Founded in 1969, Stamperia Olonia is now an integral part of the Liberty Group and has been a leader in printing on natural fabrics for home textiles and clothing fabrics from the very beginning. New technologies, high quality, innovation and certifications are Olonia's ingredients for further growth.
This is why the printing specialist has also equipped several stenter frames and printing lines with systems from Mahlo. This helps to produce a high and continuously consistent quality. At the same time, Olonia saves costs and resources and can document and improve its processes.
Images courtesy of Stamperia Olonia, Italy
On an production line, an Orthopac RVMC-15 controls the distortions at the infeed. (Olonia / Italy)
An MMA-15 drive station above the straightening machine provides support when feeding into the system. (Olonia / Italy)
Here is the scanning unit of the Orthopac RVMC-15 in detail. The scanning heads are automatically moved to the fabric width. (Olonia / Italy)
Flat bed printing & Rotary printing
Stamperia Pezzoli offers printing and finishing services for textiles for more than 35 years, maintaining the highest quality standards in every step of the manufacturing process and ensuring a highly competitive service in terms of technology and styling. Stamperia Pezzoli's finished textiles are used worldwide mainly for furniture and linen in households, hotels and hospitals. They are also used in the shipping industry and in the outdoor sector.
Pezzoli relies on Mahlo technology for straight-thread fabrics as well as process control and quality control during the finishing processes on the stenter frame. In the installation shown, a combination of Orthopac weft straighteners at the inlet and outlet of the stenter frame ensures perfect straightening results. For the best printing results, the Patcontrol system also monitors the pattern repeat and pattern distortion. The parameters in the stenter frame - dwell time, exhaust air moisture, residual moisture, fabric width - are monitored by the Optipac process control system.
Images courtesy of Stamperia Pezzoli, Italy
Stenter frame with Orthopac weft straightener at the inlet and outlet. A Patcontrol PCS also scans pattern distortions. The Optipac process control controls the dwell time, exhaust air and residual moisture. (Pezzoli / Italy)
A Patcontrol PCS scans for pattern distortions at the inlet and sends control commands to the weft straightener. (Pezzoli / Italy)
At the inlet, the Orthopac RVMC automatic weft straightener supplies the stenter frame with straight fabric. (Pezzoli / Italy)
The Ortopac RVMC uses skew rollers and bow rollers to correct skew and bow distortions in the fabric. (Pezzoli / Italy)
Exhaust air humidity sensors in the Optipac VMC measure and control the exhaust air humidity in the stenter frame. Excess moisture escapes, leaving the energy required for drying or fixing. (Pezzoli / Italy)
Hidden in the stenter frame, Optipac VMC sensors measure the surface temperature of the fabric and control the dwell time / fixing time. (Pezzoli / Italy)
Sensors at the stenter frame outlet measure the residual moisture of the fabric and adjust the system if the value is too high or too low. (Pezzoli / Italy)
The Wilot WMR width measuring system from Mahlo records the fabric width as it passes through the stenter frame. (Pezzoli / Italy)
An Orthopac FMC logs the residual distortion values at the outlet of the stenter frame and sends control pulses to the straightening machine in the infeed if necessary.
The pattern distortion at the stenter frame outlet is also logged with the Patcontrol PCS and, if necessary, control pulses are sent to the straightening machine in the infeed. (Pezzoli / Italy)
The residual moisture content is determined by the electrical conductivity of the fabric.
Residual moisture: Textometer RMS
The useful increase of the residual moisture of the product from 4-8% prevents overdrying and results in:
- Increased productivity speed by 10%
- Drop of production costs per running metre by 11%
- Drop of energy consumption by 4%
ROI calculator residual moisture measurement
Test with your own values
Enter the values for your goods in the column "Without residual moisture control".
All values except residual moisture are automatically transferred to the column "With residual moisture control" and cannot be changed there (as they remain the same).
You can only change the value of the residual moisture. With control, a higher residual moisture is possible that corresponds exactly to the setpoint in the final state.
Find out how much you save if you can produce your goods with a higher or exactly the right residual moisture.
Usual values range between 6 and 10%.
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Send your calculations to our experts and start saving money!
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Textometer RMS
Control of residual moisture
The residual moisture content is determined by the electrical conductivity of the fabric.
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Measuring electrical conductivity
Moisture retention (residual moisture) is an important criterion in terms of later finishing, finished product scrap and energy optimizing. Electrodes determine the residual moisture at the outlet of the dryer utilising electrical conductivity measurement.
The dryer speed is automatically adjusted until the desired degree of drying has been reached. Many different electrodes are available for a wide variety of applications.
Product Highlights
- Measurement of even low percentages of residual moisture
- Excellent repeatability
- Maintenance and trouble-free
Customer benefits
- Higher productivity and better quality
- Optimal residual moisture for further processing
- Optimal use of drying capacity
One of the most important criteria in drying processes is the product moisture. The correct residual moisture of the product determines the economical factor in each drying procedure as well as the quality of the product and/or later finishing to a great extent.
Overdrying of the textile usually has a very negative effect on product appearance and feel. Residual moisture below the hygroscopic moisture balance results in weight loss and thus lower profits. If the textile is overdried in the stenter the drier speed drops significantly: an enormous reduction of the dryer capacity.
- Textile finishing
- Stenter frame
