Abstract: A battery module includes a first housing portion and a second housing portion defining a sealed volume. A plurality of electrochemical cells is provided in the volume, each of the plurality of electrochemical cells including a respective vent to enable a release of a gas into the volume when an internal pressure of the respective electrochemical cell reaches a threshold. A ventilation vent is coupled with the housing and in fluid communication with the volume. A burst vent is coupled with the housing and in fluid communication with the volume, the burst vent including a valve having a first valve portion and a second valve portion. The first and second valve portions enable a staged release of vented gases through the burst vent based on incremented thresholds.

Abstract: Perfluorinated cycloalkane solvents for dissolving high melting polymers containing tetrafluoroethylene, are disclosed. These solvents dissolve such polymers more rapidly, and/or are more stable, than previously known solvents. Also disclosed is a process for dissolution of the polymers and their resulting solutions. The solutions are useful for making polymer films, coatings and for encapsulating objects.

Abstract: Perfluorinated cycloalkane solvents for dissolving high melting polymers containing tetrafluoroethylene, are disclosed. These solvents dissolve such polymers more rapidly, and/or are more stable, than previously known solvents. Also disclosed is a process for dissolution of the polymers and their resulting solutions. The solutions are useful for making polymer films, coatings and for encapsulating objects.

Abstract: A process for purifying fluoropolymers by contacting them at temperatures above 140.degree. C. with a liquid perfluorinated cycloalkane. The resulting polymers are particularly useful where polymers with reduced impurities are desirable, such as in medical devices and in parts for the semiconductor manufacturing industry. The liquid perfluorinated cycloalkanes improve the adhesion of fluoropolymer to themselves and other materials.

Abstract: In the suspension polymerization of tetrafluoroethylene to make granular polymers, presence of a selected salt of a perfluorinated nonanoate enhances desirable properties of the product and the process.

Abstract: Tetrafluoroethylene polymer coating dispersions when coated on glass fabric improve flex life of the fabric if the dispersions contain a selected silane, siloxane, water repellant, and polyethylene oxide surfactant of the formula C.sub.9 F.sub.17 O(CH.sub.2 CH.sub.2 O).sub.5 CH.sub.3.

Abstract: A sidestream of injection liquid taken downstream of a filter is passed through a monitoring filter of appropriate pore size. Pressure drop over the monitoring filter is determined and a regeneration cycle for the main filter is triggered in response to differential pressure (.DELTA.P) over a preset value, which corresponds to deterioration in filtrate quality.