rauscher, Product Manager at SML, explains. This was, for a long time, the most economical solution to achieve extremely thin and stiff stretch film.
Advanced winding technology enables inline production
“With the SmartCast Infinity we have developed an inline pre-stretch unit followed by an ultra high-speed winder. The whole process runs in an absolutely stable manner. The production speeds attained of 800 m/min or even 900 m/min were astonishing, and has taken the inline solution to a whole new level of efficiency!” Thomas Rauscher states.
Ready-to-sell products straight from the line
The greatest advantages of the inline production of pre-stretch film are the savings in terms of labour and logistics costs, as the product is ready to sell when it comes off the winder. All of this leads to a significantly more efficient production process.
Approved for SmartCast Infinity and EcoCompact II
The manufactured pre-stretch film can be wound up on 2 -inch, 2 ½-inch and 3-inch cores. The units are designed for the production of “typical” pre-stretch products, such as hand rolls, with folded edges and with oscillated winding as a standard. Core separation at the winder for the usage of different standard core lengths is available as an option. “We have built, tested and approved our inline pre-stretch unit for 2 m and 3 m wide lines. So, it is optimally suited for our SmartCast Infinity and EcoCompact II stretch wrap film lines”, Thomas Rauscher concludes.
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