CN218804547U - Polyurethane sandwich plate for constant temperature box - Google Patents
Polyurethane sandwich plate for constant temperature box Download PDFInfo
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- CN218804547U CN218804547U CN202223003593.6U CN202223003593U CN218804547U CN 218804547 U CN218804547 U CN 218804547U CN 202223003593 U CN202223003593 U CN 202223003593U CN 218804547 U CN218804547 U CN 218804547U
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Abstract
The utility model discloses a polyurethane sandwich panel for a thermostat, which is formed by compounding three layers of structures, wherein the upper layer is made of paper-plastic composite material, the middle layer is made of polyurethane rigid foam, and the lower layer is made of paper-plastic composite material; the paper-plastic composite material is formed by compounding a 10-20 mu m polyethylene film, 100-110 mu m kraft paper, 5-10 mu m aluminum foil and a 10-20 mu m polyethylene film from top to bottom; the polyurethane rigid foam and the paper-plastic composite material are compounded and molded through one-step foaming; the polyurethane rigid foam is bonded with a bottom polyethylene film of the paper-plastic composite material; the thickness of the middle layer is 20-100 mm. The utility model provides a keep warm and waterproof dual requirement, polyurethane sandwich panel thermal-insulated thermal insulation performance is good, effectively reduces the temperature drift scope, ensures the safety of food or medicine.
Description
Technical Field
The utility model belongs to waterproof insulation material field, concretely relates to polyurethane sandwich panel for thermostated container.
Background
The incubator has great propelling effect on the development of biology, agriculture and fishery. However, nowadays with developed logistics, the packaging box still has a lot of defects in the transportation process, and for the articles needing constant-temperature transportation, the heat preservation effect is poor, the temperature is suddenly high and suddenly low, and the damage of the contents is very easy to cause; in the long-distance transportation process, the probability that the box body is blown by wind and drenched by rain is higher, water vapor enters and attacks the box body heat preservation structure layer, and the heat insulation effect of the packing box is reduced.
The traditional constant temperature box on the market at present only focuses on the heat insulation of the structure and materials of the box body. However, in the application of the incubator and the incubator, not only heat insulation but also waterproof performance are important factors to be considered. The accuracy of the temperature of the constant temperature box and the range of temperature drift can be directly influenced by the quality of the waterproof performance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a polyurethane sandwich panel for thermostated container, solve heat preservation and waterproof dual requirement. The utility model discloses a polyurethane sandwich panel thermal-insulated thermal insulation performance is excellent, effectively reduces the temperature drift scope, ensures the safety of food or medicine.
The utility model adopts the technical proposal that:
a polyurethane sandwich board for a thermostat is formed by compounding three layers of structures, wherein the upper layer is made of a paper-plastic composite material, the middle layer is made of polyurethane rigid foam, and the lower layer is made of a paper-plastic composite material; the paper-plastic composite material is formed by compounding a 10-20 mu m polyethylene film, 100-110 mu m kraft paper, 5-10 mu m aluminum foil and a 10-20 mu m polyethylene film from top to bottom; the polyurethane rigid foam and the paper-plastic composite material are compounded and molded through one-step foaming; the polyurethane rigid foam is bonded with a bottom polyethylene film of the paper-plastic composite material; the thickness of the middle layer is 20-100 mm.
The paper-plastic composite material is from top to bottom, the first polyethylene film layer plays a water stopping role, and the surface cleaning is facilitated; kraft paper with the thickness of 100-110 mu m provides rigidity and protects polyurethane rigid foam; the aluminum foil is a moisture-proof barrier; the lowest polyethylene film is bonded with the polyurethane rigid foam.
The polyethylene film is formed on one surface of kraft paper and one surface of an aluminum foil respectively by adopting a film laminating process, and the other surface of the kraft paper is compounded with the other surface of the aluminum foil by using an adhesive in a dry method.
The adhesive is acrylate or vinyl acetate copolymer emulsion adhesive. The kraft paper and the aluminum foil are guaranteed to have good adhesion, and the phenomenon that the waterproof and heat-insulating performance of the product is affected due to structural layering of the paper-plastic composite material when the product is produced and applied is avoided.
The density of the polyurethane rigid foam is 30-42 kg/m 3 . The requirement of cold chain transportation on controlling the whole weight is met.
The heat conductivity coefficient of the polyurethane sandwich plate is not more than 23mW/m.K. The requirements of the constant-temperature packaging box on heat insulation and heat preservation performance are met, and the safety of food or medicines is guaranteed.
To sum up, the utility model discloses the beneficial effect who reaches is:
(1) The utility model discloses a polyurethane sandwich panel has improved waterproof gas barrier performance, and when contact steam, the paper of upper and lower floor moulds combined material and can exert the separation effect, and steam and middle level polyurethane rigid foam contactless, the thermal-insulated thermal insulation performance of foam keep good.
(2) The utility model discloses a polyurethane sandwich panel coefficient of heat conductivity is low, and the long-term decay slows down moreover, is applied to the thermostated container, and thermal-insulated thermal insulation performance is good, can effectively reduce the temperature drift scope, ensures the safety of food or medicine for a long time.
Drawings
Fig. 1 is a schematic structural view of a polyurethane sandwich panel for an incubator according to the present invention;
fig. 2 is a schematic structural diagram of the paper-plastic composite material of the present invention.
Wherein, 1-upper layer, 2-middle layer, 3-lower layer, 11-polyethylene film, 12-kraft paper, 13-aluminum foil, 14-polyethylene film.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and accompanying fig. 1 and 2.
A polyurethane sandwich board for a constant temperature box as shown in figure 1 is formed by compounding three layers of structures, wherein the upper layer 1 is made of a paper-plastic composite material, the middle layer 2 is made of polyurethane rigid foam, and the lower layer 3 is made of a paper-plastic composite material. The density of the polyurethane rigid foam is 30-42 kg/m 3 (ii) a The thickness of the middle layer is 20-100 mm.
The polyurethane rigid foam and the paper-plastic composite material are compounded and molded through one-step foaming.
A paper-plastic composite material as shown in figure 2 is compounded by a 10-20 μm polyethylene film 11, a 100-110 μm kraft paper 12, a 5-10 μm aluminum foil 13 and a 10-20 μm polyethylene film 14 from top to bottom; the polyurethane rigid foam is bonded with the bottom polyethylene film of the paper-plastic composite material.
The polyethylene film is formed on one side of kraft paper by adopting a film laminating process, and then the polyethylene film with the thickness of 10-20 mu m is generated on one side of the aluminum foil by adopting the film laminating process, and the specific operation is as follows: respectively coating the molten PE resin material on kraft paper and an aluminum foil in a casting manner, and quickly pressing, cooling and forming.
And finally, compounding kraft paper and aluminum foil by adopting an acrylate or vinyl acetate copolymer emulsion adhesive dry method, wherein the specific operation is as follows: and (3) coating a layer of acrylate adhesive on the other surface of the aluminum foil by using a mesh wire roller, removing the solvent, drying, performing hot-pressing compounding on the other surface of the kraft paper, and performing curing molding.
The thermal conductivity coefficient of the polyurethane sandwich plate is not more than 23mW/m.K. The heat insulation performance requirement of the constant-temperature packaging box is met, and the safety of food or medicines is guaranteed.
It should be noted that the present invention is not limited to the above-mentioned embodiments, and the above-mentioned preferred embodiments are only used for illustrating and explaining the present invention, and are not used for limiting the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or adopts prior art to realize.
Claims (5)
1. A polyurethane sandwich board for a thermostat is characterized in that the board is formed by compounding three layers of structures, wherein the upper layer is made of a paper-plastic composite material, the middle layer is made of polyurethane rigid foam, and the lower layer is made of a paper-plastic composite material; the paper-plastic composite material is formed by compounding a 10-20 mu m polyethylene film, 100-110 mu m kraft paper, 5-10 mu m aluminum foil and a 10-20 mu m polyethylene film from top to bottom; the polyurethane rigid foam and the paper-plastic composite material are formed by one-step foaming and compounding; the polyurethane rigid foam is bonded with a bottom polyethylene film of the paper-plastic composite material; the thickness of the middle layer is 20-100 mm.
2. The polyurethane sandwich board for the incubator according to claim 1, wherein the polyethylene film is respectively formed on one surface of kraft paper and one surface of the aluminum foil by a film laminating process, and the other surface of the kraft paper is dry-compounded with the other surface of the aluminum foil by using an adhesive.
3. The polyurethane sandwich panel for an incubator according to claim 2, wherein the adhesive is an acrylate or vinyl acetate copolymer emulsion adhesive.
4. The polyurethane sandwich panel for an incubator according to claim 1, wherein the density of the polyurethane rigid foam is 30 to 42kg/m 3 。
5. The polyurethane sandwich panel for an incubator according to claim 1, wherein the thermal conductivity of the polyurethane sandwich panel is not more than 23mW/m.k.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223003593.6U CN218804547U (en) | 2022-11-11 | 2022-11-11 | Polyurethane sandwich plate for constant temperature box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223003593.6U CN218804547U (en) | 2022-11-11 | 2022-11-11 | Polyurethane sandwich plate for constant temperature box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218804547U true CN218804547U (en) | 2023-04-07 |
Family
ID=87042754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223003593.6U Active CN218804547U (en) | 2022-11-11 | 2022-11-11 | Polyurethane sandwich plate for constant temperature box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218804547U (en) |
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2022
- 2022-11-11 CN CN202223003593.6U patent/CN218804547U/en active Active
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