CN114684447A - Barrier material, preparation method thereof and packaging container - Google Patents
Barrier material, preparation method thereof and packaging container Download PDFInfo
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- CN114684447A CN114684447A CN202011613097.5A CN202011613097A CN114684447A CN 114684447 A CN114684447 A CN 114684447A CN 202011613097 A CN202011613097 A CN 202011613097A CN 114684447 A CN114684447 A CN 114684447A
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- 239000000463 material Substances 0.000 title claims abstract description 96
- 230000004888 barrier function Effects 0.000 title claims abstract description 90
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 53
- 239000000835 fiber Substances 0.000 claims abstract description 49
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 25
- -1 ammonium carboxylate salts Chemical class 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 6
- 239000008103 glucose Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 24
- 239000010408 film Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 7
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002799 BoPET Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 abstract description 16
- 239000001301 oxygen Substances 0.000 abstract description 16
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 229920002678 cellulose Polymers 0.000 description 6
- 239000001913 cellulose Substances 0.000 description 6
- 238000012856 packing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- TWNIBLMWSKIRAT-VFUOTHLCSA-N levoglucosan Chemical group O[C@@H]1[C@@H](O)[C@H](O)[C@H]2CO[C@@H]1O2 TWNIBLMWSKIRAT-VFUOTHLCSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002201 Oxidized cellulose Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000402 conductometric titration Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000027734 detection of oxygen Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229940107304 oxidized cellulose Drugs 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- 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
- B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
- B65D11/16—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material with double walls
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/30—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants by excluding light or other outside radiation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a barrier material, a preparation method thereof and a packaging container. The barrier material comprises a base material, a fiber layer and a filler layer which are connected to form a bonding body; the raw materials of the fiber layer comprise cellulose fiber and polyvinyl alcohol; wherein the mass ratio of the cellulose fibers to the polyvinyl alcohol is 1 (10-100); the cellulose fibers are cellulose fibers comprising ammonium carboxylate salts; the average content of carboxylic acid ammonium salt in the cellulose fiber is 0.05-3 mmol/mol glucose; the raw material of the filler layer comprises aluminum oxide or silicon oxide. The layers of the barrier material provided by the invention have mutual synergistic effect, so that the permeation of ultraviolet rays, water vapor and oxygen can be effectively avoided, and the light barrier property, the water vapor barrier property and the oxygen barrier property of the barrier material are enhanced.
Description
Technical Field
The invention relates to a barrier material, a preparation method thereof and a packaging container.
Background
In the field of packaging, barrier materials are used very widely, in particular for food, in order to avoid uv light, water vapour or oxygen from penetrating the package and to prolong the shelf life of the product. Although the penetration of ultraviolet rays, water vapor or oxygen does not necessarily cause damage to the product itself, the long-term exposure to the above-mentioned environment may cause problems such as aging, deterioration or oxidation of the product, thereby affecting the shelf life. Therefore, it is important that the barrier material has a good light barrier property, a good water vapor barrier property, or a good oxygen barrier property.
However, the barrier materials of the prior art do not perform well in terms of light barrier properties, water vapor barrier properties, oxygen barrier properties, and the like, and it is difficult to achieve both of them. Therefore, a barrier material having excellent light barrier property, water vapor barrier property or oxygen barrier property is desired.
Disclosure of Invention
The invention aims to solve the problem that the light barrier property, the water vapor barrier property or the oxygen barrier property of the barrier material in the prior art is poor, and the problems of aging, deterioration or oxidation and the like of a product cannot be effectively avoided, and provides the barrier material, a preparation method thereof and a packaging container. The layers of the barrier material provided by the invention have mutual synergistic effect, so that the permeation of ultraviolet rays, water vapor and oxygen can be effectively avoided, and the light barrier property, the water vapor barrier property and the oxygen barrier property of the barrier material are enhanced; and the preparation process of the barrier material is simple, convenient and feasible, and is beneficial to realizing industrial production.
In order to achieve the purpose, the invention provides the following technical scheme:
one of the technical schemes provided by the invention is as follows: a barrier material. The barrier material comprises a base material, a fiber layer and a filler layer which are connected to form an adhesive body;
the raw materials of the fiber layer comprise cellulose fiber and polyvinyl alcohol; wherein the mass ratio of the cellulose fibers to the polyvinyl alcohol is 1 (10-100); the cellulose fibers are cellulose fibers comprising ammonium carboxylate salts; the average content of carboxylic acid ammonium salt in the cellulose fiber is 0.05-3 mmol/mol glucose;
the raw material of the filler layer comprises aluminum oxide or silicon oxide.
In the present invention, the substrate may be conventional in the art, such as a paper substrate, a textile substrate, a nonwoven fabric substrate or a film substrate, preferably a film substrate.
The film substrate may be a porous film substrate or a polymer film substrate, such as a PET film substrate or a polypropylene film substrate.
The PET film substrate may be conventional in the art, and is typically polyethylene terephthalate as the starting material.
In the invention, the average diameter of the cellulose fiber can be 2-100 nm; preferably 5 to 80nm, and more preferably 70 nm. The average crystallinity of the cellulose fibers can be 50-99%; preferably 60 to 95%, more preferably 78%.
In the invention, after the cellulose is oxidized into carboxylic acid, the cellulose is combined with ammonium ions which are fully excessive in a system to form carboxylic acid ammonium salt; the molar content of the ammonium carboxylate salt is generally equal to the molar content of the carboxylic acid in the oxidized cellulose.
The content of cellulose oxidized to carboxylic acid can generally be measured by conductometric titration, as follows:
100mg of cellulose fiber solid powder was weighed, added to 50mL of 0.01mol/L HCl solution, and dispersed uniformly by sonication to obtain a suspension. And titrating the suspension by using 0.02mol/L NaOH solution to obtain a titrated solution. And measuring the change condition of the conductivity of the titrated solution by using a conductivity meter, and obtaining a curve of the conductivity along with the change of the volume of the NaOH solution. The calculation formula of the carboxylic acid content (DO) in the cellulose is shown as the formula (I):
in formula (I): (V)2-V1) The volume of NaOH solution (mL) consumed for carboxyl groups in cellulose;
c is the concentration of NaOH solution (mol/L);
w is the mass (mg) of the cellulose sample;
162 is the relative molecular mass (g/mol) of the anhydroglucose units;
36 is the difference (g/mol) between sodium gluconate and Anhydroglucose (AGU).
The raw material of the fiber layer may further include montmorillonite. The mass ratio of the montmorillonite to the cellulose fiber can be 10 (1-100), and preferably 2: 1.
The raw material of the fiber layer preferably includes cellulose fiber, polyvinyl alcohol, and montmorillonite.
Preferably, the fiber layer is prepared by mixing the raw material of the fiber layer with an aqueous medium to prepare a dispersion, and drying the dispersion.
In the present invention, the smectite can be a layered mineral composed of hydrous aluminosilicate, which is conventional in the art, and the ingredient thereof is generally (Na, Ca)0.33(Al，Mg)2(Si4O10)(OH)2·nH2O。
In the invention, the preparation method of the filler layer can be realized by evaporating the raw material of the filler layer into a thin film.
In the present invention, the barrier material may comprise three or five layers. Preferably, adjacent two layers of the base material, the fiber layer and the filler layer are connected with each other.
When the barrier material comprises three layers, the barrier material may comprise a base material, a fibrous layer and a filler layer in this order; or, a base material, a filler layer and a fiber layer; alternatively, a filler layer, a base material, and a fiber layer.
When the barrier material comprises five layers, the barrier material can sequentially comprise a first filler layer, a first fiber layer, a base material, a second fiber layer and a second filler layer; or the first fiber layer, the first filler layer, the base material, the second fiber layer and the second filler layer; or the first fiber layer, the first filler layer, the base material, the second filler layer and the second fiber layer; or the first filler layer, the first fiber layer, the base material, the second filler layer and the second fiber layer.
Wherein the first packing layer and the second packing layer are the same or different. The first fibrous layer and the second fibrous layer are the same or different.
In the present invention, when the barrier material includes three layers, the thickness of the barrier material may be 11.5 to 349.5 μm, preferably 100.5 μm or 150 μm. For example, when the thickness of the barrier material is 150 μm, the thicknesses of the base material, the fiber layer, and the filler layer may be 80 μm, 20 μm, and 50nm, respectively.
When the barrier material includes five layers, the thickness of the barrier material may be 13 to 399 μm, preferably 121 μm or 220 μm. For example, when the thickness of the barrier material is 220 μm, the thicknesses of the first filler layer, the first fiber layer, the base material, the second fiber layer, and the second filler layer may be 50nm, 20 μm, 80 μm, 20 μm, and 50nm, respectively.
The second technical scheme provided by the invention is as follows: a method of making a barrier material as hereinbefore described. The barrier material may be prepared by methods conventional in the art, and typically the substrate, fibrous layer and filler layer are bonded by coating, casting or evaporation.
The third technical scheme provided by the invention is as follows: a packaging container comprising a barrier material as previously described.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
(1) the layers of the barrier material provided by the invention have mutual synergistic effect, so that the permeation of ultraviolet rays, water vapor and oxygen can be effectively avoided, and the light barrier property, the water vapor barrier property and the oxygen barrier property of the barrier material are enhanced.
(2) The preparation process of the barrier material is simple, convenient and feasible, and is beneficial to realizing industrial production.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the invention thereto. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
The thickness of the barrier material in example 1 was 100.5 μm and comprised, in order, a base material, a fibrous layer and a filler layer.
Wherein the base material is a polypropylene film base material, and the thickness is 80 μm;
the raw materials of the fiber layer comprise cellulose fiber, polyvinyl alcohol and montmorillonite in a mass ratio of 7:100:14, and the thickness of the fiber layer is 20 micrometers; wherein the cellulose fiber is cellulose fiber containing ammonium carboxylate, and the content of the ammonium carboxylate is 3mmol/mol glucose; the average diameter of the cellulose fibers is 70 nm; the average crystallinity of the cellulose fibers was 78%;
the raw material of the filler layer comprises aluminum oxide and the thickness of the filler layer is 50 nm.
The barrier material in example 1 was prepared by aqueous casting using a coater, followed by evaporation.
Example 2
The barrier material in example 2 comprises a base material, a filler layer and a fiber layer in sequence; the raw material of the packing layer comprises silicon oxide; the rest of the procedure was the same as in example 1.
Example 3
The thickness of the barrier material in example 3 was 121 μm and included a first filler layer, a first fiber layer, a base material, a second fiber layer, and a second filler layer in this order.
Wherein the base material is a polypropylene film base material, and the thickness is 80 μm;
the raw materials of the first fiber layer and the second fiber layer respectively and independently comprise cellulose fibers, polyvinyl alcohol and montmorillonite in a mass ratio of 7:100:14, and the thicknesses of the cellulose fibers and the polyvinyl alcohol are 20 micrometers; wherein the cellulose fiber is cellulose fiber containing ammonium carboxylate, and the content of the ammonium carboxylate is 3mmol/mol glucose; the average diameter of the cellulose fibers is 70 nm; the average crystallinity of the cellulose fibers was 78%;
the raw materials of the first filler layer and the second filler layer respectively and independently comprise aluminum oxide, and the thickness of each raw material is 50 nm.
The barrier material in example 3 was prepared by aqueous casting using a coater, followed by evaporation.
Example 4
The barrier material in example 4 comprises a first fiber layer, a first filler layer, a base material, a second filler layer, and a second fiber layer in this order; the raw materials of the first packing layer and the second packing layer respectively and independently comprise silicon oxide; the rest of the procedure was the same as in example 3.
Example 5
The barrier material in example 5 comprises a filler layer, a base material, and a fiber layer in this order; the rest of the procedure was the same as in example 1.
Comparative example 1
The barrier material of comparative example 1 did not include a fibrous layer, and the rest was the same as example 1.
Comparative example 2
The barrier material of comparative example 2 did not include the first filler layer and the second filler layer, and the rest was the same as example 3.
Comparative example 3
The barrier material of comparative example 3 was the same as that of example 1 except that the raw material of the fiber layer had a mass ratio of cellulose fibers to polyvinyl alcohol of 1: 1.
Comparative example 4
The barrier material of comparative example 4 was prepared by using the same material as that of example 1, except that the mass ratio of the cellulose fibers to the polyvinyl alcohol in the fibrous layer was 1: 150.
Comparative example 5
In the barrier material of comparative example 5, in the raw material of the fiber layer, the cellulose fiber was a cellulose fiber containing a carboxyl group, and the content of the carboxyl group was 3 mmol/mol; the rest of the procedure was the same as in example 1.
Comparative example 6
In the barrier material of comparative example 6, the average carboxylic acid ammonium salt content of the cellulose fibers in the raw material of the fiber layer was 5mmol/mol glucose; the rest of the procedure was the same as in example 1.
Comparative example 7
In the barrier material of comparative example 7, the raw material of the filler layer included copper; the rest of the procedure was the same as in example 1.
Effects of the embodiment
The barrier materials of the above examples and comparative examples were formed into packaging containers and tested for uv transmittance, oxygen transmittance and water vapor transmittance by the following methods, respectively:
ultraviolet transmittance: the test was performed using a ShimadZU UV-2600 spectrophotometer.
Oxygen transmission rate: the test was carried out according to Coulomb counter detection of oxygen permeability test for plastic films and sheets of GB/T19789-.
Water vapor transmission rate: the test was carried out according to the electrolytic sensor method for measuring the water vapor transmission rate of GB/T21529-2008 plastic films and sheets.
The test results are shown in table 1.
TABLE 1
As can be seen from table 1, the synergistic effect between the layers of the barrier materials in examples 1 to 5 can not only effectively prevent the penetration of ultraviolet rays, water vapor and oxygen, but also enhance the light barrier property, water vapor barrier property and oxygen barrier property.
Claims (10)
1. The barrier material is characterized by comprising a base material, a fiber layer and a filler layer which are connected to form a bonding body;
the raw materials of the fiber layer comprise cellulose fiber and polyvinyl alcohol;
wherein the mass ratio of the cellulose fibers to the polyvinyl alcohol is 1 (10-100); the cellulose fibers are cellulose fibers comprising ammonium carboxylate salts; the average content of carboxylic acid ammonium salt in the cellulose fiber is 0.05-3 mmol/mol glucose;
the raw material of the filler layer comprises aluminum oxide or silicon oxide.
2. The barrier material of claim 1, wherein the substrate is a paper substrate, a woven substrate, a non-woven substrate, or a film substrate; preferably a film substrate;
the film substrate is preferably a PET film substrate or a polypropylene film substrate.
3. The barrier material of claim 1, wherein the cellulose fibers have an average diameter of 2 to 100 nm; preferably 5-80 nm; more preferably 70 nm;
and/or the average crystallinity of the cellulose fiber is 50-99%; preferably 60-95%; more preferably 78%.
4. The barrier material of claim 1, wherein the raw materials of the fibrous layer further comprise montmorillonite;
in the raw material of the fiber layer, the mass ratio of the montmorillonite to the cellulose fiber is preferably 10 (1-100), and more preferably 2: 1.
5. The barrier material of claim 1 or 4, wherein the fibrous layer is prepared by mixing the raw materials of the fibrous layer with water to prepare a dispersion, and drying the dispersion.
6. The barrier material of claim 1, wherein the filler layer is prepared by evaporating a raw material of the filler layer into a thin film.
7. The barrier material of claim 1, wherein the barrier material comprises three or five layers;
preferably, adjacent two layers of the base material, the fiber layer and the filler layer are connected with each other.
8. The barrier material of claim 7, wherein when the barrier material comprises three layers, the barrier material comprises, in order, a substrate, a fibrous layer, and a filler layer; or, a base material, a filler layer and a fiber layer; alternatively, a filler layer, a base material, and a fiber layer;
when the barrier material comprises five layers, the barrier material sequentially comprises a first filler layer, a first fiber layer, a base material, a second fiber layer and a second filler layer; or the first fiber layer, the first filler layer, the base material, the second fiber layer and the second filler layer; or the first fiber layer, the first filler layer, the base material, the second filler layer and the second fiber layer; or the first filler layer, the first fiber layer, the base material, the second filler layer and the second fiber layer.
9. A method of producing a barrier material according to any one of claims 1 to 8, wherein the substrate, the fibrous layer and the filler layer are bonded by coating, casting or evaporation.
10. A packaging container, characterized in that it comprises a barrier material according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613097.5A CN114684447A (en) | 2020-12-30 | 2020-12-30 | Barrier material, preparation method thereof and packaging container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613097.5A CN114684447A (en) | 2020-12-30 | 2020-12-30 | Barrier material, preparation method thereof and packaging container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114684447A true CN114684447A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011613097.5A Withdrawn CN114684447A (en) | 2020-12-30 | 2020-12-30 | Barrier material, preparation method thereof and packaging container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114684447A (en) |
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2020
- 2020-12-30 CN CN202011613097.5A patent/CN114684447A/en not_active Withdrawn
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Application publication date: 20220701 |