Detergent composition and laundry washing method using a...

C - Chemistry – Metallurgy – 11 – D

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C11D 11/00 (2006.01) C11D 3/386 (2006.01) C11D 3/39 (2006.01)

Patent

CA 2376526

A chemical cleaning system for a multi-tank or a single-tank laundry washing machine, having at least two separate components for aqueous dissolution or dilution to respective use concentrations, a first component comprising a proteolytic enzyme, and a second component comprising an imidoperoxycarboxylic acid, particularly phthaloylaminoperoxycaproic acid (PAP), wherein the first component is introduced into a prewash zone or step, and the second component is introduced into a main wash zone or step. When using this system, it was found that effective cleaning could be obtained even at relatively low main wash temperatures of 45-55 °C. As a result, much less energy was needed and a considerable reduction of textile damage was observed as compared with cleaning systems of the prior art.

L'invention concerne un système de nettoyage chimique destiné à une machine à laver le linge à réservoirs multiples ou à réservoir unique utilisant au moins deux composants séparés destinés à être dissous ou dilués dans l'eau à des concentrations d'utilisation respectives, un premier composant comprenant une enzyme protéolytique et un second composant comprenant un acide imidoperoxycarboxylique, notamment l'acide phtalylaminoperoxycaproïque (PAP). On introduit le premier composant dans une zone ou une étape de prélavage et le second composant dans une zone ou une étape de lavage. En utilisant ce système, on découvert qu'on pouvait obtenir un nettoyage efficace y compris à des températures de lavage relativement basses comprises entre 45 et 55 DEG C. Le lavage exigeait ainsi beaucoup moins d'énergie et une réduction considérable du nombre de détériorations du textile a été observé en comparaison avec les systèmes de nettoyage de la technique antérieure.

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