Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0065—Solid detergents containing builders
  • C11D17/0073—Tablets
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
  • D06M13/525—Embossing; Calendering; Pressing

Definitions

• Tablet comprising a compacted textile
• the present invention relates to a tablet intended to disintegrate at least partially in aqueous medium in order to release one or more active agents, said tablet comprising at least one textile in compacted form.
• Solid products for example in the form of tablets, capable of disintegrating in a liquid, are known, for example in the field of detergency, water treatment, fertilizers, etc. Indeed, the presentation of a product in solid form, or compact, has advantages: the product is easy to handle, store, dose. Thus, it will often be preferred to prepare a solid composition for storing one or more active agents that are to be released in an aqueous medium, for example water, to provide an active solution, for example suitable for cleaning or disinfecting, or also suitable for fertilize plantations or treat unsafe water. Solid products are generally less volume-intensive than liquid products and can therefore be stored more easily.
• a solid product intended to disintegrate in an aqueous medium is generally prepared from a starting mixture consisting of the various ingredients forming the composition of the product, the mixture then being pelletized, for example using a pelletizer, to obtain a product in solid form.
• the various ingredients are generally provided in the starting mixture in the form of powders or grains, sometimes liquids. Pelletizing, by applying a high pressure on the constituents of the mixture, agglomerates these different constituents together and a cohesive solid product is obtained.
• a solid product intended to disintegrate in an aqueous medium must therefore have good cohesion to prevent it from being crumbled, as well as good hardness, so that it can be kept in its integrity until it is used.
• such a solid product must have a hardness high enough not to arrive chipped or broken at the user.
• the solid products or tablets retain their cohesion, stability and good hardness during their storage time, these products must be able to release the active agent (s) they contain at the same time. the moment of their use, that is to say when they are put in contact with an aqueous medium, for example in a washing bath of a washing machine, or in the enclosure of a lava -dishes, or in a pool whose water must be treated, or in a volume of natural water that we seek to purify for example to make it drinkable.
• an aqueous medium for example in a washing bath of a washing machine, or in the enclosure of a lava -dishes, or in a pool whose water must be treated, or in a volume of natural water that we seek to purify for example to make it drinkable.
• disintegration is meant in the sense of the present application, a coarse separation of grains and / or powders, the actual dissolution step may occur simultaneously or later.
• Disintegration kinetics may vary depending on the desired action (s) for the product. For example, rapid disintegration may be required in the case of a product that is used for washing or smelling. Alternatively, one may want to vary the kinetics of disintegration if one wishes several sequential actions of the product, or an action for a fixed period, for example in the treatment of water in general.
• disintegration aid agents for example in the form of powders, may be incorporated in the starting mixture.
• Disintegration aid agents include so-called bursting agents. The bursting agents act by swelling, plastic deformation, wicking effect, when they come into contact with the aqueous medium in which it is desired to dissolve the product or the tablet.
• disintegration aid agents apart from their ability to assist in the disintegration of the product or the tablet, generally have little or no functional interest in the desired application for the product: they generally do not have detergent, biocidal, or other properties. These agents may also be releases which may be harmful to the environment and may induce filter clogging problems for some applications when they are insoluble in nature.
• the solid or tablet products must also preferably fulfill a number of physicochemical and mechanical criteria: in particular, these products must have good chemical stability throughout the storage phase, ie that is to say, be structured in such a way that no chemical reaction of decomposition, transformation, or otherwise can occur during the months of storage.
• solid or tablet products comprising several phases, for example a solid phase and a liquid phase, or a solid phase and a gel phase that is adhered to the phase solid, or even two solid phases.
• washing laundry it may also be desirable to have a solid product which will produce two separate effects, seq uenced or simultaneously simultaneously, but for example on different media. It would be interesting to have a product that can both clean the laundry during the wash cycle and capture dyes that may dye on the treated laundry. In the case where a washing-drying machine is used, it would be interesting to have a product capable both of cleaning the laundry during the washing cycle and able to remain in the drum of the machine at the time of drying of the machine. linen, for example to have a softening or antistatic action on the laundry drying.
• the present invention aims to remedy the above problems by providing a tablet usable in an aqueous medium, easy to manufacture and therefore industrializable, to overcome the presence of disintegration aid agents, and also allowing, if necessary to make combinations of constituents traditionally known to be difficult to combine, for example effective active agents when they are in liquid form.
• the present invention also provides a tablet which on the one hand comprises two solid phases allowing separate and / or sequenced actions, and on the other hand is perfectly cohesive and has excellent hardness.
• the present invention relates to a tablet intended to disintegrate at least partially in an aqueous medium in order to release at least one active agent, comprising at least a first solid phase comprising at least one pulverulent mixture in compacted form, said powder mixture comprising at least least said active agent, and at least one second solid phase, characterized in that said second solid phase comprises at least one textile in compacted form.
• the present invention relates in particular to a tablet intended to disintegrate at least partially in an aqueous medium in order to release at least one active agent, comprising at least a first solid phase comprising at least one pulverulent mixture in compacted form, said powder mixture comprising at least said active agent, and at least a second solid phase, characterized in that said second solid phase comprises at least one textile in compacted form, said textile in compacted form being able to swell with said aqueous medium in contact with the latter .
• the tablet according to the invention is in the form of a single product, comprising at least two cohesive solid phases resulting from the simultaneous compaction on the one hand of a starting powder mixture and on the other hand of a starting textile: thus, the first solid phase comprises at least one pulverulent mixture in compacted form, said powder mixture comprising at least said active agent, and the second solid phase comprises at least one textile in compacted form.
• the starting powder mixture is obtained by mixing ingredients in the form of powders, including the active agent (s), and optionally ingredients in liquid form, conventionally in the manufacture of solid compositions capable of disintegrating in an aqueous medium.
• the starting textile may be in the form of a textile already in compressed form, but having not yet undergone simultaneous compaction with a powder mixture.
• textile in compressed form will refer to a textile having already undergone a compression step, but only, ie independently of the step of simultaneous compaction with the starting powder mixture to obtain the tablet according to the invention.
• textile in compacted form will refer to a textile having undergone the step of compacting simultaneously with the starting powder mixture to obtain the tablet according to the invention.
• the term "textile in compacted form” means the textile in its final configuration, that is to say in the blast, when the textile express compressed form "designate the same textile, but in its configuration before compacting, as a starting product of the manufacture of the tablet according to the invention.
• the tablet according to the invention can be any solid product intended to be placed in contact with an aqueous medium in order to modify the composition of this the latter by means of its active agent (s), for example in order to use this modified aqueous medium as a cleanser, or in order to purify this aqueous medium in order to make it consumable, for example.
• the active agent can be chosen according to the desired action for the tablet.
• it can be selected from detergent agents, surfactants, bleaching agents, etc., for a cleaning action of the tablet, such as washing surfaces such as floors, walls, etc. , or washing clothes, or dishes.
• It may be chosen from disinfecting agents, antimicrobial agents and / or antibacterial agents for a pool water treatment action, or for purifying and / or purifying natural water from a well or a pond.
• tablette includes the terms tablet, lozenge, roller, etc.
• This tablet may have flat and convex upper and lower faces, concave or convex.
• This tablet can be indifferently general shape round, oval, square, rectangular, octagonal, polygonal.
• the tablet according to the invention although comprising two solid phases, one of which comprises or consists of one or more textiles in compacted form, retains a hardness conducive to good cohesion.
• the characteristics of cohesion and hardness are very sensitive parameters and difficult to preserve as soon as a new ingredient is introduced into a solid product formulation.
• the presence of the compacted form of the textile in the tablet according to the invention makes it possible to obtain a solid product with good cohesion and hardness equivalent to, or even greater than, conventional solid products which are generally free of any textile.
• the presence of a compacted form of textile in the tablet according to the invention does not weaken the cohesion of the latter and does not affect its ability to be pelletized.
• the tablet according to the invention although comprising a textile in compacted form, retains excellent cohesion and mechanical strength properties: thus, it can be handled, for example by machines during its packaging, or by consumers, at the time of use, without being damaged and while maintaining its integrity.
• the tablet according to the invention has a high hardness, even increased because of the presence of the textile or compacted form within the second solid phase of the tablet.
• the compacted form of the tablet according to the invention do not destabilize pelletizing and provides interesting hardness characteristics.
• the second solid phase of the tablet according to the invention may comprise several textiles in compacted form.
• the nature and the composition of the tablet according to the invention make it possible to overcome the presence in said tablet of bursting and / or effervescent agents.
• the compacted form of the textile by unfolding in contact with the aqueous medium in which the tablet is placed in contact or dive, acts as a disassembly aid for the tablet.
• the textile may swell with an aqueous medium, for example water, and its volume will increase: in particular, the compacted form of the textile will unfold to try to find its original form, generally substantially two-dimensional.
• This deployment of the textile will promote the separation of grains and / or powder ingredients of the first solid phase of the tablet according to the invention, and thus the disintegration of the latter.
• the first solid phase of the tablet according to the invention comprises a pulverulent mixture in compacted form, the powder mixture comprising at least one active agent intended to modify the composition of the aqueous medium in order to carry out the desired treatment.
• the active agent of the first solid phase of the tablet according to the invention may vary depending on the application envisaged for the tablet.
• this active agent is chosen from detergent agents, disinfecting agents, bleaching agents, bleaching catalysts, oxidizing agents, sequestering agents, fertilizing agents, pesticides, coagulating agents, flocculating agents, agents of cosmetic, nutritional or nutraceutical interest, chemical or biotechnological catalysts, dyes, and mixtures thereof.
• Detergent agents that may be mentioned include cationic surfactants, anionic surfactants, nonionic surfactants, zwitterionic surfactants and mixtures thereof.
• any chlorine derivative known to release active chlorine such as, for example, the sodium salt of N-chloro-4-methylbenzene sulphonamide in anhydrous form or dihydrate, the salt 1,3-dichloro-s-triazine-2,4,6-trione sodium salt in anhydrous form or dihydrate, and mixtures thereof.
• Bleaching agents that may be mentioned include sodium perborate mono and tetra hydrate, sodium carbonate peroxyhydrate, magnesium mono Southernsophalate xH 2 O, potassium monopersulfate, trichloroisocyanuric acid, sodium or potassium salts of hydrated dichloroisocyanurates or anhydrous, and mixtures thereof.
• sodium percarbonate an oxygen bleach
• TAED tetraacetylethylenediamine
• Sequestering agents that may be mentioned include salts and esters of phosphoric acid such as sodium tripolyphosphate, but also ethylene diamine tetraacetic acid (EDTA), sodium citrate, zeolites, nitrilotriacetic acid (NTA), tetrasodium salt of N, N-diacetic acid-L-glutamic acid (GLDA), methylglycine diacetic acid (MGDA), and mixtures thereof.
• salts and esters of phosphoric acid such as sodium tripolyphosphate, but also ethylene diamine tetraacetic acid (EDTA), sodium citrate, zeolites, nitrilotriacetic acid (NTA), tetrasodium salt of N, N-diacetic acid-L-glutamic acid (GLDA), methylglycine diacetic acid (MGDA), and mixtures thereof.
• EDTA ethylene diamine tetraacetic acid
• NDA nitrilotriacetic acid
• fertilizing agents mention may especially be made of phosphoric acid or oligomers of sodium phosphate, and mixtures thereof.
• divalent and trivalent cation salts in particular the aluminum and iron salts of oxidation state III, and mixtures thereof.
• acrylamide polymers such as "FLOPAM AM934" marketed by the company SNF.
• hydrophilic derivatives of vitamin E, vitamin C, retinol, hydroxystylbene derivatives and more specifically resveratrol, carotenoids, lycopene, isoflavonoids and more specifically isoflavones of soybeans probiotics in general and most particularly lactobacilli belonging to the family of lactobacillus casei and paracasei, bifidobacteria, pseudomonadaceae, antagonists of substance P and more specifically lanthanide salts, derivatives of dihydroxyethanolamine (DHEA), and their mixtures.
• DHEA dihydroxyethanolamine
• cereal preparations such as durum wheat sprouts, ground coffee, its lyophilized extracts in native or decaffeinated form, tea, soy isoflavones, and mixtures thereof.
• dyes include indigo, indigo-carmine, tartrazine, and mixtures thereof.
• the powdery mixture of the first solid phase may further comprise any other ingredient that can act as a carrier for the active agent at the first solid phase, and / or any ingredient useful for the intended application.
• the first solid phase can further comprise fillers, alkaline materials, enzymes, optical brighteners, bursting agents and any additive that can be used in tablets, such as for example one or more additives chosen from perfumes, dyes, lubricants, diluents, binders, defoamers, pelletizing aid agents, and mixtures thereof.
• the first solid phase may include bleaches or detergents for application as a laundry or dishwashing composition.
• the first solid phase may comprise fertilizing agents for application as a fertilizer.
• the first solid phase may include pesticides for crop protection.
• the first solid phase may comprise a chlorine releasing agent for tablet application for water disinfection.
• the tablet is used for washing laundry.
• the active agent may for example comprise one or more of the following compounds, alone or in combination, the proportions being given as a percentage by weight of the compound, relative to the total weight of the powder mixture:
• an oxygen bleaching agent pair and its catalyst for example consisting, on the one hand, of 5 to 25%, preferably 10 to 20%, of sodium percarbonate, and on the other hand from 0 to 10%, preferably from 1 to 5% of tetraacetylethylenediamine (TAED),
• TAED tetraacetylethylenediamine
• alkaline materials may be chosen from sodium carbonate, sodium bicarbonate and sodium silicate, and mixtures thereof,
• the enzymes may be chosen from amylase, protease, lipase, mananase, cellulase and mixtures thereof,
• optical brighteners from 0 to 5%, preferably from 0 to 2% optical brighteners.
• the powder mixture may further comprise from 0 to 20%, preferably from 10 to 15%, by weight, of bursting agents, based on the total weight of the powder mixture.
• the powder mixture may also comprise from 0 to 50%, preferably from 2 to 25%, by weight, of fillers, relative to the total weight of the powder mixture.
• Dyestuffs, perfume or pelletizing aid additives may be added in a range of 0 to 5%, preferably 0 to 2%, by weight, based on the total weight of the powder mixture.
• the powder mixture may also comprise ingredients in liquid form, such as surfactants, perfumes, essential hides, however in a limited amount so as not to generate the production disadvantages mentioned above.
• the second compacted solid phase of the tablet according to the invention comprises at least one textile in compacted form.
• the term "textile” means any arrangement of yarns, fibers, filaments, obtained by knitting, weaving or non-woven fabric such as paper.
• such an arrangement has the form of a flexible plate, provided with pores: for example, these pores are the spaces left between the threads, fibers and / or filaments constituting said arrangement, such as, for example, the stitches in the case of knitting.
• This flexible and porous plate is generally two-dimensional, that is to say it has a thickness well below its length and width. This two-dimensional flexible plate is generally easily deformable, particularly foldable on itself.
• the textile of the tablet according to the invention is selected from knits, woven fabrics, nonwovens, and combinations thereof.
• the term "textile in compacted form” means a textile which has undergone a step of simultaneous compaction with the powder mixture described above in order to obtain the tablet according to the invention. invention.
• the starting textile before said compacting step, may be a text already in compression.
• the expression "in compressed form" for the starting textile of the present application is understood to mean a textile, for example of initially two-dimensional initial shape, which has been folded as far as possible on the fabric itself in order to to give it a three-dimensional shape, with a thickness, a length and a width having respective values of the same order, and to which a compressive force has been applied such that the resulting compressed form is substantially free of pores and is in the form of a stable cohesive solid product in a medium such as ambient air (about 20 ° C) and in the absence of any external stress exerted against it.
• the compressed-form textile has the shape of a solid pellet of generally cylindrical shape, with a diameter ranging from 10 to 40 mm, for example 20 mm, and a height ranging from 5 to 20 mm, for example 10 mm.
• the weight of the pellet may for example vary from 1 to 5 g, for example may be 2.6 g.
• the textile of the tablet according to the invention preferably has a generally two-dimensional shape, such as a round, a rectangle, a square, or an oval.
• the textile has in the unfolded form the shape of a rectangle whose width is from 5 to 30 cm, for example is about 22 cm, and the length is from 5 to 30 cm, for example is about 25 cm.
• the dimensions of the textile in the unfolded state can be adapted according to the desired size for the final tablet.
• the density of the textile in compressed form is much higher than the density of the same textile in its initial configuration in uncompressed form, or in other words in the unfolded state, in the absence of stress exerted on this textile.
• Textiles in compressed form that can be used for manufacturing the second solid phase of the tablet according to the invention for example, a density ranging from 0.1 g / cm 3 to 2.5 g / cm 3 , preferably ranging from 0.7 to 1.2 g / cm 3 .
• the textile in compressed form that can be used for manufacturing the second solid phase of the tablet according to the invention can be chosen from textiles already existing under such a compressed form, as for example described in WO2010 / 025576.
• the compacted textile of the tablet according to the invention has, for example, a density ranging from 0.5 g / cm 3 to 5 g / cm 3 , preferably ranging from 0.5 g / cm 3 to 2.5 g / cm 3 .
• the textile of the tablet according to the invention has an absorbency ranging from 0.5 to 35%, preferably from 5 to 20%, by weight.
• the absorbency of a textile means the weight of liquid, for example water, absorbed by said textile, based on the weight of the absorbent textile used.
• the compacted form of the tablet textile according to the invention is intended to unfold in contact with the aqueous medium in which the tablet will be dipped: thus, when the textile in compacted form will come into contact with the aqueous medium, it will swell with aqueous medium, its volume will increase and it will unfold. While unfolding, it will contribute to the disintegration of the tablet.
• the textile of the tablet according to the invention comprises yarns, fibers and / or filaments of a material chosen from cellulose, cotton, polyester, nylon, linen, bamboo and their mixtures.
• the textile is in the form of an amalgam of cellulose fibers, such as paper.
• the yarns, fibers and filaments of the abovementioned materials have an absorbing power enabling the textile of the tablet according to the invention to act as a disintegration aid for the tablet when the latter is brought into contact with an aqueous medium.
• said material is cotton.
• the cotton has an absorbency of about 8.5% by weight: in other words, cotton fibers can absorb up to 8.5% of their weight in water.
• said material is linen. Flax has an absorbency of 12% by weight.
• said material is a cellulose, preferably a natural and biodegradable cellulose.
• biodegradable is meant within the meaning of the present application, a material able to decompose and disappear in a natural environment in a predetermined time, for example in less than six months.
• the textile consists solely of biodegradable material.
• the textile in the unfolded state once the tablet is dissolved in the aqueous medium, for example to discard.
• the textile when the textile is made of biodegradable material, it can be left in the natural environment until decomposition.
• the compacted form of the textile comprises at least one active compound in dry form.
• the compacted form of the tablet of the invention may contribute to the disintegration of the latter, but it can also participate in the desired action or actions for the tablet according to the application considered.
• the active compound in dry form may be chosen from the active agents mentioned above for the powdery mixture of the first solid phase.
• the active compound in dry form is more particularly chosen from active ingredients that are useful for applying the tablet as a cleaning product for the laundry to be used in a washing machine or a washing-drying machine.
• the active compound is chosen from surfactants, perfumes, anti-color transfer agents, softening agents, anti-static agents, deodorizing agents, bactericidal agents, fungicidal agents, disinfectants, and mixtures thereof.
• the active compounds may be incorporated into the textile intended to be used for the preparation of tablets according to the invention in liquid form before any compression and / or compaction of said textile, in other words in the initial unfolded state of the textile. So, before any compression, in other words in the unfolded state, the textile is impregnated with a solution of the desired active compound or compounds, and then the textile thus impregnated is compressed, as described in application WO2010 / 025576.
• the amount of solution used to impregnate the textile depends on the absorbency of the selected textile: generally, this amount ranges from 5 to 150 ml for a textile having dimensions such as those described above.
• the liquid phase of the active compounds is removed and the textile in compressed form obtained comprises the active compound (s) in dry form.
• the step of simultaneous compaction with the starting powder mixture of such a textile already in compressed form does not modify the dry state of the active compound (s) impregnating the textile .
• surfactants that can be used as active compounds for the textile of the tablet according to the invention, mention may be made of cationic surfactants, anionic surfactants, nonionic surfactants, zwitterionic surfactants, and mixtures thereof. .
• the anti-color transfer agents make it possible to absorb the dyestuffs of the detergent bath and to avoid their redeposition on the linen.
• anti-neck transfer agents which can be used as active compounds for the textile of the tablet according to the invention, mention may be made of N-substituted-hydroxy-haloalkyl quaternary ammonium salts such as 2-hydroxy-3 -chloropropyltrimethylammonium, salts of ammonium epoxy propyl such as epoxy propyl trimethylammonium chloride, quaternary ammonium compounds, polyamphotieri, quaternized starch derivatives, proteins, chitin, chitosan, chloride choline, polyvinyl amines, polyethylene imines, and mixtures thereof.
• N-substituted-hydroxy-haloalkyl quaternary ammonium salts such as 2-hydroxy-3 -chloropropyltrimethylammonium
• salts of ammonium epoxy propyl such as epoxy propyl trimethylammonium chloride
• quaternary ammonium compounds polyamphotieri, quaternized starch derivatives, proteins, chitin
• the softening agents make it possible to give the linen flexibility and to avoid it being rough.
• softening agents that can be used as active compounds for the textile of the tablet according to the invention, mention may be made of quaternary ammonium salts of cationic, anionic or amphoteric type, and mixtures thereof.
• Anti-static agents help to reduce and eliminate the accumulation of static electricity on laundry, especially during the drying phase.
• anti-static agents that can be used as active compounds for the textile of the tablet according to the invention, mention may be made of amine-based surfactants and amides with long aliphatic chains (sometimes ethoxylated), quaternary ammonium salts such as chloride cocamidopropyl betaine betahentrimoniu, phosphoric acid esters, polyethylene glycol esters, polyols and mixtures thereof.
• deodorizing agents that can be used as active compounds for the textile of the tablet according to the invention, mention may be made of cyclodextrin, sodium bicarbonate or a complex mixture of essential oils capable of neutralizing odors (tobacco, perspiration, animals, ). These active molecules can be encapsulated to maintain maximum efficiency for a specified time.
• the textile of the tablet according to the invention thus allows a prolonged presence of these molecules in the washing machine (several consecutive washings).
• Bactericidal, fungicidal and / or disinfectant agents help eliminate germs, fungi and bacteria when washing clothes.
• bactericidal, fungicidal and / or disinfectant agents that can be used as active compounds for the textile of the tablet according to the invention, mention may be made of sodium hypochlorite, hydrogen peroxide, ethanol or isopropanol, and mixtures thereof. .
• the active compound is a color antitransferant.
• the textile of the tablet according to the invention when the textile of the tablet according to the invention is in its unfolded state in the washing bath, it retains the dyes of the detergent bath and prevents their redeposition on the laundry.
• the active compound is a softening agent.
• laundry washing cycles in general comprise a first phase, washing itself and during which a detergent is used, followed by a second phase, rinsing, during from which the detergent is removed.
• the first phase generally has a duration ranging from 5 minutes to about 60 minutes, for example 10 minutes depending on the machines and programs used.
• the tablet disintegrates in general during the first 5 to 15 minutes of the cycle: the consequence is for example that the softening agent when it is present in these tablets, is released at the beginning of cycle. It can thus happen that the softening agent is prematurely and unnecessarily consumed at the time of washing. Furthermore, in a washer-dryer machine, the softening agent was removed with the drain water after rinsing. It can not therefore produce a softening effect on the laundry during the drying phase.
• One solution would be to open the machine after emptying, to introduce into the drum before drying a softening active, for example in the form of a dedicated softening tablet.
• this tablet having both a laundry action with a detergent asset present in the first phase solid tablet, and a softening action, thanks to a softening active compound present on the textile in compacted form, for example in encapsulated form for prolonged and / or delayed action.
• the tablet according to the invention thus makes it possible to eliminate a binding operation for the operator of the washing machine.
• the textile of the tablet according to the invention because of its nature and shape , is not discharged with the drain water after the rinsing step.
• the textile, with its softening agent remains in the drum of the washing machine.
• the textile of the tablet according to the invention releases its softening agent during the drying step of the machine.
• the active compound is a surfactant.
• a surfactant for example, it is possible to integrate in the tablet according to the invention. large amounts of compounds known to be active in liquid form. For example, it is thus possible to incorporate large amounts of surfactants initially in liquid form, or even perfumes or essential oils initially in liquid form.
• These active compounds are present in the dry state in the textile form. compacted, but they recover their liquid state when the textile absorbs the aqueous medium and returns to its unfolded state.
• said second solid phase comprises a plurality of textiles in compacted form.
• the second solid phase phase may consist of one or more textiles in compacted form.
• the content of the textile (s) in compacted form ranges from 2 to 20%, by weight, relative to the total weight of the tablet.
• the one or more textiles in compacted form can be distributed within said first solid phase.
• At least a portion of the second solid phase for example a portion of the textile in compacted form, is visible on at least one surface of said tablet.
• said visible portion of the compacted textile can come into contact with the aqueous medium as soon as the tablet is immersed in this aqueous medium.
• the compacted form of the textile can thus help disintegrate the tablet quickly.
• a first part of the second solid phase for example a first part of the textile in compacted form, is visible on the surface of a first face of the tablet
• a second part of the second solid phase for example a second part of the textile in compacted form or a second textile in compacted form, being visible on the surface of a second face of the tablet, opposite to said first face.
• the tablet may have the shape of a fairly flat cylinder of diameter D and height H, said second solid phase consisting of a compacted form of textile in the form of a pellet of height H and diameter d less than D, said pad being located in the center of the tablet: thus, the first solid phase forms a ring around said pad, the latter flush on the two opposite faces of the tablet.
• the first solid phase comprises a plurality of layers of different compositions.
• a first textile in compacted form is housed within a first layer of said first solid phase
• a second textile in compacted form being housed within a second layer of said first solid phase.
• the present invention also relates to a method for preparing a tablet as described above comprising the following steps:
• the compressive force is from 10 to 80 kN, for example from 20 to 50 kN, for a mass of starting powder mixture ranging from 10 to 60 g, for example 40 g, and for a textile under compressed form having for example the shape of a solid pellet of generally cylindrical shape, with a diameter ranging from 10 to 40 mm, for example 20 mm and a height ranging from 5 to 20 mm, for example 10 mm.
• the weight of the textile pellet in compressed form may, for example, vary from 1 to 5 g, for example maybe 2.6 g. It is thus possible to obtain a tablet in the form of a disk with a diameter ranging from 20 to 60 mm, for example 45 mm, and a height of 3 to 30 mm.
• the compressed form textile has a density ranging from 0.1 g / cm 3 to 2.5 g / cm 3 , preferably from 0.7 to 1.2 g / cm 3
• step c) said powder mixture is placed at the bottom of the matrix of the pelletizer in the form of a bed of powders, and then said textile is placed in compressed form on led it it of powders. After compacting, a tablet is obtained in which at least a portion of the second solid phase is visible on one side of the tablet.
• at least a portion of the compacted form textile is flush with the surface of a face of the tablet and may be directly in contact with the aqueous medium in which the tablet will be dipped during use.
• step c) a portion of said powder mixture is placed at the bottom of the matrix of the pelletizer in the form of a bed of powders, said textile is placed in compressed form on said bed of powders, then the remainder of said mixture is added powder on the said textile in compressed form. After compacting, a tablet is obtained in which all of the second solid phase is trapped in the first solid phase of the tablet.
• the first solid phase of the tablet comprises several layers
• a powder mixture is prepared separately for each desired layer.
• Each layer is then compacted in the pelletizer by applying a compressive force.
• the different layers can be made with or without precompression depending on the powders used as starting raw materials and depending on the desired compaction rate for these layers.
• a low precompression for example a force ranging from 0 to 30 kN, preferably from 5 to 20 kN, will be applied, with a holding time ranging from 0 to 30 seconds, in order to obtain uniform layers and a final tablet with no lack of adhesion between the different layers of the component.
• a compressed form textile may be introduced in one or more layers, in the same manner as previously described for the preparation of a monolayer tablet.
• the first solid phase of the tablet according to the invention may comprise several layers, one or more of these layers comprising at least a portion of the second solid phase in the form of a textile in compacted form.
• the first solid phase of the tablet according to the invention being constituted by three layers, two outer layers and an intermediate layer, a textile in compacted form is present in each of the outer layers, the intermediate layer being free of textile.
• the compacted form of textile of each outer layer is flush with the surface of the outer face of said layer.
• Tablets according to the invention have excellent hardness.
• the presence of a compacted form of textile does not destabilize pelletizing and does not affect the cohesion of the tablet obtained.
• - Figures 1 A-1 C are respectively views from above, from below and from the side of a first variant of the tablet according to the invention
• - Figures 2A-2C are respectively views from above, from below and from the side of a second variant of the tablet according to the invention
• -Figu res 3A-3C are respectively top, bottom and side views of a third variant of the tablet according to the invention.
• the powder mixture P of the following composition, indicated in Table I below, is prepared and suitable for an application of laundry detergent to the washing machine (the amounts are given as a percentage by weight, based on the total weight of the composition):
• the textile does not include any active compound.
• the pelletizer used is a press comprising a matrix and punches of "round diameter 45 mm" shape.
• the textile already in compressed form above is deposited in the matrix of the pelletizer in the central position. Then 40 g of the powder mixture P above is added to the matrix above the textile in compressed form. The upper punch of the pelletizer is then placed and the pelletizing cycle is started with a set point of 50 kN. During this step, the powder mixture P is compacted to form the first solid phase of the tablet. During this pelletizing step, the textile in compressed form is also compacted to form the second solid phase of the tablet: in this second solid phase, the textile is in compacted form.
• the compacted form of the textile has a density of
• the compacted form of the textile has a density multiplied by 26 relative to the density of the fabric in unfolded state prior to compression / compaction. Moreover, the textile in compacted form has a density almost multiplied by 1.5 (greater than about 56%) relative to the density of the textile in compressed form.
• the content of the textile in compacted form by weight, relative to the total weight of the tablet is: 6%.
• a biss according to the invention is obtained in the form of a fairly flat cylinder with a height of 1.9 cm.
• Such a tablet 1 is represented in FIGS. 1A-1C: the tablet 1 comprises a first solid phase 2 corresponding to the pulverulent mixture above in compacted form and a second solid phase in the form of the textile in compacted form 3.
• the first solid phase 2 is disposed around the textile in compacted form 3: however, a part 3a of the second solid phase, in other words the compacted form of textile 3, is visible on a surface 5 of the tablet 1, corresponding to the surface which was located opposite from the bottom of the pelletizer die.
• the tablet thus obtained has excellent hardness. It also has a very good cohesion, despite the presence of the compact form of textile 3.
• the compacted form of textile 3 comes into contact with this aqueous medium by its visible part 3a and swells with this aqueous medium. He then tends to return to its unfolded state and helps disintegrate the tablet.
• the compacted form of textile may comprise an active compound, which is released into the aqueous medium, will then act on this aqueous medium depending on the desired application.
• the compacted form of the textile has a density of
• the compacted form of the textile has a density multiplied by 20 relative to the density of the textile in the unfolded state prior to compression / compaction.
• the textile form The compacted mass has a mass density almost multiplied by 1.2 (about 20% higher) than the density of the textile in compressed form.
• the content of the textile in compacted form by weight, relative to the total weight of the tablet is: 6%.
• a tablet according to the invention is obtained in the form of a fairly flat cylinder of height 2.1 cm.
• Such a tablet 1 1 is shown in Figures 2A-2C: the tablet 1 1 comprises a first solid phase 12 corresponding to the pulverulent mixture above in compacted form and a second solid phase in the form of the compacted form of textile 13.
• the first solid phase 12 is disposed around the textile in compacted form 1 3 so that it completely traps and no part of said textile is visible outside.
• the tablet thus obtained has excellent hardness. It also has a very good cohesion, despite the presence of a compacted form of textile 13.
• the compacted form of the textile may comprise an active compound, which is then released into the aqueous medium, and will then act on this aqueous medium depending on the desired application.
• a tablet is produced according to the invention, comprising a first solid phase comprising three layers and a second solid phase comprising two textiles in compacted form as follows: A T1 textile already in compressed form as above is deposited in the matrix the pelletizer in a central position. Then 15 g of the powder mixture P1 above is added to the matrix above the textile in compressed form. The upper punch of the pelletizer is then placed and a pelletizing cycle is started with a setpoint of 9 kN.
• the upper punch is removed. This gives a first layer on which 10 g of P1 powder mixture is poured in order to form a bed of powders.
• the upper punch of the pelletizer is then placed on this bed of powders and a new pelletizing cycle is started with a set point of 9 kN.
• the upper punch is removed.
• a second layer is thus obtained on which 1 g of pulverulent mixture P2 is spread in order to form a bed of powders.
• a second textile T2 in compressed form as described above is deposited on this bed of powders.
• the upper punch of the pelletizer is then placed and a last pelletizing cycle is started with a set point of 50 kN.
• a tablet according to the invention is obtained in the form of a fairly flat cylinder of height 2.0 cm.
• Each textile in compacted form has a density of 1.2 g / cm 3 .
• each textile in compacted form has a density multiplied by 24 relative to the density of the textile in the unfolded state before compression / compacting.
• the compacted form of the textile has a density that is almost multiplied by 1.4 (about 44% higher) relative to the density of the textile in compressed form.
• the textile content in compacted form (including the two textiles T1 and T2) by weight, relative to the total weight of the tablet is: 1 1.
• the tablet 21 comprises a first solid phase 22 comprising three layers: a first outer layer 24 of composition P1 powder mixture, a second outer layer 25 of composition powder mixture P2, and an intermediate layer 26 of composition P1 powder mixture.
• the tablet 21 comprises a second solid phase 23 comprising two textiles in compacted form, the first textile T1 in compacted form 27 housed in the first outer layer 24, and the second textile T2 in compacted form 28 housed in the second outer layer 25.
• the first outer layer 24 traps the first textile in compacted form 27 leaving a portion 27a of said textile visible on the outer surface of this layer.
• the second outer layer 25 traps the second textile in compacted form 28 leaving a portion 28a thereof. second textile visible on the outer surface of this second layer.
• the intermediate layer 26 is textile-free.
• the tablet thus obtained has excellent hardness. It also has a very good cohesion, despite the presence of two textiles in compacted form.
• Textiles T1 and T2 in compacted form may comprise active compounds, for example different, which are released in the aqueous medium, will each act on this aqueous medium depending on the desired applications.

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• 2012
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