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HomeProduct Units / Polytest Line

Manual Pressure Filter Test


Model: FT MP

Collin pressure filter tests can determine the difference in quality of a polymer through agglomerates, insufficiently dispersed fillers or impurities. They can be used in the field of production development for optimising colour masterbatches, for quality control or output and input control of masterbatches, compounds or polymers. The pressure filter tests can also be combined with numerous extruders or compounders.

Easy and secure material testing without extruder stop. A filter cassette in pre-heating position allows for a quick, clean and manual filter change without extruder stop. During the filter change, the melt is deflected via a bypass valve in front of the filter. Additionally, an optionally available twin-chamber hopper facilitates the test procedure and saves working time.

Automated Pressure Filter Test


Model: AFT MP

Collin pressure filter tests can determine the difference in quality of a polymer through agglomerates, insufficiently dispersed fillers or impurities. They can be used in the field of production development for optimising colour masterbatches, for quality control or output and input control of masterbatches, compounds or polymers. The pressure filter tests can also be combined with numerous extruders or compounders.

The screen change is done automatically in this version. During the filter change, the extruders and melt pumps continue to work. A filter magazine for up to 20 filter cassettes ensures the continuous operation of the pressure filter test. The automatised pressure filter test is used for example for pressure filter tests or for the quality control in recycling.

Automatised Pressure Filter Test with Autosampler


Model: AFT MP E 20 Autosampler

Collin pressure filter tests can determine the difference in quality of a polymer through agglomerates, insufficiently dispersed fillers or impurities. They can be used in the field of production development for optimising colour masterbatches, for quality control or output and input control of masterbatches, compounds or polymers. The pressure filter tests can also be combined with numerous extruders or compounders.

With its full automation, the Collin pressure filter test with autosampler considerably shortens downtimes and provides a very high reproducibility. The unique automatic material and screen change systems allow for processing up to seven material samples one by one - without system stop.

Online Viscometer


Model: MOV

The online viscometer of Collin provides a continuous control of the melting viscosity on a production extruder.Two melt pumps with only a single drive ensure that the melt is kept under control permanently. Apart from the compact design, the measuring device of Collin also features a high degree of automation, flexibility and a closed loop. The latter means that no waste is created when the melt is returned into the extruder.

Rheometer


Models: MOR, WROR

Rheometers serve in determining the melt viscosity, thus they are an essential element of the permanent quality control during polymer processing.

The Mono Online Rheometer MOR is used for measuring a viscosity curve on polymers. The viscosity is measured by using a melt flow which flows through a round capillary. The melt is either directly taken out of the extruder or as a side flow.

The Wide Range Online Rheometer WROR determines the viscosity of a plastic melt using different shear rates. The range of shear rates is very broad due to the 3-capillary concept of Collin. The viscosity curve can be determined online at many points. A triple spindle distribution pump provides an even melt distribution on three capillaries.

Film inspection


Models: COFIS, COFICOS

The Collin Film Inspection System COFIS is a remarkably high-quality test system which allows for a definition of up to 10 error classes and 14 error criteria. The line determines optical mistakes in a running flat or blown film. Between the cooling and take-off rolls, a LED light source as well as a line camera are installed. Thus, errors in the film can be detected and evaluated.

The COFICOS line is suitable for tests under unfavourable conditions close to a production line. The flat film die points inside a closed test room with light source and camera. This way, no foreign particles get on the test film. The flat film line is suitable for an optical film inspection for standard polymers with a maximum film thickness of about 100 µm.

The line is moveable and comprises the film production unit (optionally with camera) and the take-off unit, depending on the order with a winder or a cutter as well as with sorting of marked and unmarked samples.

Multi-Inspection


The Collin multi-inspection impresses through its broad range of possible applications - the multi-purpose film quality test device measures, depending on the customer‘s needs, optically, mechanically and rheologically. The lines have a modular design. They consist of a chill roll unit with a subsequent roll mill for optical and mechanical film inspection including a film winder and optionally upstream rheological measuring section.

Closed chill roll line for optical film inspection system
The complete unit is entirely closed with the exception of the entry of the film die. This test chamber is set to overpressure during operation in order to prevent ingress of dirt or dust.

Optical film inspection
After the chill roll, the film runs across the optical inspection field, consisting of a lighting unit and a camera. At the moment, further available units are a colorimetry system with colour sensor and a NIR measuring system for identifying foreign polymers.For the inspection system (optical, IR, colorimetry, etc.) proven Collin single components are used. Implementation into the system is done centrally.

Mechanical inspection
Along the measuring distance, a defined expansion is inserted into the film via two rotating roll pairs. The necessary forces are measured on the line. In doing so, the ratio between stress and strain can be determined online. For further processing of the film resp. edge strips, film winders, a cutting system or extraction are available.

Technical center, test laboratory


In order to optimally support Collin customers, in our technical center, also Polytest Line measuring devices for testing purposes are available.

Furthermore, we also offer material tests as service:

  • Viscosity measurement via WROR
  • Film characterisation via COFICOS or multi-inspection MFR/MVR measurement
  • Microscopic examinations
  • Film tensile test
  • Moisture measurement

Additionally, we can support our customers in product development via simulation methods (flow simulations).