CN107804047B - It is a kind of easily to cut the antifog epiphragma of high-barrier and its manufacturing method - Google Patents

It is a kind of easily to cut the antifog epiphragma of high-barrier and its manufacturing method Download PDF

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Publication number
CN107804047B
CN107804047B CN201710844721.4A CN201710844721A CN107804047B CN 107804047 B CN107804047 B CN 107804047B CN 201710844721 A CN201710844721 A CN 201710844721A CN 107804047 B CN107804047 B CN 107804047B
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layers
epiphragma
antifog
layer
barrier
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CN107804047A (en
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陈伟
俞国星
孙永庆
余文健
丁磊
邱燕君
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Jiangyin Baobai New Packaging Materials Co ltd
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JIANGSU SHENLONG PACKING MATERIALS Co Ltd
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Priority to CN201710844721.4A priority Critical patent/CN107804047B/en
Priority to PCT/CN2017/104938 priority patent/WO2019056414A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/58—Cuttability

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses one kind easily to cut the antifog epiphragma of high-barrier, forms including the PP layer being arranged successively or PET-G layers, the first Tie layers, the first PA layers, the 2nd PA layers or evoh layer, the 3rd PA layers, the 2nd Tie layers and PE-AF layers of coextru-lamination；First PA layers it is identical as the 3rd PA layers of material, all include the copolyamide of PA6 and PA66, the 2nd PA layers of material includes amorphous polyamides.The method for manufacturing this epiphragma is also disclosed, realizes that film has shrinkage stress by double drawings or more bubble methods.The present invention passes through special modified to the PA layer in epiphragma, so that epiphragma realizes that different materials reach different gas-premeables, different Gas permeabilities can be designed according to different shelf life, after shelf life arrives, it packs the epiphragma heaved and becomes flat, make it have shelf-life warning function；And the cooperation of formula and processing technology then makes this epiphragma shrinkage stress with higher, realizes that when meeting extraneous pressing, the traces such as fold can slowly mitigate up to disappearing.

Description

It is a kind of easily to cut the antifog epiphragma of high-barrier and its manufacturing method
Technical field
The antifog epiphragma of high-barrier and its manufacturing method are easily cut the present invention relates to a kind of.
Background technique
Current epiphragma does not have shelf-life warning function, and such as packaged cold fresh meat, the shelf-life is generally 4 To 7 days, cooked meat its shelf-life of such as sausage was generally 30 days (fresh meat controlled atmosphere fresh-keeping packing, red meat controlled atmosphere fresh-keeping packings Protective gas by O2And CO2Composition, O2Concentration require more than 60% red shade for being just able to maintain meat, CO2Minimum concentration not The breeding of bacterium can be just effectively inhibited lower than 25%, the gas composition of pork controlled atmospheric packing is the O of 60%-70% at present2With The CO of 30%-40%2；And CO is filled with for microwave dish, bean product and livestock and poultry cooked meat product2And N2Coliform can effectively be restrained Group's breeding.Application of the controlled atmosphere fresh-keeping packing in cooked meat product: it is general to be quickly cooled down by vacuum, use 25%-35%CO2, 75%- 35%N2Controlled atmosphere fresh-keeping packing), consumer need to find label and just know whether also within the shelf-life, if it is possible to certainly by epiphragma The state of the body such as concave-convex different display shelf-lifves, it is then quite significant to play shelf life improvement of visual effect；In addition, epiphragma is more at present It is produced using compound or multi-layer co-extruded technique, display performance is bad, in addition the material of epiphragma itself, consumer take packaging to see Afterwards, it is easy to remain nail print or other folding lines on epiphragma；And existing epiphragma cut-out performance is bad, it is often viscous in heat-sealing Knife.
The structure of current epiphragma is PP or PET/Tie/PA/PA/PA/Tie/PE-AF (i.e. polypropylene layer or poly- to benzene two Formic acid ethylene glycol ester layer/adhesive layer/tri- layer nylon layer/adhesive layer/polyethylene layer with anti-fog effect), current structure makes more Use PET as outer layer, polarity causes greatly antifoggant migration serious, and especially summer can not uncoiling；And external product outer layer uses more PP is intended to label thereon, and labeling is unfavorable for the recycling and reusing of packaging.The patent of 102873951 A of Publication No. CN: a kind of Printable Biaxially oriented polypropylene antifog film and its manufacturing method, antifog film include upper layer, upper sublevel, middle layer, lower sublevel, Lower layer is total to five-layer structure, is configured at the middle and upper levels by the raw material containing following weight content: 94-99% copolymer polypropylene, 0.5- 5% antifoggant, 0.5-2% antiblocking agent；Upper sublevel is configured to by the raw material containing following weight content: 96-99.5% homopolymerization Polypropylene, 0.5-5% antifoggant；Middle layer is configured to by the raw material containing following weight content: 96-99.5% homopolypropylene, 0.5-5% antifoggant；Lower sublevel is configured to by the raw material containing following weight content: 100% homopolypropylene；Lower layer is by containing The raw material of following weight content is configured to: 98-99.5% copolymer polypropylene, 0.5-2.5% antiblocking agent.It has good anti- Mist ability, but do not have shelf-life warning function, and after consumer takes packaging to see, be easy to remain on epiphragma nail print or its His folding line.The patent of Publication No. CN 104669742A: a kind of impermeable thin-film material of high-barrier, using seven-layer co-extrusion blown film Technique produces the impermeable thin-film material of high-barrier that structure is PA/TIE/PP/PVDC/PP/TIE/PA, but does not also have goods Frame phase improvement of visual effect.
Summary of the invention
Present invention mainly solves the technical issues of be, provide it is a kind of easily cut the antifog epiphragma of high-barrier, with guaranteeing the quality Phase warning function, consumer can directly by observe epiphragma heave or it is flat i.e. know epiphragma in food whether be already expired Shelf-life；And this epiphragma can improve the display performance of packaging, and the deformation of epiphragma or fold thereon can fade away；Also have Standby excellent cut-out performance.
The technical solution adopted by the present invention to solve the technical problems is: one kind easily cutting the antifog epiphragma of high-barrier, including The PP layer being arranged successively or PET-G layers, the first Tie layers, the first PA layers, the 2nd PA layers or evoh layer, the 3rd PA layers, the 2nd Tie Layer and PE-AF layers of coextru-lamination form；First PA layers it is identical as the 3rd PA layers of material, all include PA6 and PA66 copolymerization polyamides Amine, the 2nd PA layers of material includes amorphous polyamides.Wherein, EVOH, that is, ethylene-vinyl alcohol copolymer, the barrier property of EVOH Depending on the content of ethylene, in general when ethylene contents increase, barrier properties for gases decline, but it is easy to process.PP layers of outer layer Or PET-G (i.e. amorphism PET) layer, knife will not be glued when last epiphragma seals in this way, preferred embodiment is that outer layer uses PET-G Layer, can assign epiphragma excellent glossiness, have excellent printing performance more important is it, can not label in this way, It directly prints, is more advantageous to recycling and reusing.The design of overall structure and formula so is easily cut, not viscous boiling hot knife.
As the of the invention a kind of further improvement for easily cutting the antifog epiphragma of high-barrier, the first PA layers with the 3rd PA layers of material Matter is copolyamide PA6.66, and wherein the dosage of PA66 is less than 10%；2nd PA layers material be amorphous polyamides. The copolymer of PA6.66, that is, PA6 and PA66.Epiphragma made of in this way is mainly used for the shelf-life on 4 to 7 days cold fresh meats, epiphragma It can heave after inflation, by adjusting the Gas permeability of the dosage adjustment epiphragma of PA66 in copolyamide PA6.66, realize The epiphragma heaved after corresponding number of days becomes flat, and such consumer only need to be known that its shelf-life according to whether epiphragma is heaved Whether have reached, plays the role of shelf-life warning.
As the of the invention a kind of further improvement for easily cutting the antifog epiphragma of high-barrier, the first PA layer of material is that copolymerization gathers The copolymer of amide PA66.6 and MXD6, the dosage of the PA6 in copolyamide PA66.6 is less than 20%；2nd PA layers of material For the copolymer of amorphous polyamides and MXD6.(difference of PA66.6 and PA6.66 exist the copolymer of PA66.6, that is, PA66 and PA6 It is high in the content of the former PA66 (nylon66 fiber))；MXD6 is to be synthesized using m-xylene diamine and adipic acid as raw material by polycondensation reaction A kind of crystallinity nylon resin；Epiphragma made of in this way is mainly used for cooked meat such as sausage of the shelf-life at 15 days to 30 days Deng packaging on, epiphragma inflation after can heave, by adjusting the PA6 (nylon 6) in copolyamide PA66.6 dosage adjust The Gas permeability of epiphragma realizes that the epiphragma heaved after corresponding number of days (different formulas realize different number of days) becomes Flat, whether such consumer need to only heave according to epiphragma is known that whether its shelf-life has reached, and has shelf life and visually imitates Fruit.
As the of the invention a kind of further improvement for easily cutting the antifog epiphragma of high-barrier, the first PA layer with the 2nd in PA layers The dosage of MXD6 is less than 60%.
As a kind of further improvement for easily cutting the antifog epiphragma of high-barrier of the invention, the fusing point of variety classes nylon meets Size relation below: PA6.66 < PA6 < MXD6 < PA66.6 < PA66；The fusing point of MXD6 is 230 DEG C -240 DEG C.
As a kind of further improvement for easily cutting the antifog epiphragma of high-barrier of the invention, PE-AF layers of one side coextru-lamination 2nd Tie layers, another side coextru-lamination release paper.This be as more preferably technical solution, the side of film be arranged from Type paper, film is wound simultaneously with release paper when winding, is avoided the loss of hot sealing layer antifoggant and is transferred to outer layer.Due to release paper The case where adjacent thin film layers are kept apart, uncoiling will not be led to not since the migration of antifoggant is serious when summer.When use Again in food packaging after then release paper is peeled off.
As a kind of further improvement for easily cutting the antifog epiphragma of high-barrier of the invention, PE-AF layers is by PE particles Middle addition antifog master batch coextrusion blown film be made or the PE substrate made of blown film on be coated with antifoggant.Preferably second scheme It is coated with antifoggant offline, the additive amount of such antifoggant is less, reduces costs.
It comprises the technical steps that: Multi-layer co-extrusion film-blowing/or multi-layer co-extruded curtain coating → biaxial tension or the mostly stretching of bubble method → Cutting → winding → packaging；The technological parameter of each process is as follows:
Processing film temperature:
A, blown film: 210~230 DEG C of die head
B, it is cast: 220~250 DEG C of die head
Stretching ratio:
A, coextrusion film blowing: 3~4 times of longitudinal stretching, 4~5 times of cross directional stretch,
B, coextrusion casting: 3~4 times of longitudinal stretching, 4~5 times of cross directional stretch,
Draft temperature: 80~160 DEG C,
Annealing setting temperature: 80~120 DEG C.
Cooperate drawing process by aforementioned formula, manufactured epiphragma has the no performance of conventional film: after inflation is heaved Epiphragma causes epiphragma to deform or generate fold in consumer's finger nail or other reasons can fade away, improve the displaying of packaging Performance.
The further improvements in methods of the antifog epiphragma of high-barrier are easily cut as present invention manufacture, it is steep the step of farad is stretched more For cylinder film first time blow-up → heating → second of blow-up → sizing；Ratio 1.5~2.0 is propelled the price of for the first time, and propel the price of terminates for the first time 80~100um of thickness of antifog epiphragma afterwards；Second of blow-up ratio 1.5~5.0, the thickness of antifog epiphragma after propelling the price of for the second time 25um；150~200 DEG C of heating temperature；90~150 DEG C of setting temperature；30~45 DEG C of cooling temperature.Wherein, ratio is propelled the price of for the first time 1.5~2.0,80~100um of final thickness；Second of blow-up is than 1.5~5.0 (preferably according to the extension at break propelled the price of for the first time Rate, which calculates, propels the price of ratio, and final fracture elongation is reduced to 80%~100%), final thickness 25um；Heating temperature 150~200 DEG C, preferably 185 DEG C；90~150 DEG C of setting temperature, preferably 100~120 DEG C；30~45 DEG C of cooling temperature, preferably 30 DEG C.
The further improvements in methods that the antifog epiphragma of high-barrier is easily cut as present invention manufacture, in biaxial tension or more bubbles Method is additionally provided with the process handled co-extrusion film EB after stretching this process.It is taken since the PE molecule in PE-AF layers is stretched Heat sealability, which reduces, backward even disappears, and needing to handle (electron beam highest energy 200keV) by EB (high-voltage electricity beamlet) makes point Subchain upsets winding again, obtains heat sealability.After EB processing the epiphragma heat sealability being finally made is reinforced.
The beneficial effects of the present invention are as follows:
1, have shelf-life warning function, consumer can directly by observe epiphragma heave or it is flat i.e. know cover Whether the food in film is already expired the shelf-life；And this epiphragma can improve the display performance of packaging, the deformation of epiphragma or thereon Fold can fade away；It is also equipped with excellent cut-out performance.
2, outer layer uses PET-G layers, can assign epiphragma excellent glossiness, have excellent printing more important is it Performance can not label in this way, directly print, be more advantageous to recycling and reusing.The design of overall structure and formula is easily cut out It cuts, not viscous boiling hot knife.
3, by adjusting the Gas permeability of the different formulations adjustment epiphragma of modified PA, the drum after corresponding number of days is realized The epiphragma risen becomes flat, and whether such consumer need to only heave according to epiphragma is known that whether its shelf-life has reached, and has Shelf life improvement of visual effect.
4, adjacent thin film layers are kept apart in the setting of release paper, will not be caused since the migration of antifoggant is serious when summer Can not uncoiling the case where.
5, coating antifoggant makes the additive amount of antifoggant less offline, reduces costs.
6, the epiphragma after inflation is heaved causes epiphragma to deform or generate fold in consumer's finger nail or other reasons can be by Fade mistake, improves the display performance of packaging.
7, after EB processing the heat sealability for the epiphragma being finally made is reinforced.
Detailed description of the invention
Fig. 1 is a kind of hierarchical structure schematic diagram for easily cutting the antifog epiphragma embodiment one of high-barrier of the present invention；
Fig. 2 is the hierarchical structure schematic diagram of the embodiment of the present invention two；
Fig. 3 is the hierarchical structure schematic diagram of the embodiment of the present invention three；
Fig. 4 is the hierarchical structure schematic diagram of the embodiment of the present invention four；
In figure: 1, PP layer 2, PET-G layer 3, the first Tie layer 4, the first PA layer 5, the 2nd PA layer 6, evoh layer 7, Three PA layers 8, the 2nd Tie layer 9, PE-AF layer 10, release paper.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
The bilingual of each substance according to the present invention is as follows:
PP polypropylene
PET polyethylene terephthalate
Tie adhesive layer
PA nylon
Polyethylene layer of the PE-AF with anti-fog effect
PA6 nylon 6, i.e. polycaprolactam
PA66 nylon66 fiber, i.e. polyhexamethylene adipamide
EVOH ethylene-vinyl alcohol copolymer
PET-G amorphism PET
The polymer of MXD6 m-xylene diamine and adipic acid
PE polyethylene
Embodiment one:
The antifog epiphragma of high-barrier easily is cut as shown in Figure 1, a kind of, including PP layer 1, the first Tie layer 3, the being arranged successively One PA layer 4, evoh layer 6, the 3rd PA layer 7, the 2nd Tie layer 8 and 9 coextru-lamination of PE-AF layer form；First PA layer 4 and the 3rd PA 7 material of layer are identical, all include the copolyamide of PA6 and PA66, and the material of the first PA layer 4 and the 3rd PA layer 7 is to be copolymerized to gather Amide PA6.66, the wherein dosage 8% of PA66；The 2nd Tie layer 8 of one side coextru-lamination of PE-AF layer 9, another side coextru-lamination Release paper 10.PE-AF layer 9 is to be coated with antifoggant on the PE substrate made of blown film.
The method that manufacture easily cuts the antifog epiphragma of high-barrier, comprises the technical steps that: multi-layer co-extruded curtain coating → two-way drawing → cutting → is stretched to wind → pack.The process to co-extrusion film EB processing is additionally provided with after this process of biaxial tension.
The gas replenishment process of this antifog epiphragma uses controlled atmosphere technology, specific as follows: using M-380 type controlled atmosphere fresh-keeping packing Cold fresh meat is put into packing box by machine, and in closed chamber (chamber of gas-control packing device), pumping → inflation (is filled with 60% Oxygen, 40% the mixed gas of carbon dioxide packed using this epiphragma) → heat-sealing.By the adjustment of pressure, make chamber Indoor air pressure be greater than external environment atmospheric pressure, after package encapsulation is good, device for opening, film will because of internal and external pressure difference and to It sticks out outside, by the cold fresh meat after packaging as preservation under the conditions of 3 ± 1 DEG C of temperature.According to the permeability of shelf life and film, benefit With pressure difference so as to adjust inflation content (wherein, controlled atmosphere fresh-keeping packing machine preheating 40min, the heat-sealing temperature 170 in packing DEG C, gas inlet pressure be 5MPa, the heat-sealing time be 2s, heat-sealing length be 28cm, pumpdown time 4s, inflationtime 5s, The blowing pressure 0.15MPa) after tested, such its shelf life improvement of visual effect of antifog epiphragma in cold fresh meat packaging is seven days (i.e. inflation heave after epiphragma become flat after seven days), suitable for the shelf-life one week or so cold fresh meat packaging.
Embodiment two:
It is with the difference of embodiment one: as shown in Fig. 2, including PP layer 1, the first Tie layer 3, the first PA being arranged successively The 4, the 2nd PA layer 5 of layer, the 3rd PA layer 7, the 2nd Tie layer 8 and 9 coextru-lamination of PE-AF layer form；The material of first PA layer 4 is total The copolymer of polyester-polyamide PA66.6 and MXD6, the dosage of the PA6 in copolyamide PA66.6 are 15%；2nd PA layer 5 Material is the copolymer of amorphous polyamides and MXD6.The dosage of first PA layer 4 and the MXD6 in the 2nd PA layer 5 are 55%.
The method that manufacture easily cuts the antifog epiphragma of high-barrier, comprises the technical steps that: multi-layer co-extruded curtain coating → more steep method Stretching → cutting → winding → packaging.The step of wherein more bubble farads are stretched is cylinder film first time blow-up → heating → blow-up → fixed Type.The process to co-extrusion film EB processing is additionally provided with after more bubble methods stretch this process.
After tested, such its shelf life improvement of visual effect of antifog epiphragma in sausage packaging is 30 days, is suitable for the shelf-life In the packaging of one month or so cooked meat.
Embodiment three:
It is with the difference of embodiment one, as shown in figure 3, including PET-G layer 2, the first Tie layer 3, first being arranged successively PA layer 4, the 2nd PA layer 5, the 3rd PA layer 7, the 2nd Tie layer 8 and 9 coextru-lamination of PE-AF layer form；First PA layer 4 and the 3rd PA 7 material of layer are identical, all include the copolyamide of PA6 and PA66, the material of the 2nd PA layer 5 includes amorphous polyamides.First The material of PA layer 4 and the 3rd PA layer 7 is copolyamide PA6.66, and wherein the dosage of PA66 is 3%；The material of 2nd PA layer 5 Matter is amorphous polyamides.
After tested, such its shelf life improvement of visual effect of antifog epiphragma in cold fresh meat packaging is four days, suitable for guaranteeing the quality Packaging of the phase in four days cold fresh meats.
Example IV:
It is with the difference of embodiment one, as shown in figure 4, including PET-G layer 2, the first Tie layer 3, first being arranged successively PA layer 4, evoh layer 6, the 3rd PA layer 7, the 2nd Tie layer 8 and 9 coextru-lamination of PE-AF layer form；First PA layer 4 and the 3rd PA layer 7 Material is identical, all includes the copolyamide of PA6 and PA66, and the material of the first PA layer 4 is copolyamide PA66.6 and MXD6 Copolymer, the dosage of the PA6 in copolyamide PA66.6 is 14%；The dosage of MXD6 in first PA layer 4 is 25%.
After tested, such its shelf life improvement of visual effect of antifog epiphragma in sausage packaging is 15 days, is suitable for the shelf-life In the packaging of the cooked meat of or so two weeks.
The fusing point of variety classes nylon meets size relation below: PA6.66 < PA6 < MXD6 < PA66.6 < PA66； The fusing point of MXD6 is 230 DEG C -240 DEG C.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as protection scope of the present invention.

Claims (9)

1. one kind easily cuts the antifog epiphragma of high-barrier, including the PP layer being arranged successively or PET-G layers, the first Tie layers, the first PA Layer, the 2nd PA layers, the 3rd PA layers, the 2nd Tie layers and PE-AF layers of coextru-lamination form；First PA layers with the 3rd PA layers of material phase It together, all include the copolyamide of PA6 and PA66, the 2nd PA layers of material includes amorphous polyamides；First PA layers and third PA layers of material is copolyamide PA6.66, and wherein the dosage of PA66 is less than 10%；2nd PA layers of material is amorphous poly- Amide；PE-AF layers for added in PE particle antifog master batch be coextruded blown film be made or in blown film made of on PE substrate It is coated with antifoggant.
2. one kind easily cuts the antifog epiphragma of high-barrier, including the PP layer being arranged successively or PET-G layers, the first Tie layers, the first PA Layer, the 2nd PA layers, the 3rd PA layers, the 2nd Tie layers and PE-AF layers of coextru-lamination form；PE-AF layers is by adding in PE particle Add antifog master batch coextrusion blown film be made or the PE substrate made of blown film on be coated with antifoggant；First PA layers and the 3rd PA layers of material Matter is identical, all includes the copolyamide of PA6 and PA66, the 2nd PA layers of material includes amorphous polyamides；First PA layers Material is the copolymer of copolyamide PA66.6 and MXD6, and the dosage of the PA6 in copolyamide PA66.6 is less than 20%；The Two PA layers of material is the copolymer of amorphous polyamides and MXD6.
3. according to claim 2 easily cut the antifog epiphragma of high-barrier, which is characterized in that the described first PA layers and the 2nd PA The dosage of MXD6 in layer is less than 60%.
4. according to claim 1 or 2 easily cut the antifog epiphragma of high-barrier, which is characterized in that variety classes nylon melts Point meets size relation below: PA6.66 < PA6 < MXD6 < PA66.6 < PA66；The fusing point of MXD6 is 230 DEG C -240 DEG C.
5. according to claim 1 easily cut the antifog epiphragma of high-barrier, which is characterized in that PE-AF layers of the one side is total The compound 2nd Tie layers are squeezed, another side coextru-lamination release paper.
6. according to claim 1 easily cut the antifog epiphragma of high-barrier, which is characterized in that antifog each thickness degree of epiphragma It is as follows: PP layers or PET-G layers of 5um, the first Tie layers of 2um, the first PA layers of 2um, the 2nd PA layers of 4um, the 3rd PA layers of 2um, second Tie layers of 2um, PE-AF layers of 8um.
7. the method that manufacture easily cuts the antifog epiphragma of high-barrier as claimed any one in claims 1 to 3, which is characterized in that It comprises the technical steps that: Multi-layer co-extrusion film-blowing/or multi-layer co-extruded curtain coating → biaxial tension or more bubble method stretching → cutting → receipts Volume → packaging；The technological parameter of each process is as follows:
Processing film temperature:
A, blown film: 210 ~ 230 DEG C of die head
B, it is cast: 220 ~ 250 DEG C of die head
Stretching ratio:
A, coextrusion film blowing: 3 ~ 4 times of longitudinal stretching, 4 ~ 5 times of cross directional stretch,
B, coextrusion casting: 3 ~ 4 times of longitudinal stretching, 4 ~ 5 times of cross directional stretch,
Draft temperature: 80 ~ 160 DEG C,
Annealing setting temperature: 80 ~ 120 DEG C.
8. the method according to claim 7 for easily cutting the antifog epiphragma of high-barrier, which is characterized in that more bubble methods stretch The step of be cylinder film first time blow-up → heating → second of blow-up → sizing；Ratio 1.5 ~ 2.0 is propelled the price of for the first time, is propelled the price of for the first time After antifog epiphragma 80 ~ 100um of thickness；Second of blow-up ratio 1.5 ~ 5.0, the thickness of antifog epiphragma after propelling the price of for the second time Spend 25um；150 ~ 200 DEG C of heating temperature；90 ~ 150 DEG C of setting temperature；30 ~ 45 DEG C of cooling temperature.
9. the method according to claim 7 for easily cutting the antifog epiphragma of high-barrier, which is characterized in that in the biaxial tension Or more bubble methods stretch this process and are additionally provided with the process handled co-extrusion film EB later.
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