Plastic composition, plastic and preparation method of the plastic
A technology of plastic composition and polymer, applied in the field of plastic composition, can solve the problems of poor mechanical properties, no fragrance, etc.
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[0032] In the preparation process of the above-mentioned plastics, the presence of moisture will have a greater impact on the properties of the prepared plastics. Therefore, preferably, when preparing the above-mentioned plastic, the components in the plastic composition are first dried at 0.04-0.08 MPa at 30-120° C. for 4-8 hours to remove the moisture in the plastic composition. The plastic composition is then placed in an extruder to melt and extrude. The melt extrusion method is well-known to those skilled in the art, for example, it can be used when the aspect ratio is 20-40, the screw speed is 180-250r / min, and the temperature of each section is 140-160. ℃, 220-230℃, 230-240℃, 230-245℃, 230-245℃, 240-245℃, 240-245℃, 240-250℃, 240-250℃, 245-255℃, each section of Melt extrusion is carried out under the condition of vacuum degree of 0.02-0.06MPa.
[0033] In the above method, the degree of vacuum is absolute pressure. The extrusion can be carried out in a twin-screw extrude...
Example Embodiment
[0036] Example 1
[0037] This embodiment is used to illustrate the plastic composition, plastic and preparation method thereof provided by the present invention.
[0038] 1. Raw material pretreatment
[0039] Polylactic acid (polylactic acid produced by Natureworks in the United States, injection molding grade, viscosity average molecular weight of 200,000, melting point of 165°C), polycarbonate, and peppermint flavor are dried at 0.08MPa and 120°C for 4 hours.
[0040] Put ethylene-ethyl acrylate-glycidyl methacrylate (the content of glycidyl methacrylate is 5wt%) into a vacuum drying oven and dry at 0.06MPa and 50°C for 4h.
[0041] 2. Raw material mixing and extrusion
[0042] Take 100 parts by weight of the above-treated polylactic acid (with a water content of 0.02% by weight), 180 parts by weight of polycarbonate, 5 parts by weight of peppermint flavor, and 13 parts by weight of ethylene-ethyl acrylate-glycidyl methacrylate in the double In the screw extruder, the length to diame...
Example Embodiment
[0045] Example 2
[0046] This embodiment is used to illustrate the plastic composition, plastic and preparation method thereof provided by the present invention.
[0047] 1. Raw material pretreatment
[0048] Polylactic acid (polylactic acid produced by Natureworks in the United States, injection molding grade, viscosity average molecular weight of 250,000, melting point 170°C), polycarbonate, and lemon flavor were dried at 0.08MPa and 110°C for 4 hours.
[0049] Put ethylene-propyl acrylate-glycidyl methacrylate (the content of glycidyl methacrylate is 8wt%) into a vacuum drying oven, and dry at 0.06MPa and 50°C for 4h.
[0050] 2. Raw material mixing and extrusion
[0051] Take 100 parts by weight of the above-treated polylactic acid (with a water content of 0.02% by weight), 200 parts by weight of polycarbonate, 6 parts by weight of lemon flavor, and 18 parts by weight of ethylene-propyl acrylate-glycidyl methacrylate, 1 weight part Parts of four [β-(3,5-di-tert-butyl-4-hydroxypheny...
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