Processing in a Class 10 000 clean room and continuous product testing ensure highest quality standards:
Clean room
To meet special cleanliness requirements, many advanced manufacturing processes are located in Sefar's clean rooms.
Special handling, packaging, inspection and documentation services ensure the hghest standards in product quality and consistency.
Heat slitting
Heated knives are used to produce fabric strips for many applications - from high volume injection molding to diagnostic test strips. Heat-slit mesh edges are melted or fused to increase durability and minimize fraying.
Ultrasonic slitting
Ultrasonic slitting is also used for manufacturing fabric strips and produces a closed edge with very little material build up at the edge.
Laser cutting
Laser cutting is used to produce highly precise fabric parts with a heat sealed edge. Fusing the fibres along the edges removes all loose filaments.
Ultrasonic stamping
Ultrasonic stamping is often used for highly precise fabric parts because it ensures tight geometric tolerances for fabrics with mesh openings < 400 microns. Ultrasonically sealed edges are non fraying and have no edge build-up.
Ultrasonic welding
Ultrasonic welds are accurate, clean and made without introduction of secondary materials to the weld area. Precision sleeves and bags for blood filtration are examples of applications that take advantage of this technology.
Pleating
A highly effective way of increasing the filter surface is to pleat the filter itself. To form a pleated element fabrics are welded and then pleated together and cut to a defined number of pleats. Single and multilayers pleated elements, up to four layers, are possible.
Quality control in the clean room
Depending on the fabrication process filter components fabricated in the clean room are continuously monitored with different testing equipment:
Laser scanning device for controlling ribbon widths.
Tube control device with test mandrils to measure tube diameter.
Electronical control device to check
dimensional accuracy of two-dimensional fabric parts.
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