Environment friendly biological preservative film and preparation method thereof
A bio-preservation and environmental-friendly technology, applied in bio-packaging, food preservation, food science, etc., can solve the problems of weak marketization and high cost, and achieve good antibacterial and fresh-keeping performance
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no. 1 example
[0026] A kind of environmental protection biological preservative film, is made of the raw material of following mass parts,
[0027] Average molecular weight is 100 parts of polylactic acid of 148kDa;
[0028] Straw fiber 5 parts;
[0029] 1 part of glycerin;
[0030] 1 part of polydiphenylmethane diisocyanate;
[0031] Nisin 1 part;
[0032] 10 parts of dichloromethane;
[0033] Natamycin 1 part.
[0034] Firstly, the straw fiber, glycerin and polydiphenylmethane diisocyanate were fully mixed and homogenized at room temperature for 1 hour, and left for 24 hours to prepare a mixed fiber component; then 2 parts by mass of polylactic acid, dichloromethane, lactic acid Streptin and natamycin were mixed evenly and stirred for 50 minutes to prepare an antibacterial preservative; 98 parts by mass of polylactic acid particles were mixed with 50 parts by mass of mixed fiber components, and the diameter of the screw rod was 18mm, and the length-to-diameter ratio of the screw rod ...
no. 2 example
[0036] A kind of environmental protection biological preservative film, is made of the raw material of following mass parts,
[0037] Average molecular weight is 100 parts of polylactic acid of 148kDa;
[0038] 4 parts straw fiber;
[0039] 1.5 parts of glycerin;
[0040] 0.8 part of polydiphenylmethane diisocyanate;
[0041] Nisin 0.8 part;
[0042] 15 parts of dichloromethane;
[0043] Natamycin 1.2 parts.
[0044] Its specific manufacturing steps are the same as those of the first embodiment, and will not be repeated here.
no. 3 example
[0046] A kind of environmental protection biological preservative film, is made of the raw material of following mass parts,
[0047] Average molecular weight is 100 parts of polylactic acid of 148kDa;
[0048] 3 parts straw fiber;
[0049] 2 parts of glycerin;
[0050] 0.5 part of polydiphenylmethane diisocyanate;
[0051] Nisin 0.5 part;
[0052] 20 parts of dichloromethane;
[0053] Natamycin 1.5 parts.
[0054] Its specific manufacturing steps are the same as those of the first embodiment, and will not be repeated here.
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