Transparent corn packaging film and packaging bag

Abstract

The utility model discloses a transparent corn packaging film and a packaging bag, and relates to the technical field of packaging films. The transparent corn packaging film comprises a packaging film body, the packaging film body comprises a PET layer, an NY layer is connected to the PET layer, a thermoplastic material layer is connected to the NY layer, and the PET layer, the NY layer and the thermoplastic material layer are compounded and bonded through a composite adhesive. The transparent corn packaging film can be transparent in material and visible in content, meanwhile, compared with imported high-barrier nylon, the production cost is reduced by 20% or above, good economical efficiency is achieved, the material has excellent high barrier performance, the oxygen transmission rate (OTR) and the water vapor transmission rate (WVTR) are both smaller than or equal to 1, through the design of the anti-blocking agent, the stability among multiple layers of materials is good, and the anti-blocking performance is good. The anti-fogging agent and the antibacterial agent are designed on the outer side of the film, so that the surface atomization condition of the film is reduced, the transparency of the film is kept, meanwhile, the antibacterial and bacteriostatic ability of the packaging film is provided, the sanitation of corn food is guaranteed, and the preservation time is long.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to a transparent corn packaging film and a packaging bag. Background Art

[0002] In recent years, corn packaged in highly transparent and high-barrier films has become a mainstream trendy product. This green and healthy food, with visible contents and easy to eat, has been favored by young office workers.

[0003] In the flexible packaging industry, to ensure the quality of corn, the packaging material is required to have super high water and oxygen barrier properties. The film material that can meet this performance requirement can be made of pure AL and VMPET materials, but such materials are not transparent and the contents cannot be visible. Therefore, it can only rely on imported high-barrier nylon. Although the performance of these imported materials can meet the requirements, they are expensive. Many packaging films currently developed in China adopt a multi-layer structure, the transparency is not good enough, and it is easily affected by surface atomization to reduce transparency. At the same time, the antibacterial property is not strong and cannot meet the demand. In view of the shortcomings of the existing technology, the utility model provides a transparent corn packaging film to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a transparent corn packaging film and packaging bag, which can achieve transparent materials and visible contents. At the same time, compared with imported high-barrier nylon, the production cost is reduced by more than 20%, with good economy, and the material has excellent high barrier properties, with oxygen permeability (OTR) and water vapor permeability (WVTR) both ≤1. Through the design of anti-adhesion agents, the stability between the multi-layer materials is good, and the adhesion of the multiple layers is avoided to affect the properties of the packaging film. Anti-fog agents and antibacterial agents are designed on the outside of the film to reduce the fogging of the film surface and maintain the transparency of the film. At the same time, the packaging film is provided with antibacterial and antibacterial capabilities, ensuring the hygiene of corn food and a long shelf life to meet the use requirements.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a transparent corn packaging film, comprising a packaging film body, the packaging film body comprising a PET layer, a NY layer connected to the PET layer, and a thermoplastic material layer connected to the NY layer;

[0006] The PET layer, the NY layer and the thermoplastic material layer are compositely bonded by a composite adhesive, wherein the composite adhesive is mixed with an anti-adhesive agent;

[0007] The outer side of the thermoplastic material layer is provided with an antifogging agent and an antibacterial agent, wherein the antifogging agent is used to maintain the transparency of the packaging film and prevent fogging;

[0008] The thermoplastic material layer is made of PE layer or RCPP layer material;

[0009] The PET layer is made of aluminum oxide PET.

[0010] Preferably, the composite adhesive includes a polyurethane dry composite adhesive and a reactive polyurethane solvent-free composite adhesive.

[0011] Preferably, the packaging film body is provided with a hand-tear opening.

[0012] Preferably, the packaging film body is provided with an "S"-shaped bending portion at the hand-tear opening, and double-sided tape and protective paper are respectively adhered inside the "S"-shaped bending portion, and the protective paper is bonded to the double-sided tape.

[0013] Preferably, a notch is provided between the double-sided adhesive tape and the protective paper, and the double-sided adhesive tape at the notch position is in contact with the packaging film body.

[0014] A packaging bag is made of the transparent corn packaging film.

[0015] The utility model discloses a transparent corn packaging film and packaging bag, which have the following beneficial effects:

[0016] 1. The transparent corn packaging film can be transparent and the contents are visible. At the same time, compared with imported high-barrier nylon, the production cost is reduced by more than 20%, which has good economy. The material has excellent high barrier properties, and the oxygen permeability (OTR) and water vapor permeability (WVTR) are both ≤1. Through the design of anti-adhesion agents, the stability between the multi-layer materials is good, and the adhesion of the multi-layers is avoided to affect the properties of the packaging film. Anti-fog agents and antibacterial agents are designed on the outside of the film to reduce the fogging of the film surface and maintain the transparency of the film. At the same time, the packaging film is provided with antibacterial and antibacterial capabilities to ensure the hygiene of corn food and a long shelf life to meet the use requirements.

[0017] 2. The transparent corn packaging film is designed with an "S"-shaped bent portion and double-sided adhesive tape and protective paper adhered thereto, so that after the packaging film body is torn open through the hand-tear opening, the "S"-shaped bent portion can be further torn open. When the packaging film body is torn open and used to wrap the corn, the double-sided adhesive tape adheres to the packaging film body, so that the packaging film body and the corn are stably wrapped and not easy to loosen. At the same time, the double-sided adhesive tape and the protective paper are fixed on the packaging film body, so no debris or garbage is generated. It is easy to use and meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 A schematic diagram of specific material categories of the thermoplastic material layer of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the main body of the packaging film of the utility model;

[0022] Figure 4 It is a side view of the main body of the packaging film of the utility model;

[0023] Figure 5 This is a diagram showing the use effect of the double-sided adhesive tape of the utility model.

[0024] In the figure: 1, PET layer; 2, NY layer; 3, thermoplastic material layer; 301, PE layer; 302, RCPP layer; 4, packaging film body; 401, hand-tear opening; 5, double-sided tape; 501, protective paper; 502, notch. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The embodiment of the present application provides a transparent corn packaging film, which solves the problem that the traditional corn packaging film is opaque and the contents cannot be seen, so it can only rely on imported high-barrier nylon. Although the performance of these imported materials can meet the requirements, they are expensive. Many packaging films currently developed in China use a multi-layer structure, the transparency is not good enough, and it is easy to be affected by surface atomization to reduce transparency. At the same time, the antibacterial property is not strong and cannot meet the demand.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1:

[0029] The utility model embodiment discloses a transparent corn packaging film. Figure 1 As shown in FIG. 5 , the packaging film body 4 includes a PET layer 1, a NY layer 2 is connected to the PET layer 1, and a thermoplastic material layer 3 is connected to the NY layer 2;

[0030] The PET layer 1, the NY layer 2 and the thermoplastic material layer 3 are compositely bonded by a composite adhesive, wherein the composite adhesive is mixed with an anti-adhesive agent;

[0031] In the multi-layer packaging film, adding anti-adhesive agents can prevent adhesion between layers and improve the stability of the transparent corn packaging film.

[0032] The outer side of the thermoplastic material layer 3 is provided with an antifogging agent and an antibacterial agent. The antifogging agent is used to maintain the transparency of the packaging film and prevent fogging, and the antibacterial agent provides antibacterial and antimicrobial capabilities to the packaging film.

[0033] Furthermore, when the PET layer 1, the NY layer 2 and the thermoplastic material layer 3 are subjected to a composite process, the composite process includes a boiling sterilization process and a steaming sterilization process.

[0034] Furthermore, the thermoplastic material layer 3 is made of PE layer 301 material. When the water boiling sterilization composite processing is adopted, the PE layer 301 uses self-blowing water boiling PE material. PE has thermoplasticity, becomes soft and reshaped by heating, and can restore its original shape after cooling. It has good chemical stability and is widely used in food packaging.

[0035] Furthermore, the composite adhesive includes polyurethane dry composite adhesive and reactive polyurethane solvent-free composite adhesive. When water boiling sterilization is adopted, the polyurethane dry composite adhesive and reactive polyurethane solvent-free composite adhesive are used to composite the first layer and the second layer of the material respectively. When steaming sterilization is adopted, the polyurethane dry composite adhesive is used to composite the first layer and the second layer of the material respectively.

[0036] Furthermore, the PET layer 1 is made of alumina PET material, which is a domestic material with oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) of ≤0.5; the NY layer 2 is made of domestic composite grade NY material, which is a special polyester film with transparent BOPET biaxially oriented polyester film as the base material and is formed by vapor deposition of alumina in a vacuum state. This material has many significant characteristics:

[0037] 1. High barrier properties: Alumina PET has extremely high barrier properties to oxygen and water vapor, making it an ideal choice for high barrier transparent packaging materials.

[0038] 2. High transparency: This material maintains the high transparency of PET film, so that the items can still maintain a clear visual effect after packaging.

[0039] 3. High adhesion: PET and alumina have high adhesion and are not easy to peel off, thus enhancing the stability and reliability of the packaging.

[0040] 4. High temperature resistance, high stiffness and good thermal stability: Alumina PET material can withstand high temperatures and maintain its shape and performance, and is suitable for applications in various high temperature environments.

[0041] 5. Stable chemical properties: This material has good chemical stability and can resist corrosion from a variety of chemical substances.

[0042] Embodiment 2:

[0043] The utility model embodiment discloses a transparent corn packaging film. Figure 1 As shown in FIG. 5 , the packaging film body 4 includes a PET layer 1, a NY layer 2 is connected to the PET layer 1, and a thermoplastic material layer 3 is connected to the NY layer 2;

[0044] The PET layer 1, the NY layer 2 and the thermoplastic material layer 3 are compositely bonded by a composite adhesive, wherein the composite adhesive is mixed with an anti-adhesive agent;

[0045] In the multi-layer packaging film, adding anti-adhesive agents can prevent adhesion between layers and improve the stability of the transparent corn packaging film.

[0046] The outer side of the thermoplastic material layer 3 is provided with an antifogging agent and an antibacterial agent. The antifogging agent is used to maintain the transparency of the packaging film and prevent fogging, and the antibacterial agent provides antibacterial and antimicrobial capabilities to the packaging film.

[0047] Furthermore, the thermoplastic material layer 3 is made of RCPP layer 302 material. When the steaming and sterilization process is adopted, the thermoplastic material layer 3 is selected to be RCPP layer 302 material. The RCPP layer 302 has excellent high temperature resistance and can be steamed in a high temperature environment without deformation, while the ordinary PE layer 301 material has poor high temperature resistance. Due to the high temperature resistance of the RCPP layer 302 material, it is particularly suitable for food packaging that requires high temperature steaming. At the same time, the mechanical properties of the RCPP layer 302 material are generally better than those of the PE layer 301 material, and it has higher strength and toughness.

[0048] To further improve the transparency of transparent corn packaging film, it is also necessary to control the preparation process and accurately control the preparation parameters such as melting temperature and melting time to ensure that the material will not produce unnecessary chemical reactions due to excessively high temperature or excessively long time during the preparation process, thereby affecting transparency. At the same time, it is necessary to reduce impurities and bubbles in the material, optimize the glue mixing procedure, ensure that the main agent and the curing agent can be fully and evenly mixed, and avoid the generation of glue particles due to improper glue mixing, which affects the transparency of the packaging film. During subsequent drying, the drying tunnel temperature needs to be accurately controlled to ensure that the glue layer can be evenly solidified during the drying process. When adding anti-adhesion agents, anti-fog agents and antibacterial agents, select additives with high transparency.

[0049] In summary, the transparent corn packaging film has the following advantages:

[0050] 1. Transparency: transparent visible contents;

[0051] 2. Economical: Compared with imported high barrier nylon, the production cost is reduced by more than 20%;

[0052] 3. High barrier property: oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) are both ≤1;

[0053] 4. Stability: through the design of anti-adhesive agents, the stability between the multi-layer materials is good, avoiding the adhesion of multiple layers affecting the properties of the packaging film;

[0054] 5. Anti-fog and antibacterial properties. Anti-fog agents and antibacterial agents are designed on the outside of the film to reduce the fogging of the film surface and maintain the transparency of the film. At the same time, the packaging film is provided with antibacterial and antimicrobial capabilities to ensure the hygiene of corn food and prolong its shelf life.

[0055] Embodiment 3:

[0056] The utility model embodiment discloses a transparent corn packaging film. Figure 1 As shown in FIG. 5 , the packaging film body 4 includes a PET layer 1, a NY layer 2 is connected to the PET layer 1, and a thermoplastic material layer 3 is connected to the NY layer 2;

[0057] The PET layer 1, the NY layer 2 and the thermoplastic material layer 3 are compositely bonded by a composite adhesive, wherein the composite adhesive is mixed with an anti-adhesive agent;

[0058] The outer side of the thermoplastic material layer 3 is provided with an antifogging agent and an antibacterial agent. The antifogging agent is used to maintain the transparency of the packaging film and prevent fogging, and the antibacterial agent provides antibacterial and antimicrobial capabilities to the packaging film.

[0059] Furthermore, a hand-tear opening 401 is provided on the packaging film body 4, and the hand-tear opening 401 is convenient for tearing the packaging film body 4, so that the packaging film body 4 is easy to tear and package corn food for use.

[0060] Furthermore, the packaging film body 4 is provided with an "S"-shaped bending portion at the position of the hand-tear opening 401, and double-sided adhesive tape 5 and protective paper 501 are respectively adhered inside the "S"-shaped bending portion, the protective paper 501 is attached to the double-sided adhesive tape 5, and a notch 502 is provided between the double-sided adhesive tape 5 and the protective paper 501, and the double-sided adhesive tape 5 at the position of the notch 502 is in contact with the packaging film body 4;

[0061] The device is designed with an "S"-shaped bent portion and double-sided adhesive tape 5 and protective paper 501 adhered thereto, so that after the packaging film main body 4 is torn open through the hand-tear opening 401, the "S"-shaped bent portion can be further torn open. After the packaging film main body 4 is torn open, when the corn is wrapped in the packaging film main body 4, the double-sided adhesive tape 5 adheres to the packaging film main body 4, so that the packaging between the packaging film main body 4 and the corn is stable and not easy to loosen. At the same time, the double-sided adhesive tape 5 and the protective paper 501 are fixed on the packaging film main body 4, so no debris or garbage is generated. It is easy to use and meets the use requirements.

[0062] Embodiment 4:

[0063] The utility model embodiment discloses a packaging bag, which is made of the transparent corn packaging film described in any one of the above embodiments.

[0064] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A transparent corn packaging film, comprising a packaging film body (4), wherein the packaging film body (4) comprises a PET layer (1), characterized in that: The PET layer (1) is connected to a NY layer (2), and the NY layer (2) is connected to a thermoplastic material layer (3); The PET layer (1), the NY layer (2) and the thermoplastic material layer (3) are compositely bonded by a composite adhesive, wherein the composite adhesive is mixed with an anti-adhesive agent; The outer side of the thermoplastic material layer (3) is provided with an antifogging agent and an antibacterial agent, wherein the antifogging agent is used to maintain the transparency of the packaging film and prevent fogging; The thermoplastic material layer (3) is made of a PE layer (301) or a RCPP layer (302) material; The PET layer (1) is made of alumina PET material.

2. A transparent corn packaging film according to claim 1, characterized in that: The composite adhesive includes a polyurethane dry composite adhesive and a reactive polyurethane solvent-free composite adhesive.

3. The transparent corn packaging film according to claim 1, characterized in that: The packaging film body (4) is provided with a hand-tear opening (401).

4. The transparent corn packaging film according to claim 3, characterized in that: The packaging film body (4) is provided with an "S"-shaped bending portion at the hand-tear opening (401), and double-sided adhesive tape (5) and protective paper (501) are respectively adhered inside the "S"-shaped bending portion, and the protective paper (501) is bonded to the double-sided adhesive tape (5).

5. The transparent corn packaging film according to claim 4, characterized in that: A notch (502) is provided between the double-sided adhesive tape (5) and the protective paper (501), and the double-sided adhesive tape (5) at the position of the notch (502) is in contact with the packaging film body (4).

6. A packaging bag, characterized in that: The transparent corn packaging film is made from any one of claims 1 to 5.

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