A flame retardant tensile polyamide film

Abstract

The utility model relates to a flame-retardant tensile-resistant polyamide film, which belongs to the technical field of polyamide films, and comprises a polyamide film base layer, wherein an antibacterial structure is arranged on the outside of the polyamide film base layer, wherein the antibacterial structure comprises an anti-stretching layer arranged on the top of the polyamide film base layer, and an antibacterial layer is arranged on the side of the anti-stretching layer away from the polyamide film base layer. The flame-retardant tensile-resistant polyamide film, by arranging the antibacterial layer, can have an antibacterial effect on the polyamide film base layer, thereby preventing most bacteria from passing through the polyamide film base layer and causing contamination to food, and then by arranging the antibacterial agent, it can effectively kill most bacteria, thereby ensuring the safety of food, and at the same time can improve the shelf life of food, thereby solving the problem that no corresponding antibacterial structure is arranged, and since polyamide film is usually used for food packaging, some bacteria may pass through the film and directly contact with food, thereby affecting the shelf life of food and failing to meet production needs.

Description

Technical Field

[0001] The utility model relates to the technical field of polyamide films, in particular to a flame-retardant and tensile-resistant polyamide film. Background Art

[0002] Polyamide film is made of nylon resin and can be manufactured by T-type (extrusion casting) film forming method (non-stretched film), T-type die biaxial stretch film forming method and air blowing expansion method (biaxial stretch film). Resin raw materials with higher viscosity should be used. Commercially available commercial films are mainly nylon 6 and nylon 66 films. Nylon film has the characteristics of high strength, good oxygen barrier and good transparency. The industrial use is mainly as vacuum bag film for molding, and the civilian use is mainly as food packaging film.

[0003] After searching, the Chinese patent CN216885555U in the prior art discloses a flame retardant polyamide film, including a polyamide film base, a first flame retardant layer fixedly connected to one side of the polyamide film base, a heat insulation layer fixedly connected to one side of the first flame retardant layer, a tensile layer fixedly connected to one side of the polyamide film base away from the first flame retardant layer, a second flame retardant layer fixedly connected to one side of the tensile layer, and a reflective layer fixedly connected to one side of the second flame retardant layer. The utility model can effectively increase the flame retardant effect of the film by setting a multi-layer flame retardant and heat insulation structure, is not prone to spontaneous combustion, and increases its service life.

[0004] However, during use, the utility model does not have a corresponding antibacterial structure. Since polyamide film is usually used for food packaging, some bacteria may pass through the film and come into direct contact with food, affecting the shelf life of the food. This cannot meet production needs. Therefore, a flame-retardant and tensile-resistant polyamide film is proposed to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a flame retardant and tensile-resistant polyamide film, which has the advantage of improving the antibacterial effect and solves the problem that no corresponding antibacterial structure is set. Since polyamide film is usually used for food packaging, some bacteria may pass through the film and come into direct contact with food, affecting the shelf life of the food and failing to meet production needs.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flame-retardant tensile-resistant polyamide film, comprising a polyamide film base layer, wherein an antibacterial structure is arranged on the outside of the polyamide film base layer;

[0007] The antibacterial structure comprises an anti-stretching layer arranged on the top of a polyamide film base layer, an antibacterial layer is arranged on the side of the anti-stretching layer away from the polyamide film base layer, and an antibacterial agent is arranged on the side of the antibacterial layer away from the anti-stretching layer.

[0008] Furthermore, the number of the antibacterial layer and the antibacterial agent are both two, the two antibacterial layers are evenly distributed on the top and bottom of the polyamide film base layer, and the bottom antibacterial layer is in contact with the bottom of the polyamide film base layer.

[0009] Furthermore, the antibacterial layer is a food-grade TPU film, and the antibacterial agent is an inorganic antibacterial agent.

[0010] Furthermore, a high temperature resistant layer is arranged on the side of the antibacterial agent away from the antibacterial layer, and a first flame retardant layer is arranged on the side of the antibacterial agent at the bottom away from the polyamide film base layer.

[0011] Furthermore, the high temperature resistant layer is a cast polypropylene film, and the first flame retardant layer is a halogen-free flame retardant coating.

[0012] Furthermore, a second flame retardant layer is provided on a side of the high temperature resistant layer away from the polyamide film base layer, and the second flame retardant layer is an acrylic fiber layer.

[0013] Compared with the prior art, the utility model provides a flame retardant and tensile polyamide film, which has the following beneficial effects:

[0014] The flame-retardant tensile polyamide film, by providing an antibacterial layer, can have an antibacterial effect on the polyamide film base layer, thereby preventing most bacteria from passing through the polyamide film base layer and contaminating food. Furthermore, by providing an antibacterial agent, most bacteria can be effectively killed, thereby ensuring the safety of food and improving the shelf life of food. This solves the problem of not providing a corresponding antibacterial structure, as polyamide film is usually used for food packaging, which may cause some bacteria to pass through the film and come into direct contact with food, thereby affecting the shelf life of food and failing to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the structure of the utility model.

[0016] In the figure: 1 polyamide film base layer, 2 anti-stretching layer, 3 antibacterial layer, 4 antibacterial agent, 5 high temperature resistant layer, 6 first flame retardant layer, 7 second flame retardant layer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0018] See also Figure 1In this embodiment, a flame-retardant tensile-resistant polyamide film includes a polyamide film base layer 1, an antibacterial structure is arranged on the outside of the polyamide film base layer 1, and the antibacterial structure includes an anti-stretching layer 2 arranged on the top of the polyamide film base layer 1, an antibacterial layer 3 is arranged on the side of the anti-stretching layer 2 away from the polyamide film base layer 1, and an antibacterial agent 4 is arranged on the side of the antibacterial layer 3 away from the anti-stretching layer 2, and the anti-stretching layer 2 is a polyethylene long-life film.

[0019] Among them, the polyethylene longevity film is blown with polyethylene as the base resin, after adding a certain proportion of ultraviolet absorbers, anti-aging agents and antioxidants. It has strong pressure resistance and aging resistance. The number of antibacterial layers 3 and antibacterial agents 4 are two, and the two antibacterial layers 3 are evenly distributed on the top and bottom of the polyamide film base layer 1. The bottom antibacterial layer 3 is in contact with the bottom of the polyamide film base layer 1. The antibacterial layer 3 is a food-grade TPU film, and the antibacterial agent 4 is an inorganic antibacterial agent.

[0020] It should be noted that TPU film is a functional film with unparalleled characteristics such as high strength, good toughness, cold resistance, oil resistance, aging resistance, weather resistance, environmental protection, non-toxicity, and decomposability that other plastic materials cannot match. It also has many excellent functions such as high waterproof and moisture permeability, windproof, cold protection, antibacterial, warmth retention, UV resistance and energy release, and is widely used in various fields; inorganic antibacterial agents are antibacterial agents made using the bactericidal and antibacterial abilities of metals such as silver, copper, zinc, titanium and their ions. Since inorganic antibacterial agents are dissolution contact antibacterial agents, the antibacterial effect of inorganic antibacterial film is passive.

[0021] In addition, there are many methods for preparing antibacterial food packaging films. One is to make the antibacterial agent into an antibacterial masterbatch, which is prepared by extruding or pouring a single layer of the antibacterial agent or antibacterial masterbatch and a resin, or by co-extruding it as a surface layer and other layers to form an antibacterial composite film; another method is to coat or vapor-deposit the antibacterial agent on a resin film.

[0022] In this embodiment, a high temperature resistant layer 5 is provided on the side of the antibacterial agent 4 away from the antibacterial layer 3, and a first flame retardant layer 6 is provided on the side of the bottom antibacterial agent 4 away from the polyamide film base layer 1. The high temperature resistant layer 5 is a cast polypropylene film, and the first flame retardant layer 6 is a halogen-free flame retardant coating.

[0023] Among them, cast polypropylene film has the characteristics of low cost and high output, high transparency, and the effect of blocking water vapor and odor. Halogen-free flame retardant is a non-toxic, non-corrosive, environmentally friendly new flame retardant material with low smoke, high oxygen index and excellent flame retardancy.

[0024] In this embodiment, a second flame retardant layer 7 is provided on a side of the high temperature resistant layer 5 away from the polyamide film base layer 1 , and the second flame retardant layer 7 is an acrylic fiber layer.

[0025] The working principle of the above embodiment is:

[0026] Firstly, the first flame retardant layer 7 and the second flame retardant layer 6 can prevent the polyamide film base layer 1 from spontaneous combustion, thereby ensuring the safety of the polyamide film base layer 1. When the user needs to cook the food, the high temperature resistant layer 5 allows the polyamide film base layer 1 to be placed in a high temperature environment, thereby achieving an anti-cooking effect. The antibacterial layer 3 is then provided to have an antibacterial effect on the polyamide film base layer 1, thereby preventing most bacteria from passing through the polyamide film base layer 1 and contaminating the food. The antibacterial agent 4 is then provided to effectively kill most bacteria, thereby ensuring the safety of the food and improving the shelf life of the food. At the same time, the anti-stretching layer 2 is provided to improve the toughness of the polyamide film base layer 1, thereby preventing the user from using excessive force and causing damage to the polyamide film base layer 1.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flame retardant and tensile polyamide film, comprising a polyamide film base layer (1), characterized in that: The polyamide film base layer (1) is provided with an antibacterial structure on the outside; The antibacterial structure comprises an anti-stretching layer (2) arranged on the top of a polyamide film base layer (1), an antibacterial layer (3) is arranged on the side of the anti-stretching layer (2) away from the polyamide film base layer (1), and an antibacterial agent (4) is arranged on the side of the antibacterial layer (3) away from the anti-stretching layer (2).

2. The flame retardant tensile polyamide film according to claim 1, characterized in that: The number of the antibacterial layer (3) and the antibacterial agent (4) are both two, and the two antibacterial layers (3) are evenly distributed on the top and bottom of the polyamide film base layer (1), and the bottom antibacterial layer (3) is in contact with the bottom of the polyamide film base layer (1).

3. The flame retardant tensile polyamide film according to claim 1, characterized in that: The antibacterial layer (3) is a food-grade TPU film, and the antibacterial agent (4) is an inorganic antibacterial agent.

4. The flame retardant tensile polyamide film according to claim 1, characterized in that: A high temperature resistant layer (5) is provided on the side of the antibacterial agent (4) away from the antibacterial layer (3), and a first flame retardant layer (6) is provided on the side of the antibacterial agent (4) away from the polyamide film base layer (1).

5. The flame retardant tensile polyamide film according to claim 4, characterized in that: The high temperature resistant layer (5) is a cast polypropylene film, and the first flame retardant layer (6) is a halogen-free flame retardant coating.

6. The flame retardant tensile polyamide film according to claim 4, characterized in that: A second flame retardant layer (7) is provided on the side of the high temperature resistant layer (5) away from the polyamide film base layer (1), and the second flame retardant layer (7) is an acrylic fiber layer.

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