Uster @ Index20: Nonwovens quality control
Uster @ Index20

Nonwovens quality control

Automated contamination removal for nonwovens with Uster Jossi Vision Shield N (source: Uster)
Automated contamination removal for nonwovens with Uster Jossi Vision Shield N (source: Uster)

Edana and INDA, the leading global nonwovens associations, recently issued the 2021 edition of their ‘Standard Procedures’ guidance for nonwovens and related industries. These authoritative documents aim to define, in technical terms, relevant products – including 107 individual test regimes.
Nonwovens cannot really be better than the fibers they are made of. However, there is a real threat to the quality of nonwovens caused by contamination. Fiber cleaning is the solution and bundle size is the key detail: small contaminant particles can hide inside bigger bundles, making them especially difficult to locate when the material is more compressed. Uster Jossi Vision Shield N by Uster Technologies AG, Uster/Switzerland, is ideally positioned in the line to overcome this, directly behind the fine opener. This ensures that the fiber bundles pass the spectroscopes in their most open state. Installation is easy, since the fiber cleaner’s slim design fits very good into existing lines – and readily copes with the high output of standard production lines. For best detection results, the fiber cleaner is tuned to identify the typical contamination types in nonwovens, including colored fibers.

In Europe last year, medical applications recorded an increase in demand of 118% and wipes personal care plus 22%. These are the top 2 growing segments according to the international association serving the nonwovens and related industries, Edana, Brussels/Belgium, – and they are also the ones showing a trend towards zero tolerance levels for defects larger than 1 mm. The built-in spectroscopes of Uster Jossi Vision Shield N operate on a much greater wavelength range. This enables detection of contamination within the ‘invisible’ range of infrared and ultraviolet light, and even contamination fragments of the same or similar shade as the fibers themselves – down to the fineness of a human hair.
A further exhibit at the Index from October 19-22, 2021 in Geneva/Switzerland is the EVS Fabriq Vision N, a nonwovens quality assurance system which ensures a consistently high rate of fault detection using automated inspection during the production process. The Uster nonwovens systems lead to total fabric quality assurance by using automated control during intermediate inspection. Uster EVS Fabriq Vision N locates any visible faults objectively and consistently. Defects in every roll are located and recorded in a defect map, at full line running speeds. It enables seamless integration of an inspection system into any production process – and into nonwovens manufacturing lines – detecting contamination, holes, irregularities and any other defect. Installation is simple and flexible: a fixture bar bridges the full width of the process line, holding as many spectroscopes as required for the application.

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