At present, the consumption of polystyrene (PS) in the world is huge, and the annual consumption in the United States alone is more than 3 million tons. In the manufacture of PS foam sheet extrusion, conventional blowing agents used are Freon and alkane. Freon can cause global warming and depletion of the ozone layer, which is prohibited by the international community. Chain hydrocarbons are flammable and affect production safety.
Dow Chemical has announced that it has developed a new process for the extrusion of PS foamed sheets using 100% CO2 as a blowing agent. Dow Chemical Company has issued new technology licenses for the replacement of existing polystyrene foam boards with CO2 worldwide.
CO2 is incombustible, increasing production safety; it does not deplete the ozone layer and has little impact on global warming (HCFC-22 has a global warming potential of about 1700 times that of CO2, and CFC-12 about 5800 times that of CO2. ); cheap, small amount, easy to recycle, economical and practical; non-toxic, suitable for the production of biodegradable tableware. Therefore, relatively speaking, CO2 is a safer and more environmentally friendly blowing agent. In addition, PS foam packaging products produced using CO2 foaming agents have better stretchability, are less likely to break, and have a longer service life. Therefore, the use of CO2 as a blowing agent has great advantages in industrial applications.
Dow Chemical has announced that it has developed a new process for the extrusion of PS foamed sheets using 100% CO2 as a blowing agent. Dow Chemical Company has issued new technology licenses for the replacement of existing polystyrene foam boards with CO2 worldwide.
CO2 is incombustible, increasing production safety; it does not deplete the ozone layer and has little impact on global warming (HCFC-22 has a global warming potential of about 1700 times that of CO2, and CFC-12 about 5800 times that of CO2. ); cheap, small amount, easy to recycle, economical and practical; non-toxic, suitable for the production of biodegradable tableware. Therefore, relatively speaking, CO2 is a safer and more environmentally friendly blowing agent. In addition, PS foam packaging products produced using CO2 foaming agents have better stretchability, are less likely to break, and have a longer service life. Therefore, the use of CO2 as a blowing agent has great advantages in industrial applications.
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