Every season contractors and farmers experience troubles with netwrap or film when baling and bale wrapping. Most, if not all of these are a result of a fault in the system of baling or wrapping. The system being everything involved in the process of baling and wrapping — from the crop and weather conditions, to the machine and even the operator; and not forgetting the netwrap of stretchfilm.
However, experience has shown that the majority of the problems are wrongly attributed to the netwrap or film and, whilst the problem seems to happen with the both products, it is not necessarily the fault of the product more the way it is being used. In any given year we can guarantee that one or two problems show up time after time, with many seasoned contractors having experienced them at one time or another. In the coming issues, we will be showing some of the most common troubles, why they happen and how to over-come them should they happen to you. We begin here with a very common netwrap problem:-
This problem appears to the end user that the net is split into two or more widths on the roll, no longer feeding into the baler as a complete width of net. The result of this often means net wrapping on the feed rollers or bales only partially covered. Of course, this is a fault in the net . — WRONG!
Netwrap is knitted with a raschael stitch, the same kind used in pullovers etc. and, consequently, the stitch can be pulled out in the same way. This is exactly what has happened when you make a bale like this.
|Because of the way the net is knitted, the risk of a stitch being pulled out may be quite high, if there is the opportunity to do so.|
Netwrap is made up of a web of franze and shuss (warp and weft in household terminology), the franze being the long chains that run the length of the net and the shuss being the zig-zag joining threads. If a franze thread is left longer than the rest of the net web, after a poor cut of the net in the baler example, it can be pulled from the net very easily. For instance, after the net is applied to the bale and cut, a short tail end of net is left hanging in the chamber ready for the next bale. If this tail of net has one or more long threads hanging as the result of a poor cut, the stitch can be pulled out splitting the net.