Process for industrial washing of common textiles

Abstract

The invention relates to a process for washing common textiles at room temperature moved in a rotary drum of a wringer washer, 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 laundry agent comprising at least one nonionic detergent, at least one anionic detergent and at least one enzyme, and; - at least one alkaline laundry agent; characterized in that: the enzymatic detergent laundry agent has, in the aqueous washing composition, a proportion of between 2 and 5 grams of enzymatic detergent laundry agent per kilogram of textiles to be washed, in that the alkaline laundry agent has, in the aqueous washing composition, a weight proportion of between 3 and 7 grams of alkaline laundry agent per kilogram of textiles to be washed, the aqueous washing composition comprises a degreasing laundry agent comprising at least one nonionic surfactant, the degreasing laundry agent being used with a weight ratio, in the aqueous washing composition, of between about 1.0 gram and about 5.0 grams of degreasing laundry agent per kilogram of dry soiled textile(s), and in that the washing process is carried out at room temperature. The invention relates to a process for washing common textiles that can be marginally improved by adding ozone gas.

Description

Description Title of the invention: Process for industrial washing of common textiles

[0001] The invention relates to the general field of washing, cleaning, disinfecting and / or bleaching of common textiles in an industrial washer-extractor, in particular the field of washing, cleaning, disinfecting and / or bleaching of textiles used in industry and / or in communities.

[0002] Industrial laundry processes and washing machine-type devices for implementing such processes are known, enabling soiled textiles, in particular soiled textiles, to be washed efficiently. Conventionally, in such industrial laundry devices and processes, 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 required disinfection levels.

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

[0004] Such heating, in particular such heating of the wash water, requires a significant input of heat energy for the wash water to reach such a temperature and for the textiles to be effectively washed and, where appropriate, disinfected.

[0005] Furthermore, such input of heat energy causes the production and subsequent release of carbon dioxide (CO2) into the atmosphere.

[0006] Furthermore, current French legislation requires that the temperature of used fluids discharged by such industrial washing installations must not exceed 30°C. To comply with these regulatory provisions, known industrial washing installations must provide specific means of storing and cooling used and hot fluids prior to their discharge.

[0007] The invention aims to overcome these drawbacks in combination by proposing an industrial textile washing process, in particular such a washing process including a disinfection process, which does not require heating the textiles to a high temperature of between 60°C and 80°C, nor does it require providing a specific installation for cooling used aqueous fluids before discharge.

[0008] 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 or industry or others), allowing at least a quantitative reduction of the bacterial flora of these textiles, satisfying the provisions of the AFNORNFT 72101 standard which provides that a disinfectant must reduce by a factor of 100,000 (10 5 ) the number of bacteria.

[0009] 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 one or more washing liquids 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.

[0010] 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, while providing advantages in terms of washing, bleaching the laundry, eliminating odors and reducing bacterial flora, nevertheless remain more complex than devices and methods without ozone, particularly with regard to the dosage and control of the quantity of ozone introduced into the washing machine.

[0011] Certain embodiments of the invention aim to overcome this drawback.

[0012] Certain embodiments of the invention aim 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 not requiring the voluntary addition of ozone, in particular gaseous ozone, to the textiles during the washing cycle of these textiles.

[0013] Certain embodiments of the invention therefore aim 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 substantially equal efficiency in washing textiles compared to a washing method comprising at least one voluntary addition of ozone.

[0014] Certain embodiments of the invention therefore aim 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.

[0015] Certain embodiments of the invention therefore aim to propose such an ozone-free washing method which does not require the use of an ozone generator or maintenance of such an ozone generator.

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

[0017] The invention aims to propose such a method for washing soiled textiles making it possible to reduce the duration of the washing cycle.

[0018] The invention therefore aims to propose a washing method, in particular a washing and disinfection method, for soiled textiles allowing not only a washing (i.e. at least partial removal, in particular satisfactory and usual removal of dirt) but also at least partial disinfection - in particular satisfactory and usual disinfection - of these soiled textiles.

[0019] The invention therefore aims to propose such a method for washing soiled textiles which does not require prior sorting of the soiled textiles according to a criterion of color or composition of these soiled textiles.

[0020] 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").

[0021] The invention thus aims to propose such a washing process implemented at room temperature, in particular implemented without intentional heating of aqueous pre-wash, wash or rinse compositions. The invention therefore aims to propose such a process for washing at room temperature common textiles, lightly or moderately soiled, without any particularly high expectations in terms of whiteness, odor or bacteriology and which is energetically optimized, in particular at the washing level.

[0022] The invention thus aims to propose such a washing method implemented at ambient 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.

[0023] 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.

[0024] 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.

[0025] 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, while ensuring greater longevity for such a device.

[0026] The invention thus aims to propose such a washing method which makes it possible to reduce the frequency of maintenance interventions.

[0027] The invention thus aims to propose such a washing process which allows optimal preservation of the quality of the washed textiles in comparison with known processes, in particular hot washing processes, and optimal preservation of their lifespan.

[0028] The invention thus aims to propose such a washing method making it possible to limit the wear of washed textiles.

[0029] The invention also aims to propose such a washing method making it possible to carry out a substantial saving of water required for its implementation compared to hot processes.

[0030] 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 necessary for washing the same quantity of the same type of textiles, compared to a washing process carried out at 40°C or 60°C.

[0031] The invention also aims to propose such a washing method allowing a reduction in the cycle duration, in particular by eliminating at least one rinsing cycle.

[0032] The invention also aims, and in particular, to propose such a method making it possible to obtain disinfection at a level at least equal to the level obtained by the industrial washing and disinfection methods of the prior art.

[0033] The invention also aims to propose such a method making it possible to obtain washing and disinfection at substantially the same level as the washing and disinfection obtained by methods of the prior art.

[0034] The invention also aims to propose such a method for reducing the residual alkalinity of washed, wet or dry textiles.

[0035] Thus, the invention aims to propose such a method capable of being implemented without even minor structural modification of a known industrial washer-extractor.

[0036] 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.

[0037] 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.

[0038] 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 corn- taken 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 range extending from of the order of 2 grams to of the order of 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 range extending from of the order of 3 grams to of the order of 10 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, in particular from of the order of 3 grams to of the order of 6 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, preferably from of the order of 3 grams to of the order of 4 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, in particular of the order of 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.,

[0039] According to certain embodiments, 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 about 1.0 grams and about 5.0 grams of degreasing detergent per kilogram of dry soiled textile(s).

[0040] 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 of this numerical value which produce, in the technical context considered, an effect of the same nature, if not of the same degree.

[0041] According to the invention, the soiled textiles can be of any type and origin. The washing method according to the invention is effective on any type of soiling. Generally speaking, it can be textiles soiled by at least one soiling that can come from various and varied origins. It can be textiles soiled with at least one particulate soiling, for example, particulate soiling caused by earth, soot or dust. These may be textiles soiled with at least one greasy soiling, in particular soiling from food, such as, for example, a stain from butter and / or oil and / or cream and / or an emulsion such as a mayonnaise stain and / or a seasoning dressing stain. These may be textiles soiled with at least one soiling from everyday life - such as a makeup or foundation stain. These may be textiles soiled with at least one enzyme-sensitive soiling, 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, fecal matter, etc.It may be an oxidizable stain 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. It may be textiles soiled by at least one stain provided by a lubricant such as an oil, in particular a mineral oil.

[0042] 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.

[0043] According to the invention, the detergents and their dosages are chosen so that the effectiveness of removing soiling from a soiled textile is at least equal to the effectiveness of removing soiling from a soiled textile, obtained by a process for washing textiles with ozone, carried out substantially with the same detergents and comprising at least one voluntary addition of ozone.

[0044] In certain embodiments, the washing method 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. In these embodiments, the method according to the invention does not require the use of a specific device for producing - in particular substantially extemporaneous production - ozone and for regulating the quantity and / or flow rate of ozone.

[0045] In certain embodiments of 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 certain embodiments of 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 prewash composition and / or in the aqueous rinsing composition. In certain embodiments of 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 certain embodiments of 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.

[0046] In a method according to the invention, at least one detergent is a detergent which is not sensitive to the presence of ozone, i.e. 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.

[0047] According to the invention, the method is implemented in a washer extractor. In such a process, 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.

[0048] According to the invention, the enzymatic detergent detergent is distinct from the alkaline detergent. According to the invention, the enzymatic detergent detergent is not alkaline. In some embodiments, the alkaline detergent is free of non-ionic detergent, in particular any non-ionic detergent. In some embodiments, the alkaline detergent is free of anionic detergent, in particular any anionic detergent. In some embodiments, the alkaline detergent is free of enzyme.

[0049] 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 about 1.0 grams and about 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 and the aqueous washing composition into contact), in particular of between about 1 gram and about 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 and the aqueous washing composition into contact aqueous washing), preferably at a rate of around 2.0 grams of degreasing detergent per kilogram of dry soiled textiles to be washed.

[0050] 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 5.0 grams of washing, disinfecting and bleaching detergent per kilogram (dry mass) of dry soiled textiles to be washed, preferably 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.

[0051] 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 grams of washing detergent,of disinfection and bleaching per kilogram of dry soiled textiles to be washed, preferably in the order of 4.0 grams of washing, disinfection and bleaching detergent per kilogram of dry soiled textiles to be washed.,

[0052] 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 with a dosage of around 4 grams of enzymatic detergent per kilogram of dry soiled textiles to be washed, - an alkaline sequestering 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 around 8 minutes and around 20 minutes, in particular a duration of between around 10 minutes and around 15 minutes. In certain embodiments, the washing phase having a duration of around 10 minutes. In certain other embodiments, the washing phase having a duration of around 15 minutes.

[0053] 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.

[0054] According to certain embodiments, each initial pre-wash phase is carried out at room temperature and without the voluntary addition of ozone.

[0055] 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 around 2 minutes and around 10 minutes, in particular a duration of around 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 grams of degreasing detergent per kilogram of dry soiled textiles to be washed.

[0056] According to some of these embodiments, the subsequent washing phase, carried out at room temperature, has a duration of between about 10 minutes and of the order of 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 of the order of 10 minutes and of the order of 15 minutes. Nothing prevents the provision of the washing phase 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.

[0057] 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, 11 A deliberate addition of at least one alkaline detergent is carried out in the aqueous washing composition impregnating the soiled textiles to be washed. In a washing process - in particular a washing and disinfection process - of textiles according to the invention, a deliberate addition of at least one degreasing detergent is carried out in the aqueous washing composition impregnating the soiled textiles to be washed. In a washing process - in particular a washing and disinfection process - of textiles according to the invention, a deliberate 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.

[0058] 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).

[0059] 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 an embodiment of 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, used with the same detergent(s) as the process according to the invention, but including a voluntary addition of ozone.

[0060] According to certain embodiments, at least one detergent is an enzymatic detergent 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).

[0061] 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. At least one enzyme, in particular at least one hydrolase - for example a hydrolase of bacterial origin - is effective at room temperature.

[0062] 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 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. According to certain embodiments, at least one enzyme of the enzymatic detergent detergent is chosen from the group formed by proteases effective at room temperature, amylases effective at room temperature, lipases effective at room temperature and cellulases effective at room temperature.,

[0063] In some embodiments, at least one anionic detergent of the enzymatic detergent detergent is a sodium sulfate, especially sodium lauryl sulfate (CAS No. 85586-07-8). In some embodiments, at least one anionic detergent of the enzymatic detergent detergent is a sulfonate, especially sodium cumene sulfonate (CAS No. 15763-76-5). In some embodiments, at least one anionic detergent of the enzymatic detergent detergent is selected from the group consisting of sodium sulfates, especially sodium lauryl sulfate (CAS No. 85586-07-8) and sulfonates, especially sodium cumene sulfonate (CAS No. 15763-76-5).

[0064] In some embodiments, at least one non-ionic detergent of the enzymatic detergent detergent is an ethoxylated alcohol, including an alcohol ethoxylated selected from the group consisting of polyethoxylated isotridecanol (CAS No. 69011-36-5) and (2-methoxymethylethoxy) propanol (CAS No. 34590-94-8).

[0065] 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), - 3% to 5% 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 by mass (m / m).

[0066] According to some of these embodiments, at least one of the detergents is the enzymatic detergent detergent proposed under the name “Garo®sive Deter” (Gâches Chimie, 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 composition), in particular at a rate of about 4 grams of enzymatic detergent detergent per kilogram of dry soiled textile(s).

[0067] The enzymatic detergent "Garo®sive Deter" is known for its use as an enzymatic detergent in an ozone washing process with a recommendation for use with a dosage of 2.5 to 3.5 g of "Garo®sive Deter" detergent per kilogram of dry laundry in a pre-washing step of such an ozone washing process of textiles in a washing tunnel.

[0068] 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.

[0069] According to some of these embodiments, the alkaline detergent is the sequestering alkaline detergent proposed under the name "GARO®BOOST" (Gâches Chimie, 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 soiled textile(s) before bringing the soiled textile(s) into contact with the aqueous 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.

[0070] 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.

[0071] 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).

[0072] According to some of these embodiments, 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 Ci2-Cis ethoxylated alcohols (CAS 68213-23-0), - a composition of ethoxylated alcohols in Ci2-Ci6 (CAS 68551-12-2), and - a composition of C12-C13 ethoxylated alcohols (CAS 160901-19-9).

[0073] 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 C12-C14 ethoxylated alcohols (CAS 68439-50-9), - a composition of C12-C15 ethoxylated alcohols (CAS 68131-39-5), - a composition of Ci2-Cis ethoxylated alcohols (CAS 68213-23-0), - a composition of ethoxylated alcohols in Ci2-Ci6 (CAS 68551-12-2), and - a composition of C12-C13 ethoxylated alcohols (CAS 160901-19-9).

[0074] According to some of these embodiments, the degreasing detergent is the detergent- degreasing agent for ozone process, proposed under the name MULAN EXTREME" (Christeyns France SA, Vertou, France). According to some of these embodiments, the degreasing agent "MULAN EXTREME" is used with a mass ratio of between about 1.0 grams and about 3.0 grams of degreasing agent 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 composition), in particular at a rate of about 2.0 grams of degreasing agent per kilogram of dry soiled textile(s).

[0075] 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 F isotri decanol (CAS no. 69011-36-5); - a composition of C12-C13 ethoxylated alcohols (CAS 160901-19-9); - 3-butoxy-2-propanol (CAS 5131-66-8-19-9).

[0076] According to certain other of these embodiments or in combination, the degreasing detergent comprises: - of polyethoxylated isotridecanol (CAS no. 69011-36-5) in a mass proportion of at least 60%; - a composition of C12-C13 ethoxylated 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%.

[0077] 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).

[0078] According to some of these other embodiments, the degreasing detergent is the degreasing detergent for ozone process, proposed under the name "COOL STAR" (Christeyns France SA, Vertou, France). According to some of these other embodiments, the degreasing detergent "COOL STAR" is used with a mass ratio of between about 4.0 grams and about 6.0 grams of degreasing detergent "COOL STAR" added per kilogram of dry soiled textile(s), in particular at a rate of about 2.0 grams of degreasing detergent "COOL STAR" per kilogram of dry soiled textile(s).

[0079] In some embodiments, at least one of the detergents is a washing, disinfecting and bleaching detergent. In some of these embodiments, the washing, disinfecting and bleaching detergent comprises peracetic acid. In some of these embodiments, the detergent washing, disinfecting and bleaching agent 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 agent 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 agent 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 agent 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%.

[0080] According to some of these embodiments, at least one washing, disinfecting and bleaching detergent is a peracetic acid composition, in particular a peracetic acid composition in a mass proportion of between around 5% and around 15%, preferably around 15%. According to some of these embodiments, the peracetic acid composition 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) and the washing composition into contact), 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.

[0081] 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.

[0082] According to certain embodiments, said washing composition is free sodium hypochlorite (NaCCO or "bleach"). However, according to certain particular embodiments, in particular according to certain methods of implementing a textile washing process requiring intensive washing of particularly dirty, soiled, stained or even bacteriologically contaminated textiles, nothing prevents the addition of bleach to the aqueous washing composition, the textile washing process being carried out 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).

[0083] 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.

[0084] According to some of these embodiments, the pre-wash phase at room temperature comprises at least one pre-wash step chosen from the group consisting of: - 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 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-washing step during which soiled textiles to be washed are in contact with an aqueous pre-washing 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 be washed, - 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 -notam- ment of the order of 3.5 grams of alkaline strengthening detergent per kilogram of dry soiled textiles to be washed.

[0085] According to some of these embodiments, the room temperature pre-wash phase comprises 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 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 2.0 grams and 4.0 grams - in particular 3.0 grams - of degreasing booster detergent per kilogram of dry soiled textiles to be washed, and - at least one alkaline booster detergent with a dosage of alkaline booster detergent of between about 3.0 grams and about 4.0 grams - in particular about 3.5 grams - of alkaline booster 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.

[0086] 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.

[0087] 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 strength (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 a medium hydrotimetric strength (TH), in particular between 15°f and 25°f for which softening treatment is desirable. It may be water with a high hydrotimetric strength (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 above 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.

[0088] 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 different characteristics mentioned above or below must not be considered as closely or inextricably linked to each other, the invention being able to relate to only one of these structural or functional characteristics, or only part of these structural or functional characteristics, or only part of one of these structural or functional characteristics, or any grouping, combination or juxtaposition of all or part of these structural or functional characteristics.

[0089] Other aims, characteristics and advantages of the invention will appear on reading the following description, drawings and illustrative examples of certain possible but non-limiting embodiments of the invention, in which:

[0090] [Fig 1] Figure 1 alone is a flowchart representative of a particular embodiment of a room temperature washing method according to the invention.

[0091] 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 20 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 15 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, 15 washed, rinsed and spun textiles are removed from the drum of the industrial washer extractor.

[0092] SOIL REMOVAL - Evaluation of the washing efficiency of soiled textiles. Each tested process for 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 soil removal is determined spectrophotometrically using a light reflectance device. The removal efficiency (E, %) of the soil considered is determined according to formula (I) below:

[0093] [Math 1] W - Rn E = x lOO Rb - Rn in which: - E represents the percentage of removal of a stain from the corresponding stain test piece, - RC 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 specimen 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.

[0094] 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.

[0095] Impregnated soils on multi-soiling test specimens 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-applied 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 specimen and fixed by air drying. They correspond to less demanding soiling conditions than impregnated soils.

[0096] 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, enzymatic detergent detergent “GARO®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of “GARO®STVE DETER” detergent per kilogram of dry soiled textiles to be washed and “GARO®BOOST” sequestering alkaline booster detergent (Gâches Chimie, France) at a dosage of 4 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed, - a third phase, of washing in a second bath at room temperature and in the presence of a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15%, used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, and - a fourth phase, rinsing the washed textiles.

[0097] The average washing efficiency (E, %) of impregnated soiling, analyzed on the basis of each soiling sample washed at room temperature according to the invention is given in Table 1 below. The uncertainty on these measurements is 5%: [Table 1]

[0098] The "White Prewash" washing process at room temperature for textiles stained with impregnated dirt allows for high washing efficiency.

[0099] 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 program ("Color Prewash") 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 anti-foam additive, enzymatic detergent “GARO®SIVE DETER” (Gâches Chimie, France) at a dosage of 2 grams of “GARO®STVE DETER” detergent per kilogram of dry soiled textiles to be washed, “GARO®BOOST” sequestering alkaline booster detergent (Gâches Chimie, France) at a dosage of 3.5 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and “MULAN EXTREME” degreasing booster detergent (Christeyns France SA, Vertou, France) at a dosage of 2 grams of “MULAN EXTREME” detergent 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 comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0100] The average washing efficiency (E, %) of impregnated soils, analyzed on the basis of each soiling specimen washed at room temperature, is given in Table 2 below. The uncertainty on these measurements is 5%: [Table 2]

[0101] 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 washing efficiency.

[0102] EXAMPLE S A third 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 ("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 anti-foam additive, enzymatic detergent “GARO®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of “GARO®STVE DETER” detergent per kilogram of dry soiled textiles to be washed and “GARO®BOOST” sequestering alkaline booster detergent (Gâches Chimie, 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 comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0103] The average washing efficiency (E, %) of surface soiling, analyzed on the basis of each soiling sample washed at room temperature is given in Table 3 below. The uncertainty on these measurements is 5%: [Table 3]

[0104] The "White Prewash" washing process for textiles stained with surface soiling at room temperature provides high washing efficiency.

[0105] 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 anti-foam additive, enzymatic detergent “GARO®SIVE DETER” (Gâches Chimie, France) at a dosage of 2 grams of “GARO®STVE DETER” detergent per kilogram of dry soiled textiles to be washed, “GARO®BOOST” sequestering alkaline booster detergent (Gâches Chimie, France) at a dosage of 3.5 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and “MULAN EXTREME” degreasing booster detergent (Christeyns France SA, Vertou, France) at a dosage of 2 grams of “MULAN EXTREME” detergent 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 comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0106] 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 are given in Table 4 below. The uncertainty on these measurements is 5%: [Table 4]

[0107] The “Color Prewash” washing process at room temperature for textiles stained with superficial soiling provides high washing efficiency.

[0108] EXAMPLE S 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®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of detergent “GARO®STVE DETER” per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Gâches Chimie, France) at a dosage of 3.0 grams of detergent “GARO®BOOST” per kilogram of textiles dry soiled textiles to be washed and a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0109] The average washing efficiency (E, %) of impregnated soils, analyzed on the basis of each soiling sample washed at room temperature is given in Table 5 below. The uncertainty on these measurements is 5%: [Table 5]

[0110] The "White" room temperature washing process for white textiles provides high washing efficiency. [OR I] 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®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of detergent “GARO®STVE DETER” per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Gâches Chimie, France) at a dosage of 3.0 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and of a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0112] The average washing efficiency (E, %) of surface soiling, analyzed on the basis of each soiling sample washed at room temperature are given in Table 6 below. The uncertainty on these measurements is 5%: [Table 6]

[0113] The "White" washing process at room temperature for white textiles with superficial stains provides high washing efficiency.

[0114] EXAMPLE ? 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®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of detergent “GARO®STVE DETER” per kilogram of dry soiled textiles to be washed, sequestering alkaline booster detergent “GARO®BOOST” (Gâches Chimie, France) at a dosage of 3.0 grams of detergent “GARO®BOOST” per kilogram of dry soiled textiles to be washed and a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, - a rinsing phase for washed textiles.

[0115] The average efficiency (E, %) of washing impregnated dirt, analyzed on the basis of each soiling sample washed at room temperature according to the method of the invention is given in Table 7 below. The uncertainty on these measurements is 5%: [Table 7]

[0116] The "White" room temperature washing process for white textiles provides high washing efficiency.

[0117] EXAMPLE S 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 textile load 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 ("Prewash White Wash") for the prewash / wash 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®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of “GARO®SIVE DETER” detergent per kilogram of dry soiled textiles to be washed, of sequestering alkaline booster detergent “GARO®BOOST” (Gâches Chimie, France) at a dosage of 3.5 grams of “GARO®BOOST” detergent per kilogram of dry soiled textiles to be washed and a detergent and emulsifying detergent “MULAN EXTREME” (Christeyns France SA, Vertou, France) at a dosage of 3.0 grams of “MULAN EXTREME” detergent per kilogram of dry soiled textiles to be washed, - a second washing phase lasting 10 minutes in a bath at room temperature and in the presence of a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, - a third washing phase lasting 5 minutes in a bath at room temperature and in the presence of the bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 3 grams of bleaching and disinfecting agent 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.

[0118] For the purpose of comparing a process according to the invention at room temperature reproduced three times, the same process “Prewash White Wash” is compared to: - a washing process carried out at 40°C, and - a standard process implemented at 60°C.

[0119] The comparative washing process implemented at 40°C includes: - 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 “MU-LAN 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% non-ionic surfactant and less than 5% 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.

[0120] The comparative washing process implemented at 60°C includes: - 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 a bleaching and disinfecting agent comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 8 grams of bleaching and disinfecting agent 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 emptying phase lasting 30 seconds, - a fifth rinsing phase lasting 3 minutes, - a sixth emptying phase lasting 30 seconds, - a seventh rinsing phase lasting 3 minutes, and - a final spin phase lasting 8 minutes.

[0121] The average washing efficiency (E, %) of impregnated soils according to the “Prewash White Wash” process and according to the comparative washing processes at 40°C and 60°C, analyzed on the basis of each washed soil test piece are given in Table 8 below. The uncertainty on these measurements is 5%: [Table 8]

[0122] The "Pre-wash White Wash" room temperature washing process for white textiles provides washing efficiency at least as high as comparative reference processes implemented by heating to a temperature of 40°C and 60°C.

[0123] 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 test piece is given in Table 9 below. The uncertainty on these measurements is 5%: [Table 9]

[0124] The "Pre-Wash White Wash" room temperature washing process for white textiles provides washing efficiency comparable to that of comparative reference processes implemented by heating to a temperature of 40°C and 60°C.

[0125] The average washing efficiency (E, %) 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: [Table 10]

[0126] 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.

[0127] 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 one embodiment of the invention is analyzed with respect to three distinct germs representative of spore-producing bacteria, molds and pathogenic bacteria.

[0128] 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 anti-foam additive, enzymatic detergent “GARO®SIVE DETER” (Gâches Chimie, France) at a dosage of 4 grams of “GARO®SIVE DETER” detergent per kilogram of dry soiled textiles to be washed and “GARO®BOOST” sequestering alkaline booster detergent (Gâches Chimie, 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 comprising peracetic acid in a mass proportion of between 5% and 15% used with a dosage of 4 grams of bleaching and disinfecting agent per kilogram of dry soiled textiles to be washed, and - a fourth phase of rinsing the washed textiles.

[0129] After washing, samples are taken from the seeding area to assess the disinfection effectiveness of the washing process on the deposition area. A count is performed 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 that comply with regulatory standards.

[0130] 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.

Claims

Claims

1. A method of washing common 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 range extending from about 3 grams to about 10 grams of alkaline detergent per kilogram of dry soiled textiles to be washed, 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 about 1.0 grams and about 5.0 grams of degreasing detergent per kilogram of dry soiled textile(s), and in that; the washing process is carried out at room temperature.;

2. Method according to claim 1, characterized in that the washing process is carried out without the intentional addition of ozone.

3. Method according to any one of the preceding claims, 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 about 3.5 grams to about 5.0 grams of washing, disinfecting and bleaching detergent per kilogram of dry soiled textiles to be washed.

4. Method according to any one of the preceding claims, 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 the preceding claims, 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 temperature.

6. A method according to any one of the preceding claims, 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 the preceding claims, 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 the preceding claims, 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 the preceding claims, 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), - 3% to 5% sodium lauryl sulfate (CAS no. 85586-07-8), - at most 3% sodium cumene sulfonate (CAS No. 15763-76-5), and - at least one enzyme with an optimal activity temperature below 35°C.

10. Method according to any one of the preceding claims, 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: - 12-methyl-2-ethoxy-tetradecanol-l (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 ethoxylated Ci2-Cis alcohols (CAS 68213-23-0), - a composition of ethoxylated alcohols in C12-C16 (CAS 68551-12-2), and a composition of ethoxylated alcohols in C12-C13 (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%.

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