CN219856322U - Composite sheet for cheese packaging - Google Patents
Composite sheet for cheese packaging Download PDFInfo
- Publication number
- CN219856322U CN219856322U CN202122552834.1U CN202122552834U CN219856322U CN 219856322 U CN219856322 U CN 219856322U CN 202122552834 U CN202122552834 U CN 202122552834U CN 219856322 U CN219856322 U CN 219856322U
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- CN
- China
- Prior art keywords
- layer
- composite sheet
- polyolefin layer
- polyolefin
- cheese
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 235000013351 cheese Nutrition 0.000 title claims abstract description 36
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 93
- 229920000098 polyolefin Polymers 0.000 claims abstract description 47
- 230000004888 barrier function Effects 0.000 claims abstract description 13
- 239000002981 blocking agent Substances 0.000 claims abstract description 9
- 238000007639 printing Methods 0.000 claims abstract description 7
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 13
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 239000004793 Polystyrene Substances 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 239000004800 polyvinyl chloride Substances 0.000 claims description 8
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical group C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 7
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 7
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 7
- 239000005025 cast polypropylene Substances 0.000 claims description 6
- 229920006267 polyester film Polymers 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 229920008651 Crystalline Polyethylene terephthalate Polymers 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 238000002564 cardiac stress test Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 9
- 239000000047 product Substances 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 240000002129 Malva sylvestris Species 0.000 description 5
- 235000006770 Malva sylvestris Nutrition 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000012752 auxiliary agent Substances 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004595 color masterbatch Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 1
- 239000003738 black carbon Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010494 opalescence Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The utility model provides a composite sheet for cheese packaging, which at least comprises a base layer, a first connecting layer, a polyolefin layer, a second connecting layer, a printing layer and a surface layer from bottom to top; the base layer at least comprises a first polyolefin layer, a barrier layer and a second polyolefin layer from top to bottom; and the polyolefin layer is at least added with a light blocking agent. The cheese packaging sheet meets the requirements of storing cheese at normal temperature in the aspects of moisture permeability, oxygen permeability and light resistance, and achieves the purposes of storing, transporting and selling cheese at normal temperature; in addition, by adding a white color master, the appearance is exquisite.
Description
Technical Field
The utility model relates to a ready-to-eat cheese package.
Background
Currently, popular instant cheeses on the market are mainly classified into refrigerated cheeses and normal temperature cheeses, and the refrigerated cheeses are hard in storage, transportation and sales, and have short shelf life due to severe requirements on light shielding and temperature (2-6 ℃) of the environment. For the cheese at normal temperature, the packaging requirement is strict, and the taste of the cheese is affected due to the fact that the cheese is easy to lose water and volatilize; if the oxygen permeability of the package is high, cheese microorganisms grow too fast and are easy to deteriorate; in addition, ultraviolet rays can cause deterioration in cheese; therefore, the normal temperature cheese package has high performance requirements on moisture permeability, oxygen permeability (microorganisms) and light transmittance (less than 0.1 percent), but the conventional package is difficult to meet the packaging requirements of normal temperature cheese.
Disclosure of Invention
Based on the technical problems, the utility model provides a composite sheet for cheese packaging, which at least comprises a base layer, a first connecting layer, a polyolefin layer, a second connecting layer, a printing layer and a surface layer from bottom to top; the base layer at least comprises a first polyolefin layer, a barrier layer and a second polyolefin layer from top to bottom; and the polyolefin layer is at least added with a light blocking agent.
In some embodiments, the barrier layer is made of EVOH (ethylene-vinyl alcohol copolymer), preferably, the thickness of the EVOH (ethylene-vinyl alcohol copolymer) is 10-30% of the base layer.
In some embodiments, the facing is selected from BOPET (biaxially oriented polyester film) or CPP (cast polypropylene) or CPET (unstretched polyester) film.
In some embodiments, the polyolefin layer is selected from PVC (polyvinyl chloride), PS (polystyrene) or PP (polypropylene) sheets.
In some embodiments, the polyolefin layer is further added with an ultraviolet absorber.
In some embodiments, the first and second tie layers are adhesive layers.
In some embodiments the polyolefin layer is added with white color master on the upper and lower sides.
In some embodiments, the polyolefin layer has a thickness in the range of 0.15 to 0.30mm.
In some embodiments, the second polyolefin layer comprises a release layer.
In some embodiments, the first polyolefin layer, the barrier layer, and the second polyolefin layer are laminated by multilayer coextrusion.
The cheese packaging sheet meets the requirements of storing cheese at normal temperature in the aspects of moisture permeability, oxygen permeability and light resistance, and achieves the purposes of storing, transporting and selling cheese at normal temperature; in addition, by adding a white color master, the appearance is exquisite.
The sheet provided by the utility model is convenient, quick, sanitary, quantitative, exquisite in appearance, easy to shape, and convenient for product storage, transportation and sales.
Drawings
Fig. 1 is a schematic structural view of a composite sheet for cheese packaging provided by the utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, the present embodiment provides a composite sheet for cheese packaging, which includes, from bottom to top, at least a base layer 1, a first connection layer 2, a polyolefin layer 3, a second connection layer 4, a printing layer 5, and a surface layer 6;
the base layer 1 at least comprises a first polyolefin layer 11, a barrier layer 12 and a second polyolefin layer 13 from top to bottom, wherein the barrier layer 12 can block the permeation of water vapor and oxygen, so that the problem of cheese deterioration caused by water vapor and oxygen is effectively avoided;
since cheeses and dairy products are susceptible to microorganisms, the requirements for moisture and oxygen permeation are extremely stringent, and in some preferred embodiments, the barrier layer is of EVOH (ethylene vinyl alcohol copolymer); as a preferred embodiment, the interlayer thickness of the EVOH layer accounts for 10-30% of that of the base layer, and is too thin to meet the barrier requirement, and too thick, the cost is increased; in this example, EVOH was used to form the barrier layer, and the oxygen transmission rate of the finished product was 1.0cm or less 3 /m 2 24h.0.1mpa (test conditions: 23 ℃ C./0% RH), water vapor transmission rate of 3g/m or less 2 24h (test conditions: 38 ℃ C./90% RH).
The first polyolefin layer 11 is made of polyethylene; optionally, the second polyolefin layer 13 forms a release layer, and the first polyolefin layer 11, the barrier layer 12 and the release layer 13 are laminated by multilayer coextrusion; in this embodiment, the easy-to-release layer is selected from ethylene-butene copolymer or ethylene-vinyl alcohol copolymer.
Further, the polyolefin layer 3 provided in this embodiment is at least added with a light blocking agent, and the polyolefin layer has a certain thickness as a main body layer of the sheet, and at this time, the light blocking agent is added therein to effectively block light from penetrating through the sheet, so as to solve the problem of cheese deterioration caused by ultraviolet rays; in other embodiments, the polyolefin layer is further added with an ultraviolet absorber; for example, in the processing and production process of the polyolefin layer sheet of the normal temperature cheese packaging sheet, a multilayer coextrusion process technology is adopted, and a gray or black carbon black material with high light blocking performance is adopted in the middle layer of the sheet, namely the polyolefin layer, and an ultraviolet absorbent is added to achieve the technical performance of preventing common light from transmitting.
Furthermore, a certain amount of white color master batches containing titanium dioxide are filled on the upper side and the lower side of the polyolefin layer to increase Bai Zuguang, and the visual effects of setting off the printed color of the surface layer and the opalescence and cleanness of the inner side are achieved.
The addition of a light blocking agent, a light blocking agent and an ultraviolet absorber, a light blocking agent, an ultraviolet absorber and a white color master to the polyolefin layer 3 is a known method; specifically, the light blocking agent: the medium pigment carbon black, carrier resin and auxiliary agent are processed into granular coloring master batches with the diameter of about 2.5MM (pigment carbon black is produced by a furnace black production process conventionally), and the medium pigment carbon black, carrier resin and auxiliary agent are mainly used for effectively blocking light rays with the diameter of 200nm-780 nm.
Ultraviolet absorber: the main structure is benzotriazole (UV-P) or benzophenone (UV-0) which are used together with carbon black pigment to improve the light blocking effect.
White color master batch: the titanium dioxide/carrier resin/auxiliary agent composite material is processed by titanium dioxide/carrier resin/auxiliary agent, and has the main effects of improving the beautiful effect of the product, providing clean feeling for consumers and also playing a role in setting off the aesthetic feeling of printed pictures and texts.
Further, the polyolefin layer 3 is selected from PVC (polyvinyl chloride), PS (polystyrene) or PP (polypropylene) sheets; specifically, the thickness of the polyolefin layer ranges from 0.15 mm to 0.30mm, and the polyolefin layer is classified into a normal temperature type and a refrigeration type according to different storage and transportation and sales conditions of the end product.
Illustratively, the light transmittance of the PVC (polyvinyl chloride), PS (polystyrene) or PP (polypropylene) sheet provided in the embodiment is less than 0.1 percent after adding the light blocker carbon black material and the ultraviolet light absorber.
Illustratively, the surface layer 6 is selected from BOPET (biaxially oriented polyester film) or CPP (cast polypropylene film) or CPET (unstretched polyester) films, the three films have stretchability with elongation at break being more than or equal to 50%, the thickness of the films is in the range of 0.008-0.035mm, the films have high transparency and high gloss, and good printing adaptation characteristics, and the three films can be well adapted to the molding requirements of products.
In some embodiments, the first and second tie layers are adhesive layers, and in particular, aqueous adhesives or solvent-free environmental-friendly composite adhesive products are used, commercially available. The characteristics are as follows: the compound fastness is more than or equal to 2N/15mm, and meets the national compound product solvent residue standard requirement.
The cheese packaging sheet meets the requirements of storing cheese at normal temperature in the aspects of moisture permeability, oxygen permeability and light resistance, and achieves the purposes of storing, transporting and selling cheese at normal temperature; in addition, by adding a white color master, the appearance is exquisite.
The printing layer 5 adopts gravure printing or flexographic printing, and can also adopt an ink-jet printing technology to realize pattern reproduction. The ink has high gloss, high temperature resistance and certain flexibility, and meets the environmental protection requirement.
The sheet provided by the utility model is convenient, quick, sanitary, quantitative, exquisite in appearance, easy to shape, and convenient for product storage, transportation and sales.
Depending on the object of sale (child or adult), the inner layer of the film may be selected with different easy-to-tear forces, for example: the easy-to-tear force of the cheese package for children is 2-8N, the easy-to-tear force of the cheese package for adults is 4-12N, and the different easy-to-tear forces are produced by blending a plurality of different polyolefins in the polyolefin copolymer in different proportions when the EVOH-polyolefin copolymer film is produced.
In order to meet different conditions of product storage, transportation and sales, two different cheese packaging composite sheets of normal temperature type and refrigeration type are developed. The normal temperature cheese composite sheet can also be applied to refrigeration type packaging application.
Claims (11)
1. The composite sheet for cheese packaging is characterized by at least comprising a base layer (1), a first connecting layer (2), a polyolefin layer (3), a second connecting layer (4), a printing layer (5) and a surface layer (6) from bottom to top; the base layer at least comprises a first polyolefin layer (11), a barrier layer (12) and a second polyolefin layer (13) from top to bottom; and the polyolefin layer (3) is a polyolefin layer to which a light blocking agent is added.
2. The composite sheet according to claim 1, wherein the barrier layer is EVOH (ethylene vinyl alcohol copolymer).
3. The composite sheet according to claim 2, wherein the EVOH (ethylene vinyl alcohol copolymer) has a thickness of 10 to 30% of the base layer.
4. The composite sheet according to claim 1, wherein the polyolefin layer is a polyolefin layer to which an ultraviolet absorber is added.
5. The composite sheet according to claim 1, wherein the facing layer is selected from BOPET (biaxially oriented polyester film) or CPP (cast polypropylene) or CPET (unstretched polyester film).
6. The composite sheet according to claim 1, wherein the polyolefin layer is selected from the group consisting of PVC (polyvinyl chloride), PS (polystyrene) and PP (polypropylene) sheets.
7. The composite sheet of claim 1 wherein the first and second tie layers are adhesive layers.
8. The composite sheet according to claim 1, wherein the polyolefin layer has a white color master added to the upper and lower sides thereof.
9. The composite sheet of claim 1 wherein the polyolefin layer has a thickness in the range of 0.15 to 0.30mm.
10. The composite sheet of claim 1 wherein the second polyolefin layer comprises a release layer.
11. The composite sheet of any one of claims 1-10, wherein the first polyolefin layer, the barrier layer, and the second polyolefin layer are laminated by multilayer coextrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552834.1U CN219856322U (en) | 2021-10-22 | 2021-10-22 | Composite sheet for cheese packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552834.1U CN219856322U (en) | 2021-10-22 | 2021-10-22 | Composite sheet for cheese packaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219856322U true CN219856322U (en) | 2023-10-20 |
Family
ID=88339354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122552834.1U Active CN219856322U (en) | 2021-10-22 | 2021-10-22 | Composite sheet for cheese packaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219856322U (en) |
-
2021
- 2021-10-22 CN CN202122552834.1U patent/CN219856322U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |