CN103331969A - Multi-layer co-extruded two-way stretching poultry meat packaging shrink film and preparation method thereof - Google Patents
Multi-layer co-extruded two-way stretching poultry meat packaging shrink film and preparation method thereof Download PDFInfo
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- CN103331969A CN103331969A CN2013102280680A CN201310228068A CN103331969A CN 103331969 A CN103331969 A CN 103331969A CN 2013102280680 A CN2013102280680 A CN 2013102280680A CN 201310228068 A CN201310228068 A CN 201310228068A CN 103331969 A CN103331969 A CN 103331969A
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- 229920006300 shrink film Polymers 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 235000013594 poultry meat Nutrition 0.000 title abstract description 30
- 238000004806 packaging method and process Methods 0.000 title abstract description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 54
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 54
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 52
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 52
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 22
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 244000144977 poultry Species 0.000 claims description 29
- 238000012856 packing Methods 0.000 claims description 27
- 238000001125 extrusion Methods 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000035699 permeability Effects 0.000 abstract description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006353 environmental stress Effects 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 235000013613 poultry product Nutrition 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a multi-layer co-extruded two-way stretching poultry meat packaging shrink film and a preparation method thereof. The total thickness of the shrink film is 0.03mm-0.10mm, and is formed by co-extruding three layers, wherein the first layer is a mixture of ethylene vinyl acetate copolymer EVA and linear low-density polyethylene LLDPE; the second layer is ethylene vinyl acetate copolymer EVA; the third layer is a mixture of the linear low-density polyethylene LLDPE and low-density polyethylene LDPE. The materials of each layer are added to each-layer extruder for being molten and plasticized; the materials are extruded by a mould to form a multi-layer mould blank; the multi-layer mould blank is heated up, blown up, two-way stretched, and cooled, and the finished product is rolled after the needed folding diameter and shrinkage rate are achieved. The multi-layer co-extruded two-way stretching poultry meat packaging shrink film and the preparation method thereof have the beneficial effects that the poultry meat packaging shrink film has high shrinkage and high air permeability, can be used for keeping the performance that the bloody water of the poultry meat is not leaked, so that the bloody water can be prevented from leaking outsides to the greatest extent, and the bag is prevented from being frosted, dehydrated and dried, and therefore, the best retail appearance, sanitary quality and a longer storage period of the poultry meat product can be kept.
Description
Technical field
The present invention relates to a kind of multi-layer co-extrusion two-way stretching poultry packing shrink film and preparation method thereof, this shrink wrap is mainly used in frozen product packing, fresh poultry packing etc.
Background technology
Meat product moves towards last link in market and packs exactly.Fresh poultry is wet usually to stick, has peculiar smell, difficult storage to preserve, the simplest nailing polybag and PVC pallet are cut the chicken packing from the beginning, though can significantly reduce the secondary pollution that causes when peddling with retail transporting, also improve the sanitary condition of the fresh poultry of retail really effectively.But simple retail packaging, have only at the omnidistance temperature keyholed back plate of strictness and transport carefully under the process, could keep its outward appearance and quality reluctantly, can not satisfy the needs of retail market, because this packaged form is easy to owing to for the moment inconsiderate consumer of generation of keyholed back plate and the unacceptable watery blood in the retail commercial city phenomenon that leaks outside, also be not suitable as simultaneously the packing of frozen product, the pot-life is also shorter relatively.
Summary of the invention
An object of the present invention is to provide a kind of high contraction, high ventilative, water retention property is good and multi-layer co-extrusion two-way stretching poultry environmental protection again is packed shrink film and preparation method thereof.
The technical solution used in the present invention is:
Multi-layer co-extrusion two-way stretching poultry packing shrink film, this shrink film gross thickness is 0.03mm-0.10mm, this shrink film is three-layer co-extruded forming; Ground floor is the mixture of ethylene-vinyl acetate copolymer EVA, LLDPE LLDPE, and its thickness accounts for total film thickness 10-50%; The second layer is ethylene-vinyl acetate copolymer EVA, and its thickness accounts for total film thickness 10-50%, and the 3rd layer is the mixture of LLDPE LLDPE and low density polyethylene, and its thickness accounts for total film thickness 10-50%.
The percentage by weight of the mixture of described ground floor ethylene-vinyl acetate copolymer EVA, LLDPE LLDPE is (75-90) %:(10-25) %.
The percentage by weight of the mixture of described the 3rd layer line low density polyethylene (LDPE) LLDPE and low density polyethylene is (55-90) %:(10-45) %.
The preparation method of multi-layer co-extrusion two-way stretching poultry packing shrink film is characterized in that, may further comprise the steps:
Multi-layer co-extrusion two-way stretching poultry packing shrink film is three layers of raw material co-extrusion, ground floor is that percentage by weight is (75-90) %:(10-25) the ethylene-vinyl acetate copolymer EVA of % and percentage by weight be the mixture of (10-25) % LLDPE LLDPE, the second layer is that percentage by weight is 100% ethylene-vinyl acetate copolymer EVA, the 3rd layer is that percentage by weight is that (55-90) % LLDPE LLDPE and percentage by weight are the mixture of (10-45) % low density polyethylene, each layer raw material added each layer extruder respectively carry out the melting plasticizing, extrude by mould then, form a multilayer film base, the film base is used 5-10 ℃ of cooling water cooling forming rapidly immediately, enter hot water storgae or infrared heating system again and be heated to 80-100 ℃ inflation temperature, charging into compressed air makes the film base carry out cross directional stretch 3-5 times multiplying power, longitudinal stretching 2.5-3 times multiplying power, enter the processing of finalizing the design of infrared cartridge heater again, vane is cooled to needed folding footpath 150-500mm, behind the shrinkage factor 30-50%, the finished product rolling.
Beneficial effect of the present invention: poultry that technology of the present invention prepares packing shrink film have highly shrink, high ventilative, can keep the personality energy of the unlikely seepage of poultry watery blood, farthest prevent leaking outside of watery blood, requirement such as avoid frosting in the bag, dehydrate; Can make fresh-keeping poultry product keep best retail outward appearance, hygienic quality and the longer pot-life.
The specific embodiment
Following examples are intended to illustrate the present invention rather than limitation of the invention further.
The preparation method of multi-layer co-extrusion two-way stretching poultry packing shrink film, the specific embodiment.
Embodiment 1
Multi-layer co-extrusion two-way stretching poultry packing shrink film, this shrink film gross thickness is 0.05mm, this shrink film is three-layer co-extruded forming; , the mixture of the ethylene-vinyl acetate copolymer EVA of ground floor 80% weight, 20% weight LLDPE LLDPE, its thickness is 0.01mm; The second layer is the ethylene-vinyl acetate copolymer EVA of 100% weight, and its thickness is 0.02mm, the mixture of the LLDPE LLDPE of the 3rd layer of 90% weight and the low density polyethylene of 10% weight, and its thickness is 0.02 mm.
The preparation method of multi-layer co-extrusion two-way stretching poultry packing shrink film may further comprise the steps:
Multi-layer co-extrusion two-way stretching poultry packing shrink film is three layers of raw material co-extrusion, ground floor is that percentage by weight is that 80% ethylene-vinyl acetate copolymer EVA and percentage by weight are the mixture of 20% LLDPE LLDPE, the second layer is that percentage by weight is 100% ethylene-vinyl acetate copolymer EVA, the 3rd layer is that percentage by weight is that 90% LLDPE LLDPE and percentage by weight are the mixture of 10% low density polyethylene, each layer raw material added each layer extruder respectively carry out the melting plasticizing, extrude by mould then, form a multilayer film base, the film base is used 5 ℃ of cooling waters cooling forming rapidly immediately, enter hot water storgae or infrared heating system again and be heated to 80 ℃ inflation temperature, charging into compressed air makes the film base carry out 3 times of multiplying powers of cross directional stretch, 2.5 times of multiplying powers of longitudinal stretching, enter the processing of finalizing the design of infrared cartridge heater again, vane is cooled to needed folding footpath 150 mm, after the shrinkage factor 30%, the finished product rolling.
Embodiment 2
Multi-layer co-extrusion two-way stretching poultry packing shrink film, this shrink film gross thickness is 0.065mm, this shrink film is three-layer co-extruded forming, the mixture of the ethylene-vinyl acetate copolymer EVA of ground floor 90% weight, 10% weight LLDPE LLDPE, and its thickness is 0.02mm; The second layer is the ethylene-vinyl acetate copolymer EVA of 100% weight, and its thickness is 0.025mm, the mixture of the LLDPE LLDPE of the 3rd layer of 75% weight and the low density polyethylene of 25% weight, and its thickness is 0.02 mm.
The preparation method of multi-layer co-extrusion two-way stretching poultry packing shrink film may further comprise the steps:
Multi-layer co-extrusion two-way stretching poultry packing shrink film is three layers of raw material co-extrusion, ground floor is that percentage by weight is that 90% ethylene-vinyl acetate copolymer EVA and percentage by weight are the mixture of 10% LLDPE LLDPE, the second layer is that percentage by weight is 100% ethylene-vinyl acetate copolymer EVA, the 3rd layer is that percentage by weight is that 75% LLDPE LLDPE and percentage by weight are the mixture of 25% low density polyethylene, each layer raw material added each layer extruder respectively carry out the melting plasticizing, extrude by mould then, form a multilayer film base, the film base is used 10 ℃ of cooling waters cooling forming rapidly immediately, enter hot water storgae or infrared heating system again and be heated to 90 ℃ inflation temperature, charging into compressed air makes the film base carry out 4 times of multiplying powers of cross directional stretch, 2.8 times of multiplying powers of longitudinal stretching, enter the processing of finalizing the design of infrared cartridge heater again, it is 350mm that vane is cooled to needed folding footpath, after the shrinkage factor 40%, the finished product rolling.
Embodiment 3
Multi-layer co-extrusion two-way stretching poultry packing shrink film, this shrink film gross thickness is 0.08mm, and this shrink film is three-layer co-extruded forming, the mixture of the ethylene-vinyl acetate copolymer EVA of ground floor 75% weight, 25% weight LLDPE LLDPE, its thickness are 0.02 mm; The second layer is the ethylene-vinyl acetate copolymer EVA of 100% weight, and its thickness is 0.003mm, the mixture of the LLDPE LLDPE of the 3rd layer of 55% weight and the low density polyethylene of 45% weight, and its thickness is 0.03mm.
The preparation method of multi-layer co-extrusion two-way stretching poultry packing shrink film may further comprise the steps:
Multi-layer co-extrusion two-way stretching poultry packing shrink film is three layers of raw material co-extrusion, ground floor is that percentage by weight is that 90% ethylene-vinyl acetate copolymer EVA and percentage by weight are the mixture of 10% LLDPE LLDPE, the second layer is that percentage by weight is 100% ethylene-vinyl acetate copolymer EVA, the 3rd layer is that percentage by weight is that 75% LLDPE LLDPE and percentage by weight are the mixture of 25% low density polyethylene, each layer raw material added each layer extruder respectively carry out the melting plasticizing, extrude by mould then, form a multilayer film base, the film base is used 15 ℃ of cooling waters cooling forming rapidly immediately, enter hot water storgae or infrared heating system again and be heated to 910 ℃ inflation temperature, charging into compressed air makes the film base carry out 5 times of multiplying powers of cross directional stretch, 3 times of multiplying powers of longitudinal stretching, enter the processing of finalizing the design of infrared cartridge heater again, it is 500mm that vane is cooled to needed folding footpath, after the shrinkage factor 50%, the finished product rolling.
Ethylene-vinyl acetate copolymer EVA, relative density 0.92～0.98g/cm3, EVA has good resistance to low temperature, and along with the increase of molecular weight, the softening point of EVA rises, EVA is owing to introduced VAM in strand, thereby reduced high-crystallinity, improved pliability, impact resistance and heat seal performance, performance improvement mainly is aspects such as elasticity, flexibility, glossiness, gas permeability, in addition, its environmental stress crack resistance is improved.In general, the performance of EVA resin depends primarily on the content of vinyl acetate on the strand, less than 1, is first-selected in melt index in the scope of vinyl acetate 6% to 12%.
LLDPE LLDPE, be that ethene and a small amount of high alpha-olefin (as butene-1, hexene-1, octene-1, tetramethyl amylene-1 etc.) are under catalyst action, a kind of copolymer that forms through high pressure or low-pressure polymerization, density is in 0.915～0.9 g/cm3, have advantages such as intensity is big, good toughness, rigidity is big, heat-resisting, cold resistance is good, also has good environmental stress crack resistance, performances such as impact strength, tear-resistant intensity.In general, selecting melt flow rate (MFR) is that the polyolefin of 1-3g/10min is comparatively suitable.
Low density polyethylene normally is monomer with ethene, and density is 0. 910～0. 925 g/cm3, and length literary composition chain is arranged on the low density polyethylene (LDPE) strand.Degree of crystallinity is lower, and molecular weight is general 5～500,000, and it is the waxy solid resin that a kind of milky is translucent, and is nontoxic.Softening point is lower, and surpassing softening point is fusion, and its thermal welding, moulding processability are fine, flexibility is good, and toughness, lower temperature resistance are fine, can be-60 ℃～-80 ℃ work down, the mechanical strength of LDPE is relatively poor, and hear resistance is not high, and environmental stress crack resistance is poor.Water imbibition is very low, and suction hardly is big to CO2, organic property foul smell permeability, but to the poor permeability of water vapour, air.In general, selecting melt flow rate (MFR) is that the polyolefin of 1-3g/10min is comparatively suitable.
The poultry packing shrink film that technology of the present invention prepares has high heat-shrinkable, and highly-breathable, water-retaining property have longer shelf life.Detect for these properties of product as following table: (examination criteria: O2 GB/T1038-2000; H2O GB/T1037-1988)
Can satisfy the packing demand of various refrigerated products, poultry; particularly be suitable for fresh poultry packaging product packing; can anti-leak outside, external force resistance, can print; can provide the better protect environment to product; guarantee that product enters behind the supermarket and do not have watery blood water clock everywhere on the shelf, helps the supermarket to keep clean back shop stock environment.Can provide the packaging bag of different colours according to the different requirements of client, as white, cream color, yellow etc., and join printing.
Claims (4)
1. multi-layer co-extrusion two-way stretching poultry packing shrink film is characterized in that this shrink film gross thickness is 0.03mm-0.10mm, and this shrink film is three-layer co-extruded forming; Wherein ground floor is the mixture of ethylene-vinyl acetate copolymer EVA, LLDPE LLDPE, and its thickness accounts for total film thickness 10-50%; The second layer is ethylene-vinyl acetate copolymer EVA, and its thickness accounts for total film thickness 10-50%; The 3rd layer is the mixture of LLDPE LLDPE and low density polyethylene, and its thickness accounts for total film thickness 10-50%.
2. multi-layer co-extrusion two-way stretching poultry according to claim 1 is packed shrink film, it is characterized in that the percentage by weight of the mixture of described ground floor ethylene-vinyl acetate copolymer EVA, LLDPE LLDPE is (75-90) %:(10-25) %.
3. multi-layer co-extrusion two-way stretching poultry packing shrink film according to claim 1 is characterized in that the percentage by weight of the mixture of described the 3rd layer line low density polyethylene (LDPE) LLDPE and low density polyethylene is (55-90) %:(10-45) %.
4. according to the preparation method of the described multi-layer co-extrusion two-way stretching poultry packing of claim 1 shrink film, it is characterized in that, may further comprise the steps:
Multi-layer co-extrusion two-way stretching poultry packing shrink film is three layers of raw material co-extrusion, ground floor is that percentage by weight is (75-90) %:(10-25) the ethylene-vinyl acetate copolymer EVA of % and percentage by weight be the mixture of (10-25) % LLDPE LLDPE, the second layer is that percentage by weight is 100% ethylene-vinyl acetate copolymer EVA, the 3rd layer is that percentage by weight is that (55-90) % LLDPE LLDPE and percentage by weight are the mixture of (10-45) % low density polyethylene, each layer raw material added each layer extruder respectively carry out the melting plasticizing, extrude by mould then, form a multilayer film base, the film base is used 5-10 ℃ of cooling water cooling forming rapidly immediately, enter hot water storgae or infrared heating system again and be heated to 80-100 ℃ inflation temperature, charging into compressed air makes the film base carry out cross directional stretch 3-5 times multiplying power, longitudinal stretching 2.5-3 times multiplying power, enter the processing of finalizing the design of infrared cartridge heater again, vane is cooled to needed folding footpath 150-500mm, behind the shrinkage factor 30-50%, the finished product rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310228068.0A CN103331969B (en) | 2013-06-09 | 2013-06-09 | Multi-layer co-extruded two-way stretching poultry meat packaging shrink film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310228068.0A CN103331969B (en) | 2013-06-09 | 2013-06-09 | Multi-layer co-extruded two-way stretching poultry meat packaging shrink film and preparation method thereof |
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| CN103331969A true CN103331969A (en) | 2013-10-02 |
| CN103331969B CN103331969B (en) | 2017-02-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612838A (en) * | 2013-12-12 | 2014-03-05 | 江苏优珀斯材料科技有限公司 | Waterproof breathable packing container |
| CN104002528A (en) * | 2014-05-26 | 2014-08-27 | 上海海洋大学 | Food adsorption and antibacterial pad and preparation method thereof |
| CN110978702A (en) * | 2019-11-29 | 2020-04-10 | 江门市蓬江区华龙包装材料有限公司 | Heat shrinkable film and preparation method and application thereof |
| CN111331980A (en) * | 2020-03-19 | 2020-06-26 | 青岛海益塑业有限责任公司 | Low-melting-point film, preparation method and application thereof |
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| US4495249A (en) * | 1982-02-19 | 1985-01-22 | Kureha Kagaku Kogyo Kabushiki Kaisha | Heat shrinkable multi-layered laminate film |
| JPH05124160A (en) * | 1991-10-31 | 1993-05-21 | Mitsubishi Kasei Corp | Freshness keeping film |
| CN101378902A (en) * | 2006-02-02 | 2009-03-04 | 巴塞尔聚烯烃股份有限公司 | Multilayer thermoshrinkable films |
| CN202337038U (en) * | 2011-12-05 | 2012-07-18 | 惠州宝柏包装有限公司 | Polyethylene film with resealing function |
| CN102615836A (en) * | 2012-04-01 | 2012-08-01 | 南通环球塑料工程有限公司 | Preparation method for multi-layer co-extrusion two-way stretched high-barrier plastic casing |
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2013
- 2013-06-09 CN CN201310228068.0A patent/CN103331969B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495249A (en) * | 1982-02-19 | 1985-01-22 | Kureha Kagaku Kogyo Kabushiki Kaisha | Heat shrinkable multi-layered laminate film |
| JPH05124160A (en) * | 1991-10-31 | 1993-05-21 | Mitsubishi Kasei Corp | Freshness keeping film |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612838A (en) * | 2013-12-12 | 2014-03-05 | 江苏优珀斯材料科技有限公司 | Waterproof breathable packing container |
| CN103612838B (en) * | 2013-12-12 | 2016-01-20 | 江苏优珀斯材料科技有限公司 | A kind of packing chest of waterproof and breathable |
| CN104002528A (en) * | 2014-05-26 | 2014-08-27 | 上海海洋大学 | Food adsorption and antibacterial pad and preparation method thereof |
| CN110978702A (en) * | 2019-11-29 | 2020-04-10 | 江门市蓬江区华龙包装材料有限公司 | Heat shrinkable film and preparation method and application thereof |
| CN111331980A (en) * | 2020-03-19 | 2020-06-26 | 青岛海益塑业有限责任公司 | Low-melting-point film, preparation method and application thereof |
Also Published As
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| CN103331969B (en) | 2017-02-15 |
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