Polyester fiber has the advantages of high modulus, high strength, high elasticity, good shape retention and heat resistance, and has become the most widely used and consumed fiber variety. However, due to the phenomenon of melting, decomposition, combustion, and melting drop caused by heat, polyester fiber is prone to secondary harm, greatly limiting its use. Therefore, research and application development of polyester fiber in various countries around the world are becoming increasingly active, Various types of polyester fibers are constantly emerging. At present, the commonly used methods for anti droplet modification are mainly through the addition of anti droplet agents (such as polytetrafluoroethylene powder and melamine cyanurate), layered silicates to improve the structure of the combustion carbon layer, or through the post-treatment of fiber fabrics to achieve the modification purpose

Preparation of anti droplet polyester fiber

Spinning of PE T/BG blend on a melt index instrument at a spinning temperature of 260 ℃, with a self-designed die.

. In order to improve the dispersibility of BG in polyester (PET), the polyester chips were first crushed using a high-speed grinder before blending, and then blended using a mechanical stirrer. Add an appropriate amount of formaldehyde and water to the PE T/BG blend fibers prepared above into the reaction vessel, adjust the pH value of the reaction solution to 7-9 with triethanolamine, heat the water bath to 80 ℃, and react for 60-90 minutes. After this stage is completed, adjust the pH value to 4-5 with 36% acetic acid, continue the reaction for 90-120 minutes, and then remove the fibers and cure at 130 ℃

Performance test indicators

Anti droplet performance: 50 PET/BG blend fibers and 50 anti droplet polyester fibers were collected into bundles, ignited with the same ignition source, and the number of droplets per unit time (1 minute) of different fiber bundles was observed FTIR test: Determined using a Nicolet5700 (US) infrared Fourier transform infrared spectrometer, KBr compression, spectral range 400-4000 cm-1, with a scanning frequency of 32 for both the background and sample

Thermal performance: Perkin Elmer Pyris Diamo nd (DSC) differential scanning calorimeter was used, with a fiber sample size of about 5 mg, and placed in a standard aluminum crucible Experimental conditions: Temperature range increased from 20 ℃ to 300 ℃, N2 atmosphere, heating rate of 20 ℃/min

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