A food deoxidizing bottle cap

Abstract

The application relates to the technical field of food oxidants, in particular to a food deoxidizing bottle cap which comprises a bottle cap main body and a deoxidizing agent assembly, the deoxidizing agent assembly is detachably connected with the bottle cap main body; the bottle cap main body comprises a cap body and a top pressing piece which is combined with the cap body, a support plate and a liquid outlet pipe are arranged on the inner wall of the cap body, and the liquid outlet pipe penetrates through the support plate; the deoxidizing agent assembly comprises a fixing piece, a deoxidizing piece and a sealing piece, the fixing piece is used for fixing the deoxidizing piece, the deoxidizing piece is connected with the fixing piece, one side of the deoxidizing piece away from the fixing piece is connected with the sealing piece, the sealing piece is abutted with the support plate when the deoxidizing agent assembly is installed in the cap body, and the deoxidizing piece faces the support plate; the deoxidizing piece is composed of a packaging bag and a deoxidizing agent arranged in the packaging bag, the packaging bag is prepared by a composite film, and the composite film comprises PET film, PAP film, PTF film and PE film in sequence; the food deoxidizing bottle cap can effectively reduce the oxygen content in the bottle, and reduce the possibility of oxidation and metamorphosis of liquid seasoning due to the existence of air in the bottle.

Description

Technical Field

[0001] This application relates to the field of food oxidant technology, and more specifically, to a deoxygenating bottle cap for food. Background Technology

[0002] People often use liquid seasonings such as soy sauce, oyster sauce, rice wine, vinegar, and various oils when cooking. These liquid seasonings are usually stored in bottles to effectively reduce the surface area exposed to air, thus slowing down oxidation. However, people often overlook the fact that the liquid seasonings stored in the bottles are not used up quickly. The repeated opening and closing of the bottle during use allows outside air to continuously enter, causing the liquid inside to constantly come into contact with air, accelerating oxidation and leading to spoilage. Summary of the Invention

[0003] In order to improve the problem of outside air constantly entering the bottle and causing the liquid seasoning inside the bottle to oxidize and deteriorate, this application provides a food-grade deoxidizing bottle cap.

[0004] This application provides a deoxygenated bottle cap for food use, employing the following technical solution:

[0005] A food-grade deoxidizing bottle cap includes a cap body and a deoxidizing agent assembly, wherein the deoxidizing agent assembly is detachably connected to the cap body. The cap body includes a cap body and a pressing member that fits onto the cap body. A support plate and a liquid outlet pipe are provided on the inner wall of the cap body, and the liquid outlet pipe passes through the support plate. The deoxidizing agent assembly includes a fixing member, a deoxidizing member, and a sealing member. The fixing member is used to fix the deoxidizing member, and the deoxidizing member is connected to the fixing member. The side of the deoxidizing member away from the fixing member is connected to the sealing member. When the deoxidizing unit is installed inside the cap body, the sealing member abuts against the support plate, and the deoxidizing member faces the support plate. The deoxidizing member is composed of a packaging bag and a deoxidizing agent located inside the packaging bag. The packaging bag is made of a composite film, wherein the composite film sequentially includes a PET film, a PAP film, a PTF film, and a PE film.

[0006] By adopting the above technical solution, the oxygen content inside the bottle can be effectively reduced, thus decreasing the possibility of oxidation and deterioration of the liquid seasoning due to air inside the bottle. When a liquid seasoning bottle is opened, air enters each time it is opened, increasing the contact time between the liquid seasoning and air, accelerating its deterioration. The oxygen absorber component on the bottle cap serves two purposes: absorbing air from inside the bottle and facilitating replacement of the oxygen absorber. The inner wall of the cap is equipped with a support plate and a dispensing pipe. The support plate supports the oxygen absorber component, preventing it from falling off, while the dispensing pipe discharges the liquid seasoning. The dispensing pipe reduces the amount of outside air entering the bottle and, combined with the oxygen absorber, consumes any oxygen that enters, thereby reducing residual oxygen inside the bottle and preventing oxidation and deterioration of the liquid seasoning. A fixing component secures the oxygen absorber component, preventing it from falling or shifting during use, and a sealing component prevents liquid from leaking out of the bottle.

[0007] The packaging bag in the deoxidizing component is made of a composite of PET film, PAP film, PTF film and PE film. It has the effects of being breathable, waterproof and oil-proof. Moreover, the surface of the composite film is not easy for substances to adhere to. Air can penetrate the packaging bag and react with the deoxidizing agent, thereby preventing the liquid seasoning in the bottle from oxidizing and deteriorating.

[0008] Liquid seasonings contain various acids, alkalis, salts, oils, and starches, which easily adhere to the surface of PET films. Once these substances adhere to the PET film surface, they can easily clog it, causing it to become airtight. Therefore, PET films need to prevent substances from adhering to their surfaces. In this application, the surface of the PET film is not prone to adhesion, and the liquid seasoning inside the bottle will not adhere to the surface of the composite film, effectively preventing clogging and airtightness, and improving the oxygen removal effect.

[0009] The deoxidizer component in this application is replaceable, and the cap is recyclable, which reduces resource waste.

[0010] Preferably, the PET film is prepared by the following method:

[0011] 1) First, dissolve chitosan in acetic acid, heat to 40-50℃, add acetic anhydride and stir to obtain a viscous liquid, then place the viscous liquid in ice water until no precipitate is produced, filter, remove the filter residue, dry, and obtain esterified chitosan.

[0012] 2) PET, polyethylene, inorganic filler, surfactant and esterified chitosan are mixed and processed by blending extrusion to obtain composite material A, and then processed by granulation to obtain composite material particles A.

[0013] 3) Polytetrafluoroethylene and silane coupling agent are mixed and processed by blending extrusion to obtain composite material B, which is then processed by granulation to obtain composite material particles B.

[0014] 4) Composite material particles A and composite material particles B are mixed and processed by blending extrusion to obtain composite material C. Then, composite material particles C are processed by granulation. Composite material particles C are blown film extrusion, stretching and shaping to obtain a breathable film.

[0015] The PET film prepared using the above technical solution possesses good air permeability, water and oil resistance, and is not prone to surface adhesion. Polytetrafluoroethylene (PTFE) is used in the film preparation, resulting in excellent corrosion resistance, weather resistance, oxidation resistance, and air permeability. When used in the preparation of deoxidizer packaging bags, it improves the air permeability and corrosion resistance of the packaging bags. However, PTFE films are permeable to water, and their surface can adhere to sticky substances, easily becoming clogged and unable to breathe. To address this, this application adds polyethylene, inorganic fillers, surfactants, chitosan, and silane coupling with PTFE to prepare the PET film. This results in a PET film with good air permeability, as well as good water and oil resistance and anti-adhesion properties, making the PET film less prone to clogging and becoming impermeable.

[0016] Polyethylene has poor water absorption and adhesion. When it is used in conjunction with polytetrafluoroethylene to prepare PET film, it can improve the waterproof performance of PET film, reduce the surface adhesion performance of PET film, and at the same time, it does not affect the air permeability of PET film.

[0017] Esterified chitosan can further improve the air permeability and anti-stick properties of PET film. Esterified chitosan can form a stable network structure with polytetrafluoroethylene, PET, and polyethylene, thereby improving the air permeability and anti-stick properties of PET film.

[0018] Surfactants can improve the hydrophobicity and oleophobicity of PET film surfaces, enhance the self-cleaning ability of PET film surfaces, reduce the adhesion of liquid seasonings to PET film surfaces, and prevent PET film from becoming clogged and impermeable.

[0019] Silane coupling agents enable polytetrafluoroethylene, polyethylene, and chitosan to be linked with inorganic fillers to form structurally stable PET films.

[0020] Preferably, the polytetrafluoroethylene has a molecular weight of 100,000-150,000 and a density of 2.1-2.3 g / cm³. 3 .

[0021] Preferably, the melt temperature of the melting stage in step 4) of the blown film extrusion process is 350-370℃, and the shaping temperature is 130-150℃.

[0022] By controlling the melt temperature and setting temperature during the melting stage of the blown film extrusion process, the air permeability of the PET film can be controlled, improving air permeability efficiency and preventing water and oil from entering the PET film.

[0023] Preferably, the raw materials used to prepare the PET film are in the following weight proportions:

[0024] 30-40 PET samples

[0025] 20-30 parts of polytetrafluoroethylene

[0026] 10-15 parts of polyethylene

[0027] 5-10 parts of inorganic filler

[0028] 6-10 parts of surfactant

[0029] 4-8 parts chitosan

[0030] 5-10 parts acetic acid

[0031] 3-5 parts acetic anhydride

[0032] 2-4 parts of silane coupling agent.

[0033] By adopting the above technical solution, the amount of raw materials used in the preparation of PET film is optimized, thereby further improving the air permeability, waterproof and oil-proof properties, and non-stick properties of PET film.

[0034] Preferably, the polyethylene is obtained by mixing low-density polyethylene and high-density polyethylene in a weight ratio of 1:(1-3).

[0035] By adopting the above technical solution, the waterproof and anti-stick properties of PET film are further improved. Specifically, by combining low-density polyethylene and high-density polyethylene, the waterproof and anti-stick properties of the PET film are enhanced while ensuring uniform mixing of polytetrafluoroethylene with the low-density and high-density polyethylene.

[0036] Preferably, the low-density polyethylene has a melt index of 0.3-1.2 g / 10 min and a density of 0.910-0.940 g / cm³. 3 The melt flow index of high-density polyethylene is 5-8 g / 10 min, and its density is 0.950-0.970 g / cm³. 3 .

[0037] By adopting the above technical solution, the melt index and density of low-density polyethylene and high-density polyethylene are optimized, thereby improving the compatibility of low-density polyethylene, high-density polyethylene and polytetrafluoroethylene, and thus improving the air permeability, waterproof and oil-proof performance and non-stick performance of PET film.

[0038] Preferably, the surfactant is prepared by mixing a hydrophobic surfactant and an oleophobic surfactant in a weight ratio of 3:(1-3);

[0039] The hydrophobic surfactant is at least one of polydimethylsiloxane, polyvinyl alcohol or stearic acid, and at least one of oleophobic surfactants, polysorbate or fatty alcohol oxyethylene ether.

[0040] By adopting the above technical solutions, the waterproof and oil-proof performance of PET film can be further improved. Hydrophobic surfactants can improve the waterproof ability of PET film, and oleophobic surfactants can improve the oil-proof ability of PET film. The two work together to make it difficult for liquid seasonings to adhere to the surface of PET film, which helps to prevent PET film from clogging.

[0041] Preferably, the inorganic filler is at least one of silicon dioxide, titanium dioxide, calcium carbonate, calcium oxide, talc, calcium hydroxide, or corundum powder.

[0042] By adopting the above technical solution, the air pores generated in the PET film are made uniform and dense, which improves the air permeability of the PET film and also increases the strength of the PET film, making it less prone to damage.

[0043] Preferably, the pore density of the PAP membrane is 400-500 pores / cm³. 2 The pore density of the PTF membrane is 500-600 pores / cm³. 2 The PE film has a pore density of 500-600 pores / cm³. 2 .

[0044] By adopting the above technical solutions and optimizing the pore density of PET film, PAP film and PTF film, the air permeability of the composite film can be further improved. At the same time, PKF film and PET film can improve the toughness and strength of the composite film, improve the impact resistance of the composite film, make the composite film less prone to damage, and prevent the deoxidizer from leaking out.

[0045] Preferably, the thickness ratio of the PET film, the PAP film, the PTF film and the PE film is 1:(1-2):(0.5-1):1.

[0046] By adopting the above technical solutions and reasonably optimizing the thickness of PET film, PAP film, PTF film and PET film, the composite film has good air permeability, water and oil resistance, anti-clogging properties, strength and toughness.

[0047] In summary, this application has the following beneficial effects:

[0048] 1. This application, by preparing the oxygen absorber component and the cap body into a food-grade oxygen absorber cap, can effectively reduce the oxygen content inside the bottle, thereby reducing the possibility of liquid seasonings oxidizing and deteriorating due to air inside the bottle. Specifically, the packaging bag for the oxygen absorber component is made of a composite of PET film, PAP film, PTF film, and PE film, providing breathability, waterproofing, and oil resistance. Furthermore, the surface of the composite film is not easily adhered to by substances, allowing air to penetrate the packaging bag and react with the oxygen absorber, thus preventing the liquid seasonings inside the bottle from oxidizing and deteriorating.

[0049] 2. In this application, PET film is prepared by combining chitosan, acetic acid, acetic anhydride, polytetrafluoroethylene, polyethylene, inorganic filler, surfactant and silane coupling agent. This improves the gas properties, water and oil resistance and the ability of the PET film to resist the adhesion of substances on the surface. This allows the PET film to be breathable quickly and will not be clogged by contact with liquid seasonings. Attached Figure Description

[0050] Figure 1 This is a three-dimensional structural diagram of a deoxygenated bottle cap for food use in Example 1.

[0051] Figure 2 This is a schematic diagram of the exploded structure of the deoxidizer assembly.

[0052] Reference numerals in the attached drawings: 1. Bottle cap body; 11. Cap body; 12. Top pressure component; 2. Support plate; 3. Liquid outlet pipe; 4. Deoxidizer assembly; 41. Fixing component; 42. Deoxidizer component; 43. Sealing component. Detailed Implementation

[0053] Preparation Examples 1-3

[0054] The polytetrafluoroethylene used in this preparation example has a molecular weight of 100,000 and a density of 2.1 g / cm³. 3 PET has a water absorption of 0.06%, an impact strength of 64.1 J / m, a Rockwell hardness of M 90, and an elongation of 2.7%.

[0055] Preparation Example 1

[0056] A PET film is prepared by the following method:

[0057] 1) First, dissolve 0.40 kg of chitosan in 0.50 kg of acetic acid, heat to 40°C, add 0.30 kg of acetic anhydride and stir to obtain a viscous liquid. Then place the viscous liquid in ice water until no precipitate is formed. Filter, remove the filter residue, and dry to obtain esterified chitosan.

[0058] 2) 0.30 kg of PET, 0.10 kg of polyethylene, 0.50 kg of inorganic filler (silica), 0.60 kg of surfactant (polydimethylsiloxane and polysorbate in a mass ratio of 3:1) and esterified chitosan were mixed and composite material A was obtained by blending and extrusion process, and then composite material particles A were obtained by granulation process.

[0059] 3) Mix 2.00 kg of polytetrafluoroethylene and 0.20 kg of silane coupling agent (methacryloyloxysilane), and obtain composite material B through a blending extrusion process, and then obtain composite material particles B through a granulation process;

[0060] 4) Composite material particles A and composite material particles B are mixed and processed by blending extrusion to obtain composite material C. Then, composite material particles C are processed by granulation. Composite material particles C are blown film extrusion, stretching and shaping to obtain a breathable film.

[0061] The melt temperature during the melting stage of the blown film extrusion process is 350℃, and the setting temperature is 130℃.

[0062] The difference between Preparation Example 2-3 and Preparation Example 1 is that the types and amounts of some raw materials and some experimental parameters are different from those in Preparation Example 1, while the remaining experimental steps are the same as those in Preparation Example 1.

[0063] The raw materials and amounts used in Preparation Examples 1-3 are shown in Table 1:

[0064] Table 1. Materials and quantities used in preparation examples 1-3

[0065]

[0066]

[0067] In Preparation Example 2, the weight ratio of polyvinyl alcohol to fatty alcohol oxyethylene ether was 3:2, and in Preparation Example 3, the weight ratio of stearic acid to polysorbate was 3:3.

[0068] In Preparation Example 1, the polyethylene was low-density polyethylene, with a melt index of 0.3 g / 10 min and a density of 0.940 g / cm³. 3 .

[0069] In Preparation Example 2, the polyethylene was high-density polyethylene with a melt index of 5 g / 10 min and a density of 0.950 g / cm³. 3 .

[0070] In Preparation Example 2, the mass ratio of titanium dioxide to calcium carbonate was 1:1.

[0071] In Preparation Example 3, the polyethylene was obtained by mixing low-density polyethylene and high-density polyethylene in a weight ratio of 1:1. The low-density polyethylene had a melt index of 1.2 g / 10 min and a density of 0.910 g / cm³. 3 The melt flow index of high-density polyethylene is 8 g / 10 min, and its density is 0.970 g / cm³. 3 .

[0072] Preparation Example 4

[0073] A PET film, the difference between this preparation example and preparation example 3 is that the polyethylene is obtained by mixing low-density polyethylene and high-density polyethylene in a weight ratio of 1:3, the low-density polyethylene has a melt index of 0.2 g / 10 min and a density of 0.920 g / cm³. 3 The melt flow index of high-density polyethylene is 6 g / 10 min, and its density is 0.960 g / cm³. 3 .

[0074] Preparation Example 5

[0075] A PET film, the difference between this preparation example and preparation example 3 is that the polyethylene is obtained by mixing low-density polyethylene and high-density polyethylene in a weight ratio of 5:3, the low-density polyethylene has a melt index of 0.2 g / 10 min and a density of 0.920 g / cm³. 3 The melt flow index of high-density polyethylene is 6 g / 10 min, and its density is 0.960 g / cm³. 3 .

[0076] Preparation of comparative examples

[0077] Preparation of Comparative Example 1

[0078] A PET film, the difference between this preparation example and preparation example 1 is that chitosan is used instead of an equal amount of esterified chitosan, while the other raw material types, amounts and experimental steps are the same as in preparation example 1.

[0079] Preparation of Comparative Example 2

[0080] A PET film is prepared in this example, which differs from Preparation Example 1 in that polypropylene is used instead of an equal amount of polyethylene. The other raw material types, amounts, and experimental procedures are the same as in Preparation Example 1.

[0081] The melt flow index of polypropylene is 1.7 g / 10 min, and its density is 0.910 g / cm³. 3 .

[0082] Preparation of Comparative Example 3

[0083] A PET film, the difference between this preparation example and preparation example 1 is that chitin is used instead of an equal amount of esterified chitosan, while the other raw material types, amounts and experimental steps are the same as in preparation example 1.

[0084] Preparation of Comparative Example 4

[0085] A PET film, the difference between this preparation example and preparation example 1 is that polyethylene, inorganic filler, surfactant, esterified chitosan, polytetrafluoroethylene and silane coupling agent are mixed and processed by blending extrusion to obtain composite material D, and then processed by granulation to obtain composite material particles D. The composite material particles D are then subjected to blown film extrusion, stretching and shaping treatment to obtain a breathable film.

[0086] The process parameters for obtaining composite material D through blending extrusion and then obtaining composite material particles D through granulation are consistent with those in step 2) of the preparation example.

[0087] Example

[0088] The deoxidizer used in this application is an iron-based deoxidizer.

[0089] Example 1

[0090] A food-grade deoxygenated bottle cap, reference Figure 1 The system includes a bottle cap body 1 and an oxygen absorber assembly 4, the oxygen absorber assembly 4 being detachably connected to the bottle cap body 1. The bottle cap body 1 includes a cap 11 and a pressing member 12 that fits onto the cap 11. A support plate 2 and a liquid outlet pipe 3 are connected to the inner wall of the cap 11, the liquid outlet pipe 3 passing through the support plate 2; see reference... Figure 2 and combined Figure 1 The deoxidizer assembly 4 includes a fixing member 41, a deoxidizer 42, and a sealing member 43. The sealing member 43 is connected to the fixing member 41, and the deoxidizer 42 is connected to the fixing member 41. The side of the deoxidizer 42 away from the fixing member 41 is connected to the sealing member 43. When the deoxidizer assembly 4 is installed inside the cover 11, the sealing member 43 abuts against the support plate 2, and the deoxidizer 42 faces the support plate 2.

[0091] The deoxidizing component 42 consists of a packaging bag and a deoxidizing agent located inside the packaging bag. The packaging bag is prepared from a composite film, which includes a PET film, a PKF film, and a PET film in sequence, wherein the PET film comes from Preparation Example 1.

[0092] The PAP membrane has a pore density of 400 pores / cm³. 2 The pore density of the PTF membrane is 500 pores / cm³. 2 The pore density of the PE film is 600 pores / cm³. 2 .

[0093] The thickness ratio of PET film, PKF film and PET film is 1:1:0.5:1.

[0094] The difference between Examples 2-9 and Example 1 is that the source of the PET film is different from that in Example 1; the remaining experimental procedures are the same as in Example 1. The sources of the PET film in Examples 1-8 are shown in Table 2:

[0095] Table 2 Sources of PET films in Examples 1-9

[0096]

[0097]

[0098] Example 10

[0099] A deoxygenated bottle cap for food use, the difference between this embodiment and Embodiment 1 is that the PAP membrane pore density is 500 pores / cm³. 2 The pore density of the PTF membrane is 600 pores / cm³. 2 The pore density of the PE film is 500 pores / cm³. 2 The remaining experimental steps are the same as in Example 1.

[0100] Example 11

[0101] A deoxygenated bottle cap for food use. The difference between this embodiment and Embodiment 1 is that the thickness ratio of PET film, PAP film, PTF film and PE film is 1:2:1:1, while the rest of the test steps are the same as in Embodiment 1.

[0102] Example 12

[0103] A deoxygenated bottle cap for food use. The difference between this embodiment and Embodiment 1 is that the PET film is a commercially available PET film, while the rest of the test steps are the same as in Embodiment 1.

[0104] Comparative Example

[0105] Comparative Example 1

[0106] A deoxygenated bottle cap for food use. The difference between this embodiment and Embodiment 1 is that the composite film is a polytetrafluoroethylene film, while the rest of the test steps are the same as in Embodiment 1.

[0107] The polytetrafluoroethylene (PTFE) membrane is made by mixing PTFE particles, followed by a blending and extrusion process to obtain a composite material, which is then granulated to obtain composite material particles. The composite material particles are then blown film extrusion, stretched, and shaped to obtain a breathable membrane. The process parameters are the same as those in step 4) of Preparation Example 1.

[0108] Polytetrafluoroethylene (PTFE) has a molecular weight of 100,000 and a density of 2.1 g / cm³. 3 .

[0109] Comparative Example 2

[0110] A deoxygenated bottle cap for food use. The difference between this embodiment and Embodiment 1 is that the composite film is a PET film and a PKF film, while the rest of the test steps are the same as in Embodiment 1.

[0111] Comparative Example 3

[0112] A deoxygenated bottle cap for food use. The difference between this embodiment and Embodiment 1 is that the composite film is a PET film and a PET film. The rest of the test steps are the same as in Embodiment 1.

[0113] Performance testing was conducted on the deoxygenated food bottle caps prepared in Examples 1-12 and Comparative Examples 1-3, including air permeability tests, anti-clogging tests, and leak prevention tests.

[0114] Test Method / Experimental Method: Air Permeability Test: Seventeen bottles were selected, and oyster sauce was filled into each bottle to 4 / 5 of its volume. Each bottle was then capped with a food-grade oxygen absorber cap prepared in Examples 1-11 and Comparative Examples 1-3. The remaining bottle, labeled with a cap without the food-grade oxygen absorber cap, was designated Comparative Example 4. The bottles containing oyster sauce were placed in an insulated box at 40°C. Every 2 hours, the top pressure was opened to allow air to fill the bottles, and then the top pressure was closed. The spoilage time of the oyster sauce was recorded. If the oyster sauce spoiled quickly, it indicated poor air permeability of the PET film; if the oyster sauce was preserved for a longer period, it indicated good air permeability of the PET film, facilitating the oxygen absorber's consumption of oxygen.

[0115] Anti-clogging test: Sixteen bottles were selected, and oyster sauce was filled into each bottle to 4 / 5 of its volume. The bottles were then capped with the food-grade deoxidizing caps prepared in Examples 1-11 and Comparative Examples 1-3, respectively (Group A). ​​Sixteen bottles were selected, and soy sauce was filled into each bottle to 4 / 5 of its volume. The bottles were then capped with the food-grade deoxidizing caps prepared in Examples 1-11 and Comparative Examples 1-3, respectively (Group B). Sixteen bottles were selected, and vinegar was filled into each bottle to 4 / 5 of its volume. 5. Cover the bottles with the oxygen absorber caps prepared in Examples 1-11 and Comparative Examples 1-3, respectively, designated as Group C. Prepare another empty bottle, remove the air, and cover it with the cap, designated as Group D. Invert the bottles from Groups A, B, C, and D 1000 times to ensure the oyster sauce, soy sauce, and vinegar inside are fully in contact with the PET film. Then separate the caps from the bottles and place the caps in the air. After 5 days, check the effectiveness of the oxygen absorber. If effective, the PET film is blocked; if ineffective, the PET film is not blocked. Leakage prevention test: Take the oxygen absorber caps prepared in Examples 1-12 and Comparative Examples 1-3, remove the oxygen absorber assembly, and fold the assembly repeatedly 2000 times, observing whether the oxygen absorber leaks out.

[0116] The experimental data are shown in Table 3:

[0117] Table 3 Performance test data

[0118]

[0119] As can be seen from Examples 1-12 and Comparative Examples 1-4 and in conjunction with Table 3, the deoxygenated bottle cap for food prepared in this application can effectively slow down the deterioration time of liquid seasonings after opening. Furthermore, the composite film prepared in this application has the effects of being breathable, waterproof, oil-proof, and preventing the adhesion of substances, which can effectively prevent liquid seasonings from contacting and clogging the composite film.

[0120] Compared with Comparative Example 1, the oyster sauce in Example 1 deteriorated for 30 days and no clogging occurred in the anti-clogging test, while the oyster sauce in Comparative Example 1 deteriorated for 18 days and clogging occurred in the anti-clogging test. This shows that the composite membrane prepared by this application has high air permeability, good oil and water resistance, and is not easy to adhere to substances and clog. It is beneficial for food deoxygenated bottle caps to slow down the deterioration time of liquid seasonings after opening.

[0121] Compared with Comparative Examples 2-3, Example 1 shows that deoxidizer leakage occurred in Comparative Examples 2-3, indicating that the composite membrane prepared in this application has good strength and can effectively prevent deoxidizer leakage.

[0122] Compared with Examples 6 and 8, in Example 1, the oyster sauce deteriorated for 30 days and no clogging occurred in the anti-clogging test. In Example 6, the oyster sauce deteriorated for 18 days and the bottles containing oyster sauce and soy sauce became clogged in the anti-clogging test. In Example 8, the oyster sauce deteriorated for 21 days and the bottles containing oyster sauce, soy sauce, and vinegar became clogged in the anti-clogging test. This demonstrates that the esterified chitosan prepared in this application, when used to prepare PET films, can effectively improve the air permeability, waterproof and oil-proof properties, and anti-adhesion properties of composite films.

[0123] Comparing Example 1 and Example 7, the oyster sauce in Example 1 spoiled for 30 days and no clogging occurred in the anti-clogging test, while the oyster sauce in Example 7 spoiled for 11 days and the bottle containing the oyster sauce became clogged in the anti-clogging test. This shows that by using polyethylene to prepare PET film, the air permeability, waterproof and oil-proof performance and the ability to prevent the adhesion of sticky substances of the composite film can be effectively improved.

[0124] Compared with Example 9, in Example 1, the oyster sauce deteriorated for 30 days and no clogging occurred in the anti-clogging test. In Example 7, the oyster sauce deteriorated for 11 days and the bottle containing the oyster sauce became clogged in the anti-clogging test. This shows that the composite membrane prepared by the preparation process of this application has good air permeability, water and oil resistance and anti-adhesion properties.

[0125] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A food-grade deoxygenated bottle cap, characterized in that: The system includes a bottle cap body (1) and an oxygen absorber assembly (4), wherein the oxygen absorber assembly (4) is detachably connected to the bottle cap body (1); the bottle cap body (1) includes a cap body (11) and a pressing member (12) that fits onto the cap body; the inner wall of the cap body (11) is provided with a support plate (2) and a liquid outlet pipe (3), wherein the liquid outlet pipe (3) passes through the support plate (2); the oxygen absorber assembly (4) includes a fixing member (41), an oxygen absorber component (42), and a sealing member (43); the fixing member (41) is used to fix the oxygen absorber component (42), and the oxygen absorber component (42) is used to fix the oxygen absorber component (42). The deoxidizing component (42) is connected to the fixing member (41), and the side of the deoxidizing component (42) away from the fixing member (41) is connected to the sealing member (43). When the deoxidizing agent assembly (4) is installed inside the cover (11), the sealing member (43) abuts against the support plate (2), and the deoxidizing component (42) faces the support plate (2). The deoxidizing component (42) is composed of a packaging bag and a deoxidizing agent located inside the packaging bag. The packaging bag is made of a composite film, which includes PET film, PAP film, PTF film and PE film in sequence. The PET film is prepared by the following method: 1) First, dissolve chitosan in acetic acid, heat to 40-50℃, add acetic anhydride and stir to obtain a viscous liquid, then place the viscous liquid in ice water until no precipitate is produced, filter, remove the filter residue, dry, and obtain esterified chitosan. 2) PET, polyethylene, inorganic filler, surfactant and esterified chitosan are mixed and processed by blending extrusion to obtain composite material A, and then processed by granulation to obtain composite material particles A. 3) Polytetrafluoroethylene and silane coupling agent are mixed and processed by blending extrusion to obtain composite material B, which is then processed by granulation to obtain composite material particles B. 4) Composite material particles A and composite material particles B are mixed and processed by blending extrusion to obtain composite material C. Then, composite material particles C are processed by granulation. Composite material particles C are blown film extrusion, stretching and shaping to obtain PET film.

2. The deoxygenated bottle cap for food use according to claim 1, characterized in that: In step 4), the melt temperature during the melting stage of the blown film extrusion process is 350-370℃, and the shaping temperature is 130-150℃.

3. A food-grade deoxygenated bottle cap according to claim 1, characterized in that, The raw materials used to prepare the PET film are as follows by weight: 30-40 PET samples 20-30 parts of polytetrafluoroethylene 10-15 parts of polyethylene 5-10 parts of inorganic filler 6-10 parts of surfactant 4-8 parts chitosan 5-10 parts acetic acid 3-5 parts acetic anhydride 2-4 parts of silane coupling agent.

4. The deoxygenated bottle cap for food use according to claim 3, characterized in that: The polyethylene is obtained by mixing low-density polyethylene and high-density polyethylene in a weight ratio of 1:(1-3).

5. A food-grade deoxygenated bottle cap according to claim 4, characterized in that: The melt flow index of low-density polyethylene is 0.3-1.2 g / 10 min, and its density is 0.910-0.940 g / cm³. 3 The melt flow index of high-density polyethylene is 5-8 g / 10 min, and its density is 0.950-0.970 g / cm³. 3 .

6. A food-grade deoxygenated bottle cap according to claim 4, characterized in that: The surfactant is prepared by mixing a hydrophobic surfactant and an oleophobic surfactant in a weight ratio of 3:(1-3); The hydrophobic surfactant is at least one of polydimethylsiloxane, polyvinyl alcohol, or stearic acid. At least one of the oleophobic surfactants polysorbate or fatty alcohol oxyethylene ether.

7. A food-grade deoxygenated bottle cap according to claim 4, characterized in that: The inorganic filler is at least one of silicon dioxide, titanium dioxide, calcium carbonate, calcium oxide, talc, calcium hydroxide, or corundum powder.

8. A food-grade deoxygenated bottle cap according to claim 1, characterized in that: The PAP membrane has a pore density of 400-500 pores / cm³. 2 The pore density of the PTF membrane is 500-600 pores / cm³. 2 The PE film has a pore density of 500-600 pores / cm³. 2 .

9. A food-grade deoxygenated bottle cap according to claim 1, characterized in that: The thickness ratio of the PET film, the PAP film, the PTF film, and the PE film is 1:(1-2):(0.5-1):1.

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