Drying substances, preparation and use thereof
AssigneeOridion Medical 1987 Ltd.
InventorsAmos Ophir, Eyal Cohen, David Dishon, Joshua Lewis Colman
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Abstract
There is provided herein a dryer polymer substance comprising a polymer grafted with a compound having sulfonic groups, wherein the substance is adapted to pervaporate a fluid such as water, water vapor or both. There is further provided a process for the preparation of a dryer polymer substance adapted to pervaporate a fluid, the process includes processing a polymer into a desired form, activating at least a portion of the polymer, and grafting the activated portion of the polymer with a compound having groups adapted to be sulfonated.
Claims16
A dryer polymer substance comprising a non-porous copolymer grafted with a compound having sulfonic group, said copolymer comprising poly(vinylidene fluoride hexafluoropropylene)-graft-poly(styrene sulfonated acid) (P(VDF-HFP)-g-PSSA) or any derivative thereof, wherein said dryer polymer substance comprises a dryer tube, wherein the percentage of grafting is in a range of 20-50%, wherein the substance is adapted to pervaporate water, water vapor or both from a gas while maintaining the concentration of CO2, O2 or both in said gas, and wherein the tube has a water evaporation rate of over 150 micro-liter/hour at a temperature of 22° C. and at 34% humidity, when the internal diameter of the tube is 1.0±0.1 millimeter (mm);
- the outer diameter of the tube is 1.24±0.02 mm and the length of the tube is 50 mm.
A breath sampling system comprising:
- A dryer polymer tube comprising a non-porous polymer grafted with a compound having sulfonic groups, said polymer comprising poly(vinylidene fluoride hexafluoropropylene)-graft-poly(styrene sulfonated acid)(P(VDF-HFP)-g-PSSA) or any derivative thereof, wherein the percentage of grafting is in a range of 20-50%, wherein the tube is adapted to pervaporate water, water vapor or both from a gas while maintaining the concentration of CO2, O2 or both in said gas, and wherein the tube has a water evaporation rate of over 150 micro-liter/hour at a temperature of 22° C. and at 34% humidity, when the internal diameter of the tube is 1.0±0.1 millimeter (mm);
- the outer diameter of the tube is 1.24±0.02 mm and the length of the tube is 50 mm;
- and least of:
- a connector adapted to connect said dryer polymer tube to a breath sampling tube;
- and
- a reinforcement element.
Dependencies are inferred from the claim text.