The types of foaming agents used in refrigerated containers include polyurethane foaming agents, polyurethane black and white foaming agents, polyether polyol combination materials, etc. These foaming agents are mainly used for thermal insulation of refrigerated containers to improve the performance and efficiency of containers. For example, polyurethane foaming agent is a commonly used material that can expand through chemical reactions to form fine pores, thereby providing good thermal insulation. In addition, polyurethane black and white foaming agents and polyether polyol combination materials are also important materials for thermal insulation of refrigerated containers. They form fine pores through different physical or chemical reactions to achieve the purpose of thermal insulation.
The selection and application of these foaming agents are not only related to the performance and efficiency of refrigerated containers, but also to environmental protection and sustainability. For example, some foaming agents may contain substances that are harmful to the ozone layer, so special attention should be paid to environmental protection requirements when using these foaming agents. In response to this problem, the Ministry of Ecology and Environment has issued a relevant announcement to prohibit the use of HCFC-141b as a foaming agent in the production of refrigerators and freezers, refrigerated containers, electric water heaters, etc., in order to promote the development and application of more environmentally friendly alternative technologies.
In addition, with the advancement of technology and the improvement of environmental protection requirements, more environmentally friendly and efficient foaming agents may be developed and applied in the future to meet the insulation needs of products such as refrigerated containers.
