Sefar Inc.
Tubes
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Fabrics, single and multilayer, can be heat-slit into tube configurations. Tubes are made by slitting two layers of fabric together with a heated knife, creating two flat seams at either side of the tube. Heat-slit fabric edges are melted or fused together to increase durability and to decrease fraying. The heat-slit seam has a limited strength and should be used as a transport seam only, e.g. for injection molding.
Heat-slit tubes
Fabrics, single and multilayer, can be heat-slit into tube configurations. Tubes are made by slitting two layers of fabric together with a heated knife, creating two flat seams at either side of the tube. Heat-slit fabric edges are melted or fused together to increase durability and to decrease fraying. The heat-slit seam has a limited strength and should be used as a transport seam only, e.g. for injection molding.
Product forms
All fabrics with thread diameters < 250 µm and mesh openings < 500 µm can be heat slit
Heat-slit tubes are specified by having a defined inner diameter. Diameters range from 6 to 320 mm
The inner diameter of the heat-slit tube does not equal the flat width of the tube itself. The effect of welded 'wings' on either side has to be taken into consideration. The width depends on the mesh type
Ultrasonic flat-welded tubes 2 – 168 mm for fabrics up to 500 µ
Making-up
Tubes are wound onto standard cores (polyester discs) which have an inner square hole of 30 x 30 mm and an outer diameter of 61 mm
Upon request tubes can also be rolled onto ABS rings with a inner diameter of 76 mm (3").
Depending on fabric type and tube dimensions, roll length of up to 500 m are possible.
Packaging / labeling
Tube rolls are packed into sealed PE bags
Heat-slit tubes made of SEFAR MEDIFAB fabrics are double bagged
The label contains the following information: manufacturer, material, dimensions (diameter in mm, length in m), manufacturing date, order number, roll number
Ultrasonically welded tubes
Fabrics, single and multilayer, can be ultrasonically welded into tube configurations. Tubes are made with one overlapping ultrasonic weld. Welds are accurate, clean and are made without the introduction of secondary material to the weld.
Product forms
All fabrics having thread diameters < 250 µm and mesh openings < 500 µm can be ultrasonically welded
Tube diameters range from 2 to 250 mm
Making-up
Tubes are wound onto standard cores
Polyester discs have an inner square hole 30 x 30 mm and an outer diameter of 61 mm
Depending on fabric type and tube dimensions, roll length of up to 700 m are possible
Packaging / labeling
Tube rolls are packed into PE bags that are closed by welding
The label contains the following information: manufacturer, material, dimensions (diameter in mm, length in m), manufacturing date, order number, roll number
Tubes, cut to length
Tubes, cut to length, are segments cut from woven, ultrasonically welded or heat-slit tubes.
Product forms
Laser cutting provides heat-sealed, non-fraying edges. Tube diameters range from 2 to 80 mm, lengths range from 10 to 500 mm.
Cold cutting provides non-sealed edges that may fray. Diameters range from 80 mm to 125 mm, lengths range from 10 to 1000 mm.
Packaging / labeling
Tube segments are packed into PE bags that are sealed by welding.
Tube segments made of SEFAR MEDIFAB fabrics are double bagged.
The label contains the following information: manufacturer, material, dimensions (diameter in mm, length in m), manufacturing date, order number, roll number, number of pieces per bag.
Your Benefits
Non-fraying edges (laser cut)
Customizable dimensions (variety of diameters)
Suited for healthcare applications (SEFAR MEDIFAB, double bag)
Traceability (label)
Easy handling (various cores available)