A calcium carbonate highly filled biodegradable plastic film material used as a shopping bag and its preparation method
A biodegradable, plastic film technology, applied in the field of packaging materials, can solve problems such as easy agglomeration and performance degradation of film products, and achieve the effect of reducing specific gravity, reducing specific gravity and strong market competitiveness.
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Embodiment 1
[0037] The preparation of a kind of calcium carbonate highly filled fully biodegradable packaging material, the steps are as follows:
[0038] 1) Select 1kg of 1500 mesh calcium carbonate and dry it at 100°C for 2 hours;
[0039] 2) Stir and mix the calcium carbonate obtained in step 1) and 0.01 kg of zinc titanate in a high-speed mixer at a temperature of 100° C., and mix for 10 minutes to obtain activated calcium carbonate;
[0040] 3) Take 0.01kg pulp fiber (fiber diameter is 50±10μm) and 0.2kg polybutylene terephthalate (PBS) and mix evenly on the open mill, the temperature of the open mill is 120±20°C, and the fiber is obtained Masterbatch;
[0041] 4) the activated calcium carbonate that step 2) obtains, the pulp fiber masterbatch that step 3) obtains, 0.8kg PBS and 0.03kg sorbitol mix homogeneously and carry out extruding granulation in twin-screw extruder, carry out blowing again The film is made into packaging material. The surface morphology of the thin film was o...
Embodiment 2
[0044] The preparation of a kind of calcium carbonate highly filled fully biodegradable packaging material, the steps are as follows:
[0045] 1) Select 1.2kg of 2000 mesh calcium carbonate and dry it at 110°C for 2 hours;
[0046] 2) Stir and mix the calcium carbonate obtained in step 1) and 0.02 kg aluminate in a high-speed mixer at a temperature of 100° C., and mix for 15 minutes to obtain activated calcium carbonate;
[0047] 3) Take 0.015Kg hemp fiber (fiber diameter is 70 ± 10 μ m) and 0.25 kg PBAT and mix evenly on the open mill, the temperature of the open mill is 115 ± 20 ° C, and obtain the hemp fiber masterbatch;
[0048] 4) the activated calcium carbonate obtained in step 2), the hemp fiber masterbatch obtained in step 3), 0.55kg PBAT and 0.025kg tributyl citrate are mixed uniformly and extruded in a twin-screw extruder for granulation, Film blowing is then carried out to obtain packaging materials.
[0049] The performance of the film was tested according to the...
Embodiment 3
[0051] The preparation of a kind of calcium carbonate highly filled fully biodegradable packaging material, the steps are as follows:
[0052] 1) Select 1.3kg of 1000 mesh calcium carbonate and dry it at 130°C for 3 hours;
[0053] 2) Stir and mix the calcium carbonate obtained in step 1) and 0.04kg aluminate in a high-speed mixer at a temperature of 110° C., and mix for 15 minutes to obtain activated calcium carbonate;
[0054] 3) get 0.02kg bamboo fiber (fiber diameter is 45 ± 10 μ m) and 0.2kg PBS on the open mill and mix evenly, the open mill temperature is 120 ± 20 ℃, makes bamboo fiber masterbatch;
[0055] 4) the activated calcium carbonate obtained in step 2), the bamboo fiber masterbatch obtained in step 3), 0.2kg PBS, 0.3kgPBAT, 0.01kg glycerol and 0.02kg acetyl tributyl citrate are mixed uniformly and then extruded in a twin-screw Extrude and granulate in the machine, and then blow the film to make the packaging material.
[0056] The performance of the film was t...
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