CN114410044A - Water-soluble vacuum packaging preservative film and using method thereof - Google Patents
Water-soluble vacuum packaging preservative film and using method thereof Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/02—Polyalkylene oxides
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/04—Starch derivatives
- C08J2403/10—Oxidised starch
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- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2489/00—Characterised by the use of proteins; Derivatives thereof
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
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- C08K5/092—Polycarboxylic acids
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
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Abstract
The invention provides a water-soluble vacuum packaging preservative film which is composed of a polyacrylic acid layer preservative film and a polyethylene oxide layer outer coating film. When in use, the inner layer poly (internal olefine acid) preservative film and the outer layer polyethylene oxide coating film are coated on food to be preserved, soaked in water to swell, taken out, and naturally dried to obtain the food in vacuum package. The vacuum packaging preservative film can be widely applied to daily life of each family, and is suitable for preserving food, vegetables and fruits. The fresh-keeping packaging method is suitable for food retail industry and open-air retail industry to keep the meat cooked food fresh. The waste after the water-soluble vacuum preservative film is used can be dissolved in weak base with the temperature of more than 65 ℃ within 10 hours and can be degraded in the natural environment within 28 days, so that the 'white pollution' of food wrappage is solved.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, particularly relates to a water-soluble vacuum packaging preservative film and a using method thereof, and particularly relates to a preservative film capable of naturally forming vacuum packaging after being dissolved in water.
Background
In the process of selling or storing the existing food, such as cooked food of fruits, vegetables, meat, fish and the like, in order to prevent rottenness and mildew, a method of spraying a liquid preservative is mostly adopted, the food is sprayed on the fruits and the vegetables, and the cooked meat food is mostly vacuumized to realize the shelf life. However, in the retail of the early market or most farmer markets or various middle and small supermarkets, most meat foods are not externally packaged, basically are sold in a 'naked' mode or packaged in simple plastic bags, and many farmer open markets are not only externally packaged but also have no refrigeration storage facilities, so that the meat foods are easy to mildew in high-temperature weather, and cooked meat cannot be sprayed with liquid preservatives.
The liquid antistaling agent can not play a role in blocking air, can only keep fruits and vegetables from drying and shrinking for a short time, and can not be applied to packaging cooked meat products. As individual merchants cannot realize vacuum packaging due to no vacuum equipment, the food preservation safety cannot be obtained, and the food sanitation requirement cannot be met.
Disclosure of Invention
The invention aims to provide a water-soluble vacuum packaging preservative film and a using method thereof, and aims to solve the problem of vacuum packaging and preservation of the existing food.
The invention is realized by the following technical scheme: the water-soluble vacuum packaging preservative film is characterized in that: the plastic wrap include nexine plastic wrap and outer covering film, wherein:
the inner layer preservative film comprises the following components in percentage by mass: 45% -60% of polyacrylic acid aqueous solution; 0.5 to 1 percent of acetyl monoglyceride; sorbic acid 0.2-0.5%; 0.5 to 1.5 percent of triethyl tin chloride; muramidase 2% -3%; sucrose polyester 0.5% -1.5%; 1.3-BDO dibenzoate 1% -2%; 1% -4% of acetyl tributyl citrate; 3% -10% of gelatin aqueous solution; 2% -5% of oxalic acid; 8% -20% of oxidized starch aqueous solution; 1% -3.5% of polyethylene glycol; vitamin C or vitamin E2% -4%; the balance of solvent;
the outer coating film comprises the following components in percentage by mass: 75% -85% of polyoxyethylene aqueous solution; 5% -20% of polyethylene glycol aqueous solution; 1.3-BDO dibenzoate 1% -4%; sucrose polyester 0.5% -2.5%; solvent: the balance;
the solvent is prepared from the following components in percentage by mass of 95: 5 water and ethanol.
Further: the inner layer preservative film comprises the following components in percentage by mass: 53% -54% of polyacrylic acid aqueous solution; 0.7 to 0.8 percent of acetyl monoglyceride; sorbic acid 0.35-0.4%; 1% -1.2% of triethyl tin chloride; muramidase 2.5-2.6%; 1% -1.2% of sucrose polyester; 1.5 to 1.6 percent of 1.3-BDO dibenzoate; 2% -3% of acetyl tributyl citrate; 5% -8% of gelatin aqueous solution; 3.5 to 4 percent of oxalic acid; 12% -18% of oxidized starch aqueous solution; 2.5% -2.8% of polyethylene glycol; vitamin C or vitamin E3% -3.5%; the balance of solvent;
the outer coating film comprises the following components in percentage by mass: 80% -82% of polyoxyethylene aqueous solution; 12% -16% of polyethylene glycol aqueous solution; 2.5% -3% of 1.3-BDO dibenzoate; 1.3% -1.8% of sucrose polyester; the balance of solvent; the solvent is prepared from the following components in percentage by mass of 95: 5 water and ethanol.
Further: in the inner preservative film component: the solid content of the polyacrylic acid aqueous solution is 10-20%; molecular weight is 3000-5000; the solid content of the gelatin water solution is 10-20%; the solid content of the oxidized starch aqueous solution is 10-20 percent; the molecular weight of polyethylene glycol is 15000-20000. The outer coating film component comprises: the solid content of the polyoxyethylene aqueous solution is 20-35%, and the molecular weight of the polyoxyethylene is 20000-100000; the solid content of the polyethylene glycol aqueous solution is 10-20 percent, and the molecular weight is 10000-13000.
Further: the thickness of the inner preservative film is 30-60 um; the thickness of the outer layer coating film is 20um-40 um.
The invention also discloses a using method of the water-soluble vacuum packaging preservative film, which comprises the following steps:
(1) the inner preservative film and the outer coating film are overlapped and then coated outside the food to be preserved, and the inner preservative film is ensured to be tightly attached to the food without gaps;
(2) and (3) immersing the food wrapped with the preservative film into normal-temperature water for 10-15 seconds, and taking out the food to be naturally dried in a hanging mode when the inner layer and the outer layer of the preservative film absorb water, swell and are dissolved into a whole, so as to obtain the vacuum-packaged preservative food.
Further: if the dried preservative film is damaged or contains gas, the preservative film and the outer-layer coating film can be subsidized, or a part containing gas is perforated and deflated, then a piece of preservative film and an outer-layer coating film are subsidized, and the subsidized part is wetted by water and swelled and then dried again.
Further: after the preservation effect is finished, namely the preserved food is taken, the preservative film is torn off, and the surface of the food is washed clean by water for eating.
Further: and (3) soaking the torn waste preservative film in weak alkali hot water at the temperature of over 65 ℃ for 10h, or soaking the preservative film in normal-temperature alkali water for 72h and then hydrolyzing, thus realizing harmless treatment.
The invention has the advantages that: the inner layer preservative film of the water-soluble vacuum packaging preservative film adopts polyacrylic resin as a main film forming agent and can be in direct contact with food, the outer layer coating film adopts polyoxyethylene resin as a main film forming agent and can also be in direct contact with food, the requirements of food sanitation standards are met, polyacrylic acid and polyoxyethylene in water-soluble substances of the product are harmless to water and soil, and the water-soluble vacuum packaging preservative film has a complexing effect on the soil and has a plant growth promoting effect.
The water-soluble vacuum packaging preservative film is suitable for preserving food at normal temperature and refrigerating at low temperature for preservation in each family, and is also suitable for various cooked meat foods, intestines, fishes, vegetables and fruits to be used in normal-temperature sales places and various market places.
When the water-soluble vacuum packaging preservative film is applied, all functions can be realized only by using water without any vacuum equipment. The preservative film can be used for preserving and packaging food in any place and environment, and is very convenient to use. The water-soluble vacuum packaging preservative film effectively solves the problem of 'vacuum packaging' preservation of cooked meat, vegetables and fruits by individual merchants and families, and also solves the problems of garbage pollution of the waste of the existing vacuum packaging film and 'white pollution' to the environment. The product is non-toxic, tasteless, has no harmful gas release, and is an environment-friendly product.
Detailed description of the preferred embodiments
The invention provides a water-soluble vacuum packaging preservative film, which is formed by superposing an inner layer preservative film and an outer layer coating film:
the inner layer preservative film comprises the following components in parts by mass: the inner layer preservative film comprises the following components in percentage by mass: 45% -60% of polyacrylic acid aqueous solution; 0.5 to 1 percent of acetyl monoglyceride; sorbic acid 0.2-0.5%; 0.5 to 1.5 percent of triethyl tin chloride; muramidase 2% -3%; sucrose polyester 0.5% -1.5%; 1.3-BDO dibenzoate 1% -2%; 1% -4% of acetyl tributyl citrate; 3% -10% of gelatin aqueous solution; 2% -5% of oxalic acid; 8% -20% of oxidized starch aqueous solution; 1% -3.5% of polyethylene glycol; vitamin C or vitamin E2% -4%; the balance of solvent;
the outer coating film comprises the following components in percentage by mass: 75% -85% of polyoxyethylene aqueous solution; 5% -20% of polyethylene glycol aqueous solution; 1.3-BDO dibenzoate 1% -4%; sucrose polyester 0.5% -2.5%; solvent: the balance;
the solvent is prepared from the following components in percentage by mass of 95: 5 water and ethanol.
In the invention, the solid content of the polyacrylic acid aqueous solution in the inner preservative film component is 10-20%, and the molecular weight is 3000-5000-. The solid content of the gelatin solution is 10-20%; the solid content of the oxidized starch aqueous solution is 10-20 percent; the solid content of polyoxyethylene aqueous solution in the outer layer coating film component is 20-35%, and the molecular weight is 20000-100000; the solid content of the polyethylene glycol aqueous solution in the outer coating film component is 10-20%; the molecular weight is 10000-.
The present scheme is explained in detail below by means of a preparation method.
The preservative film is formed by superposing an inner layer preservative film and an outer layer coating film. Wherein: the thickness of the inner layer film is 30-60 um; the thickness of the outer coating film is 20um-40 um.
Preparation of inner layer preservative film
The inner preservative film component comprises 45-60% of polyacrylic acid aqueous solution, preferably 50-58%, more preferably 53-54%, and molecular weight of 3000-. In the present example, an aqueous solution of polyacrylic acid, preferably manufactured by United states carbonization, model number PE0176.170, was prepared using a preparation process well known to those skilled in the art. (Shanghai Lisheng chemical industry Co., Ltd. can be selected).
In the invention, the inner preservative film component comprises 0.5-1% of acetyl monoglyceride, preferably 0.6-0.9%, and more preferably 0.7-0.8%.
In the invention, the inner preservative film component comprises 0.2-0.5% of sorbic acid, preferably 0.3-0.45%, and more preferably 0.35-0.4%.
In the invention, the inner preservative film component comprises 0.5-1.5% of triethyl tin chloride, preferably 0.8-1.3%, and more preferably 1-1.2%.
In the invention, the inner preservative film component comprises 2-3% of muramidase, preferably 2.2-2.8%, and more preferably 2.5-2.6%.
In the present invention, the inner preservative film component comprises 0.5% to 1.5% sucrose polyester, preferably 0.8% to 1.3%, more preferably 1% to 1.2%.
In the invention, the inner preservative film component comprises 1 to 2 percent of 1.3-BDO dibenzoate, preferably 1.2 to 1.8 percent, and more preferably 1.5 to 1.6 percent.
In the invention, the inner preservative film component comprises 1-4% of acetyl tributyl citrate, preferably 1.5-3.5%, and more preferably 2-3%.
In the invention, the inner preservative film component comprises 3-10% of gelatin aqueous solution, preferably 4-9%, more preferably 5-8%, and the gelatin aqueous solution is edible gelatin.
In the invention, the inner preservative film component comprises 2-5% of oxalic acid, preferably 3-4.5%, and more preferably 3.5-4%.
In the invention, the inner preservative film component comprises 8-20% of oxidized starch aqueous solution, preferably 10-19%, and more preferably 12-18%.
In the invention, the inner preservative film component comprises 1-3.5% of polyethylene glycol, preferably 2-3%, and more preferably 2.5-2.8%.
In the invention, the inner preservative film component comprises 2-4% of vitamin C (or vitamin E), preferably 2.5-3.8%, and more preferably 3-3.5%.
In the invention, the inner preservative film component comprises a proper amount of solvent: water: ethanol 95: 5. the water is deionized water or distilled water, and the ethanol is industrial ethanol.
In the invention, the solid content of the polyacrylic acid aqueous solution in the inner preservative film component is 10-20%, preferably 12-18%, and more preferably 15-16%.
The solid content of the gelatin water solution is 10-20%, preferably 12-18%, and more preferably 15-16%.
The solid content of the oxidized starch aqueous solution is 10-20%, preferably 12-18%, and more preferably 15-16%.
In the invention, the inner preservative film is prepared by adopting a film casting coating process, the preparation method of the coating liquid adopts the method in the prior art, the preparation process is the same as that of the prior art, and the solid content of the coating liquid is 40-50%, preferably 42-48%, and more preferably 45-46%.
In the invention, the coated preservative film needs to be rewound and dried, the drying temperature is 40-45 ℃, and the drying linear speed is 20-25 m/min. After drying, standing for 4h at the normal temperature of 28 ℃ and the humidity of 30%, and packaging, wherein the inner layer is tinfoil, the outer layer is waxed kraft paper, and the outermost layer is hermetically packaged by PP.
Preparation of outer coating film
In the invention, the outer coating film component comprises 75-85% of polyoxyethylene aqueous solution, preferably 78-83%, more preferably 80-82%, solid content of 20-35%, preferably 25-32%, more preferably 28-30%, molecular weight of 20000-100000, preferably 50000.
In the invention, the outer coating component comprises 5-20% of polyethylene glycol aqueous solution, preferably 10-18%, more preferably 12-16%, molecular weight is 10000-13000, more preferably 11000-12000, and solid content is 10-20%, preferably 12-18%, more preferably 15-16%.
In the invention, the outer coating component comprises 1% -4% of 1.3-BDO dibenzoate, preferably 2% -3.5%, and more preferably 2.5% -3%.
In the present invention, the outer coating composition comprises from 0.5% to 2.5% sucrose polyester, preferably from 1% to 2%, more preferably from 1.3% to 1.8%.
In the invention, the outer coating component comprises proper amounts of solutions: water + ethanol 95: 5, the water is deionized water, and the ethanol is industrial ethanol.
In the present invention, polyethylene oxide is preferably purchased from United states Union carbide company, model number PEO176.170, PEO176.180, PEO175.390 and PEO175.300(xxxiii), or food grade polyethylene oxide from Shanghai Lisheng chemical Limited, made in China.
In the invention, the preparation method of the outer coating film is the same as that of the inner preservative film. Wherein, the solid content of the coating liquid is 40-50%, preferably 42-48%, and more preferably 45-46%.
In the invention, the outer coating film prepared by coating is rewound and dried, the drying temperature is 40-45 ℃, and the drying linear speed is 20-25 m/min. Standing at normal temperature for 2h after drying, packaging, using waxed kraft paper for the inner layer, and sealing and packaging the outer layer by using a PP plastic film.
The application method of the packaging preservative film comprises the following steps:
(1) after the inner preservative film and the outer coating film are overlapped, the preservative film is the inner layer, the coating film is the outer layer and is coated on food needing preservation, the inner preservative film is attached to the surface of the food as much as possible, the food is tightly coated, air is removed, two ends of the film are fastened by a thread rope, and a hanging rope fastener is tied;
(2) immersing the wrapped food in normal temperature water for about 10-15S, taking out the wrapped food when the two films absorb water and are dissolved into a whole, and naturally drying the wrapped food in a hanging manner to obtain vacuum-packaged fresh-keeping food;
(3) if the preservative film is dried to form a film and is not wrapped tightly or is provided with air (bubbles) inside, local perforation and air release can be carried out, then local film patching is carried out, or the part which is not wrapped tightly is patched with the film, then local water spraying is carried out for swelling, and then the film is dried, thus obtaining complete food in vacuum package;
(4) when the preserved food is used, the preservative film is removed, and the surface of the preserved food is cleaned by water for eating.
The treatment after the packaging preservative film is discarded is as follows:
the waste preservative film is immersed in weak alkaline water with the concentration of 2% -3% at 65 ℃, taken out after the film cracks, kneaded into a ball shape, naturally dried and recycled. The alkaline water is domestic alkali, and comprises: sodium bicarbonate, edible alkali, washing powder, laundry detergent, etc.
The waste recovered by the water-soluble vacuum packaging preservative film can be ground into powder and directly filled into an exterior wall coating for use, can also be filled into an aqueous coating for use, and can be hydrolyzed, photodegraded and biodegraded in nature.
In the invention, the fresh-keeping time test and the waste water solubility test are carried out on the water-soluble vacuum packaging fresh-keeping film, and the test method comprises the following steps:
(1) coating meat food with the vacuum packaging preservative film, dissolving in water, naturally airing, storing at 10 ℃, 20 ℃, 30 ℃ and 35 ℃, observing and recording the quality guarantee date, wherein the test result is shown in the table (I);
(2) coating vegetables and fruits by using the vacuum packaging preservative film disclosed by the invention, dissolving in water, naturally airing, storing at the temperature of 10 ℃, 20 ℃, 30 ℃ and 35 ℃, observing the quality guarantee date and recording as shown in the table II;
(3) the inner layer preservative film and the outer layer coating film of the water-soluble vacuum packaging preservative film are overlapped and then attached to a glass plate, the preservative film is immersed in water to swell into a whole and then taken out for natural drying, then the glass plate is immersed in fresh water and alkaline water, the water-soluble condition is observed and recorded as shown in the table (III);
(4) in the present invention, the test film thickness is:
inner layer preservative film: 30um, 40um, 50um, 60 um. Coating a film on the outer layer: 20um, 25 um, 30um, 40 um.
The test result shows that: the preservation time of vacuum packaging of the cooked meat food can reach 90 days at the low temperature of 10 ℃ and the relative humidity of 50 percent, and can reach 60 days when the environmental temperature is 20 ℃; when the environmental temperature is 30 ℃, the quality guarantee period can reach 15 days; when the environmental temperature is 35 ℃, the preservation time is 6 days.
The test result shows that:
under the conditions of low temperature of 10 ℃ and relative humidity of 50%, the preservation time of vacuum packaging of vegetables and fruits can reach 120 days, and when the environmental temperature is 20 ℃, the preservation time can reach 90 days; when the environmental temperature is 30 ℃, the preservation time can reach 50 days; when the ambient temperature is 35 ℃, the preservation time is 30 days.
The test result proves that:
the water-soluble vacuum packaging preservative film can be completely dissolved in water after 30 days in fresh water at 65 ℃, can be completely dissolved in water after 40 days in fresh water at 30 ℃, can be completely dissolved in water within 6 days in alkaline water at 65 ℃ and 3 percent, and can be completely dissolved in water after 2 days in alkaline water at 28 ℃ and 3 percent.
The test result proves that:
the water-soluble vacuum packaging preservative film can be quickly dissolved into particles by adopting a hot water alkali-soluble mode in the process of eliminating the white pollution of the waste film, so that the problem of the white pollution is solved.
To further illustrate the invention, examples 1-3 are now further illustrated, but should not be construed as limiting the scope of the invention.
Example 1 to example 3
The formula design of the inner layer preservative film is calculated by mass fraction
Comprises the following components:
| inner layer preservative film component | Component ranges | Example 1 | Example 2 | Example 3 |
| Aqueous polyacrylic acid solution | 45%—60% | 45% | 50% | 60% |
| Acetylated monoglycerides | 0.5%—1% | 0.5% | 1% | 0.7% |
| Sorbic acid | 0.2%—0.5% | 0.2% | 0.5% | 0.3% |
| Triethyl tin chloride | 0.5%—1.5% | 0.5% | 1.5% | 1% |
| Muramidase enzyme | 2%—3% | 2% | 2.5% | 3% |
| Sucrose polyester | 0.5%—1.5% | 0.5% | 1% | 1.5% |
| 7. 1.3-BDO Diphenyl Ether Formate | 1%—2% | 2% | 1% | 1.5% |
| Acetyl tributyl citrate | 1%—4% | 1% | 4% | 2% |
| Gelatin water solution (food grade) | 3%—10% | 10% | 5% | 3% |
| Oxalic acid | 2%—5% | 3% | 5% | 2% |
| Aqueous oxidized starch solutions | 8%—20% | 20% | 15% | 8% |
| Polyethylene glycol | 1%—3.5% | 1% | 3.5% | 2% |
| Vitamin C or vitamin E | 2%—4% | 4% | 3% | 2% |
| Solvent(s) | Balance of | Balance of | Balance of | Balance of |
In examples 1-3, the polyacrylic acid solids content was: 12%, 15% and 18%, the molecular weights are: 5000. 4000 and 3000.
The solid content of the gelatin water solution is 12%, 15% and 18% respectively; the solid content of the oxidized starch aqueous solution is respectively as follows: 12%, 15% and 18%.
Examples 1 to 3
The formulation design of the outer coating film is calculated by mass fraction
Comprises the following components:
| outer layer preservative film component | Component ranges | Example 1 | Example 2 | Example 3 |
| Aqueous polyethylene oxide solution | 75%—85% | 70% | 85% | 75% |
| Aqueous polyethylene glycol solution | 5%—20% | 20% | 5% | 10% |
| 1.2-BDO Diphenyl Ether Formate | 1%—4% | 2% | 1.5% | 4% |
| Sucrose polyester | 0.5%—2.5% | 0.5% | 2.5% | 1.5% |
| Solvent: water + ethanol 95: 5 | Proper amount of | Proper amount of | Proper amount of | Proper amount of |
In examples 1 to 3, the solids contents of the aqueous polyoxyalkylene solutions were: 20%, 27% and 35%. The molecular weights are respectively: 50000. 40000 and 30000.
In examples 1-3, the aqueous polyethylene glycol solution has a solid content of 10%, 15%, 20%, respectively. The molecular weights are respectively: 13000. 12000 and 11000.
In examples 1-3, the designed thickness of the inner layer preservative film of the water-soluble vacuum packaging preservative film is respectively 30um, 40um and 50 um. The design thickness of the outer coating film is respectively as follows: 20um, 30um, 40 um.
Example 1 preparation of inner preservative film:
using a coating liquid preparation method well known to those skilled in the art, 45 parts of an aqueous polyacrylic acid solution, 0.5 part of acetylated monoglyceride, 0.2 part of sorbic acid, 0.5 part of triethyltin chloride, 2 parts of muramidase, 0.5 part of sucrose polyester, 2 parts of 1.3-BDO dibenzoate, 1 part of tributyl acylcitrate, 10 parts of an aqueous gelatin solution, 3 parts of oxalic acid, 20 parts of an aqueous oxidized starch solution, 4 parts of vitamin C (or vitamin E) and 1 part of polyethylene glycol in the components of example 1 were prepared into a preservative film coating liquid. And finally, adding a proper amount of solvent to adjust the preservative film coating liquid to have a solid content of 42%, and defoaming for 4 hours after filtering to obtain the preservative film coating liquid.
The preservative film coating liquid is coated into the preservative film by a casting coating process well known to those skilled in the art. Example 1 the cling film coating thickness was 30 um. And (3) rewinding and drying the coated preservative film at the drying temperature of 40 ℃ at the drying linear speed of 25m/min, standing for 4h at the normal temperature of 28 ℃ and under the humidity of 30% after drying, and immediately packaging the preservative film, wherein the inner layer is formed by packaging tinfoil, the outer layer is wax-coated kraft paper, and the outermost layer is packaged by a PP film to obtain the water-soluble inner-layer preservative film.
Example 2 inner preservative film preparation:
55 parts of an aqueous polyacrylic acid solution, 1 part of acetylated monoglyceride, 0.5 part of sorbic acid, 1.5 parts of triethyltin chloride, 2.5 parts of muramidase, 1 part of sucrose polyester, 1 part of 1.3-BDO dibenzoate, 4 parts of tributyl acylcitrate, 5 parts of an aqueous gelatin solution, 5 parts of oxalic acid, 15 parts of an aqueous oxidized starch solution, 3 parts of vitamin C (or vitamin E) and 3.5 parts of polyethylene glycol in the components of example 2 are prepared into a preservative film coating solution by a coating solution preparation method well known to those skilled in the art, and finally an appropriate amount of water is added to adjust the preservative film coating solution to a solid content of 45%. Defoaming was carried out for 4 hours after filtration to obtain a preservative film coating liquid of example 2.
The preservative film coating liquid of the example 2 is coated into the preservative film by a casting coating process well known to those skilled in the art, and the coating thickness of the preservative film of the example 2 is 40 um.
And rewinding and drying the coated preservative film, keeping the drying temperature at 42 ℃ and the drying linear speed at 22m/min, standing for 4h at the normal temperature of 28 ℃ and the humidity of 30%, immediately packaging, wherein the inner layer is tin paper, the outer layer is waxed kraft paper, and the outermost layer is PP film packaging.
Example 3 preparation of inner preservative film:
using a coating liquid preparation method well known to those skilled in the art, 60 parts of an aqueous polyacrylic acid solution, 0.7 part of acetylated monoglyceride, 0.3 part of sorbic acid, 1 part of triethyltin chloride, 3 parts of muramidase, 1.5 parts of sucrose polyester, 1.5 parts of 1.3-BDO dibenzoate, 2 parts of acetyl tributyl citrate, 3 parts of an aqueous gelatin solution, 2 parts of an oxalic acid film-forming agent, 8 parts of an aqueous oxidized starch solution, 2 parts of vitamin C (or vitamin E) and 2 parts of polyethylene glycol in the components of example 3 were prepared into a preservative film coating liquid, and finally an appropriate amount of water was added to adjust the preservative film coating liquid to a solid content of 48%. Defoaming was carried out for 4 hours after filtration to obtain a preservative film coating liquid of example 2.
The preservative film coating liquid of example 2 was coated into a preservative film having a thickness of 50um using a cast coating process well known to those skilled in the art.
And rewinding and drying the coated preservative film at the drying temperature of 45 ℃ at the drying linear speed of 23m/min, standing for 4h at the normal temperature of 28 ℃ and the humidity of 30% after drying, and immediately packaging, wherein the inner layer is tin paper, the outer layer is waxed kraft paper, and the outermost layer is PP film packaging.
Example 1 outer layer coating film preparation:
using a coating liquid preparation method well known to those skilled in the art, 70 parts of an aqueous polyethylene oxide solution, 20 parts of an aqueous polyethylene glycol solution, 2 parts of 1.3-BDO dibenzoate, 0.5 part of sucrose polyester and an appropriate amount of solvent in the outer coating film component of example 1: (water + ethanol 95: 5) to prepare coating liquid for coating the outer layer, filtering and defoaming, and then using.
The outer-layer coating liquid of example 1 was prepared into an outer-layer coating film having a thickness of 20um by a casting coating process well known to those skilled in the art.
And (3) rewinding and drying the coated outer layer coating film, wherein the drying temperature is 40 ℃, the drying linear speed is 25m/min, standing for 4 hours at the normal temperature of 28 ℃ and the relative humidity of 40%, and then packaging, wherein the inner layer is tinfoil, the outer layer is waxed kraft paper, and the outermost layer is PP film packaging.
Example 2 preparation of outer coating film:
using a coating liquid preparation process well known to those skilled in the art, 85 parts of an aqueous polyethylene oxide solution, 5 parts of an aqueous polyethylene glycol solution, 1.5 parts of 1.3-BDO dibenzoate, 2.5 parts of sucrose polyester and an appropriate amount of solvent in the outer coating composition of example 2: (water + ethanol 95: 5) to prepare coating liquid for coating the outer layer, filtering and defoaming, and then using.
The outer-layer coating liquid of example 2 was prepared into an outer-layer coating film having a thickness of 30um by a casting coating process well known to those skilled in the art.
And (3) rewinding and drying the coated outer layer coating film, wherein the drying temperature is 40 ℃, the drying linear speed is 23/min, standing for 4 hours at the normal temperature of 28 ℃ and the relative humidity of 40%, and then packaging, wherein the inner layer is tinfoil, the outer layer is waxed kraft paper, and the outermost layer is PP film packaging.
Example 3 outer layer coating film preparation:
using a coating fluid preparation process well known to those skilled in the art, 75 parts of a water soluble polyethylene oxide, 10 parts of a water soluble polyethylene glycol, 4 parts of 1.3-BDO dibenzoate, 1.5 parts of sucrose polyester and an appropriate amount of solvent in the outer coating composition of example 3: (water + ethanol 95: 5) to prepare coating liquid for coating the outer layer, filtering and defoaming, and then using.
The outer coating liquid of example 3 was prepared into an outer coating film having a thickness of 40um by a casting coating process well known to those skilled in the art.
And (3) rewinding and drying the coated outer layer coating film, wherein the drying temperature is 45 ℃, the drying linear speed is 20m/min, standing for 4 hours at the normal temperature of 28 ℃ and the relative humidity of 40%, and then packaging, wherein the inner layer is tinfoil, the outer layer is waxed kraft paper, and the outermost layer is PP film packaging.
In examples 1-3, the technical indexes and requirements of various raw materials in the inner preservative film and the outer coating film are consistent with the technical scheme, and the types and sources of the raw materials of polyacrylic acid and polyethylene oxide are consistent with the technical scheme.
In examples 1 to 3, the performance of the inner preservative film and the outer coating film was tested, and the test method and the results thereof were consistent with the above technical solutions and will not be described herein again.
The application method comprises the following steps:
the preservative film prepared from the components of practical 1-example 3 is applied to the preservation of cooked meat products.
(1) The sausage is wrapped on the sausage three times after the inner layer preservative film of 50um of the example 3 and the outer layer wrapping film of 30um of the example 3 are overlapped, and the sausage is wound and tightened by a rope, and one end of the sausage is tied with a suspension buckle;
(2) the sausage wrapped with the preservative film is immersed in water for about 10-15S by using a portable suspension buckle, the water surface is taken out immediately after the inner and outer films are completely absorbed and swelled into a whole, and the sausage is naturally dried in a suspension mode or dried by using a blower;
(3) if there is air leakage or there is air inside, the hole can be punctured to release air, then a film is attached again, and water is sprayed to swell and then the film is dried;
(4) when the food is eaten, the preservative film is torn off, and the surface of the food is washed by water to be eaten.
The used waste film is soaked in weak alkaline water at 60 ℃ to be smashed into pieces and then is kneaded into a ball for recycling.
The waste of the water-soluble vacuum packaging preservative film can be ground into powder and directly filled into outdoor wall paint to be used as waterproof paint, and can also be directly added into water-based paint to be used as filling material.
The invention relates to a water-soluble vacuum packaging preservative film, which is characterized in that: the two films can be thickened according to the requirements of food, namely, the inner layer preservative film can be wrapped by two layers, the outer layer wrapping film can be wrapped by two layers, and the thickened vacuum packaging film is obtained after the two layers are dissolved in water to form a whole. The double-layer package can greatly prolong the fresh-keeping effect of meat food at high temperature.
The water-soluble vacuum packaging preservative film disclosed by the invention not only has a preservative effect on food, but also can achieve a vacuum packaging effect, so that the obtained food can be stored at normal temperature. Also has a certain shelf life.
The water-soluble vacuum packaging preservative film disclosed by the invention is not required to be vacuumized mechanically or electrically when being used, so that the packaging cost is greatly saved, only water is used as a solvent, the using method is simple, the application range is wide, and the water-soluble vacuum packaging preservative film is almost suitable for each family, all food industries and food packaging. The waste can be soaked in weak alkali water at 65 ℃ for swelling and then recovered. The recovered material can be directly used as auxiliary material of connecting material of water paint.
The water-soluble vacuum packaging preservative film is nontoxic and tasteless, has no harm to human bodies in the production process and the application process, has no pollution to the environment, has no release of any harmful gas, and is an environment-friendly novel packaging material.
Claims (8)
1. The water-soluble vacuum packaging preservative film is characterized in that: the plastic wrap include nexine plastic wrap and outer covering film, wherein:
the inner layer preservative film comprises the following components in percentage by mass:
45% -60% of polyacrylic acid aqueous solution;
0.5 to 1 percent of acetyl monoglyceride;
sorbic acid 0.2-0.5%;
0.5 to 1.5 percent of triethyl tin chloride;
muramidase 2% -3%;
sucrose polyester 0.5% -1.5%;
1.3-BDO dibenzoate 1% -2%;
1% -4% of acetyl tributyl citrate;
3% -10% of gelatin aqueous solution;
2% -5% of oxalic acid;
8% -20% of oxidized starch aqueous solution;
1% -3.5% of polyethylene glycol;
2% -4% of vitamin C or vitamin E;
the balance of solvent;
the outer coating film comprises the following components in percentage by mass:
75% -85% of polyoxyethylene aqueous solution;
5% -20% of polyethylene glycol aqueous solution;
1.3-BDO dibenzoate 1% -4%;
sucrose polyester 0.5% -2.5%;
solvent: the balance;
the solvent is prepared from the following components in percentage by mass of 95: 5 water and ethanol.
2. The water-soluble vacuum packaging preservative film is characterized in that: the plastic wrap include nexine plastic wrap and outer covering film, wherein:
the inner layer preservative film comprises the following components in percentage by mass:
53% -54% of polyacrylic acid aqueous solution;
0.7 to 0.8 percent of acetyl monoglyceride;
sorbic acid 0.35-0.4%;
1% -1.2% of triethyl tin chloride;
muramidase 2.5-2.6%;
1% -1.2% of sucrose polyester;
1.5 to 1.6 percent of 1.3-BDO dibenzoate;
2% -3% of acetyl tributyl citrate;
5% -8% of gelatin aqueous solution;
3.5 to 4 percent of oxalic acid;
12% -18% of oxidized starch aqueous solution;
2.5% -2.8% of polyethylene glycol;
3% -3.5% of vitamin C or vitamin E;
the balance of solvent;
the outer coating film comprises the following components in percentage by mass:
80% -82% of polyoxyethylene aqueous solution;
12% -16% of polyethylene glycol aqueous solution;
2.5% -3% of 1.3-BDO dibenzoate;
1.3% -1.8% of sucrose polyester;
solvent: the balance;
the solvent is prepared from the following components in percentage by mass of 95: 5 water and ethanol.
3. The water-soluble vacuum packaging preservative film as claimed in claim 1, wherein: in the inner preservative film component:
the solid content of the polyacrylic acid aqueous solution is 10-20%; molecular weight is 3000-5000; the solid content of the gelatin water solution is 10-20%; the solid content of the oxidized starch aqueous solution is 10-20 percent; the molecular weight of the polyethylene glycol is 15000-;
the outer coating film component comprises:
the solid content of the polyoxyethylene aqueous solution is 20-35%, and the molecular weight of the polyoxyethylene is 20000-100000; the solid content of the polyethylene glycol aqueous solution is 10-20 percent, and the molecular weight is 10000-13000.
4. The water-soluble vacuum packaging preservative film as claimed in claim 1, wherein:
the thickness of the inner preservative film is 30-60 um;
the thickness of the outer layer coating film is 20um-40 um.
5. The use method of the water-soluble vacuum packaging preservative film according to claim 1, characterized by comprising the following steps: comprises the following steps:
(1) the inner preservative film and the outer coating film are overlapped and then coated outside the food to be preserved, and the inner preservative film is ensured to be tightly attached to the food without gaps;
(2) and (3) immersing the food wrapped with the preservative film into normal-temperature water for 10-15 seconds, and taking out the food to be naturally dried in a hanging mode when the inner layer and the outer layer of the preservative film absorb water, swell and are dissolved into a whole, so as to obtain the vacuum-packaged preservative food.
6. The use method of the water-soluble vacuum packaging preservative film according to claim 5, characterized in that: if the dried preservative film is damaged or contains gas, the preservative film and the outer-layer coating film can be subsidized, or a part containing gas is perforated and deflated, then a piece of preservative film and an outer-layer coating film are subsidized, and the subsidized part is wetted by water and swelled and then dried again.
7. The use method of the water-soluble vacuum packaging preservative film according to claim 5, characterized in that: after the preservation effect is finished, namely the preserved food is taken, the preservative film is torn off, and the surface of the food is washed clean by water for eating.
8. The use method of the water-soluble vacuum packaging preservative film according to claim 7, characterized in that: and (3) soaking the torn waste preservative film in hot weak-alkali water at the temperature of over 65 ℃ for 10h, or soaking the preservative film in normal-temperature weak-alkali water for 72h and then hydrolyzing, thus realizing harmless treatment.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1106031A (en) * | 1993-10-20 | 1995-08-02 | 吴羽化学工业株式会社 | Gas barrier film and production process thereof |
| CN1112059A (en) * | 1994-01-26 | 1995-11-22 | 吴羽化学工业株式会社 | Laminate and production process thereof |
| EP1110546A1 (en) * | 1999-12-23 | 2001-06-27 | Johnson & Johnson Consumer Companies, Inc. | Method of preparing a water soluble film |
| CN1480496A (en) * | 2002-08-02 | 2004-03-10 | ����ڶ�-PPC�ɷ�����˾ | Polyacrylic acid film forming compsn. |
| CN1812773A (en) * | 2003-05-28 | 2006-08-02 | 莫诺索尔克斯有限公司 | Polyethylene oxide-based films and drug delivery systems made therefrom |
| CN102888270A (en) * | 2012-10-26 | 2013-01-23 | 广西壮族自治区分析测试研究中心 | Food-grade lubricant using sucrose polyester as base oil and preparation method thereof |
| CN103205005A (en) * | 2013-03-15 | 2013-07-17 | 华南理工大学 | Anti-microbial and bacteriostatic preservative film and production method thereof |
| CN105088766A (en) * | 2015-09-07 | 2015-11-25 | 王璐 | Mould-proof antibacterial agent for fabric |
| CN109156520A (en) * | 2018-10-24 | 2019-01-08 | 淮阴师范学院 | A kind of green composite preservative of Green leaf vegetable anti-corrosion guarantor |
-
2022
- 2022-01-28 CN CN202210103978.5A patent/CN114410044A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1106031A (en) * | 1993-10-20 | 1995-08-02 | 吴羽化学工业株式会社 | Gas barrier film and production process thereof |
| CN1112059A (en) * | 1994-01-26 | 1995-11-22 | 吴羽化学工业株式会社 | Laminate and production process thereof |
| EP1110546A1 (en) * | 1999-12-23 | 2001-06-27 | Johnson & Johnson Consumer Companies, Inc. | Method of preparing a water soluble film |
| CN1480496A (en) * | 2002-08-02 | 2004-03-10 | ����ڶ�-PPC�ɷ�����˾ | Polyacrylic acid film forming compsn. |
| CN1812773A (en) * | 2003-05-28 | 2006-08-02 | 莫诺索尔克斯有限公司 | Polyethylene oxide-based films and drug delivery systems made therefrom |
| CN102888270A (en) * | 2012-10-26 | 2013-01-23 | 广西壮族自治区分析测试研究中心 | Food-grade lubricant using sucrose polyester as base oil and preparation method thereof |
| CN103205005A (en) * | 2013-03-15 | 2013-07-17 | 华南理工大学 | Anti-microbial and bacteriostatic preservative film and production method thereof |
| CN105088766A (en) * | 2015-09-07 | 2015-11-25 | 王璐 | Mould-proof antibacterial agent for fabric |
| CN109156520A (en) * | 2018-10-24 | 2019-01-08 | 淮阴师范学院 | A kind of green composite preservative of Green leaf vegetable anti-corrosion guarantor |
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