What is foam plates insulation?

foam insulation is a leaf, usually in the size of four to eight feet (1.2 x 2.4 m), solid foams used in almost all aspects of the building building to ensure thermal resistance in floors, ceilings and walls. In principle, three materials are basically used to produce foam plates: polyurethane, polyisocyanurate and polystyrene.

Polyurethane and polyisocyanurate foam are very similar to the content. Foam plate with closed cells is first made by liquefy pellet and then introducing the blowing agent. In the case of these two products, the blowing agent is usually one of the hydro fluoro compounds (HFC) or Chloro fluoro coal (CFC). The blowing agent creates gas bubbles in the mixture when it is heated. Hot, liquefied polyurethane or polyisocyanurate is then forced to dye the shape of the plate. After cooling the mixture, they are cut into any desired length. The resulting foam plate is a higher value of R (resistance to thermal flow) than polystyrene foam, USAUALLY R7 or R8 per thumb (2.54 cm) thickness.

The polystyrene foam plate is made in almost the same way as polyurethane and polyisocyanurate foam, except for expansion differences. There are two basic types of insulation of polystyrene foam plate: pressed enlarged polystyrene (MEPS) and extruded enlarged polystyrene (XEP). The difference in these two types of foam plate is the strength of the finished product, although the density, about 1.5 pounds per cubic foot (0.21 kilograms per cubic meter), is usually the same.

The MEPS board insulation, often called Beadboard , is produced by mixing non -expanded polystyrene pellets or beads containing a pentan with a blowing agent. The resulting mixture is poured into a closed container and heats up. The heat causes the beads to expand to many times their normal size. The mixture is then poured or injected into a mold, more heat is applied and the resulting foam blocks are shaped into foam insulationboards.

XEPS is produced by mixing polystyrene pellets with chemicals to liquefy them. Once the blowing agent is injected into the mixture and is heated, gas bubbles are formed and the hot material is poured into a mold. When it is cool, they are cut into any desired shapes. XEPS is stronger than MEPS, has a higher compression power. Due to the greater force, the XEPS is often used for roofs and walls in a new structure. Extruded polystyrene also has a higher evaluation for moisture resistance.

MEPS I XEP have lower values ​​R than polyurethane and polyisocyanaturorate foam, evaluation about R5 per inch (2.54 cm) thickness.