ODSTM-1 optical dynamic and online control of surface tension, surface energy - dyne level - at running plastic films former German patent application DE19543289 - modifications with monolithic spectrometer processes Introduction of the ODSTM-1 technology.
World-wide there is currently no any tough-less and optical inline operating system for surface tension - surface energy or dyne level - or control system existent. Here is an inconceivable market potential on account of the wide area of applications of surface treated or non-treated plastic films, fleeces, laminates, coated paper or other webs.
Various companies in EU and world-wide are very interested in buying the ODSTM-1 control system and/or interesting on licensing, knowledge participation etc. Significant meetings and letters of intents have been done.
State-of-the-art of static measuring devices For the state of the art technologies I collected a number of publications and patent applications concerning STATIC SURFACE TENSION controlling. In this case of relatively wide applications, the subject of which is preferably static detection and formation of the surface tension value with sequentially applied drops of liquid and imaging systems, are surely of special importance. These includes the patents DE4102990, DE3808860, EP0237221, DE3410778.
During the last two decades I created a large number of patents and projects which had optical online porosity or permeability controlling on running webs as their subjects which are used in the world-wide paper finisher and refining industries. Their physically and process applications and as well their industry demands are very similar and close to surface tension control at running plastic films.
Actual projects situation of the ODSTM-1 development project and further information concerning publications, patents and engineering reports are specified in the above mentioned applications. Several spectral measurements as well the feasibility study with well known optical institutes are positive done.
Furthermore some significant modifications and breakthrough of the base ODSTM-1 measuring process with the using of state-of-the-art monolithic spectrometers and PC support.
Specific information about the actual development and project status of the ODSTM-1 system on request.
Concerning the actual ODSTM-1 development and project status after a longer history : with a well known optical institute with did a large number of specific measurements with a monolithic spectrometer in a wave range between 1200 - 1600 nm all measurements where based on the detection principle which is described in the former patent application.
we used non-treated LDPE films in 70 and 90 m thicknesses and 28 mN/m for their comparison we used the same LDPE films with one side corona treated with 38, 48, 52 and 60 mN/m their test results where positive with a good prospect to going further in that way Base performance of the ODSTM-1 system In the following a global summary of the benchmark figures of the optical online surface tension measuring systems ODSTM-1 is given:
Measuring head : stationary and/or scanning across the running web Webs widths : up to 6000 mm Web speeds : up to 600 m/min Substrates : BOPP, LDPE, PE, PP, HDPE, PET, PPS, etc.
Measuring range of surface tension/energy : 30 - 55 mNm dyne - Resolution/reproduction: +/- 1 mNm - dyne - Range of IF-wave length: 1200 nm - 1600 nm Working principle: dual diffused light/multiple sensor measuring process with variable wave lengths in transmission mode Measuring process : similar as the Elipsometrie Measuring gap: between 5 - 20 mm depends of the application Measuring head, stationary and/or scanning head across the web Monolithic spectrometer, fibre-optical, sensor integration Industrial PC, data acquisition, evaluation, calculation etc.
SUMMARY of the patent application DE19543289 modified processes with monolithic spectrometers Method and device for optic-dynamic surface-tension measurement on running substrate webs like : plastic film, laminated or coated film or paper webs which still show a measurable optical transmission in the wavelength range from 200 to 8000 nm, characterised in that the optically stationary or web width traversing and online working measuring device has two optic-channels (12/13), displaced by 90 to each other, which are used to subject the substrate web (2) running vertically through the measuring gap (31) to a light transmission with chromatic light having a moderately changeable wavelength range of 200 nm to 8000 nm and that, during the transmission, both beam feeders (12/13) are displaced (23) transversely (left and right) in relation the optical Y-axes (32/33) and in relation to the detectors (20) located on the other side of the substrate web and along their optical X-axes (27/28) so that the two Y-axes (32/33) are not aligned during the measuring event occurring simultaneously for both channels (12/13) and that the optical image distortion produced in this way generates transmissions integrals from which the relative value of the surface tension is derived.
Documents The patent document, significant diagrams, added literature etc. are published on our website http://www.microperforation.com.
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