This is very fast and simple: just put a ruler or guide on the bench and cut the samples in a strip approximately 10 cm wide. Then insert the film samples into the supplied support rack with guide rollers. The width of the film sample does not have to be accurate, e. g. it can be anything between 7 cm and 10 cm, as the equipment reads in an area of only 4.5 cm. So, no time needs to be lost when preparing the samples. It’s quick and easy.

No. The equipment has two sensors, one capacitive, the other absolute. Before inserting the film sample, the absolute sensor is used to determine the zero point as a reference. After this procedure, the measurement is carried out, the capacitive sensor measuring the film sample and the absolute sensor taking reference points for automatic calibration. For laboratories that require certification for ISO standard we provide a certificate.

Yes, the GPA is flexible. In addition to the DIN and ISO standards, measurement points can be every mm or adjusted to a number of your choice. Example: If only 10 points are required, 10 points are measured.

Yes, this system is widely used to calibrate extruders. Just fix a reference point on the die and mark the bubble exactly above this point. Then measure the sample of the tubular film.
The measured thickness profile will be presented in the polar chart of the GPA-Win software where the number of the die bolts can be selected This information allows the operator to adjust the die by either tightening or unfastening the respective die bolts.

No, in addition to tubular films it also measures segmented film samples individually or joined by adhesive tape.

Yes, laminated, pigmented and film with additives, etc. As the system operates with two types of sensors it is possible to select the measurement mode. Simply disable the capacitive sensor and use only the absolute sensor making point-to-point measurements.

Yes, the software includes a Fourier
Analysis of the measured profile. The results are shown in a graph where sine waves and their importance are analysed to indicate the distribution of symmetrical thick and thin spots. Some of these correspond with symmetrical faults of the extruded film which can be corrected. The importance of the symmetrical fault is indicated by the height of the corresponding vertical bar. For example, a film sample with 8 symmetrical thick and thin spots may indicate a problem of melt distribution caused by wrong temperatures. 6 symmetrical high and low spots may indicate a bad distribution of the cooling air. Often 13 and 15 symmetrical spots occur with an additive not plastifying well. Then just change the additive and make a new measurement to see if the problem disappears.

Yes, as a PDF. You can program this report to include your own logo.

In two ways: The first is using the equipment to check the quality of extruded film, including from machines with online thickness control. This because the GPA is much more accurate measurement device than any online measurement system.

The second is quality control of the production process. Here the data is collected from all film reels of a production order, in this way a history is generated and a pre-established quality standard is created in which the GPA Evo is used to monitor the quality of the film produced.