CN114673320A - High-strength polyurethane composite cushion block and production process thereof - Google Patents
High-strength polyurethane composite cushion block and production process thereof Download PDFInfo
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- CN114673320A CN114673320A CN202111601110.XA CN202111601110A CN114673320A CN 114673320 A CN114673320 A CN 114673320A CN 202111601110 A CN202111601110 A CN 202111601110A CN 114673320 A CN114673320 A CN 114673320A
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 152
- 239000004814 polyurethane Substances 0.000 title claims abstract description 152
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 46
- 239000006260 foam Substances 0.000 claims abstract description 37
- 239000004964 aerogel Substances 0.000 claims abstract description 34
- 239000012774 insulation material Substances 0.000 claims abstract description 23
- 238000012856 packing Methods 0.000 claims abstract description 7
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000011496 polyurethane foam Substances 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 4
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- 125000006850 spacer group Chemical group 0.000 claims 5
- 239000000463 material Substances 0.000 abstract description 9
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 abstract description 4
- 238000004080 punching Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004619 high density foam Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
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- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229920005862 polyol Polymers 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
- E04F15/102—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of fibrous or chipped materials, e.g. bonded with synthetic resins
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/181—Insulating layers integrally formed with the flooring or the flooring elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Thermal Insulation (AREA)
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Abstract
The invention relates to a high-strength polyurethane composite cushion block and a production process thereof, which are particularly suitable for heat insulation between a vertical column and a concrete ground in a refrigeration house and a ski field and belong to the technical field of polyurethane composite cushion blocks. Include the sticky cushion body that constitutes in proper order by a plurality of polyurethane pultrusion section bar pieces, polyurethane pultrusion section bar piece is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar piece, insulation material is vacuum insulation panels, the aerogel, the position packing that punches of cushion body has the aerogel, vacuum insulation panels is filled to the cavity, polyurethane rigid foam has been pour to cushion body outside, polyurethane pultrusion section bar, vacuum insulation panels, the aerogel, the cross sectional area ratio of polyurethane rigid foam is: (4-23): (94-74): (1-5): (1-2). The invention has high strength, low heat conductivity coefficient and high production efficiency of products, and can produce columnar structure materials with larger thickness.
Description
Technical Field
The invention relates to a high-strength polyurethane composite cushion block and a production process thereof, which are particularly suitable for heat insulation between a vertical column and a concrete ground in a refrigeration house and a ski field and belong to the technical field of polyurethane composite cushion blocks.
Background
The steel structure freezer is most likely not to attach importance to the column bottom cold bridge phenomenon, and the steel structure column is direct to be connected fixedly with concrete structure, leads to air conditioning to transmit the concrete through the steel structure column and transmits ground again, takes place to run cold, and the demand of energy-conservation is not adapted.
At present, some refrigerators are made of rigid polyurethane to form heat-insulating cushion blocks so as to reduce energy consumption and solve the problem of cold leakage of the refrigerators to a certain extent.
E.g. a foreign company
The polyurethane pad reference indexes are as follows:
| item | Numerical value | Test standard |
| Density/(kg. m3) | ≥500 | ASTM D5140 |
| Compressive Strength (2% deformation)/MPa | 7.0 | ASTM D1621 |
| Compressive Strength (10% deformation)/MPa | 30.0 | ASTM D1621 |
| Thermal conductivity (20 ℃ C.)/(w/m.K) | 0.075 | ASTM C177 |
| Thermal conductivity (-160 ℃ C.)/(w/m.K) | 0.051 | ASTM C177 |
| Coefficient of thermal expansion/K-1 | 58.7×10-6 | ASTM D696 |
| Tensile strength/MPa | 6.1 | ASTM D1623 |
The reference indexes of column base cushion block heat preservation and compressive strength index requirements in the design of a refrigeration house by a certain design institute in China are as follows:
CN111349206A discloses a high-strength polyurethane heat-insulating cushion block bi-component raw material for a refrigeration house and a preparation method thereof, wherein an isocyanate component and a polyol component are fully mixed under the pressure of more than or equal to 25MPa, and then are overfilled and poured into a steel mould according to the pressure of more than 5 times, the temperature of the mould is controlled at 40-50 ℃, the pressure is maintained for 2h, and the mould is opened to obtain the heat-insulating cushion block, wherein the lowest heat conductivity coefficient of the polyurethane cushion block reaches (20 ℃) 0.06W/(m.k).
For rigid polyurethane foams, the thermal insulation performance depends mainly on the material density, the closed cell structure and the thermal conductivity of the gas filled in the cells, and the main thermal conduction mode of rigid polyurethane foams depends on the thermal conduction of gas and the thermal conduction of solid, wherein the influence of the thermal conduction of gas in a large volume proportion is the largest. This results in a higher strength, higher density, higher thermal conductivity and poorer insulation of the high density, high strength rigid foam.
This is also the reason why the thermal conductivity of the rigid polyurethane foam is required to be 0.024(20 ℃) W/(mK) (GB50404-2017 rigid foam polyurethane thermal insulation and waterproofing engineering specification), and the general requirement index of the polyurethane cushion block is 0.075(20 ℃) W/(mK). The heat conductivity and the compressive strength of the polyurethane rigid foam cushion block are contradictory indexes.
Therefore, a thermal insulation cushion block which can achieve low thermal conductivity and ensure high strength and a preparation method thereof are urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the high-strength polyurethane composite cushion block with high strength, low thermal conductivity and high production efficiency and the production process thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a high strength polyurethane composite cushion block, its special character lies in including the sticky cushion body that constitutes in proper order by a plurality of height the same polyurethane pultrusion section bar pieces 1, polyurethane pultrusion section bar pieces 1 are the cavity inner chamber of opening from top to bottom, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar pieces 1, insulation material includes two kinds, one kind is vacuum insulation panels 3, another kind is aerogel 2, the position packing that punches of cushion body has aerogel 2, all the other cavities fill vacuum insulation panels 3, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar 1, vacuum insulation panels 3, aerogel 2, the cross sectional area ratio of the four hard foam of polyurethane is for: (4-23): (94-74): (1-5): (1-2).
Preferably, polyurethane rigid foam is poured outside the cushion block body, and specifically, all gaps on six sides of the cushion block body are filled and sealed by pouring the polyurethane rigid foam in a mold during production;
preferably, the heat conductivity coefficient of the high-strength polyurethane composite cushion block is less than or equal to 0.019W/(m.k) (20 ℃) under the condition that the compressive strength (10% deformation) is more than or equal to 30 MPa;
Preferably, the compressive strength (10% deformation) of the high-strength polyurethane composite cushion block is more than or equal to 190MPa under the condition that the thermal conductivity coefficient is less than or equal to 0.075W/(m.k) (20 ℃).
A production process of a high-strength polyurethane composite cushion block is characterized by comprising the following steps:
1. cutting a square or rectangular hollow polyurethane pultruded profile with the side length of 50-200 mm of the cross section into a plurality of polyurethane pultruded profile blocks 1 with the same height according to the designed thickness of a composite cushion block finished product, longitudinally arranging the plurality of polyurethane pultruded profile blocks 1 (the length direction of a fiber is the thickness direction), and mutually gluing the plurality of polyurethane pultruded profile blocks 1 to form a cushion block body;
2. the hollow inner cavity of each polyurethane pultrusion section bar block 1 is filled with heat insulation materials, and the method specifically comprises the following steps: the punched part is filled with aerogel 2, and other parts are filled with vacuum insulation panels 3 to form a cushion block body filled with insulation materials;
3. and (3) placing the cushion block body filled with the heat insulation material into a mold designed according to the size of a finished product, pouring polyurethane rigid foam by using a polyurethane casting machine, closing the mold, filling all gaps on six surfaces of the cushion block body with the polyurethane rigid foam, and then demolding to obtain the high-strength polyurethane composite cushion block.
Preferably, the polyurethane pultrusion profile is a polyurethane pultrusion profile processed by a composite material with the brand number of W650H produced by Wanhua chemical (Beijing) Co., Ltd, the compression strength (longitudinal direction) of a finished product is more than or equal to 860mPa, the tensile strength of the finished product is more than or equal to 830mPa, and the thermal conductivity is about 0.3W/(m.K). (design and construction of passive type ultra-low energy consumption green building external door and window without heat bridge.) door and window.Zhou Pejie.2016(11)；11-1)。
Preferably, the thermal conductivity of the vacuum insulation panel 3 is 0.004W/(m.K) to 0.008W/(m.K); (STP vacuum insulation panel building exterior wall external thermal insulation system application technique, Zhao run Li, thermal insulation material and energy-saving technique, 2021 (31-34));
preferably, the thermal conductivity of the vacuum insulation panel 3 is 0.006W/(m.k);
preferably, the thermal conductivity of the aerogel 2 is 0.014-0.016W/(m.K); (problems and prospects of SiO2 aerogel in application of energy-saving new materials; Wangchong Limingjun. (building material development guide; 2019 (23); 1-2)).
Preferably, the thermal conductivity of the polyurethane rigid foam is 0.075(20 ℃) W/(m.K), the compressive strength is more than or equal to 30mPa, and the tensile strength of a finished product is more than or equal to 6.1 mPa.
The high-strength polyurethane composite cushion block disclosed by the invention has the following beneficial effects:
1. high compressive strength and low thermal conductivity
Under the condition that the compressive strength (10% deformation) is more than or equal to 30MPa, the heat conductivity coefficient of the high-strength polyurethane composite cushion block is less than or equal to 0.019W/m.k (20 ℃), and the heat preservation effect is 3.95 times that of the heat conductivity coefficient of the current normal cushion block which is less than or equal to 0.075W/m.k (20 ℃); or under the condition that the thermal conductivity coefficient is less than or equal to 0.075W/m.k (20 ℃), the compressive strength (10% deformation) is more than or equal to 190MPa, which is 6.33 times of the compressive strength (10% deformation) of the current normal cushion block is more than or equal to 30 MPa.
2. High production efficiency
The production efficiency of the high-strength polyurethane composite cushion block is improved by dozens of times or even hundreds of times. Since the curing of rigid polyurethane foams is an exothermic reaction, the greater the density of the article, the more concentrated the heat, and the internal temperature of the high density foam may exceed 200 ℃ after curing. Meanwhile, because the polyurethane rigid foam plastic is a good heat insulation material, the internal heat is difficult to release in a short time. Rigid polyurethane foams are composed of a myriad of closed cells that contain insulating gas at high internal temperatures. This results in that the product will stay still for several hours or tens of hours after being solidified in the mold, and the mold can be opened to take out the product after the pressure inside the closed cells becomes small after the heat of the product is released. Otherwise, the pressure in the closed cell can cause the finished product to expand at the moment of opening the die, and the interior of the closed cell cracks seriously to report waste. The rigid polyurethane foam in the high-strength polyurethane composite cushion block is an adhesive, sealing and heat-insulating material in the cushion block product, the proportion of the rigid polyurethane foam in the cross section area of the cushion block is 1-2%, the heat release during curing can be almost ignored, and after all gaps on six surfaces of the product are filled and cured, the product is demoulded to obtain the high-strength low-heat-conductivity polyurethane composite cushion block. The demolding time can be less than or equal to 5min, compared with the prior process that a finished product is stood for several hours or dozens of hours after being solidified in a mold, the production efficiency is dozens of times or even hundreds of times of that of the prior polyurethane rigid foam plastic cushion block, and a large amount of production time or mold quantity can be saved.
3. Can produce high-strength polyurethane composite cushion block with larger thickness
The thickness or height of the high-strength polyurethane composite cushion block can be determined according to the cutting length of the polyurethane pultrusion profile, and a columnar structure material with the thickness or height more than or equal to 10m can be produced. Also, since the curing of polyurethane rigid foams is an exothermic reaction, the greater the density of the article, the more concentrated the heat, and the internal temperature of the high density foam may exceed 200 ℃ after curing. Meanwhile, because the rigid polyurethane foam is a good heat-insulating material, the internal heat is difficult to release in a short time, the thickness or height of the conventional rigid polyurethane foam cushion block is difficult to exceed 200mm, if the thickness or height exceeds 200mm, the internal large heat is difficult to release, the finished product rate of products is lower, and the internal yellowing of the foam or even spontaneous combustion can be directly caused by overhigh temperature. The thickness or height of the polyurethane composite cushion block with high strength and low heat conductivity coefficient can be determined according to the cutting length of the polyurethane pultruded profile, is theoretically unlimited, and can produce columnar structural materials with the thickness or height more than or equal to 10 m.
Drawings
FIG. 1 is a schematic structural diagram of a high-strength polyurethane composite mat according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The high-strength polyurethane composite cushion block of the embodiment is shown in the attached drawing 1, and comprises a cushion block body formed by sequentially gluing a plurality of polyurethane pultrusion section blocks 1 with the same height, wherein each polyurethane pultrusion section block 1 is a hollow inner cavity with an upper opening and a lower opening, the shape of the polyurethane pultrusion section block is cuboid or cube, the hollow inner cavity of each polyurethane pultrusion section block 1 is filled with two heat insulation materials, one is a vacuum heat insulation plate 3, the other is aerogel 2, a punching part of the cushion block body is filled with aerogel 2, the other cavities are filled with vacuum heat insulation plates 3, the upper end and the lower end of the punching part are plugged by polyurethane plates, polyurethane hard foam is poured outside the cushion block body, the polyurethane pultrusion sections 1, the vacuum heat insulation plates 3, the aerogel 2 and the polyurethane hard foam (the polyurethane hard foam of the embodiment and the following embodiments 2-5 is also called as a high-strength polyurethane heat insulation cushion block raw material for a refrigeration house, the method comprises the following specific steps: patent application No. 202010290787.5, publication No. CN111349206A, patent name a high-strength polyurethane insulation pad bi-component raw material for a refrigerator and a high-strength polyurethane insulation pad bi-component raw material for a refrigerator disclosed by the preparation method) has a cross-sectional area ratio of 4: 94: 1: 1. the table of the performance parameters of the above four substances is shown in table 1. The performance parameters of the high strength polyurethane composite mat of this example are shown in table 1.
Table 1: the performance parameter tables of the polyurethane pultruded profiles, vacuum insulation panels, aerogels, polyurethane rigid foams of the present examples
Table 2: performance parameter table of the high-strength polyurethane composite cushion block of the embodiment
Example 2
The compound cushion of high strength polyurethane of this embodiment, refer to figure 1, include the cushion body that comprises sticky the constitution in proper order of a plurality of highly the same polyurethane pultrusion section bar pieces 1, polyurethane pultrusion section bar piece 1 is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar piece 1, insulation material includes two kinds, one kind is vacuum insulation panels 3, another kind is aerogel 2, the position packing that punches of cushion body has aerogel 2, all the other cavities fill vacuum insulation panels 3, the polyurethane board shutoff is passed through at both ends about the position of punching, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar 1, vacuum insulation panels 3, aerogel 2, the cross sectional area ratio of four of the hard foam of polyurethane is 23: 74: 1: 2. the table of the performance parameters for the four materials is shown in Table 3. The performance parameters of the high strength polyurethane composite blocks of this example are shown in Table 4
Table 3: the performance parameter tables of the polyurethane pultruded profiles, vacuum insulation panels, aerogels, polyurethane rigid foams of the present examples
Table 4: performance parameter table of the high-strength polyurethane composite cushion block of the embodiment
| Finished product compressive strength mPa | Tensile strength of finished product mPa | Finished product thermal conductivity W/(m.K) (20 ℃ C.) |
| 197.8 | 190.9 | 0.07509 |
Example 3
The compound cushion of high strength polyurethane of this embodiment, refer to figure 1, include the cushion body that comprises sticky the constitution in proper order by a plurality of highly the same polyurethane pultrusion section bar pieces 1, polyurethane pultrusion section bar piece 1 is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar piece 1, insulation material includes two kinds, one kind is vacuum insulation panels 3, another kind is aerogel 2, the position packing that punches of cushion body has aerogel 2, all the other cavities fill vacuum insulation panels 3, the polyurethane board shutoff is passed through at both ends about the position of punching, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar 1, vacuum insulation panels 3, aerogel 2, the cross sectional area ratio of the four of the hard foam of polyurethane is 10: 84: 4: 2. the table of the performance parameters for the four materials is shown in Table 5. The performance parameters of the high strength polyurethane composite blocks of this example are shown in table 6.
Table 5: the performance parameter tables of the polyurethane pultruded profiles, vacuum insulation panels, aerogels, polyurethane rigid foams of the present examples
Table 6: performance parameter table of the high-strength polyurethane composite cushion block of the embodiment
| Finished product compressive strength mPa | Tensile Strength mpa of the finished product | Finished product thermal conductivity W/(m.K) (20 ℃ C.) |
| 86 | 83 | 0.03714 |
Example 4
The compound cushion of high strength polyurethane of this embodiment, refer to figure 1, include the cushion body that comprises sticky the constitution in proper order of a plurality of highly the same polyurethane pultrusion section bar pieces 1, polyurethane pultrusion section bar piece 1 is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar piece 1, insulation material includes two kinds, one kind is vacuum insulation panels 3, another kind is aerogel 2, the position packing that punches of cushion body has aerogel 2, all the other cavities fill vacuum insulation panels 3, the polyurethane board shutoff is passed through at both ends about the position of punching, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar 1, vacuum insulation panels 3, aerogel 2, the cross sectional area ratio of the four of the hard foam of polyurethane is 5: 90: 3: 2. the table of the performance parameters for the four materials is shown in Table 7. The performance parameters of the high strength polyurethane composite blocks of this example are shown in Table 8.
Table 7: the performance parameter tables of the polyurethane pultruded profiles, vacuum insulation panels, aerogels, polyurethane rigid foams of the present examples
Table 8: performance parameter table of the high-strength polyurethane composite cushion block of the embodiment
| Finished product compressive strength mPa | Tensile Strength mpa of the finished product | Finished product thermal conductivity W/(m.K) (20 ℃ C.) |
| 43 | 41.5 | 0.02235 |
Example 5
The compound cushion of high strength polyurethane of this embodiment, refer to figure 1, include the cushion body that comprises sticky the constitution in proper order by a plurality of highly the same polyurethane pultrusion section bar pieces 1, polyurethane pultrusion section bar piece 1 is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar piece 1, insulation material includes two kinds, one kind is vacuum insulation panels 3, another kind is aerogel 2, the position packing that punches of cushion body has aerogel 2, all the other cavities fill vacuum insulation panels 3, the polyurethane board shutoff is passed through at both ends about the position of punching, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar 1, vacuum insulation panels 3, aerogel 2, the cross sectional area ratio of the four of the hard foam of polyurethane is 4: 92: 2: 2. the table of the performance parameters for the four materials is shown in Table 9. The performance parameters of the high strength polyurethane composite blocks of this example are shown in Table 10.
Table 9: the performance parameter tables of the polyurethane pultruded profiles, vacuum insulation panels, aerogels, polyurethane rigid foams of the present examples
Table 10: performance parameter table of the high-strength polyurethane composite cushion block of the embodiment
| Finished product compressive strength mPa | Tensile Strength mpa of the finished product | Finished product thermal conductivity W/(m.K) |
| 34.4 | 33.2 | 0.01932 |
Finally, it should be noted that the above detailed description of the embodiments of the present invention patent, but the present invention patent is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims.
Claims (10)
1. The utility model provides a compound cushion of high strength polyurethane, its characterized in that includes the cushion body that comprises a plurality of highly the same polyurethane pultrusion section bars gluing in proper order, polyurethane pultrusion section bar is upper and lower open cavity inner chamber, the shape is cuboid or square, it has insulation material to fill in the cavity inner chamber of polyurethane pultrusion section bar, insulation material is two kinds, one kind is vacuum insulation panels, another kind is the aerogel, the position packing that punches of cushion body has the aerogel, all the other cavities fill vacuum insulation panels, the hard foam of polyurethane has been pour to cushion body outside, polyurethane pultrusion section bar, vacuum insulation panels, the aerogel, the cross sectional area ratio of the four hard foam of polyurethane is: (4-23): (94-74): (1-5): (1-2).
2. The high-strength polyurethane composite spacer as claimed in claim 1, wherein the rigid polyurethane foam is poured outside the spacer body, and all gaps on six sides of the spacer body are filled and sealed by pouring the rigid polyurethane foam in a mold during production.
3. The high-strength polyurethane composite cushion block as claimed in claim 1, wherein the high-strength polyurethane composite cushion block has a thermal conductivity of 0.019W/m.k or less when the compressive strength is greater than or equal to 30 MPa.
4. The high-strength polyurethane composite cushion block as claimed in claim 1, wherein the compressive strength of the high-strength polyurethane composite cushion block is greater than or equal to 190MPa under the condition that the thermal conductivity coefficient is less than or equal to 0.075W/m.k.
5. A process for producing a high strength polyurethane composite spacer according to any one of claims 1 to 4, comprising the steps of:
1) cutting a square or rectangular hollow polyurethane pultrusion profile with the side length of 50-200 mm of the cross section into a plurality of polyurethane pultrusion profile blocks with the same height according to the design thickness of a composite cushion block finished product, longitudinally arranging the plurality of polyurethane pultrusion profile blocks, and mutually gluing the plurality of polyurethane pultrusion profile blocks to form a cushion block body;
2) The hollow inner cavity of each polyurethane pultrusion section bar block is filled with heat insulation materials, and the method specifically comprises the following steps: the punched part is filled with aerogel, and other parts are filled with vacuum insulation panels to form a cushion block body filled with insulation materials;
3) and (3) placing the cushion block body filled with the heat insulation material into a mold designed according to the size of a finished product, pouring polyurethane rigid foam by using a polyurethane casting machine, closing the mold, filling all gaps on six surfaces of the cushion block body with the polyurethane rigid foam, and then demolding to obtain the high-strength polyurethane composite cushion block.
6. The process for producing a high-strength polyurethane composite cushion block according to claim 5, wherein the compression strength (longitudinal direction) of the polyurethane pultruded profile is not less than 860mPa, the tensile strength of the finished product is not less than 830mPa, and the thermal conductivity is about 0.3W/(m.K).
7. The production process of the high-strength polyurethane composite cushion block according to claim 5, wherein the thermal conductivity of the vacuum insulation panel is 0.004W/(m.K) -0.008W/(m.K).
8. The process for producing a high-strength polyurethane composite spacer according to claim 7, wherein the thermal conductivity of the vacuum insulation panel is 0.006W/(m.K).
9. The process for producing a high-strength polyurethane composite mat according to claim 5, wherein said aerogel has a thermal conductivity of 0.014 to 0.016W/(m.K).
10. The process for producing a high-strength polyurethane composite cushion block according to claim 5, wherein the polyurethane rigid foam has a thermal conductivity of 0.075W/(m.K), a compressive strength of 30mPa or more, and a tensile strength of 6.1mPa or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111601110.XA CN114673320A (en) | 2021-12-24 | 2021-12-24 | High-strength polyurethane composite cushion block and production process thereof |
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|---|---|---|---|---|
| CN202500228U (en) * | 2011-12-30 | 2012-10-24 | 上海市机电设计研究院有限公司 | Steel structure outsourced cold storage pedestal insulation block |
| CN109057062A (en) * | 2018-09-28 | 2018-12-21 | 大连美宸特环保节能产品有限公司 | A kind of vapor barrier layer construction method of freezer |
| CN111349206A (en) * | 2020-04-14 | 2020-06-30 | 万华节能科技(烟台)有限公司 | High-strength polyurethane heat-insulation cushion block bi-component raw material for refrigeration house and preparation method thereof |
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2021
- 2021-12-24 CN CN202111601110.XA patent/CN114673320A/en active Pending
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| CN202500228U (en) * | 2011-12-30 | 2012-10-24 | 上海市机电设计研究院有限公司 | Steel structure outsourced cold storage pedestal insulation block |
| CN109057062A (en) * | 2018-09-28 | 2018-12-21 | 大连美宸特环保节能产品有限公司 | A kind of vapor barrier layer construction method of freezer |
| CN111349206A (en) * | 2020-04-14 | 2020-06-30 | 万华节能科技(烟台)有限公司 | High-strength polyurethane heat-insulation cushion block bi-component raw material for refrigeration house and preparation method thereof |
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