CN204916516U - Multi -functional integrated freshness protection package - Google Patents

Abstract

Multi -functional integrated freshness protection package belongs to the packaging material field. Use that ethylene adsorbs, ethylene suppresses, antibiotic, high carbon dioxide selects to see through, high vapor sees through the function film and as the raw materials film, therefrom selects 2 -5 kind function film preparation and go out multi -functional integrated freshness protection package for keeping fresh of high respiratory intensity fruit vegetables, specially adapted climacteric type fruit keeping fresh under normal atmospheric temperature.

Description

Multifunctional unit freshness protection package

Technical field

The present invention relates to fruit fresh-keeping packaging material, particularly relate to the multifunctional unit freshness protection packages such as there is high oxygen flow, permeable, saturating carbon dioxide, ethylene absorption, ethene suppression design, belong to packing field.

Background technology

Fresh fruit and vegetable still proceeds respiration after plucking, and the oxidation of nutritional labeling occurs, and releases heat, produces the metabolic products such as moisture, carbon dioxide, ethene; Under normal temperature, the naked environment put, fruits and vegetables respiratory rate is strong, fruits and vegetables easily old and feeble, dry out and lose commercial value; In the closed environment that common freshness protection package is formed, ethene, carbon dioxide and moisture can not be got rid of fully in time, and ethene can accelerate fruits and vegetables respiratory intensity, promote the further ripening and senscence of fruits and vegetables; The high humidity environment that the moisture that respiration produces is formed more easily grows pathogen, causes fruits and vegetables to rot; The aggravation that high carbon dioxide environment also can cause some fruits and vegetables to rot.Therefore reduce the respiratory rate of fruits and vegetables, keep moisture, prevent growing pathogen, set up a suitable hypoxemia, low carbon dioxide atmosphere is the key solving preserving fruit and vegetable utilizing problem, people develop many fruit and vegetable preserving methods and technology for this reason, such as temperature, controlled atmosphere, dipping, pharmacy fumigation.The kind of the functional antistaling film (freshness protection package) succeeded in developing is a lot.

Patent ZL03113758.X introduces a kind of freshness protection package be made up of nonwoven fabrics, has permeability to air high, does not bear water the feature of mist; In order to improve permeability to air, ZL201210466049.7 and ZL201310071920.8 is provided with some apertures on bag, and ZL200910034625.9 designs a silicon window on bag increases permeability to air; ZL200710061409.4 then introduces and in polythene material, adds air-permeable masterbatch make film, and then use up face twin rollers process, film is formed the aperture of diameter 1mm-1.5mm, pore density 50 ~ 1,000,000/square meter is to increase freshness protection package permeability to air; Patent 200810059439.6 adopts blending resin method of modifying to improve freshness protection package permeability to air, adds the composition such as silicon dioxide, rubber in poly-vinyl resin.

ZL201210275448.5 then introduces a kind of comparatively complicated freshness protection package design, and this freshness protection package comprises bag film and preformed hole, and preformed hole has upper strata labeling, for controlling the Push And Release of preformed hole; The freshness protection package design of ZL200720037273.9 is similar to above-identified patent, this freshness protection package comprises controlled atmosphere film, base material, adhesives and has the plastic bag of breather hole, in controlled atmosphere film and base material compound, being bonded in plastic bag by adhesives has on the position of breather hole, utilize the content of controlled atmosphere film to gases such as the oxygen in packaging bag and carbon dioxide to regulate, thus inhibit the respiratory intensity of fruits and vegetables.In order to increase bacteriostasis property, ZL201110334707.2 has invented a kind of electret preservative film, adopt polytetrafluoroethylene or ethylene-tetrafluoroethylene copolymer plastic warp processing refinement to make membraneous material, adopt electret corona method or Breakdown Method to carry out electret technical finesse; Enteromorpha fiber joins in paper pulp fiber by ZL201210588963.9 by a certain percentage, makes the freshness protection package containing enteromorpha fiber, in freshness protection package, finally smear the bacteriostasis of the half chitosan solution increase freshness protection package of 5%; ZL200710158884.3 introduce in PE film, add cinnamic acid, cinnamic acid to by fruit and vegetable preservation without discoloration.

Freshness protection package above has single layer structure, and many freshness protection packages have double-decker in addition.The freshness protection package that ZL201110368214.0 introduces is made up of breathe freely protective cover and fresh-keeping layer, and ventilative protective cover is provided with an observation window, and fresh-keeping layer is then made up of poly-vinyl resin, sodium alginate, shitosan; What ZL201220487692.3 introduced does not like being made up of outer bag and inner bag, and be provided with inner bag in outer bag, the bottom of outer bag and inner bag is bonding, is provided with heat-insulation layer between outer bag and inner bag.

Also has the freshness protection package of many 3-tier architectures in addition, ZL200710119153.8 develops a kind of air-adjustable fresh-keeping bag, be designed to three-decker from inside to outside, wherein bag is made up of air-conditioning preservative film, ventilative hydrophilic materials, air-permeable, hydrophobic material layer successively outer layers towards inner layers, and bag arranges involution district at each default paragraph place; The bag top of the freshness protection package of ZL201320479168.6 is built with sealing band, described bag is divided into fresh-keeping layer, moisturizing adsorbed layer and fresh-keeping air-permeable layer from outside to inside successively, wherein moisturizing adsorbed layer is provided with ethene adsorbent, and fresh-keeping air-permeable layer surface is provided with small ventilating holes.

Make the design of bag or bag being beaten micropore with nonwoven fabrics and cannot accurately control oxygen and steam breathability, to carbon dioxide through non-selectivity; In polyethylene or acrylic resin, add inorganic particulate or rubber constituent, can OTR oxygen transmission rate be increased, but not remarkable to the permeability increase of steam; Because silicon window area is less, be therefore difficult to fully appear aqueous vapor and carbon dioxide by it, and the design of silicon window causes freshness protection package tooling cost to increase; For the bag that those designs are complicated, increase productive costs, be difficult to form mass mechanized production; The freshness protection package of double-decker and three-decker design, their permeability to air can reduce, and often cause oxygen supply in freshness protection package not enough, steam can not be got rid of in time; In order to increase bacteria resistance function, ethylene absorption function and to add cartridge bag in freshness protection package be also common packaged form, but fruits and vegetables after cartridge bag breakage, can be polluted, or cartridge bag bactericide-release excessive concentration causes fruits and vegetables contaminated, loses local flavor.Existing vegetable and fruit packaging is often attended to one thing and lose sight of another, the function that single film design is difficult to realize high oxygen flow simultaneously, high permeable, high carbon dioxide selective penetrated property, antibacterial, ethylene absorption, ethene suppress, design that is double-deck or MULTILAYER COMPOSITE can increase function that is antibacterial, the suppression of ethylene absorption, ethene, but loses high oxygen flow, high permeable, high carbon dioxide crossing ability; The present invention adopts the design of multifunctional unit freshness protection package then successfully to solve these contradictions, the function making freshness protection package simultaneously have antibacterial, ethylene absorption, ethene to suppress, and has high oxygen flow simultaneously, high permeable, high carbon dioxide is selected to pass through function.

Summary of the invention

The utility model object is to provide multifunctional unit freshness protection package design and preparation method thereof.Utilize several functions film, multifunctional unit freshness protection package is produced in design.Be raw material film with them, be prepared into multifunctional unit film coil, be then prepared into multifunctional unit freshness protection package, all fresh-keeping functions making freshness protection package simultaneously have our material film to have, and various fresh-keeping function can not influence each other, and can not mutually weaken.

The integrated freshness protection package of described several functions be in following 5 kinds of materials at least two kinds be spliced:

Function film 1 (ANTI-MICROBIALS, AMfilms): the multi-layer compound film with intelligent slow-release bactericide function, can be how many according to being grown pathogen by fruit and vegetable preservation, film can discharge the gas phase bactericidal agent of variable concentrations automatically, this bactericidal agent can not produce any residual on fruits and vegetables, and the type of bactericidal agent meets international EC and FDA standard.

Function film 2 (ETHYLENEABSORBERS, EAfilms): the fruit freshness preserving packing film with ethylene adsorption function, the utility model preferably adopts ZL201010522442.4 to disclose a kind of fruit freshness preserving packing film with ethylene adsorption function, this film is by a certain proportion of aluminium silicate powder and poly-vinyl resin melt blending, then blown film obtains, it is high that it has ethylene absorption capacity, and ethylene absorption is not by the feature of influence of moisture.

Function film 3 (1-MCPreleasing, MRfilms): the laminated film with 1-MCP release function.1-methyl cyclopropene (1-MCP) gas can suppress fruits and vegetables to produce ethene, 1-MCP preparation on market is adsorbed on cyclodextrin carrier by 1-MCP, this cyclodextrin is dispersed in water, certain density 1-MCP gas can be discharged, fruits and vegetables are carried out stifling fresh-keeping; Because release concentration and deenergized period are difficult to accurate control, therefore application is restricted; The utility model preferably adopts a kind of laminated film with 1-MCP release function disclosed in CN102862361A, this film is automatic slowly-releasing gas phase 1-MCP after running into the steam of fruits and vegetables breathing generation, when fruits and vegetables respiratory intensity is large, in freshness protection package, relative humidity is high, the 1-MCP concentration of film release is larger, higher to the respiratory inhibition of fruits and vegetables, realize automatically slowing down adjustment to fruits and vegetables metabolism.

Function film 4 (HighCO ₂tRandOTRfilm, HCOfilms): a kind of film with high oxygen permeability and high carbon dioxide selection permeability to air, a kind of film with high oxygen permeability and high carbon dioxide selection permeability to air disclosed in preferred employing ZL201210363822.7, the OTR oxygen transmission rate (OTR) of film is 10 ⁵ml/m ².day.atm more than, and the transmitance (CO of preferably carbon dioxide ₂tR) be 6 times of OTR, the carbon dioxide that fruits and vegetables respiration produces can be got rid of in time, prevent the carbon dioxide enriched fruits and vegetables that cause old and feeble.

Function film 5 (HighMVTRfilm, HMfilms): ZL201010532453.0 discloses a kind of diatomite modified polyethylene foil, porous and hydrophilic diatom earth has higher permeability to aqueous vapor, the moisture-vapor transmission (WVTR) of modified film reaches 100-200g/m ².day, can get rid of the steam produced in packaging bag (freshness protection package) in time, reduce relative humidity in freshness protection package, anti-bacteria grows.

Wherein OTR, CO of function film 1 (AM film) ₂tR numerical value is at 2000-5000ml/m ².day.atm, between, relative HCOfilms, the AMfilms contribution to oxygen flow and saturating carbon dioxide can be ignored; The WVTR of AMfilms is lower than 10g/m ².day, also can ignore the contribution of steam breathability relative to HMfilms, AMfilms; Namely when Integrated design, AMfilms only contributes bactericidal property, and can ignore the contribution of Gas permeability.

The utility model function film 1 preferably adopts application number 200910086775.4 and 201210365158.X any film disclosed.

Wherein 200910086775.4 comprise: (a) internal layer, are controlled release layer, have and have a certain proportion of plastic of poly vinyl acetate copolymer-Low Density Polyethylene blending resin formation; B () middle level is the generating layer of bactericidal agent, have adhesive agent and described bactericidal agent precursor to form; C () is outer, for barrier layer and/or the printed layers of sulphur dioxide, the nonpolar film be made up of the material be selected from following composition: the blending and modifying resin film of Low Density Polyethylene or Low Density Polyethylene and linear low density polyethylene, high density polyethylene (HDPE), medium density polyethylene, or Biaxially oriented polypropylene; Alternatively, (d) first extra play, described first extra play is as between the outer field inside of printed layers and the outside as bactericidal agent generating layer middle level, and the first extra play is selected from nylon film, pet film.

201210365158.X comprise three layers, skin is high-obstruction; Interlayer is adhesive layer, is a dry glued membrane; Internal layer is food contact layer; Skin is KBOPP, VMCPP, VMPET, SiOx/PET, Al with high oxygen barrier ₂o ₃the Obstruct membrane of one or more compositions in/PET; Interlayer is that the mixing of one or more in organic acid or organic acid sodium salt is as active antibacterial composition, they are added in polyurethane or acrylate adhesives, active antibacterial composition mass percentage is in the intermediate layer 2-15%, and the consumption of the dry glue of adhesive agent is 3-7 gram/square meter; Internal layer is the LDPE modified resin of EVA modification, and EVA accounts for the 5-50% of internal layer total mass; Organic acid is the mixing of one or more in citric acid, sorbic acid, malic acid, tartaric acid, benzoic acid.

OTR, CO of function film 2 (EA film) ₂tR numerical value is also at 2000-5000ml/m ².day.atm between, and WVTR is lower than 10g/m ².day, when Integrated design, EAfilms only contributes ethylene absorption performance, and can ignore the contribution of Gas permeability.

The utility model function film 2 (EA film) preferably has the fruit-preserving green packing material of ethylene adsorption function disclosed in ZL201010522442.4, comprise following component: 100-90 mass fraction polyethylene or acrylic resin and 0.5-10 mass fraction al silicate molecular sieve, al silicate molecular sieve granularity is 5 ~ 100 microns, and silica alumina ratio is 5 ~ 100; Its preparation method, comprises the following steps: at room temperature, is added to by boehmite in water, is uniformly mixed; Then template and silicasol is added, until form gel; Gel is loaded in stainless steel autoclave, be airtightly heated to 200 ~ 250 DEG C, under pressure itself, carry out thermostatic crystallization 48 hours; After crystallization is complete, spend deionized water and drying; Finally in 500 ~ 700 DEG C of roastings 4 ~ 6 hours to remove template completely, be crushed to the grain warp of 5 ~ 100 microns, namely obtain molecular screen primary powder, the Si/Al mol ratio in molecular sieve is 5-100; After the polyethylene of 100 ~ 90 parts or acrylic resin resin and 0.5 ~ 10 part of molecular sieve Homogeneous phase mixing, melt blending on the twin screw extruder, is then blow molded into film.

The situation of function film 3 (MR film) is also similar to EAfilms, AMfilms, and when Integrated design, MRfilms only discharges 1-MCP, contribution ethene inhibit feature, and can ignore the contribution of Gas permeability.

The utility model function film 3 (MR film) is a kind of Fresh-Keeping Packaging Materials discharging 1-methyl cyclopropene disclosed in CN102862361A preferably, these packing are multi-layer compound film, comprise the Co ntrolled release layer that outermost layer is barrier layer, interlayer bond or 1-MCP releasing layer to 1-MCP gas, innermost layer is food contact layer or 1-MCP; Skin is 1-MCP barrier layer, based on one or more in Low Density Polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE) (HDPE), or based on polypropylene film BOPP (bidirectional stretching polypropylene film), CPP (prolonging polypropylene film), or based on above-mentioned polyethylene and acrylic resin, in main body, add the conducts such as the film that EVA (ethylene-vinyl acetate copolymer) is modifier outer; Using EVA modified PE-rubber blend as internal layer; Using 1-methyl cyclopropene (1-MCP) as active component, 1-MCP/ cyclodextrin is added to the drying adhesive layer that obtains in conventional polyurethane or acrylate adhesives as interlayer, 1-MCP/ cyclodextrin is that 1-MCP to be adsorbed on cyclodextrin carrier and 1-MCP mass content 3-5%, outer field polarity is higher than the polarity of internal layer, and outer field barrier is higher than the barrier of internal layer.

OTR, CO of function film 4 (HCO film) ₂tR numerical value is 10 ⁵-10 ⁶ml/m ².day.atm between, Main Function is for freshness protection package provides oxygen, discharges the carbon dioxide in freshness protection package; The WVTR of HCOfilms is lower than 20g/m ².day, when Integrated design, the contribution of HCOfilms to water vapo(u)r transmission energy can be ignored, and only considers the contribution to oxygen and COZ permeability.

Function film 4 (HCO film) preferably adopts membraneous material disclosed in 201210363822.7, there is single layer structure, with Low Density Polyethylene (LDPE), linear low density polyethylene (LLDPE), one or more in high density polyethylene (HDPE) (HDPE) are matrix resin, with the film of blowing after amorphous polymer melt blending, amorphous polymer is styrene-butadiene block copolymer (SBS), ethylene propylene diene rubber (EPDM), ethylene-octene copolymer (POE), poly-butadiene (PB), natural rubber (NR), one or more in ethylene-vinyl acetate (EVA), the toatl proportion of amorphous polymer in system is 25-30%.

OTR, CO of function film 5 (HM film) ₂tR numerical value is 10 ⁴ml/m ².day.atm left and right, relative to HCOfilms, less to the contribution of oxygen and COZ permeability, generally also can ignore; The WVTR of HMfilms is at 100-200g/m ².day, between, when Integrated design, HMfilms only considers the contribution to water vapo(u)r transmission, and can ignore the contribution of carbon dioxide and oxygen permeability.

Function film 5 (HM film) preferably adopts the fruit fresh-keeping packaging material disclosed in 201010532453.0 with high air permeability, the raw material of this material comprises diatom earth and the LDPE of modification, and the diatom earth of modification is the diatom earth that surface superscribes one deck polyvinyl acetate, polyacrylic resin or their copolymer; The method of diatomite modified: diatom earth is dispersed in water, then vinyl acetate is added or/and acrylic monomer, be warmed up to 40-60 DEG C, add the hydrogen peroxide that concentration is 30%, then the ferrous chloride aqueous solution of mass concentration 10% is added, react 4 ~ 10 hours, then dry, pulverize and obtain modification infusorial earth; Wherein above-mentioned 100 grams of diatom earth correspondence is dispersed in the water of 500ml, and then correspondence adds 5 ~ 200ml monomer, hydrogen peroxide addition correspondence 0.5 ~ 5ml, and ferrous chloride aqueous solution correspondence adds 0.2 ~ 2ml; Aforesaid propylene acrylic monomer is methacrylate monomer or methyl methacrylate monomer.

According to by the kind of fruit and vegetable preservation, select to need integrated function quantity, kind; According to the respiratory rate under the weight of fruits and vegetables, preservation temperature, calculate the area of each function film.

Generally, the HCO film of function film 4 and the HM film of function film 5 are that to design often kind of freshness protection package essential, HCO film provides suitable oxygen concentration and gas concentration lwevel for freshness protection package, HM film then gets rid of moisture in freshness protection package in time, prevent from condensing inside freshness protection package, reduce the probability growing pathogen; If climacteric type fruit, then EA film or MR film are the function films being necessary to add, and can sponge fruit in time and breathe the ethene produced, delay and climacteric of delaying; As fruit and vegetable easily grows fungi or other pathogen, then in freshness protection package design, add bacteria resistance function AM film.

If the fruit of W kilogram needs the freshness protection package that a profile height is H rice, width is D rice fresh-keeping, preservation temperature is T, and at such a temperature, the respiratory rate of fruit is for producing RmlCO ₂/ (kg.hr) or consumption RmlO ₂/ (kg.hr), the respiratory rate of fruit is existing or known at certain temperature; After in freshness protection package, gas concentration reaches balance, the balance concentration of volume percent of each component is respectively C _o2, C _cO2, relative humidity is RH, in outside air, the concentration of volume percent of oxygen is 20%, and gas concentration lwevel is zero, and outside air relative humidity is RH ₀, then there is following relationship:

The oxidizing reaction of glucose:

C ₆h ₁₂o ₆+ 6O ₂=6CO ₂+ 6H ₂o+ heat (1)

According to formula (1), can derive, if loading Wkg, respiratory rate are RmlCO in freshness protection package ₂/ (kghr) (or RmlO ₂/ (kghr)) fruits and vegetables, because the steam quality (g) of respiration generation per hour is:

H ₂O(g/hr)＝W×R×18/(22.4×1000)(2)

In freshness protection package, in gas and external environment, gas has lower column balancing:

Oxygen equilibrium: W × R=OTR _hCO× H × di _hCO× (20%-C _o2) × 24hr (3)

Carbon dioxide balance: W × R=CO ₂tR _hCO× H × di _hCO× (C _cO2-0) × 24hr (4)

The balance of aqueous vapor:

W×R×18/(22.4×1000)×24hr＝WVTR×H×di _HM×(RH-RH ₀)(5)

Above-mentioned W-fruit weight, kg; The respiratory rate of R-fruit, ml/ (kghr); OTR _hCOthe OTR oxygen transmission rate of-function film 4 (HCO film), ml/m ²24hr.atm; CO ₂tR _hCOthe carbon dioxide transmitance of-function film 4 (HCO film), ml/m ²dayatm; C _o2after-gas reaches balance, the volumn concentration of oxygen in freshness protection package, %; C _cO2after-gas reaches balance, the volumn concentration of carbon dioxide in freshness protection package, %; H-bag is high, m; Di _hCOthe width of function film 4 in-sack, according to formula (3) and (4), gets the higher value in both, m; Di _hMthe width of function film 5 in-sack, m; The moisture-vapor transmission of WVTR-function film 5, g/m ²24hr100%RH; After RH-gas reaches balance, relative humidity in freshness protection package, unit is %; RH ₀the relative humidity of-outside air, unit %; C _cO2, C _o2generally get the atmosphere composition of fruit and vegetable preservation the best, can obtain according to Literature Consult, or oneself record according to fresh-keeping test.WVTR is the moisture-vapor transmission of HM.

According to formula (3) and (4), can draw when after gas composition balance in freshness protection package, when reaching optimum oxygen or gas concentration lwevel, prepare multifunctional unit freshness protection package needs highly for the HCO thin-film width of H is di _hCO, why) generally get a larger value (is not determined value; Can show that (RH is less than 100% when realizing not condensing inside freshness protection package according to formula (5), in general freshness protection package, relative humidity gets 95%-100%), outside air relative humidity is a changing value, generally get the average relative humidity RH on this season, the same day, the HM thin-film width di of needs _hM.

Freshness protection package total surface area is D × H formula (3) square meter, obtains di according to formula (3) and (4) _hCO(i.e. the area of HCO film), obtains the area of HM film according to formula (5), after determining these two kinds of film usable floor areas, and the remaining area of freshness protection package (D × H-H (di _hCO+ di _hM)) can the concentration level of ethene be discharged according to fruits and vegetables and easily grow the degree of pathogen and determine the area of ethene suppression, ethylene absorption, bacteriostatic film.

As fruit and vegetable non-respiratory transition type, or respiration does not generate ethene substantially, then can use three function i ntegration designs, not use ethylene absorption function, only use HCO, HM and AM tri-function; As very high in fruit and vegetable respiration generation ethylene concentration, then adopt the integrated freshness protection package design of five-function, namely in above-mentioned four function fresh-keeping bag design basiss, increase and use MR film (ethene suppression) function film.

Breed bacteria as unsuitable in fruit and vegetable, and respiration does not produce ethene, then adopt two function i ntegration designs, only adopt HCO and HM film; In this case, if the size of freshness protection package is comparatively large, and after calculating, find that the area summation of HCO film and the HM film needed is less than H × D, then can increase HM film size.

If find after calculating that required multi-function membrane area summation is greater than H × D, then need to prepare the higher HCO film of permeability to air, HM film, also need the permeability to air increasing AM and EA film if desired.

Bag-making method

Required several function film coiled materials are cut into required width (di), then corresponding coiled material (shown in Fig. 2) is made by the mode of heat-sealing or adhesives bonding, then on automatic bag-mfg. machine, seal or be bonded into the freshness protection package of Lilezhen form, the height of sack is H.

Fresh-keeping application

Multifunctional unit freshness protection package be particularly suitable for respiratory intensity high, breathe and generate the more preserving fruit and vegetable utilizing of ethene, be particularly suitable for the fresh-keeping of climacteric type fruits and vegetables, be particularly suitable for the fresh-keeping of fruits and vegetables under normal temperature.Select the fruits and vegetables of the infection pathogen that has no mechanical damage, do not have, directly put into multifunctional unit freshness protection package, tighten sack, freshness protection package is preferably placed on the ventilative dividing plate in bottom, allow the film at each position of freshness protection package all play permeation functions, on the downside of the freshness protection package of transference pallet contact, film normally plays a role.

Matrimony vine has the pulp of pulpous state, and skin is thin, and easily damaged, its commodity are generally dry wolfberry forms; The fresh matrimony vine of firm harvesting, within second day, decayed fruit rate can to more than 10%, and within the 3rd day, decayed fruit rate reaches 30%, within the 4th day, reaches about 50%.Because the fresh-keeping problem of fresh fructus lycii is never resolved, fresh fructus lycii is caused at source to sell.Multifunctional unit freshness protection package is utilized successfully to solve the fresh-keeping problem of fresh matrimony vine.

Accompanying drawing explanation

The integrated freshness protection package design diagram of Fig. 1 five-function.

1, ethene inhibit feature, 2, carbon dioxide selects airing function, 3, high steam through function, 4, high oxygen flow function, 5, bacteria resistance function, 6, sack, 7, lower sealing.

Fig. 2 multifunctional unit preservative film coiled material schematic diagram.

1, function 1,2, function 2,3, function 3,4, function 4,5, function 5.

Detailed description of the invention

Below in conjunction with embodiment the utility model done and illustrate furtherly, but the utility model is not limited to following examples.

Embodiment 1

The HM film of a slice 0.3m × 0.25m and the AM film of same size, as upper and lower two panels, be prepared into two function i ntegration freshness protection packages, load 80 (about 40 grams) fresh grain matrimony vines, two function i ntegration freshness protection packages are placed on ventilative dividing plate, observe under 25 DEG C of room temperatures by sealing.

Comparative example 1:

80 fresh matrimony vines of same quality are placed in polypropylene (PP) plastic casing, and plastic casing oad is 10cm × 10cm × 8cm, all punches in lid, side, downside, aperture 5mm, altogether 20 holes, observe Decay.Detect head space atmosphere in two function i ntegration freshness protection packages after four days and add up decayed fruit rate.The results are shown in Table shown in 1.

Observe two function i ntegration freshness protection packages, water smoke is not there is inside freshness protection package in 1-4 days, decayed fruit rate only 15% after 4 days, find that in freshness protection package, oxygen concentration is stabilized in 12.5% by analyzing, gas concentration lwevel 5.8%, illustrates that HM/AM bis-function i ntegration freshness protection package obviously can reduce fresh fructus lycii and breathe, delays matrimony vine maturation, aging, rots, compared with control group decayed fruit rate 45%, decayed fruit rate is reduced to 1/3.

Embodiment 2

The AM film of 0.1m × 0.25m and the HCO film sealing of 0.2m × 0.25m are spliced into the size of 0.3m × 0.25m, make AM/HCO integrated thin-film, with the HM film of other a slice 0.3m × 0.25m as upper and lower two panels, be prepared into three function i ntegration freshness protection package AM/HCO/HM, load 200 (about 100 grams) fresh grain matrimony vines, three function i ntegration freshness protection packages are placed on the ventilative dividing plate in lower end, observe under 25 degree of room temperatures by sealing;

Comparative example 2

200 fresh matrimony vines of same quality are placed in polypropylene (PP) plastic casing, and plastic casing oad and punching situation, with comparative example 1, observe matrimony vine Decay.Detect head space atmosphere in three function i ntegration freshness protection packages after four days and add up decayed fruit rate.

Observe AM/HCO/HM tri-function i ntegration freshness protection package, water smoke is not there is inside freshness protection package in 1-4 days, decayed fruit rate only 10% after 4 days, find that in freshness protection package, oxygen concentration is stabilized in 15.5% through analysis, gas concentration lwevel 0.4%, illustrates that namely AM/HCO/HM tri-function fresh-keeping bag obviously can reduce fresh fructus lycii and breathe, delays matrimony vine maturation, aging, appear matrimony vine in time and breathe the carbon dioxide produced, prevent that carbon dioxide is too high to be damaged matrimony vine; Compared with control group decayed fruit rate 50%, the decayed fruit rate of three function i ntegration freshness protection packages is reduced to 1/5 of control group.

Embodiment 3

The AM film of 1 0.15m × 0.25m is become a slice film (AM/HCO film) of the size of 0.3m × 0.25m with the HCO film sealing of 1 0.15m × 0.25m; By a slice film (MR/HM film) of the size of the MR film sealing 0.3m × 0.25m of the HM film of 1 0.15m × 0.25m and 1 0.15m × 0.25m; Using 1 AM/HCO film preparing above and 1 MR/HM film as upper and lower two panels, be prepared into four function i ntegration freshness protection package AM/HCO/HM/MR, load 200 fresh matrimony vines, sealing, four function i ntegration freshness protection packages are placed on the ventilative dividing plate in lower end, observe under 25 degree of room temperatures;

Comparative example 3

200 fresh matrimony vines of same quality are placed in polypropylene (PP) plastic casing, and plastic casing oad and punching situation, with comparative example 1, observe matrimony vine Decay.Detect head space atmosphere in three function i ntegration freshness protection packages after four days and add up decayed fruit rate.

Observe AM/HCO/HM/MR tetra-function i ntegration freshness protection package, water smoke is not there is inside freshness protection package in 1-4 days, decayed fruit rate only 5% after 4 days, find that in freshness protection package, oxygen concentration is stabilized in 13.5% through analysis, gas concentration lwevel 1.4%, illustrate that namely AM/HCO/HM/MR tetra-function i ntegration freshness protection package obviously can reduce fresh fructus lycii and breathe, delay matrimony vine maturation, old and feeble, have and can appear the carbon dioxide that matrimony vine breathes generation in time, matrimony vine also obviously can be suppressed in addition to produce ethene, add antibacterial function, this four functions and one-tenth freshness protection package are compared with control group decayed fruit rate 50%, decayed fruit rate is reduced to 1/10.

This multifunctional unit freshness protection package is ingenious solves multi-functional integration problem, the existing freshness protection package design avoided is too complicated, MULTILAYER COMPOSITE is on problems such as the impacts of permeability to air, as required can integrated more function, but the function film needing permeability to air larger is as material film.Those skilled in the art should understand, above preferred embodiment just illustrates of the present utility model, does not form restriction of the present utility model.Can carry out multiple improvement, combination, sub-combination and conversion to it as required, all improvement, combination, sub-combination, conversion and equivalence are replaced and are all fallen within the scope of appended claim.

Claims (8)

1. multifunctional unit freshness protection package, is characterized in that, the integrated freshness protection package of several functions be in following 5 kinds of materials at least two kinds be spliced:

Function film AM film (1): the multi-layer compound film with intelligent slow-release bactericide function;

Function film EA film (2): the fruit freshness preserving packing film with ethylene adsorption function;

Function film MR film (3): the laminated film with 1-MCP release function;

Function film HCO film (4): a kind of film with high oxygen permeability and high carbon dioxide selection permeability to air;

Function film HM film (5), a kind of diatomite modified polyethylene foil, the moisture-vapor transmission WVTR of modified film reaches 100-200g/m ².day.

2. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, function film 1 adopts following film;

Wherein film, comprising: (a) internal layer, is controlled release layer; B () middle level is the generating layer of bactericidal agent; C () is outer, be barrier layer and/or the printed layers of sulphur dioxide; D () first extra play, described first extra play is as between the outer field inside of printed layers and the outside as bactericidal agent generating layer middle level.

3. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, function film AM film (1) adopts following film;

Film comprises three layers, and skin is high-obstruction; Interlayer is adhesive layer, is a dry glued membrane; Internal layer is food contact layer.

4. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, function film MR film (3) is a kind of Fresh-Keeping Packaging Materials discharging 1-methyl cyclopropene, these packing are multi-layer compound film, comprise the Co ntrolled release layer that outermost layer is barrier layer, interlayer bond or 1-MCP releasing layer to 1-MCP gas, innermost layer is food contact layer or 1-MCP.

5. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, OTR, CO of function film HCO film (4) ₂tR numerical value is 10 ⁵-10 ⁶ml/m ².day.atm, between, the WVTR of function film HCO film (4) is lower than 20g/m ².day.

6. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, function film HCO film (4) has single layer structure.

7. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, function film HM film (5) is for having the fruit fresh-keeping packaging material of high air permeability.

8. according to multifunctional unit freshness protection package according to claim 1, it is characterized in that, at least comprise function film HCO film (4) and function film HM film (5).