CN106005710A - High-performance barrier film packaging bag and method for packaging and storing new-made steam-flaked grains - Google Patents
High-performance barrier film packaging bag and method for packaging and storing new-made steam-flaked grains Download PDFInfo
- Publication number
- CN106005710A CN106005710A CN201610510921.1A CN201610510921A CN106005710A CN 106005710 A CN106005710 A CN 106005710A CN 201610510921 A CN201610510921 A CN 201610510921A CN 106005710 A CN106005710 A CN 106005710A
- Authority
- CN
- China
- Prior art keywords
- resin
- packaging bag
- steam
- separation film
- corn
- 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.)
- Pending
Links
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- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 96
- 235000005822 corn Nutrition 0.000 claims description 96
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- 239000005033 polyvinylidene chloride Substances 0.000 claims description 3
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims description 3
- 150000008065 acid anhydrides Chemical class 0.000 claims description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
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- QRARGUIFAGCOOA-UHFFFAOYSA-N aspertoxin Chemical compound O1C2=C(C3(C=COC3O3)O)C3=CC(OC)=C2C(=O)C2=C1C=CC=C2OC QRARGUIFAGCOOA-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
- B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
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Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Wrappers (AREA)
- Packages (AREA)
Abstract
The invention provides a high-performance barrier film packaging bag and a method for packaging and storing new-made steam-flaked grains. The storage method comprises the following steps: step 1, preparing moist-steam high-temperature flaked grain flakes with moisture content being 18-22% and a temperature being 98-110 DEG C by a steam-flaking process; step 2, air-cooling and cooling the moist-steam high-temperature flaked grain flakes prepared in the step 1 to a temperature being 45-55 DEG C, thereby obtaining moist-steam flaked grain flakes with a relatively high temperature; and step 3, adding the moist-steam flaked grain flakes with the relatively high temperature prepared in the step 2 into the high-performance barrier film packaging bag, and storing after thermally sealing. The method has the advantages that: storage life of the new-made steam-flaked grains is effectively prolonged in case of guaranteeing that the steam-flaked grains do not generate mildew, defects, in aspect of economic benefits, using effects and the like of processing and storage processes such as hot-air drying, vacuum packaging, micro-storage and a chemical mildew preventive are avoided, and conditions are provided for popularizing and applying a grain steam-flaking technology.
Description
Technical field
The invention belongs to feed manufacturing and storing technology field, be specifically related to a kind of high-performance separation film packaging bag and
The method of brand-new steam-flaked corn packing and storing.
Background technology
It is introduced into into me as a kind of processing mode that can significantly improve corn utilization ratio from steam-flaked technology
Since state, steam-flaked corn large-scale application already in animal feeding, especially ruminant feeding process
In.
Steam-flaked corn be mainly by the large-scale production of Feed Manufacturing producer after, then distribution to raise enterprise or
Peasant household.The moisture of the steam-flaked corn of brand-new is higher, generally 18～22%, directly stores or fortune
Defeated easily go mouldy.And the mycete in the steam-flaked corn gone mouldy can produce in growth and breeding metabolic process
The multiple harmful toxins such as SHENGHUANG aspertoxin, can have a strong impact on the quality of livestock products, even prestige after domestic animal is edible
The side of body, to the health and lives of animal, ultimately causes the waste of resource and huge economic loss.
Therefore, for solving the problem that brand-new steam-flaked corn easily goes mouldy, in prior art, feed factory
Generally the moist steam tabletting corn of brand-new is carried out hot air drying process so that it is moisture is down to safe moisture
(14%) below, then to it store or transport.
But, hot air drying processes brand-new steam-flaked corn, is primarily present following deficiency:
(1) hot-air drying process needs to consume substantial amounts of energy, its cost account for product market price 2～
4%, increase the weight of corn cost；It addition, also there is uneconomical environmental protection, problem that energy consumption is high；
(2) south high humidity environment under, air-dry the steam-flaked corn the most easily moisture absorption and go mouldy, make
Become heavy losses, which also limits the promotion and application of the steam-flaked technology of corn.
Summary of the invention
The defect existed for prior art, the present invention provides a kind of high-performance separation film packaging bag and brand-new to steam
The method of vapour pressure sheet corn packing and storing, can effectively solve the problems referred to above.
The technical solution used in the present invention is as follows:
An object of the present disclosure is to provide a kind of high-performance separation film packaging bag, and described high-performance separation film is packed
The material that bag uses is high-performance separation film, and described high-performance separation film is multi-layer film structure, including n-layer EVOH
Resin bed and m layer additional functionality resin bed；Wherein, n and m is natural number；Each EVOH resin bed
And each additional functionality resin bed carry out the stacking of any order after use laminating technology, i.e. prepare
Final high-performance separation film.
Preferably, described EVOH resin is based on ethylene unit unit and vinyl alcohol construction unit, and comprises
If the non-saponified ethylene ester structure unit of dry measure residual；Wherein, in described EVOH resin, ethylene unit unit
Content be 20～60 moles of %, preferably 25～50 moles %, particularly preferably 25～35 moles %；
In described EVOH resin, the saponification degree of vinyl acetate composition is 90～100 moles of %, preferably 95～100
Mole %, particularly preferably 99～99.9 moles %；
Melt flow rate (MFR) MFR of described EVOH resin, at 210 DEG C, load 2, measures under 160g, for
0.5～100g/10 divides, and preferably 1～50g/10 divides, and particularly preferably 3～35g/10 divide；
The thickness of described EVOH resin bed is 0.5～30 μm, preferably 0.8～20 μm, particularly preferably
1～10 μm；
Described additional functionality resin bed is thermoplastic resin；The thickness of described additional functionality resin bed is
1～200 μm, preferably 2～100 μm.
Preferably, the material of described thermoplastic resin is: polythylene resin, polypropylene-based resin, poly-
Olefine kind resin, polyester resin, polyamide-based resin, Corvic, polyvinylidene chloride resin,
Acrylic resin, polystyrene resin, vinyl ester resins, polyester elastomer, polyurethane elastomer,
Chlorinated polyethylene resin, chlorinated polypropylene, aromatic series or aliphatic poly ketone resin and the most all kinds of
The polyalcohols of resin reduction.
Preferably, described polythylene resin includes linear low density polyethylene resin, Low Density Polyethylene tree
Fat, ultra-low density polyethylene resin, medium density polyethylene resin, high-density polyethylene resin and ethylene-α-alkene
Hydrocarbon copolymer resin；Wherein, in ethene-alpha-olefin copolymer resin, alkene is the α-alkene of carbon number 4～20
Hydrocarbon；
Described polypropylene-based resin includes acrylic resin and propylene-alpha-olefin copolymers resin；Wherein, propylene-α-
In olefin copolymer resin, alkene is the alpha-olefin of carbon number 4～20；
Described polyolefin resin include ethylene-vinyl acetate copolymer, ethylene-vinyl acetate ionomer,
Ethylene-propylene copolymer, ethylene-acrylic acid copolymer, vinyl-acrylate copolymer, polybutylene homopolymer
Or copolymer, polypenthylene homopolymer or copolymer or the homopolymer of above-mentioned alkene or copolymer are through unsaturation
The polyolefin resin of the broad sense of carboxylic acid or carboxylate graft modification.
Preferably, described additional functionality resin bed is hydrophobic thermoplastic's resin bed；Described hydrophobic thermoplastic
Property resin bed is preferably polyolefin type resin layer；Described polyolefin type resin layer is preferably polythylene resin layer
With polypropylene-based resin layer；
The order that stacks of each EVOH resin bed and each additional functionality resin bed is: EVOH resin bed
For intermediate layer, stack respectively above and below EVOH resin bed and additional functionality resin bed is set.
Preferably, each EVOH resin bed and each additional functionality resin bed carry out stacking of any order
After, sandwiched bonding resin layer between two adjacent resin beds；The thickness of described bonding resin layer is
0.1～30 μm, preferably 0.2～10 μm；Carry out laminating technology the most again.
Preferably, described bonding resin layer is: by additive reaction or graft reaction make unsaturated carboxylic acid or
Its anhydride and olefin polymer chemical bonding and the modified olefin base polymer with carboxyl that obtains；Wherein,
The olefin polymer used is polyolefin resin, including modified poly ethylene, modified polypropene, modification
Ethylene-propylene copolymer, ethene improved-ethyl acrylate copolymer and ethene improved-vinyl acetate co-polymer；
The unsaturated acid anhydride used is maleic anhydride；The unsaturated carboxylic acid that contains in described bonding resin layer or
Its anhydride amount is 0.001～3 weight %, preferably 0.01～1 weight %, particularly preferably 0.03～0.5 weight %.
The present invention the second purpose is to provide a kind of applies above-mentioned high-performance separation film packaging bag to brand-new vapour pressure
Sheet corn carries out the method for packing and storing, comprises the following steps:
Step 1, by steam-flaked method prepare moisture be 18～22%, temperature be 98～110 DEG C
Moist steam high temperature tabletting corn sheet；
Step 2, the moist steam high temperature tabletting corn sheet wind cooling temperature lowering that step 1 is prepared to 45～55 DEG C,
Obtain moist steam higher temperatures tabletting corn sheet；
Step 3, moist steam higher temperatures tabletting corn sheet step 2 prepared is encased in claim 1-7 and appoints
In one described high-performance separation film packaging bag, store after sealing；
Wherein, described high-performance separation film has that barrier properties for gases, expansion and contraction and steam are unidirectional to be passed through
Property；Initial stage after moist steam higher temperatures tabletting corn sheet being encased in high-performance separation film packaging bag and seals,
On the one hand, due to the unidirectional permeability of the steam of packaging bag, moist steam higher temperatures tabletting corn sheet is volatilized
Steam evaporate in external environment condition through packaging bag, and due to the barrier properties for gases of packaging bag, outside gas
Body cannot be introduced into inside packaging bag, so that forming negative pressure in packaging bag, and trends towards forming oxygen-free environment；
On the other hand, owing to packaging bag has expansion and contraction, therefore, cold when moist steam higher temperatures tabletting corn sheet
But, after arriving the process of room temperature, packaging bag cooling is also constantly shunk, on the one hand, packaging bag can evict out of when shrinking
Gas in packaging bag, forms oxygen-free environment；On the other hand, when packaging bag is shunk, can tightly compacted pack
Tabletting corn sheet in Dai, forms good sealing effectiveness；Ultimately form the packaging of good sealing effect and anaerobic
Closed environment in bag；
During the storage of tabletting corn sheet, due to the barrier properties for gases of packaging bag, extraneous gas cannot enter
Enter inside packaging bag, make long term maintenance oxygen-free environment in packaging bag；And due to the tabletting corn in packaging bag
Sheet is normal temperature storage, no longer produces water vapour, and therefore, the water content maintenance of tabletting corn sheet is basically unchanged
State.
Preferably, step 1 particularly as follows:
In the modulator, to use steam pressure be 0.3～0.5Mpa, temperature is the high-temperature steam of 98～110 DEG C
Modulation corn, the modulation time is 45～100min；Then, the corn after modulation is pressed into thickness 0.5～
Thin slice between 1.5mm, i.e. obtains moist steam high temperature tabletting corn sheet.
Preferably, stored corn sheet is Semen Maydis, Sorghum vulgare Pers., Fructus Hordei Vulgaris, Herba bromi japonici, Oryza glutinosa or Semen Fagopyri Esculenti.
High-performance separation film packaging bag and the method for brand-new steam-flaked corn packing and storing that the present invention provides have
Have the advantage that
In the case of ensureing that steam-flaked corn does not goes mouldy, effectively extend brand-new steam-flaked corn
In the shelf life, it also avoid the processing such as hot air drying, vacuum packaging, microbial, chemical anti mildew agent and storage simultaneously
Deposit the technique defect at the aspect such as economic benefit, using effect, for the steam-flaked technology of corn popularization with should
With providing condition.
Accompanying drawing explanation
The schematic flow sheet of the method for the brand-new steam-flaked corn packing and storing that Fig. 1 provides for the present invention.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, with
Lower combination drawings and Examples, are further elaborated to the present invention.Should be appreciated that described herein
Specific embodiment only in order to explain the present invention, be not intended to limit the present invention.
It is an object of the invention to provide a kind of high-performance separation film packaging bag and the packaging storage of brand-new steam-flaked corn
The method deposited, with in the case of ensureing that steam-flaked corn does not goes mouldy, effectively extends brand-new vapour pressure
In the shelf life of sheet corn, it also avoid hot air drying, vacuum packaging, microbial, chemical anti mildew agent etc. simultaneously
Processing and storage process are in the defect of the aspect such as economic benefit, using effect, for the steam-flaked technology of corn
Promote and provide condition with application.
Main innovation of the present invention is: corn after steam regulation of texture, conditioning of texture, tabletting and wind cooling temperature lowering to specific temperature,
The packaging bag utilizing specific materials stores after carrying out heat sealed package.Wherein, carry out after corn drops to specified temp
Packing processes, the gas such as the oxygen that the pyrocondensation function that can make full use of packaging bag is driven in bag, maintain anaerobic close
Closed loop border.
The high-performance separation film packaging bag of present invention offer and the method for brand-new steam-flaked corn packing and storing,
The corn being suitable for can be all kinds of corn such as Semen Maydis, Sorghum vulgare Pers., Fructus Hordei Vulgaris, Herba bromi japonici, Oryza glutinosa or Semen Fagopyri Esculenti.
The high-performance separation film packaging bag that the present invention provides, the material of employing is high-performance separation film, high-performance
Obstruct membrane is multi-layer film structure, including n-layer EVOH resin bed and m layer additional functionality resin bed；Wherein,
N and m is natural number, specifically arranges the number of plies and every layer thickness sets the most flexibly；Each
EVOH resin bed and each additional functionality resin bed use laminating technology after carrying out the stacking of any order,
I.e. prepare final high-performance separation film.
(1) EVOH resin bed
EVOH resin bed belongs to the core layer of high-performance separation film packaging bag, primarily serves the purpose of barrier properties for gases.
The resin that EVOH resin uses ethylene and vinyl esters monomer copolymerization after saponification and obtains, this resin is non-aqueous
Dissolubility thermoplastic resin.From the economic viewpoint, above-mentioned vinyl esters monomer generally uses vinylacetate.
Polymerization can use any known polymerization, such as, polymerisation in solution, suspension polymerisation, emulsion polymerization,
Generally use the polymerisation in solution with methanol as solvent.The saponification of the ethylene-vinyl ester copolymer obtained can also be led to
Cross known method to carry out.That is, EVOH resin based on ethylene unit unit and vinyl alcohol construction unit, and
If comprising the non-saponified ethylene ester structure unit of dry measure residual.
The content of the ethylene unit unit in EVOH resin is based on the value measured by ISO14663, usually
20～60 moles of %, preferably 25～50 moles %, particularly preferably 25～35 moles %.It is as too low in this content,
Then deposit barrier properties for gases under high humidity conditions, the tendency of melt molding reduction, otherwise, such as this content
Too high, then there is the tendency that barrier properties for gases is not enough.
The saponification degree of the vinyl acetate composition in EVOH resin is that (wherein, EVOH resin is based on JIS K6726
The homogeneous solution being dissolved in water/methanol solvate) value that records, usually 90～100 moles of %, it is preferably
95～100 moles of %, particularly preferably 99～99.9 moles %.As this halogenation is spent low, then there is gas barrier
Property, the tendency of the reduction such as heat stability, moisture-proof.
It addition, use the melt flows speed of fusion index instrument (extrusion plastometer) this EVOH resin of recording
Rate (MFR) (210 DEG C, load 2,160g) is usually 0.5～100g/10 and divides, and preferably 1～50g/10 divides, especially
It is preferably 3～35g/10 to divide.As excessive in this MFR, then there is the tendency that masking is unstable, as too small,
Then there is viscosity and become too high, it is difficult to carry out the tendency of melt extruded.
The fusing point of EVOH resin is to use differential scanning calorimeter (DSC) with the warming and cooling rate of 10 DEG C/min
The value recorded, preferably 120～210 DEG C, is particularly preferably 140～200 DEG C by usually 100～220 DEG C.
(2) additional functionality resin bed
Additional functionality resin bed uses the thermoplastic resin in addition to EVOH resin, specifically may include that
Linear low density polyethylene, Low Density Polyethylene, ultra-low density polyethylene, medium density polyethylene, high density
The polythylene resins such as polyethylene, ethene-alpha-olefin (alpha-olefin of carbon number 4～20) copolymer, polypropylene,
Polypropylene-based resin, the ethylene-vinyl acetates such as propylene-alpha-olefin (alpha-olefin of carbon number 4～20) copolymer
Copolymer, ionomer, ethylene-propylene (block and random) copolymer, ethylene-acrylic acid copolymer, ethylene-
The homopolymer of the alkene such as acrylate copolymer, polybutene, polypenthylene or copolymer or these alkene
Homopolymer or copolymer are through the TPO of the broad sense such as material of unsaturated carboxylic acid or carboxylate graft modification
Resin；Polyester resin；Polyamide-based resin (also includes copolyamide)；Polrvinyl chloride；Poly-inclined two chloroethenes
Alkene；Acrylic resin；Polystyrene；Vinyl ester resins；Polyester elastomer；Polyurethane elastomer；
Chlorinated polyethylene；Chlorinated polypropylene；Aromatic series or aliphatic polyketone；And the reduction of above material is many
Unit's alcohols.
Wherein, in order to prevent the barrier properties for gases of EVOH resin from reducing, additional functionality resin is preferably used
Hydrophobic resin, specifically, additional functionality resin preferred polyolefm resinoid, particularly preferred polyethylene
Resinoid, polypropylene-based resin.
(3) bonding resin layer
In multilayer structure making, the number of plies of EVOH resin bed and additional functionality resin bed is one layer or one
More than Ceng.Stacking of any order is carried out at each EVOH resin bed and each additional functionality resin bed
After, can also sandwiched bonding resin layer between two adjacent resin beds；Carry out laminating technology the most again.
As bonding resin layer, include but not limited to: make unsaturation by additive reaction or graft reaction etc.
Carboxylic acid or its anhydride and olefin polymer (said polyolefins resinoid) chemical bonding and obtain there is carboxylic
The modified olefin base polymer of base.Specifically, it may be preferred to enumerate the one in following material or
Two or more mixture: modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, horse
Maleic anhydride grafted ethene improved-propylene (block and random) copolymer, modified by maleic acid anhydride graft ethylene-acrylic acid
Methacrylate copolymers, modified by maleic acid anhydride graft ethylene-vinyl acetate copolymer etc..Now, thermoplastic resin
In the unsaturated carboxylic acid that contains or its anhydride amount be usually 0.001～3 weight %, preferably 0.01～1 weight %,
Particularly preferably 0.03～0.5 weight %.As less in the modification amount in modifier, then there is cohesive insufficient
Tendency, otherwise, as more, then exist and cause cross-linking reaction, thus the tendency that mouldability is deteriorated.
(4) laminating technology and multiple structure
By the EVOH resin bed of barrier properties for gases of the present invention and additional functionality resin bed and/or binder resin
When layer is laminated, as laminating method, from the viewpoint of cost and environmental protection, preferably co-extrusion platen press.
As co-extrusion platen press, specifically can make with the following method: multi-manifold die (multimanifold die) method,
Material feeding block (feed block) method, many slit die (multislot die) method, die head outer Method for bonding, inflation (inflation)
Method etc..For die shape, it is possible to use T-shaped die head, circle die head etc..Being melt into during melt extruded
Type temperature is not particularly limited, usually 150～300 DEG C.
High-performance separation film is multiple structure, EVOH resin contains layer and is designated as a (a1, a2), auxiliary
Help functional resin to contain layer and be designated as b (b1, b2).
Then: can be b/a/b, a/b/a, a1/a2/b, a/b1/b2, b2/b1/a/b1/b2, b2/b1/a/b1/a/b1/b2
Etc. combination in any.
It addition, the material-returning layer as will be at least made up of the mixture of EVOH resin and additional functionality resin is made
For R, then can be to make the forms such as b/R/a, b/R/a/b, b/R/a/R/b, b/a/R/a/b, b/R/a/R/a/R/b.
It should be noted that in above-mentioned layer is constituted, resin of binding property can be arranged at each interlayer as required
Layer, as this resin of binding property, different according to the difference of additional functionality resin b kind, therefore, suitable
When selecting, as representative, can enumerate: make unsaturated carboxylic by additive reaction or graft reaction etc.
Acid or its anhydride and polyolefin resin chemical bonding and the modified olefin Type of Collective with carboxyl that obtains
Thing.
The additional functionality resin bed of multilayer film and the thickness of resin of binding property layer are constituted according to layer, miscellaneous function
The property kind of resin, the kind of resin of binding property, purposes and packaged form, requirement physical property etc. difference and
Difference, therefore cannot treat different things as the same.But additional functionality resin bed is usually 1～200 μm, it is preferably
2～100 μm, resin of binding property layer is 0.1～30 μm, about preferably 0.2～10 μm.EVOH resin contains
The thickness barrier properties for gases as requested of layer etc. and different, but usually 0.5～30 μm, preferably
0.8～20 μm, particularly preferably 1～10 μm, as too low in this thickness, then exist and can not obtain abundant gas barrier
Property tendency, otherwise, as blocked up, then there is the tendency that the flexibility of film is not enough.
The several embodiments of high-performance separation film packaging bag are set forth below:
Embodiment one is prepared in high-performance separation film packaging bag:
(1) high-performance separation film is five-layer structure, be followed successively by order LDPE layer, tie layer, evoh layer,
Tie layer, LDPE layer；
Wherein, LDPE layer refers to: low density polyethylene layer, for additional functionality resin bed；
Tie layer refers to: the bonding resin layer of modified by maleic acid anhydride graft polyethylene；
Evoh layer refers to: 44 moles of % of ethylene contents, MFR3.5, the EVOH of 99.7 moles of % of saponification degree
Resin bed.
Each layer thickness ratio is:
LDPE/tie/EVOH/tie/LDPE=24/12/8/12/24um, total80um
(2) use five kind of five stratotype upwards air-cooled type blow molding machine, rolled over by film blowing molding
Folded width is the laminated film of 300mm, and this laminated film has layer composition and thickness is
The Rotating fields of LDPE/tie/EVOH/tie/LDPE=24/12/8/12/24um, total80um.
Now, the laminated film obtained two panels diaphragm is made, by two panels in the way of LDPE layer adjoins each other
Film lamination, uses impulse sealer (FUJI IMPULSE company (strain) system, FA-300-10 model) by it
Three limit heat-sealings, thus make sack.
Embodiment two is prepared in high-performance separation film packaging bag:
(1) high-performance separation film is three-decker, be followed successively by order the 1st additional functionality resin bed,
Evoh layer, the 2nd additional functionality resin bed；
Wherein, the 1st additional functionality resin bed refers to: polyamide-based resin layer；
2nd additional functionality resin bed refers to: polyester elastomer layer；
Evoh layer refers to: 20 moles of % of ethylene contents, MFR0.3, the EVOH of 99.9 moles of % of saponification degree
Resin bed.
(2) use air-cooled type blow molding machine, be 300mm by film blowing molding folding width
Laminated film, this laminated film have layer constitute and thickness be: the 1st additional functionality resin bed/evoh layer/
The Rotating fields of the 2nd additional functionality resin bed /=2/30/200um, total232um.
Then, use impulse sealer (FUJI IMPULSE company (strain) system, FA-300-10 model) by it
Three limit heat-sealings, sealing machine uses parameter to be AC220V, 60HZ, 100-130W, 1 second, thus makes bag
Son.
Embodiment three is prepared in high-performance separation film packaging bag:
(1) high-performance separation film is five-layer structure, be followed successively by order the 1st additional functionality resin bed b1,
2nd additional functionality resin bed b2, evoh layer, the 2nd additional functionality resin bed b2 and the 1st auxiliary merit
Can property resin bed b1；
Wherein, the 1st additional functionality resin bed b1 refers to: ethylene-vinyl acetate copolymer；
2nd additional functionality resin bed b2 refers to: polyvinylidene chloride；
Evoh layer refers to: 35 moles of % of ethylene contents, MFR2.5, the EVOH of 99.2 moles of % of saponification degree
Resin bed.
(2) use air-cooled type blow molding machine, be 300mm by film blowing molding folding width
Laminated film, this laminated film have layer constitute and thickness be: the 1st additional functionality resin bed b1/ the 2nd auxiliary
Functional resin layer b2/EVOH layer/the 2nd additional functionality resin bed b2/ the 1st additional functionality resin bed
The Rotating fields of b1=10/30/10/30/10um, total90um.
Then, use impulse sealer (FUJI IMPULSE company (strain) system, FA-300-10 model) by it
Three limit heat-sealings, sealing machine uses parameter to be AC220V, 60HZ, 100-130W, 1 second, thus makes bag
Son.
Embodiment four is prepared in high-performance separation film packaging bag:
(1) high-performance separation film is five-layer structure, is followed successively by evoh layer a/ the 1st additional functionality in order
Resin bed b1/ the 2nd additional functionality resin bed b2；
Wherein, the 1st additional functionality resin bed b1 refers to: propylene-alpha-olefin copolymers；
2nd additional functionality resin bed b2 refers to: chlorinated polypropylene；
Evoh layer a refers to: 30 moles of % of ethylene contents, MFR0.8, the EVOH of 99.8 moles of % of saponification degree
Resin bed.
(2) use air-cooled type blow molding machine, be 300mm by film blowing molding folding width
Laminated film, this laminated film have layer constitute and thickness be: evoh layer a/ the 1st additional functionality resin bed
The Rotating fields of b1/ the 2nd additional functionality resin bed b2=8/100/40um, total148um.
Then, use impulse sealer (FUJI IMPULSE company (strain) system, FA-300-10 model) by it
Three limit heat-sealings, sealing machine uses parameter to be AC220V, 60HZ, 100-130W, 1 second, thus makes bag
Son.
Brand-new steam-flaked corn packing and storing embodiment of the method one:
Step 1, by steam-flaked method prepare moisture be 18～22%, temperature be 98～110 DEG C
Moist steam high temperature tabletting corn sheet；
Step 2, the moist steam high temperature tabletting corn sheet wind cooling temperature lowering that step 1 is prepared to 45～55 DEG C,
Obtain moist steam higher temperatures tabletting corn sheet；
Step 3, moist steam higher temperatures tabletting corn sheet step 2 prepared is encased in high-performance separation film
Packaging bag is prepared in the high-performance separation film packaging bag that embodiment 1 prepares, and stores after sealing.
Brand-new steam-flaked corn packing and storing embodiment of the method two:
The present embodiment is distinguished as with brand-new steam-flaked corn packing and storing embodiment of the method one, in step 3,
Moist steam higher temperatures tabletting corn sheet is encased in high-performance separation film packaging bag prepare embodiment 2 and prepare
High-performance separation film packaging bag in, after sealing store.
Brand-new steam-flaked corn packing and storing embodiment of the method three:
The present embodiment is distinguished as with brand-new steam-flaked corn packing and storing embodiment of the method one, in step 3,
Moist steam higher temperatures tabletting corn sheet is encased in high-performance separation film packaging bag prepare embodiment 3 and prepare
High-performance separation film packaging bag in, after sealing store.
Brand-new steam-flaked corn packing and storing embodiment of the method four:
The present embodiment is distinguished as with brand-new steam-flaked corn packing and storing embodiment of the method one, in step 3,
Moist steam higher temperatures tabletting corn sheet is encased in high-performance separation film packaging bag prepare embodiment 4 and prepare
High-performance separation film packaging bag in, after sealing store.
Test example
This test example is used for investigating high-performance separation film packaging bag and steam-flaked corn is stored time and physical property
The impact of shape.
According to brand-new steam-flaked corn packing and storing embodiment of the method one method, employing specification is 350*220
The high-performance separation film packaging bag of mm carry out seal press mold packaging after, be stored in ambient temperature be in 16～
25 DEG C, relative humidity be 45～65% feeder reservoir room in.
Test finds, due to the unidirectional permeability of the steam of the reason expanded with heat and contract with cold and high resistance film, seals
Sample sack after film packaging is in the most closely knit state after tabletting Semen Maydis cools down, and its effect is suitable with compacting,
Create good sealing and oxygen-free environment.
Storage test shows, the high-resistant diaphragm packaging of good seal can store brand-new steam-flaked corn 6 months
Left and right, the color and luster of steam-flaked corn, abnormal smells from the patient all without significantly change, have reached good storage effect.
The embodiment of other brand-new steam-flaked corn packing and storing methods of the present invention has been carried out same examination
Testing, result of the test is similar.
Comparative example 1
This comparative example is for comparing high-performance separation film packaging, normal film packaging and the storage of conventional storage method
Difference between effect.
Test use single factor experiment design, if three test group, respectively high-performance separation film packaging bag group,
Normal film packaging bag group and conventional packaging blow-by group.
The storage object of three test group is brand-new steam-flaked corn, and its moisture is 22%, and temperature is
98～110 DEG C.
Test group 1: brand-new steam-flaked corn is cooled to 45～55 DEG C, is then charged into high-performance and intercepts
During film package bag is prepared in the high-performance separation film packaging bag that embodiment 1 prepares, store after sealing.
Test group 2: brand-new steam-flaked corn is cooled to 20～25 DEG C, is then charged into normal film packaging
In Dai, store after sealing.
Test group 3: after brand-new steam-flaked corn is cooled to room temperature, the uncovered storage of blow-by.
Wherein, storage object is brand-new steam-flaked corn, (350*220 identical with specification sized by packaging bag all
Mm) test bag, the storage capacity of every bag of steam-flaked corn is 1.00 ± 0.05kg.
After storing 2 months, measure the nutrient composition content often organized and situation of going mouldy respectively, the results are shown in Table 1.
The chemical composition of table 1 each group steam-flaked corn after storing February and mycotoxin content (%)
Note: shoulder mark difference represents that significant difference (P < 0.05) or difference are extremely notable (P < 0.01)
Crude fat and soluble starch are the main nutrient substance utilized during fungus growth, and chemistry becomes
Point content results shows, after storing February, crude fat and the soluble starch of high-performance separation film packages groups contain
Amount is significantly higher than other two groups, and 6-(10-hydroxy-6-oxo-trans-1-undecenyl)-.beta.-resorcylic acid lactone and aflatoxin content are significantly lower than other two groups,
Other nutrient composition content respectively organizes no significant difference；Meanwhile, apparent physical behavior result of the test shows, stores 2
After individual month, high-performance separation film packages groups does not finds mildew phenomena, opens the gorgeous Huang of color after bag, has steam-flaked
The fresh fragrance of Semen Maydis；Normal film packages groups top layer yellow green fungus growth is the most fairly obvious, can smell after opening bag
Significantly musty, slightly aobvious humidity；Conventional blow-by group tabletting Semen Maydis goes mouldy the most completely, in blackish green, has knot
Block phenomenon, after opening bag, mycelia dances in the air, and can smell extremely serious musty.
Test proves, compared with normal film and conventional blow-by group, high-performance separation film packages groups can significantly be prolonged
The storage time of long brand-new steam-flaked corn and quality.
To the present invention, other are prepared embodiment preparation-obtained high-performance separation film packaging bag and have carried out same
Test, result of the test is similar.
Comparative example 2
This comparative example is used for comparing high-performance separation film packaging and traditional heated air drying method and is storing between effect
Difference.
Test arranges two test group, respectively high-performance separation film packages groups and traditional heated air drying technique group.
The process object of two test group is brand-new steam-flaked corn, and its moisture is 22%, and temperature is
98～110 DEG C.
Test group 1: brand-new steam-flaked corn is cooled to 45～55 DEG C, is then charged into high-performance and intercepts
Film package bag is prepared in the high-performance separation film packaging bag that embodiment 1 prepares, and stores after sealing.
Test group 2: after brand-new steam-flaked corn is cooled to room temperature, uses hot air drying processing mode, will
Its moisture is down to 10%, is then charged in normal film packaging bag, stores after sealing.
After storing 6 weeks, measure conventional nutrients content and the acid such as the moisture of steam-flaked corn, crude protein
The index such as valency, gelatinization degree, result is as shown in table 2.
Test result indicate that, when using high-performance separation film packing processes to store brand-new steam-flaked corn 42 days,
Its acid value has risen, and gelatinization degree has declined, but other index no significant difference, but high-performance intercepts
The steam-flaked corn that film pack stores has its distinctive fresh fragrance, it is possible to increase animal feed intake and minimizing
Tabletting corn digests the time used in digestive tract, it is often more important that, high-performance separation film sacker's artistic skill
Save and be dried required substantial amounts of energy, reduce environmental pollution and increase economic efficiency.
Table 2 high-resistant diaphragm stores 42d nutrition content with hot air drying steam-flaked corn
To the present invention, other are prepared embodiment preparation-obtained high-performance separation film packaging bag and have carried out same
Test, result of the test is similar.
The above is only the preferred embodiment of the present invention, it is noted that common for the art
For technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications,
These improvements and modifications also should regard protection scope of the present invention.
Claims (10)
1. a high-performance separation film packaging bag, it is characterised in that described high-performance separation film packaging bag uses
Material be high-performance separation film, described high-performance separation film is multi-layer film structure, including n-layer EVOH resin
Layer and m layer additional functionality resin bed；Wherein, n and m is natural number；Each EVOH resin bed and
Each additional functionality resin bed uses laminating technology after carrying out the stacking of any order, and i.e. prepares final
High-performance separation film.
High-performance separation film packaging bag the most according to claim 1, it is characterised in that described EVOH tree
Fat is based on ethylene unit unit and vinyl alcohol construction unit, and if comprising the non-saponified ethylene that dry measure remains
Ester structure unit；Wherein, in described EVOH resin, the content of ethylene unit unit is 20～60 moles of %,
It is preferably 25～50 moles of %, particularly preferably 25～35 moles %；
In described EVOH resin, the saponification degree of vinyl acetate composition is 90～100 moles of %, preferably 95～100
Mole %, particularly preferably 99～99.9 moles %；
Melt flow rate (MFR) MFR of described EVOH resin, at 210 DEG C, load 2, measures under 160g, for
0.5～100g/10 divides, and preferably 1～50g/10 divides, and particularly preferably 3～35g/10 divide；
The thickness of described EVOH resin bed is 0.5～30 μm, preferably 0.8～20 μm, particularly preferably
1～10 μm；
Described additional functionality resin bed is thermoplastic resin；The thickness of described additional functionality resin bed is
1～200 μm, preferably 2～100 μm.
High-performance separation film packaging bag the most according to claim 2, it is characterised in that described thermoplasticity
The material of resin bed is: polythylene resin, polypropylene-based resin, polyolefin resin, polyester resin,
Polyamide-based resin, Corvic, polyvinylidene chloride resin, acrylic resin, polystyrene
Resin, vinyl ester resins, polyester elastomer, polyurethane elastomer, chlorinated polyethylene resin, chlorination gather
Allyl resin, aromatic series or aliphatic poly ketone resin and the polyalcohols of above various types of resins reduction.
High-performance separation film packaging bag the most according to claim 3, it is characterised in that described polyethylene
Resinoid include linear low density polyethylene resin, ldpe resin, ultra-low density polyethylene resin,
Medium density polyethylene resin, high-density polyethylene resin and ethene-alpha-olefin copolymer resin；Wherein, ethylene-α-
In olefin copolymer resin, alkene is the alpha-olefin of carbon number 4～20；
Described polypropylene-based resin includes acrylic resin and propylene-alpha-olefin copolymers resin；Wherein, propylene-α-
In olefin copolymer resin, alkene is the alpha-olefin of carbon number 4～20；
Described polyolefin resin include ethylene-vinyl acetate copolymer, ethylene-vinyl acetate ionomer,
Ethylene-propylene copolymer, ethylene-acrylic acid copolymer, vinyl-acrylate copolymer, polybutylene homopolymer
Or copolymer, polypenthylene homopolymer or copolymer or the homopolymer of above-mentioned alkene or copolymer are through unsaturation
The polyolefin resin of the broad sense of carboxylic acid or carboxylate graft modification.
High-performance separation film packaging bag the most according to claim 1, it is characterised in that described auxiliary merit
Can property resin bed be hydrophobic thermoplastic's resin bed；Described hydrophobic thermoplastic's resin bed is preferably TPO
Resin bed；Described polyolefin type resin layer is preferably polythylene resin layer and polypropylene-based resin layer；
The order that stacks of each EVOH resin bed and each additional functionality resin bed is: EVOH resin bed
For intermediate layer, stack respectively above and below EVOH resin bed and additional functionality resin bed is set.
High-performance separation film packaging bag the most according to claim 1, it is characterised in that each EVOH tree
After lipid layer and each additional functionality resin bed carry out the stacking of any order, at two adjacent resin beds
Between sandwiched bonding resin layer；The thickness of described bonding resin layer is 0.1～30 μm, preferably 0.2～10 μm；
Carry out laminating technology the most again.
High-performance separation film packaging bag the most according to claim 6, it is characterised in that described bonding tree
Lipid layer is: make unsaturated carboxylic acid or its anhydride and polymerization of olefines materialization by additive reaction or graft reaction
The modified olefin base polymer with carboxyl learning bonding and obtain；Wherein, the olefin polymer used
For polyolefin resin, including modified poly ethylene, modified polypropene, ethene improved-propylene copolymer, modification
Ethylene-ethyl acrylate copolymer and ethene improved-vinyl acetate co-polymer；
The unsaturated acid anhydride used is maleic anhydride；The unsaturated carboxylic acid that contains in described bonding resin layer or
Its anhydride amount is 0.001～3 weight %, preferably 0.01～1 weight %, particularly preferably 0.03～0.5 weight %.
8. the high-performance separation film packaging bag that a kind is applied described in any one of claim 1-7 is steam-flaked to brand-new
Corn carries out the method for packing and storing, it is characterised in that comprise the following steps:
Step 1, by steam-flaked method prepare moisture be 18～22%, temperature be 98～110 DEG C
Moist steam high temperature tabletting corn sheet；
Step 2, the moist steam high temperature tabletting corn sheet wind cooling temperature lowering that step 1 is prepared to 45～55 DEG C,
Obtain moist steam higher temperatures tabletting corn sheet；
Step 3, moist steam higher temperatures tabletting corn sheet step 2 prepared is encased in claim 1-7 and appoints
In one described high-performance separation film packaging bag, store after sealing；
Wherein, described high-performance separation film has that barrier properties for gases, expansion and contraction and steam are unidirectional to be passed through
Property；Initial stage after moist steam higher temperatures tabletting corn sheet being encased in high-performance separation film packaging bag and seals,
On the one hand, due to the unidirectional permeability of the steam of packaging bag, moist steam higher temperatures tabletting corn sheet is volatilized
Steam evaporate in external environment condition through packaging bag, and due to the barrier properties for gases of packaging bag, outside gas
Body cannot be introduced into inside packaging bag, so that forming negative pressure in packaging bag, and trends towards forming oxygen-free environment；
On the other hand, owing to packaging bag has expansion and contraction, therefore, cold when moist steam higher temperatures tabletting corn sheet
But, after arriving the process of room temperature, packaging bag cooling is also constantly shunk, on the one hand, packaging bag can evict out of when shrinking
Gas in packaging bag, forms oxygen-free environment；On the other hand, when packaging bag is shunk, can tightly compacted pack
Tabletting corn sheet in Dai, forms good sealing effectiveness；Ultimately form the packaging of good sealing effect and anaerobic
Closed environment in bag；
During the storage of tabletting corn sheet, due to the barrier properties for gases of packaging bag, extraneous gas cannot enter
Enter inside packaging bag, make long term maintenance oxygen-free environment in packaging bag；And due to the tabletting corn in packaging bag
Sheet is normal temperature storage, no longer produces water vapour, and therefore, the water content maintenance of tabletting corn sheet is basically unchanged
State.
Method the most according to claim 8, it is characterised in that step 1 particularly as follows:
In the modulator, to use steam pressure be 0.3～0.5Mpa, temperature is the high-temperature steam of 98～110 DEG C
Modulation corn, the modulation time is 45～100min；Then, the corn after modulation is pressed into thickness 0.5～
Thin slice between 1.5mm, i.e. obtains moist steam high temperature tabletting corn sheet.
The packing and storing method of brand-new steam-flaked corn the most according to claim 8, it is characterised in that
Stored corn sheet is Semen Maydis, Sorghum vulgare Pers., Fructus Hordei Vulgaris, Herba bromi japonici, Oryza glutinosa or Semen Fagopyri Esculenti.
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| CN201610510921.1A CN106005710A (en) | 2016-06-30 | 2016-06-30 | High-performance barrier film packaging bag and method for packaging and storing new-made steam-flaked grains |
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| CN201610510921.1A CN106005710A (en) | 2016-06-30 | 2016-06-30 | High-performance barrier film packaging bag and method for packaging and storing new-made steam-flaked grains |
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| CN106005710A true CN106005710A (en) | 2016-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107379694A (en) * | 2017-07-19 | 2017-11-24 | 日氟荣高分子材料(上海)有限公司 | A kind of water vapor rejection film and its production and use |
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| US20070178268A1 (en) * | 2004-06-10 | 2007-08-02 | The Nippon Synthetic Chemical Industry Co., Ltd | Ethylene-vinyl alcohol copolymer and molded article thereof |
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| JP2000053821A (en) * | 1998-08-10 | 2000-02-22 | Nippon Polyolefin Kk | Polar group-containing resin material and laminate using the same |
| CA2557616A1 (en) * | 2004-03-01 | 2005-09-15 | Aisapack Holding S.A. | Synthetic multilayer object |
| US20070178268A1 (en) * | 2004-06-10 | 2007-08-02 | The Nippon Synthetic Chemical Industry Co., Ltd | Ethylene-vinyl alcohol copolymer and molded article thereof |
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Application publication date: 20161012 |