DESC:Title:

Improved water soluble film and method of making the same.

Field of Invention:

The present invention relates to water soluble film, and more particularly to improved water soluble film incorporated with graphene that can achieve excellent mechanical properties and shows better water solubility and method of making an improved water soluble film thereof..

Background of the Invention:

Water-soluble films (WSF) are well known in the art. Water-soluble films have many applications, including non-edible forms and edible forms. Non-edible forms are used as packaging materials. Water soluble film may also be used for non human contact packaging for hazardous material such as agrochemicals, fertilizers etc. , whereas edible forms are those, wherein the film itself is or makes up an edible article. Edible films are known for uses such as delivery of therapeutic agents, breath freshening agents, and flavors.
When an ingredient is provided in a traditional packaged state, the package must be torn or otherwise opened to remove the contents prior to end application. This is not only troublesome, but also has the disadvantage that the contents can tend to spill at the time of opening the packages, especially when they are in powder or liquid form, One solution is to package such contents with awater soluble film, If the packaging material is soluble in water, simply pouring water over it or immersing it in the water, can dissolve the package, thus enabeling omission of the step of peeling and discarding the protective films.. Therefore, it is highly desirable to package food contents with such a film for safe, precise and environment friendly packaging.
JP 2003-171521 A, discloses a technique of improving the water solubility by adding a hydrazine compound and a polybasic acid or an alkali metal salt thereof to a polyvinyl alcohol resin. However, according to the technique of JP 2003-171521 A, the film disadvantageously exhibits poor processability upon packaging chemicals due to its low flexibility and has insufficient water solubility, especially resulting in a long dissolution time thereof.
Similarly, JP 2005-179390 A discloses a water-soluble film prepared by adding a plasticizer and sulfite to a polyvinyl alcohol resin. Such a film suffers less coloring upon film formation or less coloring with time due to contact with chemicals. However, addition of sulfite to a water-soluble film cannot shorten the dissolution time. In addition, sulfite may react with a weak acid to generate sulfur dioxide gas, which causes offensive odors from the water-soluble film.
Various water-soluble films known in the prior art as disclosed above have one or more deficiencies, many a times it has been seen that, mechanical property of water soluble film have been found to be of an inferior quality when compared to non-water soluble film. Therefore in order to overcome this drawback, there is a need to provide an improved water soluble film that can achieve excellent physical and mechanical strength such as tensile strength and that shows better water solubility.

Object of the Invention:

The primary objective of the present invention is to provide an improved water soluble film.
Another objective of the present invention is to provide an improved water soluble film incorporated with graphene as defined.
Yet another objective of the present invention is to provide an improved water soluble film with superior physical and mechanical properties.
Yet another objective of the present invention is to provide an improved water soluble film with that can achieve excellent higher tensile strength and better water solubility.
Yet another objective of the present invention is to provide a process of manufacturing an improved water soluble film.
Yet another objective of the present invention is to provide a process of manufacturing an improved water soluble film incorporated with graphene.
Yet another objectiveof the present invention is to replace the existing water soluble film for specific end user, like but not limited to laser film, films for air line windows, thermal conductive products, anti freeze products, electromagnetic properties based end user, thermo formable products and packaging film to package highly acidic or alkaline materials.
Yet another objective of the present invention is to combine the properties of graphene with the properties of water soluble film to obtain a superior quality of graphene based water soluble film.

Summary of the Invention:

One aspect of the present invention relates to providing an improved water soluble film incorporated with graphene comprising of;
water soluble films batch, wherein said water soluble films batch is prepared by mixing water soluble resins ranging from 60-85%, plasticizers ranging from 5 to 20%, fillers ranging from 1 to 2% and expecients ranging from 0.5 to 1%;
Characterized in that
water soluble films batch at a concentration of 90 to 99.9%; and
graphene nano particles solution at a concentration of 0.1 to 1%; are mixed together to forms an improved water soluble film that can achieve excellent mechanical properties and better water solubility.
Another aspect of the present invention relates to a method of preparing an improved water soluble film incorporated with graphene consisting the steps of;
preparing water soluble film batch, wherein said water soluble films batch is prepared by mixing water soluble resins ranging from 60-85%, plasticizers ranging from 5 to 20%, fillers ranging from 1 to 2% and expecients ranging from 0.5 to 1%;
adjusting the water soluble films batch obtained, at a concentration of 90 to 99.9%;
preparing graphene nano particles solution by dissolving 0.1 % to 1% graphene nano particle conc., by weight basis in 20gm water;
adding graphene nano particles solution that ranges from 0.1% to 1% to water soluble film batche that ranges from 90 to 99.9% ;
mixing the said solution at low speed at room temperature;
sonicating the said solution obtained for 15 mins, so that the graphene nano particles forms a homogeneous mixture with the water soluble film batch, so as to obtain an homogeneous mixture of water soluble graphene; and
Casting the homogeneous mixture of water soluble graphene using various films forming method to form an improved water soluble film.
Detailed Description of the Invention:
The following detailed description illustrates the invention by way of example and not by way of limitation. The description enables one skilled in the art to make and use the present disclosure, and describes several embodiments, adaptations, variations, alternatives, and uses of the present disclosure, including what is presently believed to be the best mode of carrying out the present disclosure
One aspect of the present invention relates to an improved water soluble film, more particularly, to water soluble film incorporated with graphene. .
The present invention aims to enhance the property of water soluble film, by incorporating the superior feature of graphene to obtain a much stronger and durable water soluble film, that exhibits superior mechanical propertiesThe present invention, relates to an improved water soluble film, that can achieve excellent physical and mechanical properties (for example higher tensile strength) and show better water solubilitywhen compared to already available water soluble film or non-water soluble film existing in the market.
The present invention more specifically relates to an improved water soluble film incorporated with graphene comprising of :water soluble films batch, wherein said water soluble films batch is prepared by mixing water soluble resins, plasticizers, fillers and expecients; wherein water soluble films batch at a concentration of 90 to 99.9% and graphene nano particles solution at a concentration of 0.1 to 1% are mixed together to forms an improved water soluble film.
Graphene is a one-atom-thick layer of carbon atoms arranged in a hexagonal lattice. In more complex terms, graphene is an allotrope of carbon in the form of a plane of sp2-bonded atoms with a molecular bond length of 0.142 nanometers. Layers of graphene stacked on top of each other form graphite, with an interplanar spacing of 0.335 nanometers. The separate layers of graphene in graphite are held together by VanDer Waals forces.It is the building-block of Graphite, with a multitude of astonishing properties which repeatedly earn it the title “wonder material”.Graphene is an extremely diverse material, and can be combined with other elements to produce different materials with various superior properties.Graphene is also one of the strongest materials with a tensile strength of 130 GPa (gigapascals), which is more than 100 times stronger than steel.Graphene’s incredible strength despite being so thin is much sought after property in many fields, including the field of packaging and therefore forms the best choice for increasing the physical and mechanical property of water-soluble films. However, the unique properties of graphene do not end there. It is also flexible, transparent, highly conductive, and seemingly impermeable to most gases and liquids.
The present invention, discloses an improved water-soluble films made of a homogeneous mixture of water soluble film batch and graphene nano particles solution, wherein water soluble film batches is prepared by mixing water soluble resins, plasticizers, fillers and other expecients. Water soluble resin preferably ranges from 60 to 85%, plasticizers preferably ranges from 5 to 20%, fillers preferably ranges from 1 to 2% and other expecients preferably ranges from 0.5 to 1%. Once the water soluble film batch is obtained, the % solid content of the water soluble film batch is then adjusted in the range of 5% to 99.9%, preferably in the range of 10 to 70% , more preferably in the range of 20 to 60%.
Graphene nano particles solution is prepared by dissolving 0.1 % to 1% graphene graphene nano particles conc.by weight basis in 20gm water; said graphene nano particles solution thus obtained is added at a ranges of 0.1% to 1% to water soluble film batche at a ranges of 90 to 99.9% ; said mixture is mixed and sonicated together to forms an improved water soluble film that can achieve excellent mechanical properties and better water solubility.
Optionally Water-Soluble Resins is blended alone or with a wide variety of other polymers. wherein the water soluble resins can be formed into flexible films both by thermoplastic processing and casting techniques. Such films may be made of non-edible or edible grade film-forming polymeric materials.
Non edible materials may be selected from, but not limited to, polyvinyl alcohol, copolymer ionomers, polyvinyl alcohol homopolymer, non-ionomeric poly vinyl alcohol polymer, polymethacrylate, Poly Vinyl Alcohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane.
Edible materials may be selected from, but not limited to, polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum arabic, pullulan or dextrin or water-soluble cellulose derivatives such as methyl cellulose, hydroxyl propyl cellulose, hydroxyl propyl methyl cellulose, hydroxyl propyl ethyl cellulose, hydroxy ethyl cellulose or carboxyl methyl cellulose or combination thereof. Optionally, the water-soluble films are edible.
Plasticizers may be selected from, but not limited to ,PEG, PPG, diethylene glycol, trietylene g lycol, propylene glycol, dipropylene glycol, pentaerythritol, polyethylene glycol, polypropylene glycol, bisphenol A, bisphenol S, N-methylpyrrolidone, sorbitol, mannitol, xylitol, 2,3-butanediol, 1,3-butanediol, reducing maltose starch syrups, reducing lactose, reducing starch syrup (reducing starch saccharified product), and the like.
Fillers may be selected from, but not limited to, starch, melamine resin, polymethyl (meth)acrylate resin, polystyrene resin, biodegradable resins such as polylactic acid and rice starch.
The water-soluble films of one aspect of the disclosure can be particularly advantageous in that they can be designed such that the transparency of the water-soluble film is maintained for long periods of time. The water soluble films of the disclosure herein can have one or more, optional advantages including thermoformability (e.g., into packets) and suitable toughness for use as packaging materials. For example, optional edible embodiments can be designed according to the disclosure herein to have suitable robustness, e.g. for use as packaging.
In particular, water soluble films incorporated with graphene according to one of the embodiments of the disclosure have demonstrated unexpected advantageous tear strength and further better solubility properties.
Graphene nano particle solution to be used as disclosed in the present invention is an aqueous, homogeneous, black liquid with variable graphene nano particle concentration. Graphene nano particle solution prepared is selected from graphene flaks, graphene ink paste, graphene ink, graphene nano particle concentration, graphene solution.
Graphene nano particle solution is prepared by bath sonication of natural graphite flakes in ethanol/water mixtures. Sonication is a process wherein sound waves are used to agitate particles in solution. Such disruptions can be used to mix solutions, speed the dissolution of a solid into a liquid (like sugar into water), and remove dissolved gas from liquids.
An improved water soluble film incorporated with graphene comprising of:
water soluble films batch, wherein said water soluble films batch is prepared by mixing water soluble resins ranging from 60-85%, plasticizers ranging from 5 to 20%, fillers ranging from 1 to 2% and expecients ranging from 0.5 to 1%;
Characterized in that
water soluble films batch at a concentration of 90 to 99.9%; and
graphene nano particles solution at a concentration of 0.1 to 1%; are mixed together to forms an improved water soluble film that can achieve excellent mechanical properties and better water solubility.
(Graphene based water soluble film herein is referred as G-WSF).
Another aspect of the present invention relates to a method of preparing an improved water soluble film incorporated with graphene that can achieve excellent mechanical properties and shows better water solubility.
Wherein the improved water soluble film incorporated with graphene is prepared by:
preparing water soluble film batch, wherein said water soluble films batch is prepared by mixing water soluble resins ranging from 60-85%, plasticizers ranging from 5 to 20%, fillers ranging from 1 to 2% and expecients ranging from 0.5 to 1%;
adjusting the water soluble films batch obtained, at a concentration of 90 to 99.9%;

preparing graphene nano particles solution by dissolving 0.1 % to 1% graphene nano particle conc., by weight basis in 20gm water;
mixing the said solution at low speed at room temperature;
Sonicating the mixed solution for 15 mins, so that the aqueous graphene forms a homogeneous mixture with the water soluble film batch, wherein sonication process is used to exfoliate Graphene Oxide layers by pushing solvent molecules in between the layers. When higher the sonication strength, the more intense will be the mechanical energy and greater are the disruption of Graphene layer, so as to obtain an homogeneous mixture of water soluble graphene; and
Casting the homogeneous mixture of water soluble graphene using various films forming method such as casting, gravure, mayer bar, etc to form an improved water soluble film.
The improved film may be formed using various contact or non-contact method, to make water soluble films.
The applicant further provides various analysis of composition of improved water soluble film incorporated with different graphene nano particle concentration in order to better understand the novelty of the present invention:
Further, experiments were carried out with water soluble film incorporated with graphene at various concentration, to find out the optimum film concentration according to the application or purpose of use.
Experiment 1:
Once plurality of water soluble film batch is prepared, said water soluble film batch are mixed with various concentration of graphene nano particle solution to form an improved water soluble film for further analysis.
Wherein water soluble films batch obtained, at a concentration of 90 to 99.9%;
preparing graphene nano particles solution by dissolving 0.1 % to 1% graphene nano particle conc., by weight basis in 20gm water;
Sample 1A denotes the standard available water soluble film at a concentration of 100% , without addition of grapene.
Sample 1B denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.99%, with addition of 0.01 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film.
Sample 1C denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.975%, with addition of 0.025 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film.
Sample 1D denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.95%, with addition of 0.05 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film.
Sample 1E denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.925%, with addition of 0.075 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film.
Sample 1F denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.9%, with addition of 0.1 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film.
Experimental table shown below indicates the composition and percentage to prepare the improved water soluble film incorporated with graphenenano particles solution.
DOE for Properties studies of WSF film 20% Solid content with different graphene loading

Batch no. 1A 1B 1C 1D 1E 1F
Ingredients
WSF batch 100 99.99 99.975 99.95 99.925 99.9
Graphene 0 0.01 0.025 0.05 0.075 0.1
Total 100 100 100 100 100 100
1% Graphene Sol. Of graphene paste prepared by weight basis in 20gm water.
Sonication time (mins.) 0 15 15 15 15 15

Also further analysis were carried out, to understand the physical and mechanical properties such as Film Thickness , % of Moisture , Disintegration , Dissolution , tensile strength, Elongation and Modulus @ 50% of the improved water soluble film.
Experimental analysis, carried out to demonstrate the physical properties and mechanical strength of the improved water soluble film. Further, these physical and mechanical properties obtained where then compared with the existing water soluble film existing in the market.
The result are as follows:
Experiment 2:
Day-1 Test Results
Test Parameters 1A 1B 1C 1D 1E 1F
Film Thickness (µ) 35-40 35-40 35-40 30-40 35-40 35-40
Moisture (%) 10.5 9.5 10.5 10 10.5 10
Disintegration (Sec) 11 10 11 13 13 13
Dissolution (Sec) 27 26 28 31 32 33
T.S. (N/mm2) 26.7 28.1 29.9 31.1 32.3 33.2
Elongation (%) 240 227.6 222.6 225.2 235.9 243.7
Modulus @ 50% (Mpa) 11.7 12.5 12.4 12.5 12.1 12.5
Sample 1A denotes the standard available water soluble film at a concentration of 100% , without addition of grapene, wherein Film Thickness is found to be 35-40 µ; Moisture is found to be 10.5%; Disintegration is found to be 11 sec; Dissolution is found to 27 sec; Tensile strength is found to be 26.7 N/mm2; Elongation is found to be 240%; and Modulus @ 50 % is found to be 11.7%
Sample 1B denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.99%, with addition of 0.01 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film, wherein
Film Thickness is found to be 35-40 µ; Moisture is found to be 9.5 %; Disintegration is found to be 10 sec; Dissolution is found to 26 sec; Tensile strength is found to be 28.1 N/mm2; Elongation is found to be 227.6%; and Modulus @ 50 % is found to be 12.5%
Sample 1C denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.975%, with addition of 0.025 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film, wherein
Film Thickness is found to be 35-40 µ; Moisture is found to be 9.5 %; Disintegration is found to be 10 sec; Dissolution is found to 28 sec; Tensile strength is found to be 29.9 N/mm2; Elongation is found to be 222.6%; and Modulus @ 50 % is found to be 12.4%
Sample 1D denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.95%, with addition of 0.05 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film, wherein
Film Thickness is found to be 30-40 µ; Moisture is found to be 10 %; Disintegration is found to be 13 sec; Dissolution is found to 31 sec; Tensile strength is found to be 31.1 N/mm2; Elongation is found to be 225.2%; and Modulus @ 50 % is found to be 12.5%
Sample 1E denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.925%, with addition of 0.075 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film, wherein
Film Thickness is found to be 35-40 µ; Moisture is found to be 10.5 %; Disintegration is found to be 13 sec; Dissolution is found to 32 sec; Tensile strength is found to be 32.3 N/mm2; Elongation is found to be 235.9%; and Modulus @ 50 % is found to be 12.1%
Sample 1F denotes the water soluble film as disclosed by the present invention, wherein concentration of water soluble film batch is adjusted at 99.9%, with addition of 0.1 % of graphene, said mixture is sonicated for 15 mins to form a homogneous mixture of improved water soluble film, wherein
Film Thickness is found to be 35-40 µ; Moisture is found to be 10 %; Disintegration is found to be 13 sec; Dissolution is found to 33 sec; Tensile strength is found to be 33.2 N/mm2; Elongation is found to be 243.7%; and Modulus @ 50 % is found to be 12.5%
In experimental 2, it can be clearly seen that water soluble film incorporated with graphene as denoted as Sample 1B to Sample 1F, surprisingly exhibits superior physical and mechanical properties, in terms of Moisture content , better Disintegration , better Dissolution , better elongation, better tensile strength and modulus when compared with already existing water soluble film as indicated in Sample 1A.Although thickness of the water soluble film of Sample 1B to Sample 1F remains almost the same as Sample 1A.
Thus it can be concluded from the present invention when compared to the standard available water soluble film as indicated in Sample 1A, that as graphene concentration increases (in sample 1B to Sample 1F) in the water soluble film from 0.01-0.1%, Tensile Strength improves from 28.1 to 33.2 N/mm2, with improved elongation property of the film between 227.6 to 243.7%, further Modulus was found to be 12.5%. Further, slight elevation is observed in Dissolution and disintegration properties of the film as graphene conc. increases.Whereas thickness of film remains almost unchanged through out Sample A to Sample F.
The above description is intended to describe the preferred embodiments of the invention in sufficient detail to enable those skilled in the art to practice the invention. The above description is intended to be illustrative and should not be interpreted as limiting the scope of the invention. Those skilled in the art to which the invention relates will appreciate that many variations of the described example implementations and other implementations exist within the scope of the claimed invention.

,CLAIMS:We claim:

1. An improved water soluble film incorporated with graphene comprising of:
water soluble films batch, wherein said water soluble films batch is prepared by mixing water soluble resins, plasticizers, fillers and expecients;
Characterized in that
water soluble films batch at a concentration of 90 to 99.9%; and
graphene nano particles solution at a concentration of 0.1 to 1%; are mixed together to forms an improved water soluble film that can achieve excellent mechanical properties and better water solubility.

2. The improved water soluble film as claimed in claim 1, wherein water-soluble resin is selected from but not limited to polyvinyl alcohol copolymer ionomers, polyvinyl alcohol homopolymer, non-ionomeric poly vinyl alcohol polymer, polymethacrylate, Poly Vinyl Alcohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane or combination thereof.

3. The improved water soluble film as claimed in claim 1, wherein water-soluble resin is selected from but not limited to polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum arabic, pullulan or dextrin or water-soluble cellulose derivatives such as methyl cellulose, hydroxyl propyl cellulose, hydroxyl propyl methyl cellulose, hydroxyl propyl ethyl cellulose, hydroxy ethyl cellulose or carboxyl methyl cellulose or combination thereof.

4. The improved water soluble film as claimed in claim 1, wherein plasticizers may be selected from, but not limited to ,PEG, PPG, diethylene glycol, trietylene g lycol, propylene glycol, dipropylene glycol, pentaerythritol, polyethylene glycol, polypropylene glycol, bisphenol A, bisphenol S, N-methylpyrrolidone, sorbitol, mannitol, xylitol, 2,3-butanediol, 1,3-butanediol, reducing maltose starch syrups, reducing lactose, reducing starch syrup (reducing starch saccharified product), and the like.

5. The improved water soluble film as claimed in claim 1, wherein fillers may be selected from, but not limited to, starch, melamine resin, polymethyl (meth)acrylate resin, polystyrene resin, biodegradable resins such as polylactic acid and rice starch.

6. The improved water soluble film as claimed in claim 1, wherein graphene solution is selected from graphene flaks, graphene ink paste, graphene ink, graphene nano particle concentration, graphene solution.

7. The improved water soluble film as claimed in claim 1, wherein the water soluble resins ranges from 60-85%, plasticizers ranges from 5 to 20%, fillers ranges from 1 to 2% and expecients ranges from 0.5 to 1%.

8. The improved water soluble film as claimed in claim 1, wherein the % solid content of water soluble film batch is in the range of 5% to 90%, preferably in the range of 10 to 70% , more preferably in the range of 20 to 60%,

9. An improved water soluble film incorporated with graphene consisting the steps of :
preparing water soluble film batch, wherein said water soluble films batch is prepared by mixing water soluble resins ranging from 60-85%, plasticizers ranging from 5 to 20%, fillers ranging from 1 to 2% and expecients ranging from 0.5 to 1%;
adjusting the water soluble films batch obtained, at a concentration of 90 to 99.9%;
preparing graphene nano particles solution by dissolving 0.1 % to 1% graphene nano particle conc., by weight basis in 20gm water;
adding graphene nano particles solution that ranges from 0.1% to 1% to water soluble film batche that ranges from 90 to 99.9% ;
mixing the said solution at low speed at room temperature;
sonicating the said solution obtained for 15 mins, so that the graphene nano particles forms a homogeneous mixture with the water soluble film batch, so as to obtain an homogeneous mixture of water soluble graphene; and
Casting the homogeneous mixture of water soluble graphene using various films forming method to form an improved water soluble film.

10. The process as claimed in claim 8, wherein batches of water soluble resin is prepared by POLYOX Water-Soluble Resins alone or blended with a wide variety of other polymers, such as polyethylene, polystyrene, polycaprolactone, ethylene vinyl acetate, nylon, etc.

11. The process as claimed in claim 8, wherein water-soluble resin can be made of non-edible or edible grade film-forming polymeric materials.

12. The process as claimed in claim 8, wherein non-edible water-soluble resin prepared can be selected from polyvinyl alcohol copolymer ionomers, polyvinyl alcohol homopolymer, non-ionomeric poly vinyl alcohol polymer, polymethacrylate, Poly Vinyl Alcohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane or combination thereof.

13. The process as claimed in claim 8, wherein edible water soluble resin prepared can be selected from polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum arabic, pullulan or dextrin or water-soluble cellulose derivatives such as methyl cellulose, hydroxyl propyl cellulose, hydroxyl propyl methyl cellulose, hydroxyl propyl ethyl cellulose, hydroxy ethyl cellulose or carboxyl methyl cellulose or combination thereof.

14. The process as claimed in claim 8, wherein graphene nano particle solution is prepared by bath sonication of natural graphite flakes in ethanol/water mixtures.

15. The process as claimed in claim 8, wherein casting of the improved water soluble film may be done using contact or non-contact coating process.

16. The process as claimed in claim 8, wherein casting of the improved water soluble film may be done using casting, gravure, mayer bar, etc

17. The process as claimed in claim 8, wherein physical properties such as Film Thickness, % of Moisture elongation and modulus is determined.

18. The process as claimed in claim 8, wherein mechanical properties such as tensile strength , disintegration and dissolution is determined.

19. The process as claimed in claim 8, wherein the thickness of the water soluble film has been found to be in the ranges of 35-40µ.

20. The process as claimed in claim 8, wherein the tensile strength of the improved water soluble film has been found to be in the range of 28.1 to 33.2N/m2.

21. The process as claimed in claim 8, wherein the elongation of the improved water solube film has been found to be in the range of227.6-243.7%.

22. The process as claimed in claim 8, wherein the Modulus of the improved water soluble film has been found to be in the range of 12.1-12.5 Mpa.

23. The process as claimed in claim 8, wherein disintegration of the improved water soluble film has been found to be in the range of 10-13 in seconds.

24. The process as claimed in claim 8, wherein dissolution of the improved water soluble film has been found to be in the range of 26-33 in seconds.

25. The process as claimed in claim 8, wherein moisture of the improved water soluble film has been found to be in the range of 9.5-10.5%.