Basically there are two reasons, firstly for most accurate dosing of the plastic additives, secondly for accurate recording of the grams used per meter of film produced.
The return on investment is based on the percentage of savings of plastic additives and the accuracy of the grams per meter of the film produced.
The superior accuracy of the system allows you to work with a lower percentage of additives per screw. Example: If with your current conventional system you are using 4% of a plastic additive, with the GDS system you can reduce this percentage due to the fact that the dosing control is more accurate and the blend by dosing screws more uniform. This leads to a reduction in consumption of additives and pigments per kg of film produced.
The accuracy of the grams per meter control ensures that each kg of film produced is identical. This helps in the control of the thickness profile and the process in the final finishes. For packaging sold per unit the accuracy ensures that each kg has the same the volume of packaging.
Faults in the gravimetric control leads to several problems and most companies do not know whether the equipment is accurate or not. Without an equipment such as the regular collection of measured film samples from film reels offered by the GPA it is very difficult to identify the variations. This will result in a number of problems in the final packaging process. For this reason, accurate and reliable equipment such as the GDS Gravimetric Dosing Unit ensures stability and confidence in the extrusion process.
The equipment pays for itself in a few months. This is based on the savings made in plastic resin due to the accuracy of grams per meter produced and the reduction of the percentage of pigments and additives used in the process.