CN109334141B - Plate structure of insulation box and preparation method thereof - Google Patents

Plate structure of insulation box and preparation method thereof Download PDF

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Publication number
CN109334141B
CN109334141B CN201811063888.8A CN201811063888A CN109334141B CN 109334141 B CN109334141 B CN 109334141B CN 201811063888 A CN201811063888 A CN 201811063888A CN 109334141 B CN109334141 B CN 109334141B
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oxide film
porous anodic
insulation
aluminum oxide
pass porous
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CN109334141A (en
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曾庆丽
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Polymer Rotomolding Co ltd
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Polymer Rotomolding Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0084—Foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The invention discloses a plate structure of an insulation can and a preparation method thereof, wherein the plate structure comprises an insulation layer and outer surface layers arranged on two sides of the insulation layer, the outer side of the outer surface layer is a smooth plane, a single-pass porous anodic aluminum oxide film is fixed on the inner side of the outer surface layer, the single-pass porous anodic aluminum oxide film comprises a sealing surface and an opening surface, the opening surface is full of small holes with single-side openings and consistent opening directions, the small holes are in contact with the insulation layer, and the single-pass porous anodic aluminum oxide film is fixed on the inner side of the outer surface layer, so that a three-dimensional nano structure with a positive specific surface is provided, adhesion of polyurethane molecules of the insulation layer is facilitated, the insulation layer and a polyethylene shell are tightly combined and are not easy to separate, and the insulation effect of the insulation can is effectively improved.

Description

Plate structure of insulation box and preparation method thereof
Technical Field
The invention relates to a packaging material, in particular to a plate structure of an insulation box and a preparation method thereof.
Background
The insulation can mostly comprises a shell and foaming materials filled in the shell, and as the foaming materials are mostly high-polarity polymer materials, such as polyurethane, and the shells are mostly nonpolar polymer materials, such as polyethylene, the adhesion force of an insulation layer formed after the foaming agent is solidified to the shell is not strong, so that the insulation layer is easily separated from the shell, and the insulation effect of the insulation can is affected.
In order to solve the problems, the technical staff sprays small linear low-density polyethylene particles on the inner side of the shell to manufacture a rough surface, so that the adhesion of polyurethane is facilitated, but the powder spraying operation is difficult to ensure uniform coverage, too much or too little powder spraying is unfavorable for the adhesion of polyurethane, and the specific surface area increased by the method is very limited, so that the adhesion of polyurethane is still not high, and the delamination phenomenon still exists.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a plate structure of an insulation can with compact structure and good insulation effect and a preparation method thereof.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a panel structure of insulation can, includes the heat preservation and sets up the extexine in the heat preservation both sides, the outside of extexine is smooth plane, and the inboard is fixed with single-pass porous anodic aluminum oxide film, single-pass porous anodic aluminum oxide film includes enclosure surface and opening face, the aperture that the opening face is full of unilateral opening and opening direction are unanimous, the aperture contacts with the heat preservation.
The thickness of the single-pass porous anodic aluminum oxide film is 3-5 microns.
The aperture of the small hole is 600-800 nanometers.
The pore depth of the small pores is 1-2 microns.
The outer surface layer is made of polyethylene, auxiliary resin and reinforcing agent, and the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:1-2:0.1-0.6.
The auxiliary resin is one or a mixture of more than one of polylactic acid, polycarbonate and polyamide in any proportion.
The reinforcing agent is one or a mixture of more than one of barium sulfate, calcium carbonate and sodium sulfate in any proportion.
The heat-insulating layer is formed by curing a polyurethane foaming agent.
The method for preparing the plate structure of the incubator comprises the following steps:
1) Cutting aluminum foil according to actual demands, respectively ultrasonically oscillating and cleaning the aluminum foil for 5 minutes by using acetone and ethanol, and then soaking the aluminum foil in 0.5-1.0mol/L sodium hydroxide solution until bubbles are separated out from the surface of the aluminum foil;
2) Electrochemical polishing is carried out on the aluminum foil treated in the step 1) until the surface is mirror smooth, the voltage is 12V, the polishing solution is a mixed solution of perchloric acid and ethanol, and the volume ratio of perchloric acid to ethanol is 1:1;
3) Placing the aluminum foil treated in the step 2) in a constant-temperature water bath at 20-25 ℃, simultaneously setting a stirrer, taking another aluminum sheet as a counter electrode, taking an electrolyte solution of 1.5-2.0mol/L sulfuric acid solution, and soaking the aluminum foil in a mixed solution of 1.8% chromic acid and 6.0% phosphoric acid for removing a film after oxidation, thereby completing primary anodic oxidation;
4) Repeating the operation of the step 3) again on the aluminum foil prepared in the step 3), and finishing secondary anodic oxidation;
5) Changing the anode and cathode of the power supply, setting the voltage to 15-20V, and separating the aluminum foil from the aluminum substrate to obtain the single-pass porous anodic aluminum oxide film;
6) Adding the polyethylene, the auxiliary resin and the reinforcing agent into a stirrer, and stirring at a low speed of 60-100r/min for 5-10 minutes to obtain an outer surface layer raw material;
7) Adding the outer surface layer raw material into a hot die, solidifying for 10 minutes at 300-350 ℃, then placing the single-pass porous anodic aluminum oxide film prepared in the step 5), enabling the sealing surface of the single-pass porous anodic aluminum oxide film to be in contact with the single-pass porous anodic aluminum oxide film, continuing solidifying for 5-10 minutes, standing and cooling to obtain the outer surface layer fixed with the single-pass porous anodic aluminum oxide film;
8) Injecting a foaming material between two outer surface layers fixed with the single-pass porous anodic aluminum oxide film, wherein the foaming temperature is 20-25 ℃, the heuristic time is 10-15s, the curing time is 30-50s, and the heat insulation layer is formed by complete curing after 8-24 hours, so that the plate structure of the heat insulation box is obtained.
The beneficial effects of the invention are as follows: the single-pass porous anodic aluminum oxide film is fixed on the inner side of the outer surface layer, so that a three-dimensional nano structure with a positive specific surface is provided, adhesion of polyurethane molecules of the heat preservation layer is facilitated, the heat preservation layer and the polyethylene shell are tightly combined and are not easy to separate, and the heat preservation effect of the heat preservation box is effectively improved.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
Referring to fig. 1, a board structure of an insulation can includes an insulation layer 3 and outer surface layers 1 disposed on two sides of the insulation layer 3, wherein the insulation layer 3 can be formed by curing with foaming agents commonly used in the art, and the foaming agents adopted in the following embodiments are all polyurethane foaming agents, and the insulation layer formed by the polyurethane foaming agents has multiple excellent characteristics of super low temperature heat conductivity, heat resistance, heat preservation, shock resistance, compression resistance, water resistance, moisture resistance and the like. The main preparation raw materials of the outer surface layer 1 are polyethylene, auxiliary resin and reinforcing agent, the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:1-2:0.1-0.6, and the auxiliary resin needs to have a glass transition temperature higher than or equal to that of the polyethylene, such as polylactic acid, polycarbonate and polyamide, or a mixture of more than one of the polyethylene, the polycarbonate and the polyamide in any proportion. The mechanical properties of the polyethylene are changed by adding auxiliary resin, so that a small amount of reinforcing agent such as one or more of barium sulfate, calcium carbonate and sodium sulfate or a mixture of more than one of the reinforcing agents in any proportion is required to be added.
The outer side of the outer surface layer 1 is a smooth plane, and a single-pass porous anodic aluminum oxide film 2 is fixed on the inner side of the outer surface layer, and the thickness of the single-pass porous anodic aluminum oxide film 2 is 3-5 microns. The single-pass porous anodic aluminum oxide film 2 comprises a sealing surface and an opening surface, wherein the opening surface is full of small holes with single-side openings and consistent opening directions, the aperture is 600-800 nanometers, the hole depth is 1-2 micrometers, and the small holes are in contact with the heat preservation layer 3. The single-pass porous anodic aluminum oxide film 2 is obtained by anodic oxidation of aluminum foil in acid electrolyte, and the aperture and morphology can be flexibly controlled by controlling oxidation conditions (such as electrolyte, electrolysis voltage and the like). The single-pass porous anodic aluminum oxide film 2 finally prepared by the invention has high-density pore distribution and slender pore channels, provides a three-dimensional nano structure with a positive specific surface, is favorable for adhesion of polyurethane molecules of the heat preservation layer 3, ensures that the heat preservation layer 3 is tightly combined with a polyethylene shell and is not easy to separate, and effectively improves the heat preservation effect of the heat preservation box.
Example 1:
the utility model provides a panel structure of insulation can, includes heat preservation 3 and sets up extexine 1 in heat preservation 3 both sides, the outside of extexine 1 is smooth plane, and the inboard is fixed with single-pass porous anodic alumina membrane 2, the thickness 3 micron of single-pass porous anodic alumina membrane 2, single-pass porous anodic alumina membrane 2 includes enclosure surface and opening face, the aperture that the opening face is full unilateral opening and opening direction are unanimous, and the aperture is 800 nanometers, and the hole depth is 1 micron, the aperture contacts with heat preservation 3.
The outer surface layer 1 is made of polyethylene, auxiliary resin and reinforcing agent, and the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:2:0.6. The auxiliary resin is polylactic acid, the reinforcing agent is barium sulfate, and the heat preservation layer 3 is formed by curing a polyurethane foaming agent.
The method for preparing the plate structure of the incubator comprises the following steps:
1) Cutting aluminum foil according to actual demands, respectively ultrasonically oscillating and cleaning with acetone and ethanol for 5 minutes, washing off greasy dirt on the surface of the aluminum foil, then soaking the aluminum foil in 0.5-1.0mol/L sodium hydroxide solution until bubbles are separated out on the surface, and removing a natural oxide layer;
2) Electrochemical polishing is carried out on the aluminum foil treated in the step 1) until the surface is mirror smooth, the voltage is 12V, the polishing solution is a mixed solution of perchloric acid and ethanol, and the volume ratio of perchloric acid to ethanol is 1:1;
3) Placing the aluminum foil treated in the step 2) in a constant-temperature water bath at 20-25 ℃, setting a stirrer at the stirring speed of 800r/min to ensure uniform temperature distribution in the constant-temperature water bath, taking another aluminum sheet with larger area as a counter electrode, taking 1.5-2.0mol/L sulfuric acid solution as electrolyte, and soaking the aluminum sheet with the voltage of 25-30V in a mixed solution of 1.8% chromic acid and 6.0% phosphoric acid to remove a film after oxidation is finished, thus finishing primary anodic oxidation;
4) Repeating the operation of the step 3) on the sample prepared in the step 3), namely finishing secondary anodic oxidation;
5) Changing the anode and cathode of the power supply to set the voltage to 15-20V, and separating the aluminum foil from the aluminum substrate by utilizing the bubbling action of hydrogen evolution to obtain the single-pass porous anodic aluminum oxide film 2;
6) Adding the polyethylene, the auxiliary resin and the reinforcing agent into a stirrer, and stirring at a low speed of 60-100r/min for 5-10 minutes to obtain an outer surface layer raw material;
7) Adding the outer surface layer raw material into a hot die, solidifying for 10 minutes at 300-350 ℃, heating, melting and adhering polyethylene contacted with the hot die to form a smooth outer side of the outer surface layer 1, uniformly mixing the auxiliary resin and polyethylene which is not contacted with the hot die in a incompletely melted state because the auxiliary resin has larger particle size than the polyethylene and higher or equal glass transition temperature, and then melting slowly, putting the single-pass porous anodic aluminum oxide film prepared in the step 5) into the single-pass porous anodic aluminum oxide film, enabling a sealing surface of the single-pass porous anodic aluminum oxide film 2 to be contacted with the single-pass porous anodic aluminum oxide film, continuing solidifying for 5-10 minutes, standing and cooling to obtain the outer surface layer 1 fixed with the single-pass porous anodic aluminum oxide film 2;
8) And (3) injecting a polyurethane foaming agent between the two outer surface layers 1 fixed with the single-pass porous anodic aluminum oxide film 2, wherein the foaming temperature is 20-25 ℃, the heuristic time is 10-15s, the curing time is 30-50s, and the thermal insulation layer 3 is formed by complete curing after 8-24 hours, so that the thermal insulation box board is prepared.
Example 2:
the utility model provides a panel structure of insulation can, includes heat preservation 3 and sets up extexine 1 in heat preservation 3 both sides, the outside of extexine 1 is smooth plane, and the inboard is fixed with single-pass porous anodic alumina membrane 2, the thickness 5 microns of single-pass porous anodic alumina membrane 2, single-pass porous anodic alumina membrane 2 includes enclosure surface and opening face, the aperture that the opening face is full unilateral opening and opening direction are unanimous, and the aperture is 600 nanometers, and the hole depth is 2 microns, the aperture contacts with heat preservation 3.
The outer surface layer 1 is made of polyethylene, auxiliary resin and reinforcing agent, and the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:1.5:0.35. The auxiliary resin is polycarbonate, the reinforcing agent is calcium carbonate, and the heat preservation layer 3 is formed by curing a polyurethane foaming agent.
The method for preparing the plate structure of the incubator is the same as in example 1.
Example 3:
the utility model provides a panel structure of insulation can, includes heat preservation 3 and sets up extexine 1 in heat preservation 3 both sides, the outside of extexine 1 is smooth plane, and the inboard is fixed with single-pass porous anodic alumina membrane 2, the thickness 4 microns of single-pass porous anodic alumina membrane 2, single-pass porous anodic alumina membrane 2 includes enclosure surface and opening face, the aperture that the opening face is full unilateral opening and opening direction are unanimous, and the aperture is 700 nanometers, and the hole depth is 1.5 microns, the aperture contacts with heat preservation 3.
The outer surface layer 1 is made of polyethylene, auxiliary resin and reinforcing agent, and the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:1:0.1. The auxiliary resin is polyamide, the reinforcing agent is sodium sulfate, and the heat preservation layer 3 is formed by curing a polyurethane foaming agent.
The method for preparing the plate structure of the incubator is the same as in example 1.
The thermal conductivity of 3 examples and the control group were measured by a flat plate thermal conductivity meter using a commercially available ordinary insulation box plate having the same thickness as the examples as the control group.
Detection result: the thermal conductivity of example 1 was 0.022W/(m.K), the thermal conductivity of example 2 was 0.019W/(m.K), the thermal conductivity of example 3 was 0.020W/(m.K), and the thermal conductivity of the control group was 0.043W/(m.K). From the data, the heat conduction coefficients of the 3 embodiments are smaller than those of the control group, which shows that the invention effectively improves the heat insulation performance of the heat insulation box.
The above embodiments do not limit the protection scope of the invention, and those skilled in the art can make equivalent modifications and variations without departing from the whole inventive concept, and they still fall within the scope of the invention.

Claims (5)

1. The plate structure of the insulation can comprises an insulation layer (3) and outer surface layers (1) arranged on two sides of the insulation layer (3), and is characterized in that the outer side of the outer surface layer (1) is a smooth plane, a single-pass porous anodic aluminum oxide film (2) is fixed on the inner side of the outer surface layer, the single-pass porous anodic aluminum oxide film (2) comprises a sealing surface and an opening surface, small holes which are opened on one side and have the same opening direction are distributed on the opening surface, and the small holes are in contact with the insulation layer (3);
the preparation method of the plate structure of the insulation can comprises the following steps:
1) Cutting aluminum foil according to actual demands, respectively ultrasonically oscillating and cleaning the aluminum foil for 5 minutes by using acetone and ethanol, and then soaking the aluminum foil in 0.5-1.0mol/L sodium hydroxide solution until bubbles are separated out from the surface of the aluminum foil;
2) Electrochemical polishing is carried out on the aluminum foil treated in the step 1) until the surface is mirror smooth, the voltage is 12V, the polishing solution is a mixed solution of perchloric acid and ethanol, and the volume ratio of perchloric acid to ethanol is 1:1;
3) Placing the aluminum foil treated in the step 2) in a constant-temperature water bath at 20-25 ℃, simultaneously setting a stirrer, taking another aluminum sheet as a counter electrode, taking an electrolyte solution of 1.5-2.0mol/L sulfuric acid solution, and soaking the aluminum foil in a mixed solution of 1.8% chromic acid and 6.0% phosphoric acid for removing a film after oxidation, thereby completing primary anodic oxidation;
4) Repeating the operation of the step 3) again on the aluminum foil prepared in the step 3), and finishing secondary anodic oxidation;
5) Changing the anode and cathode of the power supply, setting the voltage to 15-20V, and separating the aluminum foil from the aluminum substrate to obtain the single-pass porous anodic aluminum oxide film (2);
6) Adding polyethylene, auxiliary resin and reinforcing agent into a stirrer, and stirring at a low speed of 60-100r/min for 5-10 minutes to obtain an outer surface layer raw material; the outer surface layer (1) is made of polyethylene, auxiliary resin and reinforcing agent, and the mass ratio of the polyethylene to the auxiliary resin to the reinforcing agent is 100:1-2:0.1-0.6; the auxiliary resin is one or a mixture of more than one of polylactic acid, polycarbonate and polyamide in any proportion; the reinforcing agent is one or a mixture of more than one of barium sulfate, calcium carbonate and sodium sulfate in any proportion;
7) Adding the outer surface layer raw material into a hot die, solidifying for 10 minutes at 300-350 ℃, then placing the single-pass porous anodic aluminum oxide film (2) prepared in the step 5), enabling the sealing surface of the single-pass porous anodic aluminum oxide film (2) to be in contact with the single-pass porous anodic aluminum oxide film, continuing solidifying for 5-10 minutes, standing and cooling to obtain the outer surface layer (1) fixed with the single-pass porous anodic aluminum oxide film (2);
8) Injecting a foaming material between two outer surface layers (1) fixed with a single-pass porous anodic aluminum oxide film (2), wherein the foaming temperature is 20-25 ℃, the heuristic time is 10-15s, the curing time is 30-50s, and the thermal insulation layer (3) is formed by complete curing after 8-24 hours, so that the plate structure of the thermal insulation box is manufactured.
2. The plate structure of an incubator according to claim 1, characterized in that the thickness of the single-pass porous anodic alumina film (2) is 3-5 microns.
3. The insulation can panel structure of claim 1, wherein the pores have a pore size of 600-800 nanometers.
4. The insulation can panel structure of claim 1, wherein the apertures have a hole depth of 1-2 microns.
5. A board structure of an incubator according to claim 1, characterized in that the insulation layer (3) is formed by curing a polyurethane foaming agent.
CN201811063888.8A 2018-09-12 2018-09-12 Plate structure of insulation box and preparation method thereof Active CN109334141B (en)

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CN201811063888.8A CN109334141B (en) 2018-09-12 2018-09-12 Plate structure of insulation box and preparation method thereof

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