Degradable halogen-free flame-retardant foaming material and preparation method thereof
A foaming material and foaming agent technology, applied in the field of degradable halogen-free flame retardant foaming materials and their preparation, can solve problems such as endangering life safety, and achieve the effect of expanding the processing window and making the processing window larger
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Embodiment 1
[0021] 70 parts of PVA, 10 parts of poly-β-hydroxybutyric acid, 5 parts of glycerol, 20 parts of aluminum hydroxide, 5 parts of boehmite, 5 parts of foaming agent, 3 parts of crosslinking agent, 0.5 parts of heat stabilizer Add it into a high-speed mixer, mix it at a low speed for 3 minutes, and then put the uniformly mixed material into a twin-screw plate extruder, knead, extrude, and cool to obtain the final product. Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 170°C, 180°C, 190°C, 190°C, 200°C respectively. The product performance is shown in Table 1
Embodiment 2
[0023] 60 parts of PVA, 8 parts of poly-β-hydroxybutyric acid, 4 parts of glycerin, 25 parts of aluminum hydroxide, 4 parts of boehmite, 4 parts of foaming agent, 2 parts of crosslinking agent, 0.5 parts of heat stabilizer Add it into a high-speed mixer, mix it at a low speed for 3 minutes, and then put the uniformly mixed material into a twin-screw plate extruder, knead, extrude, and cool to obtain the final product. Wherein, the extrusion temperatures of each extrusion section in the twin-screw extruder are 165°C, 175°C, 185°C, 185°C, and 195°C, respectively. The product performance is shown in Table 1
Embodiment 3
[0025] Add 45 parts of PVA, 5 parts of poly-β-hydroxybutyric acid, 3 parts of glycerol, 30 parts of aluminum hydroxide, 3 parts of boehmite, 3 parts of foaming agent, 1 part of crosslinking agent, and 0.5 parts of heat stabilizer Put it into a high-speed mixer, mix at a low speed for 3 minutes, and then put the uniformly mixed material into a twin-screw extruder for mixing, extrusion, and cooling to obtain the final product. Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 160°C, 170°C, 180°C, 180°C, 190°C respectively. The product performance is shown in Table 1
[0026] Table 1
[0027]
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