Patent ID: 8157127

Claim:
A method of draining a flexible container holding a viscous product, comprising: selecting a viscous product having a viscosity of at least 50 Pa·s, from the group consisting of silicone oils, silicone gums, polyorganosiloxane compositions which are crosslinkable to form elastomers by polyaddition, polycondensation or dehydro(poly)condensation reactions, organic polymers comprising reactive organosilicic groups and compositions which are charged in a solvent or aqueous medium, comprise an acrylic polymer and are crosslinkable to form elastomers by drying; said method further comprising: using a flexible container of the big-bag type having a capacity between 500 and 2,000 liters and consisting of a fabric bag made of polypropylene lined with a thin multilayered bag of polyethylene/aluminum/polyethylene terephthalate adhesively bonded and/or stitched to the fabric; ensuring that at least one outlet opening, allows the viscous product to flow out of the container; exerting a pressure on at least one delimited region of the flexible container with the aid of a pressurization device to keep the container in the inflated or partially inflated state and to accelerate the flow; depressurizing at the end of draining.