Abstract
The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous- based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.
Original language | English |
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Patent number | CN105934471 |
IPC | B65D 65/ 38 A I |
Priority date | 22/01/15 |
Publication status | Published - 7 Sept 2016 |
Publication type | H1 Granted patent |