Abstract: The invention relates to a separator film for a device used for storing electrical energy, the film being porous and oriented, and being obtained by stretching in a longitudinal direction and in a direction transverse to the longitudinal direction, the film containing a mixture comprising a polypropylene homopolymer, at least 10% of a copolymer obtained from monomers comprising at least propylene and ethylene, and at least one beta-nucleating agent. According to the invention, the ethylene content of the copolymer is ?1% but <10% and a propylene content of the copolymer is ?90% for a film thickness of ?8 microns and ?30 microns, corresponding to a specified space factor according to the IEC-60674-3-1 standard greater than or equal to 145% and a density of the biaxially stretched film greater than or equal to 0.18 g/cm3 but less than or equal to 0.41 g/cm3.

Abstract: A film comprising a core layer (5), first and second outer layers (3, 4), first and second intermediate layers (1, 2). The core layer (5) contains at least 50% by weight of a ULDPE. At least one of the outer layers (3, 4) contains at least 50% by weight of a LLDPE. The first and/or second intermediate layer (1, 2) is made of a first composition based on EVA and on a copolymer of ethylene and of at least one compound selected from the group consisting of the linear alkenes of order C greater than ethylene, dienes and cyclic alkenes.

Abstract: The invention relates to a separator film for a device used for storing electrical energy, the film being porous and oriented, and being obtained by stretching in a longitudinal direction and in a direction transverse to the longitudinal direction, the film containing a mixture comprising a polypropylene homopolymer, at least 10% of a copolymer obtained from monomers comprising at least propylene and ethylene, and at least one beta-nucleating agent. According to the invention, the ethylene content of the copolymer is ?1% but <10% and a propylene content of the copolymer is ?90% for a film thickness of ?8 microns and ?30 microns, corresponding to a specified space factor according to the IEC-60674-3-1 standard greater than or equal to 145% and a density of the biaxially stretched film greater than or equal to 0.18 g/cm3 but less than or equal to 0.41 g/cm3.

Abstract: The invention relates to a barrier film made up of five stacked layers comprising: a central barrier layer comprising a first blend of EVOH and of PA, two outer layers comprising a second blend, and two adhesive layers between the central layer and the two outer layers, wherein the second blend only contains a first copolymer of ethylene and of an a-olefin having a density less than or equal to 0.925 g/cm3 and greater than or equal to 0.915 g/cm3 and a second metallocene copolymer of ethylene and of an a-olefin having a density less than or equal to 0.910 g/cm3.

Abstract: A film comprising a core layer (5), first and second outer layers (3, 4), first and second intermediate layers (1, 2). The core layer (5) contains at least 50% by weight of a ULDPE. At least one of the outer layers (3, 4) contains at least 50% by weight of a LLDPE. The first and/or second intermediate layer (1, 2) is made of a first composition based on EVA and on a copolymer of ethylene and of at least one compound selected from the group consisting of the linear alkenes of order C greater than ethylene, dienes and cyclic alkenes.

Abstract: A porous composite product in the form of a film with a high specific surface. Used in a wide range of electrochemical products especially in the field of selective membranes, packaging or catalysis. The porous composite product has a high homogeneity in the distribution of the filler and a continuous structure. The product is capable of being obtained by extrusion.

Abstract: A porous composite product in the form of a film with a high specific surface. Used in a wide range of electromechanical products especially in the field of selective membranes, packaging or catalysis. The porous composite product has a high homogeneity in the distribution of the filler and continuous structure. The product is capable of being obtained by extrusion.

Abstract: A process for the preparation of a porous composite product. The process steps are forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers, in particular with a high specific surface; extruding the mixture to form an extruded precursor product; removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores, and recovering the porous composite product.

Abstract: The invention concerns a high power capacitor ideally polarizable consisting of a positive electrode (2) and its current collector (4), a negative electrode (3) and its current collector (5), said electrodes comprising a carbon containing material with high specific surface area, a separator (6) and a non-aqueous liquid electrolyte impregnating said separator and said electrodes. The invention is characterised in that the non-aqueous liquid electrolyte is an organic solution of a sodium or potassium or alkalin-earth metal salt, on their own or mixed in a solvent containing an acid.

Abstract: The present invention relates to a reconstituted tobacco leaf coated with a stripe of adhesive along one of its margins, the linear mass of the stripe of adhesive being greater than 70 mg/m in the dry state. The invention also provides a method of depositing such a stripe, and apparatus for depositing such a stripe of adhesive.