CN103203919B - High-barrier semi-high temperature cooking liquid packaging material and packaging bag made of the same - Google Patents
High-barrier semi-high temperature cooking liquid packaging material and packaging bag made of the same Download PDFInfo
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Abstract
The invention relates to a high-barrier semi-high temperature cooking liquid packaging material and a packaging bag made of the same. The high-barrier semi-high temperature cooking liquid packaging material is a composite membrane prepared by stacking a polyester film (PET) layer, an aluminum foil (Al) layer, a nylon (PA) layer and a polyethylene film (PE) layer from top to bottom by a dry compound machine. The PE layer is prepared by coextrusion blow molding on a surface layer, a middle layer and a heat seal layer; the surface layer is prepared by blending metallocene PE and LDPE in a weight ratio of 2-4:1; the middle layer is prepared by blending metallocene PE and LDPE in a weight ratio of 3-5:1, and adding ethylene propylene copolymer elastomer accounting for 10%-15% of the total weight of the middle layer; and the heat seal layer is prepared by blending metallocene PE and zinc neutralized ethylene copolymer in a weight ratio of 3-5:1. The invention employs a high quality material containing metallocene PE, which is added with a proper amount of an ethylene propylene copolymer elastomer, and especially the heat seal layer is added with the zinc neutralized ethylene copolymer; and the PE layer prepared through blow molding by a three-layer co-extrusion film blowing machine.
Description
Technical field
The present invention relates to a kind of packaging material, particularly a kind of high-barrier half thermophilic digestion liquid packaging material and the packaging bag of being made up of it.
Background technology
High-temperature retort bag is that the United States Navy Department research sixties in last century is done and solved astronaut's food and the packaging composite film material succeeded in developing.But high-temperature retort bag is not developed in US and European various countries, imports Japan into afterwards, but obtains the speedup of annual 15% in Japan, develop rapidly and extensive use.The food of high-temperature retort bag packaging, is developed into hundreds of food of the seventies by tens of kinds of the sixties in last century, the food to the nineties high-temperature retort bag packaging reaches more than 800 and plants, and has the various food such as solid, liquid, slurry.The weight of packaging develops into current 1kg, 2kg by original 200g ~ 500g/ inner wrapping only, even 5kg/ large-scale business high-temperature retort bag only.The pattern of packaging bag develops into the various types such as current Self stand bag, pallet by original common three banding combined types.
High-temperature retort bag has following features: (one) can kill whole bacterium, and sterilization together with the while of packaging material and food, shelf life storage is long.The transparent shelf-life above one year, the opaque effective period of food quality having more than 2 years; (2) the oxygen flow rate of perviousness of packaging material is all close to zero, and therefore content can not occur putrid and deteriorated; (3) high-temperature retort bag packaging food, can cold food also can heat after eat again, instant; (4) high-temperature retort bag food face can be preserved under ambient temperature and moisture, need not refrigerating, can save energy, and it is convenient to preserve; (5) open convenient, food sack has and easily tears the otch such as triangular form or drum, is convenient to open; (6) can produce with the production technology and eqUipment of tinned food, therefore, high-temperature retort bag is foods packed in carton containers again; (7) heat-sealing is reliable, easily, discarded object easily processes.
The raising day by day of the development continual and steady along with China's economic and living standards of the people, the requirement of people to food is more and more higher.In order to improve circulation cycle and the shelf life of food, the effect of packaging for foodstuff becomes more and more important.Therefore, for the material of packaging for foodstuff except good mechanical performance will be had, as hot strength, outside tear-resistant, impact strength etc., higher barrier must be had, especially oxygen-barrier property packaging material food is served guarantee the quality, fresh-keeping, protect local flavor and extend shelf life play a part key.And high-barrier packaging material is except must having good resistance oxygen (as fatty foods), resistance wet (as dried foods) or flavor barrier (as aromatise foods), also to there is good chemical stability, as the feature such as high-temperature sterilization and cryopreservation of applicable food.The above requirement of the positive demand fulfillment of fruit juice pack for liquids, the large-scale fruit juice flexible package punch on current common market, adopts plastic bottle body, cost intensive substantially, and it is larger and yielding that bottle transport occupies space, very inconvenience.Along with the development of packing technique, the application of juice packages bag is more and more extensive, general employing polyester film/aluminium foil/nylon/cast polypropylene film or thermophilic digestion polyethylene film [PET/AL/PA/RCPP (or thermophilic digestion PE)] combined package bag, this structure can meet thermophilic digestion sterilization requirement, but because RCPP (or thermophilic digestion PE) itself is easily crisp, not resistance to fall and seal resistance tocrocking difference etc. shortcoming, make it can only be used for small-sized flexible package punch, and be not suitable for large-scale (more than 2kg) fruit juice flexible package punch.
Summary of the invention
The object of the present invention is to provide and a kind of resistance toly fall and seal resistance tocrocking good high-barrier half thermophilic digestion liquid packaging material.
The large-scale pack for liquids that the present invention also provides a kind of above-mentioned packaging material to make.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of high-barrier half thermophilic digestion liquid packaging material, by dry compound machine, polyester film (PET) layer, aluminium foil (Al) layer, nylon (PA) layer and polyethylene film (PE) layer four-level membrane are stacked rear compound from top to bottom to make composite membrane, described PE layer is obtained by the three-layer co-extruded blowing of top layer, middle level and hot sealing layer, top layer adopt metallocene PE and LDPE with 2-4: 1 weight ratio blendedly to obtain; Middle level adopt metallocene PE and LDPE with 3-5: 1 weight ratio blended after, add the ethylene-propylene copolymer elastomer accounting for middle level gross weight 10%-15% and make; The weight ratio of hot sealing layer employing metallocene PE and zinc neutrality vinyl acid copolymer 3-5: 1 is blended to be obtained.The present invention selects the quality material containing metallocene PE, adds appropriate ethylene propylene copolymer elastomer, adds zinc neutrality vinyl acid copolymer especially, utilize three-layer co-extruded inflation film manufacturing machine blowing to obtain PE layer at hot sealing layer.This PE layer and PET/AL/PA laminated film carry out compound, finally the obtained high-barrier half thermophilic digestion liquid packaging material that can be used for juice packages.These packaging material, through processing further, obtain large-scale pack for liquids.
As preferably, in PE layer gross thickness 100%, then the thickness on top layer is 25 ± 10%, the thickness in middle level is 50 ± 10%, the thickness of hot sealing layer is 25 ± 10%.Further preferably, in PE layer gross thickness 100%, then the thickness on top layer is 25 ± 2%, the thickness in middle level is 50 ± 4%, the thickness of hot sealing layer is 25 ± 2%.Top layer: provide tension force and basic heat hardiness, middle level: provide remarkable toughness, improves the anti-puncture of composite finished product, shoulders impact property etc., internal layer: provide remarkable hot sticky performance and anti-sealing pollutant performance, meet boiling demand.
As preferably, the thickness of PE layer film is 60-120 μm, more preferably 80-110 μm.Gross thickness is thicker, more can provide excellent drop performance, can improve splendid attire content quality.But the thicker cost of thickness is higher, so will consider Cost Problems while meeting performance, this thickness range is proper.
As preferably, the density of described metallocene PE is 0.915-0.925g/cm
3, fusing point 118-123 DEG C; The density of described LDPE is 0.920-0.926g/cm
3, fusing point 108-112 DEG C; Ethylene contents 8-12% in ethylene-propylene copolymer, density is 0.875-0.882g/cm
3, fusing point 95-110 DEG C.
As preferably, the preparation method of described PE layer is as follows:
1) according to proportioning, add top layer raw material in layered material bucket outside, in the hopper of middle level, add middle level raw material, in internal layer hopper, add hot sealing layer raw material;
2), after each hopper mixes respectively, extrude through three-layer co-extruded inflation film manufacturing machine, by outer, in, interiorly three-layer co-extrudedly on die head, blow out the cylinder film that thickness is 120-240 μm;
3) trimming of cylinder film is for subsequent use after separating rolling.
As preferably, in described PE layer, middle level by metallocene PE, LDPE and ethylene-propylene copolymer elastomer with 5: 1: 1 weight ratio blended after make.
As preferably, described pet layer is single or double corona, and thickness is the thickness of 2-21 μm, Al layer be 7-30 μm, PA layer is two-sided or one side corona, and thickness is 12-25 μm.
A kind of large-scale pack for liquids is obtained through itemize, bag technique by described high-barrier half thermophilic digestion liquid packaging material.Large-scale pack for liquids of the present invention, its name of product is high-barrier half high-temp liquid (fruit juice) retort pouch.
The present invention is directed to RCPP fragile under low temperature, not resistance to fall and seal resistance tocrocking difference etc. shortcoming, develop and a kind of there is remarkable sealing, high thermal viscosity and contamination seal, be applicable to half thermophilic digestion level PE of high impact and puncture resistance, it selects different high-quality PE raw material, add appropriate ethylene propylene copolymer elastomer, add zinc neutrality vinyl acid copolymer at hot sealing layer especially, utilize three-layer co-extruded inflation film manufacturing machine blowing to obtain.This PE and PET/AL/PA laminated film carries out compound, then enters itemize, bag, finally the obtained large-scale juice packages bag of high-barrier.The present invention also has following advantage:
(1) in the making of PE layer, select different high-quality PE raw material, add appropriate ethylene propylene copolymer elastomer, add zinc neutrality vinyl acid copolymer at hot sealing layer especially;
(2) this product is selected and is had remarkable sealing, high thermal viscosity and contamination seal, is applicable to half thermophilic digestion level PE of high impact and puncture resistance, and solving large-scale liquid (fruit juice) packaging bag should the high temperature resistant resistance to problem fallen again;
(3) the large-scale liquid of high-barrier half thermophilic digestion (fruit juice) packaging bag possesses half excellent thermophilic digestion heat sealability, packs indeformable not bale broken bottom pour ladle when second thermophilic digestion of 111 DEG C/30min;
(4) the large-scale liquid of high-barrier half thermophilic digestion (fruit juice) packaging bag possesses excellent shock resistance, filling more than 5kg liquid (sack specification: 35cm × 45cm), and 1 meter high arbitrarily angled falls not bale broken.
(5) aluminium foil material, light-proofness is good, and barrier is excellent;
(6) use this product, effectively save the raw material of packaging, save transport space.
Detailed description of the invention
Below by specific embodiment, technical scheme of the present invention is described in further detail.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation make the present invention and/or change all will fall into scope.
In the present invention, if not refer in particular to, all parts, percentage are unit of weight, and all equipment and raw material etc. all can be buied from market or the industry is conventional.
Zinc neutrality vinyl acid copolymer, Exxon Mobil IOTEK3100;
Ethylene propylene copolymer elastomer, Exxon Mobil 3980FL;
Metallocene PE, Exxon Mobil dust can precious 2005HH.
Embodiment 1:
1, the preparation of PE layer: PE layer is obtained by the three-layer co-extruded blowing of top layer, middle level and hot sealing layer, top layer adopts metallocene PE and LDPE blended with 3: 1 weight ratios, middle level adopts metallocene PE, LDPE, ethylene propylene copolymer elastomer blended with 5: 1: 1 weight ratios, and hot sealing layer (internal layer) adopts the weight ratio of metallocene PE and zinc neutrality vinyl acid copolymer 4: 1 blended.Concrete grammar is as follows:
1) according to said ratio, add top layer raw material in layered material bucket outside, in the hopper of middle level, add middle level raw material, in internal layer hopper, add hot sealing layer raw material; In PE layer gross thickness 100%, the thickness controlling top layer is 25 ± 2%, the thickness in middle level is 50 ± 4%, the thickness of hot sealing layer is 25 ± 2%;
2), after each hopper mixes respectively, extrude through three-layer co-extruded inflation film manufacturing machine, by outer, in, interiorly three-layer co-extrudedly on die head, blow out the cylinder film that thickness is 200 μm;
3) trimming of cylinder film obtains thickness after separating rolling is that the PE film of 100 μm is for subsequent use.
2, the production of large-scale pack for liquids:
By dry compound machine, 12 μm, polyester film (PET) layer, 7 μm, aluminium foil (Al) layer, 15 μm, nylon (PA) layer and PE layer four-level membrane obtained in the previous step are stacked rear compounded composite membrane from top to bottom, then itemize, bag, make large-scale pack for liquids, it can be used for the packaging of the liquid such as fruit juice.
Embodiment 2:
The production of pack for liquids is with embodiment 1, difference is: 1, the preparation of PE layer: PE layer is obtained by the three-layer co-extruded blowing of top layer, middle level and hot sealing layer, top layer adopts metallocene PE and LDPE blended with 2: 1 weight ratios, middle level adopts metallocene PE, LDPE, ethylene propylene copolymer elastomer blended with 5: 1: 1 weight ratios, and hot sealing layer (internal layer) adopts the weight ratio of metallocene PE and zinc neutrality vinyl acid copolymer 3: 1 blended.
Embodiment 3:
The production of pack for liquids is with embodiment 1, difference is: 1, the preparation of PE layer: PE layer is obtained by the three-layer co-extruded blowing of top layer, middle level and hot sealing layer, top layer adopts metallocene PE and LDPE blended with 4: 1 weight ratios, middle level adopt metallocene PE and LDPE with 3: 1 weight ratio blended after, add the ethylene-propylene copolymer elastomer accounting for middle level gross weight 10% and make.Hot sealing layer (internal layer) adopts the weight ratio of metallocene PE and zinc neutrality vinyl acid copolymer 5: 1 blended.
Embodiment 4:
The production of pack for liquids is with embodiment 1, and difference is: the thickness of PE layer film is 60 μm; Middle level adopt metallocene PE and LDPE with 4: 1 weight ratio blended after, add the ethylene-propylene copolymer elastomer accounting for middle level gross weight 15% and make.
Embodiment 5:
The production of pack for liquids is with embodiment 1, and difference is: the thickness of PE layer film is 120 μm.The raw material physical property selected is as follows: the density of metallocene PE is 0.915-0.925g/cm3, fusing point 118-123 DEG C; The density of described LDPE is 0.920-0.926g/cm3, fusing point 108-112 DEG C; Ethylene contents 8-12% in ethylene-propylene copolymer, density is 0.875-0.882g/cm3, fusing point 95-110 DEG C.
Embodiment 6:
The production of pack for liquids is with embodiment 1, and difference is: described pet layer is one side corona, and thickness is 12 μm, and the thickness of Al layer is 30 μm, and PA layer is two-sided or one side corona, and thickness is 25 μm.
Embodiment 7:
The production of pack for liquids is with embodiment 1, and difference is: described pet layer is one side corona, and thickness is 8 μm, and the thickness of Al layer is 30 μm, and PA layer is two-sided or one side corona, thickness 15 μm.
Embodiment 8:
The production of pack for liquids is with embodiment 1, and difference is: described pet layer is one side corona, and thickness is 21 μm, and the thickness of Al layer is 18 μm, and PA layer is two-sided or one side corona, and thickness is 18 μm.
Embodiment 9:
The production of pack for liquids is with embodiment 1, and difference is: described pet layer is one side corona, and thickness is 2 μm, and the thickness of Al layer is 7 μm, and PA layer is two-sided or one side corona, thickness 12 μm.
To adopting the obtained pack for liquids of the method for embodiment 1 to detect, specific as follows: model specification 350mm × 450mm, PTE12 μm/Al7 μm/PA15 μm/PE100 μm.Test basis: GB9683-1988 " Composite laminated food packaging bag sanitary standard ", GB/T5009.60-2003 " analytical method of food packaging polyethylene, polystyrene, polypropylene products formed sanitary standard ", GB/T6672-2001 " plastic sheeting and Foil thickness measurement mechanical measurement method ", GB/T1040.3-2006 " mensuration the 3rd part of plastic tensile performance: the experimental condition of film and thin slice ", testing result is in table 1.
The product that other embodiment obtains is through inspection, and data are close with table 1, and product all meets GB9683-1988 " Composite laminated food packaging bag sanitary standard ", Q/CXJ016-2012 " high-barrier half high-temp liquid (fruit juice) retort pouch ".
Table 1
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (4)
1. a high-barrier half thermophilic digestion liquid packaging material, stack rear compound from top to bottom by polyester film (PET) layer, aluminium foil (Al) layer, nylon (PA) layer and polyethylene film (PE) layer four-level membrane to make composite membrane, it is characterized in that: described PE layer is obtained by the three-layer co-extruded blowing of top layer, middle level and hot sealing layer, top layer adopts metallocene PE and LDPE to obtain so that the weight ratio of 2-4:1 is blended; Middle level adds the ethylene-propylene copolymer elastomer accounting for middle level gross weight 10%-15% and makes after adopting metallocene PE and LDPE blended with the weight ratio of 3-5:1; The weight ratio of hot sealing layer employing metallocene PE and zinc neutrality vinyl acid copolymer 3-5:1 is blended to be obtained; The density of described metallocene PE is 0.915-0.925g/cm
3, fusing point 118-123 DEG C; The density of described LDPE is 0.920-0.926g/cm
3, fusing point 108-112 DEG C; Ethylene contents 8-12% in ethylene-propylene copolymer, density is 0.875-0.882g/cm
3, fusing point 95-110 DEG C;
In PE layer gross thickness 100%, then the thickness that the thickness on top layer is 25 ± 10%, the thickness in middle level is 50 ± 10%, the thickness of hot sealing layer is 25 ± 10%, PE layer film is 60-120 μm;
The preparation method of described PE layer is as follows:
1) according to proportioning, add top layer raw material in layered material bucket outside, in the hopper of middle level, add middle level raw material, in internal layer hopper, add hot sealing layer raw material;
2), after each hopper mixes respectively, extrude through three-layer co-extruded inflation film manufacturing machine, by outer, in, interiorly three-layer co-extrudedly on die head, blow out the cylinder film that thickness is 120-240 μm;
3) trimming of cylinder film is for subsequent use after separating rolling.
2. a kind of high-barrier half thermophilic digestion liquid packaging material according to claim 1, is characterized in that: in described PE layer, middle level by metallocene PE, LDPE and ethylene-propylene copolymer elastomer blended with the weight ratio of 5:1:1 after make.
3. a kind of high-barrier half thermophilic digestion liquid packaging material according to claim 1, it is characterized in that: described pet layer is single or double corona, thickness is the thickness of 2-21 μm, Al layer is 7-30 μm, PA layer is two-sided or one side corona, and thickness is 12-25 μm.
4. a large-scale pack for liquids, is characterized in that: be obtained through itemize, bag technique by a kind of high-barrier half thermophilic digestion liquid packaging material according to claim 1.
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| CN112959785B (en) * | 2021-03-22 | 2022-11-18 | 四川汇利实业有限公司 | High-barrier PET-Al-PA-PE composite film and preparation method thereof |
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| GB2370808B (en) * | 2001-01-09 | 2003-04-30 | Abdul Aziz Okhai | Laminates and methods for manufacturing the same |
| CN101181948A (en) * | 2007-12-10 | 2008-05-21 | 郭瑞林 | High-barrier thermophilic digestion resistant easy-stripping membrane |
| CN101764199A (en) * | 2010-01-13 | 2010-06-30 | 黄山永新股份有限公司 | High-blocking corrosion-resisting lithium battery composite packaging film and preparation method thereof |
| CN101844642B (en) * | 2010-05-19 | 2012-12-19 | 黄山永新股份有限公司 | Vacuum thermal baffle packaging film and preparation method thereof |
| CN102717573B (en) * | 2012-07-03 | 2015-06-03 | 浙江金石包装有限公司 | Modified polyethylene film and composite film made of same |
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Effective date of registration: 20181225 Address after: 314423 No. 12 Qichao Road, Nongfa District, Chang'an Town, Haining City, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Chengxin Packaging Co., Ltd. Address before: 314423 No. 12 Qichao Road, Haining Agricultural External Comprehensive Development Zone, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Chancing Packaging Materials Co., Ltd. |
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