CN100351150C - Air regulating storage antistaling bag for fruit and vegetable - Google Patents
Air regulating storage antistaling bag for fruit and vegetable Download PDFInfo
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- CN100351150C CN100351150C CNB2005100434162A CN200510043416A CN100351150C CN 100351150 C CN100351150 C CN 100351150C CN B2005100434162 A CNB2005100434162 A CN B2005100434162A CN 200510043416 A CN200510043416 A CN 200510043416A CN 100351150 C CN100351150 C CN 100351150C
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Abstract
The present invention discloses an air regulating storage freshness keeping bag for fruits and vegetables. The air regulating storage freshness keeping bag is characterized in that the bag is made by the following method comprising: 10 to 30 weight portions of inorganic nano powder and 70 to 90 weight portions of blowing and molding resin raw material are mixed by a high speed dispersion machine and are made into mother particles by using a double-threaded rod mixing and melting machine; the 5 to 15 weight portions of the mother particles are mixed with one, two or more than two of 100 weight portions of the blowing and molding resin raw material to be extruded, molded by blowing, cooled, clamped, drawn and coiled to be made into a nano resin finished product film. Then, the nano resin finished product film is made into a freshness keeping bag. The air regulating storage freshness keeping bag for fruits and vegetables has high disinfection and high ventilation performance.
Description
Technical field:
The present invention relates to the postharvest technology of fruits and vegetables field, is a kind of preparation side of air regulating storage antistaling bag for fruit and vegetable specifically.
Background technology:
Fruits and vegetables is human indispensable seasonal food, be that with the fundamental difference of other food they are still organism alive, thereby fruits and vegetables is fresh-keeping very important.The kind of postharvest technology of fruits and vegetables is a lot, fresh-keeping, the novel antistaling agent of reduced pressure treatment is fresh-keeping, radiation and Electromagnetic Treatment is fresh-keeping, ozone and anion gas is fresh-keeping, biotechnology is fresh-keeping etc. all is the focus of current research, also needs the regular hour but apply on producing.At present, the method generally used of storage fruit and vegetable is two kinds of refrigeration and air conditioned storages.Refrigeration is the basis of modern fruit vegetables storing, is the method that China generally uses, and accounts for more than 95% of China's fruits and vegetables reserves, and this method is original simple, and shelf life is short, fresh-keeping effect is relatively poor; Air conditioned storage is contemporary state-of-the-art postharvest technology of fruits and vegetables, it be by means of machinery artificially the control gaseous index to required value, but because the investment of air conditioned storage storehouse is big, the storage very flexible, the over-the-road expense height is in development phase in China; To refrigerate in addition that to organically combine with air conditioned storage be limited gas storage, the method of limited gas storage is a lot, silicon window limited gas storage is arranged, plastic sheeting inner wrapping limited gas storage, film account limited gas storage, regularly open bag ventilation storage etc., in limited gas storage, the air-adjustable fresh-keeping bag that adopts generally adopts blow moldable resin raw material to make, and has following several problem: the one, be subjected to the restriction of resin raw material permeability to air, the fruits and vegetables big to respiratory intensity, desire to make and reach the suitable gas composition in the bag, air-adjustable fresh-keeping bag must be done very thinly, and with the increase storage capacity, but its intensity is low, cracky, do thicklyer, with increase intensity, but storage capacity must lack; The 2nd, these resin raw materials do not have antisepsis and sterilization, and the situation of fruit rot easily takes place in the storage; The 3rd, can assemble pernicious gas such as ethene, the acetaldehyde etc. that fruit is produced in the air-adjustable fresh-keeping bag in metabolic process, this can quicken the fruits and vegetables aging, and is unfavorable to preservation and freshness.
Summary of the invention:
The present invention seeks to overcome the deficiency of above-mentioned prior art, and a kind of preparation side of air regulating storage antistaling bag for fruit and vegetable is provided, it is poor, ventilative than improper and do not have problems such as antisepsis and sterilization, the perishable aging of fruits and vegetables mainly to solve existing Fruit and vegetable preserving bag permeability to air.
In order to achieve the above object, the present invention is achieved in that the preparation side of air regulating storage antistaling bag for fruit and vegetable, its special character is that it comprises following processing step, adopt high speed dispersor to mix with the blow moldable resin raw material of 70-90 part weight portion the inorganic nanometer powder of 10-30 part weight portion, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5-15 part weight portion and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
Realize that a kind of embodiment preferably of the present invention is, adopt high speed dispersor to mix with the blow moldable resin raw material of 75-85 part weight portion the inorganic nanometer powder of 15-25 part weight portion, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5-10 part weight portion and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
Realize that a kind of preferred plan of the present invention is, adopt high speed dispersor to mix with the blow moldable resin raw material of 80 parts of weight portions the inorganic nanometer powder of 20 parts of weight portions, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5 parts of weight portions and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
Air regulating storage antistaling bag for fruit and vegetable of the present invention, its described inorganic nanometer powder is titanium dioxide, zinc oxide, silver oxide, calcium carbonate; Its described blow moldable resin raw material is polyethylene, polypropylene, polyvinylchloride, ethylene-vinyl acetate copolymer, polystyrene.
Air regulating storage antistaling bag for fruit and vegetable of the present invention is applicable to the fresh-keeping of fresh fruit of vegetables.Because the fresh fruit of vegetables after adopting is the organism of living, wherein most important physiological activity is to breathe, and breathing is photosynthetic adverse reaction, the result who breathes, consume the oxygen of environment, give off carbon dioxide simultaneously and aqueous vapor, the strong and weak available respiratory intensity Rco of the breathing of fruits and vegetables
2Expression, the CO of unit
2Mg/Kg.h, if the weight of fruits and vegetables is W, unit is Kg, then fruits and vegetables discharge CO
2With suction O
2Amount be respectively W.Rco
2And W.Ro
2After fruits and vegetables were placed air regulating storage antistaling bag for fruit and vegetable, before sealing, gas composition and atmosphere were basic identical in the bag, after sealing, because the respiration of fruits and vegetables consumes O in the bag
2And discharge CO
2And other volatile matters, make a bag interior O
2Dividing potential drop is less than the outer O of bag
2Dividing potential drop also makes a bag interior CO
2Dividing potential drop is greater than the outer CO of bag
2Dividing potential drop, its result makes the inside and outside partial pressure difference that produces of bag, thereby cause the gas exchange one film permeation in the bag, principle according to chemical equilibrium, when reserve temperature and Atmospheric composition one timing, at t constantly, will set up a kind of metastable state in the bag, the fruits and vegetables respiratory rate equals film permeation rate, the inside and outside O of bag this moment
2Dividing potential drop and CO
2Dividing potential drop reaches dynamical equilibrium, and promptly the amount that the amount=film of gas infilters or oozes out is breathed or emitted to fruits and vegetables, that is:
W.Rco
2＝Pg.A(P’co
2-Pco
2)/D
W.Ro
2＝Pg.A(Po
2-P’o
2)/D
W is the amount of the fruits and vegetables of storage; Rco
2And Ro
2Respiratory intensity for fruits and vegetables; Pg is the finished film air transmission coefficient; A is the packing area; P ' co
2And P ' o
2The dividing potential drop of gas in the bag; Pco
2And Po
2Be the outer partial pressure of bag; D is a finished film thickness.
Utilize above-mentioned formula, under certain holding conditions (temperature, humidity, environmental gas dividing potential drop one are regularly), fruit and vegetable varieties is certain when preserving, the film kind of selecting for use is certain, the weight of fruits and vegetables and the area of freshness protection package one are regularly, according to the concrete parameter of storage, can calculate the thickness and the interior CO of bag of air regulating storage antistaling bag for fruit and vegetable
2And O
2Dividing potential drop.
The performance testing of the nano-resin finished film that the present invention makes, (adopting the finished film of embodiment 1).
1, bacteriostasis property:
The bacteriostasis property performance testing is with reference to the test method of FI/T01021-1992 (antibacterial fabric property testing method) and GB15979-1995 (the antibacterial and bactericidal property test method of product), main test nanometer ethene-acetate ethylene copolymer finished film is to bacillus subtilis, staphylococcus aureus and colibacillary bactericidal effect, result such as table 1.
Table 1
| Microbial strains | Sterilizing rate under the room temperature natural daylight (%) | 0 ℃ of sterilizing rate (%) under unglazed |
| Bacillus subtilis | 99.85 | 95.35 |
| Staphylococcus aureus | 99.76 | 94.30 |
| Escherichia coli | 98.68 | 93.87 |
Conclusion: the withered grass gemma belongs to cell stage, stronger viability is arranged, staphylococcus aureus is drafted a document gram-positive bacteria, the Colibacter gramnegative bacterium, and nanometer ethene-acetate ethylene copolymer finished film all has killing effect preferably to these three kinds of bacteriums.
2, selectivity permeability to air:
In ethene-acetate ethylene copolymer, add nano-TiO
2One of main purpose be the physical and chemical performance that improves ethene-acetate ethylene copolymer film, particularly selectivity permeability to air, be beneficial to the storage of fruits and vegetables.Nanometer ethene-acetate ethylene copolymer the finished film of same thickness and the physical and chemical performance of ethene-acetate ethylene copolymer film compare, as table 2.
Table 2
| Project | Unit | 1 | 2 |
| Pulling strengrth is indulged/horizontal stroke | Mpa | 35.20/31.6 | 33.0/29.2 |
| Breaking elongation is indulged/horizontal stroke | ％ | 459/385 | 432/368 |
| OTR oxygen transmission rate m 2 | cm 3/m 2.0.1Mpa.24h | 4.34×10 4 | 3.23×10 4 |
| Carbon dioxide transmitance m 2 | cm 3/m 2.0.1Mpa.24h | 2.34×10 6 | 1.89×10 6 |
| Moisture-vapor transmission | g/m 2.24h | 20.65 | 15.32 |
Annotate: 1, nanometer ethene-acetate ethylene copolymer finished film
2, ethene-acetate ethylene copolymer film
As shown in Table 2, compared with the control, the pulling strengrth and the breaking elongation of nanometer ethene-acetate ethylene copolymer finished film have raising slightly, substantially the toughness that has kept former film, but OTR oxygen transmission rate contrast has improved 34.5%, carbon dioxide transmitance contrast has improved 18.5%, and by contrast 1: 58.5 of oxygen and carbon-dioxide ventilative ratio changes and becomes 1: 51.6.The raising of gas permeation rate, can improve the design of air regulating storage antistaling bag for fruit and vegetable, adapting to the storage of the bigger fruits and vegetables of respiratory intensity, and the diminishing of ventilative ratio, then help the adjusting of air regulating storage antistaling bag for fruit and vegetable internal gas, the oxygen carbon dioxide is formed more be tending towards reasonable.
Compared with the prior art air regulating storage antistaling bag for fruit and vegetable of the present invention has outstanding substantive distinguishing features and marked improvement, and 1, because inorganic nanometer powder has sterilization, absorbs ultraviolet ray and catalytic oxidation function, thereby can reduce the rotting rate of fruits and vegetables effectively; 2, owing to add inorganic nanometer powder, make freshness protection package have the selectivity permeability to air, help the adjusting of air regulating storage antistaling bag for fruit and vegetable internal gas, a bag interior gas composition more is tending towards rationally, can satisfy the fresh-keeping requirement of fruit and vegetable air-conditioning storage.
The specific embodiment:
In order to understand better and to implement, describe air regulating storage antistaling bag for fruit and vegetable of the present invention in detail below in conjunction with embodiment.
Embodiment 1, adopts TiCl
4Hydrolyze method makes nano-titanium dioxide powder, with above-mentioned 20Kg nano-TiO
2Powder adopts high speed dispersor to mix with 80Kg ethene-acetate ethylene copolymer, makes master batch with the twin-screw mixer machine again; With the cherry is example, concrete parameter request according to storage, calculate the specification of air regulating storage antistaling bag, again the above-mentioned master batch of making of 5Kg is mixed with the 100Kg polyethylene, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-polyethylene finished film, makes freshness protection package according to the specific requirement of storage again.General storage 5Kg cherry, the specification of freshness protection package is: 50cm * 46cm * 0.05mm, adopt refrigeration and freshness protection package combination technology, after the balance, gas composition is CO in the bag
2Be 6-8%, O
2Be 4-7%, the storage period of cherry is more than 60 days, and good fruit rate is more than 97%, has kept the original local flavor and the outward appearance of cherry substantially.
Embodiment 2, adopt direct precipitation method to make nanometer Zinc oxide powder, adopt high speed dispersor to mix with the 90Kg polypropylene above-mentioned nanometer Zinc oxide powder 10Kg, make master batch with the twin-screw mixer machine again; With the red fuji apple is example, concrete parameter request according to storage, calculate the specification of air regulating storage antistaling bag, again the above-mentioned master batch of making of 5Kg is mixed with 100Kg Vinyl chloride resin, 45Kg dioctyl phthalate, 5Kg epoxidized soybean oil, 1Kg zinc stearate, 0.5Kg stearic acid, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano polyvinyl chloride finished film, makes freshness protection package according to the specific requirement of storage again.General storage 15Kg red fuji apple, the specification of freshness protection package is: 85cm * 90cm * 0.07mm, adopt refrigeration and freshness protection package combination technology, after the balance, gas composition is CO in the bag
2Be 3-6%, O
2Be 4-7%, the storage period of red fuji apple is 210-270 days, and percentage of water loss is less than 0.4%, and rotting rate is less than 0.5%, and commodity rate does not have physiological disease generations such as Scald substantially greater than 99%.
Embodiment 3, adopt TiCl
4Hydrolyze method makes nano-titanium dioxide powder, with above-mentioned 30Kg nano-TiO
2Powder adopts high speed dispersor to mix with 70Kg ethene-acetate ethylene copolymer, makes master batch with the twin-screw mixer machine again; With the Laiyang pear is example, concrete parameter request according to storage, calculate the specification of air regulating storage antistaling bag, again the above-mentioned master batch of making of 5Kg is mixed with 70Kg linear low density polyethylene (LLDPE), 30Kg polystyrene, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-polyethylene finished film, makes freshness protection package according to the specific requirement of storage again.General storage 10Kg Laiyang pear, the specification of freshness protection package is: 60cm * 50cm * 0.058mm, adopt refrigeration and freshness protection package combination technology, after the balance, gas composition is CO in the bag
2Be 4.5-6.5%, O
2Be 5.2-8.3%, the storage period of Laiyang pear is 180 days, does not have brown stain substantially in the fruit, and percentage of water loss is less than 0.3%, and rotting rate is less than 0.6%, and commodity rate is greater than 98%.
Claims (6)
1, the preparation method of air regulating storage antistaling bag for fruit and vegetable, it is characterized in that it comprises following processing step, adopt high speed dispersor to mix with the blow moldable resin raw material of 70-90 part weight portion the inorganic nanometer powder of 10-30 part weight portion, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5-15 part weight portion and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
2, press the preparation method of the described air regulating storage antistaling bag for fruit and vegetable of claim 1, it is characterized in that it comprises following processing step, adopt high speed dispersor to mix with the blow moldable resin raw material of 75-85 part weight portion the inorganic nanometer powder of 15-25 part weight portion, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5-10 part weight portion and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
3, press the preparation method of the described air regulating storage antistaling bag for fruit and vegetable of claim 2, it is characterized in that it comprises following processing step, adopt high speed dispersor to mix with the blow moldable resin raw material of 80 parts of weight portions the inorganic nanometer powder of 20 parts of weight portions, make master batch with the twin-screw mixer machine again; With one or both or two or more mixing the in the blow moldable resin raw material of the above-mentioned master batch of 5 parts of weight portions and 100 parts of weight portions, adopt plasticator through extrude, blowing, cooling, folder holds together, draws, rolls out technology and make the nano-resin finished film, makes freshness protection package again.
4, by the preparation method of claim 1 or 2 or 3 described air regulating storage antistaling bag for fruit and vegetable, it is characterized in that described inorganic nanometer powder is titanium dioxide, zinc oxide, silver oxide, calcium carbonate.
5, by the preparation method of claim 1 or 2 or 3 described air regulating storage antistaling bag for fruit and vegetable, it is characterized in that described blow moldable resin raw material is polyethylene, polypropylene, polyvinylchloride, ethylene-vinyl acetate copolymer, polystyrene.
6, the preparation method of air regulating storage antistaling bag for fruit and vegetable according to claim 1 is characterized in that the specification of described nano-resin finished film can design according to following formula:
W.Rco
2＝Pg.A(P’co
2-Pco
2)/D
W.Ro
2＝Pg.A(Po
2-P’o
2)/D
W is the amount of the fruits and vegetables of storage; Rco
2And Ro
2Respiratory intensity for fruits and vegetables; Pg is the finished film air transmission coefficient; A is the packing area; P ' co
2And P ' o
2The dividing potential drop of gas in the bag; Pco
2And Po
2Be the outer partial pressure of bag; D is a finished film thickness.
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|---|---|---|---|
| CNB2005100434162A CN100351150C (en) | 2005-04-29 | 2005-04-29 | Air regulating storage antistaling bag for fruit and vegetable |
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|---|---|---|---|
| CNB2005100434162A CN100351150C (en) | 2005-04-29 | 2005-04-29 | Air regulating storage antistaling bag for fruit and vegetable |
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| CN100351150C true CN100351150C (en) | 2007-11-28 |
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| CN104961987A (en) * | 2015-06-26 | 2015-10-07 | 巢湖市劲邦塑料包装有限公司 | Anti-microbial plastic bag |
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| WO2017135433A1 (en) * | 2016-02-04 | 2017-08-10 | 川上 茂樹 | Functional film, functional container, and method for retaining freshness |
| TWI698337B (en) * | 2018-12-04 | 2020-07-11 | 南亞塑膠工業股份有限公司 | A fresh-keeping of fruits and vegetables and preparation method thereof |
| TWI803699B (en) * | 2019-09-25 | 2023-06-01 | 南亞塑膠工業股份有限公司 | Membrane material for storing fruits and vegetables |
| TWI768437B (en) * | 2020-08-20 | 2022-06-21 | 南亞塑膠工業股份有限公司 | Plastic food wrap and manufacturing method thereof |
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| JPH01308780A (en) * | 1988-06-08 | 1989-12-13 | Tokan Kogyo Co Ltd | Packaging method for fruit and vegetables |
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2005
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01308780A (en) * | 1988-06-08 | 1989-12-13 | Tokan Kogyo Co Ltd | Packaging method for fruit and vegetables |
| CN2211969Y (en) * | 1995-03-16 | 1995-11-08 | 陕西省苹果气调贮藏技术研究中心 | Silicon window fresh keeping bag for fruit and vegetible |
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Non-Patent Citations (1)
| Title |
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| 气调包装条件下果蔬呼吸强度模型的研究进展 张长峰.农业工程学报，第20卷第3期 2004 * |
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| CN1686762A (en) | 2005-10-26 |
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