Pulsation dampener with gas retention

A dispensing system, comprising:

• a dispenser configured to dispense a liquid;
• a reservoir configured to store the liquid;
• one or more pumps configured to circulate the liquid between the reservoir and the dispenser;
• and
• a pulsation dampener configured to dampen pulsations in the liquid as the liquid passes through the pulsation dampener,
• wherein the pulsation dampener comprises:
• a housing;
• a diaphragm comprising at least one fluoropolymer layer, the diaphragm dividing the housing into a first compartment and a second compartment;
• an inlet port and an outlet port each in fluid communication with the first compartment thereby providing a flow path for the liquid to enter the first compartment via the first inlet port and exit the first compartment via the outlet port;
• and
• at least one gas disposed within the second compartment, the at least one gas being selected from the group consisting of xenon, sulfur hexafluoride, and mixtures thereof,
• wherein the fluoropolymer of the at least one fluoropolymer layer is selected from the group consisting of polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), and ethylene tetrafluoroethylene (ETFE),
• wherein the diaphragm has a thickness of 10 μm to 500 μm, and
• wherein the fluoropolymer of the at least one fluoropolymer layer, the at least one gas, and the thickness of the diaphragm are selected such that a gas transmittance rate of the at least one gas through the diaphragm is from 0 mbar*L/second to 1*10−5 mbar*L/second.

A method of making an article, comprising:

• pumping a formable liquid to a dispenser;
• dampening pulsations in the formable liquid via a pulsation dampener, the pulsation dampener comprising:
• a housing;
• a diaphragm comprising at least one fluoropolymer layer, the diaphragm dividing the housing into a first compartment and a second compartment;
• an inlet port and an outlet port each in fluid communication with the first compartment thereby providing a flow path for the formable liquid to enter the first compartment via the first inlet port and exit the first compartment via the outlet port;
• and
• at least one gas disposed within the second compartment, the at least one gas being selected from the group consisting of xenon, sulfur hexafluoride, and mixtures thereof,
• wherein the fluoropolymer of the at least one fluoropolymer layer is selected from the group consisting of polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), and ethylene tetrafluoroethylene (ETFE),
• wherein the diaphragm has a thickness of 10 μm to 500 μm, and
• wherein the fluoropolymer of the at least one fluoropolymer layer, the at least one gas, and the thickness of the diaphragm are selected such that a gas transmittance rate of the at least one gas through the diaphragm is from 0 mbar*L/second to 1*10−5 mbar*L/second;
• dispensing a portion of the formable liquid onto a substrate;
• forming a pattern or a layer of the dispensed formable liquid on the substrate;
• and
• processing the formed pattern or layer to make the article.