When deciding what insulation core of insulated panels to use in a construction project, it is important to evaluate the different options that are available considering the type of climate, temperatures of the place, as well as the specific use that will be given to the property to be developed. In this sense, the following questions commonly arise: what type of core (insulating foam) is most suitable for my building project? Is PIR insulation of my convenience or is PUR core foam my option to choose?
If you are looking for more details, kindly visit pu panel wall.
This time we review the differences and advantages of the two most popular sandwich panel variants, in a comparison exercise between them (PUR vs. PIR)
For many, it is known that the PUR (polyurethane) insulating panel is less expensive than that of PIR (polyisocyanurate) and the reason for this, as you may imagine, lies in the quality of the core material. Although nothing is absolute and will depend a lot on the ultimate purpose of the building, PIR insulation is commonly known as a better quality alternative than PUR.
First of all, we must mention the R-value, which is a measure that is used to know the materials&#; thermal resistance, that is, the more struggle the heat has to pass through the layers of the material (aka. thermal conductivity), the more insulation it can offer.
Although performance depends on uncontrollable external factors, such as climate, and on aspects of the material such as its thickness, in general, the R values &#;&#;of PIR are higher than those of PUR.
In line with the above, another important data is the U-value, which measures the thermal transmittance, defined as the amount of heat that can be transferred through a material measured in watts per square meter Kelvin (W/m2*K).
The U-value by definition is inversely proportional to the R-value, in other words, the lower it is, it indicates that there is lower transmittance, thus proving that the material has better insulating capacity. Again, under constant conditions, the PIR core has a lower U-value than the PUR core.
The two above also correspond to the K value, which measures the thermal conductivity, that is, the material&#;s ability to conduct heat.
Similar to the U-value, the lower the number, the better the thermal performance of the sandwich panel core. Thus, polyisocyanurate foam tends to have substantially lower K values than polyurethane.
In general, it can be said that since the R, U, and K values of the PIR insulation panels are better than those of PUR, nevertheless, when evaluating which material to prefer, the use of the building should not be neglected.
For example, if insulated metal panels are to be used for food storage (cold), then resistance, transmittance, and thermal conductivity will be a highly important aspect of decision making and the PIR core foam is likely to be more suitable if a relatively thin coating is required. In contrast, if it were decided to use a PUR panel for this case, its thickness would have to increase in order for it to reach R, U, and K values similar to those of its PIR equivalent.
On the other hand, if instead of food storing, the building was to be used for manufacturing goods and if the case was that the heat had no great impact on human conditions or the performance of machinery, the use of a less thick PUR sandwich panel could be considered.
The above also leads us to take into account the economic aspect since, although the PUR panel tends to be cheaper for the builder and the developer, it could happen that for the client this translates into greater use of air conditioning or heating, a situation that inevitably means higher operating costs compared to a building covered with PIR insulated panels (of similar thickness).
The climate of the location where the panel will be installed is another topic to evaluate, since in humid and hot tropical weathers or in both northern and southern where extreme cold temperatures are reached, thermal insulation will take on more relevance than in locations where weather conditions tend to be more steady.
As a conclusion, due to the density of its structure, taking the environment, thickness, energy savings, and uses as a constant, the PIR insulation panels could be considered a better alternative in comparison to those of PUR core.
However, paradoxically, we cannot recommend an absolute decision, since for each project a technical evaluation has to be carried out in order to declare what is best for a particular construction project in economic, operational, environmental, human, and safety terms.
05 May
Most of the people only know about PU insulation panels,as the best thermal material in the world so far, only some professional buyers in related industry,they understand there is PUR and PIR. PU is short for polyurethane, and today we will introduce more details about PUR and PIR insulation foam for you. So you can understand them better and know which one will be better for your projects.
&#; The history of PUR and PIR
No matter it's PIR or PUR,they are both originated from polyurethane, which is a plastic material that invented by German scientist Otto Bayer and his colleagues in . In , rigid polyurethane (PUR) was created,because of the accidental introduction of water.
Then in , scientists improved upon PUR&#;s thermal stability and flame resistance,and finally create polyisocyanurate (PIR).
This is a development process of the classic polyurethane rigid foam. Today, PUR / PIR is widely used in various fields, such as construction industry(painting,insulation panels,etc).
&#; Comparison between PUR and PIR
Here we can understand some difference between PUR and PIR through the following chart. From this chart,we can find that in the comparison of various performances, PIR is obviously performing relatively well,especially on compressive strength and fire resistance performance.
Content
Unit
PUR
PIR
Thermal Conductivity
W / m·k
&#;0/020
0.018 (25&#;&#;
Compressive strength
MPA
0.265
0.294
If you want to learn more, please visit our website heat resistant materials for roofing.
Water absorption rate%
&#;
&#;0.5
&#;2
Dimensional stability %
&#;
&#;1%
&#;0.5
Flame retardancy
Self-extinguishing
Flame retardant
Fire performance
B3
B2-B1
Density kg/m2
kg/&#;
0.038
0.035
Convective heat transfer
Bond strength MPA
MPA
12.4MPA
&#; Advantages of PUR and PIR
Except the comparison,of course PUR and PIR insulation foam has their own advantages,too.
Advantages of PUR:
· Because of PUR&#;s high water resistance,it can minimize the impact of water damage in wall in flood prone areas.
· As insulation material,PUR foam is able to reach small spaces to create an air-tightness wall for your building.
· PUR insulation foam can be spray onto any type of wall surface.
Advantages of PIR:
· Compared to PUR fire resistant performance,PIR slows the spread of flames and reduces the smoke emitted from the fire,and max can be B1 level fire resistance.
· High compressive strength makes PIR can be used for insulated metal panels,and apply in various buildings,such as commercial buildings,industrial buildings,residential buildings,etc.
· Excellent thermal performance of PIR,it requires only half the thickness of traditional mineral-based insulation products.
&#; PUR/PIR sandwich panels in Yumisteel
We can produce both PUR and PIR insulated panels,there are also roof and wall SIP panels for your choices,our sales team can offer you professional advice for which one will be better choice for your project.
Contact us to discuss your requirements of fireproof roofing sheets. Our experienced sales team can help you identify the options that best suit your needs.