Transparent, tear-resistant and biodegradable polylactic acid thin film and preparation method thereof
A biodegradable, polylactic acid technology, applied in the field of transparent tear-resistant polylactic acid biodegradable film and its preparation, can solve the problems of non-tear-resistant flexibility, serious brittleness of polylactic acid film, etc., so as to solve the defects of serious brittleness, Significant economic and social significance, effect of simple equipment
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Embodiment 1
[0027] Embodiment 1: the present invention provides a kind of transparent anti-tear polylactic acid biodegradable film, the composition of its formula and the ratio of mass parts are:
[0028]
[0029]Weigh polylactic acid, polybutyl carbonate, ethylene bis stearic acid amide, erucic acid amide according to the above formula, carry out mechanical blending of each component for 5 minutes, put the mixed raw materials into the twin-screw extruder, extrude During the extruder side line, use a peristaltic pump to quantitatively add the above-mentioned 1,2-trimethylene adipate. The conditions for extrusion and granulation are: the set temperature of the twin-screw extruder is: Zone 1: 130-150°C , Zone 2: 160-180℃, Zone 3: 160-190℃, Zone 4: 160-190℃, Zone 5: 160-190℃, Zone 6: 160-190℃, Zone 7: 160-190℃, Zone 8 Zone: 160-190°C, machine head: 160-190°C, screw speed: 100-300rpm, extrude, granulate and dry to obtain polylactic acid blown film resin. The resin is blown into a film by ...
Embodiment 2
[0030] Embodiment 2: the present invention provides a kind of transparent anti-tear polylactic acid biodegradable film, the composition of its formula and the ratio of mass parts are:
[0031]
[0032] This step of extrusion granulation and film blowing process is the same as that of Example 1, the thickness of the film is controlled at 0.04mm, and the mechanical properties and light transmittance of the film are tested. The test results are listed in Table 1.
Embodiment 3
[0033] Embodiment 3: the present invention provides a kind of transparent anti-tear polylactic acid biodegradable film, the composition of its formula and the ratio of mass parts are:
[0034]
[0035] This step of extrusion granulation and film blowing process is the same as that of Example 1, the thickness of the film is controlled at 0.04mm, and the mechanical properties and light transmittance of the film are tested. The test results are listed in Table 1.
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