Nanometer packaging wrapper for fruits fresh-keeping and use thereof
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A packaging material and nanotechnology, applied in the field of storage and processing of agricultural products, can solve the problems of poor heat resistance, high cost, and inability to solve product preservation, etc., and achieve the effect of improving the quality of preservation and high preservation effect.
Inactive Publication Date: 2008-12-17
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology
Natural antistaling agents have high antibacterial efficiency, are safe and non-toxic, but have poor heat resistance, are restricted by processing conditions, and are expensive, so they are not widely used at present.
Although tra
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment example 1
[0025] Implementation Case 1: Application of nano-packaging materials in Dongzao
[0026] (1) Preparation of nano-packaging materials
[0027] 1. Raw materials
[0028] Nano-powder: nano-silver antibacterial material (Nanjing Hitech Nano Material Co., Ltd., HTB-032) 35%, nano-titanium dioxide (Nanjing Hitech Nano Material Co., Ltd., HTTI-03) 40%, kaolin (Nanjing Hitech Nano Material Co., Ltd., HTTI-03) Ltd., HTDK) 25%.
[0029] Coupling agent 570
[0030] 2. Processing of masterbatch
[0031] Nano powder 30%, polyethylene plastic 56%, coupling agent 57010%, wax 4%, after high-speed mixing, knead in a plasticizer (twin-screw plasticizer, SHJ-50 / 500-45-36) Then extrude and cool for 2 minutes and cut into pellets to obtain the finished product.
[0032] 3. Film preparation
[0033] Polyethylene plastic particles (38.5kg) and masterbatch (1.5kg) are fully mixed (0.5 hours) and blown into a film, which is the nano-packaging material.
[0034] (2) Experimental materials
[0...
Embodiment example 2
[0038] Implementation Case 2: Nano Packaging Materials Applied to Strawberries
[0039] (1) Preparation of nano-packaging materials
[0040] 1. Raw materials
[0041]Nano-powder: nano-silver antibacterial material (Nanjing Hitech Nano Material Co., Ltd., HTB-032) 35%, nano-titanium dioxide (Nanjing Hitech Nano Material Co., Ltd., HTTI-03) 40%, kaolin (Nanjing Hitech Nano Material Co., Ltd., HTTI-03) Ltd., HTDK) 25%.
[0042] 2. Processing of masterbatch
[0043] Nano-powder 30% (containing nano-silver 35%, nano-titanium dioxide 40%, kaolin 25%), polyethylene plastic 56%, coupling agent 90010%, wax 14%, after high-speed mixing for 1.5 hours in the plasticizer ( Kneading in a twin-screw extruder) followed by extruding, cooling, and pelletizing (20-80nm) to obtain finished products.
[0044] 3. Film preparation
[0045] Polyethylene plastic particles (38.5kg) and masterbatch (1.5kg) are fully mixed (0.5 hours) and blown into a film, which is the nano-packaging material.
[...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention relates to a nano-packaging material for keeping fruit fresh and the application thereof, pertaining to the technical field of storage and processing of agricultural products. 25 percent to 35 percent of nano-powder (35 percent of nano-silver, 40 percent of nano-titanium dioxide and 25 percent of kaolinite), 50 percent to 60 percent of plastic, 10 percent to 15 percent of coupling agent and 4 percent to 10 percent of wax are taken, evenly mixed in a high speed for 0.5 h to 1.5 h, then kneaded in a plastic inhaling machine and finally extruded and cooled for 1min to 2min to be granulated to obtain the master batches. 30kg to 40kg of plastic particle and 1kg to 2kg of master batches are then fully mixed for 0.5h to 1h to be blown into films so as to obtain the nano-packaging material. When being used for packaging fruit, the nano-packaging material can inhibit the activity of oxidases of fruit and vegetables and postpone the accelerating maturity and senescence to maintain the freshness of the fruit. In addition, the gas exchange of the film is improved and the water-holding property of the package is enhanced to effectively prevent the water loss of the fruit and show an excellent bacteriostatic action. Therefore, the nano-packaging material of the invention has high feasibility and broad market prospect.
Description
1. Technical field [0001] The invention relates to the preparation and application of a nano-packaging material for fruit preservation, and belongs to the technical field of storage and processing of agricultural products. 2. Background technology [0002] Fruits are rich in minerals, vitamins, essential amino acids, a variety of organic acids and dietary fiber, which have important nutritional value for the growth of the human body and the maintenance of body health. However, the perishability of the fruit itself and the strong seasonal and regional characteristics of fruit production are in contradiction with the diversity of consumers' demand for fruits and vegetables and the urgency of market adjustment in off-peak seasons, which will restrict Development of the regional fruit industry. [0003] At present, the storage and preservation of agricultural products in my country is a weak link in the field of agricultural postpartum technology. my country's cold chain syste...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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