Patent ID: 11912839
Assignee: SAM BU FINE CHEMICAL CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A hot melt film containing thermoplastic polyurethane (TPU) resin, which includes biomass based TPU resin, comprising:
wherein the thermoplastic polyurethane resin composition comprises 20 to 70% by weight of a biomass-based TPU resin produced by reacting a biomass-derived polyol with a diol-based chain extender and diisocyanate, and a hydrophobic nano-silica organically treated on the surface of nano-silica particles having a size in a range of 1 to 100 nm in a range of 0.1 to 5 parts per hundred resin (phr),
wherein the hydrophobic nano-silica is formed in a nano-silica aggregate state having a uniform aggregate size of 100 to 1200 nm on average,
wherein the thermoplastic polyurethane resin composition is formed into a film with a thickness in a range of 0.02-0.3 mm.