Method for cleaning thermoplastic material and alkaline composition for the cleaning thereof
OwnerJean-Yves Lalle, Marie-Jeanne Lalleinventors
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Abstract
An alkaline cleaning composition and a method which can be used to clean all types of flexible woven or unwoven, laminated or non-laminated thermoplastic films or thermoplastic material. The method is characterized in that it includes at least one washing step in an alkaline medium in a bath in the presence of an alkaline washing composition including at least 5-8% soda, 3-12% carbonated soda, 10-28% sodium perborate and 0-10% surfactant(s), whereby the step is performed at a sufficiently low temperature in order to avoid any shrinkage or deformation of the above-mentioned film or material.
Claims17
A process for cleaning laminated or nonlaminated, woven or nonwoven, thermoplastic material or flexible thermoplastic film, in the form of bags for the transportation of food, chemical or cosmetic products, which comprises, at a temperature sufficiently low to prevent any shrinkage and deformation of said thermoplastic material or film, at least one stage of washing in an alkaline medium in a bath in the presence of an alkaline washing composition comprising at least from 5 to 18% of sodium hydroxide, from 3 to 12% of sodium carbonate, from 10 to 28% of sodium perborate and from 0 to 10% of surfactant.
A process for cleaning and sterilizing laminated or nonlaminated, woven or nonwoven, thermoplastic material or flexible thermoplastic film, in the form of bags for the transportation of food, chemical or cosmetic products, which comprises at least the following stages at a temperature sufficiently low to prevent any shrinkage and deformation of said thermoplastic material or film:
- a stage of washing in an alkaline medium in a bath in the presence of an alkaline washing composition comprising at least from 5 to 18% of sodium hydroxide, from 3 to 12% of sodium carbonate, from 10 to 28% of sodium perborate and from 0 to 10% of surfactant,
- a stage of washing or sterilizing in a bath in the presence of a bleaching and disinfecting agent, and
- a stage of neutralization of the alkaline medium by an acidic product.
An alkaline composition for the washing of laminated or nonlaminated, woven or nonwoven, thermoplastic material or flexible thermoplastic film, which comprises at least from 5 to 18% of sodium hydroxide, from 3 to 12% of sodium carbonate, from 10 to 28% of sodium perborate and from 0 to 10% of surfactant.
Dependencies are inferred from the claim text.