CN112779792A - Degradable snack box packing material and its making process - Google Patents
Degradable snack box packing material and its making process Download PDFInfo
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- CN112779792A CN112779792A CN202011550539.6A CN202011550539A CN112779792A CN 112779792 A CN112779792 A CN 112779792A CN 202011550539 A CN202011550539 A CN 202011550539A CN 112779792 A CN112779792 A CN 112779792A
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- acrylonitrile
- acrylamide
- acrylic acid
- packaging material
- degradable
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- 235000011888 snacks Nutrition 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 title abstract description 11
- 238000012856 packing Methods 0.000 title description 2
- 229920001897 terpolymer Polymers 0.000 claims abstract description 63
- JYLTYGKNPRAOJY-UHFFFAOYSA-N prop-2-enamide;prop-2-enenitrile;prop-2-enoic acid Chemical compound C=CC#N.NC(=O)C=C.OC(=O)C=C JYLTYGKNPRAOJY-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000005022 packaging material Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 229920000728 polyester Polymers 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 235000013305 food Nutrition 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 56
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 23
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 23
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 23
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 23
- 239000011780 sodium chloride Substances 0.000 claims description 21
- 229920002261 Corn starch Polymers 0.000 claims description 16
- 239000008120 corn starch Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 239000008399 tap water Substances 0.000 claims description 7
- 235000020679 tap water Nutrition 0.000 claims description 7
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 244000299461 Theobroma cacao Species 0.000 claims 1
- 235000009470 Theobroma cacao Nutrition 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 235000013410 fast food Nutrition 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1607—Degradability
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/20—Packaging
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Wrappers (AREA)
Abstract
The invention provides a degradable snack box packaging material and a preparation method thereof. The packaging material comprises food-grade degradable polyester non-woven fabric and moisture absorption liquid coated on the surface of the non-woven fabric, wherein the thickness of the moisture absorption liquid is 1-100nm, and the moisture absorption liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer water absorption resin. When the degradable snack box packaging material provided by the application is used for disposable take-away snack boxes, food is kept fresh within 1h, the taste is good, the prepared material can be fully degraded in natural environment, namely, the material can be degraded in the environment after being used for 3 months, the degraded material is a green and harmless substance, and the preparation method is simple and easy, green and environment-friendly, and is a safe and economic preparation process.
Description
Technical Field
The invention relates to a degradable snack box packaging material, in particular to a degradable snack box packaging material and a preparation method thereof.
Background
With the development of social economy, people pursue to eat food instead of being full, and meanwhile, due to the high-speed development of the traffic industry, the food industry develops rapidly, and the circulation and the scale become wider and wider. During the circulation and transportation of food, how to maintain the quality of the food is a key.
The fast food is a dining mode selected by many people at present, the generated fast food garbage is more and more, great pressure is brought to the environment, and the food cannot be kept fresh due to overlong time in the fast food transportation process, so that high requirements are put forward for the fast food box used by the fast food, the fast food box material in the prior art cannot be degraded or is degraded for a long time, and therefore how to provide the degradable fast food box and ensure the taste of the food is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a degradable snack box packaging material and a preparation method thereof so as to overcome the defects that the snack box material in the prior art can not be degraded or the degradation time is longer and the food can not be preserved.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
a degradable snack box packaging material comprises food-grade degradable polyester non-woven fabrics and moisture absorption liquid coated on the surface of the non-woven fabrics,
the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.
Wherein the thickness of the hygroscopic solution is 1-100 nm.
Optionally, the upper limit of the thickness of the hygroscopic solution is selected from 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100 nm; the lower limit of the thickness of the moisture absorption liquid is selected from 1nm, 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm and 90 nm.
Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt% to 30 wt% of the content of the hygroscopic solution.
Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 15 wt%, 20 wt%, 25 wt% and 30 wt% of the upper limit of the content of the hygroscopic solution; the lower limit of the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt%, 15 wt%, 20 wt% and 25 wt% of the content of the moisture absorption liquid.
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
Optionally, the specification of the food-grade degradable polyester non-woven fabric is 60-70 g/m2。
Optionally, the specification of the food-grade degradable polyester non-woven fabric is 65g/m2。
Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000.
Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 50000-60000.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1 to 2:1 to 4.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 1.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 1.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 2.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 3.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 4.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 2.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 3.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 4.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 25.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 30.
Optionally, the particle size of the sodium chloride edible salt is 100-300 nm.
Optionally, the upper limit of the particle size of the sodium chloride edible salt is selected from 150nm, 200nm, 250nm and 300 nm; the lower limit of the particle size of the sodium chloride edible salt is selected from 100nm, 150nm, 200nm and 250 nm.
The degradable snack box packaging material is applied to disposable take-out packaging boxes.
Compared with the prior art, the invention has the advantages that: when the degradable snack box packaging material provided by the application is used for disposable take-away snack boxes, food is kept fresh within 1h, the taste is good, the prepared material can be fully degraded in natural environment, namely, the material can be degraded in the environment after being used for 3 months, the degraded material is a green and harmless substance, and the preparation method is simple and easy, green and environment-friendly, and is a safe and economic preparation process.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
A degradable snack box packaging material comprises food-grade degradable polyester non-woven fabrics and moisture absorption liquid coated on the surface of the non-woven fabrics,
the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.
Wherein the thickness of the hygroscopic solution is 1-100 nm.
Optionally, the upper limit of the thickness of the hygroscopic solution is selected from 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100 nm; the lower limit of the thickness of the moisture absorption liquid is selected from 1nm, 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm and 90 nm.
Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt% to 30 wt% of the content of the hygroscopic solution.
Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 15 wt%, 20 wt%, 25 wt% and 30 wt% of the upper limit of the content of the hygroscopic solution; the lower limit of the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt%, 15 wt%, 20 wt% and 25 wt% of the content of the moisture absorption liquid.
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
Optionally, the specification of the food-grade degradable polyester non-woven fabric is 60-70 g/m2。
Optionally, the specification of the food-grade degradable polyester non-woven fabric is 65g/m2。
Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000.
Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 50000-60000.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1 to 2:1 to 4.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 1.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 1.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 2.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 3.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 4.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 2.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 3.
Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 4.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 25.
Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 30.
Optionally, the particle size of the sodium chloride edible salt is 100-300 nm.
Optionally, the upper limit of the particle size of the sodium chloride edible salt is selected from 150nm, 200nm, 250nm and 300 nm; the lower limit of the particle size of the sodium chloride edible salt is selected from 100nm, 150nm, 200nm and 250 nm.
The degradable snack box packaging material is applied to food packaging.
Optionally, the degradable snack box packaging material is applied to a take-away snack box.
The technical solution of the present invention is further explained below with reference to several examples.
Each of the substances in the examples is commercially available.
Example 1
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2 h at the temperature of 30 ℃ to obtain a viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 1.
Example 2
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into saturated sodium chloride solution, and stirring for 3h at 40 ℃ to obtain viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:2: 1.
Example 3
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into saturated sodium chloride solution, and stirring at 50 deg.C for 3 hr to obtain viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 2.
Example 4
A preparation method of a degradable snack box packaging material comprises the following steps:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into saturated sodium chloride solution, and stirring for 3h at 60 ℃ to obtain viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.
The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 3.
When the degradable snack box packaging materials prepared in the embodiments 1 to 4 are used for disposable take-away snack boxes, food can be kept fresh within 1 hour, the taste is good, and the prepared materials can be fully degraded in natural environment, namely can be degraded in the environment within 3 months after being used, and become green and harmless substances after being degraded.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A degradable snack box packaging material is characterized by comprising food-grade degradable polyester non-woven fabric and moisture absorption liquid coated on the surface of the non-woven fabric,
wherein the thickness of the hygroscopic solution is 1-100 nm;
the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.
2. A degradable snack box packaging material of claim 1 wherein said acrylamide-acrylonitrile-acrylic acid terpolymer is present in an amount of 10 wt% to 30 wt% of the moisture absorbing liquid.
3. A method of making a degradable snack box packaging material of any of claims 1-2 comprising the steps of:
(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;
(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;
(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;
(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front side and the back side of the food-grade degradable polyester non-woven fabric, and finally obtaining the degradable snack box packaging material after drying.
4. The method for preparing the degradable snack box packaging material of claim 3, wherein the food grade degradable polyester nonwoven fabric has a specification of 60-70 g/m2。
5. The method for preparing the degradable snack box packaging material of claim 3, wherein the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000;
preferably, the molar weight ratio of the acrylamide, the acrylonitrile and the acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1-2: 1-4.
6. The preparation method of the degradable snack box packaging material of claim 3, wherein the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.
7. The method for preparing the degradable snack box packaging material as recited in claim 3, wherein the particle size of the sodium chloride edible salt is 100-300 nm.
8. The method for preparing a degradable snack box packaging material of claim 3, wherein the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 20 wt% to 30 wt% of the content of the moisture absorption liquid.
9. Use of a degradable snack box packaging material prepared according to any of claims 1-2 or a cocoa degradable snack box packaging material prepared according to any of claims 3-8 in food packaging.
10. Use according to claim 9, wherein the degradable snack box packaging material is used in disposable take-away snack boxes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011550539.6A CN112779792A (en) | 2020-12-24 | 2020-12-24 | Degradable snack box packing material and its making process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011550539.6A CN112779792A (en) | 2020-12-24 | 2020-12-24 | Degradable snack box packing material and its making process |
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| Publication Number | Publication Date |
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| CN112779792A true CN112779792A (en) | 2021-05-11 |
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| CN202011550539.6A Pending CN112779792A (en) | 2020-12-24 | 2020-12-24 | Degradable snack box packing material and its making process |
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