In my previous how to we discussed how exactly to configure your XPS creation line. Today, I will tell you something about how exactly to figure out the portfolio from the blowing providers for XPS creation. I will discuss from 4 factors, local regulation, source availability, regional insulation regular, and technical issues.
First of all, local regulation, probably the most well-known blowing agent of XPS is Freon, some halocarbon including CFCs, HCFCs and HFCs. Every country has its rules about the usage of Freon. In most developed countries, HCFC is banned now, while in some developing countries like China, can use it until 2030 still, Indonesia can use it until 2040. But many countries are carrying out the new plan to increase the phasing out schedule of HCFCs. One thing I have to address is that due to the poor solubility in polystyrene, CO2 cannot be utilized as blowing agent alone; it has to be used in combination with additional co-blowing agent together like ethanol, butane or DME etc. as solvent to greatly help CO2 solve into the polystyrene.
Secondly, source availability. In some countries, some forms of blowing real estate agents are not available. For example, in a few Middle East countries, ethanol isn't available and not permitted to import, and that means you have to make use of something else to be alternatives. And in a few national countries, hFCs are not obtainable rather than permitted to make use of actually, aside from HCFCs. You have to consult with your authority to start to see the source availability.
Finally, local insulation standard. Almost every country has its own standard of thermal conductivity of XPS table. Let's consider China; the China national regular of thermal conductivity of XPS is 0.030. On the other hand, some national countries don't use thermal conductivity as the standard; they make use of thermal level of plastics extruder resistance value or R worth rather. But so how exactly does the typical has something to do with your recipe of blowing agent? The good reason is the fact that using different blowing agent can result in different thermal conductivity. For example, when you use HCFCs or HFCs, it is possible to control the lambda value below 0.029. However if you are using CO2 plus ethanol, it really is hard to help make the lambda value under than 0.033. To get the lambda value below 0.030, some ongoing companies are employing the combination of HFC, Ethanol and co2.
The final issue, I'd prefer to talk about may be the relationship between thickness, hardness as well as the recipe of blowing agent. Using HFCs or HCFCs is simpler to obtain thickness like 15cm. If you are using CO2 alone because the primary blowing agent, it would be very hard to get such thickness unless your range can yield 1.5 ton each hour. But CO2 can be advisable if you produce high compressive power plank like 1000kpa for special make use of, because CO2 has smaller cell quantity which is beneficial to get finer cell structure of the panel.