Method for Producing Biodegradable Polyester Filament with Enhanced Biodegradation Characteristics

Abstract

The present invention discloses a method for producing biodegradable, substantially continuous filaments for nonwoven fabric applications, particularly in disposable personal protective equipment (PPE). The method involves incorporating a biodegradable additive into a polyester polymer matrix to enhance biodegradation properties while maintaining structural integrity. By utilizing a modified dual hopper feed system within a meltblown pilot line, the biodegradable additive and meltblown granules are pre-mixed and combined with high-flow polypropylene granules to ensure optimal processing conditions. This innovative approach resolves existing challenges in enhancing the biodegradability of polyester-based nonwoven fabrics, offering a sustainable solution with improved environmental impact and product performance.20 25 20 21 86 26 M ar 2 02 5 A B S T R A C T 2 0 2 5 2 0 2 1 8 6 2 6 M a r 2 0 2 5 1 2 3 5 7 8 10 11 9 12 6 4 6 1 3 2 4 5 VALLER 8 7 9 10 11 12 20 25 20 21 86 26 M ar 2 02 5 1 2 1 1 1 1 1- 1 1 1 1 1 " I 1 1 1 1 1 1 1 " I , I N , 1 0 6 L 8

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