CN110817043A - Dairy product packaging cover film - Google Patents
Dairy product packaging cover film Download PDFInfo
- Publication number
- CN110817043A CN110817043A CN201910993268.2A CN201910993268A CN110817043A CN 110817043 A CN110817043 A CN 110817043A CN 201910993268 A CN201910993268 A CN 201910993268A CN 110817043 A CN110817043 A CN 110817043A
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- Prior art keywords
- layer
- cover film
- heat
- packaging cover
- printing
- 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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
- B65D17/501—Flexible tape or foil-like material
- B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
- B65D53/08—Flexible adhesive strips adapted to seal filling or discharging apertures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a milk product packaging cover film which comprises a printing layer, a blocking layer, a bottom coating and a heat sealing layer, wherein the printing layer is a polyurethane resin ink layer or a nitrocellulose resin ink layer, and the thickness of the printing layer is 1-3 mu m; the barrier layer is an aluminum foil layer, and the thickness of the barrier layer is 20-50 microns; the primer layer is an olefin-acrylate-acrylic acid copolymer resin layer, and the glue coating amount is 0.5-1 g/m2(ii) a The heat sealing layer is composed of acrylate monomer, styrene, maleic anhydride and auxiliary agentThe glue coating amount is 3-7 g/m2(ii) a The printing layer is printed on one side of the barrier layer, and the base coat and the heat sealing layer are sequentially coated on the other side of the barrier layer. The invention provides the cover film for the milk product package, which is low in manufacturing cost, environment-friendly and recyclable.
Description
Technical Field
The invention relates to the technical field of food packaging, in particular to a dairy product packaging cover film.
Background
In the prior art, a milk product packaging cover film comprises a printing layer, a barrier layer and a heat sealing layer; the printing layer generally has two modes of PET inner printing and aluminum foil surface printing; the barrier layer adopts an aluminum foil or aluminum-plated structure as the barrier layer, wherein the shelf life of the milk product taking the aluminum foil as the barrier layer is longer, and the aluminum foil is generally selected as the barrier layer for the milk product needing to be stored for a long time; when the aluminum foil is used as the blocking layer, the heat sealing layer has two schemes of gluing and composite film, the gluing scheme needs less plastic products compared with the composite film scheme, the environment protection is better, but the glue used for the heat sealing layer is generally expensive and difficult to be used in the low-end dairy product packaging cover film market, and the gluing scheme is a main selection scheme of European and American dairy product packaging cover films.
When the acrylic resin is used as a heat sealing layer for gluing the milk product packaging cover film, the acrylic resin has good adhesion to an aluminum foil, but the acrylic resin generally has slight smell and may influence the taste of the milk product, and the acrylic resin and the nonpolar PP cup have poor heat sealing effect, so the acrylic resin is less used in the existing gluing scheme of the milk product packaging cover film.
When the milk product packaging cover film is coated with glue and vinyl chloride-vinyl acetate copolymer resin is used as an adhesion promoter, the heat-sealing glue has good adhesion to the aluminum foil, but the risk of plasticizer precipitation exists when the vinyl chloride resin is directly contacted with cream products; the plasticizer is added into PVC (polyvinyl chloride) to improve the flexibility, cold resistance and stability of PVC; however, in oily food packaging, the plasticizer and free vinyl chloride monomer commonly used in PVC are easily separated out, and there is a great risk of food safety in butter packaging; vinyl chloride monomer is listed as a carcinogen by the world health organization international agency for research on cancer; in addition, PVC is a major source of dioxin, and when PVC is produced, recovered and destroyed in an incinerator, it has great harm to humans and animals, so that the removal of PVC in the preparation of a cover film for dairy products packaging is more beneficial to health and environmental protection.
The high-grade polyolefin resin is adopted in the milk product packaging cover film gluing process, the resin is mainly formed by copolymerizing olefin products and a small amount of acrylic resin, has good adhesive force on aluminum foil and good heat sealing effect on PS (polystyrene) and PP (polypropylene) cups, but the synthetic route of the resin is complex and expensive, and technical barriers exist.
The technical personnel in the field need a cover film which has low preparation cost, high safety performance, good environmental protection performance and good tearing effect of the cover film and the cup body and can be used for packaging dairy products.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the cover film for packaging the dairy products, which has the advantages of low manufacturing cost, antibacterial function, environmental protection, safety and good effect of easily tearing the cover film and the cup body.
In order to achieve the purpose, the technical scheme of the invention is to design a milk product packaging cover film, which comprises a printing layer, a blocking layer, a bottom coating and a heat sealing layer, wherein the printing layer is a polyurethane resin ink layer or a nitrocellulose resin ink layer, and the thickness of the printing layer is 1-3 μm; the barrier layer is an aluminum foil layer, and the thickness of the barrier layer is 20-50 microns; the primer layer is an olefin-acrylate-acrylic acid copolymer resin layer, and the glue coating amount is 0.5-1 g/m2(ii) a The heat-sealing layer is composed of an acrylate monomer, styrene, maleic anhydride and an auxiliary agent, and the coating amount of the heat-sealing layer is 3-7 g/m2(ii) a The printing layer is printed on one side of the barrier layer, and the base coat and the heat sealing layer are sequentially coated on the other side of the barrier layer.
Compared with the gluing mode of one-time gluing in the prior art, the gluing mode of combining the base coating and the heat sealing layer greatly saves cost, the base coating uses the olefin-acrylic resin copolymer resin to prime and enhance the adhesive force between the glue layer and the aluminum foil layer, the second layer uses the acrylic resin to be well heat-sealed with the substrates such as PS, PP, PVC and the like, the using amount of the olefin-acrylic resin glue is reduced, and the manufacturing cost is remarkably saved. Due to the influence of various factors in the production process of the aluminum foil, the aluminum foil with the thickness less than 20 mu m has pinhole defects when being used for food packaging, and the barrier property of the aluminum foil is influenced.
The polyacrylic resin has the advantages of low cost, mature production process, good glossiness, strong adhesive force, good weather resistance and the like, common packaging films mainly adopt a heating sealing mode for structures such as polyester, polypropylene and the like, and the heat sealing temperature of the cover film of the dairy product is about 90 ℃.
As a preferred technical scheme, the heat-sealing layer comprises the following components in percentage by mass: the content of the acrylate monomer is 70-90%, the content of the styrene is 8-20%, the content of the maleic acid glycoside is 0.5-3%, and the content of the auxiliary agent is 1.5-10%; wherein the acrylate monomers include BMA and MMA.
According to a preferred technical scheme, the dosage of the acrylic monomer BMA to MMA is 2 to 1. MMA can prevent the emulsion from self-adhesion after coating, and the heat sealing strength of the film is increased; while BMA increases the flexibility of the chain, improves the leveling properties of the emulsion and the flexibility of the film. With the increase of MMA and styrene in the hard monomer, the glass transition temperature of the polymer is increased, and the strength is reduced when the polymer is subjected to heat sealing at 90 ℃; too much BMA in the soft monomer will make the coating strongly self-adhesive at room temperature, so a reasonable monomer ratio of 2:1 is used.
As a preferred technical scheme, the auxiliary agent comprises the following components in percentage by mass: 5-8% of fumed silica, 0.3-0.5% of wax powder and 0-3% of antibacterial agent. The wax powder is the winning PP wax powder, the fumed silica is commercially available, the hydrophobic silica is modified by a dichlorosilane coupling agent, and the primary particle size is 12 nm.
The hydrophobic silica increases steric hindrance between silica particles, so that the hydrophobic silica can be well dispersed in an organic medium, and the compatibility between the silica and the organic dispersion medium is enhanced. The fumed silica is dispersed in the gaps among the polymer molecular chains to connect the polymer molecular chains together, so that the relative motion resistance of the polymer molecular chains is increased, and the toughness, strength and ductility of the polyester resin are improved. Meanwhile, as the diameter of the fumed silica particles is nano-scale, the product becomes smoother due to the small-size effect of the fumed silica particles, and the wear resistance is greatly improved. The gas-phase silicon dioxide is added into the heat sealing layer, and no adhesive residue exists on the cup body in the separation process of the cover film and the cup body, so that the tearing effect of the cover film is improved.
Preferably, the fumed silica is hydrophobic and has a specific surface area of 200. + -.25 m2/g。
Preferably, the antibacterial agent is one or two of a soybean protein polypeptide antibacterial agent and a lactoferrin B antibacterial agent. And adding a small amount of antibacterial agent into the heat-sealing layer, wherein the antibacterial agent is a food-grade antibacterial agent. When the cover film is used for packaging milk products stored at normal temperature, the cover film has a good antibacterial effect, and the usage amount of preservatives in the milk products can be reduced. The antibacterial peptide is an oligopeptide consisting of 10-60 amino acid residues and having biological activity, the cationic peptide is abundant, and the antibacterial peptide serving as the antibacterial agent has the advantages of high thermal stability, strong water solubility, wide antibacterial spectrum, high efficiency, multiple antibacterial targets, no side effect on normal human bodies and the like. In addition, antimicrobial peptides can also reduce the incidence of cancer. The soybean protein antibacterial polypeptide (GAP) is an alkaline peptide in glycinin, and has good antibacterial effect on Staphylococcus aureus, Escherichia coli, etc.
As a preferable technical scheme, the main component of the bottom coating is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer. The primary procurement companies include VP4311E, VP4322E, VP4174E and VP4294E of the Woodson company of Germany, and ACTEseal-HSC-170E1 and ACTEseal-HSC-176-1 of the ATTACA company of Germany.
The invention has the advantages and beneficial effects that: the cover film adopts a double-layer gluing process, the bottom layer adopts an olefin-acrylic resin layer, and the heat sealing layer adopts acrylic resin added with fumed silica, so that the use amount of an olefin-acrylic resin adhesive with high price is reduced, and the production cost is reduced; the invention reduces the thickness of the cover film and improves the flatness of the cover film; the cover film has good bonding performance and easy tearing performance with the PS cup and the PP cup, and the torn part has high flatness and no burr feeling; the PVC auxiliary agent is not added into the cover film, so that the safety and the environmental protection performance of the cover film are improved; the soybean polypeptide antibacterial agent and the lactoferrin B are added to cover the smell of the acrylic resin, so that the heat sealing layer has a good antibacterial effect.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The preparation process of the invention comprises the following steps:
a. a printing procedure: printing on the polyurethane resin ink layer or the nitrocellulose resin ink layer to prepare a printing layer; the thickness of the printing layer is 1-1.2 mu m
b. A compounding procedure: the printing layer and the aluminum foil are compounded in a dry mode to form a composite film, and the thickness of the aluminum foil layer is 20-22 mu m;
c. gluing for the first time: coating a bottom coating on the surface of the aluminum foil layer of the composite film, wherein the bottom coating is coated once in the transverse direction and the longitudinal direction respectively, the bottom coating temperature is 80-85 ℃, the coating speed is 100m/min, and the total coating weight is 0.8g/m2Drying at 90-95 ℃; the bottom coating is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer;
d. gluing for the second time: after the base coat is completely dried, heat seal layer sizing is carried out, the heat seal layer sizing temperature is 60-65 ℃, the coating speed is 100m/min, and the total glue coating amount is 7g/m2And drying at 65 ℃. In the heat-seal adhesive, the content of acrylate monomer is 80%, the content of styrene is 12%, the content of maleic acid glycoside is 2.7%, the content of fumed silica is 5%, and the content of wax powder is 0.3%.
The heat-sealing temperature of the lidding film of example 1 was 190 to 220 ℃ and the heat-sealing strength was 8N/15 mm.
Example 2
The preparation process of the invention comprises the following steps:
a. a printing procedure: printing on the polyurethane resin ink layer or the nitrocellulose resin ink layer to prepare a printing layer; the thickness of the printing layer is 1.2-1.5 mu m
b. A compounding procedure: forming a composite film by dry compounding the printing layer and the aluminum foil, wherein the thickness of the aluminum foil layer is 25-26 mu m;
c. gluing for the first time: coating on the surface of the aluminum foil layer of the composite filmThe primer coats are coated once in the transverse direction and the longitudinal direction respectively, the primer coating temperature is 80-85 ℃, the coating speed is 100m/min, and the total glue coating amount is 0.6g/m2Drying at 90-95 ℃; the bottom coating is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer;
d. gluing for the second time: after the base coat is completely dried, heat seal layer sizing is carried out, the heat seal layer sizing temperature is 60-65 ℃, the coating speed is 100m/min, and the total glue coating amount is 10g/m2And drying at 65 ℃. In the heat-seal adhesive, the content of acrylate monomer is 80%, the content of styrene is 12%, the content of maleic acid glycoside is 2.7%, the content of fumed silica is 4%, and the content of wax powder is 0.3% and the content of soybean protein polypeptide antibacterial agent is 1%.
The heat-sealing temperature of the cover film of the embodiment 2 is 190-220 ℃, and the heat-sealing strength is 8.5N/15 mm.
Example 3
The preparation process of the invention comprises the following steps:
a. a printing procedure: printing on the polyurethane resin ink layer or the nitrocellulose resin ink layer to prepare a printing layer; the thickness of the printing layer is 1.2-1.5 mu m
b. A compounding procedure: the printing layer and the aluminum foil are compounded in a dry mode to form a composite film, and the thickness of the aluminum foil layer is 20-22 mu m;
c. gluing for the first time: coating a bottom coating on the surface of the aluminum foil layer of the composite film, wherein the bottom coating is coated once in the transverse direction and the longitudinal direction respectively, the bottom coating temperature is 80-85 ℃, the coating speed is 100m/min, and the total coating weight is 0.6g/m2Drying at 90-95 ℃; the bottom coating is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer;
d. gluing for the second time: after the base coat is completely dried, heat seal layer sizing is carried out, the heat seal layer sizing temperature is 60-65 ℃, the coating speed is 100m/min, and the total glue coating amount is 8g/m2And drying at 65 ℃. The content of acrylate monomer in the heat-seal adhesive is 78%, the content of styrene is 12%, the content of maleic acid glycoside is 2.5%, the content of fumed silica is 6%, the content of wax powder is 0.5%, the content of soybean protein polypeptide antibacterial agent is 0.5%, and the content of lactoferrin B antibacterial agent is 0.5%.
The heat-sealing temperature of the lidding film of example 3 was 190 to 220 ℃ and the heat-sealing strength was 7.6N/15 mm.
Example 4
The preparation process of the invention comprises the following steps:
a. a printing procedure: printing on the polyurethane resin ink layer or the nitrocellulose resin ink layer to prepare a printing layer; the thickness of the printing layer is 2-2.2 mu m
b. A compounding procedure: forming a composite film by dry compounding the printing layer and the aluminum foil, wherein the thickness of the aluminum foil layer is 30-33 mu m;
c. gluing for the first time: coating a bottom coating on the surface of the aluminum foil layer of the composite film, wherein the bottom coating is coated once in the transverse direction and the longitudinal direction respectively, the bottom coating temperature is 80-85 ℃, the coating speed is 100m/min, and the total coating weight is 0.5g/m2Drying at 90-95 ℃; the bottom coating is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer;
d. gluing for the second time: after the base coat is completely dried, heat seal layer sizing is carried out, the heat seal layer sizing temperature is 60-65 ℃, the coating speed is 100m/min, and the total glue coating amount is 6g/m2And drying at 65 ℃. In the heat-seal adhesive, the content of acrylate monomer is 85%, the content of styrene is 5%, the content of maleic acid glycoside is 3%, the content of fumed silica is 6.7%, and the content of wax powder is 0.3%.
The heat-sealing temperature of the lidding film of example 4 was 190 to 220 ℃ and the heat-sealing strength was 6.5N/15 mm.
Example 5
The preparation process of the invention comprises the following steps:
a. a printing procedure: printing on the polyurethane resin ink layer or the nitrocellulose resin ink layer to prepare a printing layer; the thickness of the printing layer is 2.5-2.8 mu m
b. A compounding procedure: forming a composite film by dry compounding the printing layer and the aluminum foil, wherein the thickness of the aluminum foil layer is 45-48 mu m;
c. gluing for the first time: coating primary coats on the surface of the aluminum foil layer of the composite film, wherein the primary coats are coated respectively in the transverse direction and the longitudinal direction, the primary coat temperature is 80-85 ℃, the coating speed is 100m/min, and the total glue coating amount is 1g/m2Drying at 90-95 ℃; the bottom coat is methacrylic acid-methyl methacrylateEster-butyl methacrylate-styrene-butadiene copolymer;
d. gluing for the second time: after the base coat is completely dried, heat seal layer sizing is carried out, the heat seal layer sizing temperature is 60-65 ℃, the coating speed is 100m/min, and the total glue coating amount is 7g/m2And drying at 65 ℃. In the heat-seal adhesive, the content of acrylate monomer is 85%, the content of styrene is 10%, the content of maleic acid glycoside is 1.7%, the content of fumed silica is 2%, the content of wax powder is 0.3%, and the content of lactoferrin B antibacterial agent is 1%.
The heat-sealing temperature of the lidding film of example 5 was 190 to 220 ℃ and the heat-sealing strength was 7.5N/15 mm.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The packaging cover film for the dairy product comprises a printing layer, a blocking layer, a bottom coating and a heat sealing layer, and is characterized in that the printing layer is a polyurethane resin ink layer or a nitrocellulose resin ink layer, and the thickness of the printing layer is 1-3 mu m; the barrier layer is an aluminum foil layer, and the thickness of the barrier layer is 20-50 microns; the primer layer is an olefin-acrylate-acrylic acid copolymer resin layer, and the glue coating amount is 0.5-1 g/m2(ii) a The heat-sealing layer is composed of an acrylate monomer, styrene, maleic anhydride and an auxiliary agent, and the coating amount of the heat-sealing layer is 3-7 g/m2(ii) a The printing layer is printed on one side of the barrier layer, and the base coat and the heat sealing layer are sequentially coated on the other side of the barrier layer.
2. The milk product packaging cover film according to claim 1, wherein the heat-sealing layer comprises, by mass: the content of the acrylate monomer is 70-90%, the content of the styrene is 8-20%, the content of the maleic acid glycoside is 0.5-3%, and the content of the auxiliary agent is 1.5-10%; wherein the acrylate monomers include BMA and MMA.
3. The dairy packaging cover film of claim 2, wherein the acrylate monomer is present in a molar ratio of BMA to MMA of 2 to 1.
4. The milk product packaging cover film according to claim 3, wherein the auxiliary agent accounts for the following mass percent of the heat sealing layer: 5-8% of fumed silica, 0.3-0.5% of wax powder and 0-3% of antibacterial agent.
5. A milk product packaging cover film according to claim 4, characterized in that the fumed silica is hydrophobic silica and has a specific surface area of 200 ± 25m2/g。
6. The milk product packaging cover film of claim 5, wherein the main component of the base coat is methacrylic acid-methyl methacrylate-butyl methacrylate-styrene-butadiene copolymer.
7. The milk product packaging cover film according to claim 6, wherein the antibacterial agent is one or two of a soy protein polypeptide antibacterial agent and a lactoferrin B antibacterial agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910993268.2A CN110817043A (en) | 2019-10-18 | 2019-10-18 | Dairy product packaging cover film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910993268.2A CN110817043A (en) | 2019-10-18 | 2019-10-18 | Dairy product packaging cover film |
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| Publication Number | Publication Date |
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| CN110817043A true CN110817043A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910993268.2A Pending CN110817043A (en) | 2019-10-18 | 2019-10-18 | Dairy product packaging cover film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114572557A (en) * | 2020-11-30 | 2022-06-03 | 内蒙古伊利实业集团股份有限公司 | Sealing film, cup containing sealing film and preparation method of cup |
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| JPS4918126A (en) * | 1972-06-10 | 1974-02-18 | ||
| US5626929A (en) * | 1995-06-07 | 1997-05-06 | Aluminum Company Of America | Peelable and heat sealable lidstock material for plastic containers |
| CN2308572Y (en) * | 1997-07-31 | 1999-02-24 | 浙江长兴轻工总厂 | Sterilizing health sealing film |
| CN201941196U (en) * | 2011-01-07 | 2011-08-24 | 范传龙 | Safe high barrier composite film of liquid food |
| CN106833437A (en) * | 2017-01-25 | 2017-06-13 | 江阴宝柏包装有限公司 | A kind of preparation method for hindering acid type blister package aluminium foil epiphragma, epiphragma and application |
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2019
- 2019-10-18 CN CN201910993268.2A patent/CN110817043A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4918126A (en) * | 1972-06-10 | 1974-02-18 | ||
| US5626929A (en) * | 1995-06-07 | 1997-05-06 | Aluminum Company Of America | Peelable and heat sealable lidstock material for plastic containers |
| CN2308572Y (en) * | 1997-07-31 | 1999-02-24 | 浙江长兴轻工总厂 | Sterilizing health sealing film |
| CN201941196U (en) * | 2011-01-07 | 2011-08-24 | 范传龙 | Safe high barrier composite film of liquid food |
| CN106833437A (en) * | 2017-01-25 | 2017-06-13 | 江阴宝柏包装有限公司 | A kind of preparation method for hindering acid type blister package aluminium foil epiphragma, epiphragma and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114572557A (en) * | 2020-11-30 | 2022-06-03 | 内蒙古伊利实业集团股份有限公司 | Sealing film, cup containing sealing film and preparation method of cup |
| CN114572557B (en) * | 2020-11-30 | 2024-01-26 | 内蒙古伊利实业集团股份有限公司 | Sealing film, cup containing sealing film and preparation method of sealing film |
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Application publication date: 20200221 |