Roll paper as a fragrance control release system

Abstract

This invention provides a roll of paper, particularly a toilet paper roll, that also functions as a fragrance control and release system, solving the problems and shortcomings of conventional toilet paper rolls. [Solution] The present invention relates to a roll of paper that, in addition to its normal functions, also functions as a fragrance control release system. Furthermore, the present invention relates to a method for manufacturing a roll of paper, and to a household or consumer product including a roll of paper, such as a toilet paper roll.

Description

Technical Field

[0001] The present invention relates to a roll paper that, in addition to ordinary functions, further functions as a controlled fragrance release system. Furthermore, the present invention relates to a method for producing the roll paper, and to household or consumer products including the roll paper, such as toilet paper rolls.

Background Art

[0002] Air fresheners are consumer products that generally emit fragrance, and are used in small indoor areas such as homes, toilets, entrances, hallways, and vestibules, as well as large areas such as hotel lobbies, car dealerships, medical facilities, public arenas, and other large indoor spaces. Various types of air fresheners are commercially available, including liquid, gel, solid, diffuser, reed, plug-in, fan, and electric unit types.

[0003] It is particularly important to suppress unpleasant odors in bathrooms and toilets. In fact, specific air fresheners are manufactured for bathrooms and toilets as a source of fragrance.

[0004] However, commercially available air fresheners, particularly those designed for deodorizing toilets and urinals, contain chemical substances that can induce allergy or asthma symptoms or are toxic. Furthermore, since commercially available air fresheners randomly introduce fragrance into the air of indoor spaces as droplets that transfer fragrance to water vapor, they often give an unpleasant impression to people who enter a bathroom or toilet immediately after the air freshener is used.

[0005] Accordingly, there is a need for the development of other alternative means for releasing fragrance particularly in bathrooms and toilets.

[0006] One alternative is a toilet paper roll in which fragrance oil is impregnated into the inner side of the cardboard core of the toilet paper roll.

[0007] The drawback of these toilet paper rolls is that the fragrance is constantly released uncontrollably, leading in most cases to "over-intake" or "saturation" of fragrance into the air, often causing an unpleasant sensation for toilet or bathroom users. Thus, like common commercially available air fresheners, an excessively strong fragrance is released, followed by a decrease in intensity. From an economic standpoint, this alternative is unsatisfactory because it releases far more fragrance than is necessary to create a pleasant atmosphere. Furthermore, applying fragrance oil to the corresponding cardboard ribbon via a nozzle generally results in a kind of "fragrance cloud" that does not reach the ribbon. This fact not only represents a significant loss of material (fragrance oil) but also raises significant hygiene issues in the manufacturing plant. On the other hand, the use of impregnating cardboard tubes with fragrance oil is restricted because over-intake can reduce the structural integrity of the cardboard tubes. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2018-512469 [Overview of the project] [Problems that the invention aims to solve]

[0009] The overall objective of the present invention is to provide a roll of paper, particularly a toilet paper roll, that, in addition to its normal function as a toilet paper roll, also functions as a fragrance control release system that solves the problems and shortcomings of the toilet paper roll described above. [Brief explanation of the drawing]

[0010] [Figure 1] This diagram shows the toilet paper rolls of this embodiment and a comparison toilet paper roll installed in each cabin. [Modes for carrying out the invention]

[0011] The subject of this invention is a suspension comprising the following: (a) A microcapsule having a core material encapsulated within a microcapsule shell, wherein the core material contains at least one fragrance oil. (b) A liquid medium comprising or consisting of the following: (b1) at least one surfactant, (b) at least one type of fragrance oil, (b3) at least one coagulant remover, (b4) Water, and optionally (b5) Further auxiliaries and / or additives.

[0012] Surprisingly, toilet paper rolls containing the suspension according to the present invention have been found to enable controlled release of encapsulated fragrance, resulting in a certain reactivation of the fragrance in the room (bathroom and toilet). Thus, a lasting effect is achieved that brings freshness, cleanliness, and an inviting fragrance to the indoor space.

[0013] Furthermore, surprisingly, the suspension according to the present invention was found to exhibit not only high storage stability but also high stability under the conditions used in the manufacturing process of roll paper.

[0014] Furthermore, surprisingly, certain combinations of components in the suspension according to the present invention significantly reduce the technical problems observed in the manufacture of roll paper impregnated with fragrance oil. In particular, it has been found that reducing the resistance of the cardboard tubes can potentially halt the manufacturing process or adversely affect the cardboard of the toilet paper, as it may compromise the structural integrity of the cardboard as a whole or soften or interfere with the adhesive holding the cardboard tubes together.

[0015] Furthermore, it has surprisingly been found that combining specific components of the suspension with specific process conditions of the method for producing roll paper according to the present invention avoids clogging of the nozzles used for applying the suspension into the paper.

[0016] For the purposes of the present invention, all percentages are percentages by weight unless otherwise specified.

[0017] For the purposes of the present invention, a "slurry" within the meaning of the present invention is nothing other than a suspension of particulate core-shell microcapsules in water.

[0018] Preferably, the microcapsules (component (a)) are present in an amount of from about 10% by weight to about 30% by weight, based on the weight of the suspension. More preferably, the microcapsules (component (a)) are present in an amount of about 12% by weight, based on the weight of the suspension.

[0019] Preferably, the at least one surfactant (component (b1)) is present in an amount of from about 0.5% by weight to about 1.5% by weight, based on the weight of the suspension. More preferably, the at least one surfactant (component (b1)) is present in an amount of about 1% by weight, based on the weight of the suspension.

[0020] Preferably, the at least one fragrance oil (component (b2)) is present in an amount of from about 60% by weight to about 70% by weight, based on the weight of the suspension. More preferably, the at least one fragrance oil (component (b2)) is present in an amount of about 64% by weight, based on the weight of the suspension.

[0021] Preferably, the at least one aggregation inhibitor (component (b3)) is present in an amount of from 0.02% by weight to about 0.08% by weight, based on the weight of the suspension. More preferably, the at least one aggregation inhibitor (component (b3)) is present in an amount of about 0.05% by weight, based on the weight of the suspension.

[0022] Preferably, water (component (b4)) is present in an amount of from about 5% by weight to 30% by weight, based on the weight of the suspension. More preferably, water (component (b4)) is present in an amount of from about 10% by weight to 25% by weight, based on the weight of the suspension.

[0023] Accordingly, in a preferred embodiment, the suspension according to the present invention consists of: (a) microcapsules having a core material encapsulated within a microcapsule shell, wherein said core material comprises at least one fragrance oil in an amount ranging from about 10% by weight to about 30% by weight. (b) a liquid medium comprising the following, or consisting only of the following. (b1) at least one surfactant in an amount ranging from about 0.5% by weight to about 1.5% by weight. (b2) at least one fragrance oil in an amount ranging from about 60% by weight to about 70% by weight. (b3) at least one aggregation removing agent in an amount ranging from about 0.02% by weight to about 0.5% by weight; and optionally (b4) water in an amount ranging from about 5% by weight to about 30% by weight; and optionally (b5) further auxiliaries and / or additives. In each case, the proportion is based on the total weight of the mixture. provided that the components, together with other optionally selected typical adjuvants and / or additives, sum to 100% by weight.

[0024] In a particularly preferred embodiment, the suspension according to the present invention consists of: (a) microcapsules having a core material encapsulated within a microcapsule shell, wherein said core material comprises at least one fragrance oil in an amount of about 12% by weight. (b) a liquid medium, wherein the liquid medium consists of: (b1) at least one surfactant in an amount of about 1.0% by weight. (b2) at least one fragrance oil in an amount of about 64% by weight. (b3) At least one flocculant in an amount of approximately 0.05% by weight, and (b4) Approximately 10% to 25% by weight of water. In all cases, it is a ratio to the total weight of the mixture.

[0025] According to the present invention, fragrance oils are encapsulated in microcapsules and released in a controlled manner. The aroma function is initiated according to the “release on demand” principle, i.e., the capsules rupture upon mechanical contact, releasing the fragrance contained within. As used herein, “fragrance oil” consists of at least one fragrance compound. The term “fragrance oil” is well known to those skilled in the art, and there is no need to further specify these substances.

[0026] As used herein, “core-shell microcapsule,” or more generally “microcapsule,” or “capsule,” is a substantially spherical structure having a clearly defined core and a clearly defined envelope or wall. The “core” consists of any active substance or substance to be microencapsulated. The “wall” is the structure surrounding the active substance core to be microencapsulated. Generally, the wall of a microcapsule consists of a continuous polymer phase having an inner and outer surface. The inner surface is in contact with the microcapsule core. The outer surface is in contact with the environment in which the microcapsule exists. Ideally, the wall prevents degradation of the core due to the effects of oxygen, moisture, light, and other compounds or other factors (e.g., degradation due to acidic or basic pH values), limits the loss of volatile core substance, and releases the core substance under desired conditions. In this respect, the core-shell microcapsule of the present invention provides controlled release of active substance.

[0027] In this specification, "controlled release" refers to retaining the active material within the core until a specific triggering condition (friction in the present invention) occurs.

[0028] Therefore, according to the present invention, for example, when a toilet paper roll is not in use (i.e., when the toilet paper roll is not rotating on the support), the fragrance of the liquid suspension medium is released, creating a pleasant atmosphere in the room. However, each time the toilet paper is used, the cylindrical toilet paper roll rotates on the roll holder that supports it. Due to friction, the capsules burst, releasing the fragrance contained inside. As a result, the fragrance is reactivated in the room (bathroom and toilet) each time the toilet paper is used.

[0029] The encapsulation of active ingredients, such as fragrances, is known through prior art.

[0030] Two documents, WO 2006018694 A1 (FIRMENICH) and Germany 102008051799 A1 (HENKEL), describe suspensions of perfume microcapsules in aqueous solutions of mixtures of nonionic and cationic polymers.

[0031] WO 2013026657 A1 (UNILEVER) describes active substance particles whose outer surface is composed of nonionic polysaccharides, including hydroxypropyl guar, which is disclosed as a capsule wall component.

[0032] Core-shell capsules having a polycarboxylic acid capsule wall are known from WO 2014064255 A2 (Givaudan). The invention is the stabilization of capsules during storage in a medium at a specific pH.

[0033] For the purposes of the present invention, capsules are preferred in which the capsule wall is formed of polymers such as urea-formaldehyde polymer, melamine-formaldehyde polymer, phenol-formaldehyde polymer, urea-glutaraldehyde polymer, melamine-glutaraldehyde polymer, phenol-glutaraldehyde polymer, polyurea, polyurethane, polyacrylate, polyamide, polyester, epoxy crosslinked polymer, polyfunctional carbodiimide crosslinked polymer, silica, silica-derived materials, polysiloxane, polyimide, polyvinyl alcohol, polyanhydride, polyolefin, polysulfone, polysaccharides, proteins, polylactic acid (PLA), polyglycolide (PGA), polyorthoester, polyphosphazene, silicone, lipids, modified cellulose, gum, polystyrene, and combinations thereof. Other suitable polymer materials include ethylene maleic anhydride copolymer, styrene maleic anhydride copolymer, ethylene vinyl acetate copolymer, and lactide glycolide copolymer. Biopolymers and modified biopolymers obtained from alginates, chitosan, collagen, dextran, maltodextrin, and starch can also be used as encapsulation materials. Furthermore, microcapsules can be produced by simple or complex coacervation of maltodextrin. Preferred encapsulation wall polymers include those formed from isocyanates, acrylates, acrylamides, acrylate-co-acrylamides, hydrogel monomers, sol-gel precursors, maltodextrins, melamine-formaldehyde or urea-formaldehyde condensates, and similar types of aminoplasts. The aforementioned capsules are particularly preferred. Therefore, the use of these capsules has been observed to be particularly advantageous because these capsules exhibit remarkable stability under the conditions of roll paper production.

[0034] The preparation of the capsules is disclosed below: U.S. 6,586,107 B2, U.S. 2019 / 0134592A1, U.S. 2015 / 0210965A1, U.S. 2019 / 0358603A1, U.S. 2018 / 0049957A1, U.S. 2019 / 0062676A1, U.S. 2020 / 0129385A1, U.S. 9,631,165B2, WO2020 / 233773A1, US 2020 / 0216782A1, US 2011 / 0118161A1, US 2021 / 0127719A1, US 2021 / 0238510A1, WO2019 / 179597A1, WO2021 / 073775A1, US 2020 / 0253857 A1 and Europe 3512 626B1.

[0035] Particularly preferred is the use of formaldehyde-free capsules, such as those disclosed in European Publication No. 3512 626B1.

[0036] In a preferred embodiment, the microcapsules (component (a)) according to the present invention do not contain formaldehyde.

[0037] As already mentioned, the core material of the microcapsule consists of at least one fragrance oil. The selection of the fragrance oil to be encapsulated is not important in itself, but is determined solely by the desired application. The only limiting factors are that they must exist as oils or be sufficiently oil-soluble, i.e., lipophilic, to dissolve in the oil phase, and that the fragrance must not contain any components that affect the chemical properties of the core-shell microcapsule wall.

[0038] Suitable fragrances are well known to those skilled in the art, and there is no need to further specify these substances. However, suitable fragrances are described, for example, in U.S. 2021 / 0269739A1, WO2015 / 023961A1, U.S. 2014 / 0287008A1, U.S. 2018 / 0049957A1 and WO18050248 A1.

[0039] Preferably, at least the surfactant (component (b1)) consists of a nonionic surfactant. Furthermore, the surfactant may be low HLB, high HLB (hydrophilic-lipophilic), or a mixture thereof.

[0040] Preferably, the surfactant (component (b1)) is selected from the group consisting of polysorbate and ethoxylated hydrogenated castor oil ester (e.g., commercially available under trade names Chremophor®, ALPICARE®, EUMULGIN®, Polyoxyl 35) or mixtures thereof. Preferably, the polysorbate is selected from the group consisting of polyethylene glycol sorbitan monolaurate (Tween® 20, Croda Americas, Inc.), polyoxyethylene sorbitan monooleate (Tween® 80, Croda Americas, Inc.) or mixtures thereof.

[0041] In a preferred embodiment, the surfactant (component (b1)) is selected from the group consisting of polysorbates, particularly polyethylene glycol sorbitan monolaurate (Tween 20), polyoxyethylene sorbitan monooleate (Tween 80), or mixtures thereof.

[0042] In a particularly preferred embodiment, the surfactant (component (b1)) is polyoxyethylene sorbitan monooleate (Tween 80).

[0043] As described above, the liquid medium of the suspension also contains at least one fragrance oil (component (b2)). This / these fragrance oils may be the same as or different from the fragrance oil of the core material in the microcapsule. Therefore, the above description also applies to (component (b2)) of the liquid medium of the suspension.

[0044] As described above, the liquid medium of the suspension also includes at least one type of decoagulant (component (b3)). The decoagulant is a substance used to prevent the formation of aggregates. These substances are well known to those skilled in the art.

[0045] In a preferred embodiment, at least one decoagulant (component (b3)) is selected from the group consisting of humic acid and derivatives, alkaline lignosulfonates, tannin compounds, polyacrylates and acrylic derivatives, acrylate copolymers, cationic acrylamide copolymers, polycarbonates, sodium citrate, sodium carbonate and potassium carbonate, sodium hydroxide and potassium hydroxide, sodium silicate, sodium phosphate and potassium phosphate, cationic acrylamide copolymers, polycarbonates, sodium citrate, polysaccharides, sodium and potassium carbonates, sodium and potassium hydroxides, sodium silicates, phosphates and polyphosphates, sodium and ammonium oxalates, and mixtures thereof.

[0046] In a preferred embodiment, at least one decoagulant (component (b3)) is selected from the group consisting of polyacrylates and acrylic derivatives, acrylate copolymers, cationic acrylamide copolymers, polycarbonates, polysaccharides, tannins, silicates, and mixtures thereof.

[0047] In a particularly preferred embodiment, at least one de-coagulant (component (b3)) is selected from the group consisting of cationic modified polyacrylamide, acrylate copolymer, cationic acrylamide copolymer polycarbonate, polysaccharides, and mixtures thereof.

[0048] In a particularly preferred embodiment, at least one deaggregating agent (component (b3)) is selected from cationic modified polyacrylamide (Rheovis CSP @ 2.5% / W; BASF SE 67056 Ludwigshafen, Germany). This compound has been particularly effective in preventing the formation of aggregates that could lock up nozzles used for dispensing suspensions onto cardboard.

[0049] In a particularly preferred embodiment, the suspension according to the present invention does not contain formaldehyde.

[0050] For the purposes of the present invention, further auxiliary agents and / or additives include anti-dandruff agents, anti-irritation agents, irritation inhibitors, antioxidants, astringents, preservatives, antistatic agents, binders, buffers, carrier materials, chelating agents, cell stimulants, cleansing agents, care agents, softeners, emulsifiers, enzymes, fibers, film-forming agents, fixatives, foam-forming agents, foam stabilizers, anti-foaming substances, foam-forming agents, gelling agents, gel-forming agents, hair care agents, hair styling agents, hair straightening agents, hydrating agents, moisturizing substances, moisture-retaining substances, bleaching agents, strengthening agents, optical whitening agents, glossing agents, polymers, powders, proteins, re-oily agents, silicones, hair growth stimulants, coolants, skin coolants, and warming agents. The group can be selected from preservatives, skin warming agents, stabilizers, UV absorbers, UV filters, detergents, thickeners, vitamins, oils, waxes, fats, phospholipids, saturated fatty acids, monounsaturated or polyunsaturated fatty acids, monohydroxy acids, polyhydroxy fatty acids, liquefaction agents, dyes, color protectants, pigments, fragrances, polyols, surfactants, electrolytes, organic solvents, and silicone derivatives.

[0051] The present invention further relates to a method for producing the suspension disclosed above, comprising or consisting of the following steps: (a) A step of providing an aqueous solution of at least one flocculant and optionally at least one surfactant, (b) A step of providing an aqueous suspension of microcapsules, (c) A step of mixing the aqueous solution from step (a) and the suspension from step (b), (d1) A step of providing at least one fragrance oil, or (d2) Mixing at least one surfactant with at least one fragrance oil for about 10 to 20 minutes (wherein the mixture of step (c) does not contain a surfactant). (e) Combining at least one fragrance oil from step (d1) or the mixture from step (d2) with the mixture from step (c), and stirring the resulting composition for about 10 to about 30 minutes at a rotational speed ranging from about 400 to about 900 rpm.

[0052] Therefore, the method for producing the suspension according to the present invention offers two options, each consisting of the following steps, or only the following steps: Option 1 (The aqueous solution in step (a) contains a surfactant: The order of the processes is (a)-(b)-(c)-(d1)-(e). Second option (The aqueous solution in step (a) does not contain a surfactant): The order of the processes is (a)-(b)-(c)-(d2)-(e).

[0053] Preferably, step (c) is carried out at a rotational speed in the range of about 200 rpm to about 600 rpm, more preferably in the range of about 300 rpm to about 500 rpm, and most preferably in the range of about 350 rpm.

[0054] Preferably, step (c) is performed for about 2 to about 10 minutes, more preferably for about 4 to about 8 minutes, and most preferably for about 5 minutes.

[0055] Preferably, step (c) is carried out for about 5 minutes at a rotational speed in the range of about 350 rpm to ensure that a homogeneous mixture free of damaged microcapsules is obtained.

[0056] Preferably, step (d2) is carried out for a period of about 15 to 20 minutes.

[0057] Preferably, step (d2) is carried out at a rotational speed in the range of approximately 600 rpm to approximately 900 rpm.

[0058] In a preferred embodiment, step (d) is performed for about 15 to 20 minutes at a rotational speed in the range of about 600 rpm to about 900 rpm.

[0059] In a more preferred embodiment, step (c) is performed for about 5 minutes at a rotational speed in the range of about 350 rpm, and step (d) is performed for about 15 to about 20 minutes at a rotational speed in the range of about 600 rpm to about 900 rpm.

[0060] To carry out step (e), a suitable mixing paddle or blade is used. Such a suitable mixing paddle or blade is well known to those skilled in the art and does not need to be described in further detail.

[0061] A further subject of the present invention is a roll of paper containing the suspension disclosed above.

[0062] In a preferred embodiment, the inside of the roll paper is impregnated with the suspension disclosed above.

[0063] In a more preferred embodiment, the roll paper contains the suspension disclosed above in an amount of about 0.06 g / roll to 0.12 g / roll, more preferably 0.1 g / roll. This amount ensures the function of the roll paper as a fragrance-controlled release system and the durability of the cardboard tube under the manufacturing conditions of the roll paper.

[0064] In a preferred embodiment, the roll paper is a toilet paper roll.

[0065] The present invention further relates to a manufacturing method for producing the roll paper disclosed above. The manufacturing method includes, or consists of, the following steps: (a) A step of providing the suspension disclosed above. (b) A step of putting the suspension from step (a) into a tank and homogenizing the suspension. (c) A step of transferring a homogenized suspension to the pressure vessel, wherein the pressure vessel is connected to a nozzle or spray head by a line equipped with a filter. (d) A process of adjusting the air pressure inside the pressure vessel to an appropriate flow rate. (e) A step of applying the suspension to a cardboard ribbon via a nozzle or spray head so that only the sides of the cardboard ribbon are impregnated with the suspension. (f) A process for forming a cylindrical roll of paper.

[0066] In a preferred embodiment, step (b) is performed using a common process transfer method such as a pump or gravity.

[0067] In a preferred embodiment, step (c) is performed using a common liquid transfer method such as a pump, gravity, or pressure. Step (c) may optionally include additional filtering to remove foreign matter.

[0068] Preferably, the air pressure in step (d) is adjusted to about 1 to 5 bar, more preferably to about 1.5 bar, and most preferably to about 2.0 bar.

[0069] Preferably, the filters constructed using metal or inert plastic in the line are selected from the group consisting of 45-mesh, 50-mesh, 60-mesh, 70-mesh, 100-mesh, and 120-mesh filters. More preferably, they are selected from the group consisting of 60-mesh, 70-mesh, and 100-mesh filters. Most preferably, the filter in this line is a 70-mesh filter.

[0070] In a preferred embodiment, the nozzle diameter in steps (c) and (e) is 0.3 to 0.6 mm, more preferably 0.5 mm.

[0071] The nozzle of step (e) may contain certain elements inside in order to produce the desired spray ribbon pattern.

[0072] In a more preferred embodiment, the air pressure in step (d) is adjusted to approximately 2.0 bar (to achieve an appropriate flow rate), the filter in the line is a 70-mesh filter, and the nozzle diameter is 0.5 mm.

[0073] Surprisingly, a specific combination of parameters—not only the suspension composition, but also air pressure, filter, and nozzle diameter—is crucial to avoid nozzle lock-up when applying the suspension to cardboard. Furthermore, it turns out to be important for preventing the formation of the previously mentioned "fragrance cloud."

[0074] Furthermore, the method of the present invention also ensures that the suspension is uniformly applied to the roll paper, thereby enabling deodorization of bathrooms and toilets with maximum efficiency.

[0075] The present invention further relates to the use of the aforementioned roll paper as a fragrance-controlled release system.

[0076] Furthermore, the present invention relates to a household or consumer product made of the above-mentioned roll paper.

[0077] In a preferred embodiment, the household or consumer product is selected from the group consisting of toilet paper rolls, kitchen towels, and pre-moistened wipes.

[0078] In a particularly preferred embodiment, the household product or consumer product is a roll of toilet paper. [Examples]

[0079] The following embodiments further illustrate the present invention, but are not intended to limit its scope.

[0080] The performance of the toilet paper roll (TPR) according to this embodiment as a fragrance release system was evaluated in comparison with a comparative toilet paper roll (CTPR) characterized in that the inside of the cardboard roll of toilet paper is impregnated with fragrance oil, which is the result of a mixture of multiple free fragrance oils.

[0081] In this case, the free fragrance oil in the microcapsules in TPR (component (a)) is different from the free fragrance oil in the liquid medium (component (b)).

[0082] The fragrance composition of TPR and CTPR oils is identical. The amount of paper contained in TPR and CTPR is also the same.

[0083] The suspension according to this embodiment was impregnated into the inside of a cardboard roll of TPR toilet paper (0.1 g / roll). The TPR was packed into a sealed plastic bag and immersed at 25°C for 3 to 7 days.

[0084] The inside of the cardboard rolls of CTPR toilet paper were also impregnated with fragrance oil (0.1g / roll). The CTPR was placed in a sealed plastic bag and immersed at 25°C for 3 to 7 days.

[0085] Its performance was evaluated for pleasure and sensory characteristics over a week in a temperature-controlled cabin (25°C and 40°C).

[0086] The evaluation was conducted by having multiple testers (six experts) smell the environment inside the cabin and compare their impressions.

[0087] As shown in Figure 1, the TPR and CTPR were installed in the cabin.

[0088] The TPR and CTPR were placed in roll holders, and after waiting for 10 minutes inside the cabin, the cabin environment was evaluated (=Measurement 1).

[0089] Subsequently, TPR and CTPR were used, each taking the exact same amount of paper (used twice per day, with a 6-hour time interval between each use; 14 uses were evaluated).

[0090] Table 1 summarizes the results after evaluation: [Table 1]

[0091] From the data in Table 1, it can be seen that, before use (Measurement 1), the fragrance intensity in the case of CPTR was slightly stronger than that of TPR at both 25°C and 40°C.

[0092] However, once roll paper is used, the opposite result is observed. The intensity of the scent measured by PCR is significantly higher than in the case of CPCR.

[0093] In fact, it is observed that as the number of roll paper uses increases, the improvement in the efficiency of the roll paper according to the present invention compared to CPCR also increases (comparing the data from Measurement 7 and Measurement 14).

Claims

[Claim 1] (a) A microcapsule having a core material encapsulated within a microcapsule shell, wherein the core material contains at least one fragrance oil, (b) A liquid medium, (b1) at least one surfactant, (b) at least one fragrance oil, (b3) at least one type of flocculant, (b4) Water, and optionally (b5) Further auxiliary agents and / or additives, A liquid medium comprising, or consisting solely of, A suspension consisting of the following.

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