Light-blocking low-oxygen permeable material and composite sheet for packaging cheese at normal temperature

Abstract

The invention relates to the technical field of cheese packaging materials, and discloses a light-blocking low-oxygen permeable material and a composite sheet for normal-temperature cheese packaging, the light-blocking low-oxygen permeable material comprises a cheese body and a protection assembly on the outer side of the cheese body, and inner panels are fixedly mounted at the top and the bottom of the protection assembly; an anti-folding strip is fixedly installed on the side, away from the protection assembly, of the inner panel, an outer panel is fixedly installed on the side, away from the inner panel, of the anti-folding strip, and the outer side of the outer panel is wrapped with an outer sealing layer. According to the light-blocking and low-oxygen-permeability material and the composite sheet for normal-temperature cheese packaging, the antioxidant can inhibit or slow down the oxidation process of the partition layer and the base layer, the service life of the packaging material is prolonged, cheese deterioration is avoided, the slipping agent is added through the base layer and the bonding layer, and in the production process, the light-blocking and low-oxygen-permeability material is obtained. And the production efficiency is improved, production faults are reduced, the practicability is high, and application and popularization are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of cheese packaging materials, in particular to a light-blocking and low-oxygen-permeable material and a composite sheet for packaging cheese at room temperature. Background Art

[0002] With the continuous improvement of science and technology, among the common dairy products, products that use milk as the main milk source, add other dairy ingredients, and adopt fermentation and concentration processes are called cheese products. According to the different moisture content of the finished cheese, it can be divided into three categories: hard, semi-hard and soft. The moisture content of hard or semi-hard cheese is 30% to 45%, and the moisture content of soft cheese is between 40% and 60%. Compared with liquid dairy products, the protein content of cheese can reach more than 24%, which is 5.5 times that of liquid dairy products. At the same time, through the addition of various important minerals and vitamins required by humans such as calcium, phosphorus, magnesium, and vitamins during the processing process, cheese has gradually become one of the main dairy products consumed by the vast majority of people in my country, especially children's cheese products with high milk calcium content that are easy to promote calcium absorption;

[0003] Conventional children's cheese products on the existing market are generally packaged in composite blister / blow-molded sheets with certain oxygen and water vapor barrier properties. Not only can the required exquisite pattern printing be achieved, but also various shapes can be achieved through molding mold design, which can better attract consumers. Therefore, composite blister / blow-molded sheet packaging has basically become the main packaging for existing cheese products, especially children's cheese products.

[0004] China invention patent publication number: CN 113334890 A, discloses: a light-blocking, low-oxygen-permeable material and a composite sheet for packaging cheese at room temperature. The light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature, the composite sheet, without reducing the requirements for the material's comprehensive performance such as processing performance, thermal performance, mechanical performance, etc., the middle blow / blister middle layer and the inner layer of the sheet are modified to have a light-blocking and barrier formula, so that the light transmittance of the composite sheet is reduced to less than 0.1%, and the oxygen transmittance is less than 1cc.m2.day, so as to improve the light-blocking and environmental oxygen barrier properties of the composite sheet. However, the light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature, although using light-blocking masterbatch and low-oxygen-permeable material, are not designed with antioxidants and lubricants, which can easily make the antioxidant performance of the overall material poor and easily affect its service life. Moreover, the light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature are not designed with an anti-deformation structure of the composite sheet, which can easily cause the cheese slices to shift during transportation, causing them to be damaged or broken, etc., and have poor practicality.

[0005] Chinese invention patent announcement number: CN221067376U, discloses: 202322581157.5 A composite sheet material for packaging cheese at room temperature. By setting buffer balls and connecting strips, the composite sheet material has a buffering function. The resilience of the buffer balls and the connecting strips can reduce the force applied to the composite sheet material by the outside world, thereby reducing the damage to the cheese wrapped by the composite sheet material, which is convenient for the transportation and sale of the cheese. However, although the composite sheet material for packaging cheese at room temperature is designed with buffer balls, it is easy to make the buffer balls more expensive during production, which is not convenient for promotion and use. Moreover, the composite sheet material for packaging cheese at room temperature is not designed with a supporting structure for the anti-folding sheet, which can easily cause the anti-folding sheet to be easily deformed, thereby causing damage to the cheese during transportation. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a light-blocking, low-oxygen-permeable material and a composite sheet for packaging cheese at room temperature. The present invention can effectively solve the problems in the prior art that the light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature use light-blocking masterbatch and low-oxygen-permeable material, but do not use antioxidants and lubricants, which may result in poor antioxidant performance of the overall material and affect its service life; the anti-deformation structure of the composite sheet is not designed, which may cause displacement of the cheese slices during transportation, resulting in damage or breakage, etc., poor practicability, and inconvenience in popularization and use.

[0007] The technical solution adopted by the present invention is: a light-blocking and low-oxygen-permeable material, which is composed of the following components: selecting food-grade polyester (PET) as a light-blocking and low-oxygen-permeable base material, and then adding light-blocking masterbatch, low-oxygen-permeable material, antioxidant and lubricant into the base material;

[0008] The light-blocking masterbatch is composed of the following ingredients:

[0009] 8 parts of fumed carbon black, 5 parts of nano cerium oxide, 3 parts of triazine ultraviolet light absorber, 1 part of antioxidant 168 and 0.5 parts of erucamide;

[0010] The low oxygen permeable material is composed of food grade polyvinylidene chloride (PVDC);

[0011] The antioxidant component is antioxidant 168 or antioxidant BHT;

[0012] The lubricant component is oleic acid amide or stearic acid amide.

[0013] Preferably, the modified carbon black is surface-treated modified gas phase carbon black or plasma-treated modified carbon black, the ultraviolet light shielding agent is nano cerium oxide or nano magnesium oxide, and the ultraviolet light absorber is triazines, cinnamate esters and oxalic acid anilides.

[0014] Through the above technical scheme, the design of the gas phase carbon black modified by surface treatment can be more evenly dispersed in the material and enhance the light blocking effect. At the same time, the surface treatment can improve the compatibility with other components. The carbon black modified by plasma treatment can improve the surface activity of carbon black and enhance its dispersibility and bonding force in the polymer. At the same time, nano cerium oxide has excellent ultraviolet absorption and scattering capabilities, which can effectively shield ultraviolet rays and protect the cheese in the package from the influence of ultraviolet rays. In addition to the ultraviolet light shielding performance, nano magnesium oxide can also improve the heat resistance and stability of the material, and the ultraviolet light absorber can effectively absorb ultraviolet rays.

[0015] Preferably, the low oxygen permeability material is specifically composed of food grade polyamide-vinyl alcohol copolymer (PA-EVOH) or polyvinyl alcohol (PVA).

[0016] Through the above technical scheme, since food-grade polyamide-vinyl alcohol copolymer (PA-EVOH) has excellent oxygen barrier properties, it can effectively prevent oxygen from entering the package, slow down the oxidation and deterioration of cheese, and extend the shelf life. While ensuring low oxygen permeability, it has certain tensile and impact resistance, so that the package is not easily damaged during transportation and storage. The polyvinyl alcohol (PVA) has a significant barrier effect on oxygen and can provide good protection for the cheese.

[0017] A composite sheet for packaging cheese at room temperature, which also includes a cheese body and a protective component adhesively mounted on the cheese body and the outside thereof, wherein inner panels are fixedly mounted on the top and bottom of the protective component, an anti-folding strip is fixedly mounted on the side of the inner panel away from the protective component, an outer panel is fixedly mounted on the side of the anti-folding strip away from the inner panel, and an outer sealing layer is wrapped around the outer side of the outer panel.

[0018] Preferably, the protective component includes a light-blocking layer, a barrier layer is arranged at the bottom of the light-blocking layer, a base layer is arranged at the other end of the barrier layer away from the light-blocking layer, an adhesive layer is arranged at the other end of the base layer away from the barrier layer, the light-blocking layer is made of light-blocking masterbatch material, and the barrier layer is made of low oxygen permeability material.

[0019] Through the above technical solution, by adding light-blocking masterbatch into the light-blocking layer, it is possible to specifically block light of specific wavelengths, especially ultraviolet light that is harmful to the quality of cheese, thereby reducing the destruction and deterioration of cheese nutrients caused by light. In addition, by adding low-oxygen-permeable materials to the barrier layer, it can effectively and significantly reduce the penetration of oxygen, minimize the contact between oxygen and cheese, and delay the oxidation reaction.

[0020] Preferably, the barrier layer and the base layer are made by adding an antioxidant, and the base layer and the adhesive layer are made by adding a lubricant.

[0021] Through the above technical solution, antioxidants can inhibit or slow down the oxidation process of the barrier layer and the base layer itself, extend the service life of the packaging material, and avoid the deterioration of cheese. By adding lubricants to the base layer and the adhesive layer, the material can move more smoothly on the equipment during the production process, thereby improving production efficiency and reducing production failures.

[0022] Preferably, the anti-folding strips are provided in a plurality, and the anti-folding strips connect the inner panel and the outer panel, and the first anti-folding column and the second anti-folding column are fixedly installed between the plurality of anti-folding strips.

[0023] Through the above technical solution, through the design of multiple anti-bending strips, the deformation resistance of the overall composite sheet can be improved, and combined with the design of the anti-bending column 1 and the anti-bending column 2, it can effectively resist the impact force on the left and right sides and improve the overall deformation resistance.

[0024] Preferably, the diameter of the anti-bending column one is greater than the diameter of the anti-bending column two, and the anti-bending column one and the anti-bending column two are made of one of food-grade rubber, food-grade silicone, polyamide and polypropylene.

[0025] Through the above technical solution, by designing the anti-bending column 2 with a smaller diameter, the overall production cost can be reduced, and the anti-bending column 1 can be squeezed to avoid deformation. At the same time, a material selected from food-grade rubber, food-grade silicone, polyamide and polypropylene can ensure the safety of the overall food.

[0026] Preferably, the adhesive layer adopts one of the composite processes of hot melt composite, extrusion composite and co-extrusion composite to achieve bonding between the various layers of the structure, and a lower baffle strip is fixedly installed on the side of the anti-folding strip close to the inner panel, and an upper baffle strip is fixedly installed on the side of the anti-folding strip close to the outer panel.

[0027] Through the above technical solution, through the design of the lower baffle and the upper baffle, the deformation resistance between the anti-folding strip and the inner panel and the outer panel can be improved, so that a triangular structure is formed between the two to avoid easy breakage.

[0028] Preferably, concave teeth are provided on both sides of the outer sealing layer, and the concave teeth are provided in equal numbers, and the multiple concave teeth are equidistantly distributed about the outer sealing layer, and the inner panel, anti-folding column one, anti-folding column two, lower baffle bar, anti-folding bar, upper baffle bar and outer panel are provided in equal numbers, and the two inner panels, anti-folding column one, anti-folding column two, lower baffle bar, anti-folding bar, upper baffle bar and outer panel are symmetrically distributed about the center line of the cheese body.

[0029] Through the above technical solution, through the design of the concave teeth, it is convenient for users to tear open the entire packaging bag during use, and the design of the two sides allows the entire packaging to be torn open from any side, thereby improving the diversity of the overall composite sheet. The symmetrical distribution allows the packaging to be evenly distributed to various components when subjected to external forces in all directions, thereby avoiding damage to the packaging due to excessive local forces, effectively protecting the cheese slices, and improving the overall stability, thereby reducing problems such as distortion and deformation caused by uneven force.

[0030] Compared with the prior art, the present invention provides a light-blocking and low-oxygen-permeable material and a composite sheet for packaging cheese at room temperature, which has the following beneficial effects:

[0031] 1. The light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature can specifically block light of a specific wavelength, especially ultraviolet light that is harmful to the quality of cheese, by adding light-blocking masterbatch to the light-blocking layer, thereby reducing the destruction and deterioration of cheese nutrients caused by light. In addition, the addition of low-oxygen-permeable material to the barrier layer can effectively and significantly reduce the penetration of oxygen, minimize the contact between oxygen and cheese, and delay the oxidation reaction;

[0032] 2. The light-blocking and low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature, the antioxidant can inhibit or slow down the oxidation process of the partition layer and the base layer itself, prolong the service life of the packaging material, and avoid the deterioration of the cheese. In addition, by adding a lubricant to the base layer and the adhesive layer, the material can move more smoothly on the equipment during the production process, improve production efficiency, and reduce production failures;

[0033] 3. The light-blocking, low-oxygen-permeable material and the composite sheet for packaging cheese at room temperature can improve the deformation resistance of the overall composite sheet through the design of multiple anti-folding strips, and can effectively resist the impact force on the left and right sides by cooperating with the design of the anti-folding column 1 and the anti-folding column 2, thereby improving the overall deformation resistance. The design of the anti-folding column 2 with a smaller diameter can reduce the overall production cost and squeeze the anti-folding column 1 to avoid deformation. At the same time, a material selected from food-grade rubber, food-grade silicone, polyamide and polypropylene can ensure the safety of the overall food.

[0034] 4. The light-blocking, low-oxygen-permeable material and the composite sheet used for packaging cheese at room temperature can improve the deformation resistance between the anti-folding strip and the inner panel and the outer panel through the design of the lower baffle and the upper baffle, so that a triangular structure is formed between the two to avoid easy breakage and damage to the cheese. The double protection can improve its protectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the separation structure of the protection component and the inner panel of the present invention;

[0039] Figure 5 This is a schematic diagram of the split structure of the inner panel and the outer panel of the present invention;

[0040] Figure 6 This is a schematic diagram of the split structure of the anti-folding strip 1 and the anti-folding strip 2 of the present invention;

[0041] Figure 7 The cross-sectional structure of the protection component of the present invention is shown in FIG. Figure 1 ;

[0042] Figure 8 The cross-sectional structure of the protection component of the present invention is shown in FIG. Figure 1 .

[0043] Among them: 1. Cheese body; 2. Protection component; 201. Light-blocking layer; 202. Partition layer; 203. Base layer; 204. Adhesive layer; 3. Inner panel; 4. Anti-folding column one; 5. Anti-folding column two; 6. Lower baffle; 7. Anti-folding strip; 8. Upper baffle; 9. Outer panel; 10. Outer sealing layer; 11. Concave teeth. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Embodiment 1: Figure 1-8 As shown, the light-blocking and low-oxygen-permeable material provided by the present invention is composed of the following components: food-grade polyester (PET) is selected as the light-blocking and low-oxygen-permeable base material, and then light-blocking masterbatch, low-oxygen-permeable material, antioxidant and lubricant are added to the base material;

[0046] Light blocking masterbatch is composed of the following ingredients:

[0047] 8 parts of fumed carbon black, 5 parts of nano cerium oxide, 3 parts of triazine ultraviolet light absorber, 1 part of antioxidant 168 and 0.5 parts of erucamide;

[0048] The composition of the low oxygen permeable material is food grade polyvinylidene chloride (PVDC);

[0049] The antioxidant ingredient is antioxidant 168 or antioxidant BHT;

[0050] The lubricant component is oleamide or stearamide.

[0051] Specifically, the modified carbon black is surface-treated modified gas phase carbon black or plasma-treated modified carbon black, the ultraviolet light shielding agent is nano cerium oxide or nano magnesium oxide, and the ultraviolet light absorber is triazines, cinnamate esters and oxalic acid anilides.

[0052] The advantage is that the design of the gas phase carbon black modified by surface treatment can be more evenly dispersed in the material and enhance the light blocking effect. At the same time, the surface treatment can improve the compatibility with other components. The carbon black modified by plasma treatment can improve the surface activity of carbon black and enhance its dispersibility and bonding force in the polymer. At the same time, nano cerium oxide has excellent ultraviolet absorption and scattering capabilities, which can effectively shield ultraviolet rays and protect the cheese in the package from the influence of ultraviolet rays. In addition to the ultraviolet light shielding performance, nano magnesium oxide can also improve the heat resistance and stability of the material, and the ultraviolet light absorber can effectively absorb ultraviolet rays.

[0053] Specifically, the component of the low oxygen permeability material is food grade polyamide-vinyl alcohol copolymer (PA-EVOH) or polyvinyl alcohol (PVA).

[0054] The advantage is that food-grade polyamide-vinyl alcohol copolymer (PA-EVOH) has excellent oxygen barrier properties, which can effectively prevent oxygen from entering the package, slow down the oxidation and deterioration of cheese, and extend the shelf life. While ensuring low oxygen permeability, it has certain tensile and impact resistance, making the package not easily damaged during transportation and storage. The polyvinyl alcohol (PVA) has a significant oxygen barrier effect and can provide good protection for the cheese.

[0055] Embodiment 2: Figure 2-8 As shown, as an improvement over the previous embodiment, a composite sheet for packaging cheese at room temperature also includes a cheese body 1, and a protective component 2 adhesively mounted to the cheese body 1 and the outer side thereof, an inner panel 3 is fixedly mounted on the top and bottom of the protective component 2, an anti-folding strip 7 is fixedly mounted on the side of the inner panel 3 away from the protective component 2, an outer panel 9 is fixedly mounted on the side of the anti-folding strip 7 away from the inner panel 3, and an outer sealing layer 10 is wrapped around the outer side of the outer panel 9.

[0056] Specifically, the protection component 2 includes a light-blocking layer 201, a barrier layer 202 is arranged at the bottom of the light-blocking layer 201, a base layer 203 is arranged at the other end of the barrier layer 202 away from the light-blocking layer 201, and an adhesive layer 204 is arranged at the other end of the base layer 203 away from the barrier layer 202. The light-blocking layer 201 is made of a light-blocking masterbatch material, and the barrier layer 202 is made of a low-oxygen-permeable material. The advantage is that by adding the light-blocking masterbatch to the light-blocking layer 201, light of specific wavelengths can be blocked in a targeted manner, especially ultraviolet light that is harmful to the quality of cheese, thereby reducing the destruction and deterioration of the nutritional components of the cheese caused by light, and the barrier layer 202 is added with a low-oxygen-permeable material, which can effectively and significantly reduce the penetration of oxygen, minimize the contact between oxygen and cheese, and delay the oxidation reaction.

[0057] Specifically, the barrier layer 202 and the base layer 203 are made of an antioxidant, and the base layer 203 and the adhesive layer 204 are made of a lubricant. The advantage is that the antioxidant can inhibit or slow down the oxidation process of the barrier layer 202 and the base layer 203 themselves, extend the service life of the packaging material, and avoid the deterioration of the cheese. In addition, by adding the lubricant to the base layer 203 and the adhesive layer 204, the material can move more smoothly on the equipment during the production process, thereby improving production efficiency and reducing production failures.

[0058] Embodiment 3: Figure 2-8 As shown, as an improvement to the previous embodiment.

[0059] Specifically, a plurality of anti-folding strips 7 are provided, and the anti-folding strips 7 connect the inner panel 3 and the outer panel 9, and anti-folding columns 1 4 and 2 5 are fixedly installed between the plurality of anti-folding strips 7. The advantage is that the design of the plurality of anti-folding strips 7 can improve the deformation resistance of the overall composite sheet, and combined with the design of the anti-folding columns 1 4 and 2 5, it can effectively resist the impact force on the left and right sides, thereby improving the overall deformation resistance.

[0060] Specifically, the diameter of the anti-bending column 1 4 is larger than the diameter of the anti-bending column 2 5, and the anti-bending column 1 4 and the anti-bending column 2 5 are made of one of food-grade rubber, food-grade silicone, polyamide PA and polypropylene PP. The advantage is that the design of the anti-bending column 2 5 with a smaller diameter can not only reduce the overall production cost, but also squeeze the anti-bending column 1 4 to avoid deformation. At the same time, one of the food-grade rubber, food-grade silicone, polyamide PA and polypropylene PP materials can ensure the safety of the overall food.

[0061] Embodiment 4: Figure 2-8 As shown, as an improvement to the previous embodiment.

[0062] Specifically, the adhesive layer 204 adopts one of the composite processes of hot melt composite, extrusion composite and co-extrusion composite to achieve the bonding between the various layers of the structure. The anti-folding strip 7 is fixedly installed with a lower baffle 6 on the side close to the inner panel 3, and the anti-folding strip 7 is fixedly installed with an upper baffle 8 on the side close to the outer panel 9. The advantage is that through the design of the lower baffle 6 and the upper baffle 8, the deformation resistance between the anti-folding strip 7 and the inner panel 3 and the outer panel 9 can be improved, so that a triangular structure is formed between the two to avoid easy breakage.

[0063] Specifically, concave teeth 11 are provided on both sides of the outer sealing layer 10, and the concave teeth 11 are arranged in the same number, and the multiple concave teeth 11 are equidistantly distributed about the outer sealing layer 10, and the inner panel 3, anti-folding column 1 4, anti-folding column 2 5, lower baffle 6, anti-folding bar 7, upper baffle 8 and outer panel 9 are arranged in the same number, and the two inner panels 3, anti-folding column 1 4, anti-folding column 2 5, lower baffle 6, anti-folding bar 7, upper baffle 8 and outer panel 9 are symmetrically distributed about the center line of the cheese body 1. The advantage is that the design of the concave teeth 11 can facilitate the user to tear open the entire packaging bag during use, and the design on both sides can tear open the entire packaging from any side, thereby improving the diversity of the entire composite sheet, and the symmetrical distribution allows the packaging to be evenly dispersed to each component when subjected to external forces in all directions, thereby avoiding damage to the packaging due to excessive local forces, effectively protecting the cheese slices, and improving the overall stability, reducing problems such as distortion and deformation caused by uneven force.

[0064] Working principle: When in use, by adding light-blocking masterbatch to the light-blocking layer 201, it is possible to specifically block light of specific wavelengths, especially ultraviolet light that is harmful to the quality of cheese, thereby reducing the destruction and deterioration of cheese nutrients caused by light, and the addition of low oxygen permeability materials to the partition layer 202 can effectively and significantly reduce the penetration of oxygen, minimize the contact between oxygen and cheese, and delay the oxidation reaction. The antioxidant can inhibit or slow down the oxidation process of the partition layer 202 and the base layer 203 itself, extend the service life of the packaging material, and avoid causing the cheese to deteriorate. In addition, by adding a lubricant to the base layer 203 and the adhesive layer 204 during the production process, the material can be moved more smoothly on the equipment, thereby improving production efficiency and reducing production failures. The design of multiple anti-folding strips 7 can improve the deformation resistance of the overall composite sheet. The anti-bending column 1 4 and the anti-bending column 2 5 can effectively resist the impact force on the left and right sides and improve the overall anti-deformation ability. The design of the anti-bending column 2 5 with a smaller diameter can not only reduce the overall production cost, but also squeeze the anti-bending column 1 4 to avoid deformation. At the same time, a material selected from food-grade rubber, food-grade silicone, polyamide PA and polypropylene PP can ensure the safety of the overall food. The design of the lower baffle 6 and the upper baffle 8 can improve the anti-deformation ability between the anti-bending strip 7 and the inner panel 3 and the outer panel 9, so that a triangular structure is formed between the two to avoid easy breakage. The design of the concave teeth 11 can facilitate the user to tear open the overall packaging bag when using it, and the design of the two sides can tear open the overall packaging from any side, thereby improving the diversity of the overall composite sheet.

[0065] 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 light-blocking and low oxygen-permeable material, characterized in that: The method comprises the following components: selecting food-grade polyester (PET) as a basic material of light-blocking and low oxygen-permeability, and then adding light-blocking masterbatch, low oxygen-permeability material, antioxidant and lubricant into the basic material; The light-blocking masterbatch is composed of the following ingredients: 8 parts of fumed carbon black, 5 parts of nano cerium oxide, 3 parts of triazine ultraviolet light absorber, 1 part of antioxidant 168 and 0.5 parts of erucamide; The low oxygen permeable material is composed of food grade polyvinylidene chloride (PVDC); The antioxidant component is antioxidant 168 or antioxidant BHT; The lubricant component is oleic acid amide or stearic acid amide.

2. The light-blocking and low oxygen-permeable material according to claim 1, characterized in that: The modified carbon black is one of surface-treated modified gas phase carbon black or plasma-treated modified carbon black; the ultraviolet light shielding agent is one of nano cerium oxide or nano magnesium oxide; the ultraviolet light absorber is one of triazines, cinnamate and oxalic acid anilide.

3. The light-blocking and low oxygen-permeable material according to claim 2, characterized in that: The component of the low oxygen permeability material is specifically one of food grade polyamide-vinyl alcohol copolymer (PA-EVOH) or polyvinyl alcohol (PVA).

4. A composite sheet for packaging room temperature cheese, characterized in that: It comprises a light-blocking and low-oxygen-permeable material as described in any one of claims 1 to 3, and also comprises a cheese body (1), and a protective component (2) adhesively mounted on the cheese body (1) and the outer side thereof, wherein the top and bottom of the protective component (2) are fixedly mounted with an inner panel (3), a side of the inner panel (3) away from the protective component (2) is fixedly mounted with an anti-folding strip (7), a side of the anti-folding strip (7) away from the inner panel (3) is fixedly mounted with an outer panel (9), and the outer side of the outer panel (9) is wrapped with an outer sealing layer (10).

5. The composite sheet for packaging room temperature cheese according to claim 4, characterized in that: The protective component (2) comprises a light-blocking layer (201), a barrier layer (202) is arranged at the bottom of the light-blocking layer (201), a base layer (203) is arranged at the other end of the barrier layer (202) away from the light-blocking layer (201), and an adhesive layer (204) is arranged at the other end of the base layer (203) away from the barrier layer (202), the light-blocking layer (201) is made of a light-blocking masterbatch material, and the barrier layer (202) is made of a low oxygen permeability material.

6. The composite sheet for packaging room temperature cheese according to claim 5, characterized in that: The barrier layer (202) and the base layer (203) are made by adding an antioxidant, and the base layer (203) and the adhesive layer (204) are made by adding a lubricant.

7. The composite sheet for packaging room temperature cheese according to claim 4, characterized in that: The anti-folding strips (7) are provided in a plurality of the same number, and the anti-folding strips (7) connect the inner panel (3) and the outer panel (9), and an anti-folding column 1 (4) and an anti-folding column 2 (5) are fixedly installed between the plurality of anti-folding strips (7).

8. The composite sheet for packaging room temperature cheese according to claim 7, characterized in that: The diameter of the anti-bending column 1 (4) is greater than the diameter of the anti-bending column 2 (5), and the anti-bending column 1 (4) and the anti-bending column 2 (5) are made of one of food-grade rubber, food-grade silicone, polyamide (PA) and polypropylene (PP).

9. A composite sheet for packaging room temperature cheese according to claims 4 and 5, characterized in that: The adhesive layer (204) is bonded together by a composite process selected from the group consisting of hot melt composite, extrusion composite and co-extrusion composite. A lower baffle (6) is fixedly mounted on the side of the anti-folding strip (7) close to the inner panel (3), and an upper baffle (8) is fixedly mounted on the side of the anti-folding strip (7) close to the outer panel (9).

10. The composite sheet for packaging room temperature cheese according to claim 4, characterized in that: The outer sealing layer (10) is provided with concave teeth (11) on both sides, and the concave teeth (11) are provided in equal numbers, and the multiple concave teeth (11) are equidistantly distributed with respect to the outer sealing layer (10); the inner panel (3), the first anti-folding column (4), the second anti-folding column (5), the lower baffle (6), the anti-folding bar (7), the upper baffle (8) and the outer panel (9) are provided in equal numbers, and the two inner panels (3), the first anti-folding column (4), the second anti-folding column (5), the lower baffle (6), the anti-folding bar (7), the upper baffle (8) and the outer panel (9) are symmetrically distributed with respect to the center line of the cheese body (1).

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