Preparation method of halogen-free flame-retardant polylactic acid fiber
A technology of polylactic acid fiber and polylactic acid, applied in the manufacture of fire-resistant and flame-retardant filaments, single-component polyester artificial filaments, etc., can solve the complex processing process, high amount of inorganic particles added, solvents that do not meet the theme of green environmental protection, etc. problems, achieve good spinning shape, reduce dosage, and promote pyrolysis into charcoal
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Embodiment 1
[0028] Dry 8Kg of polylactic acid slices and 2Kg of melamine cyanuric acid (particle size 0.2-1.0 micron) at 90°C for 6 hours, mix the two evenly, put them into a twin-screw extruder, and melt them together at a temperature of 200°C. Mix, cool and granulate to obtain flame retardant masterbatch. In addition, 9Kg of polylactic acid slices and 1Kg of aminosilane modified montmorillonite (0.2-1.0 microns in particle size) were dried at 90°C for 6 hours, mixed evenly and put into a twin-screw extruder at 200 Melt blending at a temperature of ℃, cooling and granulation is the synergistic polylactic acid masterbatch. Then take 10Kg of polylactic acid chips, 10Kg of flame-retardant polylactic acid masterbatches, and 5Kg of synergistic flame-retardant polylactic acid masterbatches and dry them at 90°C for 6 hours, and add 25g of pentaerythritol stearate as a dispersant, and carry out the process in a melt spinning machine. Spinning, spinning parameters are: spinning temperature is 18...
Embodiment 2
[0030] Dry 7Kg of polylactic acid slices and 3Kg of melamine polyphosphate (particle size 0.2-1.0 micron) at 100°C for 12 hours, mix the two evenly, put them into a twin-screw extruder, and melt them at 200°C Blending, cooling and granulation to obtain flame retardant masterbatch. In addition, 19Kg of polylactic acid slices and 1Kg of quaternary phosphate intercalated montmorillonite (0.2-1.0 microns in particle size) were dried at 100°C for 12 hours, mixed evenly and put into a twin-screw extruder. Melt blending at a temperature of 200°C, cooling and granulation is the synergistic polylactic acid masterbatch. Then take 30Kg polylactic acid chips, 10Kg flame-retardant polylactic acid masterbatch, and 10Kg synergistic flame-retardant polylactic acid masterbatch and dry them at 100°C for 6 hours, and add 25g of ethylene bisstearic acid amide as a dispersant, and spin them on a melt spinning machine The spinning parameters are as follows: the spinning temperature is 180-220°C, t...
Embodiment 3
[0032] Dry 9Kg of polylactic acid slices and 1Kg of triphenyl phosphate (particle size: 0.2-1.0 micron) at 110°C for 12 hours, mix them evenly, put them into a twin-screw extruder, and melt them at a temperature of 200°C Blending, cooling and granulation to obtain flame retardant masterbatch. In addition, 19Kg of polylactic acid slices and 1Kg of aminosilane-modified montmorillonite (with a particle size of 0.2 to 1.0 microns) were dried at 110°C for 12 hours, and the two were mixed evenly and then put into a twin-screw extruder. Melt blending at a temperature of ℃, cooling and granulation is the synergistic polylactic acid masterbatch. Then take 13Kg of polylactic acid slices, 5Kg of flame-retardant polylactic acid masterbatches, and 7Kg of synergistic flame-retardant polylactic acid masterbatches and dry them at 110°C for 12 hours, and add 40g of pentaerythritol stearate as a dispersant, and carry out the process in a melt spinning machine. Spinning, spinning parameters are...
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