Biodegradable and compostable multilayer film
AssigneeCreative Plastics
InventorsPrakash Rasiklal Dhariwal, Milind Ganesh Bhole, Sharad Shrikant Kulkarni
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Abstract
The present disclosure provides a biodegradable and compostable multilayer film. The biodegradable and compostable multilayer film comprises a sealant product side layer comprising at least one slip additive and having a pre-determined co-efficient of friction, an outer surface layer, and at least one intermediate layer disposed between the sealant product 5 side layer and the outer surface layer. The biodegradable and compostable multilayer film of the present disclosure has good mechanical properties and is non-reactive with tobacco based products, medicines, and food products to be packaged.
Claims13
A biodegradable and compostable multilayer film having a thickness in the range of 12 μm to 300 μm comprising:
- a sealant product side layer:
- comprising at least one slip additive;
- and
- having a pre-determined co-efficient of friction;
- an outer surface layer;
- and
- at least one intermediate layer disposed between said sealant product side layer and said outer surface layer;
- wherein, each of said sealant product side layer, said outer surface layer and said at least one intermediate layer comprises a blends having the density in the range of 1.22 to 1.28 gm per cc, said blends independently selected from the group consisting of:
- a first blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said first blend having a melt temperature in the range of 165° C. to 190° C.;
- a second blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said second blend having a melt temperature in the range of 190° C. to 200° C.;
- a third blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said third blend having a melt temperature in the range of 165° C. to 170° C.;
- a fourth blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said fourth blend having a melt temperature in the range of 180° C. to 190° C.;
- a fifth blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said fifth blend having a melt temperature in the range of 175° C. to 195° C.;
- and
- a sixth blend of polylactic acid and a copolyester of 1,4-butanediol, adipic acid, and terephthalic acid, wherein said sixth blend having a melt temperature in the range of 180° C. to 200° C.,
- in a way that said biodegradable and compostable multilayer film comprises at least three layers each having separately at least one of said blends in an amount in the range of 1 wt % to 99 wt %, wherein said sealant product side layer comprises any three blends present in the proportion of 70:20:10 by weight percent, said intermediate layer comprises said first and said second blend in the proportion of 90:10 by weight percent and said outer surface layer comprises any three blends present in the proportion of 70:20:10 by weight percent for extrusion on three different extruders.
Dependencies are inferred from the claim text.