Substrate – coated novel combustible composition

Abstract

Described herein is a novel substrate coated vapour emitting composition for delivery of combustible substance, which integrates active ingredient emanation with burning-aided materials coated on to the surface of a paper in which the coated portion will undergo smouldering to release active ingredient.

Description

[0001] SUBSTRATE - COATED NOVEL COMBUSTIBLE COMPOSITION

[0002] Field of Invention:

[0003] The invention relates to a substrate coated combustible composition for volatile substance. More particularly, the current invention relates to a composition for combustible substance which is coated on paper and process thereof.

[0004] Background of the Invention:

[0005] Mosquitoes are vectors for numerous infectious diseases, including malaria, dengue fever, chikungunya, typhoid, Zika fever, and West Nile fever. Preventing mosquito bites is essential in reducing the transmission of these diseases. Various methods have been developed to repel mosquitoes, including sprays, creams, and electric vaporizers. Among these, mosquito repellent coils are widely used, especially in developing countries, due to their cost-effectiveness and ease of use.

[0006] Traditional mosquito coils are typically composed of pyrethroid insecticides mixed with a combustible material. The burning format for mosquito repellence is an age- old format which started from the coils by using the flower heads from Aster plants (Tanacetum cinerariifolium). The flower powder was mixed with a starch base to create sticks that would repel mosquitoes and other insects when burnt. As the sticks burned too quickly, they made longer sticks and coiled them into spirals. The natural insecticide in some members of the Aster family of plants is pyrethrum. Its active ingredient is pyrethrin, which attack the nervous systems of mosquitoes. When burned, the coil slowly releases the insecticide into the air, providing protection over several hours.

[0007] Recent advancements have focused on improving the bum consistency, enhancing the release profile of the active ingredients, and extending the duration of effectiveness. For example, US Patent No. 4,439,415 discloses a mosquito coil formulation that includes a combustible base material and an insecticide, with the goal of improving burn characteristics and efficacy. Further W02020 / 012492, describes a multilayer paper used for mosquito repellent. Similarly, US Patent No. 5,230,898 describes a mosquito repellent coil that incorporates a microencapsulated active ingredient to achieve controlled release.

[0008] Conventional mosquito repellent coils are typically composed of toxic fumes emitting components whereby the toxic fumes include carbon monoxide and carbon dioxide gases. Furthermore, the combustion of carbon powder is particularly harmful. These coils emit an unpleasant, acrid odour, low burning time and produce thick smoke. Typically, these double coils are 2-6 mm thick and width of 3-9 mm, weighs around 24-52 grams, indicating a high material and energy usage in their manufacture. The manufacturing process is labour-intensive, consuming significant amounts of water, electricity, and heat, and generating considerable waste. The punched materials from this process cannot be recycled, posing an ecological problem. The finished product often lacks visual appeal with a rough texture, brittle and not user friendly. The separation of coils is a cumbersome process which causes the breakage of the coil. The damage of the coils during transit, storage is quite common.

[0009] Paper based repellent, another mosquito repellent product, is crafted from saturating base paper with a GSM of 80-1000. It offers brief protection of 2-3 hours, There are many commercially available mosquito coils that use paper fibre. Plant fibrebased coils often lack structural integrity to place on a stand. Their weak structure is wobbly which may result in easy breakage and less burning time.

[0010] Overall, conventional mosquito coils and their manufacturing processes are not environmentally friendly and sustainable. Despite these advancements, there remains a need for a mosquito repellent delivery format which is environmentally friendly and sustainable in terms of the material usage, manufacturing process, energy consumption that provides a more controlled and extended release of active ingredients while minimizing the smoke and ash. Therefore, the current inventor proposes a substrate-coated formulation for an active ingredient emanating substance that can be used as a mosquito repellent / air freshener / disinfectant.

[0011] Object of the Invention:

[0012] The primary object of the present invention is to provide a sustainable, low carbon foot - printed product for release of active.

[0013] Another object of the present invention is to provide a manufacturing process which has reduced energy consumption, material usage and generating less to no waste.

[0014] Another object of the present invention is to design a retarded burning formulation that extends the burning time up to 12 hours, ensuring prolonged release of actives.

[0015] The yet another objective of the present invention is to leverage cutting-edge technologies for the precise deposition of materials, ensuring uniformity and functionality in the delivery system.

[0016] Summary of Invention:

[0017] With a view of overcoming the above problems current inventors have develop a novel substrate coated vapour emitting composition for delivery of combustible substance that integrates active ingredient emanation with burning-aided materials coated on to the surface of a paper in which the coated portion will undergo smouldering to release active ingredient and leaving the uncoated paper unbumed. Accordingly, the invention relates to a surface coated slow burning solid material on a substrate incorporating as combustible substance.

[0018] This invention aims to address these needs by utilizing a unique guided burning pathway design and advanced deposition techniques to coat the active ingredient onto a substrate. In an aspect, the invention is which a unique formulation of materials aiding heat generation coated with a guided pathway to ensure a controlled and consistent release of the active ingredient, through smouldering which can effectively repel and kill mosquitoes over an extended period.

[0019] In an aspect the present invention provides a retarded burning formulation that extends the burning time up to 12 hours, ensuring prolonged release of active.

[0020] In an aspect the present invention provides a low smoke, conveniently guided pathway with steady active release.

[0021] In an aspect the present invention provides a low smoke, conveniently guided pathway with differential active release.

[0022] The invention also describes a simple, economical, and industrially viable process for preparing the substrate for combustible substance.

[0023] Brief description of drawings

[0024] Fig 1 illustrates a combustible substance printed as a hexagonal design.

[0025] Fig 2 illustrates a combustible substance printed as a square configuration.

[0026] Fig 3 illustrates a traditional circular combustible substance composition.

[0027] Fig 4 illustrates zigzag-patterned combustible substance composition.

[0028] Fig 5 illustrates a combustible substance designed in the shape of a mosquito.

[0029] Fig 6 illustrates the process flow chart for the manufacturing of substrate coated combustible substance of the invention.

[0030] Detailed Description of Drawings:

[0031] Fig 1 describes a combustible substance composition with a hexagonal design. The combustible substance composition starts from the outer edge and spirals inward, forming a series of interconnected hexagonal shapes. Each segment of the hexagon is coated with the mosquito repellent formulation, ensuring an even burn and consistent release of active ingredients.

[0032] The hexagonal shape provides a unique aesthetic and efficient burning pathway, maximizing surface area for repellent release.

[0033] Fig 2 describes a combustible substance composition can be printed in a square configuration. The combustible substance composition begins at the perimeter and spirals inward in a square pattern. Each side of the square is uniformly coated with the active repellent formulation.

[0034] The square coil design facilitates controlled burning and consistent active ingredient release, with a geometric shape that can be easily packaged and stored.

[0035] Fig 3 describes a traditional circular combustible substance. The combustible substance starts at the outermost circle and spirals inward to the centre. The entire surface is coated with the mosquito repellent formulation.

[0036] The circular design is a classic and widely recognized shape for combustible substance, ensuring even burning and steady release of actives.

[0037] Fig 4 describes a zigzag-patterned combustible substance. The combustible substance features a continuous zigzag pathway from the outer edge to the centre, with each zigzag segment coated with the repellent formulation.

[0038] The zigzag design offers a distinctive burning pattern that can enhance the visual appeal while maintaining efficient release of the actives.

[0039] Fig 5 describes a combustible substance designed in the shape of a mosquito. The pathway follows the outline of a mosquito's body, starting from the outermost part of the wings and spiralling inward towards the head. The mosquito-shaped coat provides a thematic design that can attract consumer interest, while still delivering effective repellent action through its detailed and aesthetic form.

[0040] Fig 6 describes the process flow chart for the manufacturing of substrate coated combustible substance of the invention. The process begins with mixing of all the ingredients followed by preparation of slurry. Said slurry is then surface coated on a substrate followed by drying of the said coat. Finally, cutting surface coated substrate in a desired shape.

[0041] Detailed Description of the Invention:

[0042] The invention will now be described in detail in connection with certain preferred and optional embodiments, so that various aspects thereof may be more fully understood and appreciated. As used herein, the following terms and phrases shall have the meaning set forth below.

[0043] Unless specified otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art, to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, the preferred methods and materials are described. To describe the invention, certain terms are defined herein specifically as follows.

[0044] Unless stated to the contrary, any of the words “contains”, “containing”, "including," "includes," "comprising," and "comprises" mean "including without limitation" and shall not be construed to limit any general statement that it follows to the specific or similar items or matters immediately following it. Embodiments of the invention are not mutually exclusive, but may be implemented in various combinations. The described embodiments of the invention and the disclosed examples are given for the purpose of illustration rather than limitation of the invention as set forth in the appended claims. Further, words like “a”, “an”, “at least” and “the” should be construed to not only cover singular quantities but also plural quantities of the elements immediately following them.

[0045] For propose of this specification, the term “combustible substance” incorporates such substances which are generally dispersed by heating / burning the substance itself. More particularly, the term “combustible substance” covers heat dispersible insecticides, fragrances and disinfecting agents. The “combustible substance” is used as an “active ingredient”.

[0046] Described herein is a novel substrate coated combustible substance for delivery system that integrates active ingredient emanation with burning-aided materials coated on to the surface of a paper in which the coated portion will undergo smouldering to release active ingredient and leaving the uncoated paper. Alternatively, the substrate may be cut as per the coated shape which reduces wastage.

[0047] Accordingly, the invention provides a combustible composition for an active. The combustible composition is a unique formulation of materials which delivers a combustible substance by smouldering. This formulation is surface coated in a guided pathway to ensure a controlled and consistent release of the active ingredient, through smouldering which can effectively emit the combustible substance over an extended period.

[0048] Accordingly, the invention comprises of a burnable composition coated over a burnable substrate.

[0049] In an embodiment the substrate comprises of a virgin / recycled kraft paper with a GSM ranging from 80-500 (Preferably 80-180). Said paper provides adequate structural integrity and is suitable for deposition of the active-loaded formulation. In subsequent embodiment the combustible substance is a synthetic insecticidal composition comprises of;

[0050] 1. A Fillers;

[0051] 2. A Binding agents;

[0052] 3. A Smouldering agent ;

[0053] 4. A Preservative;

[0054] 5. A Fragrance and emulsifier and;

[0055] 6. A Synthetic Insecticidal active ingredients;

[0056] In accordance with the above embodiment, the Synthetic Insecticidal active ingredients is selected from renofluthrin, renofluthrin MUP, Dimefluthrin, Metofluthrin, Prallethrin, Meperfluthrin, Transfluthrin, D- allethrin, Heptafluthrin, S-Biothrin used in the range of 0.001% to 10 % (on 100% purity basis)

[0057] In another embodiment, the composition consists of an herbal insecticide;

[0058] 1. A Fillers;

[0059] 2. A Binding agents;

[0060] 3. A Smouldering agent ;

[0061] 4. A Preservative;

[0062] 5. A Fragrance and emulsifier and;

[0063] 6. A Herbal insecticidal actives;

[0064] In accordance with the above embodiment, the Herbal insecticidal actives is selected from Citronella, Pyrethrum, PMD, curcuma xanthoriza, Neem powder, vetiever root powder, tulsi, thymol, patchouli, Cinnamomum camphora, mustard oil lemongrass oil, lavender oil, Rosewood oil is present in the range of 0.5 to 20%.

[0065] In accordance with embodiments, the combustible substance is a fragrance, wherein the composition comprises of;

[0066] 1. A Fillers;

[0067] 2. A Binding agents; 3. A Smouldering agent ;

[0068] 4. A Preservative;

[0069] 5. An emulsifier; and

[0070] 6. A Fragrance.

[0071] Accordingly, the Fragrance is selected from sandalwood oil or synthetic fragrances in range of 0.1 to 30%.

[0072] In accordance with embodiments, the combustible substance is a disinfectant, wherein the composition comprises of;

[0073] 1. A Fillers;

[0074] 2. A Binding agents;

[0075] 3. A Smouldering agent ;

[0076] 4. A Preservative;

[0077] 5. An emulsifier; and

[0078] 6. A disinfectant

[0079] Accordingly, the disinfectant is a Natural disinfectant is present in the range of 0.5% to 20 %.

[0080] In accordance with any of the above embodiments, the filler is selected from wood dust, coconut shell powder, palm shell powder, walnut shell powder, tamarind kernel powder, charcoal powder, kaolin, calcite, jute powder, activated charcoal.

[0081] Further to the above embodiment the filler is in the range of 40 - 90%.

[0082] In accordance with any of the above embodiments, the Binding agent is selected from Jigget, guar gum, starch (modified, tapioca, maize, com, potato, tamarind etc.) powder, joss stick powder.

[0083] Further to the above embodiment the binding agent in the range of 5-25%. In accordance with any of the above embodiments, the Smouldering agent is an alkaline nitrate like potassium nitrate etc. in the range of 0.1 -5%.

[0084] In accordance with any of the above embodiments, the preservative is selected from Sodium benzoate, sodium metabisulphite in the range of 0.1-3%.

[0085] In accordance with any of the above embodiments the fragrance and emulsifier are oil in water emulsifiers like ethoxylates in the range of 0.2 - 5%.

[0086] In an embodiment, the invention provides a process for manufacturing the substrate coated coil of the invention. The process comprises of;

[0087] Take required amount of water, emulsifier, potassium nitrate, fragrance and active ingredients. This is phase A.

[0088] Solid phase

[0089] Add 200-500-micron sized powders of guar gum, modified starch, tamarind kernel powder, Jigget mix well. This is phase B

[0090] Add tamarind shell powder, wood dust, coconut shell powder, palm shell powder, walnut shell powder, charcoal powder, kaolin, calcite, jute powder, activated charcoal, sodium benzoate to form a phase C.

[0091] Add water into a high sheer in line mixture under RPM-500 and add emulsifier into the water mix thoroughly, add potassium nitrate, active ingredients and fragrance into the water and mix thoroughly.

[0092] Add phase B into the mixer to form thick slurry under mixing. To this slurry add phase C to form a uniform mass. b. Preparation of substrate Homogenous substrate of 80-190 g / m2 kraft or virgin or recycled / paper is selected as the substrate material. c. Substrate coating

[0093] Screen-printing technique using a screen supported stencil to form a layer of formulation with grammage of 1000 - 5000 GMS preferably 2000 GSM on a substrate in a desired pattern. The stencil is a water-based or lacquer-based emulsion attached to a plastic backing sheet which can be either hand-cut or photographically prepared to provide openings in the image areas for the formulation to pass, while remaining hard and durable in the non-image areas. The stencil can be either photo-stencil or hand-cut stencil.

[0094] The stencil is made by stretching a screen fabric, typically polyester, nylon, silk or metallic screens made up of aluminium, stainless steel, across a frame, and then coating the screen with a photosensitive emulsion. The mesh size ranges from 2 to 35 mesh. The diameters of the threads used are 30 to 500microns preferably 300 microns.

[0095] The stencil design is made up of the length in the range of 10 - 500 cm preferably 200 cm and the width of 0.5 mm to 10 mm preferably 4 mm. The stencil can either be photo stencil or handmade stencil. In the handmade stencil the thickness of the deposition depends on the thickness of the stencil. This process is on- contact printing in which the formulation, screen, stencil re in contact with each other. In the photo stencil the deposition is process is followed by off - contact printing, in which the deposition thickness depends on the gap present between the screen and the paper surface.

[0096] The formulation is then loaded into the reservoir and transferred on to the top of the screen. The paper is placed under the screen to allow the deposition of the formulation on its surface using a squeegee. When the paper is properly positioned, the printing stroke can be made, which essentially involves holding the squeegee at the appropriate squeeze angle and drawing it across the image area with a uniform pressure, speed.

[0097] The deposition of the formulation with specified thickness ranging from 1000 to 5000 GSM can be achieved by using screen printing. This can be achieved by other technologies like geometric printing, radius printing, rotary screen printing, carousel printing. d. Drying

[0098] After coating the material on to the surface of the substrate, drying of the paper is done through passing it through a conveyor belt into a chamber containing hot oven / natural drying / dehumidifier / hot air blowing. To remove the moisture present in it at the temperature of 25° - 80° c.

[0099] In an alternate process of manufacturing the active ingredient can be dosed, sprayed or dipped after drying on to the surface of the substrate. Sometimes not only the insecticidal active ingredient / fragrances / disinfectants can also be dosed. The weight of substrate coating can be increased or decreased depending on the requirement. It can affect the burning time, hardness, Properties of the format.

[0100] In an advantageous embodiment, the invention provides following benefits

[0101] A High efficacy of the insecticidal active.

[0102] A Sustainable innovation

[0103] A Economical

[0104] A Safe emissions

[0105] A Prolonged Protection

[0106] EXAMPLES

[0107] Several examples are set forth below to further illustrate the nature of the invention and the manner of carrying it out. However, the invention should not be considered as being limited to the details thereof.

[0108] Example 1:

[0109]

[0110] Method of manufacturing

[0111] 1. Preparation of slurry

[0112] Liquid phase -

[0113] 5 Take required amount of water, emulsifier, potassium nitrate, fragrance and active ingredients. This is phase A.

[0114] Solid phase Add 200-500-micron sized powders of guar gum, modified starch, tamarind kernel powder, Jigget mix well. This is phase B

[0115] Add tamarind shell powder, wood dust, coconut shell powder, palm shell powder, walnut shell powder, charcoal powder, kaolin, calcite, jute powder, activated charcoal, sodium benzoate to form a phase C.

[0116] Add water into a high sheer in line mixture under RPM-500 and add emulsifier into the water mix thoroughly, add potassium nitrate, active ingredients and fragrance into the water and mix thoroughly.

[0117] Add phase B into the mixer to form thick slurry under mixing. To this slurry add phase C to form a uniform mass. b. Preparation of substrate

[0118] Homogenous substrate of 80-190 g / m2 kraft or virgin or recycled / paper is selected as the substrate material. c. Substrate coating

[0119] Screen-printing technique using a screen supported stencil to form a layer of formulation with grammage of 5 - 5000 GMS preferably 2000 GSM on a substrate in a desired pattern. The stencil is a water-based or lacquer-based emulsion attached to a plastic backing sheet which can be either hand-cut or photographically prepared to provide openings in the image areas for the formulation to pass, while remaining hard and durable in the non-image areas. The stencil can be either photo-stencil or hand-cut stencil.

[0120] The stencil is made by stretching a screen fabric, typically polyester, nylon, silk or metallic screens made up of aluminium, stainless steel, across a frame, and then coating the screen with a photosensitive emulsion. The mesh size ranges from 2 to 35 mesh. The diameters of the threads used are 30 to 500microns preferably 300 microns.

[0121] The stencil design is made up of the length in the range of 10 - 500 cm preferably 200 cm and the width of 0.5 mm to 10 mm preferably 4 mm. The stencil can either be photo stencil or handmade stencil. In the handmade stencil the thickness of the deposition depends on the thickness of the stencil. This process is on- contact printing in which the formulation, screen, stencil are in contact with each other. In the photo stencil the deposition process is followed by off - contact printing, in which the deposition thickness depends on the gap present between the screen and the paper surface.

[0122] The formulation is then loaded into the reservoir and transferred on to the top of the screen. The paper is placed under the screen to allow the deposition of the formulation on its surface using a squeegee. When the paper is properly positioned, the printing stroke can be made, which essentially involves holding the squeegee at the appropriate squeeze angle and drawing it across the image area with a uniform pressure, speed.

[0123] The deposition of the formulation with specified thickness ranging from 1000 to 5000 GSM can be achieved by using screen printing. This can be achieved by other technologies like geometric printing, radius printing, rotary screen printing, carousel printing. d. Drying

[0124] After coating the material on to the surface of the substrate, drying of the paper is done through passing it through a conveyor belt into a chamber containing hot oven / natural drying / dehumidifier / hot air blowing. To remove the moisture present in it at the temperature of 25° - 80° c. In an alternate process of manufacturing the active ingredient can be dosed, sprayed or dipped after drying on to the surface of the substrate. Sometimes not only the insecticidal active ingredient but also fragrances / disinfectants can also be dosed. The weight of substrate coating can be increased or decreased depending on the requirement. It can affect the burning time, hardness, Properties of the format.

[0125] Bio-efficacy of the substrate with active ingredient.

[0126] The bio efficacy of the marketed samples can be compared with the current invention. The active ingredient is renofluthrin 0.1%. The culex mosquitoes which are common in India. The aedes which is a vector for deadly diseases like chikungunya, yellow fever etc. the effectiveness of the format can be compared against the standard market products that which contains “d-trans allethrin” can be performed in the peet grady chambers following the WHO protocol. The effectiveness can be measured in terms of the knockdown time or the KT 50. KT50 is the time taken for the 50% of the population to attain knockdown. This can vary depending upon the species used, protocols and the test conditions.

[0127] The knockdown was found to be

[0128] Smoke characterisation -

[0129] The raw material usage was reduced up to 6 times so the carbon monoxide emissions also reduced by 25 folds. Burning time -

[0130] The burning time of the coil is dependent on the length of the coil.

[0131] Process Flow chart

[0132] Mixing of ingredients

[0133] Preparation of slurry

[0134] Surface coating of slurry of substrate

[0135] Drying of surface coated of substrate

[0136] Cutting in the designated shape The invention allows for tuneable release designs. By adjusting the pathway design and formulation composition, the release rate of the active ingredient can be modulated to provide either high or low levels of active ingredient release into the surroundings.

Claims

We Claim,1. A composition for emanation comprising a. an active ingredient b. a Filler; c. a Binding agent, and d. a Smouldering agent, wherein, the composition is coated on to the surface of a substrate.

2. The composition as claimed in claim 1, wherein the substrate is a paper.

3. The composition as claimed in claim 2, wherein the paper is selected from virgin or recycled paper.

4. The composition as claimed in claim 2, wherein the GSM of the paper is in range of 80-500, preferably in range of 80-180.

5. The composition as claimed in claim 1, wherein the active ingredient is selected from a synthetic insecticide, an herbal insecticide, a fragrance and a disinfectant.

6. The composition as claimed in claim 1, wherein the composition comprises of; a. A Synthetic Insecticidal active ingredients b. the Fillers; c. the Binding agents, and d. the Smouldering agent.

7. The composition as claimed in claim 6, wherein the synthetic insecticide is selected from renofluthrin, Renofluthrin MUP, Dimefluthrin, Metofluthrin,Prallethrin, Meperfluthrin, Transfluthrin, D- allethrin, Heptafluthrin, S- Biothrin and combination thereof.

8. The composition as claimed in claim 6, wherein the synthetic insecticide is in the range of 0.001% to 10 % (on 100% purity basis).

9. The composition as claimed in claim 1, wherein the composition comprises of; a. A Herbal insecticidal actives; b. the Fillers; c. the Binding agents, and d. the Smouldering agent.

10. The composition as claimed in claim 9, wherein the herbal insecticide is selected from Citronella, Pyrethrum, PMD, curcuma xanthoriza, Neem powder, vetiever root powder, tulsi, thymol, patchouli, Cinnamomum camphora, mustard oil, lemongrass oil, lavender oil, Rosewood oil and combination thereof.

11. The composition as claimed in claim 9, wherein the herbal insecticide is in the range of 0.5 to 20%.

12. The composition as claimed in claim 1, wherein the composition comprises of; a. A Fragrance. b. the Fillers; c. the Binding agents, and d. the Smouldering agent.

13. The composition as claimed in claim 5, wherein the active ingredient is fragrance.

14. The composition as claimed in claim 12, wherein the fragrance is selected from sandalwood oil or synthetic fragrances.

15. The composition as claimed in claim 9, wherein the fragrance is in the range of 0.1 to 30%.

16. The composition as claimed in claim 1, wherein the composition comprises of; a. A disinfectant b. the Filler; c. the Binding agent, and d. the Smouldering agent.

17. The composition as claimed in claim 15, wherein the disinfectant is Natural disinfectant.

18. The composition as claimed in claim 15, wherein the disinfectant is in the range of 0.5% to 20 %.

19. The composition as claimed in any of the above Claim, wherein the filler is selected from wood dust, coconut shell powder, palm shell powder, walnut shell powder, tamarind kernel powder, charcoal powder, kaolin, calcite, jute powder, activated charcoal or combination thereof.

20. The composition as claimed in claim 19, wherein the filler is in the range of40 - 90%.

21. The composition as claimed in any of the above Claim, wherein the Binding agent is selected from Jigget, guar gum, starch powder selected from modified, tapioca, maize, corn, potato, tamarind and joss stick powder or combination thereof.

22. The composition as claimed in claim 21, wherein the Binding agent is in the range of 5-25%.

23. The composition as claimed in any of the above Claim, wherein the Smouldering agent is alkaline nitrate like potassium nitrate.

24. The composition as claimed in claim 23, wherein the Smouldering agent is in the range of 0.1 -5%.

25. The composition as claimed in any of the above Claims, wherein the composition further comprises a preservative, a fragrance and optionally an emulsifier.

26. The composition as claimed in claim 25, wherein the preservative is selected from Sodium benzoate and / or sodium metabisulphite in the range of 0.1-3%.

27. The composition as claimed in claim 25, wherein the fragrance is in range of 0.2 - 5%.

28. The composition as claimed in claim 25, wherein the emulsifier are oil in water emulsifiers in the range of 0.2 - 5%.

29. A process for manufacturing a substrate coated coil as claimed in claim 1 comprises of following steps:Step a: Mixing required amount of emulsifier, smouldering agent, fragrance and active ingredients in water through a high sheer in line mixture under RPM-500;Step b: adding required amount of binder to the mixture of Step a to form a slurry;Step c: adding required amount of filler; to the slurry of Step b to form a uniform mass;Step d: Screen-printing the mass of Step c on to a homogenous substrate using a stencil;Step e: drying the substrate of Step d at the temperature of 50° - 80° c.

30. The process as claimed in claim 29, wherein the Step d comprises of; i. Placing the substrate under a screen; ii. Loading the formulation of Step c into the reservoir, and iii. Stencilling the formulation of Step ii on substrate of Step d under the screen to allow the deposition of the formulation on its surface using a squeegee.

31. The process as claimed in claim 30, wherein the Stencil is photo-stencil or hand-cut stencil.

32. The process as claimed in claim 32, wherein the stencil design length is in the range of 10 - 500 cm preferably 200 cm and the width of 0.5 mm to 10 mm preferably 4 mm.

33. The process as claimed in claim 30, wherein the printing can be achieved by geometric printing, radius printing, rotary screen printing, carousel printing.

34. The composition as claimed in claim 1, wherein the substrate is a slow burning solid material.

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