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Natural and synthetic yarns, fibers, spuns, monofilaments and cutflock specialities from the reliable source Swicofil 
Spunbonding Markets and Products

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Textile Specialities

Nonwoven and Fiberfill Markets 
Non Woven  Bonding Fiber  Geotextiles
Felting Felting   
Fillers  PP Fibers Filler   

Spunlace Meets Spunbonding

bitumen carrier web formation

Fleissner finishing lines shown here
are used to process bitumen carrier
webs made of polyester spunbond.

The nonwovens and technical textiles industries have worked with proven bonding and finishing methods for a long time. Lately, there has been considerable movement in the spunbond market.

Today’s spunbond market is dominated mainly by calendared spunbonds for the hygiene sector and mechanically needled spunbonds for geotextiles and roofing applications.

In the future, however, new bonding methods such as AquaJet spunlace technology from Germany-based Fleissner GmbH will be used more and more for the production of new generations of spunbonds. Fleissner, a leading supplier of spunlace and finishing equipment for spunbond webs, cooperates with spunbond machinery producers such as Reifenhäuser GmbH & Co. KG Maschinenfabrik, Germany.

Both the spunlace technology and the spunbond process already have maximum growth rates today. Spunlaced nonwovens — mainly carded staple-fiber webs — already have replaced and superceded many other nonwoven products that were produced by other bonding methods. This explains the strong, dominating position spunlace technology has in the market today.

The market trend of the last few years for the spunbond sector worldwide shows considerable growth that will increase even more because of new bonding methods such as spunlacing.

The requirements made on spunbond products influence the choice of bonding and finishing processes used in creating them. It is not important whether polypropylene (PP), polyester, other homopolymers or bicomponent fibers are used.

Based on experience with more than 1,000 continuous finishing lines for spunbonds, carded webs, wetlaid webs and airlaid webs, Fleissner can design and deliver finishing lines that meet requirements made on the final products.

Proven spunbond products and technologies include: lightweight webs for the hygiene and agricultural sectors; lightweight to medium webs used as sarking membranes for the building sector; heavyweight webs for geotextiles; medium weight webs for roofing membranes; and medium weight webs for primary backings on tufted carpets.


New Concepts

Often, lightweight webs that have been calendared do not offer the desired softness for applications in the hygiene sector. Subsequent treatment on an AquaJet spunlace line increases the softness and improves the volume. This can be achieved at processing speeds of up to 600 meters per minute (m/min). The spunlace line can be installed both in-line with the spunbond machine and off-line.

The speed and efficiency of the production process for heavy webs for geotextiles so far have been limited by the relatively low speed of the mechanical needling process, as higher speeds would destroy the endless filaments, causing a reduction of strength.

Bonding using spunlace technology makes it possible to operate the line at higher production speeds, which increases line efficiency. At the same time, the tensile strength of the goods is improved. Thus, fiber costs can be reduced by the reduction in web weights, which considerably increases the economic efficiency of the process.

three-layered web structures

Fleissner’s AquaJet spunlace system
may be used to make three-layered
web structures, such as the one above
with cellulose fibers in the middle layer.

Production of wet wipes as three-layered composites by bonding PP spunbond layers on the outside and an airlaid pulp layer on the inside results in two advantages: drastic improvement of water absorbency because of the cellulose fibers; and high cost savings because the use of more than 50-percent pulp allows the raw material to be greatly reduced. Line speeds of 400 m/min to 600 m/min are possible.

When producing spunbond filaments from splittable conjugate fiber cross-sections, AquaJet spunlace technology causes fibrillation of the fibers so that very fine filaments of less than 0.01 denier may be obtained. The nonwovens thus produced — for example, Evolon® by Freudenberg Nonwovens Group, Germany — are used for wipes with special properties because of the large fiber surface. Nonwovens for garments and coating substrates such as artificial leather also are increasingly being produced.



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