DESC:PROCESS FOR SURFACE TREATMENT OF PAPER AND PAPERBOARDS ,CLAIMS:1. A process for transferring a surface treatment formulation (210) onto a base paper (220), the process comprising:
applying at least one layer of the surface treatment formulation (210) on a non-absorbent film (204) to form a treated substrate (218); and
transferring the surface treatment formulation (210) from the treated substrate (218) to the base paper (220), to make a treated base paper (226), wherein surface energy of the surface treatment formulation (210) is less than surface energy of the non-absorbent film (204) and surface energy of the base paper (220).
2. The process as claimed in claim 1, wherein the base paper (220) is made of an absorbent material.
3. The process as claimed in claim 1, wherein the non-absorbent film (204) is a polymeric film having an adsorbent surface.
4. The process as claimed in claim 1, wherein the non-absorbent film (204) is one of a Poly Ethylene Terephthalate (PET) film, a Low Density Poly Ethylene (LDPE) film, and a treated LDPE film.
5. The process as claimed in claim 1, wherein the surface treatment formulation (210) comprises one of a film forming substance, a non-film forming substance, and a combination of the film forming substance and the non-film forming substance.
6. The process as claimed in claim 1, wherein the the surface treatment formulation (210) is one of an aqueous based formulation and a non-aqueous based formulation.
7. The process as claimed in claim 5, wherein the film forming substance is at least one of polysaccharides, poly vinyl acetates, Polyvinyl Alcohol (PVA), Propylene Glycol (PG), humectants, alginates, starch, and gums.
8. The process as claimed in claim 5, wherein the non-film forming substance is at least one of synthetic substance and natural nanoparticle substance.
9. The process as claimed in claim 8, wherein the natural nanoparticle substance includes organic compounds comprising latexes, Styrene Maleic Anhydrides (SMA), Styrene Maleic Imides (SMI), inorganic sols (silicates, Aluminates), and laminar (clay) compounds.
10. The process as claimed in any one of claims 1-9, wherein the surface energy of the non-absorbent film (204) is less than the surface energy of the base paper (220).
11. A process for making a low ignition propensity (LIP) cigarette paper (106), the process comprising:
applying at least one layer of a surface treatment formulation (210) on a non-absorbent film (204), at discrete locations, to form a treated substrate (218); and
transferring the surface treatment formulation (210) from the treated substrate (218) to a base paper (220) by passing the treated subsrate (218) and the base paper (220) between nip rolls (224) in contact with each other, to make the LIP cigarette paper (106).
12. The process as claimed in claim 11, wherein the at least one layer of the surface treatment formulation (210) is applied in a predefined pattern including one or more bands (108).
13. The process as claimed in claim 11, wherein the at least one layer of the surface treatment formulation (210) has a dry weight in a range of 4 grams per square metre (gsm) to 15 grams per square metre (gsm).
14. The process as claimed in claim 11, wherein the surface treatment formulation (210) is prepared with an aqueous solution of 30 percent of precipitated calcium carbonate and 10 percent of Poly Vinyl Alcohol.
15. The process as claimed in claim 14, wherein the precipitated calcium carbonate has median particle size in a range of 0 micrometre (µm) to 5 micrometre (µm).
16. The process as claimed in claim 11, wherein the LIP cigarette paper (106) has porosity in a range of 3 Coresta units to 20 Coresta units in the discrete locations.
17. The process as claimed in claim 11, wherein the LIP cigarette paper (106) has diffusity in a range of 0 centimeter per second (cm/s) to 0.5 centimeter per second (cm/s).
18. The process as claimed in claim 11, wherein the LIP cigarette paper (106) has diffusity in a range of 0 centimeter per second (cm/s) to 0.25 centimeter per second (cm/s).
19. The process as claimed in claim 11, wherein the LIP cigarette paper (106) has diffusity in a range of 0 centimeter per second (cm/s) to 0.1 centimeter per second (cm/s).
20. The process as claimed in claim 11, wherein surface energy of the non-absorbent film (204) is at least 38 dynes per centimeter.
21. The process as claimed in claim 11, wherein the base paper (220) has porosity in a range of 50 Coresta units to 100 Coresta units.
22. The process as claimed in claim 11, wherein the base paper (220) has diffusity in a range of 0.6 centimeter per second (cm/s) to 1.5 centimeter per second (cm/s).