Multilayer co-extrusion film applied to protein food antibiosis
Through a multi-layer co-extruded film structure, combined with an antibacterial heat sealing layer and an EVOH barrier layer, the existing antibacterial film solves the problems of extending the shelf life and insufficient antibacterial ability under refrigerated conditions, achieving efficient freshness preservation and antibacterial effects.
Patent Information
- Application Number
- CN202421094468.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing antibacterial flexible packaging film cannot significantly extend the shelf life of meat and protein foods under refrigeration conditions, and the antibacterial ability is insufficient.
Using a multi-layer coextruded film structure, including composite layer, sub-outer layer, adhesive layer, barrier layer, inner layer and antimicrobial heat seal layer, antimicrobial properties are provided through the antimicrobial heat seal layer and antimicrobial coating, and are regulated by the EVOH barrier layer Gas barrier properties.
Significantly extend the shelf life of refrigerated meat and protein foods, maintain the fresh appearance, good smell and nutritional content of the food, while having excellent heat sealing ability and high transparency.
Smart Images
Figure CN222372451U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thin films, in particular to a multi-layer co-extrusion film used for antibacterial protein food. Background Art
[0002] As the demand for fresh meat, processed meat, and packaged protein foods becomes increasingly urgent, there is an increasing need to develop plastic flexible packaging films that extend shelf life and preserve freshness.
[0003] At present, the preservation method for protein meat products on the market is still freezing, and a small amount of packaging films with antibacterial functions are in use; the existing antibacterial soft packaging can extend the shelf life of fresh protein foods in a short period of time; the packaging films used for fresh meat, processed meat, and protein foods must have good antibacterial properties, excellent transparency, and excellent odor-free properties.
[0004] The existing antibacterial films cannot significantly extend the shelf life of meat and protein under refrigerated conditions and have insufficient antibacterial capabilities. Utility Model Content
[0005] The purpose of the utility model is to overcome the defects in the prior art and provide a multi-layer co-extrusion film for antibacterial protein food, which can effectively extend the shelf life of refrigerated meat and protein food and maintain a fresh appearance, good smell and nutritional ingredients.
[0006] In order to achieve the above purpose, the technical solution of the utility model is to provide
[0007] A multi-layer co-extruded film for antibacterial protein food, comprising a composite layer, a sub-outer layer, a first adhesive layer, a barrier layer, a second adhesive layer, a sub-inner layer and an antibacterial heat-sealing layer, wherein the composite layer, the sub-outer layer, the first adhesive layer, the barrier layer, the second adhesive layer, the sub-inner layer and the antibacterial heat-sealing layer are co-extruded and connected in order from top to bottom;
[0008] The heat-sealing surface of the antibacterial heat-sealing layer is coated with an antibacterial coating, and one side of the antibacterial coating is a raised particle layer.
[0009] Furthermore, the composite layer has a thickness of 8 to 12 um.
[0010] Furthermore, the thickness of the sub-outer layer is 8 to 12 um.
[0011] Furthermore, the thickness of the first adhesive layer is 4-8 um, and the first adhesive layer is made of Tie.
[0012] Furthermore, the thickness of the barrier layer is 5-10 um, and the barrier layer is made of EVOH.
[0013] Furthermore, the thickness of the second adhesive layer is 4-8 um, and the second adhesive layer is made of Tie.
[0014] Furthermore, the thickness of the sub-inner layer is 8-12 um.
[0015] Furthermore, the thickness of the antibacterial heat seal layer is 8 to 20 μm. The antibacterial heat seal layer can be LDPE, LLDPE or POP, or LDPE and LLDP, or LDPE, LLDPE and POP. In addition, to improve the antibacterial property, antibacterial masterbatch can be added to the antibacterial heat seal layer, and the antibacterial component is distributed inside the antibacterial heat seal layer through melt processing of the antibacterial masterbatch.
[0016] Furthermore, the antibacterial coating has a thickness of 1 to 2 um. The antibacterial coating is coated with an antibacterial liquid.
[0017] Furthermore, the thickness of the raised particle layer is 2-5 μm. The raised particle layer is formed on the surface of the antibacterial coating by using the antibacterial masterbatch.
[0018] The advantages and beneficial effects of the utility model are:
[0019] The co-extruded film prepared by the utility model has good high transparency and low haze, excellent heat sealing ability and antibacterial properties, which can significantly extend the shelf life of refrigerated meat and protein foods, and is particularly suitable for vacuum meat products such as refrigerated meat. The barrier layer uses EVOH as a gas barrier material, and the barrier properties of the film can be adjusted by adjusting the thickness and EVOH type. In addition, the co-extruded film prepared by the utility model has good anti-oil heat sealing ability; the antibacterial coating provides good antibacterial ability. The good compatibility and low density design of each layer make the film have high transparency and good mechanical properties and antibacterial properties. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The utility model is a schematic structural diagram of a multi-layer co-extrusion film used for antibacterial protein food.
[0021] Composite layer 1, sub-outer layer 2, first adhesive layer 3, barrier layer 4, second adhesive layer 5, sub-inner layer 6, antibacterial heat-sealing layer 7, antibacterial coating 8, raised particle layer 9. DETAILED DESCRIPTION
[0022] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0023] A multi-layer co-extruded film for antibacterial protein food, comprising a composite layer, a sub-outer layer, a first adhesive layer, a barrier layer, a second adhesive layer, a sub-inner layer and an antibacterial heat-sealing layer, wherein the composite layer, the sub-outer layer, the first adhesive layer, the barrier layer, the second adhesive layer, the sub-inner layer and the antibacterial heat-sealing layer are co-extruded and connected in order from top to bottom;
[0024] The heat-sealing surface of the antibacterial heat-sealing layer is coated with an antibacterial coating, and one side of the antibacterial coating is a raised particle layer.
[0025] As a preferred embodiment of the above technical solution, the thickness of the composite layer is 8 to 12 um, and the composite layer is made of HDPE film.
[0026] As a preferred embodiment of the above technical solution, the thickness of the sub-outer layer is 8-12 um, and the sub-outer layer is made of LLDPE film.
[0027] As a preferred embodiment of the above technical solution, the thickness of the first adhesive layer is 4-8 um, and the first adhesive layer is made of Tie.
[0028] As a preferred embodiment of the above technical solution, the thickness of the barrier layer is 5-10 um, and the barrier layer is made of EVOH.
[0029] As a preferred embodiment of the above technical solution, the thickness of the second adhesive layer is 4-8 um, and the second adhesive layer is made of Tie.
[0030] As a preferred embodiment of the above technical solution, the thickness of the secondary inner layer is 8 to 12 um and is made of LLDPE.
[0031] As a preferred embodiment of the above technical solution, the thickness of the antibacterial heat-sealing layer is 8 to 20 um.
[0032] As a preferred embodiment of the above technical solution, the antibacterial coating has a thickness of 1 to 2 um and is a nano-silver antibacterial coating.
[0033] As a preferred embodiment of the above technical solution, the thickness of the raised particle layer is 2-5 μm. The raised particle layer is formed on the surface of the antibacterial coating by antibacterial masterbatch.
[0034] Example:
[0035] A multi-layer co-extruded film for antibacterial protein food, comprising a composite layer 1, a sub-outer layer 2, a first adhesive layer 3, a barrier layer 4, a second adhesive layer 5, a sub-inner layer 6, an antibacterial heat-sealing layer 7, an antibacterial coating 8 and a raised particle layer 9, wherein the composite layer, the sub-outer layer, the first adhesive layer, the barrier layer, the second adhesive layer, the sub-inner layer and the antibacterial heat-sealing layer are co-extruded and connected in sequence from top to bottom; the antibacterial heat-sealing layer is formed by blending and melt extrusion, and a layer of antibacterial coating is coated on the surface of the antibacterial heat-sealing layer, and one side of the antibacterial coating is a raised particle layer.
[0036] The composite layer has a thickness of 10 um and is made of HDPE film.
[0037] The thickness of the secondary outer layer is 10 um, and the secondary outer layer is made of LLDPE film.
[0038] The thickness of the first adhesive layer is 4 um. The first adhesive layer is made of Tie, which is polyethylene grafted maleic anhydride (PE-g-MAH).
[0039] The thickness of the barrier layer is 5 um, and the barrier layer is made of EVOH.
[0040] The thickness of the second adhesive layer is 4 um, and the second adhesive layer is made of Tie, which is polyethylene grafted maleic anhydride (PE-g-MAH).
[0041] The thickness of the secondary inner layer is 10 um and is made of LLDPE.
[0042] The thickness of the antibacterial heat-sealing layer is 19 um, and the antibacterial heat-sealing layer adopts POP.
[0043] The antibacterial coating is a nano-silver antibacterial coating; and the thickness of the antibacterial coating is 1 um.
[0044] The raised particle layer uses antibacterial masterbatch; the antibacterial masterbatch is produced by Copperprotek. MB-PE PE antibacterial masterbatch. The thickness of the raised particle layer is 2.5um.
[0045]
[0046] The co-extruded film prepared by the utility model has good high transparency and low haze, excellent heat sealing ability and antibacterial properties. It can significantly extend the shelf life of refrigerated meat and protein foods, and is particularly suitable for vacuum meat products such as refrigerated meat. The barrier layer uses EVOH as a gas barrier material, and the barrier properties of the film can be adjusted by adjusting the thickness and EVOH type. In addition, thanks to the use of POP in the antibacterial heat sealing layer resin, it has good anti-oil heat sealing ability. The good compatibility and low density design of each layer make the film have high transparency, good mechanical properties and antibacterial properties.
[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A multi-layer co-extruded film for antibacterial protein food, characterized in that: It comprises a composite layer (1), a secondary outer layer (2), a first adhesive layer (3), a barrier layer (4), a second adhesive layer (5), a secondary inner layer (6) and an antibacterial heat-sealing layer (7), wherein the composite layer (1), the secondary outer layer (2), the first adhesive layer (3), the barrier layer (4), the second adhesive layer (5), the secondary inner layer (6) and the antibacterial heat-sealing layer (7) are co-extruded and connected in multiple layers from top to bottom; The antibacterial heat-sealing layer (7) is coated with an antibacterial coating (8) on the heat-sealing surface, and one side of the antibacterial coating is a raised particle layer (9).
2. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The composite layer (1) has a thickness of 8 to 12 μm.
3. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the secondary outer layer (2) is 8-12 um.
4. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the first adhesive layer (3) is 4-8 um.
5. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the barrier layer (4) is 5-10 um.
6. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the second adhesive layer (5) is 4-8 um.
7. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the secondary inner layer (6) is 8-12 um.
8. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the antibacterial heat-sealing layer (7) is 8 to 20 μm.
9. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The antibacterial coating (8) has a thickness of 1-2 μm.
10. The multi-layer co-extruded film for antibacterial protein food according to claim 1, characterized in that: The thickness of the raised particle layer (9) is 2-5 μm.