CN116835147B - Long-aging cold chain transportation incubator and preparation method thereof - Google Patents
Long-aging cold chain transportation incubator and preparation method thereof Download PDFInfo
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- CN116835147B CN116835147B CN202310825663.6A CN202310825663A CN116835147B CN 116835147 B CN116835147 B CN 116835147B CN 202310825663 A CN202310825663 A CN 202310825663A CN 116835147 B CN116835147 B CN 116835147B
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- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 86
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 58
- 238000004321 preservation Methods 0.000 claims abstract description 55
- 238000009413 insulation Methods 0.000 claims abstract description 44
- 238000003466 welding Methods 0.000 claims abstract description 37
- 238000009825 accumulation Methods 0.000 claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
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- 238000000465 moulding Methods 0.000 claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000003054 catalyst Substances 0.000 claims description 16
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- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 230000032683 aging Effects 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 11
- 229920005862 polyol Polymers 0.000 claims description 10
- 150000003077 polyols Chemical class 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims description 9
- 238000011049 filling Methods 0.000 claims description 8
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- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 claims description 5
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 claims description 5
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
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- 238000011069 regeneration method Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 210000004204 blood vessel Anatomy 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
- B65D81/38—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 with thermal insulation
- B65D81/3813—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 with thermal insulation rigid container being in the form of a box, tray or like container
- B65D81/3818—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 with thermal insulation rigid container being in the form of a box, tray or like container formed with double walls, i.e. hollow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The application relates to the field of insulation boxes, and particularly discloses a long-aging cold chain transportation insulation box and a preparation method thereof. The long-time-effect cold chain transportation insulation box comprises a box body and a box cover, wherein the box body is connected with the box cover through a buckle, the box body comprises an insulation wall and a metal liner, the insulation wall is made of reinforced regenerated polyurethane foam, the box cover is made of reinforced regenerated polyurethane foam, and the insulation wall is bonded with the metal liner; the preparation method comprises the following steps: s1, placing the reinforced regenerated polyurethane foam into a mould for hot press molding; s2, welding a heat conduction pipe on the outer wall of the metal inner container, and welding the heat conduction pipe with the phase change cold accumulation plate; s3, placing the metal inner container into the heat preservation wall, and bonding the metal inner container and the heat preservation wall; s4, sticking a wear-resistant rubber pad on the outer wall of the heat preservation wall, and mounting a buckle. The method has the advantage of improving the mechanical property of the regenerated material for preparing the insulation can; in addition, the preparation method has the advantages of simplicity and high efficiency.
Description
Technical Field
The application relates to the technical field of insulation boxes, in particular to a long-aging cold chain transportation insulation box and a preparation method thereof.
Background
With the development of global economy and the improvement of the living standard of people, the development of logistics industry becomes more and more important. The logistics play an important role in the supply chain as socioeconomic blood vessels, however, as the production and consumption patterns change, the logistics industry is continuously improved and updated, including cold chain logistics.
Cold chain logistics is a special logistics, and is aimed at products such as food, medicine, cosmetics and the like which need constant temperature or low temperature storage, and the special transportation mode is adopted to keep the quality and safety of the products. The cold chain logistics carries out controlled logistics links from the starting point to the end point on the goods, and indexes such as temperature, humidity, smell, oxygen, carbon dioxide and the like are tracked so as to ensure the quality of the goods.
In the related art, the incubator used for cold chain transportation is generally made of foaming materials mainly comprising polyethylene, polypropylene or polystyrene, the manufacturing process of the incubator is simple, the manufacturing cost is low, the incubator is widely used in cold chain transportation, but a large amount of plastic garbage is formed as the incubator is abandoned after long-term use, and the environment is polluted, because the finished incubator contains a large amount of other components, and the incubator is naturally aged after long-term use, the intensity and the impact resistance of the incubator made of recycled materials by the conventional technology are obviously reduced, the durability is poor, and the practical effect is not ideal.
Disclosure of Invention
In order to improve the mechanical property of the regenerated material for preparing the insulation can, the application provides a long-aging cold chain transportation insulation can and a preparation method thereof.
In a first aspect, the present application provides a long-aging cold chain transportation incubator, which adopts the following technical scheme:
the utility model provides a long-term ageing cold chain transportation insulation can, includes box and case lid, the box passes through the buckle with the case lid and is connected, the box includes heat preservation wall and metal inner bag, the heat preservation wall is made by the regeneration-strengthening polyurethane foam, the case lid is made by the regeneration-strengthening polyurethane foam, the heat preservation wall bonds with the metal inner bag.
Through above-mentioned technical scheme, embedding metal inner bag in the heat preservation wall has strengthened the insulation can bulk strength, avoids causing the insulation can to warp the damage in transportation collision in-process, and the heat preservation wall of box is made by strengthening regeneration polyurethane foam, makes the insulation can possess good thermal insulation performance, also possess better intensity and shock resistance, has the effect that improves insulation can mechanical properties.
Optionally, the specific preparation process of the reinforced regenerated polyurethane foam comprises the following steps:
a1, crushing 500g of waste polyurethane foam into blocks with the length of 3-5mm, putting the blocks into a hydrothermal kettle, pouring 10-20g of catalyst and 1000-2000g of liquefying agent, heating to 180-220 ℃, and reacting for 3-5 hours;
a2, cooling the reaction kettle to room temperature, separating out liquid in the reaction kettle, and distilling at 140-160 ℃ and 0.05-0.08MPa to obtain liquefied polyol;
a3, adding 0.5-1g of catalyst, 5-10g of hard silicone oil, 10-15g of distilled water and modified graphene powder into the liquefied polyol obtained in the step A2, uniformly mixing and stirring, adding 1-3g of isocyanic acid cool, uniformly mixing under high-speed stirring, enabling the milky white time to be 7-10s, enabling the solution to turn white, rapidly pouring the solution into a container, enabling the solution to be subjected to gas expansion at 20-25 ℃ to form regenerated polyurethane cool foam, aging the regenerated polyurethane foam for 24 hours, and removing the skin to obtain the reinforced regenerated polyurethane foam.
Through adopting above-mentioned technical scheme, through the mode of liquefaction distillation re-foaming, make the abandonment polyurethane foam can obtain good temperature and shock resistance again, make the intensity of polyurethane foam obtain improving after adding modified graphene, strengthened the fire-retardant ability of polyurethane foam simultaneously, make the insulation can safer in transportation and storage process.
Optionally, the catalyst is compounded by 70% of bis (dimethylaminoethyl) ether and 30% of dipropylene glycol by mass.
By adopting the technical scheme, the waste polyurethane foam liquefaction reaction is faster and more thorough by adjusting the proportion of the catalyst.
Optionally, the liquefying agent is a mixed solution of ethylene glycol and polyethylene glycol, and the proportion of the ethylene glycol is 10% -40%.
By adopting the technical scheme, the liquefying effect is enhanced and the liquefying rate is improved by adjusting the proportion of the liquefying agent.
Optionally, the preparation method of the modified graphene comprises the following steps:
and (3) grinding the graphene in a high-energy ball mill for 2-3 hours, washing the graphene to remove acid, adding a dispersing agent, uniformly mixing, standing for 2-3 hours, and airing to obtain the modified graphene.
Through adopting above-mentioned technical scheme, through modifying graphene, make it better disperse in polyurethane foam, make polyurethane foam's mechanical properties and fire-retardant ability obtain improving.
Optionally, a uniform cavity is formed in one side, close to the metal inner container, of the heat preservation wall, and the cavity is in a vacuum state.
By adopting the technical scheme, the vacuum cavity can better promote the heat preservation capability of the heat preservation box.
Optionally, a plurality of heat pipes are evenly arranged at intervals on the outer side of the metal inner container, a phase change cold accumulation plate is arranged at the bottom of the heat preservation wall, one end of each heat pipe is fixedly connected with the metal inner container, and the other end of each heat pipe is fixedly connected with the phase change energy accumulation plate.
Through above-mentioned technical scheme, can be fast with heat conduction to the heat pipe in through the metal inner bag, with heat guide phase transition cold-storage plate by the heat pipe, the phase transition takes place for the phase transition with the heat absorption of phase transition cold-storage plate to make the long ageing low temperature state that keeps in the insulation can, slow down temperature variation, thereby promote the heat preservation ability of insulation can.
Optionally, a layer of wear-resistant rubber pad is adhered to the outer side of the heat preservation wall.
Through above-mentioned technical scheme, prevent to rub each other between the transportation box and cause wearing and tearing to the heat preservation wall, improve the durability of insulation can.
In a second aspect, the present application provides a method for preparing a long-aging cold chain transportation incubator, which adopts the following technical scheme:
the preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, placing reinforced regenerated polyurethane foam into a mould for hot-press molding, wherein the hot-press temperature is 80-100 ℃, and the pressure is 3-5MPa, so as to prepare the heat-insulating wall;
s2, welding heat-conducting pipes around the outer wall of the metal inner container, welding the heat-conducting pipes with the phase-change cold accumulation plate, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container into the heat-insulating wall, filling polyurethane foam adhesive between the edge of an opening of the metal inner container and the heat-insulating wall, bonding the metal inner container and the heat-insulating wall through the polyurethane foam adhesive, forming a uniform cavity between the metal inner container and the heat-insulating wall, and vacuumizing the cavity;
and S4, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Through adopting above-mentioned technical scheme, will strengthen regeneration polyurethane foam through hot compression moulding, the heat preservation wall that this kind of integrated into one piece's technology obtained has better mechanical properties and heat preservation ability, and rethread vacuum cavity, phase transition cold-storage board and heat pipe cooperation further promote the heat preservation ability of insulation can, also have good mechanical properties on the insulation can inner structure.
In summary, the present application has the following beneficial effects:
1. because this application has strengthened insulation can bulk strength through embedding metal inner bag in the heat preservation wall, avoids causing the insulation can to warp the damage in transportation collision in-process, and the heat preservation wall of box is made by strengthening regeneration polyurethane foam, makes the insulation can possess good thermal insulation performance, also possess better intensity and shock resistance, has the effect that improves insulation can mechanical properties.
2. In the application, the waste polyurethane foam can acquire good temperature and impact resistance again by means of liquefying, distilling and re-foaming, the strength of the polyurethane foam is improved after the modified graphene is added, and meanwhile, the flame retardant capability of the polyurethane foam is enhanced, so that the incubator is safer in the transportation and storage processes.
3. According to the method, the reinforced and regenerated polyurethane foam is subjected to hot compression molding, the heat-insulating wall obtained by the integrated molding process has better mechanical property and heat-insulating capability, and the heat-insulating capability of the heat-insulating box is further improved through the cooperation of the vacuum cavity, the phase-change cold accumulation plate and the heat conduction pipe, so that the heat-insulating wall has good mechanical property in the internal structure of the heat-insulating box.
Drawings
FIG. 1 is an exploded view of a long-aging cold chain transport incubator of the present application;
FIG. 2 is a cross-sectional view of a long-aging cold chain transport incubator of the present application.
Description of the drawings: 1. a case; 11. a thermal insulation wall; 12. a metal liner; 13. a cavity; 14. wear-resisting rubber cushion; 2. a case cover; 3. a heat conduction pipe; 4. a phase change cold accumulation plate; 5. and (5) a buckle.
Detailed Description
The present application is described in further detail below with reference to examples.
Preparation example of reinforced regenerated polyurethane foam
Preparation example 1
A preparation method of reinforced regenerated polyurethane foam comprises the following steps:
a1, crushing 500g of waste polyurethane foam into square blocks with the side length of 5mm, putting the square blocks into a hydrothermal kettle, pouring 10g of catalyst and 1000g of liquefying agent, heating to 200 ℃, and reacting for 4 hours;
a2, cooling the reaction kettle to room temperature, separating liquid in the reaction kettle, and distilling at 150 ℃ and 0.07MPa to obtain liquefied polyol;
and A3, adding 0.5g of catalyst, 5g of hard silicone oil, 10g of distilled water and 10g of modified graphene powder into the liquefied polyol obtained in the step A2, uniformly mixing and stirring, adding 1g of isocyanic acid, uniformly mixing under high-speed stirring, quickly pouring the solution into a container until the solution turns white, performing gas expansion at 23 ℃ to form regenerated polyurethane cool foam, aging for 24 hours, and removing the skin to obtain the reinforced regenerated polyurethane foam.
Wherein the catalyst is a mixture of 70% of bis (dimethylaminoethyl) ether and 30% of dipropylene glycol by mass, and the liquefying agent is a mixture of 10% of ethylene glycol and 90% of polyethylene glycol.
Preparation example 2
A preparation method of reinforced regenerated polyurethane foam comprises the following steps:
a1, crushing 500g of waste polyurethane foam into square blocks with the side length of 5mm, putting the square blocks into a hydrothermal kettle, pouring 15g of catalyst and 1500g of liquefying agent, heating to 200 ℃, and reacting for 4 hours;
a2, cooling the reaction kettle to room temperature, separating liquid in the reaction kettle, and distilling at 150 ℃ and 0.07MPa to obtain liquefied polyol;
and A3, adding 0.8g of catalyst, 8g of hard silicone oil, 12g of distilled water and 20g of modified graphene powder into the liquefied polyol obtained in the step A2, uniformly mixing and stirring, adding 2g of isocyanic acid, uniformly mixing under high-speed stirring, quickly pouring the solution into a container until the solution turns white, performing gas expansion at 23 ℃ to form regenerated polyurethane cool foam, aging for 24 hours, and removing the skin to obtain the reinforced regenerated polyurethane foam.
Wherein the catalyst is a mixture of 70% of bis (dimethylaminoethyl) ether and 30% of dipropylene glycol by mass, and the liquefying agent is a mixture of 10% of ethylene glycol and 90% of polyethylene glycol.
Preparation example 3
A preparation method of reinforced regenerated polyurethane foam comprises the following steps:
a1, crushing 500g of waste polyurethane foam into square blocks with the side length of 5mm, putting the square blocks into a hydrothermal kettle, pouring 20g of catalyst and 2000g of liquefier, heating to 200 ℃, and reacting for 4 hours;
a2, cooling the reaction kettle to room temperature, separating liquid in the reaction kettle, and distilling at 150 ℃ and 0.07MPa to obtain liquefied polyol;
a3, adding 1g of catalyst, 10g of hard silicone oil, 15g of distilled water and 30g of modified graphene powder into the liquefied polyol obtained in the step A2, uniformly mixing and stirring, adding 3g of isocyanic acid cool, uniformly mixing under high-speed stirring, quickly pouring the solution into a container until the solution turns white, performing gas expansion at 23 ℃ to form regenerated polyurethane cool foam, aging for 24 hours, and removing the skin to obtain the reinforced regenerated polyurethane foam.
Wherein the catalyst is a mixture of 70% of bis (dimethylaminoethyl) ether and 30% of dipropylene glycol by mass, and the liquefying agent is a mixture of 10% of ethylene glycol and 90% of polyethylene glycol.
Preparation example 4
The preparation method of the reinforced regenerated polyurethane foam is different from the preparation example 2 in that the liquefying agent is a mixed solution of 20% of ethylene glycol and 80% of polyethylene glycol.
Preparation example 5
The preparation method of the reinforced regenerated polyurethane foam is different from the preparation example 2 in that the liquefying agent is a mixed liquid of 30% of ethylene glycol and 70% of polyethylene glycol.
Preparation example 6
The preparation method of the reinforced regenerated polyurethane foam is different from the preparation example 2 in that the liquefying agent is a mixed liquid of 40% of ethylene glycol and 60% of polyethylene glycol.
Preparation example 7
The preparation method of the reinforced regenerated polyurethane foam is different from the preparation example 2 in that modified graphene is not added.
Examples
Example 1
The preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, placing reinforced regenerated polyurethane foam into a mould for hot press molding, wherein the hot press temperature is 80 ℃, and the pressure is 3MPa, so as to prepare the heat preservation wall 11;
s2, welding heat pipes 3 around the outer wall of the metal liner 12, welding the heat pipes 3 with the phase change cold accumulation plate 4, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container 12 into the heat-insulating wall 11, filling polyurethane foam glue between the opening edge of the metal inner container 12 and the heat-insulating wall 11, bonding the metal inner container 12 and the heat-insulating wall 11 through the polyurethane foam glue, forming a uniform cavity 13 between the metal inner container 12 and the heat-insulating wall 11, and then vacuumizing the cavity 13;
and S4, sticking a wear-resistant rubber pad 14 on the outer wall of the heat preservation wall 11, and installing a buckle 5 at the preset position of the outer side of the heat preservation wall 11 and the box cover 2 to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein, the reinforced and regenerated polyurethane foam was prepared in preparation example 1.
Example 2
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 1 is that the hot pressing temperature is 90℃and the pressure is 4MPa.
Example 3
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 1 is that the hot pressing temperature is 100℃and the pressure is 5MPa.
Example 4
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 2 is that the reinforced recycled polyurethane foam was prepared from preparation example 2.
Example 5
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 2 is that the reinforced recycled polyurethane foam was prepared from preparation example 3.
Example 6
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 2 is that the reinforced recycled polyurethane foam was prepared from preparation example 4.
Example 7
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 2 is that the reinforced recycled polyurethane foam was prepared from preparation example 5.
Example 8
The preparation method of the long-aging cold chain transportation incubator comprises the following steps: the difference from example 2 is that the reinforced recycled polyurethane foam was prepared from preparation example 6.
Comparative example
Comparative example 1
The preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, preparing a heat-insulating board from reinforced regenerated polyurethane foam, and bonding the heat-insulating board to form a heat-insulating wall;
s2, welding heat-conducting pipes around the outer wall of the metal inner container, welding the heat-conducting pipes with the phase-change cold accumulation plate, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container into the heat-insulating wall, filling polyurethane foam adhesive between the edge of an opening of the metal inner container and the heat-insulating wall, bonding the metal inner container and the heat-insulating wall through the polyurethane foam adhesive, forming a uniform cavity between the metal inner container and the heat-insulating wall, and vacuumizing the cavity;
and S4, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein, the reinforced and regenerated polyurethane foam was prepared in preparation example 5.
Comparative example 2
The preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, placing reinforced regenerated polyurethane foam into a mould for hot-press molding, wherein the hot-press temperature is 90 ℃, and the pressure is 4MPa, so as to prepare the heat-insulating wall;
s2, welding heat-conducting pipes around the outer wall of the metal inner container, welding the heat-conducting pipes with the phase-change cold accumulation plate, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container into the heat-insulating wall, filling polyurethane foam adhesive between the edge of an opening of the metal inner container and the heat-insulating wall, bonding the metal inner container and the heat-insulating wall through the polyurethane foam adhesive, forming a uniform cavity between the metal inner container and the heat-insulating wall, and vacuumizing the cavity;
and S4, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein, the reinforced and regenerated polyurethane foam was prepared in preparation example 7.
Comparative example 3
The preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, placing reinforced regenerated polyurethane foam into a mould for hot-press molding, wherein the hot-press temperature is 90 ℃, and the pressure is 4MPa, so as to prepare the heat-insulating wall;
s2, placing the metal inner container into the heat-insulating wall, filling polyurethane foam adhesive between the edge of an opening of the metal inner container and the heat-insulating wall, bonding the metal inner container and the heat-insulating wall through the polyurethane foam adhesive, forming a uniform cavity between the metal inner container and the heat-insulating wall, and vacuumizing the cavity;
and S3, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein, the reinforced and regenerated polyurethane foam was prepared in preparation example 5.
Comparative example 4
S1, placing reinforced regenerated polyurethane foam into a mould for hot-press molding, wherein the hot-press temperature is 90 ℃, and the pressure is 4MPa, so as to prepare the heat-insulating wall;
s2, welding heat-conducting pipes around the outer wall of the metal inner container, welding the heat-conducting pipes with the phase-change cold accumulation plate, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container into the heat-insulating wall, filling polyurethane foam glue between the edge of the opening of the metal inner container and the heat-insulating wall, and bonding the metal inner container and the heat-insulating wall through the polyurethane foam glue to form a uniform cavity between the metal inner container and the heat-insulating wall;
and S4, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein, the reinforced and regenerated polyurethane foam was prepared in preparation example 5.
Comparative example 5
The preparation method of the long-aging cold chain transportation incubator comprises the following steps:
s1, putting regenerated polyurethane foam into a mould for hot press molding, wherein the hot press temperature is 90 ℃, and the pressure is 4MPa, so that the heat-insulating wall is prepared;
s2, welding heat-conducting pipes around the outer wall of the metal inner container, welding the heat-conducting pipes with the phase-change cold accumulation plate, cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container into the heat-insulating wall, filling polyurethane foam adhesive between the edge of an opening of the metal inner container and the heat-insulating wall, bonding the metal inner container and the heat-insulating wall through the polyurethane foam adhesive, forming a uniform cavity between the metal inner container and the heat-insulating wall, and vacuumizing the cavity;
and S4, sticking a wear-resistant rubber mat on the outer wall of the heat preservation wall, and installing a buckle at the preset position of the outer side of the heat preservation wall and the box cover to obtain the long-time-effect cold chain transportation heat preservation box.
Wherein the recycled polyurethane foam is commercially available.
Performance test
Test method
A piece of reinforced regenerated polyurethane foam with the thickness of 50mm and 20mm is cut on the prepared heat insulation wall to carry out compression strength test, heat conductivity coefficient measurement and flame retardant property test.
And (3) carrying out a 24-hour heat preservation capability test on the prepared heat preservation box, placing an orange with the pretreatment temperature of 5 ℃ in the heat preservation box, covering a box cover, placing for 24 hours at the room temperature of 25 ℃, and recording the temperature.
Experimental data were counted as follows:
TABLE 1 statistics of experimental data for examples 1-8 and comparative examples 1-4
It can be seen from the combination of example 7 and comparative example 1 and the combination of table 1 that the hot press molding can provide the heat insulation wall with higher compression strength, better mechanical properties in practical use and lower probability of impact damage compared with the conventional bonding method.
It can be seen from the combination of example 7 and comparative example 2 and the combination of table 1 that the addition of modified graphene during the preparation of the reinforced recycled polyurethane foam effectively enhances the compressive strength and flame retardant properties of the recycled polyurethane foam.
As can be seen from the combination of example 7 and comparative example 3 and the combination of table 1, in the 24h insulation test, the temperature of example 7 is lower by 2 ℃ compared with that of comparative example 3, thereby demonstrating that the heat-conducting pipe and the phase change cold accumulation plate can effectively improve the insulation capacity of the insulation box.
As can be seen from the combination of example 7 and comparative example 4 and the combination of table 1, in the 24-hour insulation test, example 7 has a temperature lower by 1.6 ℃ than comparative example 4, thereby demonstrating that the provision of the vacuum chamber can effectively improve the insulation capacity of the incubator.
As can be seen from the combination of example 7 and comparative example 5 and the combination of Table 1, the reinforced recycled polyurethane foam obtained in preparation example 5 has a remarkable improvement in compression strength, heat conductivity coefficient and heat insulation capacity of the heat insulation box compared with the commercial recycled polyurethane foam, and effectively improves the mechanical properties and heat insulation capacity of the heat insulation box prepared from the recycled polyurethane foam.
As can be seen from the combination of examples 1-3 and Table 1, the incubator prepared by the parameters of example 2 is better in heat-insulating property and mechanical property by changing the conditions of hot press molding.
As can be seen from the combination of examples 2 and 4 to 5 and the combination of Table 1, the reinforced regenerated polyurethane foam prepared by adjusting the amount of the additive for preparing the reinforced regenerated polyurethane foam has different properties, and the reinforced regenerated polyurethane foam prepared under the conditions of preparation example 2 has better properties.
It can be seen from the combination of examples 2 and examples 6 to 8 and Table 1 that the reinforced recycled polyurethane foam prepared when the ratio of the liquefying agent is 30% ethylene glycol and 70% polyethylene glycol was mixed by changing the ratio of the liquefying agent has the best performance.
As can be seen in combination with examples 1-8 and in combination with table 1, example 7 is the best mode of the present application.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (5)
1. The long-time-effect cold chain transportation insulation box is characterized by comprising a box body (1) and a box cover (2), wherein the box body (1) is connected with the box cover (2) through a buckle (5), the box body (1) comprises an insulation wall (11) and a metal liner (12), the insulation wall (11) is made of reinforced regenerated polyurethane foam, the box cover (2) is made of reinforced regenerated polyurethane foam, and the insulation wall (11) is bonded with the metal liner (12);
the specific preparation process of the reinforced regenerated polyurethane foam comprises the following steps:
a1, crushing 500g of waste polyurethane foam into blocks with the length of 3-5mm, putting the blocks into a reaction kettle, pouring 10-20g of catalyst and 1000-2000g of liquefying agent, heating to 180-220 ℃, and reacting for 3-5 hours;
a2, cooling the reaction kettle to room temperature, separating out liquid in the reaction kettle, and distilling at 140-160 ℃ and 0.05-0.08MPa to obtain liquefied polyol;
a3, adding 0.5-1g of catalyst, 5-10g of hard silicone oil, 10-15g of distilled water and 10-30g of modified graphene powder into the liquefied polyol obtained in the step A2, uniformly mixing and stirring, adding 1-3g of isocyanic acid cool, uniformly mixing under high-speed stirring, quickly pouring the solution into a container until the solution turns white, generating gas expansion at 20-25 ℃ to form regenerated polyurethane cool foam, aging the regenerated polyurethane cool foam at 24-h, and removing the skin to obtain the reinforced regenerated polyurethane foam;
the catalyst is prepared by compounding 70% of dimethylaminoethyl ether and 30% of dipropylene glycol in percentage by mass;
the liquefying agent is a mixed solution of ethylene glycol and polyethylene glycol, and the proportion of the ethylene glycol is 10% -40%;
the preparation method of the modified graphene comprises the following steps: and (3) grinding the graphene in a high-energy ball mill for 2-3 hours, washing the graphene to remove acid, adding a dispersing agent, uniformly mixing, standing for 2-3 hours, and airing to obtain the modified graphene.
2. The long-term aging cold chain transportation incubator of claim 1, wherein: a uniform cavity (13) is formed in one side, close to the metal inner container (12), of the heat preservation wall (11), and the cavity (13) is in a vacuum state.
3. The long-term aging cold chain transportation incubator of claim 2, wherein: the phase change cold accumulation device is characterized in that a plurality of heat conduction pipes (3) are uniformly arranged at the outer side of the metal inner container (12) at intervals, a phase change cold accumulation plate (4) is arranged at the bottom of the heat preservation wall (11), one end of each heat conduction pipe (3) is fixedly connected with the metal inner container (12), and the other end of each heat conduction pipe is fixedly connected with the phase change cold accumulation plate (4).
4. The long-term aging cold chain transportation incubator of claim 3, wherein: and a layer of wear-resistant rubber pad (14) is adhered to the outer side of the heat preservation wall (11).
5. A method of making a long-term aging cold chain shipping incubator as defined in any one of claims 1 to 4, comprising the steps of:
s1, placing reinforced regenerated polyurethane foam into a mould for hot-press molding, wherein the hot-press temperature is 80-100 ℃, and the pressure is 3-5MPa, so as to prepare the heat-insulating wall (11);
s2, welding heat pipes (3) around the outer wall of the metal liner (12), welding the heat pipes (3) with the phase change cold accumulation plate (4), cleaning redundant welding slag after welding, and polishing regular welding seams;
s3, placing the metal inner container (12) into the heat preservation wall (11), filling polyurethane foam glue between the opening edge of the metal inner container (12) and the heat preservation wall (11), bonding the metal inner container (12) and the heat preservation wall (11) through the polyurethane foam glue, forming a uniform cavity (13) between the metal inner container (12) and the heat preservation wall (11), and vacuumizing the cavity (13);
and S4, sticking a wear-resistant rubber pad (14) on the outer wall of the heat preservation wall (11), and installing a buckle (5) at the preset position of the outer side of the heat preservation wall (11) and the box cover (2) to obtain the long-time-effect cold chain transportation heat preservation box.
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| CN116835147A (en) | 2023-10-03 |
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