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High quality polyurethane foaming system for refrigerators and refrigerator based on the same

A rigid polyurethane and polyurethane technology is applied in the field of thermal insulation of low-temperature storage equipment, which can solve the problems such as the inability to meet the technical requirements of thin-walled products, the deterioration of thermal insulation performance of the foam layer, and the insufficient flow of foam raw materials, so as to avoid fire hazards. , Improve thermal insulation performance, good thermal insulation performance

Inactive Publication Date: 2017-09-15
CHANGHONG MEILING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process of refrigerator thin-walled products, due to the thinning of the refrigerator wall, the thermal insulation performance and mechanical strength of the foam layer are deteriorated, and the flow of foaming raw materials at the corners with complex structures is insufficient, resulting in false filling.
At present, the cyclopentane foaming system widely used in refrigerators cannot meet the technical requirements of thin-walled products. Therefore, it is imperative to develop a foaming system with high fluidity, high heat retention and high strength.

Method used

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  • High quality polyurethane foaming system for refrigerators and refrigerator based on the same
  • High quality polyurethane foaming system for refrigerators and refrigerator based on the same
  • High quality polyurethane foaming system for refrigerators and refrigerator based on the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition of each raw material of the polyurethane foaming system of the present embodiment by mass parts is:

[0029]

[0030] Utilize the polyurethane foaming system of present embodiment, the step of making the insulation rigid polyurethane foam in the refrigerator cabinet is as follows:

[0031] 1) Under the condition of the material temperature of 20°C, mix the combined polyether, physical foaming agent HFC-245fa and foaming aid according to the ratio to obtain the mixed white material;

[0032] 2) Under the condition of the material temperature of 20°C, put the isocyanate into the premixing tank and stir evenly to obtain the black material;

[0033] 3) Under the condition of the material temperature of 20°C, mix the black material and the mixed white material according to the ratio through a high-pressure foaming machine, and quickly inject them into the refrigerator box to be foamed;

[0034] 4) The mold temperature of the refrigerator box to be foamed ...

Embodiment 2

[0037] The composition of each raw material of the polyurethane foaming system of the present embodiment by mass parts is:

[0038]

[0039] Utilizing the polyurethane foaming formula of this embodiment, the method for manufacturing the heat-insulating rigid polyurethane foam in the refrigerator cabinet is the same as that of Example 1.

[0040] After the foam box was cooled to room temperature, the rigid polyurethane foam in the box was taken out, and its related properties were tested. The results are shown in Table 1.

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Abstract

The invention discloses a high quality polyurethane foaming system for refrigerators and a refrigerator based on the same. The raw materials include combined polyether, a physical foaming agent HFC-245fa or a physical foaming agent HFO-1233zd (E), a foaming assistant PF-5056 and isocyanate compounded according to certain mass fraction ratio. The polyurethane foaming system with the formula has the advantages of high fluidity, high heat preservation, high mechanical strength, and is in-combustible in-explosive. A rigid polyurethane foam prepared from the system foaming liquid has low thermal conductivity and strong mechanical properties, thereby enhancing the thermal insulation performance and structural stability of the refrigerator.

Description

technical field [0001] The invention belongs to the field of heat preservation of low-temperature storage equipment. Background technique [0002] With the tight housing area of ​​modern families, there is an increasingly strong demand for thin-walled household refrigerator products. In the manufacturing process of refrigerator thin-walled products, due to the thinning of the refrigerator wall, the thermal insulation performance and mechanical strength of the foam layer are deteriorated, and the flow of foaming raw materials at the corners with complex structures is insufficient, resulting in false filling. . However, the cyclopentane foaming system widely used in refrigerators cannot meet the technical requirements of thin-walled products. Therefore, it is imperative to develop a foaming system with high fluidity, high heat retention, and high strength. Contents of the invention [0003] The present invention aims to solve the shortcomings of the above-mentioned prior a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08J9/14C08G101/00
CPCC08G18/482C08G18/4833C08G18/5024C08G18/7664C08J9/146C08J2203/142C08J2203/162C08J2375/08C08G2110/0025
Inventor 刘鹏江峰吴园
Owner CHANGHONG MEILING CO LTD
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