Moisture-preserving and antibacterial preservative film and preparation method thereof
An antibacterial and moisturizing technology, applied in the field of moisturizing, antibacterial fresh-keeping film and its preparation, can solve the problems of decay and deterioration, dehydration and wilting, and achieve the effect of prolonging the fresh-keeping storage period.
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example 1
[0015] 1. Specifically, weigh and prepare according to the following formula:
[0016] Polyethylene 80kg
[0017] Chitosan 20kg
[0018] Copper sulfate 0.5 kg
[0019] Silane coupling agent 0.1 kg
[0020] 2. First, mix copper sulfate with silane coupling agent, dry at 120°C for surface treatment, and then mix with polyethylene and chitosan to prepare a moisturizing and antibacterial fresh-keeping film by a one-time blown film method.
example 2
[0022] 1. Specifically, weigh and prepare according to the following formula:
[0023] Polyvinylidene Chloride 85kg
[0024] Chitosan 15kg
[0025] Copper oxide 0.5 kg
[0026] Silane coupling agent 0.1 kg
[0027] 2. Firstly, copper oxide is mixed with silane coupling agent, dried at 120°C for surface modification treatment, and then mixed with polyvinylidene chloride and chitosan and prepared by a one-time blown film method to obtain moisture-retaining, Antibacterial plastic wrap.
example 3
[0029] 1. Specifically, weigh and prepare according to the following formula:
[0030] Polyvinylidene 90 kg
[0031] Chitosan 10kg
[0032] 1:1 mixture of copper oxide and zinc oxide by weight 2 kg
[0033] Silane coupling agent 0.15 kg
[0034] 2. First, mix copper oxide and zinc oxide with silane coupling agent, dry at 120°C for surface modification treatment, and then mix with polyethylene and chitosan to prepare by one-time blown film method to obtain moisture-retaining, Antibacterial plastic wrap.
[0035] Moisture retention, antibacterial experimental data of the preservative film prepared by example 1-3
[0036] experiment number
[0037] 3
[0038] The comparison sample is a commercially available plastic wrap, the storage variety is grape, the storage time is 100 days, and the bacterial species used in the antibacterial experiment is Staphylococcus aureus.
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