Peristaltic Pump Tube
AssigneeGambro Lundia AB
InventorsFrancesca Galavotti, Carlo Giannella
Life of this patent
Estimating the term…
Abstract
A tube for a peristaltic pump comprises an elastically deformable tubular body (2) made from a PVC composition containing: 100 phr of a PVC resin having a K value, measured according to standard ISO 1628-2, of not less than 85, from 40 to 100 phr of DEHA plasticizer, from 0.05 to 1.0 phr of lubricant, from 0.3 to 15.0 phr of stabilizer and co-stabilizer. The deformable tube, which is usefully employed for liquid transport in a dialysis apparatus, enables a high level of fluid transport efficiency to be maintained, even after many hours of peristaltic pump operation.
Claims21
1-20. (canceled)
A tube for a peristaltic pump, comprising an elastically deformable tubular body, made of a material containing at least a vinyl chloride resin and at least a plasticizer, wherein said resin has a K value of not less than 85 measured according to standard ISO 1628-2.
A use of a material for manufacturing a deformable tube to be used coupled with a peristaltic pump for fluid transport, which material reduces a drop in fluid flow rate following tube wear, said material containing at least a vinyl chloride resin and at least a plasticizer, wherein said resin has a K value of not less than 85 measured according to standard ISO 1628-2.
A use of a material containing:
- 100 phr of at least one vinyl chloride resin having a K value, measured in accordance with standard ISO 1628-2, of not less than 85;
- and
- a quantity of less than 100 phr of at least a plasticizer comprising a derivative of adipic acid;
- for manufacturing a deformable tube to be used coupled with a peristaltic pump for fluid transport, for limiting a drop of fluid flow rate of the peristaltic pump following wearing of the tube.
A process for manufacturing a deformable tube by extrusion, comprising stages of:
- preparing a blend containing 100 phr of a vinyl chloride resin, and between 40 and 100 phr of at least a plasticizer, said resin having a K value, measured according to standard ISO 1628-2, of not less than 85;
- heating the blend to a temperature comprised between 120° C. and 150° C.;
- extruding the deformable tube from said blend at a temperature comprised between 160° C. and 180° C.
Dependencies are inferred from the claim text.