How to figure out the portfolio of blowing realtors for XPS production

In my previous how to we talked about how to configure your XPS creation line. Today, I am going to let you know something about how exactly to determine the portfolio from the blowing agencies for XPS creation. I will discuss from 4 aspects, local regulation, supply availability, local insulation regular, and technical issues.

First of all, local regulation, the most well-known blowing agent of XPS is Freon, a series of halocarbon including CFCs, HFCs and hcfcs. Every country provides its own rules about the usage of Freon. In most developed countries, HCFC is banned now, while in some developing countries like China, still can use it until 2030, Indonesia may use it until 2040. But many countries are carrying out the new intend to increase the phasing out plan of HCFCs. A very important factor I must address is the fact that because of the poor solubility in polystyrene, CO2 can't be utilized as blowing agent alone; it must be used in combination with various other co-blowing agent like ethanol jointly, dME or butane etc. as solvent to greatly help CO2 solve in to the polystyrene.



Secondly, source availability. In some national countries, some kinds of blowing realtors aren't available. For example, in some Middle East countries, ethanol isn't available and not permitted to import, and that means you have to make use of something else to become alternatives. And in some countries, hFCs aren't available rather than allowed to use even, aside from HCFCs. You have to consult 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 table. Let's consider China; the China nationwide regular of thermal conductivity of XPS is normally 0.030. On the other hand, some national countries don't use thermal conductivity as the regular; they use thermal level of resistance worth or R value instead. But how does the typical has something regarding your recipe of blowing agent? The reason is that using twin screw extruder different blowing agent can lead to different thermal conductivity. For example, by using HFCs or HCFCs, it is possible to control the lambda worth below 0.029. However if you are using CO2 plus ethanol, it is hard to help make the lambda worth under than 0.033. To find the lambda value below 0.030, some businesses are using the mixture of HFC, CO2 and ethanol.

The last issue, I'd like to talk about may be the relationship between thickness, hardness as well as the recipe of blowing agent. Using HFCs or HCFCs is easier to obtain thickness like 15cm. If you are using CO2 alone because the main blowing agent, it would be very hard to obtain such width unless your collection can yield 1.5 ton each hour. But CO2 is advisable if you produce high compressive strength panel like 1000kpa for particular make use of, because CO2 provides smaller cell quantity which is helpful to get finer cell structure of the table.

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