Wick and method for treating a wick

Abstract

The present invention relates to a wick comprising a wick material, the wick material being selected from the group consisting of cotton, cellulose wool, cellulose fibers, paper yarn, linen yarn or combinations thereof; and a first additive, the first additive being selected from the group consisting of peroxy compounds, peroxo compounds and / or peroxides.

Description

[0001] Wick and method for treating a wick

[0002] The present invention relates to a wick and a candle comprising a wick according to the invention. Furthermore, the invention relates to a method for treating a wick with an impregnation solution and the use of an impregnation solution for impregnating a wick.

[0003] Wicks for candles must combine several properties. On the one hand, they must exhibit good burning behavior, but not burn out too quickly. On the other hand, the angle of curvature of the wick must be within a specified range to produce appropriate flame sizes and shapes.

[0004] To achieve these properties, various substances are added to the wicks that influence their burning behavior. The interaction of all components is crucial to obtaining a wick with the appropriate curvature and favorable burning behavior.

[0005] Boron-containing substances such as boric acid, borates, or even borax are known to be used as flame retardants. These substances promote favorable burning behavior of the wick. The wick also has a favorable curvature.

[0006] However, borates, and especially borax, can have negative health effects and are classified as toxic to reproduction. This means that wicks impregnated, or soaked, with such substances are no longer desirable.

[0007] It is therefore of interest to provide wicks and methods for treating wicks that are harmless to health, yet still exhibit the advantageous burning and curvature properties of conventional wicks containing boron, and in particular borates. The object of the present invention is therefore to provide wicks with good burning properties and good curvature behavior. Furthermore, it is desirable for the wicks to be free of boron-containing substances.

[0008] The present object is achieved by the wick according to the invention as defined in claim 1. Furthermore, the present invention relates to candles according to claim 9 comprising the wick according to the invention. Furthermore, the invention relates to a method for treating a wick as defined in claim 11 and the use of an impregnation solution for treating a wick as defined in claim 12.

[0009] In a first aspect, the invention relates to a wick comprising a wick material, wherein the wick material is selected from cotton, rayon, cellulose fibers, paper yarn, linen yarn, or combinations thereof; and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds, and / or peroxides.

[0010] Peroxy compounds within the meaning of the invention are carboxylic acid derivatives and their salts of the general formula R-CO-OOH, such as peroxyacetic acid or perbenzoic acid; the corresponding salts are also included.

[0011] Peroxo compounds within the meaning of the inventions are compounds, in particular acids and their salts, in which the O2 2-ion ​​acts as a ligand, or those in which the -O group is replaced by the -OO group. Peroxoacids are derived from corresponding oxoacids by partial or complete replacement of the oxygen atoms with peroxo groups; these include, for example, peroxomonosulfuric acid, HO3S-OOH, and peroxodisulfuric acid, HO3S-OO-SO3H, as well as their salts, and also peroxochromates.

[0012] Peroxides are compounds that contain the peroxide anion O2 2 -ion ​​or the divalent -O- O- group (peroxo group); the oxygen atoms in the peroxide ion have the oxidation state -1 . The wick consists of a wick material. This wick material forms the

[0013] Base material and is soaked with an impregnation solution.

[0014] Preferably, the wick is obtained by treating a wick material with an impregnation solution.

[0015] The wick according to the invention is characterized by its balanced burning behavior. On the one hand, the wick forms a good curve, and on the other hand, it does not stick, allowing multiple relightings.

[0016] According to one embodiment, the first additive is selected from the group consisting of peroxo compounds and / or peroxy compounds, and preferably it is selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid, peroxybenzoic acid, peroxyacetic acid, performic acid or combinations thereof.

[0017] According to a further embodiment, the first additive is selected from the group consisting of inorganic or organic peroxo compounds, and preferably it is an inorganic peroxo compound.

[0018] In a further embodiment, the first additive is a peroxo compound selected from the group consisting of salts of organic and inorganic peroxo acids, preferably selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid or combinations thereof and more preferably disodium peroxodisulfate, dipotassium peroxodisulfate, sodium peroxomonosulfate, potassium peroxomonosulfate, ammonium peroxomonosulfate or combinations thereof.

[0019] Preferably, the first additive is pentapotassium bis(peroxomonosulfate) bis(sulfate). According to one embodiment, the proportion of the first additive is less than 10 wt.%, preferably less than 1.0 wt.%, and more preferably less than 0.1 wt.%, based on the total weight of the wick.

[0020] According to a further embodiment, the proportion of first additive is 0.00001 to 10 wt.%, preferably 0.0001 to 1.0 wt.% and more preferably 0.001 to 0.1 wt.% based on the total weight of the wick.

[0021] In one embodiment, the wick comprises an inorganic sulfate, preferably an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate, and calcium sulfate, and more preferably potassium sulfate; and / or the wick comprises an inorganic hydrogen sulfate, preferably lithium hydrogen sulfate, beryllium hydrogen sulfate, sodium hydrogen sulfate, ammonium hydrogen sulfate, aluminum hydrogen sulfate, magnesium hydrogen sulfate, potassium hydrogen sulfate, and calcium hydrogen sulfate, and more preferably potassium hydrogen sulfate.

[0022] According to one embodiment, the proportion of inorganic sulfate is from 0.00001 to 1 wt.%, preferably 0.0001 to 0.5 wt.% and more preferably 0.001 to 0.25 wt.% based on the total weight of the wick.

[0023] According to a further embodiment, the proportion of inorganic hydrogen sulfate is from 0.00001 to 1 wt.%, preferably 0.0001 to 0.5 wt.% and more preferably 0.001 to 0.25 wt.% based on the total weight of the wick.

[0024] In one embodiment, the proportion of inorganic sulfate is less than 1 wt.%, preferably less than 0.5 wt.%, more preferably less than 0.25 wt.% and even more preferably less than 0.05 wt.% based on the total weight of the wick.

[0025] In a further embodiment, the proportion of inorganic hydrogen sulfate is less than 1 wt.%, preferably less than 0.5 wt.%, more preferably less than 0.25 wt.%, and even more preferably less than 0.05 wt.%, based on the total weight of the wick. The wick according to the invention preferably contains inorganic sulfate, inorganic hydrogen sulfate, and / or sulfuric acid. The wick preferably contains inorganic sulfate and inorganic hydrogen sulfate.

[0026] According to a further embodiment, the wick according to the invention comprises a second additive selected from the group consisting of ammonium nitrate, cerium nitrate, potassium nitrate, magnesium hydroxide, aluminum hydroxide, urea, paraffin, a polymer or combinations thereof, preferably selected from the group consisting of cerium nitrate, paraffin or combinations thereof, and more preferably cerium nitrate.

[0027] If the second additive is a polymer, the polymer is preferably an organic polymer. Preferably, the organic polymer is a polyethylene glycol, a polyacrylate, or a vinyl-based polymer. The polymers can be homopolymers or copolymers and can contain other monomers, such as mono- or diunsaturated monomers such as ethylene, propylene, and / or butadiene.

[0028] The polymer can also be multivalent, preferably the polymer is di-, tri- or tetravalent.

[0029] According to a further embodiment, the wick according to the invention comprises at least one boron-free flame retardant, wherein the at least one flame retardant is preferably a phosphorus-containing inorganic substance, more preferably polyphosphoric acid and / or polyphosphate, more preferably ammonium polyphosphate.

[0030] A flame retardant prevents the wick from decomposing. Decomposition in this context refers to the so-called glow-off, i.e., the wick's incandescence as the candle burns. According to the present invention, the flame retardant is therefore responsible, among other things, for the advantageous burning behavior, while at the same time, hazardous boron-containing substances can be dispensed with. Flame retardants according to the invention are all flame retardants known to those skilled in the art that are suitable for use in wicks and are boron-free.

[0031] Preferably, the at least one flame retardant is selected from the group consisting of inorganic phosphorus-containing substances, phosphates, organic phosphorus compounds, nitrogen compounds, silicic acid or combinations thereof.

[0032] The phosphates are preferably selected from inorganic and organic phosphates, more preferably from dihydrogen phosphates, hydrogen phosphates, polyphosphates, and / or combinations thereof, even more preferably from ammonium dihydrogen phosphate, ammonium polyphosphate, or combinations thereof. Particularly preferably, the at least one flame retardant is polyphosphoric acid and / or polyphosphate, and most preferably ammonium polyphosphate.

[0033] The organic phosphorus compounds are preferably ammonium salts of organic phosphorus compounds.

[0034] The nitrogen compounds are preferably selected from inorganic nitrogen compounds, organic nitrogen compounds or combinations thereof, preferably from inorganic nitrogen compounds.

[0035] According to a preferred embodiment, the wick comprises, preferably consists of, a wick material, wherein the wick material is selected from cotton, rayon rayon, cellulose fibers, paper yarn, linen yarn or combinations thereof; a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds and / or peroxides, and preferably from inorganic peroxo compounds; and an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, magnesium sulfate, aluminum sulfate, potassium sulfate and calcium sulfate.According to another preferred embodiment, the wick comprises, preferably consists of, a wick material, wherein the wick material is selected from cotton, rayon, cellulose fibers, paper yarn, linen yarn or combinations thereof; a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds and / or peroxides, and is preferably an inorganic peroxo compound, wherein the proportion of first additive is 0.00001 to 10 wt.%, preferably 0.0001 to 1.0 wt.% and more preferably 0.001 to 0.1 wt.% based on the total weight of the wick; and optionally an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, magnesium sulfate, aluminum sulfate, potassium sulfate and calcium sulfate, wherein preferably the proportion of inorganic sulfate is from 0.00001 to 1 wt.%, preferably 0.0001 to 0.5 wt.% and more preferably 0.001 to 0.25 wt.% based on the total weight of the wick.

[0036] According to a further embodiment, the wick comprises a second flame retardant, which can be selected from the aforementioned flame retardants. In this case, the at least one first and second flame retardant are different from one another.

[0037] In a further embodiment, the wick contains a third additive, wherein the third additive is selected from the group consisting of cerium nitrate, ammonium nitrate, magnesium hydroxide, ammonium hydroxide, aluminum hydroxide, urea, sulfur, organic sulfur compounds, inorganic sulfur compounds or combinations thereof, more preferably selected from the group consisting of sulfur, organic sulfur compounds and / or inorganic sulfur compounds.

[0038] The third additive is different from the second additive.

[0039] The wick according to the invention may contain further additives.

[0040] According to one embodiment, the wick is boron-free. The wick according to the invention can also comprise a wick wax. The wick wax is regularly applied to the outside of the wick after impregnation and drying.

[0041] A second aspect of the invention relates to a candle comprising a wick according to the invention.

[0042] The above statements regarding the wick according to the invention also apply, where applicable, to the candle according to the invention.

[0043] Candle in the sense of the invention is a candle material which comprises a wick.

[0044] Candle materials within the meaning of the invention are substances that are used as the main fuel in a candle.

[0045] According to one embodiment, the candle materials are selected from the group consisting of paraffin, stearin of animal and / or plant origin, beeswax, palm wax, soy wax, rapeseed wax, olive wax, coconut wax, fats of animal and / or plant origin, or combinations thereof. The candle according to the invention can thus also be made from various candle materials.

[0046] Furthermore, the candle according to the invention can contain additives such as fragrances, dyes or combinations thereof.

[0047] The candle can take any form known to the expert, in particular a tealight, pillar candle, glass candle, or tapered candle.

[0048] The wick according to the invention is selected depending on the candle material used. The burning characteristics and the angle of curvature of the wick are determined by the interaction of the candle material used.

[0049] In a third aspect, the present invention relates to a method for treating a wick with an impregnation solution, comprising the steps of a) passing the wick through the impregnation solution, wherein the impregnation solution comprises a solvent, preferably water, and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds, and / or peroxides; b) winding the impregnated wick onto a drying device.

[0050] According to one embodiment, the wick is passed through the impregnation solution in step a) at a speed of at least 100 m / min, preferably at least 140 m / min, and more preferably at least 180 m / min, with the residence time of the wick in the impregnation solution being at least 0.5 seconds or more, preferably 0.7 seconds or more, and more preferably 0.8 seconds or more. The residence time of the wick in the impregnation solution does not exceed 1 minute. The residence time is preferably less than 30 seconds, more preferably less than 20 seconds, and even more preferably less than 10 seconds.

[0051] The method according to the invention makes it possible to sufficiently soak a wide variety of wick materials with an impregnation solution.

[0052] The process according to the invention allows the wick to remain in the soaking solution for a longer time. This allows the soaking solution to penetrate the wick better, enabling improved combustion. The process according to the invention also prepares, i.e., soaks, the wick more gently.

[0053] Furthermore, the feed rate in step a) is preferably a maximum of 250 m / min, preferably a maximum of 225 m / min, and more preferably a maximum of 200 m / min. The feed rate is preferably 190 m / min.

[0054] Preferably, the tension of the wick in step a) is 0.1 kg to 3.0 kg, more preferably 0.5 kg to 2.5 kg and even more preferably 1.0 kg to 2.0 kg.

[0055] Preferably, in step b), the relative humidity is between 5 and 25%, preferably between 10 and 20% and more preferably between 10 and 15%.

[0056] The drying time in step b) is at least 1 h, preferably at least 1.5 h and more preferably at least 2 h.

[0057] Preferably, the wick is waxed after the drying step c). This ensures that the wick can be inserted into the candle material during candle production and is immediately supplied with wax upon lighting.

[0058] Furthermore, another step can be performed before step a). In this preliminary step, the wick is braided.

[0059] If the wick is not waxed directly after the drying step c), the prepared and dried wick is wound onto a device, preferably a paper tube, after the drying step c).

[0060] The statements made under the previous aspect apply to the wick which is treated in the process according to the invention.

[0061] Impregnation solutions are also called preparation solutions.

[0062] The soaking solution in step a) is environmentally friendly. Furthermore, the soaking solution is at least partially biodegradable. Furthermore, the soaking solution positively influences the burning behavior of wicks.

[0063] According to one embodiment, the first additive of the impregnation solution in step a) is selected from the group consisting of peroxo compounds and / or peroxy compounds, and preferably it is selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid, peroxybenzoic acid, peroxyacetic acid, performic acid or combinations thereof.

[0064] According to a further embodiment, the first additive of the impregnation solution in step a) is selected from the group consisting of inorganic or organic peroxo compounds, and preferably it is an inorganic peroxo compound.

[0065] In a further embodiment, the first additive of the impregnation solution in step a) is a peroxo compound selected from the group consisting of salts of organic and inorganic peroxo acids, preferably selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid, or combinations thereof, and more preferably disodium peroxodisulfate, dipotassium peroxodisulfate, sodium peroxomonosulfate, potassium peroxomonosulfate, ammonium peroxomonosulfate, or combinations thereof. Preferably, the first additive is pentapotassium bis(peroxomonosulfate) bis(sulfate).

[0066] Preferably, no hydrogen peroxide is added to the impregnation solution.

[0067] According to one embodiment, the proportion of first additive in the impregnation solution in step a) is 0.001 to 25 wt.%, preferably 0.01 to 20 wt.% and more preferably 0.1 to 16 wt.% based on the total weight of the impregnation solution.

[0068] According to a further embodiment, the proportion of first additive in the impregnation solution in step a) is less than 25 wt.%, preferably less than 20 wt.%, and more preferably less than 16 wt.%, based on the total weight of the impregnation solution.

[0069] The solvent for the impregnation solution is preferably water. If water is used as the solvent, it may contain traces of dissolved substances. Demineralized water is preferably used as the solvent.

[0070] In one embodiment, the impregnation solution in step a) comprises an inorganic sulfate, preferably an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate, and calcium sulfate, and more preferably potassium sulfate; and / or the impregnation solution in step a) comprises an inorganic hydrogen sulfate, preferably lithium hydrogen sulfate, beryllium hydrogen sulfate, sodium hydrogen sulfate, ammonium hydrogen sulfate, aluminum hydrogen sulfate, magnesium hydrogen sulfate, potassium hydrogen sulfate, and calcium hydrogen sulfate, and more preferably potassium hydrogen sulfate. According to one embodiment, the proportion of inorganic sulfate in the impregnation solution in step a) is from 0.0001 to 15 wt.%, preferably 0.001 to 10 wt.%, and more preferably 0.005 to 5 wt.%, based on the total weight of the impregnation solution.

[0071] According to a further embodiment, the proportion of inorganic hydrogen sulfate in the impregnation solution in step a) is from 0.0001 to 15 wt.%, preferably 0.001 to 10 wt.% and more preferably 0.005 to 5 wt.% based on the total weight of the impregnation solution.

[0072] In one embodiment, the proportion of inorganic sulfate in the impregnation solution in step a) is less than 15 wt.%, preferably less than 10 wt.%, more preferably less than 5 wt.% and even more preferably less than 2.5 wt.%, based on the total weight of the impregnation solution.

[0073] In a further embodiment, the proportion of inorganic hydrogen sulfate is less than 15 wt.%, preferably less than 10 wt.%, more preferably less than 5 wt.% and even more preferably less than 2.5 wt.% based on the total weight of the impregnation solution.

[0074] The impregnation solution in step a) preferably contains inorganic sulfate, inorganic hydrogen sulfate, and / or sulfuric acid. Preferably, the impregnation solution contains inorganic sulfate and inorganic hydrogen sulfate.

[0075] According to a further embodiment, the impregnation solution in step a) comprises a second additive selected from the group consisting of ammonium nitrate, cerium nitrate, potassium nitrate, magnesium hydroxide, aluminum hydroxide, urea, paraffin, a polymer or combinations thereof, preferably selected from the group consisting of cerium nitrate, paraffin or combinations thereof, and more preferably cerium nitrate.

[0076] If the second additive is a polymer, the polymer is preferably an organic polymer. Preferably, the organic polymer is a polyethylene glycol, a polyacrylate, or a vinyl-based polymer. The polymers can be homopolymers or copolymers and can contain other monomers, such as mono- or diunsaturated monomers such as ethylene, propylene, and / or butadiene.

[0077] The polymer can also be multivalent, preferably the polymer is di-, tri- or tetravalent.

[0078] According to a further embodiment, the impregnation solution in step a) comprises at least one boron-free flame retardant, wherein preferably the at least one flame retardant is a phosphorus-containing inorganic substance, more preferably polyphosphoric acid and / or polyphosphate, more preferably ammonium polyphosphate.

[0079] Flame retardants according to the invention are all flame retardants known to the person skilled in the art that are suitable for use in wicks and are boron-free.

[0080] Preferably, the at least one flame retardant is selected from the group consisting of inorganic phosphorus-containing substances, phosphates, organic phosphorus compounds, nitrogen compounds, silicic acid or combinations thereof.

[0081] The phosphates are preferably selected from inorganic and organic phosphates, more preferably from dihydrogen phosphates, hydrogen phosphates, polyphosphates, and / or combinations thereof, even more preferably from ammonium dihydrogen phosphate, ammonium polyphosphate, or combinations thereof. Particularly preferably, the at least one flame retardant is polyphosphoric acid and / or polyphosphate, and most preferably ammonium polyphosphate.

[0082] The organic phosphorus compounds are preferably ammonium salts of organic phosphorus compounds.

[0083] The nitrogen compounds are preferably selected from inorganic nitrogen compounds, organic nitrogen compounds or combinations thereof, preferably from inorganic nitrogen compounds.

[0084] According to a further embodiment, the impregnation solution in step a) comprises a second flame retardant, which can be selected from the aforementioned flame retardants. In this case, the at least one first and second flame retardant are different from one another.

[0085] According to a further embodiment, the impregnation solution in step a) contains a third additive, wherein the third additive is selected from the group consisting of cerium nitrate, ammonium nitrate, magnesium hydroxide, ammonium hydroxide, aluminum hydroxide, urea, sulfur, organic sulfur compounds, inorganic sulfur compounds or combinations thereof, more preferably selected from the group consisting of sulfur, organic sulfur compounds and / or inorganic sulfur compounds.

[0086] The third additive is different from the second additive.

[0087] The impregnation solution in step a) may contain further additives.

[0088] According to one embodiment, the impregnation solution is boron-free.

[0089] In a fourth aspect, the invention relates to a wick obtainable by means of the method according to the invention.

[0090] All the above statements regarding the wick also apply to this aspect of the invention.

[0091] In a fifth aspect, the invention relates to the use of an impregnation solution for treating a wick.

[0092] All the above statements regarding the impregnation solution also apply to this aspect of the invention.

[0093] According to one embodiment, the proportion of first additive in the impregnation solution is 0.01 to 25 wt.%, preferably 0.1 to 20 wt.%, and more preferably 0.2 to 16 wt.%, based on the total weight of the impregnation solution, and / or the impregnation solution comprises an inorganic sulfate, preferably an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate, and calcium sulfate, and more preferably potassium sulfate; and / or wherein no hydrogen peroxide is added to the impregnation solution. Further advantages of the invention emerge from the following description of preferred embodiments, which, however, are in no way to be understood as limiting. All embodiments of the invention can be combined with one another within the scope of the invention.

[0094] Examples of implementation

[0095] Materials

[0096] Sulfuric acid was purchased from VWR (Germany).

[0097] Pentapotassium bis(peroxymonosulfate) bis(sulfate) (CAS No. 70693-62-8) was purchased from OQEMA GmbH (Germany) (SAU in Table 1).

[0098] Paraffin was purchased from Rudolf GmbH (Germany) under the name PERRUSTOL CCF.

[0099] Cerium nitrate was purchased from Thermofisher (Belgium).

[0100] Paraffin was purchased from Rudolf GmbH (Germany) under the name.

[0101] EUCAM textile was purchased from Endotherm Brandschutz (Saarbrücken, Germany).

[0102] The wax blend used is a mixture of 50% rapeseed wax and 50% soy wax. The waxes were sourced from Th. Tromm, Cologne (Germany).

[0103] The wick material is cotton.

[0104] Experimental procedure

[0105] Four soaking solutions were prepared with the compositions shown in Table 1. All soaking solutions are aqueous solutions. Table 1: Soaking solutions for wicks

[0106] The wick material was immersed in the soaking solution (composition according to Table 1) for approximately 1 second and then manually removed. The wicks were then hung and dried overnight at room temperature.

[0107] Wick wax was heated to 90°C and, once completely melted, stirred. The wicks were inserted for approximately 2 seconds until no more air bubbles rose. Excess wax was manually removed.

[0108] The resulting wicks were then threaded into candle blanks and trimmed to a straight line, leaving any excess. The candle blanks are so-called glass candles with a diameter of 75 mm and a height of 90 mm.

[0109] Burning tests were carried out on all wicks that had been impregnated with impregnation solutions according to Examples 1 to 4.

[0110] For the fire tests, the ambient temperature was at least 15°C and there was no draft.

[0111] The burning behavior and curvature of the wick were checked 1 h after lighting.

[0112] The burning behavior of all wicks was good and met the RAL-GZ 041 requirements. The wicks protruded straight from the wax and had a curvature between 45° and 90°.

Claims

Patent claims 1 . A wick comprising a wick material, wherein the wick material is selected from cotton, rayon, cellulose fibers, paper yarn, linen yarn, or combinations thereof; and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds, and / or peroxides.

2. Wick according to claim 1, wherein the first additive is selected from the group consisting of peroxo compounds and / or peroxy compounds, and is preferably selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid, peroxybenzoic acid, peroxyacetic acid, performic acid or combinations thereof.

3. Wick according to one of the preceding claims, wherein the first additive is selected from the group consisting of inorganic or organic peroxo compounds, and is preferably an inorganic peroxo compound.

4. Wick according to one of the preceding claims, wherein the first additive is a peroxo compound selected from the group consisting of salts of organic and inorganic peroxo acids, preferably selected from the group consisting of the salts of peroxomonosulfuric acid, peroxodisulfuric acid or combinations thereof and more preferably disodium peroxodisulfate, dipotassium peroxodisulfate, sodium peroxomonosulfate, potassium peroxomonosulfate, Ammonium peroxomonosulfate or combinations thereof, and more preferably it is pentapotassium bis(peroxomonosulfate) bis(sulfate).

5. Wick according to one of the preceding claims, wherein the proportion of first additive is 0.00001 to 10 wt.%, preferably 0.0001 to 1.0 wt.% and more preferably 0.001 to 0.1 wt.% based on the total weight of the wick.

6. Wick according to one of the preceding claims, wherein the wick comprises an inorganic sulfate, preferably an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate and calcium sulfate, and more preferably potassium sulfate; and / or wherein the wick comprises an inorganic hydrogen sulfate, preferably lithium hydrogen sulfate, beryllium hydrogen sulfate, sodium hydrogen sulfate, ammonium hydrogen sulfate, aluminum hydrogen sulfate, Magnesium hydrogen sulfate, potassium hydrogen sulfate, and calcium hydrogen sulfate, and more preferably potassium hydrogen sulfate; and / or wherein the proportion of inorganic sulfate is from 0.00001 to 1 wt.%, preferably 0.0001 to 0.5 wt.%, and more preferably 0.001 to 0.25 wt.%, based on the total weight of the wick; and / or wherein the proportion of inorganic hydrogen sulfate is from 0.00001 to 1 wt.%, preferably 0.0001 to 0.5 wt.%, and more preferably 0.001 to 0.25 wt.%, based on the total weight of the wick.

7. Wick according to one of the preceding claims, wherein the wick comprises a second additive selected from the group consisting of ammonium nitrate, cerium nitrate, paraffin, a polymer or combinations thereof, preferably selected from the group consisting of cerium nitrate, paraffin or combinations thereof, and more preferably cerium nitrate.

8. Wick according to one of the preceding claims, wherein the wick comprises at least one boron-free flame retardant, wherein the at least one flame retardant is preferably a phosphorus-containing inorganic substance, more preferably polyphosphoric acid and / or polyphosphate, more preferably ammonium polyphosphate; and / or wherein the wick is boron-free.

9. A candle comprising a wick according to claims 1 to 8.

10. Candle according to claim 9, wherein the candle is made from paraffin, stearin of animal and / or vegetable origin, beeswax, palm wax, soy wax, rapeseed wax, olive wax, coconut wax, fats of animal or vegetable origin or combinations thereof. 1 1. A method for treating a wick with an impregnation solution, comprising the steps of a) passing the wick through the impregnation solution, wherein the impregnation solution comprises a solvent, preferably water, and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds, and / or peroxides; and b) winding the impregnated wick onto a drying device.

12. Use of an impregnation solution for treating a wick, wherein the impregnation solution comprises a solvent, preferably water, and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxo compounds, and / or peroxides; and / or wherein the impregnation solution is boron-free.

3. Use of an impregnation solution according to claim 12, wherein the proportion of first additive is 0.01 to 25 wt.%, preferably 0.1 to 20 wt.%, and more preferably 0.2 to 16 wt.%, based on the total weight of the impregnation solution, and / or wherein the impregnation solution comprises an inorganic sulfate, preferably an inorganic sulfate selected from the group consisting of lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate, and calcium sulfate, and more preferably potassium sulfate; and / or wherein no hydrogen peroxide is added to the impregnation solution.

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