The top of the bag is made of polypropylene film and it is easy to open. This polypropylene film is specially developed by Exxon Mobil and can tear across the film instead of being torn in the direction of the film in a conventional manner.
For 6 years, Rovema has been working on mechanical assembly to produce its Stabilo bags and is suitable for a variety of package sizes. However, the company has previously used square shaped tubes to limit the cross-sectional area, which is not conducive to filling into bags.
In order to solve this problem, Rovema has developed circular shaped tubes for Stabilo bags, which greatly increase the cross-sectional area and facilitate the filling of bags of various sizes. The use of round tubes increases the speed of production and can be compared with pillow-type bags. At the same time, it can also reduce the congestion caused by the product in the filling tube.
Round shaped tubes also have advantages for powder product packaging because large diameter screws can be used for powder metering to speed production and reduce product damage.