CN101311074B - Green tea fresh-keeping nano packaging wrapper and use thereof - Google Patents
Green tea fresh-keeping nano packaging wrapper and use thereof Download PDFInfo
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- CN101311074B CN101311074B CN2008101241866A CN200810124186A CN101311074B CN 101311074 B CN101311074 B CN 101311074B CN 2008101241866 A CN2008101241866 A CN 2008101241866A CN 200810124186 A CN200810124186 A CN 200810124186A CN 101311074 B CN101311074 B CN 101311074B
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Abstract
The invention relates to a nano preservation packing material for good-quality green tea and an application thereof, which pertains to the technical field of agricultural product storing and processing. According to mass ratio, 30 percent of nano-powder, 56 percent of polyvinyl plastics, 10 percent of silane coupling agent, 2 percent of paraffine and 2 percent of antioxidant are taken, stirred for 0.5 hour at a high speed, kneaded in a plastic extruding machine and then extruded and diced into grains, thus respectively obtaining grains D, HTB, TiO2R and TiO2A. 30kg of polyvinyl plastic grains is fetched and fully mixed with 5kg of grains for 0.5 to 1 hour, blasted into a thin film, plated with an aluminium film and made into a packaging bag of 30cm*20cm, thus manufacturing the nano packing material. The nano package is used for packing the green tea, which can effectively isolate oxygen and ultraviolet radiation from the tea, prevent the tea from going mouldy and losing quality caused by oxidation; meanwhile, the transmissivity of water is remarkably lowered, thus being capable of inhibiting the decomposition of chlorophyll, improving the quality of the green tea and having wide market prospect.
Description
One, technical field
The present invention relates to a kind of excellent green tea nano-packaging Perserving materials and application thereof, belong to the Storage and Processing of Agricultural Products technical field.
Two, background technology
China's green tea is wide with resource, output is high, quality better, especially the abundant and well-known boundary of micronutrient levels, green tea has important physiological function such as the atherosclerotic of preventing, reducing blood lipid, inhibiting bacteria and diminishing inflammation, radiation proof, anticancer and anti-mutation, become in the world's three big beverages and have survivability most, the civilized and healthy beverage that gets consumer reception most, but because of there not being rational preservation technology to influence its market competitiveness greatly so far.China's green tea storage and packing technique are comparatively backward, compare with domestic other packaging for foodstuff with the tea packaging in Japan, China Taiwan, and simple and crude relatively, fresh-keeping effect is poor.Green tea is preserved and manner of packing from the market, and most inner wrappings adopt complex pockets packed, and the barrier property of packing is poor.At present the preservation technique of tealeaves mainly contains: dry technology, deepfreeze technology, deoxygenation or bleed towards the nitrogen technology etc.The deepfreeze technology is most advanced, and effect is best.Deoxygenation or to bleed towards the nitrogen technology be to adopt the deoxidizer deoxygenation and bleed towards nitrogen in green tea packing, its fresh-keeping effect is comparatively remarkable.The fresh chemically technology is added ascorbic acid and sodium sulphite with the bad change of the oxidation that delays tealeaves in tealeaves.Biological way of keeping fresh then adds the Bacillus cereus powder in tealeaves, under the limit oxygen condition, this bacterium can make the tealeaves surface form biofilm, thus the bad change of control oxidation.
The oxygen barrier of nano packaging material, moisture peretrability, deoxygenation, antibiotic can all significantly the enhancing than ordinary packing material there are some researches prove, are raw material with SG-IV type polyvinyl chloride resin, add the TiO that contains nano particle
2Master batch and other 11 kinds of functional materials are developed high-intensity resistance O
2Nanometer Fuji apple preservative film, longitudinal tensile strength improves 36%, saturating O
2Rate reduces by 18%, and rate of perviousness reduces by 10%, CO
2Durchgriff only changes 1.5%, safety and sanitation; With conventional LDPE preservative film recipe ingredient is carrier, add argentiferous based nano-material master batch, the nano mildew-proof preservative film of the d=40-70nm of nanometer particle size is developed in blowing, and its maximum antibacterial efficient contrast improves 1 times, and the maximum antibacterial efficient that contains the silver-colored based nano-material of 4% (W/W) improves 67.9%.Nano packaging material has broad application prospects in packaging for foodstuff.
Three, summary of the invention
Technical matters
The purpose of this invention is to provide the fresh-keeping nano packaging material of a kind of excellent green tea and be applied to green tea fresh-keeping, these packing are by nano-powder, vinyon, coupling agent, antioxidant, cured etc. being prepared from, be used for green tea fresh-keeping, can significantly improve the preservation quality of green tea, stop green tea qualities such as vitamin C, chlorophyll, Tea Polyphenols, free amino acid in storage to descend and the increase of moisture.
Technical scheme
A kind of green tea fresh-keeping nano packaging wrapper, make by the following method:
1) processing of master batch
Master batch raw material nano powder D: attapulgite; Nano-powder HTB:Ag
3PO
4Silver is anti-biotic material; Nano-powder TiO
2R: rutile-type; Nano-powder TiO
2A: anatase titanium dioxide;
Master batch processing is respectively got above-mentioned nano-powder 30% by mass ratio; respectively with vinyon 56%, coupling agent kh-570 10%, paraffin 2%, antioxidant 2% through the high speed mixing rising after 0.5 hour mediate in the molding machine extrude cooling after 2 minutes pelletizing obtain nanometer master batch D, HTB, TiO
2R, TiO
2A;
2) film preparation
Nanometer master batch D, HTB, TiO
2R, TiO
2A was in mass ratio 5: 2: 4: 1 ratio is mixed, and fully mixes by 1: 6 ratio of mass ratio with the vinyon particle and blows out film, and aluminizer is promptly made nano-freshness retaining packaging material then.
Above-mentioned used molding machine is that twin screw plays molding machine, and used coupling agent is a silanes reagent, and model is KH-570 (γ-methacryloxypropyl trimethoxy silane, CAS 2530-85-0).
The packaging bag of described packing being made 30cm*20cm is used for green tea fresh-keeping.
Beneficial effect
Nano packaging material of the present invention is with ground rice body, vinyon, coupling agent, antioxidant, cured etc. is prepared from the packing that is used for excellent green tea, can significantly improve the preservation quality of green tea.Its advantage and good effect are:
1, forms homodisperse nano composite plastics, make plastics also have the characteristic of the nano material of being added.Measure its rate of perviousness, oxygen permeability, longitudinal tensile strength respectively according to GB/T1037-1988, GB/T1038-2000, GB/T13022-1991, found that the nano packaging material rate of perviousness reduces by 44.3%, oxygen permeability reduces by 44.6%.
2, improve the preservation quality of green tea.Use nano packaging material of the present invention, green tea physical and chemical quality such as moisture, free amino acid, Tea Polyphenols, chlorophyll, vitamin C and organoleptic quality etc. to be significantly higher than adopt the ordinary packing material green tea as shown in Figure 1, 2, adopt the moisture of nano-packaging Pilochun (a green tea) than ordinary packing low 11.8% after 300 days in storage; Adopt the same journey downswing of free amino acid, Tea Polyphenols, chlorophyll, ascorbic content of nano-packaging Pilochun (a green tea) with ordinary packing, under normal temperature condition free amino acid, Tea Polyphenols, chlorophyll, the vitamin C reserve capacity of storage Pilochun (a green tea) of nano packaging material packing after 300 days higher by 22.8% respectively than ordinary packing, 9.4%, 30.4%, 9.5%.The present invention is used for the excellent green tea packing, and fresh-keeping effect is higher than the ordinary packing material.
Four, description of drawings
Fig. 1 nano packaging material is used for the preservation quality of Pilochun (a green tea).
Fig. 2 nano packaging material is used for the preservation quality at blue or green peak.
Five, the specific embodiment
A kind of excellent green tea nano-freshness retaining packaging material is to make by the following method,
The processing of 1 master batch:
1.1 the main nano-powder and the effect of using
(1) D---attapulgite has stronger adsorbability (sea, Nanjing Turner rice company, model: HTDK) to moisture and oxygen etc.
(2) HTB---silver is anti-biotic material, and Main Ingredients and Appearance is Ag
3PO
4, antibiotic property, (sea, Nanjing Turner rice company, model: HTB-032)
(3) TiO
2R---rutile-type, photocatalytic absorbs ultraviolet ray, and light is had bigger respective range, antiageing, enhance mechanical strength (sea, Nanjing Turner rice company, model: HTTI-03)
(4) TiO
2A---anatase titanium dioxide has stronger absorption intensity (sea, Nanjing Turner rice company, model: HTTI-01) than R type
1.2 the preparation technology of nanometer master batch
Get nano-powder (D, HTB, TiO respectively by mass ratio
21, TiO
22) 30%, vinyon 56%, coupling agent kh-570 (γ-methacryloxypropyl trimethoxy silane, CAS 2530-85-0) 10%, antioxidant 2%, paraffin 2%, through high-speed mixer mixing (3500 change/hour), twin screw plays molding machine (SHJ-50/500-45-36) and mediates, extrude cooling 2 minutes, cutting obtains nanometer master batch D, HTB, TiO respectively
2R and TiO
2A.
The preparation of 2 nano plastic freshness protection packages:
2.1 instrument
The good enterprise in two-layer co-extrusion 1m inflation film manufacturing machine Zhejiang package packing machine Co., Ltd
Corona treatment SDCD9 Zhejiang Ming Li electrical apparatus factory
The good enterprise in polyethylene aluminizer machine Zhejiang package packing machine Co., Ltd
The good enterprise in system controlled by computer high speed Bag Making Machine FDB300W Zhejiang package packing machine Co., Ltd
2.2 film-blowing process
Inflation film manufacturing machine preheating 5h transfers parameter (technological parameter sees Table 1), nanometer master batch D, HTB, TiO
2R, TiO
2A was in 5: 2: 4: 1 ratio is mixed, and reinforced (vinyon particle and nanometer master batch add by 6/1) fully mixes blown film.
The parameter control of one meter inflation film manufacturing machine of the two-layer co-extrusion of table 1
Make the nano plastic film of 645mm*65 μ m through above-mentioned technology.
2.3 aluminizer technology
The nano plastic film, and corona treatment (135v, 2.8A), aluminizer machine plating (12 μ m aluminizer), slaking between slaking (52 ℃, 48h).
Obtain the nano plastic film of aluminizing of 80 μ m through above-mentioned technology.
2.4 bag technology
Whole design, cut, seal entirely and finish continuously by system controlled by computer high speed Bag Making Machine is integrated to film.Obtain the nano plastic freshness protection package of 30cm*20cm at last.
Measure its rate of perviousness, oxygen permeability, longitudinal tensile strength respectively according to GB/T1037-1988, GB/T1038-2000, GB/T13022-1991, found that the nano packaging material rate of perviousness reduces by 44.3%, oxygen permeability reduces by 44.6%.(table 2)
The physical property of table 2 nano packaging material
Embodiment 1: nano packaging material is applied to Pilochun (a green tea)
(1) the bright leaf of preparation of tea spreads, complete, and spreading for cooling, drying, selection by winnowing is chosen and is picked, and gets finished product.
(2) packaging operation per 50 restrains nano packaging material packing and the preservation under normal temperature that Pilochun (a green tea) adopt the present invention to make.Use nano packaging material of the present invention, can significantly improve the preservation quality of Pilochun (a green tea).Its physical and chemical quality such as moisture, free amino acid, Tea Polyphenols, chlorophyll, vitamin C, organoleptic quality etc. will significantly be better than adopting the ordinary packing material, as shown in Figure 1.The moisture of Pilochun (a green tea) all rises between freshness date, adopts the moisture of nano-packaging Pilochun (a green tea) will significantly be lower than ordinary packing, adopts the moisture of nano-packaging Pilochun (a green tea) than ordinary packing low 11.8% after 300 days in storage; Adopt the same journey downswing of free amino acid, Tea Polyphenols, chlorophyll, ascorbic content of nano-packaging Pilochun (a green tea), but the nano-packaging group changes and content is significantly higher than the employing ordinary packing mild with ordinary packing; Under normal temperature condition free amino acid, Tea Polyphenols, chlorophyll, the vitamin C reserve capacity of storage Pilochun (a green tea) of nano packaging material packing after 300 days higher by 22.8% respectively than ordinary packing, 9.4%, 30.4%, 9.5%; Adopt nano-packaging Pilochun (a green tea) organoleptic analysis's result also to be better than adopting ordinary packing, the subjective appreciation total points is 85.5 after preserving 300 days, and ordinary packing is 81.1.
Embodiment 2: nano packaging material is applied to blue or green peak
(1) the bright leaf of preparation of tea spreads, complete, and spreading for cooling, drying, selection by winnowing is chosen and is picked, and gets finished product.
(2) packaging operation per 50 restrains nano packaging material packing and the preservation under normal temperature that blue or green peak adopts the present invention to make.Use nano packaging material of the present invention, can significantly improve the preservation quality at blue or green peak.Its physical and chemical quality such as moisture, free amino acid, Tea Polyphenols, chlorophyll, vitamin C, organoleptic quality etc. will significantly be better than adopting the ordinary packing material, as shown in Figure 2.The moisture at blue or green peak all rises between freshness date, adopts the moisture at the blue or green peak of nano-packaging will significantly be lower than ordinary packing, adopts the moisture at the blue or green peak of nano-packaging than ordinary packing low 7.0% after 300 days in storage; Adopt the same journey downswing of free amino acid, Tea Polyphenols, chlorophyll, ascorbic content at the blue or green peak of nano-packaging, but the nano-packaging group changes and content is significantly higher than the employing ordinary packing mild with ordinary packing; Under normal temperature condition free amino acid, Tea Polyphenols, chlorophyll, the vitamin C reserve capacity at storage blue or green peak of nano packaging material packing after 300 days higher by 19.2% respectively than ordinary packing, 9.3%, 27.3%, 21.6%; Adopt the blue or green peak organoleptic analysis's of nano-packaging result also to be better than adopting ordinary packing, the subjective appreciation total points is 85.9 after preserving 300 days, and ordinary packing is 80.2.
Claims (3)
1. green tea fresh-keeping nano packaging wrapper, make by the following method:
1) processing of master batch
Master batch raw material nano powder D: attapulgite; Nano-powder HTB:Ag
3PO
4Silver is anti-biotic material; Nano-powder TiO
2R: rutile-type; Nano-powder TiO
2A: anatase titanium dioxide;
Master batch processing is respectively got above-mentioned raw materials nano-powder 30% by mass ratio, respectively with vinyon 56%, coupling agent kh-570 10%, paraffin 2% and antioxidant 2% through the high speed mixing rising after 0.5 hour mediate in the molding machine extrude cooling after 2 minutes pelletizing obtain nanometer master batch D, HTB, TiO
2R, TiO
2A;
2) film preparation
Nanometer master batch D, HTB, TiO
2R, TiO
2A was in mass ratio 5: 2: 4: 1 ratio is mixed, and fully mixes by 1: 6 ratio of mass ratio with the vinyon particle and blows out film, and aluminizer is promptly made nano-freshness retaining packaging material then.
2. according to the described a kind of green tea fresh-keeping nano packaging wrapper of claim 1, it is characterized in that used molding machine is that twin screw plays molding machine.
3. the application of claim 1 or 2 described a kind of green tea fresh-keeping nano packaging wrappers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101241866A CN101311074B (en) | 2008-06-17 | 2008-06-17 | Green tea fresh-keeping nano packaging wrapper and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101241866A CN101311074B (en) | 2008-06-17 | 2008-06-17 | Green tea fresh-keeping nano packaging wrapper and use thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101311074A CN101311074A (en) | 2008-11-26 |
| CN101311074B true CN101311074B (en) | 2011-05-04 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733975B (en) * | 2009-11-17 | 2011-05-18 | 许庆华 | Method for making combined fruit and vegetable fresh-keeping and cold storage carton |
| WO2012002933A1 (en) * | 2010-06-29 | 2012-01-05 | Empire Technology Development Llc | Coating materials for bisphenol a-containing polymers |
| CN101948584B (en) * | 2010-09-27 | 2012-09-19 | 南京农业大学 | Nano packing material suitable for keeping edible fungi fresh and application thereof |
| CN102061026B (en) * | 2010-11-26 | 2013-04-24 | 中国科学院宁波材料技术与工程研究所 | Use of composite fast ion conductive film as heat and moisture permeable composite film |
| CN104770482A (en) * | 2015-01-30 | 2015-07-15 | 易华 | Fresh keeping method of famous and excellent green tea |
| CN104829928A (en) * | 2015-05-13 | 2015-08-12 | 南京农业大学 | Nano packaging bag for retaining freshness of fig as well as preparation method and application of nano packaging bag |
| CN106672446A (en) * | 2016-12-08 | 2017-05-17 | 河源市创新威包装科技有限公司 | Freshness-preservation packaging bag and making method thereof |
| CN107383542A (en) * | 2017-08-15 | 2017-11-24 | 安徽华猫软包装有限公司 | A kind of mildewproof plastics packaging bag and preparation method thereof |
| CN107373287A (en) * | 2017-09-14 | 2017-11-24 | 陇南市朝华茶叶有限公司 | A kind of Longjing tea long-acting preservative and preparation method thereof |
| CN107518247A (en) * | 2017-09-14 | 2017-12-29 | 陇南市朝华茶叶有限公司 | A kind of harmless preservation method of Maojian tea |
| CN107857921A (en) * | 2017-10-11 | 2018-03-30 | 中国药科大学 | A kind of preservation method of mushroom |
| CN110901111A (en) * | 2019-11-07 | 2020-03-24 | 张金勇 | Preparation method of vegetable preservative film |
| CN113172970B (en) * | 2021-04-26 | 2022-06-10 | 浙江省农业科学院 | Preparation method of packaging material, packaging material and packaging bag |
| CN113208033A (en) * | 2021-05-18 | 2021-08-06 | 干将新材料有限公司 | Antibacterial deoxidizing agent and preparation method thereof |
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