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.
Title translation:VERFAHREN ZUR SENKUNG VONSCHMELZVISKOSITÄTUND VERBESSERUNG DER HEISSVERSIEGELBARKEIT VON POLYESTER UND ZUR HERSTELLUNG EINES HEISSVERSIEGELTENBEHÄLTERS
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.
Abstract:
Un método para mejorar la capacidad de termosellado de un poliéster, caracterizado por que una capa de revestimiento de poliéster que contiene polilactida (PLA) sobre un sustrato fibroso que comprende papel, cartulina o cartón se somete a la radiación con haz de electrones (EB), disminuyendo así la viscosidad en estado fundido del revestimiento.
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.