CN116790123A - Food deoxidizer and preparation method thereof - Google Patents
Food deoxidizer and preparation method thereof Download PDFInfo
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- CN116790123A CN116790123A CN202310613165.5A CN202310613165A CN116790123A CN 116790123 A CN116790123 A CN 116790123A CN 202310613165 A CN202310613165 A CN 202310613165A CN 116790123 A CN116790123 A CN 116790123A
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- 229920002545 silicone oil Polymers 0.000 claims abstract description 42
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 33
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- 239000003795 chemical substances by application Substances 0.000 claims description 6
- ONIHPYYWNBVMID-UHFFFAOYSA-N diethyl benzene-1,4-dicarboxylate Chemical compound CCOC(=O)C1=CC=C(C(=O)OCC)C=C1 ONIHPYYWNBVMID-UHFFFAOYSA-N 0.000 claims description 6
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- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 claims description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
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- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
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- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 description 2
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Abstract
The application relates to the technical field of food deoxidizers, in particular to a food deoxidizer and a preparation method thereof, wherein the food deoxidizer comprises a deoxidizer bag and a display bag, the deoxidizer bag is connected with the display bag, a perspective window is arranged on the display bag, the deoxidizer bag and the display bag are prepared from packaging breathable waterproof films, and the packaging breathable waterproof films comprise the following components in parts by weight: the packaging breathable waterproof film is prepared from polyphenyl thioether, polytetrafluoroethylene, polyethylene glycol, polyester modified silicone oil, bentonite, tween, a cross-linking agent and an antibacterial agent, so that the packaging waterproof breathable film has good waterproof and oilproof properties, air permeability and powder leakage resistance, and the deoxidizer bag and the display bag are prepared from the packaging waterproof breathable film, so that the air permeability, the waterproof and oilproof properties and the powder leakage resistance of the deoxidizer bag and the display bag are improved.
Description
Technical Field
The application relates to the technical field of food deoxidizers, in particular to a food deoxidizer and a preparation method thereof.
Background
In most of the current food packaging processes, a deoxidizer is needed, and the deoxidizer can effectively remove oxygen in the food packaging so as to inhibit food deterioration. The deoxidizer is mainly prepared from a packaging bag and a deoxidizing material filled in the packaging material, wherein the packaging belt has good ventilation effect, oxygen is absorbed by the deoxidizing material through the packaging bag, and the packaging bag is mainly prepared from a packaging ventilation film.
The packaging breathable film usually comprises an outer film, a paper layer and an inner film layer, wherein the outer film and the inner film layer are generally airtight films, the paper layer is provided with pores and has certain breathability, in order to solve the problem that the film layer is airtight, the outer film and the inner film layer are perforated by laser equipment, and then the outer film and the inner film layer are respectively compounded with the paper layer, but the preparation method of the packaging film needs expensive laser perforation equipment, increases the manufacturing cost, is waterproof and oil-proof and is easy to leak powder, so that the use of the food deoxidizer is limited. In order to improve the waterproof performance of the packaging breathable film, the packaging breathable film is prepared by adopting the following modes: mixing the polymer matrix and the pore-forming agent, extruding a sheet, cooling, preheating, stretching, heat setting, cooling, trimming and coiling. The effect of the stretching process on the film properties is important throughout the production process, which results in the breathable film forming a microporous structure of a certain size and morphology. However, micropores generated by the stretching process are uneven and possibly generate larger micropores, and the stretching process involves adjustment of multiple parameters, so that the microporous breathable film produced by the traditional process has low yield, and the breathability, the waterproofness and the oil repellency are not guaranteed, so that the food deoxidizer is prepared.
Disclosure of Invention
The application provides a food deoxidizer and a preparation method thereof in order to simultaneously improve the ventilation, oil resistance, water resistance and powder leakage of the food deoxidizer.
In a first aspect, the present application provides a food deoxidizer, which adopts the following technical scheme:
the food deoxidizer comprises a deoxidizer bag and a display bag, wherein the deoxidizer bag is connected with the display bag, the display bag is provided with a perspective window, the deoxidizer bag and the display bag are prepared from packaging breathable waterproof films, and the packaging breathable waterproof films comprise the following components in parts by weight:
10-15 parts of polyphenylene sulfide
10-20 parts of polytetrafluoroethylene
Polyethylene 2-6 parts
Polyethylene glycol 2-6 parts
5-10 parts of polyester modified silicone oil
Bentonite 2-5 parts
Tween 1-2 parts
1-2 parts of cross-linking agent
1-2 parts of antibacterial agent.
By adopting the technical scheme, the prepared packaging breathable waterproof film has good air permeability, water resistance, oil resistance and antibacterial property, and the deoxidizer bag and the display bag prepared by the packaging breathable film have good powder leakage preventing performance, air permeability, water resistance, oil resistance and antibacterial property.
Wherein, the polyphenyl thioether and polytetrafluoroethylene are used together, so that the water resistance and oil resistance of the packaging breathable waterproof film can be effectively improved. The polyphenyl thioether has the characteristics of no toxicity, good processing formability, small hygroscopicity and the like, and can improve the waterproof performance and the oil-proof performance of the packaging breathable waterproof film when used for preparing the packaging breathable waterproof film. Polytetrafluoroethylene is used for producing a film, and the air permeability of the film can be improved. Although the waterproof and oil-proof performance of the packaging breathable waterproof film can be improved by using the polyphenyl thioether and polytetrafluoroethylene together to prepare the film, the air permeability of the polytetrafluoroethylene is affected, so that the air permeability of the packaging breathable waterproof film is poor, and the packaging breathable waterproof film is not suitable for preparing deoxidizer bags and display bags.
In the processing process of the packaging breathable waterproof film, polyethylene, tween and polyethylene glycol can improve the compatibility of polyphenyl thioether, polytetrafluoroethylene and polyester modified silicone oil, and improve the formability of the packaging breathable waterproof film, so that the film with stable structure and uniform air holes is obtained.
The air holes in the packaging breathable waterproof film can be increased through the effects of the polyester modified silicone oil and the bentonite, the size of the air holes can be controlled, the air holes are prevented from being too large or too small, the waterproof oil-proof property and the leak-proof powder property are reduced due to the too large air holes, and the air permeability is poor due to the too small air holes.
The cross-linking agent is used to increase the tensile strength of the packaging breathable film.
The antibacterial agent improves the antibacterial performance of the packaging breathable waterproof film, so that the deoxidizing agent bag and the display bag have good antibacterial performance.
Preferably, the polyester modified silicone oil is prepared by the following method:
(1) Mixing polyester polyol, polybutadiene diol, biphenyl dicarboxylic acid, diethyl terephthalate and a chain extender in a solvent to obtain a mixture;
(2) Reacting the mixture obtained in the step (1), aliphatic diisocyanate and a catalyst to obtain a prepolymer;
(3) And (3) reacting the prepolymer obtained in the step (2), hydroxyl silicone oil and a chain extender in a solvent to obtain the polyester modified silicone oil.
Preferably, the polyester modified silicone oil comprises the following materials in parts by weight:
2-4 parts of polyester polyol
Polybutadiene diol 20-30 parts
3-8 parts of biphenyl dicarboxylic acid
2-10 parts of diethyl terephthalate
1-3 parts of chain extender
Aliphatic diisocyanate 5-10 parts
1-2 parts of catalyst
3-10 parts of hydroxyl silicone oil
15-20 parts of a solvent.
Through adopting above-mentioned technical scheme, optimize the quantity of the material of preparation polyester modified silicone oil, the size and the degree of consistency that the preparation polyester modified silicone oil can further control the gas pocket and form, prevent the gas pocket of packing ventilative water-proof membrane size inequality and distribution to effectively improve waterproof oil-proof, gas permeability and leak protection powder nature of packing ventilated membrane.
Preferably, the polyester polyol is aliphatic polyester polyol and/or aromatic polyester polyol, wherein the functionality of the aliphatic polyester polyol is 1.5-3, the acid ester is 20-100mgKOH/g, and the molecular weight is 1000-8000; the functionality of the aromatic polyester polyol is 2-5, the acid ester is 80-200mgKOH/g, and the molecular weight is 2000-15000.
Preferably, the viscosity of the hydroxyl-terminated silicone oil is 10-20mm at 25 DEG C 2 And/s, the hydroxyl content is 4-8%.
Preferably, the aliphatic diisocyanate is at least one of hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4, 4' -diisocyanate, xylylene diisocyanate and tetramethyl-m-xylylene diisocyanate.
By adopting the technical scheme, the types and parameters of the polyester polyol, the performance parameters of the hydroxyl-terminated silicone oil and the types of the aliphatic diisocyanate are optimized, and the size and uniformity of the formation of the air holes of the polyester modified silicone oil are further improved.
Preferably, the weight ratio of the polyethylene to the low-density polyethylene to the high-density polyethylene is 5: (1-3) and mixing.
Through adopting above-mentioned technical scheme, optimize the constitution of polyethylene, further control the size and the degree of consistency of packing ventilative water proof membrane air vent, improve the gas permeability, reduce and improve the condition that pack ventilative water proof membrane is different in the air vent size that forms, further improve the waterproof oil-proof and leak protection powder nature of packing ventilative water proof membrane.
Preferably, the polyphenylene sulfide has an average molecular weight of 20000 to 45000 and a flexural modulus of 2.1 to 3.2Gpa.
By adopting the technical scheme, the molecular weight and the flexural modulus of the polyphenyl thioether are optimized, the tensile strength of the packaging breathable waterproof film is further improved, and meanwhile, the packaging breathable waterproof film is favorable for being fused with polytetrafluoroethylene and polyethylene, and the packaging breathable waterproof film is favorable for forming air holes with uniform size.
Preferably, the preparation method of the packaging breathable waterproof film comprises the following preparation steps:
s1, mixing polyphenyl thioether, polyethylene glycol, polyester modified silicone oil, tween and a cross-linking agent, extruding and granulating to obtain master batch A; s2, mixing polytetrafluoroethylene, polyethylene, bentonite and an antibacterial agent, extruding and granulating to obtain master batch B;
s3, mixing the master batch A with the master batch B, extruding and granulating to obtain a master batch C, and then carrying out film blowing extrusion, stretching and shaping treatment to obtain the packaging breathable waterproof film;
the melt temperature of the melting stage of the film blowing extrusion process is 350-370 ℃, and the shaping treatment temperature is 130-150 ℃;
the melt temperature of the melting stage of the film blowing extrusion process is 350-370 ℃, and the shaping treatment temperature is 130-150 ℃;
the longitudinal stretching ratio in the stretching step is (6-9): 1, a transverse stretching ratio of (1-3): 1.
the packaging breathable film prepared by the method has good air permeability, water resistance, oil resistance and powder leakage resistance, and the packaging breathable waterproof film is uniform in size and uniform in distribution in the forming process by optimizing the melting temperature, the shaping temperature and the stretching parameters of the blowing film, so that the packaging breathable waterproof film is guaranteed to have good air permeability and good water and oil resistance and powder leakage resistance.
In a second aspect, the application provides a preparation method of a food deoxidizer, which adopts the following technical scheme:
a preparation method of a food deoxidizer comprises the following preparation steps:
cutting the packaging breathable waterproof film according to the shapes of the deoxidizer bag and the display bag, sealing edges, respectively adding deoxidizer materials and indicator materials into the deoxidizer bag and the display bag, sealing and preserving under the condition of sealing and oxygen-free.
The food deoxidizer prepared by the method has good water and oil resistance, air permeability and powder leakage resistance, and meanwhile, whether oxygen in a food container is absorbed cleanly or not can be observed through a perspective window of the display bag, so that the food deoxidizer is convenient and practical.
In summary, the application has the following beneficial effects:
1. the packaging breathable waterproof film is prepared from polyphenyl thioether, polytetrafluoroethylene, polyethylene glycol, polyester modified silicone oil, bentonite, tween, a cross-linking agent and an antibacterial agent, so that the packaging waterproof breathable film has good waterproof oil-proof property, air permeability and powder leakage resistance, and the deoxidizer bag and the display bag are prepared from the packaging waterproof breathable film, thereby being beneficial to improving the air permeability, waterproof oil-proof property and powder leakage resistance of the deoxidizer bag and the display bag.
2. According to the application, polyester polyol, polybutadiene diol, biphenyl dicarboxylic acid, diethyl terephthalate, a chain extender, aliphatic diisocyanate, a catalyst, hydroxyl-terminated silicone oil and a solvent are used for preparing the polyester modified silicone oil, and the polyester modified silicone oil is used for preparing the packaging breathable waterproof film, so that the waterproof oil-proof property, the air permeability and the powder leakage resistance of the packaging breathable waterproof film can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of a deoxidizer for food in example 1.
Reference numerals: 1. a deoxidizer bag; 2. displaying the bag; 3. perspective window
Detailed Description
Examples
Example 1
Referring to fig. 1, the food deoxidizer comprises a deoxidizer bag 1 and a display bag 2, wherein the deoxidizer bag 1 and the display bag 2 are connected, the display bag 2 is provided with a perspective window 3, the deoxidizer bag 1 and the display bag 2 are prepared from packaging breathable waterproof films, the packaging breathable waterproof films are cut according to the shapes of the deoxidizer bag 1 and the display bag 2, edges are sealed, deoxidizer materials and indicator materials are respectively added into the deoxidizer bag 1 and the display bag 2, and the deoxidizer bag is sealed.
Wherein, the packaging breathable waterproof film is prepared by the following method:
s1, mixing 0.10Kg of polyphenyl thioether, 0.06Kg of polyethylene glycol, 0.08Kg of polyester modified silicone oil, 0.01Kg of Tween and 0.01Kg of cross-linking agent (dicumyl peroxide), extruding and granulating to obtain master batch A;
s2, mixing 0.10Kg of polytetrafluoroethylene, 0.02Kg of polyethylene, 0.1Kg of bentonite and 0.01Kg of antibacterial agent, extruding and granulating to obtain master batch B;
s3, mixing the master batch A with the master batch B, extruding and granulating to obtain a master batch C, and then carrying out film blowing extrusion, stretching and shaping treatment to obtain the packaging breathable waterproof film;
the melt temperature in the film blowing and melting stage is 350 ℃, and the shaping treatment temperature is 130 ℃;
the longitudinal stretching ratio in the stretching step was 6:1, a transverse stretching ratio of 1:1.
the polyester modified silicone oil is polyester modified polyorganosiloxane, and has viscosity of 500cps, specific gravity of 1.03 and refractive index of 1.450 at 25deg.C.
Examples 2-3 differ from example 1 in that the amounts, types and test parameters of the partial raw materials for packaging the breathable waterproof film differ from example 1, and the remaining experimental procedures are the same as in example 1. Examples 1-3 specific differences in amounts, types and experimental parameters of raw materials are shown in table 1:
TABLE 1 examples 1-3 amounts, types and test parameters of raw materials
The melt index of the low density polyethylene is 0.3g/10min, and the density is 0.910g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The melt index of the high-density polyethylene is 5g/10min, and the density is 0.950g/cm 3 。
Example 4
The difference between the food deoxidizer and the embodiment 1 is that the polyester modified silicone oil is prepared by the following method:
(1) 0.02Kg of polyester polyol, 0.02Kg of polybutadiene diol, 0.08Kg of biphenyl dicarboxylic acid, 0.10Kg of diethyl terephthalate and 0.015Kg of chain extender (5-amino-1, 3-trimethylcyclohexylmethylamine) are mixed in 0.1Kg of solvent (methanol) to obtain a mixture;
(2) Reacting the mixture obtained in the step (1), 0.1Kg of aliphatic diisocyanate (hexamethylene diisocyanate) and 0.02Kg of catalyst (stannous octoate) to obtain a prepolymer;
(3) The prepolymer obtained in the step (2), 0.1Kg of hydroxyl-terminated silicone oil and 0.015K (5-amino-1, 3-trimethylcyclohexylmethylamine) g of chain extender are reacted in 0.05Kg of solvent (methanol) to obtain polyester modified silicone oil.
Examples 5 to 6 differ from example 4 in the amounts, types and test parameters of the partial raw materials of the polyester-modified silicone oil, which differ from example 4, and the remaining experimental procedures were identical to example 4. Examples 4-6 specific differences in amounts, types and test parameters of polyester modified silicone oil materials are shown in table 2:
table 2 4-6 amount, type and test parameters of polyester modified Silicone oil Material
The aliphatic polyester polyol in examples 4 to 6 had a functionality of 1.5, an acid ester of 20mgKOH/g and a molecular weight of 1000; the aromatic polyester polyol had a functionality of 2, the acid ester 80mgKOH/g and a molecular weight of 2000.
Example 7
A food deoxidizer, which differs from example 6 in that the aliphatic polyester polyol has a functionality of 3, an acid value of 100mgKOH/g and a molecular weight of 8000; the aromatic polyester polyol had a functionality of 5, an acid value of 200mgKOH/g and a molecular weight of 15000.
Example 8
A food deoxidizer is different from example 6 in that hydroxyl-terminated silicone oil has a viscosity of 8mm at 25deg.C 2 The hydroxyl content was 2%, and the rest of the experimental materials, amounts, parameters and experimental procedures were the same as in example 6.
Example 9
The food deoxidizer of example 6 is different in that the polyethylene is composed of low density polyethylene and high density polyethylene in a weight ratio of 5:1, and the rest of experimental raw materials, dosage, parameters and experimental steps are the same as in example 6.
Example 10
The food deoxidizer differs from example 6 in that the polyethylene is composed of low density polyethylene and high density polyethylene in a weight ratio of 1:5, and the rest of experimental raw materials, the dosage, parameters and experimental steps are the same as those of the example 6.
Example 11
A food deoxidizer, example 7, is different in that the aliphatic polyester polyol has a functionality of 4, an acid value of 120mgKOH/g, and a molecular weight of 9000; the aromatic polyester polyol had a functionality of 1, an acid value of 60mgKOH/g and a molecular weight of 1500.
Comparative example
Comparative example 1
A food deoxidizer is different from example 1 in that polyphenylene ether is used instead of equivalent polyphenylene sulfide, and the rest of experimental raw materials, amounts, parameters and experimental procedures are the same as those of example 1.
The molecular weight of the polyphenylene ether was 50000 and the melting point was 257 ℃.
Comparative example 2
A food deoxidizer is different from example 1 in that polypropylene is used instead of the same amount of polyethylene, and the rest of experimental raw materials, amounts, parameters and experimental procedures are the same as in example 1.
The weight average molecular weight of the polypropylene was 5000.
Comparative example 3
A food deoxidizer was different from example 1 in that polycarbonate was used instead of the same amount of polytetrafluoroethylene, and the rest of experimental raw materials, amounts, parameters and experimental procedures were the same as in example 1.
Comparative example 4
The comparative example was different from example 1 in that simethicone was used instead of the equivalent amount of polyester-modified silicone oil, and the rest of experimental raw materials, amounts, parameters and experimental procedures were the same as example 1.
At 25 ℃, the viscosity is 100mm 2 /s。
Comparative example 5
The comparative example was different from example 1 in that sodium bicarbonate was used instead of the equivalent amount of bentonite, and the rest of experimental raw materials, amounts, parameters and experimental procedures were the same as in example 1.
Comparative example 6
A food deoxidizer is different from example 1 in that simethicone is used instead of equivalent polyester modified silicone oil and bentonite, and the rest of experimental raw materials, dosage, parameters and experimental steps are the same as those of example 1, comparative example 7
The food deoxidizer is different from the food deoxidizer in example 1 in that the experimental steps are as follows: and extruding and granulating polyphenyl thioether, polytetrafluoroethylene, polyethylene glycol, polyester modified silicone oil, tween, a cross-linking agent, polytetrafluoroethylene, polyethylene, bentonite and an antibacterial agent to obtain master batch C, and then performing film blowing extrusion, stretching and shaping treatment to obtain the packaging breathable waterproof film.
Performance test
The food deoxidizers prepared in examples 1 to 11 and comparative examples 1 to 6 were each 10.+ -. 0.05g in weight, and were subjected to an oil repellency test, a water repellency test, an air permeability test, and a powder leakage prevention test.
Detection method/test method
Oil repellency test the food deoxidizers prepared in examples 1-11 and comparative examples 1-7 were weighed, then soaked in rapeseed oil at 60 c for 10min, taken out, wiped off the surface oil, weighed, and the weight difference calculated.
Waterproof test: the deoxidizers for foods prepared in examples 1 to 11 and comparative examples 1 to 7 were weighed, immersed in an aqueous solution containing 20% isopropyl alcohol for 10 minutes, wiped off the surface water stains, weighed, and calculated as the weight difference.
Air permeability test: the food deoxidizers prepared in comparative examples 1 to 11 were placed in a gas barrier bag made of a nylon/polyethylene laminated film, filled with 500ml of a mixed gas (95% oxygen and 5% air) having a humidity of 50%, sealed, and the time to develop the color of the red pigment under anaerobic conditions was counted. The deoxidizer bag is filled with an iron deoxidizing material. The display bag is filled with oxygen indicator, which comprises methylene blue, red pigment, sugar, water and silicon dioxide. The methylene blue in the original ingredients is reduced by reducing sugar to form reduced methylene white, the color of red pigment is displayed under the anaerobic condition, when the deoxidizer can not remove oxygen in the food bag any more, the reduced methylene white is oxidized by the oxygen again to generate oxidized blue methylene blue, thereby being blue, therefore, the usability of the deoxidizer can be judged through the color change of the oxygen indicator, and the powder leakage prevention test is carried out: and cutting off a package of samples, sealing edges, pouring out raw materials, putting the package material on a table top, laying two layers of facial tissues below the package material, dripping 0.1ml of red ink to about half of the ventilation area of a unit piece of small piece of the package material by using a buret for coloring liquid red ink, standing for 5min, and checking whether the facial tissues laid below the product have the absorption of the coloring liquid red ink or not, and if the facial tissues do not absorb the red ink, the product is qualified.
The test data are shown in table 3:
TABLE 3 Performance test data
As is apparent from examples 1 to 11 and comparative examples 1 to 7 in combination with Table 3, by preparing a food deoxidizer using the formulation and method of the present application, the water and oil repellency, air permeability, and powder leakage prevention of the food deoxidizer can be effectively improved.
Example 1 the weight increase in the oil and water repellency tests of example 1 compared to comparative examples 1-3 is significantly less than the weight increase in the oil and water repellency tests of comparative examples 1-3, demonstrating that the oil and water repellency properties of the food deoxidizer can be effectively improved by the formulation of the present application; the time for the air permeation test in example 1 was significantly shorter than that of comparative examples 1-3, demonstrating that the air permeation of the food deoxidizer can be effectively improved by the formulation of the present application; the powder leakage phenomenon does not occur in example 1, and the powder leakage phenomenon occurs in comparative examples 2 to 3, which shows that the powder leakage prevention performance of the food deoxidizer can be effectively improved through the formula of the application.
Example 1 the weight increase in the oil and water repellency tests of example 1 compared to comparative examples 4-6 is significantly less than the weight increase in the oil and water repellency tests of comparative examples 4-6, demonstrating that the oil and water repellency properties of the food deoxidizer can be effectively improved by the formulation of the present application; the time for the air permeation test in example 1 was significantly shorter than that of comparative examples 4-6, demonstrating that the air permeation of the food deoxidizer can be effectively improved by the formulation of the present application; the powder leakage phenomenon does not occur in example 1, and the powder leakage phenomenon occurs in comparative examples 4 to 6, which shows that the powder leakage prevention performance of the food deoxidizer can be effectively improved through the polyester modified silicone oil and the bentonite.
The weight increase in the oil and water repellency tests in example 1 was significantly smaller than that in the oil and water repellency tests in comparative example 7, the air permeation test time in example 1 was significantly shorter than that in comparative example 7, no powder leakage occurred in example 1, and the powder leakage occurred in comparative example 7, indicating that the oil, water, air permeability, and powder leakage prevention properties of the food deoxidizer could be effectively improved by using the preparation method of the present application.
The weight increase in the oil-repellent test and the water-repellent test in example 4 was significantly smaller than that in example 1, and the air permeation test in example 4 was significantly shorter than that in example 1, compared with example 1 and example 4, indicating that the oil-repellent performance, the water-repellent performance and the air permeation of the food deoxidizer were improved by using the polyester-modified silicone oil prepared in the present application.
Example 6 the weight increase in the oil and water repellency test in example 6 compared to example 8 was significantly less than the weight increase in the oil and water repellency test in example 8, and the air permeation test time in example 6 was significantly shorter than the air permeation test time in example 8, indicating that the oil repellency, water repellency, and air permeability of the food deoxidizer could be advantageously improved by optimizing the parameters of the hydroxyl-terminated silicone oil.
Example 6 the weight increase in the oil and water repellency test in example 6 compared to example 10 was significantly less than the weight increase in the oil and water repellency test in example 10, and the air permeation test time in example 6 was significantly shorter than the air permeation test time in example 10, indicating that the oil repellency, water repellency, and air permeability of the food deoxidizer could be advantageously improved by optimizing the amount of the privacy polyethylene to the high density polyethylene.
The weight increase in the oil and water repellency tests in example 7 was significantly less than that in example 11, and the air permeation test time in example 7 was significantly shorter than that in example 11, compared with example 7 and example 11, indicating that the oil repellency, water repellency, and air permeability of the food deoxidizer could be advantageously improved by the amounts of aliphatic and aromatic polyester polyols used.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. A food deoxidizer, characterized in that: including deoxidizing agent bag (1) and demonstration bag (2), deoxidizing agent bag (1) with show bag (2) are connected, show bag (2) are provided with perspective window (3), deoxidizing agent bag (1) with show bag (2) all are by the preparation of packing ventilative waterproof membrane, packing ventilative waterproof membrane includes that the component preparation of following parts by weight obtains:
10-15 parts of polyphenyl thioether
10-20 parts of polytetrafluoroethylene
Polyethylene 2-6 parts
Polyethylene glycol 2-6 parts
5-10 parts of polyester modified silicone oil
Bentonite 2-5 parts
Tween 1-2 parts
1-2 parts of cross-linking agent
1-2 parts of antibacterial agent.
2. The food deoxidizer according to claim 1, wherein the polyester modified silicone oil is prepared by the following method:
(1) Mixing polyester polyol, polybutadiene diol, biphenyl dicarboxylic acid, diethyl terephthalate and a chain extender in a solvent to obtain a mixture;
(2) Reacting the mixture obtained in the step (1), aliphatic diisocyanate and a catalyst to obtain a prepolymer;
(3) And (3) reacting the prepolymer obtained in the step (2), hydroxyl silicone oil and a chain extender in a solvent to obtain the polyester modified silicone oil.
3. The food deoxidizer according to claim 2, wherein the polyester modified silicone oil comprises the following materials in parts by weight:
2-4 parts of polyester polyol
Polybutadiene diol 20-30 parts
3-8 parts of biphenyl dicarboxylic acid
2-10 parts of diethyl terephthalate
1-3 parts of chain extender
Aliphatic diisocyanate 5-10 parts
1-2 parts of catalyst
3-10 parts of hydroxyl-terminated silicone oil
15-20 parts of a solvent.
4. A food deoxidizer according to claim 3, wherein: the polyester polyol is aliphatic polyester polyol and/or aromatic polyester polyol, wherein the functionality of the aliphatic polyester polyol is 1.5-3, the acid ester is 20-100mgKOH/g, and the molecular weight is 1000-8000; the functionality of the aromatic polyester polyol is 2-5, the acid ester is 80-200mgKOH/g, and the molecular weight is 2000-15000.
5. A food deoxidizer according to claim 4, wherein: the hydroxyl-terminated silicone oil has the viscosity of 10-20mm < 2 >/s and the hydroxyl content of 4-8% at 25 ℃.
6. A food deoxidizer according to claim 5, wherein: the aliphatic diisocyanate is at least one of hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4, 4' -diisocyanate, xylylene diisocyanate and tetramethyl isophthalene diisocyanate.
7. A food deoxidizer according to claim 1, wherein: the weight ratio of the polyethylene to the low density polyethylene to the high density polyethylene is 5: (1-3) and mixing.
8. A food deoxidizer according to claim 1, wherein: the average molecular weight of the polyphenyl thioether is 20000-45000, and the flexural modulus is 2.1-3.2Gpa.
9. The food deoxidizing agent according to claim 1, wherein the method for producing the packaging breathable waterproof film comprises the steps of:
s1, mixing polyphenyl thioether, polyethylene glycol, polyester modified silicone oil, tween and a cross-linking agent, extruding and granulating to obtain master batch A;
s2, mixing polytetrafluoroethylene, polyethylene, bentonite and an antibacterial agent, extruding and granulating to obtain master batch B;
s3, mixing the master batch A with the master batch B, extruding and granulating to obtain a master batch C, and then carrying out film blowing extrusion, stretching and shaping treatment to obtain the packaging breathable waterproof film;
the melt temperature of the melting stage of the film blowing extrusion process is 350-370 ℃, and the shaping treatment temperature is 130-150 ℃;
the longitudinal stretching ratio in the stretching step is (6-9): 1, a transverse stretching ratio of (1-3): 1.
10. a method for preparing a food deoxidizer for heating according to any one of claims 1 to 9, comprising the steps of:
cutting the packaging breathable waterproof film according to the shapes of the deoxidizer bag and the display bag, sealing edges, respectively adding deoxidizer materials and indicator materials into the deoxidizer bag and the display bag, sealing and preserving under the condition of sealing and oxygen-free.
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