High-barrier food film and production process

Abstract

The invention relates to the technical field of food film production, in particular to a high-barrier food film and a production process thereof.The high-barrier food film comprises a composite layer, a sealing layer is arranged on one side of the composite layer, a reflective layer is arranged on the side, away from the composite layer, of the sealing layer, a printing layer is arranged on the side, away from the sealing layer, of the composite layer, and a black coating is arranged on one side of the printing layer; a protective coating is arranged on one side of the black coating, an oleophobic layer is arranged on one side of the protective coating, and edible flour is arranged on the side, away from the composite layer, of the reflective layer. According to the high-barrier food film and the production process, the toughness of the food film can be improved by adding the synthetic resin, the production cost can be effectively reduced by using the protein base, the viscosity can be increased by cooperatively using the guar gum and the maltodextrin, and by cooperatively using the vinyl alcohol copolymer barrier layer and the polyethylene, the high-barrier food film has a good barrier effect. The barrier property of the food film can be improved.

Description

Technical Field

[0001] This invention patent relates to the field of food film production technology, specifically a high barrier food film and production process. Background Art

[0002] Food film, also known as packaging film, mainly refers to the film used for packaging articles, usually including polyethylene film, biaxially oriented polyester, BOPP film and CPP film, etc., mainly used for the packaging of food, medicine and textiles. Unitization: One of the characteristics of stretch film packaging, that is, with the help of super strong winding force and retraction, the goods are compactly and fixedly bundled into a unit, so that scattered small pieces become a whole, even in unfavorable environment, the product can ensure that there is no looseness and separation of the goods to avoid damage. The packaging film is mainly extruded by mixing several different brands of polyethylene resins. It has puncture resistance and super strength and high performance. The goods stacked on the pallet are wrapped and packaged to make the packaging more stable and tidy and have super waterproof effect. It is widely used in foreign trade export, papermaking, hardware, plastic chemicals, building materials, food, medicine and other industries.

[0003] Currently, the toughness and barrier properties of various types of food films on the market are very poor. Under the premise of the same cost, improving the barrier properties will inevitably reduce the toughness; strengthening the toughness will also sacrifice the barrier properties. The two cannot be achieved at the same time. Therefore, a high-barrier food film and production process are urgently needed to improve the above problems.

[0004] Patent content of this invention

[0005] The purpose of this patent invention is to solve at least one of the technical defects.

[0006] To this end, one purpose of the present invention is to propose a high barrier food film and a production process to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a high barrier food film and a production process, including a composite layer, a sealing layer is arranged on one side of the composite layer;

[0008] A reflective layer is provided on the side of the sealing layer away from the composite layer;

[0009] A printing layer is provided on one side of the composite layer away from the sealing layer;

[0010] A black coating is provided on one side of the printing layer;

[0011] A protective coating is provided on one side of the black coating;

[0012] An oleophobic layer is provided on one side of the protective coating;

[0013] The side of the reflective layer away from the composite is provided with edible flour.

[0014] The present invention is further configured as follows: the composite layer is a mixture of synthetic resin, filler and plasticizer.

[0015] By adopting the above technical solution, the composite layer is a synthetic resin, which plays a role in improving toughness.

[0016] The present invention is further configured as follows: the sealing layer is a mixture of a vinyl alcohol copolymer barrier layer and polyethylene.

[0017] By adopting the above technical solution, the sealing layer is a mixture of the vinyl alcohol copolymer barrier layer and the polyethylene, which plays a role in improving the barrier property.

[0018] The present invention is further configured as follows: the reflective layer is a mixture of polyester and polypropylene.

[0019] By adopting the above technical solution, the reflective layer is a mixture of polyester and polypropylene, which plays a role in improving wear resistance.

[0020] The present invention is further configured as follows: the printing layer includes reflective particles, and a waterproof coating is provided on one side of the reflective particles.

[0021] By adopting the above technical solution, the printing layer includes reflective particles, which facilitates the printing of patterns.

[0022] The present invention is further configured as follows:

[0023] S1. Raw material selection: The staff selects polymers and composite materials with excellent barrier properties as basic raw materials;

[0024] S2. Formulation design: The staff determines the appropriate proportion of additives and fillers;

[0025] S3. Mixing and shaping: The staff will accurately weigh the selected raw materials according to the formula and mix them evenly;

[0026] S4. Molding and curing: The staff will cut the mixture into the required size and use equipment to complete the curing;

[0027] S5. Quality inspection and packaging: The staff verifies the product quality and packages it. The present invention is further configured as follows: in step S1, the staff searches for high-quality protein-based, polysaccharide-based and fat-based basic materials in the market and purchases them back to the factory warehouse; in step S2, the staff formulates a specific formula according to different needs, and adds guar gum and maltodextrin to the basic raw materials.

[0028] By adopting the above technical solutions, high-quality protein-based, polysaccharide-based and fat-based materials are found to improve the barrier properties.

[0029] The present invention is further configured as follows: in step S3, the staff puts the proportioned basic material together with guar gum and maltodextrin into the hot melt extruder, and the hot melt extruder can melt the basic material, guar gum and maltodextrin, and mix them by stirring to finally form a basic material mixture, and use the rotating spiral blade to push the basic material mixture to move, and transport it out from the output port of the hot melt extruder to form a long strip semi-finished product.

[0030] By adopting the above technical solution, the hot melt extruder can melt the base material, guar gum and maltodextrin, which facilitates mixing.

[0031] The present invention is further configured as follows: in step S4, the staff delivers the long strip semi-finished product into the interior of the molding dryer, the molding dryer uses a cylinder to compress the long strip semi-finished product, and stretches it to the required shape and thickness, and then enters the drying part, and is molded and cured. After molding and curing, it becomes the required high barrier food film.

[0032] By adopting the above technical solution, the forming dryer uses a cylinder to compress the long strip semi-finished product, which facilitates shaping.

[0033] The present invention is further configured as follows: in step S5, the staff retains samples and conducts random inspections on the completed high-barrier food film to ensure that the product meets the production standards. After ensuring that the product is qualified, the staff places the product into the packaging machine for final packaging of the product.

[0034] By adopting the above technical solution, samples can be retained and random inspections can be carried out, which makes it easier to trace batches.

[0035] In summary, the beneficial technical effects of the present invention are:

[0036] The high-barrier food film and production process can improve the toughness of the food film by adding a synthetic resin, can effectively reduce the production cost by using a protein base, can increase the viscosity by using guar gum and maltodextrin together, can improve the barrier properties of the food film by using a vinyl alcohol copolymer barrier layer and polyethylene together, and by using the above structure, while improving the high barrier properties of the food film, its production cost will not increase.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0039] Figure 1 It is a schematic diagram of the structure of the patent of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of the patented composite layer of the present invention;

[0041] Figure 3 It is a schematic diagram of the structure of the sealing layer of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure of the reflective layer of the present invention;

[0043] Figure 5 It is a schematic diagram of the structure of the printed layer of the present invention;

[0044] Figure 6 It is a schematic diagram of the patent process of this invention.

[0045] In the figure: 1. Composite layer; 2. Sealing layer; 3. Reflective layer; 4. Printing layer; 5. Black coating; 6. Protective coating; 7. Oleophobic layer; 8. Flour; 9. Synthetic resin; 10. Vinyl alcohol copolymer barrier layer; 11. Polyethylene; 12. Polyester; 13. Polypropylene; 14. Reflective particles; 15. Waterproof coating. DETAILED DESCRIPTION

[0046] The following will combine the drawings in the embodiments of the patent of the present invention to clearly and completely describe the technical solutions in the embodiments of the patent of the present invention. Obviously, the described embodiments are only part of the embodiments of the patent of the present invention, rather than all the embodiments. Based on the embodiments in the patent of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the patent of the present invention.

[0047] Embodiment 1

[0048] Reference 1 is a high barrier food film and production process disclosed in the present invention, comprising a composite layer 1, a sealing layer 2 is arranged on one side of the composite layer 1;

[0049] A reflective layer 3 is provided on the side of the sealing layer 2 away from the composite layer;

[0050] A printing layer 4 is provided on one side of the composite layer 1 away from the sealing layer 2;

[0051] A black coating 5 is provided on one side of the printed layer 4;

[0052] A protective coating 6 is provided on one side of the black coating 5;

[0053] An oleophobic layer 7 is provided on one side of the protective coating 6;

[0054] Edible flour 8 is arranged on the side of the reflective layer 3 away from the composite.

[0055] In this embodiment, the composite layer 1 serves to increase the ductility, the sealing layer 2 serves to prevent air interaction, the printing layer 4 serves to facilitate the printing of patterns, and the protective coating 5 serves to positively protect the patterns.

[0056] Reference Figure 2 and Figure 3 The composite layer 1 is a mixture of synthetic resin 9, filler and plasticizer, and the sealing layer 2 is a mixture of vinyl alcohol copolymer barrier layer 10 and polyethylene 11. In this embodiment, the vinyl alcohol copolymer barrier layer 10 plays a role in improving the barrier properties, and the polyethylene 11 plays a role in ensuring softness.

[0057] Reference Figure 4 The reflective layer 3 is a mixture of polyester 12 and polypropylene 13. In this embodiment, the polyester 12 serves to improve durability, and the polypropylene 13 serves to improve wear resistance.

[0058] Reference Figure 5 The printing layer 4 includes reflective particles 14, and a waterproof coating 15 is provided on one side of the reflective particles 14. In this embodiment, the reflective particles 14 serve to facilitate the printing of patterns, and the waterproof coating 15 serves to protect the patterns.

[0059] Embodiment 2

[0060] The following steps are involved:

[0061] S1. Raw material selection: The staff selects polymers and composite materials with excellent barrier properties as basic raw materials;

[0062] S2. Formulation design: The staff determines the appropriate proportion of additives and fillers;

[0063] S3. Mixing and shaping: The staff will accurately weigh the selected raw materials according to the formula and mix them evenly;

[0064] S4. Molding and curing: The staff will cut the mixture into the required size and use equipment to complete the curing;

[0065] S5. Quality inspection and packaging: The staff will check the quality of the products and package them.

[0066] In step S1, the staff searches for high-quality protein-based, polysaccharide-based and fat-based materials in the market and purchases them back to the factory warehouse. In step S2, the staff formulates a specific formula according to different needs and adds guar gum and maltodextrin to the basic raw materials.

[0067] In step S3, the staff puts the proportioned basic materials together with guar gum and maltodextrin into the hot melt extruder. The hot melt extruder can melt the basic materials, guar gum and maltodextrin, and mix them by stirring to finally form a basic material mixture. The basic material mixture is pushed to move by rotating spiral blades and transported out from the output port of the hot melt extruder to form a long strip semi-finished product.

[0068] In step S4, the staff sends the long strip semi-finished product into the interior of the forming dryer. The forming dryer uses a cylinder to compress the long strip semi-finished product and stretch it to the required shape and thickness. Then it enters the drying part and is formed and cured. After forming and curing, it becomes the required high barrier food film.

[0069] In step S5, the staff retains samples and conducts random inspections on the completed high-barrier food film to ensure that the product meets the production standards. After ensuring that the product is qualified, the staff places the product inside the packaging machine and performs the final packaging on the product.

[0070] The implementation principle of this embodiment is:

[0071] In the process of food film production, the staff first transports the basic materials to the warehouse, and then the engineers determine the mixing ratio of different food film basic materials according to different foods. After receiving the mixing ratio, the staff mixes the basic materials strictly according to the ratio indicated by the engineer, and then fuses the synthetic resin, filler and plasticizer to make a composite layer, which plays a role in ensuring the ductility of the food film.

[0072] The staff adds the basic raw materials, guar gum and maltodextrin to the inside of the hot melt extruder, the hot melt extruder starts working, and the above materials are added. After the materials are melted, they are stirred to mix the basic raw materials, guar gum and maltodextrin together. Subsequently, the spiral blades inside the hot melt extruder start to rotate and push the material mixture to move. The material mixture moves inside the hot melt extruder (the hot melt extruder is an existing structure and is not described in detail in this article), and as the spiral blades rotate, the material mixture can be pushed out of the hot melt extruder to form a strip-shaped semi-finished product. The staff uses a cutter to cut the long semi-finished product into similar lengths, and then places the long semi-finished product into the dryer (the dryer is an existing structure and is not described in detail in this article). The dryer is equipped with a roller to compress the long semi-finished product to the required thickness. When passing through the drying part, the compressed semi-finished product can be dried for molding and curing. After molding and curing, the staff divides the finished product into the required size. Finally, the staff of the inspection team conducts random inspections on a large number of products and retains batch samples for later traceability.

[0073] The vinyl alcohol copolymer barrier layer is mixed with polyethylene to form a sealing layer, which prevents the interaction of internal and external air, prolongs the time for food to spoil after being wrapped in the food film, and increases the high barrier property of the food film; the reflective layer is mixed with polyester and polypropylene, reduces energy loss, the printing layer includes reflective particles, which facilitate printing on the outside of the food film, the waterproof layer protects the printing layer, and a waterproof layer and a protective layer are sprayed on one side of the printing layer to protect the printing layer, and an oleophobic layer is sprayed on the outside of the protective layer to effectively prevent oil stains from remaining on the outside of the food film. In the process of wrapping food with the food film, edible flour is applied on one side of the reflective layer to prevent mutual influence between foods.

[0074] Compared with the prior art, the present invention has the following beneficial effects:

[0075] By adding synthetic resins, the toughness of the food film can be improved. By using a protein base, the production cost can be effectively reduced. The combination of guar gum and maltodextrin can increase the viscosity. The combination of a vinyl alcohol copolymer barrier layer and polyethylene can improve the barrier properties of the food film. By using the above structure, the production cost will not increase while the barrier properties of the food film are improved.

[0076] The embodiments of this specific implementation method are all preferred embodiments of the patent of the present invention, and are not intended to limit the protection scope of the patent of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the patent of the present invention should be covered within the protection scope of the patent of the present invention.

Claims

1. A high barrier food film, characterized in that: It comprises a composite layer (1), with a sealing layer (2) being arranged on one side of the composite layer (1); A reflective layer (3) is provided on the side of the sealing layer (2) away from the composite layer; A printing layer (4) is provided on a side of the composite layer (1) away from the sealing layer (2); A black coating (5) is provided on one side of the printed layer (4); A protective coating (6) is provided on one side of the black coating (5); An oleophobic layer (7) is provided on one side of the protective coating (6); Edible flour (8) is provided on the side of the reflective layer (3) away from the composite.

2. A high barrier food film according to claim 1, characterized in that: The composite layer (1) is formed by mixing a synthetic resin (9), a filler and a plasticizer.

3. The high barrier food film according to claim 1, characterized in that: The sealing layer (2) is formed by mixing a vinyl alcohol copolymer barrier layer (10) and polyethylene (11).

4. The high barrier food film according to claim 1, characterized in that: The reflective layer (3) is made of a mixture of polyester (12) and polypropylene (13).

5. The high barrier food film according to claim 1, characterized in that: The printed layer (4) comprises reflective particles (14), and a waterproof coating (15) is provided on one side of the reflective particles (14).

6. A high barrier food film production process, characterized in that: Here are the steps: S1. Raw material selection: The staff selects polymers and composite materials with excellent barrier properties as basic raw materials; S2. Formulation design: The staff determines the appropriate proportion of additives and fillers; S3. Mixing and shaping: The staff will accurately weigh the selected raw materials according to the formula and mix them evenly; S4. Molding and curing: The staff will cut the mixture into the required size and use equipment to complete the curing; S5. Quality inspection and packaging: The staff will check the quality of the products and package them.

7. The high barrier food film production process according to claim 1, characterized in that: In step S1, the staff searches for high-quality protein-based, polysaccharide-based and fat-based materials in the market and purchases them back to the factory warehouse. In step S2, the staff formulates a specific formula according to different needs and adds guar gum and maltodextrin to the basic raw materials.

8. The high barrier food film production process according to claim 1, characterized in that: In step S3, the staff puts the proportioned basic materials together with guar gum and maltodextrin into the hot melt extruder. The hot melt extruder can melt the basic materials, guar gum and maltodextrin, and mix them by stirring to finally form a basic material mixture. The basic material mixture is pushed to move by rotating spiral blades and transported out from the output port of the hot melt extruder to form a long strip semi-finished product.

9. The high barrier food film production process according to claim 1, characterized in that: In step S4, the staff sends the long strip semi-finished product into the interior of the molding dryer. The molding dryer uses a cylinder to compress the long strip semi-finished product and stretch it to the required shape and thickness. Then it enters the drying part and is molded and cured. After molding and curing, it becomes the required high barrier food film.

10. The high barrier food film production process according to claim 1, characterized in that: In step S5, the staff retains samples and conducts random inspections on the completed high-barrier food film to ensure that the product meets the production standards. After ensuring that the product is qualified, the staff places the product inside the packaging machine and performs the final packaging on the product.

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