Candle wick and method for treating candlewick

Abstract

The present invention relates to a candlewick comprising a candlewick material wherein the candlewick material is selected from cotton, rayon, cellulosic fibres, paper yarns, linen yarns or a combination thereof; and a first additive, wherein the first additive is selected from the group consisting of peroxy compounds, peroxy compounds and / or peroxides.

Description

TECHNICAL FIELD

[0001] The present invention relates to a wick and to a candle comprising a wick according to the invention. Furthermore, the present invention relates to a method of treating a wick with an impregnation solution and to the use of an impregnation solution for impregnating a wick. BACKGROUND

[0002] Wicks of candles have to combine a number of properties. On the one hand, they have to exhibit good burning properties, but must not burn out too quickly. On the other hand, the bending angle of the wick has to be within a predetermined range in order to produce a corresponding flame size and shape.

[0003] In order to achieve these properties, various substances influencing the burning properties are added to the wick. In this case, in order to obtain a wick having a corresponding curvature and advantageous burning properties, the interaction of all components is very important.

[0004] From the prior art, boron-containing substances such as boric acid, borate salts or also borax are known, which are used as flame retardants. These substances cause the wick to exhibit advantageous burning properties. Such a wick also has advantageous curvature.

[0005] However, borate salts, in particular borax, can have a negative effect on health and are classified as reproductive toxic substances. This means that wicks impregnated, i.e. soaked, with such substances are now no longer popular. SUMMARY

[0006] It is therefore advantageous to provide a wick which is harmless to health and still has the advantageous burning and bending properties of conventional wicks containing boron and in particular borate salts, and a method of treating a wick.

[0007] It is therefore an object of the present invention to provide a wick which has good burning properties and good bending properties. Furthermore, it is desirable that the wick does not contain boron-containing substances.

[0008] This object is achieved by the wick according to the invention according to claim 1. Furthermore, the present invention relates to a candle according to claim 9, which comprises a wick according to the invention. Furthermore, the present invention relates to a method of treating a wick according to claim 11 and to the use of an impregnation solution for treating a wick according to claim 12.

[0009] In a first aspect, the present invention relates to a wick, comprising: a wick material, wherein the wick material is selected from the group consisting of cotton, rayon, cellulose fibers, paper yarn, flax 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 in the sense of the present application are carboxylic acid derivatives of the general formula R-CO-OOH and their salts, such as e.g. peroxyacetic acid or peroxobenzoic acid; the corresponding salts are also included.

[0011] Peroxo compounds in the sense of the present application are compounds, in particular acids and their salts, in which O2 2- appears as a ligand, or those compounds in which the -O group is replaced by an -O-O group. Peroxy acids are derived from the corresponding oxo acids by partial or complete replacement of the oxygen atoms by peroxy groups; these include, for example, peroxymonosulfuric acid HO3S-OOH, peroxymonopersulfuric acid HO3S-O-O-SO3H and their salts, and also peroxochromic acid salts.

[0012] Peroxides are compounds which contain the peroxide anion O2 2- or the divalent -O-O- group (peroxy group); the oxygen atoms have an oxidation state of -1 in the peroxide anion. The wick is made of a wick material. This wick material forms the base material and is impregnated with an impregnation solution. Preferably, the wick is obtained by treating the wick material with the impregnation solution. The wick according to the application is characterized by the balance of its burning properties. On the one hand, the wick forms a good curvature, on the other hand, it does not warp, and thus can be relit several times.

[0013] According to one embodiment, the first additive is selected from the group consisting of peroxo compounds and / or peroxy compounds, and preferably from the group consisting of salts of peroxymonosulfuric acid, peroxymonopersulfuric acid, peroxybenzoic acid, peroxyacetic acid, peroxyformic acid or combinations thereof.

[0014] According to another embodiment, the first additive is selected from the group consisting of inorganic or organic peroxo compounds, and preferably is an inorganic peroxo compound.

[0015] In another embodiment, the first additive is a peroxo compound selected from the group consisting of organic and inorganic peroxo acid salts, preferably selected from the group consisting of peroxymonosulfate, peroxymonopersulfate or combinations thereof, and more preferably is sodium peroxymonosulfate, potassium peroxymonopersulfate, sodium peroxymonosulfate, potassium peroxymonosulfate, ammonium peroxymonosulfate or combinations thereof. Preferably, the first additive is dipotassium bis(peroxymonosulfate) bis(sulfate).

[0016] According to one embodiment, the proportion of the first additive is less than 10 wt% based on the total weight of the candle wick, preferably less than 1.0 wt%, and more preferably less than 0.1 wt%.

[0017] According to another embodiment, the proportion of the first additive is from 0.00001wt% to 10wt% based on the total weight of the candle wick, preferably from 0.0001wt% to 1.0wt%, and more preferably from 0.001wt% to 0.1wt%.

[0018] In one embodiment, the wick comprises an inorganic sulfate, preferably an inorganic sulfate selected from 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 bisulfate, preferably lithium bisulfate, beryllium bisulfate, sodium bisulfate, ammonium bisulfate, aluminum bisulfate, magnesium bisulfate, potassium bisulfate, calcium bisulfate, and more preferably potassium bisulfate.

[0019] According to one embodiment, the proportion of inorganic sulfate is 0.00001 wt% to 1 wt% based on the total weight of the candle wick, preferably 0.0001 wt% to 0.5 wt%, and more preferably 0.001 wt% to 0.25 wt%.

[0020] According to another embodiment, the proportion of inorganic bisulfate is 0.00001 wt% to 1 wt% based on the total weight of the candle wick, preferably 0.0001 wt% to 0.5 wt%, and more preferably 0.001 wt% to 0.25 wt%.

[0021] In one embodiment, the proportion of inorganic sulfate is less than 1 wt% based on the total weight of the candle wick, preferably less than 0.5 wt%, more preferably less than 0.25 wt%, and even more preferably less than 0.05 wt%.

[0022] In another embodiment, the proportion of inorganic bisulfate is less than 1 wt% based on the total weight of the candle wick, preferably less than 0.5 wt%, more preferably less than 0.25 wt%, and even more preferably less than 0.05 wt%.

[0023] Preferably, the wick according to the invention comprises inorganic sulfate, inorganic bisulfate and / or sulfuric acid. Preferably, the wick comprises inorganic sulfate and inorganic bisulfate.

[0024] According to another embodiment, the wick according to the invention includes a second additive selected from ammonium nitrate, cerium nitrate, potassium nitrate, magnesium hydroxide, aluminum hydroxide, urea, paraffin, polymers, or combinations thereof, preferably selected from cerium nitrate, paraffin, or combinations thereof, and more preferably cerium nitrate.

[0025] If the second additive is a polymer, the polymer is preferably an organic polymer. Preferably, the organic polymer is polyethylene glycol, polyacrylate, or a vinyl polymer. These polymers may be homopolymers or copolymers and may contain other monomers, such as monounsaturated or diunsaturated monomers, such as ethylene, propylene, and / or butadiene.

[0026] The polymer can also be a multivalent polymer, preferably a divalent, trivalent, or tetravalent polymer.

[0027] According to another embodiment, the candle wick according to the invention 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, and even more preferably ammonium polyphosphate.

[0028] Flame retardants prevent the wick from burning out. Here, "burning out" refers to the so-called complete burning, i.e., the wick burning out completely when the candle is finished. Therefore, according to the present invention, the flame retardant is particularly responsible for achieving favorable combustion performance, while simultaneously eliminating harmful boron-containing substances. The flame retardant according to the present invention is any boron-free flame retardant known to those skilled in the art suitable for candle wicks. Preferably, the at least one flame retardant is selected from inorganic phosphorus-containing substances, phosphates, organophosphorus compounds, nitrogen compounds, silicic acid, or combinations thereof. The phosphate is preferably selected from inorganic phosphates and organic phosphates, more preferably from dihydrogen phosphate, hydrogen phosphate, polyphosphate and / or combinations thereof, and 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 a polyphosphate, and most preferably ammonium polyphosphate.

[0029] The organophosphorus compound is preferably an ammonium salt of an organophosphorus compound.

[0030] The nitrogen compound is preferably selected from inorganic nitrogen compounds, organic nitrogen compounds, or combinations thereof, with inorganic nitrogen compounds being the most preferred.

[0031] According to a preferred embodiment, the wick comprises, preferably, the following components: The wick material is selected from cotton, rayon, cellulose fiber, paper yarn, linen yarn, or a combination thereof; A first additive, wherein the first additive is selected from peroxy compounds, peroxides and / or peroxides, and preferably from inorganic peroxides; and Inorganic sulfates are selected from lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, magnesium sulfate, aluminum sulfate, potassium sulfate, and calcium sulfate.

[0032] According to another preferred embodiment, the wick comprises, preferably, the following components: The wick material is selected from cotton, rayon, cellulose fiber, paper yarn, linen yarn, or a combination thereof; A first additive, wherein the first additive is selected from peroxy compounds, peroxides and / or peroxides, and preferably inorganic peroxides, wherein the proportion of the first additive is from 0.00001 wt% to 10 wt% based on the total weight of the candle wick, preferably from 0.0001 wt% to 1.0 wt%, and more preferably from 0.001 wt% to 0.1 wt%; and The optional inorganic sulfate is selected from lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, magnesium sulfate, aluminum sulfate, potassium sulfate and calcium sulfate, wherein the proportion of the inorganic sulfate is preferably 0.00001 wt% to 1 wt% based on the total weight of the candle wick, more preferably 0.0001 wt% to 0.5 wt%, and even more preferably 0.001 wt% to 0.25 wt%.

[0033] According to another embodiment, the candle wick includes a second flame retardant, which may be selected from the aforementioned flame retardants. In this case, the at least one first flame retardant and the second flame retardant are different from each other.

[0034] In another embodiment, the wick contains a third additive, wherein the third additive is selected from 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 sulfur, organic sulfur compounds and / or inorganic sulfur compounds.

[0035] The third additive is different from the second additive.

[0036] The wick according to the invention may also contain additional additives.

[0037] According to one embodiment, the candle wick does not contain boron. The wick according to the invention may also include wick wax. Wick wax is typically applied to the outer layer of the wick after impregnation and drying.

[0038] A second aspect of the invention relates to a candle comprising a wick according to the invention.

[0039] The above statements regarding the wick according to the invention also apply, where applicable, to the candle according to the invention.

[0040] The candle in this invention refers to a candle material including a wick.

[0041] In this invention, candle material refers to the substance used as the main fuel in a candle. According to one embodiment, the candle material is selected from paraffin wax, stearic acid from animal and / or plant sources, beeswax, palm wax, soybean wax, rapeseed wax, olive wax, coconut wax, fats from animal and / or plant sources, or combinations thereof. Therefore, the candle according to the invention can also be made from different candle materials.

[0042] Furthermore, the candles according to the invention may also contain additives, such as fragrances, dyes, or combinations thereof.

[0043] Candles may have any shape known to those skilled in the art, particularly tea candles, column candles, glass-covered candles, or stick candles.

[0044] The wick according to the invention is selected based on the candle material used. The burning characteristics and bending angle of the wick depend on the respective candle material used.

[0045] In a third aspect, the present invention relates to a method for treating a candle wick with an impregnation solution, the method comprising the following steps: a) Passing the wick through an impregnation solution, wherein the impregnation solution comprises a solvent, preferably water, and a first additive, wherein the first additive is selected from peroxy compounds, peroxides, and / or peroxides; b) Wrap the soaked candle wick around the drying device.

[0046] According to one embodiment, in step a), the wick is passed through the impregnation solution at a speed of at least 100 m / min, preferably at least 140 m / min, and more preferably at least 180 m / min, wherein the residence time of the wick in the impregnation solution is at least 0.5 seconds or longer, preferably 0.7 seconds or longer, and more preferably 0.8 seconds or longer. 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.

[0047] It is feasible, according to the method of the present invention, to thoroughly soak a wide variety of candle wick materials with an impregnation solution. The method according to the invention allows for an extended residence time of the wick in the impregnation solution. This enables the impregnation solution to penetrate the wick more effectively, resulting in better combustion performance. The wick pretreatment, i.e., impregnation, is also gentler using the method according to the invention. More preferably, the maximum passing speed in step a) is 250 m / min, more preferably 225 m / min, and even more preferably 200 m / min. Preferably, the passing speed is 190 m / min.

[0048] 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.

[0049] Preferably, in step b), the relative humidity is between 5% and 25%, more preferably between 10% and 20%, and even more preferably between 10% and 15%.

[0050] The drying time in step b) is at least 1 hour, preferably at least 1.5 hours, and more preferably at least 2 hours.

[0051] Preferably, the wick is waxed after drying step c). This ensures that the wick can be inserted into the candle material during candle production and that the wick is immediately supplied with wax when lit.

[0052] In addition, another step can be performed before step a). In this upstream step, the wick is twisted into a strand.

[0053] If the wick is not waxed directly after drying step c), the pre-treated and dried wick is wound onto the device, preferably a paper tube, after drying step c).

[0054] The candle wicks processed according to the method of the present invention are applicable to the embodiments described above.

[0055] The impregnation solution is also known as the pretreatment solution.

[0056] The impregnation solution in step a) is environmentally friendly. Furthermore, the impregnation solution is at least partially biodegradable. In addition, the impregnation solution has a positive impact on the burning performance of the candle wick.

[0057] According to one embodiment, the first additive in the impregnation solution in step a) is selected from peroxide compounds and / or peroxy compounds, and is preferably selected from salts of persulfate, persulfate, peroxybenzoic acid, peracetic acid, peroxyformic acid, or combinations thereof.

[0058] According to another embodiment, the first additive in the impregnation solution in step a) is selected from inorganic or organic peroxide compounds, and preferably inorganic peroxide compounds.

[0059] In another embodiment, the first additive in the impregnation solution in step a) is a peroxide compound selected from organic and inorganic peroxide salts, preferably selected from persulfate, perdisulfate, or combinations thereof, and more preferably sodium perdisulfate, potassium perdisulfate, sodium persulfate, potassium persulfate, ammonium persulfate, or combinations thereof. Preferably, the first additive is pentapotassium bis(persulfate)bis(sulfate).

[0060] Preferably, hydrogen peroxide is not added to the impregnation solution.

[0061] According to one embodiment, the proportion of the first additive in the impregnation solution in step a) is from 0.001 wt% to 25 wt% based on the total weight of the impregnation solution, preferably from 0.01 wt% to 20 wt%, and more preferably from 0.1 wt% to 16 wt%.

[0062] According to another embodiment, the proportion of the 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.

[0063] Preferably, the solvent for the impregnation solution is water. If water is used as the solvent, the solvent may contain trace amounts of substances dissolved therein. Preferably, deionized water is used as the solvent.

[0064] In one embodiment, the impregnation solution in step a) comprises an inorganic sulfate, preferably an inorganic sulfate selected from 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) includes inorganic bisulfate, preferably lithium bisulfate, beryllium bisulfate, sodium bisulfate, ammonium bisulfate, aluminum bisulfate, magnesium bisulfate, potassium bisulfate, calcium bisulfate, and more preferably potassium bisulfate.

[0065] According to one embodiment, the proportion of inorganic sulfate in the impregnation solution in step a) is from 0.0001 wt% to 15 wt% based on the total weight of the impregnation solution, preferably from 0.001 wt% to 10 wt%, and more preferably from 0.005 wt% to 5 wt%.

[0066] According to another embodiment, the proportion of inorganic bisulfate in the impregnation solution in step a) is from 0.0001 wt% to 15 wt% based on the total weight of the impregnation solution, preferably from 0.001 wt% to 10 wt%, and more preferably from 0.005 wt% to 5 wt%.

[0067] 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.

[0068] In another embodiment, the proportion of inorganic hydrogen sulfate is less than 15 wt% based on the total weight of the impregnation solution, preferably less than 10 wt%, more preferably less than 5 wt%, and even more preferably less than 2.5 wt%.

[0069] Preferably, the impregnation solution in step a) comprises inorganic sulfate, inorganic bisulfate, and / or sulfuric acid. Preferably, the impregnation solution comprises inorganic sulfate and inorganic bisulfate.

[0070] According to another embodiment, the impregnation solution in step a) includes a second additive selected from ammonium nitrate, cerium nitrate, potassium nitrate, magnesium hydroxide, aluminum hydroxide, urea, paraffin, polymers, or combinations thereof, preferably selected from cerium nitrate, paraffin, or combinations thereof, and more preferably cerium nitrate.

[0071] If the second additive is a polymer, the polymer is preferably an organic polymer. Preferably, the organic polymer is polyethylene glycol, polyacrylate, or a vinyl polymer. These polymers may be homopolymers or copolymers and may contain other monomers, such as monounsaturated or diunsaturated monomers, such as ethylene, propylene, and / or butadiene.

[0072] The polymer can also be a multivalent polymer, preferably a divalent, trivalent, or tetravalent polymer.

[0073] According to another embodiment, the impregnation solution in step a) includes 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, and even more preferably ammonium polyphosphate.

[0074] The flame retardant according to the present invention is any boron-free flame retardant known to those skilled in the art suitable for candle wicks. Preferably, the at least one flame retardant is selected from inorganic phosphorus-containing substances, phosphates, organophosphorus compounds, nitrogen compounds, silicic acid, or combinations thereof. The phosphate is preferably selected from inorganic phosphates and organic phosphates, more preferably from dihydrogen phosphate, hydrogen phosphate, polyphosphate and / or combinations thereof, and 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 a polyphosphate, and most preferably ammonium polyphosphate.

[0075] The organophosphorus compound is preferably an ammonium salt of an organophosphorus compound.

[0076] The nitrogen compound is preferably selected from inorganic nitrogen compounds, organic nitrogen compounds, or combinations thereof, with inorganic nitrogen compounds being the most preferred.

[0077] According to another embodiment, the impregnation solution in step a) includes a second flame retardant, which may be selected from the flame retardants described above. In this case, the at least one first flame retardant and the second flame retardant are different from each other.

[0078] According to another embodiment, the impregnation solution in step a) contains a third additive, wherein the third additive is selected from 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 sulfur, organic sulfur compounds and / or inorganic sulfur compounds.

[0079] The third additive is different from the second additive.

[0080] The impregnation solution in step a) may also contain other additives. According to one embodiment, the impregnation solution does not contain boron. In a fourth aspect, the present invention relates to a candle wick that can be obtained by means of the method according to the invention.

[0081] All the above-described embodiments concerning the candle wick are also applicable to this aspect of the present invention.

[0082] In a fifth aspect, the present invention relates to the use of an impregnation solution for treating candle wicks.

[0083] All the above-described embodiments of the impregnation solution are also applicable to this aspect of the present invention.

[0084] According to one embodiment, the proportion of the first additive in the impregnation solution is from 0.01 wt% to 25 wt% based on the total weight of the impregnation solution, preferably from 0.1 wt% to 20 wt%, and more preferably from 0.2 wt% to 16 wt%, and / or The impregnation solution comprises an inorganic sulfate, preferably an inorganic sulfate selected from lithium sulfate, beryllium sulfate, sodium sulfate, ammonium sulfate, aluminum sulfate, magnesium sulfate, potassium sulfate, and calcium sulfate, and more preferably potassium sulfate; and / or No hydrogen peroxide is added to the impregnation solution.

[0085] Other advantages of the invention will become apparent from the following description of preferred embodiments, but these embodiments should not be construed as limiting in any way. All embodiments of the invention can be combined with each other within the scope of the invention.

[0086] Example Material Sulfuric acid was purchased from VWR (Germany).

[0087] Pentapotassium di(persulfate) di(sulfate) (CAS No. 70693-62-8) was purchased from OQEMA GmbH (Germany) (SAU in Table 1).

[0088] The paraffin was purchased from Rudolf GmbH (Germany) under the trade name PERRUSTOL CCF.

[0089] Cerium nitrate was purchased from Thermofisher (Belgium).

[0090] The paraffin wax was purchased from Rudolf GmbH (Germany) and is a product of the same name.

[0091] EUCAM textiles were purchased from Endotherm Brandschutz (Saarbrücken, Germany).

[0092] The wax mixture used was a blend of 50% rapeseed wax and 50% soybean wax. The wax was purchased from Th. Tromm Köln (Germany).

[0093] The candle wick is made of cotton.

[0094] Experiment Implementation Four impregnation solutions were prepared, and their specific components are shown in Table 1. All impregnation solutions were aqueous solutions.

[0095] Table 1: Candle Wrench Impregnation Solution

[0096] Immerse the wick material in the impregnation solution (components shown in Table 1) for approximately 1 second, then peel it off manually. The wick is then hung up and allowed to dry overnight at room temperature.

[0097] Heat the wick wax to 90°C and stir until completely melted. Insert the wick into the wax for about 2 seconds, until no more air bubbles are produced. Manually remove any excess wax. The obtained wick is then inserted into the candle blank and the excess is trimmed off. The candle blank is a so-called glass dome candle, with a diameter of 75mm and a height of 90mm.

[0098] Burning tests were performed on all candle wicks that had been soaked in the impregnation solutions according to Examples 1 to 4. During the combustion test, the ambient temperature must be at least 15°C and there must be no draft. Check the burning performance and wick curvature 1 hour after lighting. All candle wicks exhibited good burning performance, meeting RAL-GZ 041 requirements. The wicks extended straight out of the wax, with a curvature between 45° and 90°.

Claims

1. A candle wick, the candle wick comprising: The wick material is selected from cotton, rayon, cellulose fiber, paper yarn, linen yarn, or a combination thereof; and The first additive is selected from peroxy compounds, peroxides, and / or peroxides.

2. The candle wick according to claim 1, The first additive is selected from peroxide compounds and / or peroxy compounds, and is preferably selected from salts of persulfate, persulfate, peroxybenzoic acid, peracetic acid, peroxyformic acid, or combinations thereof.

3. The candle wick according to any one of the preceding claims, The first additive is selected from inorganic or organic peroxide compounds, and is preferably an inorganic peroxide compound.

4. The candle wick according to any one of the preceding claims, The first additive is a peroxide compound selected from organic and inorganic peroxide salts, preferably selected from persulfate, perdisulfate or a combination thereof, and more preferably from sodium perdisulfate, potassium perdisulfate, sodium persulfate, potassium persulfate, ammonium persulfate or a combination thereof, and even more preferably from pentapotassium bis(persulfate) bis(sulfate).

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

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

7. The candle wick according to any one of the preceding claims, The candle wick includes a second additive selected from ammonium nitrate, cerium nitrate, paraffin, polymers, or combinations thereof, preferably selected from cerium nitrate, paraffin, or combinations thereof, and more preferably cerium nitrate.

8. The candle wick according to any one of the preceding claims, The wick comprises at least one boron-free flame retardant, preferably a phosphorus-containing inorganic substance, more preferably polyphosphoric acid and / or polyphosphates, and even more preferably ammonium polyphosphate; and / or The candle wick therein does not contain boron.

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

10. The candle according to claim 9, The candles described herein are made of paraffin, stearin of animal and / or plant origin, beeswax, palm wax, soybean wax, rapeseed wax, olive wax, coconut wax, fats of animal or plant origin, or combinations thereof.

11. A method for treating a candle wick with an impregnation solution, the method comprising the following steps: 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 peroxy compounds, peroxides, and / or peroxides; and b) Wrap the soaked candle wick around the drying device.

12. A use of an impregnation solution for treating a candle wick, wherein the impregnation solution comprises a solvent, preferably water, and a first additive, wherein the first additive is selected from peroxy compounds, peroxides, and / or peroxides; and / or wherein the impregnation solution is free of boron.

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

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