Degradable food coating paper

Abstract

The utility model relates to the technical field of food packaging, and discloses degradable food coating paper which comprises an upper degradable thin film layer, a functional layer, a tear-resistant layer and a lower degradable thin film layer. The functional layer is composed of an upper body paper layer, a lower body paper layer and a polylactic acid fiber net, the upper body paper layer is arranged on the surface layer of the top of the lower body paper layer, the polylactic acid fiber net is arranged between the upper body paper layer and the lower body paper layer, and protrusions integrally formed with the upper body paper layer and the lower body paper layer are arranged on the surface layers of the inner sides of the upper body paper layer and the lower body paper layer at equal intervals. The top surface layer of the functional layer is provided with a degradable upper thin film layer, and the top surface layer of the degradable upper thin film layer is coated with an oil separation layer; the food coating paper has certain strength, is remarkable in anti-tearing effect, not prone to damage, high in heat stability, good in heat insulation effect, convenient to take when wrapping hotter food, capable of achieving biodegradation and high in environmental protection property.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to a degradable food coating paper. Background Art

[0002] Degradable food coating paper is an environmentally friendly material combining a paper base and a special coating. Its main feature is that the coating on its surface not only endows the paper with properties such as waterproof, oil-proof, and high barrier, but also ensures the degradability of the paper, thus meeting the special requirements in the field of food packaging.

[0003] The previous degradable food coating paper has the following disadvantages: 1. It does not have a certain strength, has poor tear resistance, is easy to damage, has low thermal stability, and poor heat insulation effect, and is not convenient to hold when wrapping relatively hot food. Therefore, those skilled in the art provide a degradable food coating paper to solve the problems raised in the above background art. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a degradable food coating paper to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A degradable food coating paper includes a degradable upper film layer, a functional layer, a tear-resistant layer, and a degradable lower film layer;

[0007] The functional layer is composed of an upper base paper layer, a lower base paper layer, and a polylactic acid fiber mesh. The upper base paper layer is arranged on the top surface layer of the lower base paper layer, and a polylactic acid fiber mesh is arranged between the upper base paper layer and the lower base paper layer. The inner surface layers of the upper base paper layer and the lower base paper layer are equally spaced with protrusions integrally formed with the upper base paper layer and the lower base paper layer respectively. The top surface layer of the functional layer is provided with a degradable upper film layer, and an oil-proof layer is coated on the top surface layer of the degradable upper film layer. The bottom surface layer of the functional layer is provided with a tear-resistant layer, and the tear-resistant layer is specifically a PVA film layer. The bottom surface layer of the tear-resistant layer is provided with a degradable lower film layer.

[0008] As a further scheme of the utility model: An insulating adhesive layer A, an insulating adhesive layer B, and an insulating adhesive layer C are sequentially arranged between the functional layer and the degradable upper film layer, between the tear-resistant layer and between the tear-resistant layer and the degradable lower film layer. The insulating adhesive layer A, the insulating adhesive layer B, and the insulating adhesive layer C facilitate the effective connection between the structural layers and facilitate processing and production.

[0009] As a further scheme of the utility model: The insulating adhesive layer A, the insulating adhesive layer B, and the insulating adhesive layer C are all environmentally friendly starch adhesives.

[0010] As a further solution of the present utility model: both the degradable upper film layer and the degradable lower film layer are PBS film layers, which are non-toxic and harmless, easy to degrade, and have high environmental protection. They are convenient for processing and production when applied to food coating paper, and can improve the waterproof effect of the food coating paper.

[0011] As a further solution of the present utility model: the oil separation layer is specifically a polybutylene succinate coating.

[0012] As a further solution of the present utility model: both the upper base paper layer and the lower base paper layer are made of kraft paper materials.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. By using that both the degradable upper film layer and the degradable lower film layer are PBS film layers and the tear-resistant layer is specifically a PVA film layer, which are non-toxic and harmless, easy to degrade, and have high environmental protection. They are convenient for processing and production when applied to food coating paper, can improve the waterproof effect of the food coating paper, and the PVA film layer has a certain strength, significant tear-resistant effect, is not easy to damage, and is durable.

[0015] 2. By arranging a polylactic acid fiber network between the upper base paper layer and the lower base paper layer, it is convenient for biodegradation, has high thermal stability and good heat insulation effect. It is convenient to take when wrapping relatively hot food and is not easy to get burned. Due to the integrally formed protrusions on the upper base paper layer and the lower base paper layer, the voids inside the functional layer are increased, further achieving the heat insulation effect. By using that the oil separation layer is specifically a polybutylene succinate coating, the top surface layer of the food coating paper is resistant to oil stains, not easy to adhere, easy to clean, easy to degrade, and has high environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a degradable food coating paper of the present utility model.

[0017] Figure 2 It is a schematic diagram of the material layer of a degradable food coating paper of the present utility model.

[0018] Figure 3 It is a schematic diagram of the functional layer structure of a degradable food coating paper of the present utility model.

[0019] In the figure: 1, degradable upper film layer; 2, functional layer; 3, tear-resistant layer; 4, degradable lower film layer; 5, oil separation layer; 6, heat insulation adhesive layer A; 7, heat insulation adhesive layer B; 8, heat insulation adhesive layer C; 9, upper base paper layer; 10, lower base paper layer; 11, protrusion; 12, polylactic acid fiber network. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-3 , in the embodiment of the present utility model, a degradable food coating paper includes a degradable upper film layer 1, a functional layer 2, a tear-resistant layer 3 and a degradable lower film layer 4;

[0022] The functional layer 2 is composed of an upper base paper layer 9, a lower base paper layer 10 and a polylactic acid fiber mesh 12. The upper base paper layer 9 is provided on the top surface layer of the lower base paper layer 10, and the polylactic acid fiber mesh 12 is provided between the upper base paper layer 9 and the lower base paper layer 10. The inner surface layers of the upper base paper layer 9 and the lower base paper layer 10 are equidistantly provided with protrusions 11 integrally formed with the upper base paper layer 9 and the lower base paper layer 10 respectively. The degradable upper film layer 1 is provided on the top surface layer of the functional layer 2, and an oil-proof layer 5 is coated on the top surface layer of the degradable upper film layer 1. The tear-resistant layer 3 is provided on the bottom surface layer of the functional layer 2, and the tear-resistant layer 3 is specifically a PVA film layer. The degradable lower film layer 4 is provided on the bottom surface layer of the tear-resistant layer 3.

[0023] Among them, a heat-insulating adhesive layer A6, a heat-insulating adhesive layer B7 and a heat-insulating adhesive layer C8 are sequentially provided between the functional layer 2 and the degradable upper film layer 1, between the tear-resistant layer 3, and between the tear-resistant layer 3 and the degradable lower film layer 4; the heat-insulating adhesive layer A6, the heat-insulating adhesive layer B7 and the heat-insulating adhesive layer C8 facilitate the effective connection between the structural layers and facilitate processing and production.

[0024] Among them, the heat-insulating adhesive layer A6, the heat-insulating adhesive layer B7 and the heat-insulating adhesive layer C8 are all environmentally friendly starch adhesives; the environmentally friendly starch adhesives have a certain bonding effect, high environmental friendliness, non-toxic and harmless, and are convenient for processing and production.

[0025] Among them, both the degradable upper film layer 1 and the degradable lower film layer 4 are PBS film layers; they are non-toxic and harmless, easy to degrade, highly environmentally friendly, convenient for processing and production when applied to food coating paper, and improve the waterproof effect of food coating paper.

[0026] Among them, the oil-proof layer 5 is specifically a polybutylene succinate coating; it makes the top surface layer of the food coating paper resistant to oil stains, not easy to adhere, easy to clean, easy to degrade, and highly environmentally friendly.

[0027] Among them, both the upper base paper layer 9 and the lower base paper layer 10 are made of kraft paper materials; the kraft paper materials have a certain strength, are flat, clean, convenient for processing, environmentally friendly and safe.

[0028] The working principle of the present utility model is as follows: The degradable upper film layer 1 and the degradable lower film layer 4 are both PBS film layers, and the tear-resistant layer 3 is specifically a PVA film layer, which is non-toxic and harmless, easy to degrade, and has high environmental protection. It is convenient for processing and production when applied to food coating paper, improving the waterproof effect of the food coating paper. Moreover, the PVA film layer has a certain strength, remarkable tear-resistant effect, is not easily damaged, and is durable. There is a polylactic acid fiber mesh 12 arranged between the upper base paper layer 9 and the lower base paper layer 10, which is convenient for biodegradation, has high thermal stability and good heat insulation effect, and is easy to pick up when wrapping relatively hot food without getting burned easily. Due to the protrusions 11 integrally formed on the upper base paper layer 9 and the lower base paper layer 10, the voids inside the functional layer 2 are increased, further achieving the heat insulation effect. The oil separation layer 5 is specifically a polybutylene succinate coating, making the top surface layer of the food coating paper resistant to oil stains, not easily adhered, easy to clean, convenient for degradation, and having high environmental protection.

[0029] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent replacements or changes should be covered within the protection scope of the present utility model.

Claims

1. A degradable food coating paper, comprising a degradable upper film layer (1), a functional layer (2), a tear-resistant layer (3) and a degradable lower film layer (4); It is characterized in that; The functional layer (2) is composed of an upper base paper layer (9), a lower base paper layer (10) and a polylactic acid fiber mesh (12). The upper base paper layer (9) is arranged on the top surface of the lower base paper layer (10), and the polylactic acid fiber mesh (12) is arranged between the upper base paper layer (9) and the lower base paper layer (10). The inner surfaces of the upper base paper layer (9) and the lower base paper layer (10) are equidistantly provided with protrusions (11) integrally formed with the upper base paper layer (9) and the lower base paper layer (10) respectively. The degradable upper film layer (1) is arranged on the top surface of the functional layer (2), and an oil separation layer (5) is coated on the top surface of the degradable upper film layer (1). The tear-resistant layer (3) is arranged on the bottom surface of the functional layer (2), and the tear-resistant layer (3) is specifically a PVA film layer. The degradable lower film layer (4) is arranged on the bottom surface of the tear-resistant layer (3).

2. The degradable food coating paper according to claim 1, wherein: An insulating adhesive layer A (6), an insulating adhesive layer B (7) and an insulating adhesive layer C (8) are sequentially arranged between the functional layer (2) and the degradable upper film layer (1), the tear-resistant layer (3), and between the tear-resistant layer (3) and the degradable lower film layer (4).

3. The degradable food coating paper according to claim 2, wherein: The insulating adhesive layer A (6), the insulating adhesive layer B (7) and the insulating adhesive layer C (8) are all environmentally friendly starch adhesives.

4. A degradable food coating paper according to claim 1, wherein: Both the degradable upper film layer (1) and the degradable lower film layer (4) are PBS film layers.

5. A degradable food coating paper according to claim 1, characterized in that: The oil separation layer (5) is specifically a polybutylene succinate coating.

6. The degradable food coating paper according to claim 1, characterized in that: Both the upper base paper layer (9) and the lower base paper layer (10) are made of kraft paper materials.

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