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Fehrer develops needle arrangement scheme.

Fehrer Develops Needle Arrangement Scheme

Technical developments in the needlepunching industry have traditionally centered on improved, faster looms and more efficient needles. But early in 1991 machinery manufacturer Dr. Ernst Fehrer, Linz, Austria, introduced an improvement that is a combination of both of these aspects.

Building on the work it has been doing on the optimization of needle distribution, Fehrer has developed and applied for a patent for what it is calling the "Fehrer F9" needle arrangement. The new arrangement concept, according to the company, is the result of a "completely new approach" to needle utilization. Basically it was developed to offer mark-free needling and uniform penetration for high quality needlepunched products.

Perhaps the most interesting aspect of the F9 plan is the ability to use the same number of needles (approximately 10,000 per working width meter) in a single board machine as in a double board machine. This is the result of the increased density of the needles in the board. Fehrer, however, was not supplying details on the specifics of this new needle arrangement.

The reduced space requirements and the lower investment costs for production lines consisting of several needlepunching machines is another of the benefits. In fact, under the new design, single board machines can be used instead of double board machines and the number of machines in a nonwovens line can be reduced.

Among the other advantages being promoted by Fehrer:

*The uniform distribution of the penetrations, which provides an even surface texture.

*Optimum mark-free penetration quality is largely independent from the advance per stroke ration.

*High levels of dimensional stability are attained during needling. This means reduced draft and width shrinkage combined with increased tensile strength.

*The virtual elimination of needle markings, such as those from preneedling, by the use of the F9 arrangement in the finishing machines.

*The F9 is available with approximately 5000-10,000 needles a meter. Normal needles in standard dimensions are used, meaning that special needles are unnecessary.

Fehrer projects this new needle arrangement concept will be most suited for the production of automotive trim, smooth and structured floor and wall coverings, printed needle felts, substrates, imitation leather, filters and other technical products that demand a smooth surface. Fehrer reported that an NL2000/S high performance needle loom with a 2.4 meter working width has been fully equipped with the F9 distribution and is available for tests at its Linz facility.
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Title Annotation:Nonwovens Technology; Dr. Ernst Fehrer, Fehrer F9, nonwoven fabric industry technology
Publication:Nonwovens Industry
Date:Apr 1, 1991
Previous Article:Ergon Nonwovens, Lantor BV join in European joint venture.
Next Article:INDA-TEC '91.

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