Basic information about foam
We invite you to familiarize yourself with the animation that presents the use of polyurethane in everyday life. We use them in various forms every day, including at home, in the office, in the car.
By clicking on the picture we can find out in an accessible way how many places and objects around us we use on a daily basis were used polyurethane.
Exchange of wool for open-cell polyurethane foam
We present another example of the use of polyurethane foam as insulation in a single-family home. The new building originally used mineral wool, which after four years lost its insulating properties. Therefore, the client decided to change the isolation to one that would meet his expectations. The choice fell on polyurethane foam because of its advantages:
Excellent adhesion to the ground
Everyone who has to deal with foam in the tube, most often used for mounting windows or doors, can imagine how strongly the polyurethane foam is bonded to the substrate. Therefore, there is no problem with adhesion to the attic, both when we talk about full boarding, patch-batten system, as well as a vapor permeable membrane or masonry. Polyurethane foam does not require the use of an additional support structure for the insulation layer.
A quick application
Another advantage of polyurethane foam is the speed of application. In contrast to classic insulation materials, pur foam does not require prior transport and storage at the customer, but is created on the construction site. Two polyurethane foam is formed from two liquids at the appropriate temperature, the appropriate pressure, mixed most often in the ratio of 1: 1 as a result of exothermic reaction (release of heat). The application process itself, although it requires practice, to maintain the appropriate insulation thickness, is rather similar to painting with a spray gun.
What distinguishes open-cell polyurethane foam against the background of all available insulation media is its high expansion. Especially in the attic with many bleeds, it is worth using PUR foam. All nooks and crannies will be perfectly filled, and insulating material will reach any place!
Although they can be sprayed with layers (eg closed-cell foam), finally, foam will always be a uniform insulation both in horizontal (area + area) and vertical (layer + layer). Excellent adhesion of the pur foam causes that we do not deal with thermal bridges present in competitive solutions.
Open-cell polyurethane foam also has acoustic and insulating properties. Thanks to this, for example in the attic as a thermal insulation, you also gain acoustic insulation
Polyurethane foam occurs in several density ranges. Generally, foam can be divided into open (8-15 kg / m3) and closed-cell (35-60 kg / m3). Due to the price, foam with the structure of open cells (less material consumption) is used most often on attics. Wherever the attic space is small, it is worth considering the use of foam with a closed cell structure – even better insulation in proportionally smaller thickness.
The use of polyurethane foam in the attic allows to reduce to a minimum the heat loss through the roof. The uniform structure of the insulation is free of thermal bridges, making it easier to maintain the temperature inside the room. This, in turn, translates into lower heating costs in the winter and air conditioning in the summer.
Polyurethane foam is odorless, ecological, and safe for health. The use of polyurethane foam insulation improves the climate throughout the building, which is very important in the case of people suffering from allergies.
Open-cell foam as acoustic insulation
PUREX NG0808NFB2W, produced by Polychem Systems Sp. z o.o. in addition to thermal insulation properties – determined in accordance with PN-EN 14315-1: 2013, it is also an excellent sound absorbing material. The results of tests carried out in a renowned acoustic laboratory are as follows:
Single-number sound absorption indicator αw according to PN-EN ISO 11654: 0.50 (LH)
Sound absorption class according to PN-EN ISO 11654: D
Description of sound absorbing properties according to VDI 3755/2000: sound absorbing material
The sound absorption coefficient determines the sound-absorbing properties of physical bodies. It is used for calculations for rooms in which acoustic adaptation is provided. The given coefficient takes the value from 0 to 1. The value of the coefficient αw = 0 means that the sound is completely reflected from the material, while the value of the coefficient on level 1 says that the sound will be completely absorbed.
According to PN-EN ISO 11654, there are 5 classes of sound absorption. The list of classes absorbs sound and the corresponding values of αw, show the characteristics of materials with acoustic absorption capacities.
The indicator absorbs sound αw The class absorbs
0, 90 – 1,00 A
0,80 – 0,85 B
0,60 – 0,75 C
0,30 – 0,55 D
0,15 – 0,25 E
0,00 – 0,10 Materiały niesklasyfikowane
The value of the coefficient absorbs the sound at the level of αw = 0.50 puts PUREX NG0808NFB2W open cell foam among sound absorbing materials (according to VDI 3755/2000). Thanks to the PUREX NG0808NFB2W open-cell insulation system, customers not only achieve excellent thermal insulation of their homes, but also protect their privacy from noise from outside, which often affects all household members.