Full biodegradable fiber-reinforced starch foaming tableware and preparation method thereof
A biodegradable, fiber-reinforced technology, applied in tableware, household appliances, applications, etc., can solve the problems that the high foaming ratio of starch cannot be realized, polyvinyl alcohol is not biodegradable, and there is no waterproof and oil-proof treatment for tableware, etc., to achieve shortening molding Cycle time, small foam pore size, good water and oil repellency
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Embodiment 1
[0046] 50% tapioca starch (50 mesh), 20% polylactic acid short fiber (50D, 25mm), 10% polybutylene succinate powder (100 mesh), 5% 5000 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the mixer successively, stirred at normal temperature for 10 min, then added 3% diethanolamine, stirred at normal temperature for 15 min, finally added 10% foaming agent (water / stearic acid / baking soda=8 / 1 / 1 mass ratio), 2% 100-mesh glyceryl monostearate was stirred and mixed evenly at 40°C, then added to the mold, hot-pressed at 180°C for 40 seconds, and finally sprayed with a polybutylene terephthalate adipate film with a thickness of 10 μm. A completely biodegradable fiber-reinforced starch foam tableware is obtained.
Embodiment 2
[0048] 60% tapioca starch (100 mesh), 15% polylactic acid short fiber (100D, 10mm), 10% polybutylene terephthalate adipate powder (500 mesh), 3% 5500 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the agitator successively, stirred at normal temperature for 10 min, then added 3% triethanolamine, stirred at normal temperature for 15 min, finally added 8% foaming agent (water / palmitic acid / baking soda=6 / 2 / 2 mass ratio), 1 % 50 mesh glycerol monostearate was mixed evenly at 60°C, then added to the mold, hot-pressed at 250°C for 20 seconds, and finally sprayed with a polypropylene carbonate film with a thickness of 20 μm to obtain a completely biodegradable fiber-reinforced starch foam. soak tableware
Embodiment 3
[0050] 82% tapioca starch (150 mesh), 5% polyglycolic acid short fiber (10D, 50mm), 5% polybutylene terephthalate adipate powder (300 mesh), 1% 4500 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the mixer successively, stirred at normal temperature for 10 min, then added 1% monoethanolamine, stirred at normal temperature for 15 min, finally added 5% foaming agent (water / oleic acid / baking soda=7 / 2 / 1 mass ratio), 1 % 150 mesh glyceryl monostearate was stirred and mixed evenly at 50°C, then added to the mold, hot-pressed at 220°C for 60 seconds, and finally sprayed with a polybutylene succinate film with a thickness of 5 μm to obtain a completely biodegradable Fiber reinforced starch foam tableware.
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