| 主权项 |
1. An active element with getter system comprising a cavity, at least one deposit of getter material comprising a getter capable of absorbing moisture, and a layer of hydrophilic transparent material for transport of moisture, wherein the layer of hydrophilic transparent material is arranged completely within the cavity and in contact with at least one of the deposits comprising a getter capable of absorbing moisture, wherein the active element is not in direct contact with the getter material or with the layer of hydrophilic transparent material, wherein the getter material has a higher capacity for water than the hydrophilic transparent material configured such that moisture would be transferred from the hydrophilic transparent material to the getter material, and wherein the layer of hydrophilic transparent material comprises a material selected from the group consisting of:
a) polyacrylates, polymethacrylates, polyetherimides (PEI), polyamides (PA), cellulose acetate (CA), cellulose triacetate (TCA), polysiloxanes, polyvinyl alcohol (PVAL), polyethylene oxide (PEO), polyethylene glycol (PEG), polypropylene glycol (PPG), polyvinyl acetate (PVAC), polyoxymethylene (POM), poly(ethylene vinyl alcohol) copolymers (EVAL, EVOH), poly(amid-ethylene oxide) copolymers (PA-PEO), poly(urethane-ethylene oxide) copolymers (PUR-PEO), and poly(ethylene-vinyl acetate) copolymers (EVA, EVAC); b) hydrophobic polymers selected from polyethylene (PE), polypropylene (PP), polycarbonate (PC), polymethylmethacrylate (PMMA), polystyrene (PS), polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), and polyimides (PI), wherein the hydrophobic polymer has undergone surface treatment to make it hydrophilic; and c) nano-sized oxides. |
