GKD – Gebr. Kufferath @ Index20: Polymer filt...
GKD – Gebr. Kufferath @ Index20

Polymer filtration and forming, drying and bonding of nonwovens

Thanks to the special topography of its belt surface, the new Conductive 2215 process belt fabric guarantees precise deposit without fiber entanglement or fiber loss during nonwovens forming with airlay and meltblown processes (Source: GKD)
Thanks to the special topography of its belt surface, the new Conductive 2215 process belt fabric guarantees precise deposit without fiber entanglement or fiber loss during nonwovens forming with airlay and meltblown processes (Source: GKD)

At the Index, GKD – Gebr. Kufferath AG, Düren/Germany, will once again be presenting its integrative expertise for forming, drying, and bonding of nonwovens, as well as polymer filtration at the Index in Geneva/Switzerland from October 19-22, 2021. The focus will be on new products for meltblown, airlay, and spunbond nonwoven forming. Further development of the glass hybrid fabric belts, which have been proven in exacting thermal bonding processes will be presented. Tailor-made metal fabric filter media for central filters and spinning beams, as well as blower screens for polymer filtration will also be showcased.
Airlay and meltblown: Belt surface with special topography
The new Conductive 2215 process belt fabric for nonwovens forming is characterized by a cross twill weave produced from special polyester filaments. The sophisticated combination of material selection, filament diameter, weave technology, and air permeability leads to an optimum fabric surface topography for precise nonwovens deposit. The belt therefore guarantees both a homogeneous deposit on the belt surface and good extraction. At the same time, it prevents fiber entanglement and fiber loss. These properties offer a key increase in process efficiency, particularly when processing short-fiber, bleached cotton with airlay forming. Carbon-coated filaments in the fabric also securely discharge the electrostatic charge that occurs during forming processes.
Spunbond nonwovens forming: Metallic dissipation without product contact
With Conducto 7690, GKD will be presenting a fabric design comprising polyester monofilaments and metallic multi-filaments. The metal fibers that are woven into the back of the belt do not come into contact with the product. This fabric type is therefore also ideal for risk-free production of demanding medical or hygiene products. At the same time, the robust yet flexible yarn produced from stainless steel fibers also guarantees up to 10 times greater dissipation of electrostatic charge than conventional belts. Homogeneous web formation, a high degree of grip, and good nonwoven removal also underline the process reliability offered by this type of forming belt.

Converting: Spiral belts for seamless processes
With the spiral belts it produces in-house, GKD offers a high-performance solution for applications that require a seamless belt. Designed specifically for each customer, they represent an attractive alternative – e.g. for the very wide or high-speed systems used in the hygiene nonwovens sector. With usage-optimized air permeability rates, as well as both tracking stability and dimensional stability, these field-proven belts guarantee reliable converting processes.
Thermobonding: Glass hybrid fabric with non-stick coating
Glass hybrid fabric belts from GKD are used in thermal bonding of highly voluminous or heavily compressed products in double-belt ovens. Very good cross stability and full PFA coating qualify them for highly adhesive products, as well as for systems with large working widths or products with strong shrinking forces. As a single-ply fabric design with stainless steel wires in the weft direction and warp wires made from fiberglass strands, they are energy-efficient lightweights – available in both magnetic and non-magnetic form. The non-stick coating of wires, strands, and intersections minimizes the cleaning intervals and thereby contributes to a significant increase in production speeds. At the Index a new, strengthened fabric design that further increases cross stability will be presented. This also further improves continuous directional stability and thereby the service life.
Polymer filtration: Long service life thanks to metal fabric designs
Filter discs or cartridges, produced from up to 6 layers of metal fabric, help ensure a long screen changer service life. The process-based fabric design guarantees a high dirt holding capacity, fine filtration rates, and a low clogging tendency. Long filters or discs produced from layers of fabric matched specifically to the individual application optimize filtration of the fusion flow in spinning beams. At the same time, they help significantly extend the service life of the spinnerets. Large-format honeycomb supporting plates, which employ a specially enhanced fabric design on both sides, are a proven solution for blower screens. The homogeneous stream they produce secures an even fiber flow.

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