A SHIELD against contamination, waste
USTER Jossi Vision Shield gives spunlace producers the confidence and security to avoid quality issues and its technology can cope with both IR and UV light ranges reliably detecting various types of foreign matter.
USTER Jossi Vision Shield gives spunlace producers the confidence and security to avoid quality issues and its technology can cope with both IR and UV light ranges reliably detecting various types of foreign matter.
When textile products are intended for critical end-uses, there can be no compromises on quality. Nonwovens manufacturers, for example, must deliver the highest levels of quality when supplying fabrics for medical, personal care and hygiene applications. These products must both look and feel virtually perfect, to meet the expected standards for cleanliness and comfort, especially when they come into contact with human skin in use.
So, any contamination in these fabrics is a potentially disastrous quality risk, leading to claims and returned rejects. Zero tolerance levels for defect larger than 1 mm are standard. Tiny fragments of foreign matter in the fibre could remain visible as unsightly blemishes, as well as scratching or abrading the user’s skin.
Typically, fabrics for these sensitive applications are made by the spunlacing process, which starts with the fibre raw material in loose stock form. This is where it is crucial to remove any contaminants, before they reach the fabrication process. At the same time, the nonwovens producers must preserve as much valuable ‘good’ fibre as possible, minimizing waste to maintain plant efficiency and profitability.
Powerful technology
The USTER Jossi Vision Shield fibre cleaning system is the solution. It provides maximum detection of contaminants with minimal waste. Located in the ideal position, after fine opening in the blowroom, the system uses latest-technology spectroscopes to pinpoint even the smallest particles of foreign matter in the cotton or man-made fibre raw material.
Covering a much wider wavelength than conventional camera systems, USTER Jossi Vision Shield has the power to identify and remove fragments as fine as a single human hair. At this stage in the fibre preparation routine, detection is enhanced, since the fibre tufts have the optimum opening to prevent any small contaminants being hidden inside them.
Once identified, the foreign matter pieces are automatically ejected by the system, preventing contamination of the spunlaced fabric. Some waste here is inevitable, but USTER Jossi Vision Shield controls this by continuously measuring the speed at which the fibre tufts pass through. It then uses precision valves to time each ejection perfectly, so that only the unwanted contaminant is removed, with an absolute minimum of good fibre being lost. The cost savings for the producer can be significant.
Security against quality claims
The quality demands facing nonwovens manufacturers in these key applications are stringent. For example, it is clearly unacceptable to allow any kind of stray material in hospital products such as absorbent cotton, alcohol swabs, or surgical gauze. Claims and complaints would certainly have a serious impact on the producer’s reputation.
USTER® Jossi Vision Shield gives spunlace producers the confidence and security to avoid quality issues in this demanding marketplace. Its technology can cope with both IR and UV light ranges and it can reliably detect various types of foreign matter. All kind of synthetics and even the finest scraps of white polypropylene – otherwise difficult to pick out – are efficiently removed, using the USTER JOSSI MAGIC EYE in tandem with the USTER Jossi Vision Shield.
This technology combination empowers nonwovens producers to take control of contamination at the highest levels of quality and efficiency, making investment USTER Jossi Vision Shield a logical choice for fibre cleaning.
The Uster Group is the leading high-technology instrument manufacturer of products for quality measurement and certification for the textile industry.
The Group provides testing and monitoring instruments, systems and services that allow optimization of quality through each individual stage of textile production.
This includes raw textile fibres, such as cotton or wool, all staple fibre and filament yarns, as well as downstream services to the final finished fabric. The Uster Group provides benchmarks that are a basis for the trading of textile products at assured levels of quality across global markets.
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