Biodegradable polylactic acid resin composition and product
A technology of polylactic acid resin and biodegradable polyester is applied in the fields of biodegradable polylactic acid resin composition and biodegradable plastic composition, and can solve the problems of high cost of plasticizer and low plasticization efficiency.
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Embodiment 1-11， comparative example 1-7
[0064] According to the proportion listed in Table 1, use a twin-screw extruder to extrude and granulate, and the extrusion temperature is 180-200°C.
[0065] After the particles were vacuum-dried at 80° C. for 8 hours, the particles were equally divided into 2 parts.
[0066] The first batch of particles was blown by a single-screw extruder to prepare a film with a thickness of 20 μm. The blow molding temperature is 180-200°C. Various performance tests were carried out on the obtained film, and the results are listed in Table 2. Comparative examples 1 and 6-7 had poor formability and could not be formed into films.
[0067] The second part of particles is injection-molded into impact test specimens by an injection molding machine, and the injection molding temperature is 180-220°C. The impact properties of the obtained splines were tested, and the results are listed in Table 2.
Embodiment 12-16
[0069] According to the proportioning in Table 3, use a twin-screw extruder to extrude and granulate, and the extrusion temperature is 180-200°C. Next, a film with a thickness of 100 μm is prepared by single-screw extrusion casting at a casting temperature of 180-220° C. Then, various performance tests were carried out on the obtained film, and the results are listed in Table 4.
Embodiment 17-21
[0071] According to the proportioning of Example 9, a twin-screw extruder is used to extrude and granulate, and the extrusion temperature is 180-200°C. Next, a raw film with a thickness of 100 μm was prepared by single-screw extrusion casting at a casting temperature of 180-220° C. Furthermore, under the conditions shown in Table 5, the original film was stretched, and then various performance tests were performed on the obtained film, and the results are listed in Table 5.
[0072] The biodegradable polylactic acid resin composition and products of the present invention have biodegradability, do not cause white pollution, are environmentally friendly, soft in nature, good in toughness, comfortable in touch, excellent in molding processability, and low in exudation rate. Compared with the comparison example, it is a more advantageous technology.
[0073]
[0074] table 3
[0075]
[0076] Table 4
[0077]
[0078] table 5
[0079] Note 1: Stretch in TD directi...
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