Industrial textile washing process

Abstract

The invention relates to a method for washing textiles conveyed in motion in a rotating drum of a washer-extractor, comprising at least one washing phase of the textiles to be washed during which the textiles to be washed are in contact with an aqueous washing composition comprising: - an enzymatic detergent comprising at least one non-ionic detergent, at least one anionic detergent and at least one enzyme, and; - at least one alkaline detergent; characterized in that: the enzymatic detergent has, in the aqueous washing composition, a proportion of between 2 and 4 grams of enzymatic detergent per kilogram of textiles to be washed, in that the alkaline detergent has, in the aqueous washing composition, a mass proportion of between 3 and 4 grams of alkaline detergent per kilogram of textiles to be washed, and in that the washing process is carried out at ambient temperature and without the intentional addition of ozone.Figure for the abbreviation: Figure 1.

Description

Title of the invention: Industrial textile washing process

[0001] The invention relates to the general field of washing, cleaning, disinfection and / or laundering of textiles in industrial laundry, in particular washing, cleaning, disinfection and / or laundering in industrial laundry of textiles used in industry and / or in communities and in particular in hospitals, for which the regulatory provisions relating to hygiene and bacteriological control may be strict, rigorous and restrictive.

[0002] Industrial laundry processes and washing machine-type devices for implementing such processes are known, making it possible to effectively wash soiled textiles, in particular soiled textiles. Conventionally, in such industrial laundry devices and processes, in particular in such industrial laundry devices installed in laundries intended for washing textiles used in a hospital environment, the washing water, and consequently the textiles, are heated to a temperature above 40°C, in practice above 60°C and often between 60°C and 80°C to obtain washed textiles satisfying the disinfection levels required in a hospital environment.

[0003] Such installations or industrial laundries provide acceptable results but pose problems.

[0004] Such heating, in particular such heating of the washing water, requires a significant input of heat energy so that the washing water reaches such a temperature and the textiles are effectively washed and, where appropriate, disinfected.

[0005] Furthermore, such a supply of heat energy is the cause of the production and significant release of carbon dioxide (CO2) into the atmosphere.

[0006] Furthermore, with regard to industrial installations or laundries implementing ozone treatment of soiled textiles, they require the implementation of a specific device for the substantially extemporaneous production of ozone and for regulating the quantity and / or flow rate of ozone distributed in such a laundering installation.

[0007] Furthermore, current French legislation requires that the temperature of used fluids discharged by such industrial washing installations does not exceed 30°C. To comply with these regulatory provisions, known industrial washing installations must provide specific means for storing and cooling used and hot fluids prior to their discharge.

[0008] The invention aims to overcome these last two drawbacks in combination by proposing a process for industrial washing of textiles, in particular such a washing process including a disinfection process, which does not require bringing the textiles to high temperature between 60°C and 80°C, nor to provide a specific installation for cooling used aqueous fluids before discharge.

[0009] The invention also aims to propose a process for industrial washing of textiles, in particular such a process for industrial washing of textiles used in communities and in particular in hospitals, allowing at least a quantitative reduction of the bacterial flora of these textiles, satisfying the provisions of the AFNOR NFT 72101 standard which provides that a disinfectant must reduce the number of bacteria by a factor of 100,000 (105).

[0010] An industrial washer-extractor and a method for washing textiles using this washer-extractor are known from WO2007 / 143785. The washer-extractor of WO2007 / 143785 comprises a washing tub provided with a drum rotatably mounted in the washing tub and means for introducing a washing liquid into the washing tub to form a washing bath, the drum being adapted to receive and contain textiles to be washed and to bring the textiles to be washed into contact with the washing bath. In the textile washing method of WO2007 / 143785, ozone is introduced into the washing liquid in an amount effective for washing the textiles to be washed.

[0011] The washer-extractor and the textile washing method of WO2007 / 143785 require the production of ozone by means of an ozone generator. This ozone generator associated with the washing machine and the washing method, although they provide advantages in terms of washing and bleaching the laundry, remain however more complex than devices and methods without ozone, in particular with regard to the dosage and control of the quantity of ozone introduced into the washing machine.

[0012] The invention aims to overcome this drawback.

[0013] The invention aims to propose a method for industrial washing of soiled textiles, in particular such a method for industrial washing of soiled textiles used in communities and in particular in hospitals, not requiring the voluntary addition of ozone, in particular gaseous ozone, to the textiles during the washing cycle of these textiles.

[0014] The invention therefore aims to propose such an industrial washing method which does not require the use of an ozone generating device. The invention therefore aims to propose such a washing method which is simplified, with equal or improved efficiency in washing textiles compared to a washing method comprising at least one voluntary addition of ozone.

[0015] The invention therefore aims to propose such an ozone-free washing method which does not require controlling the release of ozone in the room in which the washing method is carried out.

[0016] The invention also aims to propose such a method for washing soiled textiles, implemented in an industrial washer-extractor.

[0017] The invention therefore aims to propose a washing method, in particular a washing and disinfection method, for soiled textiles allowing not only washing (i.e. at least partial removal, in particular total removal, of dirt) but also at least partial disinfection - in particular total disinfection - of these soiled textiles, in accordance with regulatory standards.

[0018] The invention aims in particular to propose such a method which allows washing and, where appropriate, disinfection of white textiles (commonly called "white") but also of colored textiles (commonly called "color").

[0019] The invention thus aims to propose such a washing process implemented at room temperature, in particular implemented without intentional heating of aqueous pre-wash, washing or rinsing compositions. The invention therefore aims to propose such a washing process at room temperature which is energetically optimized.

[0020] The invention thus aims to propose such a washing method implemented at room temperature, in particular without intentional heating, making it possible to limit the formation of a limescale deposit in an industrial textile washing device, in which such a method is implemented.

[0021] The invention also aims to propose such a method making it possible to significantly delay the graying of textiles, in particular due to such a deposit of limestone.

[0022] In particular, the invention aims to propose such a washing method which makes it possible to limit the formation of such a limescale deposit on components of an industrial washer-extractor in which such a method is implemented, these components coming into contact with an aqueous composition for washing these textiles, in particular on certain mechanical parts and on the seals.

[0023] The invention therefore aims to propose such a washing method which makes it possible to reduce the maintenance and servicing procedures of such an industrial washing device, whilst ensuring greater longevity for such a device.

[0024] The invention thus aims to propose such a washing method which makes it possible to reduce the frequency of maintenance interventions.

[0025] The invention thus aims to propose such a washing method which allows optimal preservation of the quality of the washed textiles in comparison with known methods, in particular hot washing methods.

[0026] The invention also aims to propose such a washing method making it possible to achieve a substantial saving in the water required for its implementation compared to hot methods.

[0027] In particular, the invention aims to propose such a method making it possible to reduce by around 33% (4 L of water saved on a consumption of 13 L of water per kilogram of textiles washed and disinfected) the quantity of water required for washing. of the same quantity of the same type of textiles, compared to a washing process carried out at 40°C or 60°C.

[0028] The invention also aims and in particular to propose such a method making it possible to obtain a disinfection of a level at least equal to the level obtained by the industrial washing and disinfection methods of the prior art.

[0029] The invention also aims to propose such a method making it possible to obtain washing and disinfection of a quality at least equal to the quality of washing and disinfection obtained by methods of the prior art.

[0030] Thus, the invention aims to propose such a method capable of being implemented without even minor modification of a known industrial washer-extractor.

[0031] Finally, the invention aims to propose such a method which makes it possible to limit the heating of the atmospheric air surrounding the industrial washer-extractor in which the method according to the invention is implemented, in particular lower than that of hot methods.

[0032] The invention therefore also aims to propose such a method which respects the working conditions of the personnel responsible for implementing the method. In particular, the invention aims to propose such a method making it possible to maintain a comfortable temperature for the personnel responsible for implementing the washing method in the washing room.

[0033] To this end, the invention relates to a method for washing - in particular a method for washing and disinfecting - textiles, in which soiled textiles to be washed are moved in a rotating drum of a washer-extractor, the washing method comprising at least one phase of washing the textiles to be washed during which the textiles to be washed are in contact with an aqueous washing composition comprising: - an enzymatic detergent detergent comprising at least one non-ionic detergent, at least one anionic detergent and at least one enzyme, in particular at least one hydrolase - for example a hydrolase of bacterial origin -, having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between 15°C and 20°C, and; - at least one alkaline detergent; characterized in that: the enzymatic detergent detergent has in the aqueous washing composition a mass proportion belonging to a value interval extending from around 2 grams to around 6 grams of enzymatic detergent detergent per kilogram of dry soiled textiles to be washed, in that the alkaline detergent has in the aqueous washing composition a proportion mass belonging to a value interval extending from around 3 grams to around 10 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, in particular from around 3 grams to around 6 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, preferably from around 3 grams to around 4 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, in particular from around 3.5 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, and in that the washing process is carried out at room temperature and without the intentional addition of ozone, in particular without the intentional addition of ozone to the washing composition.

[0034] Throughout the text: - the expression "room temperature" commonly refers in the field of industrial laundry to a temperature obtained without deliberate and / or intentional heating or deliberate and / or intentional cooling of the aqueous compositions used during the washing process. In particular, a washing process according to the invention carried out at room temperature does not include any deliberate addition of heat or cold, - the expressions "of the order of" and "substantially" usually indicate that a numerical value should not be taken as marking an abrupt discontinuity, which would have no physical meaning, but covers not only this numerical value, but also slight variations in this numerical value which produce, in the technical context considered, an effect of the same nature, if not of the same degree.

[0035] According to the invention, the soiled textiles may be of any type and origin. The washing method according to the invention is effective on any type of soiling. Generally, it may be textiles soiled by at least one soiling which may come from various and varied origins. It may be textiles soiled by at least one particulate soiling, for example a particulate soiling caused by earth, soot or dust. It may be textiles soiled by at least one greasy soiling, in particular a soiling originating from food, such as for example a stain of butter and / or oil and / or cream and / or an emulsion such as a mayonnaise stain and / or a seasoning vinaigrette stain. These may be textiles soiled by at least one stain from everyday life - such as a makeup or foundation stain.These may be textiles soiled by at least one enzyme-sensitive stain, such as a blood stain, a grass stain, an egg yolk stain. These may be textiles soiled by at least one organic stain, such as perspiration, sebum, urine, feces, etc. These may be oxidizable stains in the form of a coffee stain, a wine stain or a stain from various fruit juices, but . sensitive to the action of at least one detergent and / or degreasing agent. These may be textiles soiled by at least one stain caused by a lubricant such as an oil, in particular a mineral oil.

[0036] More particularly, it may be textiles soiled by at least one stain chosen from the group consisting of a grass stain, a wine stain, a tomato stain, in particular a tomato juice stain, a blueberry stain, a blackcurrant stain, a mineral oil stain, a sebum stain, a carbon black stain, a makeup stain, a mayonnaise stain, a meat sauce stain, a chocolate stain and / or a chocolate milk stain, a fresh blood stain or a dried blood stain, a pectin stain, a tea stain, a coffee stain, a wine stain, a grass stain, a fruit stain such as for example a blueberry stain, a blackcurrant stain, a blackberry stain, a raspberry stain.It may be at least one soiling embedded in the mesh of the soiled textile and / or at least one so-called superficial soiling extending on the surface of the soiled textile without significant impregnation of said soiling in the thickness of the soiled textile.

[0037] In a method according to the invention, no intentional addition of ozone ("trioxygen", O3) is carried out, in particular no intentional addition of ozone for its bleaching effect on textiles. In a method according to the invention, no intentional addition of ozone gas is carried out in the aqueous washing composition and / or in the aqueous pre-wash composition and / or in the aqueous rinsing composition. In a method according to the invention, no intentional addition of ozone gas by bubbling is carried out in the aqueous washing composition and / or in the aqueous rinsing composition. In a method according to the invention, no intentional addition of an aqueous ozone solution is carried out in the aqueous washing composition and / or in the aqueous rinsing composition.

[0038] In a method according to the invention, at least one detergent is a detergent which is not sensitive to ozone, that is to say a detergent which retains its washing properties in an ozone washing method. At least one, in particular each, detergent used in an ozone-free washing method according to the invention is a detergent chosen not to be sensitive to ozone.

[0039] According to the invention, the method is implemented in a washer-extractor in which at least two successive phases - in particular all of the successive phases - are carried out in the same volume of the closed rotating drum of the washer-extractor.

[0040] According to certain embodiments, the aqueous washing composition further comprises a degreasing detergent comprising at least one non-ionic surfactant - in particular at least one ethoxylated alcohol -, the degreasing detergent being used with a mass ratio, in the aqueous washing composition, of between the order of 1.0 gram and of the order of 5.0 grams of degreasing detergent per kilogram of dry soiled textiles (i.e. per kilogram of soiled textile(s) before bringing the dry soiled textiles into contact with the aqueous washing composition), in particular between of the order of 1 gram and of the order of 3 grams of degreasing detergent per kilogram of dry soiled textiles (i.e. per kilogram of soiled textile(s) before bringing the dry soiled textiles into contact with the aqueous washing composition), preferably at a rate of of the order of 2.0 grams of degreasing detergent per kilogram of dry soiled textiles to be washed.

[0041] According to certain embodiments, the aqueous washing composition further comprises a washing, disinfecting and bleaching detergent comprising peracetic acid, the washing, disinfecting and bleaching detergent having in the aqueous washing composition a mass proportion belonging to a value range extending from about 3.5 grams to about 4.5 grams of washing, disinfecting and bleaching detergent per kilogram (dry mass) of dry soiled textiles to be washed, in particular about 4.0 grams of washing, disinfecting and bleaching detergent per kilogram (dry mass) of dry soiled textiles to be washed.

[0042] According to certain embodiments, the washing method according to the invention comprises a second subsequent washing phase during which the soiled textiles to be washed are in contact with a second aqueous washing composition comprising a washing, disinfecting and bleaching detergent comprising peracetic acid, in particular comprising peracetic acid in a mass proportion of between about 5% and about 15%, preferably of about 15%, the washing, disinfecting and bleaching detergent having in the aqueous washing composition a mass proportion belonging to a range of values ​​extending from about 3.5 grams to about 5.0 grams of washing, disinfecting and bleaching detergent per kilogram of dry soiled textiles to be washed, in particular extending from about 3.5 grams to about 4.5 ... washing,of disinfection and bleaching per kilogram of dry soiled textiles to be washed, preferably of the order of 4.0 grams of washing, disinfection and bleaching detergent per kilogram of dry soiled textiles to be washed.

[0043] According to some of these embodiments, the washing phase at room temperature has a duration of between about 8 minutes and about 20 minutes. According to some of these embodiments, the method according to the invention comprises a phase of washing the soiled textiles to be washed in which the soiled textiles to be washed are in contact with an aqueous washing composition comprising at least one of: - an enzymatic detergent detergent with a dosage of around 4 grams of enzymatic detergent detergent per kilogram of dry soiled textiles to be washed, - a sequestering alkaline strengthening detergent with a dosage of around 4 grams of alkaline strengthening detergent per kilogram of dry soiled textiles to be washed, and / or - a bleaching and disinfecting agent with a dosage of around 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, the washing phase having a duration of between about 8 minutes and about 20 minutes, in particular a duration of between about 10 minutes and about 15 minutes. In certain embodiments, the washing phase having a duration of about 10 minutes. In certain other embodiments, the washing phase having a duration of about 15 minutes.

[0044] According to certain embodiments, the washing method according to the invention comprises at least one initial phase of pre-washing the soiled textiles to be washed, each initial pre-washing phase being carried out at room temperature and without the voluntary addition of ozone.

[0045] According to some of these embodiments, the pre-wash phase at room temperature has a duration of between about 2 minutes and about 10 minutes. According to some of these embodiments, the method according to the invention comprises a pre-wash phase of the soiled textiles to be washed in which the soiled textiles to be washed are in contact with an aqueous pre-wash composition comprising at least one of: - an enzymatic detergent with a dosage of around 4 grams of enzymatic detergent per kilogram of dry soiled textiles to be washed, - a sequestering alkaline strengthening detergent with a dosage of around 3.5 grams of alkaline strengthening detergent per kilogram of dry soiled textiles to be washed, the pre-wash phase having a duration of between about 2 minutes and about 10 minutes, in particular a duration of about 4 minutes. According to certain embodiments, the aqueous pre-wash composition further comprises a degreasing detergent comprising at least one non-ionic surfactant - in particular at least one ethoxylated alcohol -, the degreasing detergent being used with a mass ratio, in the aqueous washing composition, of between about 2.5 grams and about 3.5 grams of degreasing detergent per kilogram of dry soiled textiles (i.e. per kilogram of soiled textile(s) before bringing the dry soiled textiles and the aqueous pre-wash composition into contact), in particular with a mass ratio of 3.0 ... logram of dry soiled textiles to be washed.

[0046] According to some of these embodiments, the subsequent washing phase, carried out at room temperature, has a duration of between about 10 minutes and about 20 minutes. According to some of these embodiments, the method according to the invention comprises a subsequent phase of washing the soiled textiles to be washed, in which the soiled textiles to be washed are in contact with an aqueous washing composition comprising a bleaching and disinfecting agent with a dosage of 3 grams to 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, the washing phase having a duration of between around 10 minutes and around 15 minutes. Nothing prevents the washing phase from having a plurality of successive washing steps, each successive washing step being carried out in the presence of at least one bleaching and disinfecting agent.

[0047] In a washing process - in particular a washing and disinfection process - for textiles according to the invention, at least one enzymatic detergent detergent is deliberately added to the aqueous washing composition impregnating the soiled textiles to be washed. In a washing process - in particular a washing and disinfection process - for textiles according to the invention, at least one alkaline detergent is deliberately added to the aqueous washing composition impregnating the soiled textiles to be washed. In a washing process - in particular a washing and disinfection process - for textiles according to the invention, at least one degreasing detergent is deliberately added to the aqueous washing composition impregnating the soiled textiles to be washed.In a washing process - in particular a washing and disinfection process - for textiles according to the invention, a voluntary addition of at least one washing, disinfection and bleaching detergent, in particular a washing, disinfection and bleaching detergent comprising peracetic acid, is carried out in the aqueous washing composition impregnating the soiled textiles to be washed.

[0048] According to certain embodiments, the washing method according to the invention comprises at least one phase of rinsing the washed textiles adapted to produce washed textiles substantially free of said detergent(s).

[0049] The detergent(s) used in the washing process according to the invention and its dosage(s) is(are) chosen so that the effectiveness of removing soiling from a soiled textile, obtained by the washing process according to the invention without ozone and at room temperature, is at least equal to the effectiveness of removing soiling from a soiled textile obtained by a process for washing textiles with ozone implemented with the same detergent(s) as the process according to the invention, but including a voluntary addition of ozone.

[0050] According to certain embodiments, at least one detergent is an enzymatic detergent comprising from about 5% to about 15% of anionic surfactants and from about 15% to about 35% of non-ionic surfactants, the percentages being percentages by mass (m / m).

[0051] According to certain embodiments, the enzymatic detergent detergent comprises at least one enzyme, in particular at least one hydrolase, for example a hydrolase of bacterial origin, having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between 15°C and 20°C.

[0052] According to certain embodiments, at least one enzyme of the enzymatic detergent detergent is chosen from the group formed by proteases - in particular proteases having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between 15°C and 20°C, amylases - in particular amylases having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between 15°C and 20°C, lipases - in particular lipases having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between between 15°C and 20°C - and cellulases - in particular cellulases with an optimal activity temperature below 35°C, in particular between 13°C and 35°C,preferably between 15°C and 28°C, more preferably between 15°C and 20°C.

[0053] According to certain embodiments, at least one anionic detergent of the enzymatic detergent detergent is a sodium sulfate, in particular sodium lauryl sulfate (CAS No. 85586-07-8). According to certain embodiments, at least one anionic detergent of the enzymatic detergent detergent is a sulfonate, in particular sodium cumene sulfonate (CAS No. 15763-76-5). According to certain embodiments, at least one anionic detergent of the enzymatic detergent detergent is selected from the group consisting of sodium sulfates, in particular sodium lauryl sulfate (CAS No. 85586-07-8) and sulfonates, in particular sodium cumene sulfonate (CAS No. 15763-76-5).

[0054] According to certain embodiments, at least one non-ionic detergent of the enzymatic detergent detergent is an ethoxylated alcohol, in particular an ethoxylated alcohol chosen from the group consisting of polyethoxylated isotridecanol (CAS No. 69011-36-5) and (2-methoxymethylethoxy) propanol (CAS No. 34590-94-8).

[0055] According to certain embodiments, the enzymatic detergent detergent comprises as active ingredients: - from 18% to 35% of polyethoxylated isotridecanol (CAS No. 69011-36-5), - from 5% to 10% of (2-methoxymethylethoxy) propanol (CAS No. 34590-94-8), - from 3% to 5% of sodium lauryl sulfate (CAS No. 85586-07-8), - at most 3% sodium cumene sulfonate (CAS No. 15763-76-5), and - at least one enzyme, in particular at least one hydrolase, for example a hydrolase of bacterial origin, having an optimal activity temperature of less than 35°C, in particular between 13°C and 35°C, preferably between 15°C and 28°C, more preferably between 15°C and 20°C, the percentages being percentages in mass (m / m).

[0056] According to some of these embodiments, at least one of the detergents is the enzymatic detergent detergent proposed under the name “Garo®sive Deter” (Christeyns France SA, Vertou, France). According to these embodiments of the invention, the enzymatic detergent detergent “Garo®sive Deter” is used with a mass ratio of between about 3.5 grams and about 4.5 grams of enzymatic detergent detergent added per kilogram of dry soiled textile(s) (i.e. per kilogram of soiled textile(s) before bringing the soiled textile(s) into contact with the washing quenching composition), in particular at a rate of about 4 grams of enzymatic detergent detergent per kilogram of dry soiled textile(s).

[0057] The enzymatic detergent detergent "Garo®sive Deter" is known for its use as an enzymatic detergent in an ozone washing process with a recommendation for use for a dosage of 2.5 to 3.5 g of "Garo®sive Deter" detergent per kilogram of dry laundry in a pre-wash step and with a dosage of 1.0 to 1.5 g of "Garo®sive Deter" per kilogram of dry laundry in a washing step of such an ozone washing process of textiles in a washing tunnel.

[0058] According to certain embodiments, at least one of the detergents is an alkaline detergent. According to certain of these embodiments, the alkaline detergent comprises sodium hydroxide (NaOH). According to certain of these embodiments, the alkaline detergent comprises sodium hydroxide in a mass proportion of between about 10% and about 30%. Other alkaline detergents are possible. These may be alkaline detergents comprising potash (KOH) or a mixture of potash and soda (NaOH), in particular.

[0059] According to some of these embodiments, the alkaline detergent is the sequestering alkaline detergent proposed under the name “GARO®BOOST” (Christeyns France SA, Vertou, France). According to some of these embodiments, the “GARO®BOOST” alkaline detergent is used with a mass ratio of between about 3.0 grams and about 10.0 grams of “GARO®BOOST” alkaline detergent per kilogram of dry soiled textile(s) (i.e. per kilogram of textile(s) soiled textile(s) before bringing the soiled textile(s) into contact with the washing composition), in particular of the order of 3 grams to of the order of 6 grams of “GARO®BOOST” alkaline detergent per kilogram of dry soiled textile(s) to be washed, preferably of the order of 3 grams to of the order of 4 grams of “GARO®BOOST” alkaline detergent per kilogram of dry soiled textile(s) to be washed, in particular of the order of 4.0 grams of “GARO®BOOST” alkaline detergent per kilogram of dry soiled textile(s) to be washed.

[0060] The “GARO®BOOST” detergent comprising sodium hydroxide (NaOH) in a mass proportion of between around 10% and around 30% is known for its use as an alkaline detergent in an ozone washing process and for a recommendation for use with a dosage of 1.0 g to 1.5 g of “GARO®BOOST” alkaline detergent per kilogram of dry laundry in a pre-washing step of an “ozone” textile washing process or with a dosage of 2.5 g to 3.0 g of “GARO®BOOST” alkaline detergent per kilogram of dry laundry in a washing step of an “ozone” textile washing process.

[0061] According to certain embodiments, the degreasing detergent containing at least one non-ionic surfactant - in particular at least one ethoxylated alcohol -, intended for the removal of greasy soiling(s), said at least one non-ionic surfactant being present in the degreasing and emulsifying strengthening detergent in a proportion at least equal to 30%, this percentage being a percentage by mass (m / m).

[0062] According to some of these embodiments, the degreasing detergent comprises at least 60% by mass of ethoxylated alcohol(s) chosen from the group formed: - 12-methyl-2-ethoxy-tetradecanol-l (CAS 157627-86-6), - a composition of ethoxylated Ci2-Ci4 alcohols (CAS 68439-50-9), - a composition of ethoxylated alcohols in Ci2-Ci5 (CAS 68131-39-5), - a composition of ethoxylated alcohols in Ci2-Ci8 (CAS 68213-23-0), - a composition of ethoxylated alcohols in Ci2-Ci6 (CAS 68551-12-2), and - a composition of ethoxylated alcohols in Ci2-Cb (CAS 160901-19-9).

[0063] According to some of these embodiments, the degreasing detergent comprises at least 60% by mass of ethoxylated alcohols including: - 12-methyl-2-ethoxy-tetradecanol-l (CAS 157627-86-6), - a composition of ethoxylated Ci2-Ci4 alcohols (CAS 68439-50-9), - a composition of C12-C15 ethoxylated alcohols (CAS 68131-39-5), - a composition of C12-C18 ethoxylated alcohols (CAS 68213-23-0), - a composition of C12-C16 ethoxylated alcohols (CAS 68551-12-2), and - a composition of C12-C18 ethoxylated alcohols (CAS 160901-19-9).

[0064] According to some of these embodiments, the degreasing detergent is the degreasing detergent for ozone process, proposed under the name of “MULAN EXTREME” (Christeyns France SA, Vertou, France). According to some of these embodiments, the degreasing detergent “MUEAN EXTREME” is used with a mass ratio of between about 1.0 grams and about 3.0 grams of degreasing detergent added per kilogram of dry soiled textile(s) (i.e. per kilogram of soiled textile(s) before bringing the soiled textile(s) into contact with the washing quenching composition), in particular at a rate of about 2.0 grams of degreasing detergent per kilogram of dry soiled textile(s).

[0065] According to certain other of these embodiments or in combination, the degreasing detergent comprises at least 70% of ethoxylated alcohols chosen from the group formed: - polyethoxylated isotridecanol (CAS no. 69011-36-5); - a composition of ethoxylated alcohols in Ci2-Ci3 (CAS 160901-19-9); - 3-butoxy-2-propanol (CAS 5131-66-8-19-9).

[0066] According to certain other of these embodiments or in combination, the degreasing detergent comprises: - polyethoxylated isotridecanol (CAS no. 69011-36-5) in a mass proportion of at least 60%; - a composition of ethoxylated Ci2-Ci3 alcohols (CAS 160901-19-9) in a mass proportion of between around 10% and around 30%; - 3-butoxy-2-propanol (CAS 5131-66-8-19-9) in a mass proportion of between around 1% and around 3%.

[0067] According to some of these other embodiments, the degreasing detergent is used with a mass ratio of between about 4.0 grams and about 6.0 grams of degreasing detergent added per kilogram of dry soiled textile(s), in particular at a rate of about 5.0 grams of degreasing detergent per kilogram of dry soiled textile(s).

[0068] According to some of these other embodiments, the degreasing detergent is the degreasing detergent for ozone process, proposed under the name of "COOE STAR" (Christeyns France SA, Vertou, France). According to some of these other embodiments, the degreasing detergent "COOE STAR" is used with a mass ratio of between about 4.0 grams and about 6.0 grams of degreasing detergent "COOE STAR" added per kilogram of dry soiled textile(s), in particular at a rate of about 2.0 grams of degreasing detergent "COOE STAR" per kilogram of dry soiled textile(s).

[0069] According to certain embodiments, at least one of the detergents is a washing, disinfecting and bleaching detergent. According to certain of these embodiments, the washing, disinfecting and bleaching detergent comprises peracetic acid. According to certain of these embodiments, the washing, disinfecting and bleaching detergent comprises - in particular is formed from - a stabilized mixture of peracetic acid, hydrogen peroxide and acetic acid. According to some of these embodiments, the washing and disinfecting detergent comprises peracetic acid in a volume proportion of between about 5% and about 15%. According to some of these embodiments, the washing, disinfecting and bleaching detergent comprises acetic acid in a volume proportion of between about 10% and about 30%. According to some of these embodiments, the washing, disinfecting and bleaching detergent comprises hydrogen peroxide (H2O2) in a volume proportion of between about 10% and about 30%.According to some of these embodiments, the washing, disinfecting and bleaching detergent comprises peracetic acid in a volume proportion of between about 5% and about 15%, acetic acid in a volume proportion of between about 10% and about 30% and hydrogen peroxide (H2O2) in a volume proportion of between about 10% and about 30%.

[0070] According to some of these embodiments, at least one washing, disinfecting and bleaching detergent is known under the trade name "PERACID FORTE" (Christeyns France SA, Vertou, France). According to some of these embodiments, the washing and disinfecting detergent "PERACID FORTE" is used with a mass ratio of between about 3.0 grams and about 5.0 grams of washing and disinfecting detergent added per kilogram of dry soiled textile(s) (i.e. per kilogram of soiled textile(s) before bringing the soiled textile(s) into contact with the washing quenching composition), in particular at a rate of about 4.0 grams of washing and disinfecting detergent added per kilogram of dry soiled textile(s). According to some of these embodiments, the duration of the washing phase at room temperature is between 7 min and 10 min.

[0071] Surprisingly, the addition of a washing, disinfecting and bleaching detergent containing peracetic acid during a washing step of a process according to the invention, this addition being carried out in such a way that the quantity of washing, disinfecting and bleaching detergent corresponds to a proportion of between around 3.0 grams and around 5.0 grams - in particular around 4.0 grams - per kilogram (dry weight) of textiles present in the drum of the washer-extractor, it is possible to obtain a thorough disinfection of the textiles at room temperature, whereas the disinfecting property of peracetic acid at this dosage is only sought in an industrial textile washing process for washing temperatures above 40°C.

[0072] According to certain embodiments, said washing composition is free of sodium hypochlorite (NaCfO or “bleach”). However, according to certainparticular embodiments, in particular according to certain modes of implementation of a textile washing process requiring intensive washing of particularly dirty, soiled, stained or even bacteriologically contaminated textiles, nothing prevents the provision of an addition of bleach in the aqueous washing composition, the textile washing process being implemented at room temperature. According to some of these embodiments, at least one of the detergents added is bleach at a concentration of 12.5% ​​active chlorine. According to some of these embodiments, the bleach is used with a mass ratio of between 10 and 30 grams of bleach added per kilogram of dry soiled textile(s) (i.e. per kilogram of soiled textile(s) before bringing the soiled textile(s) into contact with the washing quenching composition), in particular at a rate of 20 grams of bleach added per kilogram of dry soiled textile(s)..

[0073] According to certain embodiments, the method according to the invention comprises at least one step of pre-washing the textiles to be washed, said at least one step of pre-washing the textiles to be washed being carried out prior to the step of washing these same textiles to be washed. In these embodiments, the pre-washing step is carried out at room temperature, that is to say without intentional heating of the pre-washing composition. In these embodiments, the pre-washing step is carried out without intentional addition of ozone.

[0074] According to some of these embodiments, the pre-wash phase at room temperature comprises at least one pre-wash step selected from the group consisting of: - a pre-wash step during which soiled textiles to be washed are in contact with an aqueous pre-wash composition comprising at least one enzymatic detergent detergent with a dosage of enzymatic detergent detergent of between 3.0 grams and 5.0 grams - in particular 4.0 grams - of enzymatic detergent detergent per kilogram of dry soiled textiles to be washed, - a pre-wash step during which soiled textiles to be washed are in contact with an aqueous pre-wash composition comprising at least one degreasing booster detergent with a dosage of degreasing booster detergent of between 2.0 grams and 4.0 grams - in particular of the order of 3.0 grams - of degreasing booster detergent per kilogram of dry soiled textiles to wash,- a pre-washing step during which soiled textiles to be washed are in contact with an aqueous pre-washing composition comprising at least one alkaline strengthening detergent with a dosage of alkaline strengthening detergent of between around 3.0 grams and around 4.0 grams - in particular around 3.5 grams - of alkaline strengthening detergent per kilogram of dry soiled textiles to be washed.

[0075] According to some of these embodiments, the pre-wash phase at temperature ambient comprises a pre-washing step during which soiled textiles to be washed are in contact with an aqueous pre-washing composition comprising: - at least one enzymatic detergent detergent with a dosage of enzymatic detergent of between 3.0 grams and 5.0 grams - in particular 4.0 grams - of enzymatic detergent detergent per kilogram of dry soiled textiles to be washed, - at least one degreasing booster detergent with a dosage of degreasing booster detergent of between around 2.0 grams and around 4.0 grams - in particular around 3.0 grams - of degreasing booster detergent per kilogram of dry soiled textiles to be washed, and - at least one alkaline strengthening detergent with a dosage of alkaline strengthening detergent of between about 3.0 grams and about 4.0 grams - in particular about 3.5 grams - of alkaline strengthening detergent per kilogram of dry soiled textiles to be washed. In these embodiments, the pre-wash phase at room temperature has a duration of between 2 min and 5 min.

[0076] According to certain embodiments, a washing method according to the invention comprises a phase of rinsing the washed textiles, during which the washed textiles are in contact with an aqueous rinsing composition so as to provide washed textiles substantially free of detergents.

[0077] In certain advantageous embodiments of a method according to the invention, said washing composition is an aqueous composition. Said washing composition is an aqueous solution comprising at least one detergent agent and at least one enzyme. Said washing composition is a solution of at least one detergent agent and at least one enzyme in water. It may be water with a low hydrotimetric titer (TH), in particular less than or equal to 15°f (“French degree”, 1°f corresponds to a calcium ion concentration equal to 4 mg / L) not requiring softening treatment. It may be water with an average hydrotimetric titer (TH), in particular between 15°f and 25°f for which softening treatment is desirable. It may be water with a high hydrotimetric titer (TH), in particular between 25°f and 35°f for which softening treatment is recommended.It may be water with a very high hydrotimetric strength (TH), in particular greater than 35°f for which a softening treatment is essential. In a method according to the invention, the constituents of said washing composition are adapted according to the hydrotimetric strength of the water used.

[0078] The invention also relates to a washing process characterized, in combination or not, by all or part of the characteristics mentioned above or below. Whatever the formal presentation given thereof, unless explicitly indicated otherwise, the various characteristics mentioned above or below must not not be considered as closely or inextricably linked together, the invention may relate to only one of these structural or functional features, or only part of these structural or functional features, or only part of one of these structural or functional features, or any grouping, combination or juxtaposition of all or part of these structural or functional features.

[0079] Other aims, characteristics and advantages of the invention will appear on reading the following description, the drawings and the illustrative examples of certain possible but non-limiting embodiments of the invention, in which:

[0080] [Fig-1] the single [Fig.l] is a flowchart representative of an embodiment particular of a room temperature washing process according to the invention.

[0081] The method for washing soiled textiles at room temperature comprises a first pre-washing phase 1 during which soiled textiles 2 are brought into contact with an aqueous pre-washing composition 3 comprising at least one enzymatic detergent detergent 4, at least one alkaline booster detergent 5 and at least one degreasing booster detergent 6. The soiled textiles 2 are kept in contact with the aqueous pre-washing composition 3 at room temperature in the rotating drum of an industrial washer-extractor for a period of the order of 2 min to 5 min. During a subsequent phase 8 of washing the textiles at room temperature, the textiles 2 having undergone phase 1 are brought into contact with an aqueous washing composition 9 comprising a bleaching and disinfecting agent 10.The textiles 2 are kept in contact with the aqueous washing composition 9 at room temperature in the rotating drum of the industrial washer-extractor for a period of about 7 min to 10 min. During a subsequent draining phase 7, a washing / pre-washing composition 11 is drained from the tub of the washer-extractor. During a rinsing phase 12, the washed textiles are brought into contact with an aqueous rinsing composition 13 at room temperature and free of detergent, in the rotating drum of the industrial washer-extractor for a period of about 2 to 5 minutes. The rinsed textiles, substantially free of detergent, are, during a spinning phase 14, spun in the rotating drum of the industrial washer-extractor for a period of about 8 minutes. At the end of the washing program according to the invention, washed, rinsed and spun textiles 15 are removed from the drum of the industrial washer extractor.

[0082] SOIL REMOVAL - Evaluation of the effectiveness of washing soiled textiles. Each tested process of washing soiled textiles is reproduced three times. For each wash of soiled textiles, separate multi-soil test pieces are added to the soiled textiles. Each of these test pieces is fixed on a soiled textile from the load of textiles to be washed. The quality of the soil removal is determined completed by spectrophotometry using a light reflectance device. The removal efficiency (E, %) of the soiling considered is determined according to the formula (I) below:

[0083] [Math.l] r - RfRn xi nn “ Rb-RnX iUU in which: - E represents the percentage of removal of a stain from the corresponding stain test piece, - Rf represents the intensity of the radiation reflected by the stained area of ​​the test piece after washing, - Rn represents the intensity of the radiation reflected by the new test piece before washing, - Rb represents the intensity of the radiation reflected by the white textile (reference white) of the test piece and serving as a support for the corresponding dirt stain.

[0084] The removal percentage represents the ratio of the difference between the radiation emitted by the new soiled textile and the washed textile, to the difference in radiation emitted by the new soiled textile and the white textile. The difference in radiation emitted by the new soiled textile and the white textile represents the maximum variation obtainable.

[0085] The impregnated soils on multi-soiling test pieces are suitable for enabling and ensuring a rigorous evaluation of the performance of the washing process tested and an objective comparison between different washing tests. These impregnated soils correspond to demanding washing conditions. Surface application soils or superficial soils are suitable for representing everyday soiling encountered on used or worn textiles. They are applied to the surface of the textile of the test piece and fixed by air drying. They correspond to less demanding soiling conditions than impregnated soils.

[0086] EXAMPLE 1 A first series of tests is carried out by washing textiles stained with impregnated dirt, in an industrial washer-extractor of the Miele brand and with a nominal load of 20 kg, according to a program ("White Prewash") for washing "white" type textiles, including: - a first phase, pre-wash at room temperature, - a second phase, washing in a first bath at room temperature and in the presence of an anti-foam additive, of enzymatic detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®S1VE DETER” per kilogram of dry soiled textiles to be washed and sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed, - a third phase, washing in a second bath at room temperature and in the presence of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, and - a fourth phase, rinsing the washed textiles.

[0087] The average efficiency (E, %) of washing impregnated dirt, analyzed on the basis of each test piece of dirt washed at room temperature according to the invention is given in Table 1 below. The uncertainty on these measurements is 5%: [Tables 1] Impregnated dirt Effectiveness (E, %) Coffee 27 Grass 28 Mineral oil 22 Chocolate milk 13.5 Makeup 29 Mayonnaise 14 Blueberry 69 Pectin 35 Aged blood 34 Salad dressing 22 Meat sauce 60.5 Sebum / Carbon black 17 Tea 18 Wine 70

[0088] The “White Prewash” washing process at room temperature for textiles stained with impregnated dirt allows for high washing efficiency.

[0089] EXAMPLE 2 A second series of tests is carried out by washing textiles stained with impregnated dirt, in an industrial washer-extractor of the Miele brand and with a nominal load of 20 kg, according to a textile washing program ("Colour Prewash") of the “color” type, including: - a first pre-wash phase at room temperature, - a second washing phase in a first bath at room temperature and in the presence of an antifoam additive, enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 2 grams of detergent “GARO®S1VE DETER” per kilogram of dry soiled textiles to be washed, sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.5 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and degreasing booster detergent “MU LAN EXTREME” (Christeyns France SA, Vertou, France) at a dosage of 2 grams of detergent “MULAN EXTREME” per kilogram of dry soiled textiles to be washed, - a third phase in a second bath at room temperature and in the presence of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0090] The average efficiency (E, %) of washing impregnated dirt, analyzed on the basis of each test piece of dirt washed at room temperature in the absence of ozone according to the invention is given in Table 2 below. The uncertainty on these measurements is 5%: [Tables 2] Impregnated Dirt Effectiveness (E, %) Coffee 25 Grass 26 Mineral Oil 22 Chocolate Milk 12 Makeup 29 Mayonnaise 14 Blueberry 65 Pectin 32.5 Aged Blood 29 Salad Dressing 21 Meat Sauce 61 Sebum / Carbon Black 17 Tea 14 Wine 67

[0091] The "Color Prewash" washing process for colored textiles at room temperature provides high washing efficiency. The "Color Prewash" washing process for textiles stained with wine or coffee, at room temperature according to the invention provides particularly high efficiency.

[0092] EXAMPLE 3 A third series of tests is carried out by washing textiles stained with superficial dirt, in an industrial Miele brand washer-extractor with a nominal load of 20 kg, according to a program ("White Prewash") for washing "white" type textiles including: - a first pre-wash phase at room temperature, - a second washing phase in a first bath at room temperature and in the presence of an antifoam additive, enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®S1VE DETER” per kilogram of dry soiled textiles to be washed and sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed, - a third phase in a second bath at room temperature and in the presence of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0093] The average efficiency (E, %) of washing of surface soiling, analyzed on the basis of each soiling test piece washed at room temperature according to the invention is given in Table 3 below. The uncertainty on these measurements is 5%: [Tables 3] Surface soiling Efficiency (E, %) Coffee 74 Blood 82 Tea 41 Wine 67

[0094] The “White Prewash” washing process for textiles stained with surface soiling at room temperature provides high washing efficiency.

[0095] EXAMPLE 4 A fourth series of tests is carried out by washing textiles stained with superficial dirt, in an industrial washer-extractor of the Miele brand and with a nominal load of 20 kg, according to a program ("Color Prewash") intended for washing "color" type textiles including: - a first pre-wash phase at room temperature, - a second washing phase in a first bath at room temperature and in the presence of an antifoam additive, enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 2 grams of detergent “GARO®S1VE DETER” per kilogram of dry soiled textiles to be washed, sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.5 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and degreasing booster detergent “MU LAN EXTREME” (Christeyns France SA, Vertou, France) at a dosage of 2 grams of detergent “MULAN EXTREME” per kilogram of dry soiled textiles to be washed, - a third phase in a second bath at room temperature and in the presence of a bleaching and disinfecting agent “PERACID FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERACID FORTE” detergent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0096] The average efficiency (E, %) of washing of surface dirt, analyzed on the basis of each test piece of dirt washed at room temperature according to the invention and in the presence of ozone are given in Table 4 below. The uncertainty on these measurements is 5%: [Tables 4] Surface soiling Efficiency (E, %) Coffee 73 Blood 78 Tea 41 Wine 61

[0097] The “Color Prewash” washing process at room temperature for textiles stained with surface soiling provides high washing efficiency.

[0098] EXAMPLE 5 A fifth series of tests is carried out by washing textiles stained with impregnated dirt, in an industrial washer-extractor of the IPSO brand and with a nominal load of 28 kg, according to a program ("White") for washing "white" type textiles, including: - a washing phase in a first bath at room temperature and in the presence of an enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “GARO®S1VE DETER” detergent per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of “GARO®BOOST” detergent per kilogram of dry soiled textiles to be washed and of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0099] The average efficiency (E, %) of washing impregnated dirt, analyzed on the basis of each test piece of dirt washed at room temperature according to the invention is given in Table 5 below. The uncertainty on these measurements is 5%: [Tables 5] Impregnated dirt Effectiveness (E, %) Coffee 42 Grass 45 Mineral oil 62 Chocolate milk 24.5 Makeup 57 Mayonnaise 20 Blueberry 78 Aged blood 92 Salad dressing 31 Meat sauce 83 Sebum / Carbon black 26 Tea 34 Wine 88

[0100] The "White" room temperature washing process for white type textiles provides high washing efficiency.

[0101] EXAMPLE 6 A sixth series of tests is carried out by washing textiles stained with superficial dirt, in an industrial washer-extractor of the IPSO brand and with a nominal load of 28 kg, according to a program ("White") for washing "white" type textiles, including: - a washing phase in a first bath at room temperature and in the presence of an enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “GARO®S1VE DETER” detergent per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of “GARO®BOOST” detergent per kilogram of dry soiled textiles to be washed and of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0102] The average efficiency (E, %) of washing of surface dirt, analyzed on the basis of each test piece of dirt washed in the absence of ozone according to the invention and in the presence of ozone are given in Table 6 below. The uncertainty on these measurements is 5%: [Tableauxô] Surface soiling Efficiency (E, %) Coffee 76 Blood 91 Tea 67 Wine 75

[0103] The “White” washing process at room temperature for white textiles soiled with superficial stains provides high washing efficiency.

[0104] EXAMPLE 7 A seventh series of tests is carried out by washing textiles stained with impregnated dirt, in an industrial washer-extractor of the IPSO brand and with a nominal load of 28 kg, according to a program ("White") for washing "white" type textiles, including: - a washing phase in a first bath at room temperature and in the presence of an enzymatic detergent detergent “GARO®S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “GARO®S1VE DETER” detergent per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of “GARO®BOOST” detergent per kilogram of dry soiled textiles to be washed and of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0105] The average efficiency (E, %) of washing impregnated dirt, analyzed on the basis of each test piece of dirt washed at room temperature according to the method of the invention is given in Table 7 below. The uncertainty on these measurements is 5%: [Paintings?] Impregnated dirt Effectiveness (E, %) Coffee 42 Grass 45 Mineral oil 62 Chocolate milk 24 Makeup 57 Mayonnaise 20 Blueberry 78 Sebum / Carbon black 26 Aged blood 92 Salad dressing 31 Meat sauce 83 Tea 34 Wine 88

[0106] The “White” room temperature washing process for white textile type textiles provides high washing efficiency.

[0107] EXAMPLE 8 An eighth series of tests is carried out by washing textiles stained with impregnated dirt, in an industrial washer-extractor of the Primus brand. The 9 kg load of textiles is composed of 10 terry towels with a total mass of 5 kg and 16 polyester / cotton (50 / 50) kitchen aprons with a total mass of 4 kg, according to a program ("Pre-wash White Wash") for the pre-washing of "white" type textiles, including: - a first pre-wash phase lasting 3 minutes in a first bath at room temperature and in the presence of an enzymatic detergent detergent “GARO® S1VE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®S1VE DETER” per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 3.5 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and of a detergent and emulsifying detergent “MULAN EXTREME” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of detergent “MUEAN EXTREME” per kilogram of dry soiled textiles to be washed wash,

[0108] - a second washing phase lasting 10 minutes in a temperature bath room temperature and in the presence of “PERACID FORTE” washing, disinfection and bleaching detergent (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERACID FORTE” detergent per kilogram of dry soiled textiles to be washed,

[0109] - a third washing phase lasting 5 minutes in a bath at room temperature ambient and in the presence of “PERACID FORTE” washing, disinfection and bleaching detergent (Christeyns France SA, Vertou, France) at a dosage of 3 grams of “PERACID FORTE” detergent per kilogram of dry soiled textiles to be washed, - a fourth emptying phase lasting 30 seconds, - a fifth rinsing phase lasting 3 minutes, and - a final spin phase lasting 8 minutes.

[0110] For the purposes of comparing a process according to the invention at room temperature reproduced three times, the same “Prewash White Wash” process is compared to: - a washing process carried out at 40°C, and - a standard process implemented at 60°C.

[0111] The comparative washing process implemented at 40°C comprises: - a first pre-wash phase lasting 7 minutes in a first bath at a temperature of 35°C and in the presence of an emulsifying detergent “MUEAN EXTREME” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of detergent per kilogram of dry soiled textiles to be washed, - a second washing phase lasting 10 minutes in a bath at a temperature of 40°C and in the presence of enzymatic detergent detergent comprising between 5% and 15% of non-ionic surfactant and less than 5% of anionic surfactant at a dosage of 6 grams of detergent per kilogram of dry soiled textiles to be washed, - a third emptying phase lasting 1 minute, - a fourth rinsing phase lasting 2 minutes, - a fifth emptying phase lasting 1 minute, - a sixth rinsing phase lasting 4 minutes, and - a final spin phase lasting 7 minutes.

[0112] The comparative washing process implemented at 60°C comprises: - a first washing phase lasting 20 minutes in a first bath at a temperature of 60°C and in the presence of a standardized detergent at a dosage of 16 grams of standardized detergent per kilogram of dry soiled textiles to be washed and “PERACID FORTE” washing, disinfection and bleaching detergent (Christeyns France SA, Vertou, France) at a dosage of 8 grams of “PERACID FORTE” detergent per kilogram (dry mass) of dry soiled textiles to be washed, - a second emptying phase lasting 30 seconds, - a third rinsing phase lasting 3 minutes, - a fourth draining phase lasting 30 seconds, - a fifth rinsing phase lasting 3 minutes, - a sixth draining phase lasting 30 seconds, - a seventh rinsing phase lasting 3 minutes, and - a final spin phase lasting 8 minutes.

[0113] The average efficiency (E, %) of washing impregnated dirt according to the “Pre-wash White Wash” process and according to the comparative washing processes at 40°C and 60°C, analyzed on the basis of each washed dirt test piece are given in Table 8 below. The uncertainty on these measurements is 5%: [Tables 8] Impregnated soiling Wash at room temperature Reference 40°C Reference 60°C Coffee 32 33 30 Grass 43 43 44 Mineral oil 21 20 21 Chocolate milk 11.5 12 9 Makeup 25 22 27 Mayonnaise 18 18 18 Blueberry 64 63 63 Pectin 29 27 28 Aged blood 44 49 51 Salad dressing 26 26 28 Meat sauce 75 75 82 Sebum / Carbon black 21 21 21 Tea 21 23 19 Wine 75 77 79

[0114] The "Prewash White Wash" room temperature washing process for white textiles provides a washing efficiency at least as high as comparative reference processes implemented by heating to a temperature of 40°C and 60°C.

[0115] The average efficiency (E, %) of washing superficial soiling applied to a soiled textile woven with warps and wefts according to the “Pre-wash White Wash” process and according to the comparative washing processes at 40°C and 60°C, analyzed on the basis of each washed soiling sample is given in Table 9 below. The uncertainty on these measurements is 5%: [Tables 9] Surface soiling on woven fabrics Wash at room temperature Reference 40°C Reference 60°C Berries 77 74 96 Beef in sauce 82 82 90 Grass 79 68 76 Chocolate milk 55 50 77 Makeup 34 42 20 Mayonnaise 65 63 69 Carbon black 71 81 87 Salad dressing 56 55 69

[0116] The “Pre-Wash White Wash” room temperature washing process for white textiles provides comparable washing efficiency to comparative reference processes implemented by heating to a temperature of 40°C and 60°C.

[0117] The average efficiency (E, %) of washing at room temperature of superficial soiling applied to a soiled knitted textile according to the process according to the invention “Pre-wash White Wash” and according to the comparative reference processes washing at 40°C and 60°C, analyzed on the basis of each washed soiling test piece is given in table 10 below: [Tables 10] Surface soiling on knitted fabric Wash at room temperature Reference 40°C Reference 60°C Coffee 60 61 94 Blood 82 80 88 Tea 39 35 91 Wine 58 61 91

[0118] The process according to the invention for washing at room temperature “Pre-wash White Wash” of “white” type textiles provides a washing efficiency comparable to the washing efficiency of the comparative reference processes implemented by heating to a temperature of 40°C and 60°C.

[0119] MICROBIOLOGICAL DECONTAMINATION The effectiveness of microbiological decontamination of textiles provided by a washing process at room temperature and without the voluntary addition of ozone according to the invention is analyzed with respect to three distinct germs representative of spore-producing bacteria, molds and pathogenic bacteria.

[0120] Textile loads each seeded with one of three representative germs are introduced into a washer-extractor and treated according to the washing process (“White Prewash”) according to the invention described in example 1 and comprising: - a first pre-wash phase at room temperature, - a second washing phase in a first bath at room temperature and in the presence of an antifoam additive, enzymatic detergent detergent “GARO®SIVE DETER” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®SIVE DETER” per kilogram of dry soiled textiles to be washed and sequestering alkaline booster detergent “GARO®BOOST” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed, - a third phase in a second bath at room temperature and in the presence of a bleaching and disinfecting agent “PERAC1D FORTE” (Christeyns France SA, Vertou, France) at a dosage of 4 grams of “PERAC1D FORTE” detergent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0121] At the end of the washing, samples are taken from the seeding area for the purpose of evaluating the disinfection effectiveness provided by the washing process on the deposition area. A count is carried out by serial dilutions, seeding on suitable culture media, incubation under culture conditions and counting of the colonies formed. The room temperature washing process according to the invention provides results in terms of microbiological decontamination which comply with regulatory standards.

[0122] The invention may be the subject of numerous variants and applications other than those described above. In particular, it goes without saying that unless otherwise indicated the different structural and functional characteristics of each of the embodiments described above should not be considered as combined and / or closely and / or inextricably linked to each other, but on the contrary as simple juxtapositions. Furthermore, the structural and / or functional characteristics of the different embodiments described above may be the subject in whole or in part of any different juxtaposition or any different combination. 31

Claims

Claims

1. A method of washing textiles, in which soiled textiles to be washed are moved in a rotating drum of a washer-extractor, the washing method comprising at least one phase of washing the textiles to be washed during which the textiles to be washed are in contact with an aqueous washing composition comprising: - an enzymatic detergent detergent comprising at least one non-ionic detergent, at least one anionic detergent and at least one enzyme, and; - at least one alkaline detergent; characterized in that; the enzymatic detergent detergent has, in the aqueous washing composition, a mass proportion belonging to a value range extending from about 2 grams to about 6 grams of enzymatic detergent detergent per kilogram of dry soiled textiles to be washed, in that;the alkaline detergent has, in the aqueous washing composition, a mass proportion belonging to a value interval extending from around 3 grams to around 10 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, and in that; the washing process is carried out at room temperature and without the intentional addition of ozone.;

2. Method according to claim 1, characterized in that the aqueous washing composition comprises a degreasing detergent comprising at least one non-ionic surfactant, the degreasing detergent being used with a mass ratio, in the aqueous washing composition, of between the order of 1.0 grams and the order of 5.0 grams of degreasing detergent per kilogram of dry soiled textile(s).

3. Method according to any one of claims 1 or 2, characterized in that the aqueous washing composition further comprises a washing, disinfecting and bleaching detergent comprising peracetic acid, the washing, disinfecting and bleaching detergent having, in the aqueous washing composition, a mass proportion belonging to a value range extending from around 3.5 grams to around 4.5 grams of washing, disinfecting and bleaching detergent per kilogram of dry soiled textiles to be washed.

4. Method according to any one of claims 1 to 3, characterized in that it comprises a second subsequent washing phase during which the soiled textiles are in contact with a second aqueous washing composition comprising a washing, disinfecting and bleaching detergent comprising peracetic acid, the washing, disinfecting and bleaching detergent having in the aqueous washing composition a mass proportion belonging to a value range extending from around 3.5 grams to around 5.0 grams of washing, disinfecting and bleaching detergent per kilogram of dry soiled textiles to be washed.

5. Method according to any one of claims 1 to 4, characterized in that it comprises at least one initial phase of pre-washing the soiled textiles to be washed, each initial pre-washing phase being carried out at room temperature and without the voluntary addition of ozone.

6. Method according to any one of claims 1 to 5, characterized in that the enzymatic detergent detergent comprises from 5% to 15% of anionic surfactant and from 15% to 35% of non-ionic surfactants, the percentages being percentages by mass (m / m).

7. Method according to any one of claims 1 to 6, characterized in that the enzymatic detergent detergent comprises at least one hydrolase having an optimal activity temperature of less than 35°C.

8. Method according to any one of claims 1 to 7, characterized in that each enzyme of the enzymatic detergent detergent is chosen from the group formed by proteases having an optimal activity temperature of less than 35°C, amylases having an optimal activity temperature of less than 35°C, lipases having an optimal activity temperature of less than 35°C and cellulases having an optimal activity temperature of less than 35°C.

9. Method according to any one of claims 1 to 8, characterized in that the enzymatic detergent detergent comprises: - from 18% to 35% of polyethoxylated isotridecanol (CAS no. 69011-36-5), - from 5% to 10% of (2-methoxymethylethoxy) propanol (CAS no. 34590-94-8), - from 3% to 5% of sodium lauryl sulfate (CAS no. 85586-07-8), - at most 3% of sodium cumene sulphonate (CAS no. 15763-76-5), and - at least one enzyme having an optimum activity temperature of less than 35°C.

10. Method according to any one of claims 1 to 9, characterized in that the alkaline detergent comprises sodium hydroxide (NaOH) in a mass proportion of between 10% and 30%.

11. Method according to any one of claims 2 to 10, characterized in that the degreasing detergent comprises at least 60% by mass of ethoxylated alcohol(s) chosen from the group formed by: - 12-methyl-2-ethoxy-tetradecanol-1 (CAS 157627-86-6), - a composition of C12-C14 ethoxylated alcohols (CAS 68439-50-9), - a composition of C12-C15 ethoxylated alcohols (CAS 68131-39-5), - a composition of C12-C18 ethoxylated alcohols (CAS 68213-23-0), - a composition of C12-C16 ethoxylated alcohols (CAS 68551-12-2), and a composition of ethoxylated Ci2-Ci3 alcohols (CAS 160901-19-9).

12. Method according to any one of claims 3 or 4, characterized in that the washing, disinfecting and bleaching detergent comprises peracetic acid in a volume proportion of between around 5% and around 15%, acetic acid in a volume proportion of between around 10% and around 30% and hydrogen peroxide in a volume proportion of between around 10% and around 30%.