CN104974490B - Preservative film, preparation and application - Google Patents
Preservative film, preparation and application Download PDFInfo
- Publication number
- CN104974490B CN104974490B CN201510398785.7A CN201510398785A CN104974490B CN 104974490 B CN104974490 B CN 104974490B CN 201510398785 A CN201510398785 A CN 201510398785A CN 104974490 B CN104974490 B CN 104974490B
- Authority
- CN
- China
- Prior art keywords
- film
- aluminium silicate
- powder
- preservative film
- preservative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Packages (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
Abstract
A preservative film, preparation and application, belonging to the technical field of packaging materials. The polylactic acid film modified by aluminum silicate, wherein the content of aluminum silicate porous powder is 5-15 wt%, the silicon-aluminum ratio of the aluminum silicate porous powder is 25-28, and the average grain diameter of the powder is 1-5 microns. The preservative film has high water vapor permeability, moderate oxygen transmission rate and carbon dioxide permeability, and also has ethylene removal (ethylene adsorption) performance, when the preservative bag with four active functions is filled with cherries, a self-modified atmosphere environment with low carbon dioxide concentration and low oxygen (relative to air) is formed in the preservative bag, and the preservative film is particularly suitable for the preservation of the cherries and can preserve the cherries for 4-6 days at normal temperature.
Description
Technical field
The present invention relates to a kind of preservative film, for Fructus Pruni pseudocerasi normal-temperature fresh-keeping, belong to packaging material technology
Field.
Background technology
Continuing to Repiration after fresh fruit picking, nutritional labeling aoxidizes, and releases heat
Amount, produces the metabolites such as moisture, carbon dioxide, ethylene；Under normal temperature environment, fruit and vegerable are exhaled
Inhale speed the strongest, the easiest aging of fruit and vegerable, dehydration and lose commercial value；Common fresh-keeping
In the closed environment that bag is formed, breathing ethylene, carbon dioxide and the moisture produced can not be timely
It is rejected to the external world, can be enriched with in freshness protection package.The ethylene of enrichment can accelerate fruit and vegerable and breathe speed
Rate, accelerates fruit and vegerable ripe；The high humility ring that the moisture that Repiration produces is formed in freshness protection package
Border, makes fruit and vegerable be easier to grow pathogen, causes fruit and vegerable to rot；The carbon dioxide of higher concentration
Also can promote some fruit that old and feeble, rotten or brown stain occurs.Therefore reduce fruit and vegerable breathing rate,
Keep low humidity storage condition, prevent from growing pathogen, set up a suitable hypoxia, low by two
Carbonoxide atmosphere is the key solving preserving fruit and vegetable utilizing problem, develops many fruits for these people
Vegetables preservation method and technology, such as low temperature, controlled atmosphere, dipping, pharmacy fumigation etc..
Polylactic acid is a kind of macromolecular material renewable, degradable, has higher steam
Transmitance and OTR oxygen transmission rate, compare and be suitable as Fresh-Keeping Packaging Materials, but with polylactic acid
The research report preparing fruit fresh-keeping bag specially for raw material is little.Patent CN103252964A is public
Having opened a kind of polylactic acid film and preparation method thereof, this thin film includes polylactic acid sandwich layer and is attached to
The smooth surface layer of at least one side surface of described polylactic acid sandwich layer；CN104312121A is the most public
Open a kind of method improving polylactic resin toughness；CN104387732A toughener, lubrication
Agent, opening agent etc. increase the toughness of polylactic acid film, the transparency；CN103232689A utilizes
Plasticizer, montmorillonite, the toughness of antioxidant raising polylactic acid；CN104479315A then leads to
Cross interpolation modified montmorillonoid, modified kaolin or modified white carbon black as reinforcing agent, epoxies third
Olefin(e) acid copolymer, as compatilizer, polydactyl acid, increases the toughness of polylactic acid film；
CN103724957A utilizes layered nano silicate, lignin, compatilizer and ultra-fine titanium dioxide
Titanium improves the mechanical property of polylactic acid, increases the transparency and flexibility；CN103232691A
Then disclosing one utilizes modified superfine calcium carbonate, antistatic additive to improve polylactic acid film antistatic behaviour
The technique of energy；CN102702702A utilizes polylactic resin and the poly-breast of more carboxyl polymer preparation
Acid modified film, its elongation at break and intensity all have obvious raising；CN101250295
A kind of PE modified polylactic acid degradable thin film utilizing 50%～80% weight portion is disclosed；
CN101328307 utilize polylactic acid and other resin alloy prepare low moisture-vapor transmission (15～
Thin film 25g/m224h)；CN102241876A utilizes modified Nano grade silicon dioxide, plasticising
Agent, antioxidant, lubricant modified polylactic acid, improve hot strength and the fracture of polylactic acid film
Percentage elongation；CN104048958A prepares one with polylactic acid film for base material and can indicate that fresh-keeping
CO in bag2The food freshness instruction card of concentration.
Knowable to being analyzed above, with polylactic acid for raw material prepare the correlational study of packaging material many with
For the purpose of improving the strength of materials, improving barrier, improve toughness, modifying agent used mostly is nanometer
Silicon dioxide, plasticizer, antioxidant, lubricant, titanium dioxide, montmorillonite, Kaolin or
Modified white carbon blacks etc., although and preservative film involved in the present invention is also adopted by polylactic acid is raw material system
Standby, but this polylactic acid film has the most different from above-mentioned polylactic acid relevant report, the present invention
Described polylactic acid film has higher water vapo(u)r transmission, moderate OTR oxygen transmission rate and dioxy
Change carbon transmitance and ethylene absorption totally four kinds of active functions.
Summary of the invention
It is an object of the invention to provide and a kind of there is higher water vapo(u)r transmission, moderate oxygen
The preservative film of transmitance and carbon dioxide transmission rate and ethylene absorption totally four kinds of active functions,
For preparing freshness protection package, preserve fruit, especially Fructus Pruni pseudocerasi.
Preservative film of the present invention is the polylactic acid film that aluminium silicate is modified, and preservative film thickness is 10-20
Micron, wherein dispersed in preservative film have aluminium silicate voluminous powder, and aluminium silicate voluminous powder contains
Amount is 5-15wt%, and the silica alumina ratio of this aluminium silicate voluminous powder is 25-28, the average particle of powder
Footpath is 1-5 micron.
The preparation of preservative film:
(1) the aluminium silicate voluminous powder that silica alumina ratio is 25-28 is first prepared；
Aluminum nitrate by sodium hydroxide with become Alkaline Sodium Aluminate Solution, then with waterglass (silicic acid
Sodium) with certain mol ratio (Si:Al=25-28) mixing, this mixed liquor sulphuric acid is neutralized to
PH=6.5-5.5, generates gel, is heated to 80-95 DEG C with vigorous stirring and generates Bio-sil,
Then settle, soak, wash, filter, be dried (such as 120-150 DEG C, 5 hours), calcination
(such as 550-600 DEG C, 2 hours), pulverizing obtain the aluminium silicate powder that particle diameter is 1-5 micron.
(2) modified polylactic resin is produced；By the aluminium silicate voluminous powder that silica alumina ratio is 25-28
After polylactic resin mechanical blending, melt altogether at 160-190 DEG C on the twin screw extruder
Pelletize after mixed.
(3) preparing on film casting production line, the thickness of thin film is 10-20 micron.
As used the technique producing four active function normal-temperature fresh-keeping bags.
The preservative film of the present invention is used for preparing Fruit fresh-preservation bag, and is exclusively used in the preservation of Fructus Pruni pseudocerasi.
The synthetic aluminium silicate voluminous powder that described polylactic acid is 25-28 by a kind of silica alumina ratio is changed
Property, this aluminium silicate powder foot couple ethylene has selection absorbability, absorbs the ability of ethylene not by steam
Impact, 1 gram of this powder can absorb 3 liters of ethylene gas, and this has the powder of specific silicon aluminum ratio
After end is blended in polylactic acid film, this polylactic acid film has just possessed ethylene absorption activity merit
Can, the aluminium silicate powder particle of a diameter of 1-5 micron is scattered in the polylactic acid that 10-20 micron is thick
In thin film, the hydrophilic of aluminium silicate adds the thin film permeability to steam, makes the water of thin film
Vapor transmission rates is up to 60-200g/m2.day.atm, the aluminium silicate of porous adds thin film to oxygen
Gas and the transmitance of carbon dioxide, make thin film reach the transmitance of oxygen and carbon dioxide
104-105ml/m2.day.atm.The higher water that this aluminium silicate polydactyl acid thin film has steams
Vapor permeability, it is ensured that form a relatively low humidity environment in freshness protection package, prevent moisture at thin film
Inner side condensation, also avoids high humidity environment to induce breed bacteria；This kind of being weak to such as Fructus Pruni pseudocerasi are stored up
The fruit hidden, the OTR oxygen transmission rate of general packing film and carbon dioxide transmission rate are difficult to meet
Fresh-keeping requirement under its room temperature because breathability too low usually cause by fresh-keeping fruit because of anoxia and
Carbon dioxide is enriched with and crosses presenility, and shelf life shortens on the contrary.Cherry of the present invention
The special four active function normal-temperature fresh-keeping bags of Fructus Persicae solve these problems.With the fresh-keeping Fructus Pruni pseudocerasi of this freshness protection package
Deng fruit, can just form hypoxia (relative to air), a low dioxy in this freshness protection package
Change carbon, the controlled atmosphere environment of low humidity, and thin film can absorb the ethylene that Fructus Pruni pseudocerasi Repiration produces
Gas, eliminates the ethylene dematuration to Fructus Pruni pseudocerasi, can reach 4-6 days with fresh-keeping Fructus Pruni pseudocerasi under room temperature,
Fruit infection rate is less than 10%, is remained in that vivid green by fresh-keeping Fructus Pruni pseudocerasi, and mouthfeel is with just
Compare during harvesting and there is no difference.
Detailed description of the invention
Utilizing bag production line that the polydactyl acid thin film obtained is sealed into overall dimensions is 22
The freshness protection package of the three side sealing of × 25 centimetres.This freshness protection package has water vapo(u)r transmission, moderate oxygen
Vapor permeability and carbon dioxide transmission rate and ethylene absorption totally four kinds of active functions, the suitableeest
Together in large cherry at normal temperatures fresh-keeping.
Performance test
The ethylene absorption performance test of aluminium silicate powder: weigh powder after 1 gram of calcination, be placed in second
In alkene gas, measure powder weightening finish, be then convert into the normal volume of ethylene.
Aluminium silicate polydactyl acid thin film breathability test: the test of moisture-vapor transmission according to
" GB/T 1037-88 plastic sheeting and sheet material water vapor permeability test method ", thin film cutting
One-tenth area is 50cm2Circle, the model using Mocon company of the U.S. is Model 3/33 steam
Transmission measurement instrument is tested；According to " GB/T 1038-2000 plastic sheeting and thin slice gas are saturating
The property crossed test method pressure differential method " OTR oxygen transmission rate of testing film, test instrunment is the U.S.
Mocon company model is the OTR oxygen transmission rate tester of 8001.
Each fresh-keeping packed 500 grams of large cherry, test the gas concentration lwevel in freshness protection package every day
And oxygen concentration.
Below in conjunction with embodiment the present invention done and illustrates furtherly, but the present invention be not limited to
Lower embodiment.
Embodiment 1
Weigh 613 grams of ANN aluminium nitrate nonahydrate (Al (NO3)3·9H2O), 10000 milliliters it are dissolved in
Distilled water in, stirring under conditions of, be neutralized to the sodium hydroxide solution of 5mol/L
PH=10；Then being that the sodium silicate water glass of 40 ° of Be mixes with 10000 grams of Baume degrees, limit is stirred
While be neutralized to PH=5.5 with the sulfuric acid solution of 5mol/L, then heat to 95 DEG C, be stirred vigorously 1
Hour；Stopping stirring, sedimentation, separate, filter, filter cake is washed with distilled water to sulfate radical-free
Ion, dries 5 hours, then 600 DEG C of roastings 2 hours, then utilizes comminution by gas stream for 140 DEG C
It is 1 micron that equipment is crushed to mean diameter, obtains the aluminium silicate powder that silica alumina ratio is 28.
Aluminium silicate powder and 4500 grams of polylactic resin that above 500 grams of silica alumina ratios are 28 are melted
Pelletize is blended, then pellet is cast into the thin film of 10 microns.The OTR oxygen transmission rate of testing film
And moisture-vapor transmission (CO (OTR)2TR), utilize bag production line by this polylactic acid film
It is prepared as the freshness protection package of the three side sealing that overall dimensions is 22 × 25 centimetres, loads 500 grams of large cherry
Post heat-seal, deposits in the environment of 25 ± 5 DEG C, tests headspace gas composition in freshness protection package every day,
And the decayed fruit rate (courses of infection rate) of Fructus Pruni pseudocerasi in freshness protection package.
Embodiment 2
Weigh 686 grams of ANN aluminium nitrate nonahydrate (Al (NO3)3·9H2O), 10000 milliliters it are dissolved in
Distilled water in, stirring under conditions of, be neutralized to the sodium hydroxide solution of 5mol/L
PH=10；Then being that the sodium silicate water glass of 40 ° of Be mixes with 10000 grams of Baume degrees, limit is stirred
While be neutralized to PH=6.5 with the sulfuric acid solution of 5mol/L, then heat to 80 DEG C, be stirred vigorously 1
Hour；Stopping stirring, sedimentation, separate, filter, filter cake is washed with distilled water to sulfate radical-free
Ion, dries 5 hours, then 550 DEG C of roastings 2 hours, then utilizes comminution by gas stream for 150 DEG C
It is 5 microns that equipment is crushed to particle diameter, obtains the aluminium silicate powder that silica alumina ratio is 25.
By aluminium silicate powder that 500 grams of silica alumina ratios are 25 and 4500 grams of polylactic resin melt blendings
Pelletize, is then cast into the thin film of 10 microns by pellet.The OTR oxygen transmission rate (OTR) of testing film
With moisture-vapor transmission (CO2TR), bag production line is utilized to be prepared as by this polylactic acid film
Overall dimensions is the freshness protection package of the three side sealing of 22 × 25 centimetres, loads 500 grams of large cherry post heat-seal,
The environment of 25 ± 5 DEG C is deposited, tests headspace gas composition in freshness protection package, Yi Jibao every day
The decayed fruit rate (courses of infection rate) of Fructus Pruni pseudocerasi in fresh bag.
Embodiment 3
Weigh 636 grams of ANN aluminium nitrate nonahydrate (Al (NO3)3·9H2O), 10000 milliliters it are dissolved in
Distilled water in, stirring under conditions of, be neutralized to the sodium hydroxide solution of 5mol/L
PH=10；Then being that the sodium silicate water glass of 40 ° of Be mixes with 10000 grams of Baume degrees, limit is stirred
While be neutralized to PH=6.0 with the sulfuric acid solution of 5mol/L, then heat to 85 DEG C, be stirred vigorously 1
Hour；Stopping stirring, sedimentation, separate, filter, filter cake is washed with distilled water to sulfate radical-free
Ion, dries 5 hours, then 570 DEG C of roastings 2 hours, then utilizes comminution by gas stream for 140 DEG C
It is 3 microns that equipment is crushed to particle diameter, obtains the aluminium silicate powder that silica alumina ratio is 27.
By aluminium silicate powder that 500 grams of silica alumina ratios are 27 and 4500 grams of polylactic resin melt blendings
Pelletize, is then cast into the thin film of 15 microns by pellet.The OTR oxygen transmission rate (OTR) of testing film
With moisture-vapor transmission (CO2TR), bag production line is utilized to be prepared as by this polylactic acid film
Overall dimensions is the freshness protection package of the three side sealing of 22 × 25 centimetres, after loading 500 grams of large cherry, pricks
Tight bag mouth, deposits in the environment of 25 ± 5 DEG C, tests headspace gas composition in freshness protection package every day,
And the decayed fruit rate (courses of infection rate) of Fructus Pruni pseudocerasi in freshness protection package.
Comparative example 1
The food-grade polyethylene preservative film utilizing commercially available thickness to be 10 microns, is prepared as profile chi
The freshness protection package of the very little three side sealing being 22 × 25 centimetres, loads 500 grams of large cherry post heat-seal, 25
The environment of ± 5 DEG C is deposited, tests headspace gas composition in freshness protection package, and freshness protection package every day
The decayed fruit rate (courses of infection rate) of interior Fructus Pruni pseudocerasi.
Comparative example 2
The food polyethylene film utilizing commercially available thickness to be 20 microns, is prepared as overall dimensions
It is the freshness protection package of the three side sealing of 22 × 25 centimetres, loads 500 grams of large cherry post heat-seal, 25 ±
The environment of 5 DEG C is deposited, tests headspace gas composition in freshness protection package every day, and in freshness protection package
The decayed fruit rate (courses of infection rate) of Fructus Pruni pseudocerasi.
Comparative example 3
In the naked air ambient being placed on 25 ± 5 DEG C of large cherry, observe decayed fruit situation
Tables 1 and 2 lists fresh-keeping to large cherry of the four active function freshness protection packages utilizing the present invention to prepare
Effect.The most naked large cherry (comparative example 3) the easily dehydration put softens, and grows cause of disease
Bacterium, naked put the 3rd day fruit 50% and softens, and 20% occurs mildew, loses commercial value,
The naked Fructus Pruni pseudocerasi shelf life put is short, only about 2 days, main reason is that the Fructus Pruni pseudocerasi after adopting is at sky
In gas, metabolic rate is vigorous, ripe rapidly, softens；(comparative example in common preservative film
1) Fructus Pruni pseudocerasi preserved, because the oxygen that the air concentration in polyethylene preservative film is less than extraneous 20%
Gas concentration, can reduce the breathing rate of Fructus Pruni pseudocerasi to a certain extent, but due to this thin film pair
The transmitance of steam is the lowest, and Fructus Pruni pseudocerasi is breathed the moisture produced and is enriched with in preservative film, causes bag
Interior relative humidity (RH) increases, and therefore stores under room temperature and is easier to occur to rot than naked group of putting,
After preserving 3 days, in bag, RH enrichment makes Fructus Pruni pseudocerasi rot rapidly；Thin at 20 microns of PE
Fructus Pruni pseudocerasi in film (comparative example 2), owing to sack breathability is worse, causes Fructus Pruni pseudocerasi to breathe and produces
Steam be difficult to get rid of, only had 1 day by fresh-keeping Fructus Pruni pseudocerasi shelf life.Of the present invention four live
Sexual function antistaling film, bag internal oxygen gas concentration is less than extraneous 2-5%, it is suppressed that the breathing of Fructus Pruni pseudocerasi,
Slow down the generation of climacteric, the freshness protection package of this type has cross-country traveling ability to steam,
Can get rid of Fructus Pruni pseudocerasi in time and breathe the moisture generated, RH relatively low in keeping bag, suppression is grown
Pathogen, in freshness protection package, gas concentration lwevel relatively matched group 1 and matched group 2 are low, beneficially Fructus Pruni pseudocerasi
Fresh-keeping, prevent Fructus Pruni pseudocerasi old and feeble, by the Fructus Pruni pseudocerasi that four active function freshness protection packages described in this patent are fresh-keeping
Outward appearance is vivid as before, mouthfeel does not has any change, and Fructus Pruni pseudocerasi when fresh-keeping 6 days also has business valency
Value, decayed fruit is less than 10%.Described in this patent, four active function freshness protection packages are fresh-keeping is particularly suitable for cherry
Fresh-keeping under the fruit room temperature such as Fructus Persicae.
The performance indications of table 1 aluminium silicate polydactyl acid thin film and the fresh-keeping fresh fruit to large cherry
The table 2 aluminium silicate polydactyl acid thin film fresh-keeping effect to large cherry
Claims (3)
1. the preparation method of a fruit freshness preserving film, it is characterised in that fruit freshness preserving film is the poly-breast that aluminium silicate is modified
Acid thin film, wherein dispersed in preservative film have aluminium silicate voluminous powder, and aluminium silicate voluminous powder content is
5-15wt%, the silica alumina ratio of this aluminium silicate voluminous powder is 25-28, and the mean diameter of powder is 1-5 micron；
Comprise the following steps:
(1) the aluminium silicate voluminous powder that silica alumina ratio is 25-28 is first prepared；
(2) modified polylactic resin is produced；By aluminium silicate voluminous powder that silica alumina ratio is 25-28 and polylactic acid
After resin mechanical blending, pelletize after melt blending at 160-190 DEG C on the twin screw extruder；
(3) prepare on film casting production line；
Silica alumina ratio is the preparation of the aluminium silicate voluminous powder of 25-28: aluminum nitrate by sodium hydroxide with become alkalescence sodium aluminate
Solution, then with waterglass with certain mixed in molar ratio, this mixed liquor sulphuric acid is neutralized to pH=6.5-5.5,
Generate gel, be heated to 80-95 DEG C with vigorous stirring and generate Bio-sil, then settle, soak, wash,
Filtration, dry, calcination, pulverize and obtain the aluminium silicate powder that particle diameter is 1-5 micron.
2. the preservative film that prepared by the method for claim 1 is for preparing Fruit fresh-preservation bag.
3. the preservative film that prepared by the method for claim 1 is for preparing Fructus Pruni pseudocerasi freshness protection package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398785.7A CN104974490B (en) | 2015-07-08 | 2015-07-08 | Preservative film, preparation and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398785.7A CN104974490B (en) | 2015-07-08 | 2015-07-08 | Preservative film, preparation and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104974490A CN104974490A (en) | 2015-10-14 |
| CN104974490B true CN104974490B (en) | 2016-09-28 |
Family
ID=54271480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510398785.7A Active CN104974490B (en) | 2015-07-08 | 2015-07-08 | Preservative film, preparation and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104974490B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385126A (en) * | 2015-12-17 | 2016-03-09 | 梅庆波 | Polylactic acid / porous geopolymer composite material preparation method |
| CN106987106A (en) * | 2017-04-21 | 2017-07-28 | 戴琪 | A kind of preparation method for removing ethene antibacterial and mouldproof fruit-vegetable plastic wrap |
| CN107641300A (en) * | 2017-10-09 | 2018-01-30 | 常州美帛纺织品有限公司 | A kind of preparation method of vapor-permeable type polyethylene terephthalate thin film |
| CN114956107B (en) * | 2022-07-15 | 2023-11-07 | 大家智合(北京)网络科技股份有限公司 | Modified aluminum silicate powder and preparation method thereof, degradable composite film and preparation method and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235156B (en) * | 2007-11-16 | 2011-04-20 | 江苏科技大学 | Polylactic acid/thermoplastic starch extrusion blow molding film and its producing method and application |
| CN101955639A (en) * | 2010-09-29 | 2011-01-26 | 江苏天仁生物材料有限公司 | Modified polylactic acid material and preparation method and application thereof |
| CN101967245B (en) * | 2010-10-22 | 2012-08-15 | 北京印刷学院 | Fruit-preserving green packing material with ethylene adsorption function and preparation method thereof |
| CN102827464B (en) * | 2012-09-04 | 2014-08-13 | 天津盛天利材料科技有限公司 | Environment friendly biological preservative film and preparation method thereof |
-
2015
- 2015-07-08 CN CN201510398785.7A patent/CN104974490B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104974490A (en) | 2015-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104974490B (en) | Preservative film, preparation and application | |
| CN101601420B (en) | Controlled-bactericide-release fruit and vegetable preservative packaging composite film, preparation method thereof, and use thereof | |
| CN102863685B (en) | Fresh-keeping packaging material for tomatoes | |
| CN104151691B (en) | Nano preservative film for preventing edible fungus from deterioration and application thereof | |
| CN101311074B (en) | Green tea fresh-keeping nano packaging wrapper and use thereof | |
| CN104194064B (en) | Corn starch composite membrane as well as preparation method and applications thereof | |
| CN101817939A (en) | Venting, self-cleaning and degradable environmental-friendly preservative film and preparation method thereof | |
| CN104610581A (en) | Degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables | |
| CN102079834A (en) | Method for preparing modified atmosphere fresh-keeping film for fruits and vegetables | |
| CN101979432A (en) | Fruit fresh-keeping packaging material with high air permeability and preparation method thereof | |
| Mittal et al. | Development of poly (hydroxybutyrate) film incorporated with nano silica and clove essential oil intended for active packaging of brown bread | |
| CN102422880B (en) | Slow-release preservative for fruits and vegetables and preparation method thereof | |
| CN109695179A (en) | Fruits and vegetables store active fresh-keeping carton and preparation method thereof | |
| CN112442222A (en) | Plastic packaging material with antibacterial and fresh-keeping functions and preparation method thereof | |
| CN106081345B (en) | A kind of compound fruits and vegetables fresh-keeping paper and preparation method and application method | |
| Jiang et al. | Preparation and characterization of nano-SiO2-modified emulsified film and its application for strawberry preservation | |
| JP3824915B2 (en) | Freshness-keeping packaging material, fruit and vegetable packaging, and freshness-keeping packaging method | |
| CN108410023A (en) | A kind of environment-protective packaging film made using plant amylum | |
| JP2000239454A (en) | Polyolefin composition | |
| CN105419111A (en) | Anti-bacterial, moisture-preserving and fresh-keeping packaging film for apples and pears | |
| CN105150510B (en) | A kind of Wholly-degradable pla-pcl film and its production method and its purposes | |
| CN107177089A (en) | A kind of micropore preservative film for garden stuff and preparation method thereof | |
| KR101537597B1 (en) | Composition of Film for freshness preservation of agricultural and Film Manufacturing Thereof | |
| CN101278755A (en) | Biological dosage form constant pressure deoxidizing agent | |
| KR20180083156A (en) | Freshness preserve composition comprising natural mineral and packing paper using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220513 Address after: 100036 Room 301, 3rd floor, building 1, District 5, yard 2, Cuiwei Road, Haidian District, Beijing Patentee after: Dajia Zhihe (Beijing) Network Technology Co.,Ltd. Address before: No. 1 Xinghua Road (two paragraph), Beijing, Daxing District Patentee before: BEIJING INSTITUTE OF GRAPHIC COMMUNICATION |