Goettfert-Dataphysics Instruments India Private Limited Entally, Kolkata, West Bengal

The wetting properties of com­mon solids can be measured with electronic tensiometers, which have evolved into dynamic contact angle meters. The extensive application of internal and external computer control has provided for a high level of automation and the generation of highly reproducible results in the determination of wetting properties exhibited by powders, fibres, and fabrics as well as the thermodynamic properties of surfactant solutions.

The dynamic contact angle measuring instrument and tensiometer DCAT 11 is the standard instrument for the weight based measurement of contact angle, surface and interfacial tension, critical micelle formation concentration, density, sedimentation and penetration rate, plus penetration resistance.

The Side Stream Rheometer is based on the first melt return online capillary rheometer developed by GÖTTFERT many years ago. The new SSR uses the same annular melt transfer line as the old (the advantage is that only one tap hole is needed, making installation simple) and no waste stream is generated because the tested material is returned.

The RCR-II is an innovative Capillary Rheometer to determine the flow behavior of rubbers under special physical processing conditions.The test material is placed manually (or optional automatically via an autoloader) into the test barrel. A test piston is pressing the material with constant test force or constant speed through a capillary into free space. The material can be injected into a closed mold as option. The procedure is being performed at a pre-defined test temperature. An integrated touch-screen monitor allows to operate the device, the parameterization, the performance of the test and the evaluation is handled by the PC software RubberView. The measured force, position and temperature are recorded electronically and transferred via Ethernet to the PC for further processing and evaluating. The results are being displayed numerical as well as in curve diagrams and/or send out on a printer. The RCR-II is used in the field of research and development as well as for quality control and inspection of received goods.

It is well known that the elongational flow behavior, which dominates many processing techniques, can not be determined from shear experiments. The patented Rheotens melt tensile testing technique has proven to be highly reproductable and sensitive and will differentiate even polymer melts showing differences in molecular structure, which cannot be detected with other analytical methods.

The smallest one from the RHEOGRAPH family, our RHEOGRAPH 20, controlled with CANBus technology, was not only developed on modern 3D-construction workstations but of course also with the experience and potential from more than 30 years of the numerous generations before. A high rate of automation and user friendliness, a wide shear rate range as well as a test force, which might be sufficient for many applications come as a standard. Many useful options and non-standard features can be realized.

The new developed device is used to determine the Mooney Viscosity and the scorch characteristics recorded over time. Typical test materials are unvulcanised rubber compounds and samples of pure natural or synthetic rubber. A shearing disk viskosimeter with a closed chamber and rotor.The functionality is especially simplified due to the new design.The sample (consisting of two round blanks) is being sheared in the closed chamber by a constant turning rotor. During this procedure the resulting torque is recorded while pressure, temperature and speed are constant.  

One of the most outstanding features of the MINI BYPASS RHEOGRAPH MBR is its compact size. With a width of approx. 150 mm this new system is one of the smallest on-line rheometers available. Even in tight space this new design can be installed without problems. The measuring head weight of only 30 kg eliminates costly mounting arrangements. A new die exchange system makes die changes quick and easy.

The Melt Indexer MI-2. This unique melt indexer can carry out a single weight test according to ISO 1133 and ASTM D1238, procedures B, as well as ISO 1133 and ASTM D1238 Procedure C for the "Half Height / Half Diameter" standard.

For the mapping of wafers or for the automatic analysis of the surface free energy of flat samples such as paint test plates or optical lenses. The ETT/VAC can be equipped with any of a range of different top plates. The fixation of the samples on the top plates is achieved by the application of a vacuum, connected to the turn table.

Advanced instrumentation engineered for classical and new measuring techniques. The wetting properties of com­mon solids can be measured with electronic tensiometers, which have evolved into dynamic contact angle meters. The extensive application of internal and external computer control has provided for a high level of automation and the generation of highly reproducible results in the determination of wetting properties exhibited by powders, fibres, and fabrics as well as the thermodynamic properties of surfactant solutions. DCAT 11 The dynamic contact angle measuring instrument and tensiometer DCAT 11 is the standard instrument for the weight based measurement of contact angle, surface and interfacial tension, critical micelle formation concentration, density, sedimentation and penetration rate, plus penetration resistance.

Dataphysics offer a wide range of temperature and environmental control systems that operate in conjunction with the OCA instruments and supportive software. These systems enable the measurement of surface and interfacial parameters across an incredibly diverse group of applications, at temperatures from -30 to 1800 °C and from a high-vacuum to high-pressure atmosphere. Temperature, pressure, humidity, and other physical parameters can be developed, directly, by these OCA instrument accessories, or with the integration of additional hardware. Liquid temperature control unit for measurement within the range - 10 to 130 °C. Requires an external liquid circulator bath and includes the pipe work etc. to allow for a protective atmosphere (inert gas inlet) to surround the sample working area. The triple diffuser, TDI 100, is a recommended attachment for working temperatures below room temperature to prevent condensation by directing a dry gas flow towards the chamber windows. An optional humidity sensor expands the applicability of the TFC 100 even further.

SVT 20 N The spinning drop video tensio­meter, SVT 20N, is a special purpose optical instrument for measuring of conventional to extremely low interfacial tensions. The control/data analysis software is designed for intuative use and fast access to all control elements.

Whether your application demands the evaluation of contact angle or drop shape, the video-based optical contact angle measuring system, OCA 15EC, is the instrument of choice where initial budgets are limited. The single direct dosing system, SD-DM, together with the electronic dosing unit, ES (both included within the 'system' configured, under the OCA 15EC part number) enable the precise and accurate handling and dosing of liquids.The OCA 15EC can be easily broken down for transportation in the optional case, TBO.

Glass cell (cuvette) made of special optical glass for measuring the interfacial tension between two fluids according to the Pendant Drop method or the contact angle of a fluid drop or a gas bubble in a fluid (e.g. Schultz method) ; up to 70° C.Also available in 'high' temperature version (GC xxHT) and made of Quatrz glass (GC xxQ); 70 to 350° C.

FSH 30 special holder, made of delrin, for the contact angle measurement on thin films. Consisting of base (outer-ø=30 mm) and three rings (inner-ø= 30.0 / 30.1 / 30.2 mm). FSC 80 special holder for the contact angle measurement on thin films or paper; Maximum sample size 80 x 80 x 3 mm. FSC 150 special holder for the contact angle measurement on thin films or paper; Maximum sample size 150 x 90 x 3 mm.

The tilting base unit, TBU 90E, is an important instrument extension for the analysis of hydrophobic materials. It allows the measurement of the advancing and receding contact angle, the rolling angle and the contact angle hysteresis of sessile drops while maintaining a constant visual plane (optics / sample). In conjunction with the SCA software; it facilitates the fully automated execution of rolling angle experiments up to a tilt angle of 90°and at freely adjustable tilt speed of 0.03 to 2.8 °/s.

For use with the OCA 20, OCA 30, OCA 35, OCA 40, and their variants. For the software controlled (automatic) selection and positioning (±0.05 mm) of the dosing needles. Available in four variants, each with the option of further enhancement to the "plus" version with increased positioning accuracy ( ±0.005 mm):

For use with the OCA 20, OCA 30, OCA 35, OCA 40, and their variants. For the software controlled (automatic) selection and positioning (±0.05 mm) of the dosing needles. Available in four variants, each with the option of further enhancement to the "plus" version with increased positioning accuracy ( ±0.005 mm):

CO-ROTATOR The co-rotating twin extruder is an intelligent tool for simulation of Industrial processes in labs and pilot plants. Multiple dies and additional tools enables a easy change over to multiple application.

The smallest one from the RHEOGRAPH family, our RHEOGRAPH 20, controlled with CANBus technology, was not only developed on modern 3D-construction workstations but of course also with the experience and potential from more than 30 years of the numerous generations before. A high rate of automation and user friendliness, a wide shear rate range as well as a test force, which might be sufficient for many applications come as a standard. Many useful options and non-standard features can be realized.The new base scaled model, extendable by approved options.

The Blown Film Unit is a compact unit for blowing, cooling, take off and wind up of extruded hoses. It is suitable for production of small films used by the food industry and in the packaging field where the application of big production machines is often not profitable.

GÖTTFERT Laboratory Extruders are not only just Melt Feeder, but also self-sufficient measuring equipment - therefore Extrusiometer!Flexible in diameter and length, as well as cylinder systems designed according to customer preferences, the numerous positions for pressure transducers or the melt temperature acquisition are only a few highlights of the Extrusiometer family. The shear rate, shear stress or the viscosity are being displayed online. The platform offers also a wide range of options and add-onn systems, like different dies, Online Rheometers, Extensional viscosity testers, film analysis. The Software can be connected to superior Bus systems. With an optional self running Online Sampler System for material feeding a non-stop operation is guaranteed. Please see also the separate brochure “At-Line Station” for more details.