CN107760198B - Coating agent and preparation method thereof, packaging box adopting coating agent and manufacturing method of packaging box - Google Patents
Coating agent and preparation method thereof, packaging box adopting coating agent and manufacturing method of packaging box Download PDFInfo
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- CN107760198B CN107760198B CN201610674721.XA CN201610674721A CN107760198B CN 107760198 B CN107760198 B CN 107760198B CN 201610674721 A CN201610674721 A CN 201610674721A CN 107760198 B CN107760198 B CN 107760198B
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- food
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- styrene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D191/00—Coating compositions based on oils, fats or waxes; Coating compositions based on derivatives thereof
- C09D191/06—Waxes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/22—Polyalkenes, e.g. polystyrene
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- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
- Packages (AREA)
Abstract
The invention discloses a coating agent which is characterized by consisting of food-grade paraffin, food-grade microcrystalline wax, an ethylene-vinyl acetate copolymer, polyethylene and a styrene-isoprene-styrene block copolymer. The coating agent is used for coating the packaging box, and the waterproof, breathable and fresh-keeping effects of the packaging box are achieved.
Description
Technical Field
The invention relates to the technical field of food packaging, in particular to a waterproof exhaust coating agent, a preparation method of the coating agent, a packaging box adopting the coating agent and a manufacturing method of the packaging box.
Background
The special waterproof air-exhausting fresh-keeping food-grade wax-coated packing box is mainly used for packing the compressed and frozen meat products, and has the advantages that the requirements on the packing of the compressed and frozen foods are very strict, the requirements on absolute waterproof and moisture-proof are strict, only air can be exhausted but not air can be exhausted, the air in the compressed and frozen foods is completely exhausted, the contact surface of the compressed and frozen foods with the packing box is smooth and flat, no pit is formed, and the compressed and frozen foods are easy to peel.
The technical requirements of the waterproof, exhaust and fresh-keeping food wax-coated packing box product are as follows:
1. waterproof and moistureproof
The meat-wrapped food has larger water content, and the processing, packaging and storage have very high requirements on the waterproof and moistureproof effects of the package in low-temperature and humid processing workshops and cold storages.
2. Exhaust fresh-keeping
The ventilation of air can bring away the moisture contained in the meat food to dry and oxidize the food, thereby reducing the shelf life, and the gas of the product wrapped in the packaging box is completely removed and can not be aerated again.
3. Safety feature
The packaging box is in direct contact with meat food, and the water-proof exhaust chemical coating falls off and dissolves, and the residual substances after the high-temperature reaction of the chemical foaming agent bring secondary pollution to the food.
The formula of the coating agent used for realizing the waterproof, exhausting and fresh-keeping functions of the packaging box in the market at present comprises the following components:
a. mixed paraffin and chemical foaming agent
The components of the composition are as follows: 50% of food-grade paraffin, 30% of food-grade microcrystalline wax, 10% of ethylene-vinyl acetate copolymer, 7% of polyethylene and 3% of benzoic acid.
The defects are as follows: the residual substances of the benzoic acid after the high-temperature reaction are contacted with the wrapped meat food, which can bring secondary pollution.
b. Special emulsifying wax
The components of the composition are as follows: 48% of water, 43% of paraffin, 4% of stearic acid and 5% of sodium chloride.
The defects are as follows: the water-based polymer is formed by the formula, and when the coating of the water-based polymer is contacted with the wrapped meat food, the water is absorbed and dissolved, so that secondary pollution is brought.
The conventional packaging box is prepared by selecting appropriate base material and dissolving CO2Is applied to a substrate, during which process CO2The heated wax is released to leave gaps, but the gaps are quickly filled by flowing wax, so that the air permeability is unstable, and the exhaust effect cannot be really realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a coating agent, a method for preparing the coating agent, a packaging box made of the coating agent and a manufacturing method.
In order to achieve the purpose, the invention adopts the following technical scheme: the coating agent is characterized by consisting of food-grade paraffin, food-grade microcrystalline wax, ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer.
Wherein, the coating agent consists of 55-65 wt% of food-grade paraffin wax, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer.
Preferably, the coating agent consists of 60 wt% of food grade paraffin wax, 20 wt% of food grade microcrystalline wax, 10 wt% of ethylene-vinyl acetate copolymer, 5 wt% of polyethylene, and 5 wt% of styrene-isoprene-styrene block copolymer.
A preparation method of a coating agent is characterized by comprising the following steps:
s1, weighing 55-65 wt% of food-grade paraffin wax, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
A packaging box is characterized by comprising base paper, a solid carbon dioxide layer coated on the base paper and a coating agent layer.
Preferably, the coating agent layer is composed of 55-65 wt% of food grade paraffin wax, 15-25 wt% of food grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene, and 3-7 wt% of styrene-isoprene-styrene block copolymer.
Preferably, the coating agent layer is composed of 60 wt% of food grade paraffin wax, 20 wt% of food grade microcrystalline wax, 10 wt% of ethylene-vinyl acetate copolymer, 5 wt% of polyethylene, and 5 wt% of styrene-isoprene-styrene block copolymer.
The manufacturing method of the packaging box is characterized by comprising the following steps:
s1, sprinkling solid carbon dioxide particles on the base paper;
s2, the base paper treated in S1 is coated with a coating agent.
Adopt above-mentioned scheme: the coating agent is coated after the solid carbon dioxide particles absorb heat of the coating agent, the carbon dioxide particles expand and prop open the coating agent layer to form air holes, the coating agent solidifies after releasing heat, the leveling effect is not achieved, the air holes are stable, and the air permeation effect is good.
Preferably, the weight ratio of the solid carbon dioxide to the coating agent is 1: 1.
Preferably, the coating agent consists of 55-65 wt% of food grade paraffin wax, 15-25 wt% of food grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer.
Preferably, the coating agent layer is composed of 60 wt% of food grade paraffin wax, 20 wt% of food grade microcrystalline wax, 10 wt% of ethylene-vinyl acetate copolymer, 5 wt% of polyethylene, and 5 wt% of styrene-isoprene-styrene block copolymer.
In conclusion, the coating agent is used for coating the packaging box, the waterproof, breathable and fresh-keeping effects of the packaging box are realized, the binding force between the packaging box and the wrapped meat food is not small after the packaging box and the wrapped meat food are frozen, the packaging box is beneficial to peeling and has certain binding force for binding, the air is completely isolated from entering, the quality guarantee period of the wrapped food is prolonged, and the phenomenon of air drying and dehydration cannot occur after long-term storage; in addition, the packaging box coated by the coating agent has no explosion danger and corrosivity, no residue pollutes the food wrapped in the packaging box, and the safety is good.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
fig. 1 is a schematic structural view of the packing box of the present invention.
Detailed Description
Example 1
S1, weighing 55g of food-grade paraffin wax, 16g of food-grade microcrystalline wax, 15g of ethylene-vinyl acetate copolymer, 7g of polyethylene and 7g of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the food-grade microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
Example 2
S1, weighing 60g of food-grade paraffin wax, 20g of food-grade microcrystalline wax, 10g of ethylene-vinyl acetate copolymer, 5g of polyethylene and 5g of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the food-grade microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
Example 3
S1, weighing 65g of food-grade paraffin wax, 24g of food-grade microcrystalline wax, 5g of ethylene-vinyl acetate copolymer, 3g of polyethylene and 3g of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the food-grade microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
Example 4
S1, weighing 56g of food-grade paraffin, 15g of food-grade microcrystalline wax, 15g of ethylene-vinyl acetate copolymer, 7g of polyethylene and 7g of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the food-grade microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
The food-grade paraffin adopts the grades of 52,54,56 and 58 to meet the requirements of the coating agent, but when the 58# food-grade paraffin is adopted, the compounding effect of the coating agent and microcrystalline wax is better, when the coating agent prepared by the formula is coated on a base material, the waterproof performance is excellent, and the packaging box can not generate the phenomenon of blackening in the processes of filling aquatic products and subsequent storage.
Fig. 1 is a schematic structural diagram of the packing box of the present invention, which comprises a base paper 1, a solid carbon dioxide layer 3 coated on the base paper 1 and a coating agent layer 2. The coating agent in the coating agent layer 2 was the coating agent prepared in any of examples 1,2,3, and 4.
The manufacturing method of the packaging box comprises the following steps:
s1, sprinkling solid carbon dioxide particles on the base paper 1;
s2, the base paper treated in S1 is coated with a coating agent.
The solid carbon dioxide particles absorb the heat of the coating agent to be gasified and discharged from the surface of the packaging box, pores are reserved on the coating agent, the coating agent releasing the heat is solidified, fixed air holes are formed in the packaging box, and the ventilation is stable.
The packing box of the invention is tested for waterproof, air permeable and fresh-keeping performance.
1. Waterproof performance detection method
The packing box is filled with aquatic food for 7-30 minutes, and the waterproof performance is judged by observing whether the packing box turns black or not.
2. Air permeability detection method
The packaging box is filled with aquatic food, the aquatic food is compressed and frozen by a flat plate freezer, the meat is turned into a frozen block, and the air permeability of the packaging box is judged by observing whether holes are formed in the surface of the frozen block.
3. Fresh-keeping and adhesive property detection method
The packaging box is filled with aquatic food, the aquatic food is compressed and frozen by a flat plate freezer, meat is turned into a frozen block, and the fresh-keeping and the bonding performance of the packaging box are judged by observing the bonding state of the frozen block and the packaging box.
The packaging boxes treated with the coating compositions prepared in examples 1,2,3,4 are waterproof, breathable and adhesive
Can be as shown in table 1.
After aquatic food is filled in the packaging box, the aquatic food is compressed and frozen by using a flat plate freezer, in the compression process, moisture in fish meat is extruded and filled into gaps and concave parts of the fish meat, gas in the gaps and the concave parts of the fish fillet is extruded and discharged through the air holes of the packaging box, no residual gas exists on the surfaces of the frozen meat blocks to form air holes, and the fresh-keeping time of the frozen meat blocks with the discharged gas is longer because the air circulation is reduced.
The meat jelly blocks filled in the packaging box are bonded with the packaging box, so that the internal gaps of the packaging box are reduced, the moisture and possible oxidation in the meat jelly blocks are reduced, and the original flavor of the meat jelly blocks is kept; the frozen meat block is easy to peel off from the packaging box, so that the situation that the frozen meat block peels the box to be broken in the subsequent box peeling process to cause residual fragments to affect the quality of the frozen meat block is avoided.
The foregoing detailed description is given by way of example only, to better enable one of ordinary skill in the art to understand the patent, and is not to be construed as limiting the scope of what is encompassed by the patent; any equivalent alterations or modifications made according to the spirit of the disclosure of this patent are intended to be included in the scope of this patent.
Claims (7)
1. The coating agent is characterized by consisting of 55-65 wt% of food-grade paraffin wax, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer.
2. The coating composition of claim 1, wherein said coating composition comprises 60% by weight of food grade paraffin wax, 20% by weight of food grade microcrystalline wax, 10% by weight of ethylene vinyl acetate copolymer, 5% by weight of polyethylene, and 5% by weight of styrene-isoprene-styrene block copolymer.
3. A preparation method of a coating agent is characterized by comprising the following steps:
s1, weighing 55-65 wt% of food-grade paraffin wax, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer;
s2, putting the food-grade paraffin and the food-grade microcrystalline wax into a reaction kettle, heating to 120 ℃, and stirring for 15 minutes after the food-grade paraffin and the food-grade microcrystalline wax are completely melted;
s3, adding ethylene-vinyl acetate copolymer, polyethylene and styrene-isoprene-styrene block copolymer into S2 in sequence, completely melting, and stirring for 30 minutes.
4. A package box is characterized by comprising base paper (1), a solid carbon dioxide layer (3) coated on the base paper (1) and a coating agent layer (2), wherein the solid carbon dioxide layer (3) is prepared by sprinkling solid carbon dioxide particles on the base paper (1), and the coating agent layer (2) is composed of 55-65 wt% of food-grade paraffin, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer.
5. The packet according to claim 4, characterized in that said coating agent layer (2) consists of 60% by weight of food-grade paraffin wax, 20% by weight of food-grade microcrystalline wax, 10% by weight of ethylene-vinyl acetate copolymer, 5% by weight of polyethylene, 5% by weight of styrene-isoprene-styrene block copolymer.
6. The manufacturing method of the packaging box is characterized by comprising the following steps:
s1, sprinkling solid carbon dioxide particles on the base paper (1);
s2, coating the base paper (1) treated by the S1 with a coating agent, wherein the coating agent is composed of 55-65 wt% of food-grade paraffin wax, 15-25 wt% of food-grade microcrystalline wax, 5-15 wt% of ethylene-vinyl acetate copolymer, 3-7 wt% of polyethylene and 3-7 wt% of styrene-isoprene-styrene block copolymer.
7. The method of manufacturing a packing box according to claim 6, wherein the weight ratio of the solid carbon dioxide to the coating agent is 1: 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674721.XA CN107760198B (en) | 2016-08-17 | 2016-08-17 | Coating agent and preparation method thereof, packaging box adopting coating agent and manufacturing method of packaging box |
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| CN201610674721.XA CN107760198B (en) | 2016-08-17 | 2016-08-17 | Coating agent and preparation method thereof, packaging box adopting coating agent and manufacturing method of packaging box |
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| CN107760198A CN107760198A (en) | 2018-03-06 |
| CN107760198B true CN107760198B (en) | 2021-04-20 |
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| CN112030599A (en) * | 2020-09-02 | 2020-12-04 | 上海金星包装材料有限公司 | Blending wax for coating aquatic product packaging boxes and preparation method thereof |
| CN113881339A (en) * | 2021-09-10 | 2022-01-04 | 盐城工学院 | Preparation method of special waterproof packaging wax |
| CN115558425B (en) * | 2022-11-01 | 2023-05-26 | 苏州海迈汽车防护材料有限公司 | Rust-proof wax and preparation method thereof |
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| GB983829A (en) * | 1963-08-07 | 1965-02-17 | Sun Oil Co | Coating composition containing wax, thermoplastic petroleum resin and ethylene-vinyl acetate copolymer |
| US5112674A (en) * | 1989-11-07 | 1992-05-12 | Exxon Chemical Company Inc. | Cling packaging film for wrapping food products |
| CN101333414A (en) * | 2008-08-05 | 2008-12-31 | 无锡信达胶脂材料有限公司 | Coatings wax of high melting point and method for preparing same |
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