CN114274625A - High-barrier sheet material suitable for forming, filling and sealing and processing method - Google Patents
High-barrier sheet material suitable for forming, filling and sealing and processing method Download PDFInfo
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- CN114274625A CN114274625A CN202011030261.XA CN202011030261A CN114274625A CN 114274625 A CN114274625 A CN 114274625A CN 202011030261 A CN202011030261 A CN 202011030261A CN 114274625 A CN114274625 A CN 114274625A
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- layer
- barrier sheet
- forming
- high barrier
- sheet material
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- 239000000463 material Substances 0.000 title claims abstract description 21
- 238000011049 filling Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 title abstract description 11
- 238000003672 processing method Methods 0.000 title abstract description 7
- 238000009740 moulding (composite fabrication) Methods 0.000 title description 9
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- -1 polypropylene Polymers 0.000 claims abstract description 18
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims abstract description 13
- 239000004743 Polypropylene Substances 0.000 claims abstract description 12
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims abstract description 12
- 229920005669 high impact polystyrene Polymers 0.000 claims abstract description 11
- 239000004797 high-impact polystyrene Substances 0.000 claims abstract description 11
- 229920001155 polypropylene Polymers 0.000 claims abstract description 9
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 4
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 45
- 239000002994 raw material Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- HGVPOWOAHALJHA-UHFFFAOYSA-N ethene;methyl prop-2-enoate Chemical compound C=C.COC(=O)C=C HGVPOWOAHALJHA-UHFFFAOYSA-N 0.000 claims description 3
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 3
- 239000005043 ethylene-methyl acrylate Substances 0.000 claims description 3
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 3
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002537 cosmetic Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000004698 Polyethylene Substances 0.000 description 4
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000012371 Aseptic Filling Methods 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009448 modified atmosphere packaging Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The invention discloses a high barrier sheet material suitable for forming, filling and sealing and a processing method thereof, wherein the high barrier sheet material comprises a high impact polystyrene layer, a bonding layer, a high barrier EVOH layer, a bonding layer, a low density polyethylene layer and a polypropylene layer from top to bottom, and the total thickness of the high barrier sheet material can be 0.8-2.0 mm. The invention has the following beneficial effects: the sheet has the advantages of high barrier property, deep stretching, thermal stability, heat sealing performance, easy tearing of the seal cover and the like, can be widely applied to the fields of food packaging, daily necessities, medicine packaging or cosmetic packaging and the like, is particularly suitable for an online thermoforming-filling-seal cover production line, and meets the product packaging requirement of about 12 months of shelf life under the normal temperature condition; the forming performance and the barrier performance are considered, and the quality guarantee period of the product is effectively prolonged. Meanwhile, the production process is simple and the cost is low.
Description
Technical Field
The invention relates to the technical field of food packaging, in particular to a high-barrier sheet material suitable for forming, filling and sealing and a processing method thereof.
Background
The packaging container is a necessary article for modern commodities, and particularly for food, the packaging container not only can ensure that the food is not damaged, but also can ensure the safety of the food in the box and ensure the sanitation of the food. For food to be transported for a long distance, the vacuum packaging container is isolated from the outside air, so that the food is packaged as fresh and safe as possible, and great convenience is provided for daily life of people.
Ethylene-vinyl alcohol copolymer, EVOH for short, is a new type of high-barrier material, and its gas-barrier property is 10000 times higher than that of PE (polyethylene) and PP (polypropylene), and several times higher than that of current commonly-used barrier material PVDC (polyvinylidene chloride), so that it is the optimum different-barrier plastic found in the world at present. EVOH is used as a packaging material, has excellent barrier property and odor barrier property to gases such as oxygen, carbon dioxide and the like, has super-high oil resistance, organic solvent resistance and other properties, and can be applied to packaging in the fields of food, medicines and the like because EVOH is non-toxic, free of pungent odor and environment-friendly. However, EVOH is relatively expensive and poor in impact resistance, and thus limits the application range to a certain extent.
Research shows that EVOH can be mixed with packaging materials such as PE, PA (polyamide), PP and the like to realize advantage complementation and form composite materials with better barrier effect, but the composite materials are still less than ideal in the performances of easy uncovering, high-temperature steaming resistance, high barrier property and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a high barrier sheet material suitable for forming, filling and sealing and a processing method thereof, so that the high barrier sheet material can be conveniently used for food processing application of normal-temperature storage modified atmosphere packaging and hot filling in a long shelf life.
The purpose of the invention is realized by the following technical scheme:
a high barrier sheet material suitable for forming, filling and sealing, has a total thickness of 0.8-2.0mm, comprises from top to bottom,
a high impact polystyrene layer, 0.71-1.51mm,
a tie layer, 0.025mm,
a high barrier EVOH layer of 0.04-0.08mm,
a tie layer, 0.025mm,
a low density polyethylene layer, 0.06-0.2mm,
polypropylene layer, 0.05-0.1 mm.
Preferably, the high impact polystyrene layer is prepared by mixing high impact polystyrene master batch and titanium dioxide, and the mass ratio of the two is (80-98): (2-20).
Preferably, the ethylene content in the high-barrier EVOH layer is 25-45%.
Preferably, the adhesive layer is at least one of maleic anhydride modified polypropylene, maleic anhydride modified ethylene-acrylate, ethylene methyl acrylate, maleic anhydride modified ethylene octene copolymer, maleic anhydride modified ethylene vinyl acetate, and anhydride modified linear low density polyethylene.
The invention relates to a processing method of a high barrier sheet material suitable for forming, filling and sealing, which comprises the following steps,
preparing and weighing raw materials, namely preparing raw material particles according to components of a six-layer structure of the multilayer co-extrusion high-barrier sheet, and respectively sending the raw material particles into corresponding hoppers through a material suction device and a weighing device;
a step of shearing and heating of the extruders, in which the five extruders respectively shear and heat raw material particles in the charging hoppers of the extruders to obtain raw materials in a molten state, and the raw materials are conveyed to a die head through a port, wherein the adhesive material is extruded by one extrusion screw and divided into two layers;
and (3) a bonding synthesis step, namely, after all the layers enter a layer combining device at the same time, arranging the layers according to the layer structure requirement and reaching a preset thickness range to form the high-barrier sheet.
Preferably, the surface of the obtained high barrier sheet is subjected to polishing or matte treatment.
The invention has the following beneficial effects: the sheet has the advantages of high barrier property, deep stretching, thermal stability, heat sealing performance, easy tearing of the seal cover and the like, can be widely applied to the fields of food packaging, daily necessities, medicine packaging or cosmetic packaging and the like, is particularly suitable for an online thermoforming-filling-seal cover production line, and meets the product packaging requirement of about 12 months of shelf life under the normal temperature condition; under the aseptic condition, the polypropylene layer PP at the outermost layer can be very easily peeled or torn off before aseptic filling, so that the polyethylene layer and food contents are directly treated, the cleaning and disinfection treatment link of packaging sheets or containers is reduced, the energy consumption is saved or the use of disinfection chemicals is reduced, and the purposes of saving energy or protecting the environment are achieved; the forming performance and the barrier performance are considered, and the quality guarantee period of the product is effectively prolonged. Meanwhile, the production process is simple and the cost is low.
Detailed Description
The invention discloses a high barrier sheet material suitable for forming, filling and sealing, the total thickness of which can reach 0.8-2.0mm (the thickness of 1.7mm is taken as an example for illustration), and the high barrier sheet material comprises the following components from top to bottom:
a high impact polystyrene layer, 1.31mm,
a tie layer, 0.025mm,
a high barrier EVOH layer, 0.06mm,
a tie layer, 0.025mm,
a heat-sealable low density polyethylene layer, 0.18mm,
clean peelable polypropylene layer, 0.1 mm.
The total thickness is formed to be 1.7mm + -0.05 mm.
The high impact polystyrene layer is prepared from a high impact polystyrene master batch and titanium dioxide mixed raw material, and the mass ratio of the two is (80-98): (2-20), the high impact polystyrene is 476L model number of Yangze Basff company, and/or 484H model number of Dow company in America.
The ethylene content in the high-barrier EVOH layer is 25-45%.
The adhesive layer is at least one of maleic anhydride modified polypropylene, maleic anhydride modified ethylene-acrylate, ethylene methyl acrylate, maleic anhydride modified ethylene octene copolymer, maleic anhydride modified ethylene vinyl acetate and anhydride modified linear low density polyethylene.
The invention relates to a processing method of a high barrier sheet material suitable for forming, filling and sealing, which comprises the following steps,
preparing and weighing raw materials, namely preparing raw material particles according to components of a six-layer structure of the multilayer co-extrusion high-barrier sheet, and respectively sending the raw material particles into corresponding hoppers through a material suction device and a weighing device;
a step of shearing and heating of the extruders, in which the five extruders respectively shear and heat raw material particles in the charging hoppers of the extruders to obtain raw materials in a molten state, and the raw materials are conveyed to a die head through a port, wherein the adhesive material is extruded by one extrusion screw and divided into two layers;
and (3) a bonding synthesis step, namely, after all the layers enter a layer combining device at the same time, arranging the layers according to the layer structure requirement and reaching a preset thickness range to form the high-barrier sheet.
Preferably, the surface of the obtained high barrier sheet is subjected to polishing or matte treatment.
The structure of the extruder is consistent, and the temperatures of a feed opening, a first heating zone, a second heating zone, a third heating zone, a fourth heating zone, a fifth heating zone and a die head of each extruder are respectively as follows:
a first extruder at 50 ℃, 215 ℃, 220 ℃;
a second extruder at 190 ℃, 220 ℃, 230 ℃ and 230 ℃;
a third extruder at 190 ℃, 210 ℃, 215 ℃, 220 ℃;
a fourth extruder at 50 ℃, 140 ℃, 180 ℃, 200 ℃;
a fifth extruder at 190 ℃, 215 ℃.
Sheet properties were tested as follows:
shrinkage <10% in MD, Test 30minutes @130 ℃;
density 1.0+/-0.1 g/cc;
oxygen barrier, calibrated OTR 0.3-0.9 cc/m2/day bar @20 deg.C, 65% RH;
moisture barrier calibrated WVTR 0.7-1.4 cc/m2/day bar @38 deg.C, 90% RH.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. High separation sheet suitable for shaping filling seals, its characterized in that: the total thickness is 0.8-2.0mm, the device comprises from top to bottom,
a high impact polystyrene layer, 0.71-1.51mm,
a tie layer, 0.025mm,
a high barrier EVOH layer of 0.04-0.08mm,
a tie layer, 0.025mm,
a low density polyethylene layer, 0.06-0.2mm,
polypropylene layer, 0.05-0.1 mm.
2. The high barrier sheet suitable for forming a pour-closure of claim 1, wherein: the high impact polystyrene layer is prepared from a high impact polystyrene master batch and titanium dioxide mixed raw material, and the mass ratio of the two is (80-98): (2-20).
3. The high barrier sheet suitable for forming a pour-closure of claim 1, wherein: the ethylene content in the high-barrier EVOH layer is 25-45%.
4. The high barrier sheet suitable for forming a pour-closure of claim 1, wherein: the adhesive layer is at least one of maleic anhydride modified polypropylene, maleic anhydride modified ethylene-acrylate, ethylene methyl acrylate, maleic anhydride modified ethylene octene copolymer, maleic anhydride modified ethylene vinyl acetate and anhydride modified linear low density polyethylene.
5. The method of forming a high barrier sheet suitable for use in forming a fill seal of claim 1 including the steps of,
preparing and weighing raw materials, namely preparing raw material particles according to components of a six-layer structure of the multilayer co-extrusion high-barrier sheet, and respectively sending the raw material particles into corresponding hoppers through a material suction device and a weighing device;
a step of shearing and heating of the extruders, in which the five extruders respectively shear and heat raw material particles in the charging hoppers of the extruders to obtain raw materials in a molten state, and the raw materials are conveyed to a die head through a port, wherein the adhesive material is extruded by one extrusion screw and divided into two layers;
and (3) a bonding synthesis step, namely, after all the layers enter a layer combining device at the same time, arranging the layers according to the layer structure requirement and reaching a preset thickness range to form the high-barrier sheet.
6. The process according to claim 5, wherein the surface of the obtained high barrier sheet is subjected to polishing or matte treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030261.XA CN114274625A (en) | 2020-09-27 | 2020-09-27 | High-barrier sheet material suitable for forming, filling and sealing and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030261.XA CN114274625A (en) | 2020-09-27 | 2020-09-27 | High-barrier sheet material suitable for forming, filling and sealing and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114274625A true CN114274625A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011030261.XA Pending CN114274625A (en) | 2020-09-27 | 2020-09-27 | High-barrier sheet material suitable for forming, filling and sealing and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114274625A (en) |
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2020
- 2020-09-27 CN CN202011030261.XA patent/CN114274625A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220405 |
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| WD01 | Invention patent application deemed withdrawn after publication |