How to figure out the profile of blowing agencies for XPS production
In my previous how to we discussed how exactly to configure your XPS production line. Today, I am going to let you know something about how to determine the portfolio of the blowing realtors for XPS creation. I am going to discuss from 4 aspects, local regulation, supply availability, regional insulation standard, and technical issues.
Of all first, local regulation, probably the most well-known blowing agent of XPS is Freon, some halocarbon including CFCs, HCFCs and HFCs. Every nationwide country provides its regulations about the usage of Freon. In most created countries, HCFC now is banned, while in some developing countries like China, can use it until 2030 still, Indonesia may use it until 2040. But many countries are undertaking the new intend to increase the phasing out plan of HCFCs. One thing I have to address is the fact mixer extruder that because of the poor solubility in polystyrene, CO2 can't be utilized as blowing agent by itself; it must be used in combination with other co-blowing agent like ethanol together, butane or DME etc. as solvent to greatly help CO2 solve in to the polystyrene.
Secondly, source availability. In some national countries, some kinds of blowing real estate agents aren't available. For example, in a few Middle East countries, ethanol isn't available and not permitted to import, and that means you have to use something else to be alternatives. And in a few national countries, hFCs aren't available and not permitted to use actually, aside from HCFCs. You have to check with your expert to start to see the source availability.
Thirdly, local insulation standard. Almost every national country has its own standard of thermal conductivity of XPS panel. Let's consider China; the China nationwide regular of thermal conductivity of XPS is definitely 0.030. On the other hand, some national countries don't use thermal conductivity because the regular; they make use of thermal resistance value or R value rather. But so how exactly does the typical has something to do with your recipe of blowing agent? The reason is that using different blowing agent can lead to different thermal conductivity. For example, when you use HCFCs or HFCs, you can control the lambda value below 0.029. Nevertheless if you are using CO2 plus ethanol, it is hard to make the lambda value under than 0.033. To find the lambda value below 0.030, some ongoing businesses are using the mixture of HFC, Ethanol and co2.
The final issue, I'd prefer to talk about is the relationship between thickness, hardness as well as the recipe of blowing agent. Using HCFCs or HFCs is simpler to obtain width like 15cm. If you are using CO2 alone as the primary blowing agent, it might be very hard to obtain such thickness unless your series can yield 1.5 ton each hour. But CO2 is normally advisable whenever you produce very high compressive power panel like 1000kpa for particular use, because CO2 has smaller cell volume which is beneficial to obtain finer cell structure of the plank.