CN1075455C - Freshness protection package for preventing litchi from browing and its preparing process - Google Patents
Freshness protection package for preventing litchi from browing and its preparing process Download PDFInfo
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- CN1075455C CN1075455C CN99117122A CN99117122A CN1075455C CN 1075455 C CN1075455 C CN 1075455C CN 99117122 A CN99117122 A CN 99117122A CN 99117122 A CN99117122 A CN 99117122A CN 1075455 C CN1075455 C CN 1075455C
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Abstract
The present invention relates to a fresh keeping bag capable of preventing lichi from browning and a preparation method thereof. The fresh keeping bag uses a double-layer composite structure composed of a PE thin film added with components for absorbing light, preventing corrosion, keeping moisture, absorbing gas, etc. and paper, the transmission of the light with the wavelength of 200 to 700 nm can be effectively resisted, and the photochemical reaction of pericarp is reduced. The paper in the inner layer can avoid generating beads on the inner wall of the bag, the moisture balance in the bag can be maintained, the excessive dehydration is prevented, and simultaneously, the present invention has the functions of corrosion prevention, heat absorption, light absorption, gas absorption, mechanical damage prevention, etc. Thus, the effects of keeping litchi fresh and preventing litchi from browning are obvious, the litchi can be preserved for 7 to 10 days at normal temperature, and is stored for 25 to 35 days at 2 to 5 DEG C, and the color and the fragrance of the litchi are unchanged.
Description
The present invention relates to a kind of Fruit fresh-preservation bag, particularly can prevent freshness protection package of lichee color browning and preparation method thereof.
Present polyethylene (polyethylene, PE) freshness protection package, with the spontaneous controlled-atmosphere is that theoretical basis is developed, it only is a thickness of selecting the PE bag by control, the air-tightness that is the PE bag reaches certain fresh-keeping effect, and fails to solve because fruit matter that factors such as illumination, germ, enzyme, moisture cause and fruit look become bad problem.In addition, the often long-pending full water pearl of this common PE freshness protection package its inwall in preservation process makes fruit near the inwall browning that very easily decolours, even rot, so the fresh-keeping effect of existing common PE freshness protection package is very limited, especially can not effectively prevent the lichee brown stain, be not suitable for being used for lichee fresh-keeping.
The purpose of this invention is to provide a kind of freshness protection package for preventing litchi from browing and preparation method thereof, this freshness protection package is except the functions such as spontaneous controlled-atmosphere that reservation existing P E freshness protection package has, can also control the effect of factors such as illumination, germ, enzyme, moisture effectively, thereby solve existing existing the problems referred to above of PE freshness protection package, reach good refreshing effect, can effectively prevent the purpose of lichee brown stain.
The anti-brown stain of lichee is fresh-keeping to be a difficult problem in the lichee fresh-keeping field.The inventor finds that after deliberation illumination is to cause that one of principal element of lichee brown stain, especially wavelength are the light of 200～700nm.The inventor finds that after deliberation in Fructus Litchi extract, 75% cmpd contains active function groups, as α-cubebene, carypohyllene.α-D-3,6 Anhydrogalactose pyrans first glycosides, gima ethylenic-B and unsaturated fatty acid ester etc., photochemical reaction easily takes place in these cmpds, and causes the lichee brown stain.In addition, the contriver has confirmed that also the anthocyanin in the pericarp also easily degraded by light, and can make the absorption spectrum blue shift, and then has quickened the brown stain speed of lichee pericarp.In addition, oxygen, enzyme, germ and dehydration etc. also are the factors that causes the lichee brown stain.Therefore, pass through as long as can reduce the light of (prevention) 200～700nm wavelength effectively, and energy inhibitory enzyme and action of microorganisms, suitably regulate water balance, reduce harmful gas concentration, just can prevent the lichee brown stain effectively.
Measure of the present invention is that this freshness protection package for preventing litchi from browing is made double-decker, it is outer to absorb 200～700nm wavelength light and CO2 and play the Charge of antisepsis and polyethylene (PE) film of auxiliary material for containing, internal layer be adsorbed with colorant and preserve moisture, the paper of anticorrosion, getter MAT'L.
The consumption of related various compositions and proportioning are all calculated by massfraction among the present invention.
The Charge in the said outer field polyethylene foil and the composition of auxiliary material and proportioning are calculated by its shared percent by weight in the PE material and are generally: 1-chloro-2-methyl-3-isothiazolone 0.01～0.1, gaultherolin 0.01～0.1,2,2 '-dihydroxyl diethylamine 0.01～0.05 and UV-531 0.01～1.0, and phthalocyanine green 0.01～0.1 or phthalocyanine blue 0.01～1.0 or carbon black 0.1～1.0.
The adsorbed colorant of the paper of said internal layer comprises one or more in chlorophyll, lutein and carotene or other food coloring, preserve moisture, anticorrosion, getter MAT'L comprises shitosan and the C that supports one's family, and septichen or fragrant grass aldehyde, diisopropanolamine, diethanolamine (DEA), 2-(thiazole-4-yl) benzimidazole, 2, one or more among the 4-D etc.When used colorant is more than one, can be arbitrary proportion between them.Used preserve moisture, each proportioning components is generally in anticorrosion, the getter MAT'L: shitosan 0.05～5.0, vitamin C 0.05～5.0, septichen is or/and other composition (can be arbitrary proportion between the multiple components) 0.01～0.05.
The thickness of the outer layer polyethylene film of freshness protection package for preventing litchi from browing of the present invention is preferably 0.05～0.44mm.
The preparation method of the freshness protection package for preventing litchi from browing of the invention described above may further comprise the steps:
(1), by required proportioning polyethylene raw material and Charge and auxiliary material are made film with conventional approach; The film minimal thickness preferably is controlled at 0.05～0.44mm;
(2), with said colorant and preserve moisture, anticorrosion, getter MAT'L is adsorbed on the paper;
Can adopt the paper of common good water absorption, adsorption method can be spraying or impregnating method.
(3), the film of above-mentioned steps (1) is made sack, the paper with step (2) gained is pasted on the sack inwall again; Perhaps earlier paper being pasted on the one side of film, is outer again with the thin layer, and ply of paper is that internal layer is made sack together.
The size of sack and shape can be decided as required.
Said colorant can be obtained by lichee leaf or other green leaf or vegetable leaf extraction in the said method.Concrete grammar is: make extractant with acetone, in greenery: the ratio of acetone=1: 8～20 extracted 10～30 hours at normal temperatures, crossed leaching filtrate then, added 0.01～0.10% glycerine or 0.05～2.0% HCl, behind the mixing, can or soak on paper for spraying.
Saidly in the said method preserve moisture, compound method anticorrosion, getter MAT'L is generally: shitosan with HAc (acetate) or citric acid dissolving, and is mixed with 0.05～5.0% chitosan aqueous solution (pH value transfers to 2～5).What add 0.05～5.0% vitamin C and 0.01～0.05% again is selected from septichen, fragrant grass aldehyde, diisopropanolamine, 2-(thiazole-4-yl) benzo imidazole, 2, among the 4-D etc. one or more can or soak on paper for spraying behind mixing.
Freshness protection package for preventing litchi from browing of the present invention, owing to adopted the two-layer composite of PE film and paper, and in PE film and paper, add respectively and be adsorbed with pernicious gases such as to absorb 200～700nm wavelength light and CO2 and preserve moisture, oxygen uptake, the anticorrosion composition that waits, therefore, freshness protection package of the present invention is except the functions such as spontaneous controlled-atmosphere that kept existing PE freshness protection package and have, also have following characteristics: (1) is to the transmitance in 200～700nm spectral region (T), existing PE freshness protection package is 60～82%, freshness protection package of the present invention is below 10%, so freshness protection package of the present invention can stop the light in 200～700nm range of wavelength to pass through effectively, the radical reaction that deduction and exemption lichee pericarp chemically reactive substance is easily brought out, thereby prolong the life-span of pericarp membrane, the purpose that reaches anti-brown stain and prolong storage period; (2) paper of freshness protection package internal layer of the present invention can prevent a bag inwall ponding effectively, thereby the dissolving or the degraded of deduction and exemption anthocyanin can also be kept the water balance in the bag, prevent excessive dehydration; (3) can reduce or remit the mechanical damage of bringing because of storing effectively, reduce the chance of courses of infection; (4) can absorb the field heat and the pernicious gas of fruit, reduce respiratory intensity; (5) antistaling agent steam can be discharged, growing and breeding of germ can be suppressed effectively.In sum, freshness protection package of the present invention can prolong the storing life-span and the shelf life of lichee significantly, soak the fruit fresh-keeping method with the chemicals that generally uses in the past and compare, have use easy and simple to handle, effective, be convenient to promote advantage such as employings, be that lichee is prevented brown fresh-keeping more satisfactory method.
Freshness protection package of the present invention also is applicable to the fresh-keeping of longan and other fruit.
The invention will be further described with the test example by the following examples.
Embodiment 1 to 4
(1) preparation of outer PE thin layer: add in the PE raw material and press the Charge and the auxiliary material of proportioning shown in the table 1, make the PE bag film with the conventional method for preparing the common PE bag.
Table 1 is the used Charge of each embodiment and each composition of auxiliary material shared percent by weight in the PE material.The composition of A in the table 1～G representative is respectively: A:1-chloro-2-methyl-3-isothiazolone, and B: gaultherolin, C:2,2 '-the dihydroxyl diethylamine, D:2-hydroxyl-4-oxy-octyl benzophenone, E: phthalocyanine blue, F: phthalocyanine green, G: carbon black.
(2) preparation of internal layer paper: the preparation of colorant: get the lichee leaf and smash to pieces, with 80% acetone in greenery: the ratio normal temperature of acetone=1: 10 (W/W) extraction down filtered after 24 hours, got filtrate, press adding glycerine of proportioning shown in the table 2 or HCl, and is stand-by behind the mixing.
Preserve moisture, the preparation of anticorrosion, getter MAT'L: press proportioning shown in the table 2,, be mixed with chitosan aqueous solution, transfer PH to 2～5, add vitamin C and septichen etc. again with acetate or citric acid dissolving shitosan, stand-by behind the mixing.
Table 2 be among the embodiment 1 to 4 the preparation colorant and preserve moisture, anticorrosion, the used relevant composition of getter MAT'L and consumption (percent by weight) thereof, the composition of A in the table 2～K representative is respectively: A: glycerine, B:HCl, C:HAc, D: citric acid, E: chitosan aqueous solution concentration, F: vitamin C, G: septichen, H: fragrant grass aldehyde, I: diisopropanolamine, J:2-(thiazole-4-yl) benzimidazole, K:2,4-D.
Adopt the paper of common good water absorption, with spray-on process spray colorant make drenched, spray again after drying up preserve moisture, anticorrosion, getter MAT'L makes drenchedly, after drying up, is pasted on above-mentioned PE bag film inwall, promptly makes freshness protection package for preventing litchi from browing of the present invention.
Test example 1
To gather after the fresh lichee that the fruit quality inspection is tested (Hei Ye or the osmanthus flavor kind) freshness protection package of the present invention of packing into, use the bungee tying, (25～32 ℃) preserve (selling or storing) under the normal temperature, 7～10 days, the color, smell and taste of lichee and nutritional quality are constant substantially, long 2～5 days of the shelf life of comparison photograph (common PE freshness protection package).
Test example 2
To gather after the fresh lichee that the fruit quality inspection is tested (Hei Ye or osmanthus flavor kind) soaks precooling 4～6 minutes with frozen water, reinstall freshness protection package of the present invention, use the bungee tying, Keeping life can reach 25～35 days under 2～5 ℃ of low temperature, the color, smell and taste of lichee and nutritional quality are constant substantially, and comparison was shone (common PE freshness protection package) long shelf-life 10～20 days.
Table 1
| Embodiment | A | B | C | D | E | F | G |
| 1 2 3 4 | 0.02 0.05 0.03 0.01 | 0.02 0.05 0.01 0.01 | 0.02 0.05 0.05 0.01 | 0.2 0.05 0.1 0.1 | 0.02 | 0.05 | 0.5 1.0 |
Table 2
| Embodiment | A | B | C | D | E | F | G | H | I | J | K |
| 1 2 3 4 | 0.05 0.1 | 0.1 1.0 | √ √ | √ √ | 0.5 0.05 1.0 2.0 | 2.0 0.05 5.0 1.0 | 0.05 0.02 0.01 | 0.02 | 0.01 | 0.03 | 0.02 |
Annotate: this composition is selected in " √ " number expression in the table
Claims (7)
1, a kind of freshness protection package for preventing litchi from browing, it is characterized in that this freshness protection package is a double-decker, skin is for the polyethylene raw material and can absorb 200～700nm wavelength light and CO2 and the Charge of an antisepsis and the polyethylene foil that auxiliary material is made, and internal layer is to be adsorbed with colorant and paper fresh-keeping, anticorrosion, getter MAT'L.
2, according to the described freshness protection package of claim 1, it is characterized in that the Charge in the said outer layer polyethylene film and the composition and the proportioning of auxiliary material are calculated as by shared mass percent: 1-chloro-2-methyl-3-isothiazolone 0.01～0.1, gaultherolin 0.01～0.1,2,2 '-dihydroxyl diethylamine 0.01～0.05, UV-531 0.01～1.0, and phthalocyanine green 0.01～0.1 or phthalocyanine blue 0.01～1.0 or carbon black 0.1～1.0.
3, according to the described freshness protection package of claim 1, the adsorbed colorant of paper that it is characterized in that said internal layer comprises one or more in chlorophyll, lutein, carotene or other food coloring, insulation, anticorrosion, getter MAT'L comprise shitosan, vitamin C and are selected from septichen, fragrant grass aldehyde, diisopropanolamine, diethanolamine (DEA), 2-(thiazole-4-yl) benzimidazole and 2, one or more among the 4-D.
4, according to claim 1,2 or 3 described freshness protection packages, the thickness that it is characterized in that outer field polyethylene foil is 0.05～0.44mm.
5, a kind of preparation method as one of claim 1-4 described freshness protection package may further comprise the steps:
(1), by required proportioning polyethylene raw material and said Charge and auxiliary material one are reinstated conventional approach and make film;
(2), with said colorant and preserve moisture, anticorrosion, getter MAT'L is adsorbed on the paper;
(3), film that step (1) is made makes sack, the paper with step (2) is pasted on the sack inwall again; Perhaps earlier the paper of step (2) is pasted on the one side of film of step (1), makes sack more together, it is outer making film, and paper is internal layer.
6, in accordance with the method for claim 5, it is characterized in that said colorant is obtained by lichee leaf or other green leaves or vegetable leaf extraction, concrete grammar is: make extractant with acetone, in greenery: the ratio of acetone=1: 8～20 mass ratios extracted 10～30 hours at normal temperatures, cross leaching filtrate then, by the glycerine of mass ratio adding 0.01～0.10% or 0.05～2.0% HCl, supply behind the mixing to spray or soak on paper again.
7, in accordance with the method for claim 5, it is characterized in that saidly preserving moisture, compound method anticorrosion, getter MAT'L is: with shitosan with acetate or citric acid dissolving, and be mixed with the chitosan aqueous solution of 0.05～5.0% mass ratio, transfer pH to 2～5, what add 0.05～5.0 vitamin C and 0.01～0.05 more by mass percentage is selected from septichen, fragrant grass aldehyde, diisopropanolamine, 2-(thiazole-4-yl) benzimidazole and 2, among the 4-D one or more supply behind mixing to spray or soak on paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117122A CN1075455C (en) | 1999-09-30 | 1999-09-30 | Freshness protection package for preventing litchi from browing and its preparing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117122A CN1075455C (en) | 1999-09-30 | 1999-09-30 | Freshness protection package for preventing litchi from browing and its preparing process |
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| Publication Number | Publication Date |
|---|---|
| CN1249263A CN1249263A (en) | 2000-04-05 |
| CN1075455C true CN1075455C (en) | 2001-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99117122A Expired - Fee Related CN1075455C (en) | 1999-09-30 | 1999-09-30 | Freshness protection package for preventing litchi from browing and its preparing process |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101999638B (en) * | 2010-12-22 | 2013-03-13 | 厦门大学 | Tyrosinase inhibitor-based fruit and vegetable color fixative and preparation method thereof |
| CN105625103A (en) * | 2016-02-18 | 2016-06-01 | 浙江华川实业集团有限公司 | Apple bagging paper and method for manufacturing same |
| CN110302679A (en) * | 2018-03-20 | 2019-10-08 | 中国石油化工股份有限公司 | Wet film of a kind of intelligence control and its preparation method and application |
| CN109169871B (en) * | 2018-09-06 | 2022-03-11 | 广东省农业科学院蚕业与农产品加工研究所 | Litchi preservation method |
| CN115530231B (en) * | 2022-06-15 | 2024-02-06 | 广东省农业科学院果树研究所 | Fresh-keeping method suitable for litchi transportation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102995A (en) * | 1987-04-22 | 1988-01-13 | 河北农业大学 | Fruit and vegetable fresh preservation film or bag film |
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1999
- 1999-09-30 CN CN99117122A patent/CN1075455C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102995A (en) * | 1987-04-22 | 1988-01-13 | 河北农业大学 | Fruit and vegetable fresh preservation film or bag film |
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| CN1249263A (en) | 2000-04-05 |
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