Cleaning tablets or water-softening tablets and their...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 17/00 (2006.01) C11D 1/66 (2006.01)

Patent

CA 2532021

A method of making cleaning or water-softening tablets involves making a premix of cleaning or water-softening particulates and a lubricant, for example a sucrose ester or sorbitan ester; feeding the premix into a feed port of an extruder; feeding a binder, for example polyethylene glycol, into the extruder at or downstream of the feed port, the binder being a solid at room temperature but being mixed with the cleaning or water-softening particles as a liquid or becoming a liquid inside the extruder; and extruding the resulting mixture into strands which are separated into tablets.

Cette invention se rapporte à un procédé servant à fabriquer des pastilles de détergent ou d'adoucissant d'eau et qui consiste à cet effet à produire un mélange préalable de particules de détergent ou d'adoucissant d'eau et d'un lubrifiant, par exemple, un ester de sucrose ou un ester de sorbitan ; à introduire ce mélange au préalable dans l'orifice d'alimentation d'une extrudeuse ; à introduire un liant, par exemple du polyéthylène glycol dans l'extrudeuse au niveau ou en aval de l'orifice d'alimentation, se liant étant solide à température ambiante mais se mélangeant aux particules de détergent ou d'adoucissant d'eau sous forme de liquide ou devenant liquide à l'intérieur de l'extrudeuse ; et à extruder le mélange qui en résulte en rubans qui sont ensuite coupés en pastilles.

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