1.HOW IS POLYURETHANE FOAM (PU FOAM) MADE?
Polyurethane Foam or commonly known as Sponge in Arabic is derived from a chemical reaction of a di-isocyanate with a polyol. Once this reaction has occurred, foam is created that is safe and extremely versatile. It can have a number of diverse properties (resilience, flexibility, rigidity) depending on the choice of combined substances.
2.WHAT ARE USES OF POLYURETHANE FOAM?
Polyurethanes have hundreds of different uses. The material is so versatile that it is everywhere — it’s under your carpet, in your kitchen sponge, in your furniture and your bed, in your walls, on the soles of your shoes and in your athletic helmet. Because of its wide range of applications, the industry is constantly coming up with new ways of using the material, so the list is always growing.
3.HOW CAN PU FOAM BE BOTH HARD AND SOFT?
Essentially, all polyurethanes foams belong to the same chemical family. They are created by means of a chemical reaction combining a di-isocyanate and a polyol and the properties are adapted to the final application.
4.IS POLYURETHANE FOAM SAFE?
Yes, Polyurethane foam is an entirely safe product in the many diverse applications it is used for.The di-isocyanates it is produced from are consumed during the chemical reaction that creates polyurethane. However, risk assessments have shown that other substances can be released from foam, as volatile organic compounds, depending on the composition and production method that is used.Purchasing products with certified foam is the best guarantee to be 100% sure that no substances are being released from the foam at levels that may have consequences on anybody’s health. At International Industries, we produce foam which is certified by Oeko-Tex.
5.WHAT IS DENSITY OF PU FOAM?
Density continues to be one of the most misunderstood properties of polyurethane foams. Density is weight per unit volume is expressed in Kilograms per cubic Meter (Kg/M3).Some people mentally relate density to the firmness of foams, and that relationship is totally incorrect. A high density foam can be made soft & hard.
6.WHAT DOES HARDNESS MEAN?
Hardness - this is a measure of the 'feel' of a foam and is closely related to perceived consumer preference. All foams manufactured international industries Foams are tested for hardness and manufactured according to application.
7.WHAT IS MEANT BY COMFORT FACTOR?
A technical measurement that calculates comfort. It is the hardness at 65% compression divided by the hardness at 25% compression. It provides an indication of how supportive the foam will be in use - the higher the number, the more supportive. Ranges from 1.5 to over 2.5 depending on foam type & quality.
8.WHAT IS TEAR STRENGTH?
Tear Strength is a measure of the force required to continue a tear in a foam after a split or break has been started and expressed in pounds per inch (lbs/in.). This property is important in determining suitability of foam in applications where the material is sewed, stapled, or otherwise anchored to a solid substrate.
9.WHAT IS TENSILE STRENGTH?
The force required to stretch a standard size foam piece until it breaks.
10.WHAT IS DURABILITY?
How well an PU Foam retains its comfort, support and shape with use over a period of time is durability.
11. WHAT IS RESILIENCE?
An indicator of the surface elasticity or "springiness" of PU Foam. It is measured by dropping a standard steel ball onto the FPF cushion from a given height and measuring what percentage the ball rebounds.
12.WHAT IS RECOVERY?
The amount of return to original dimension and properties of an PU Foam sample after a deforming force is removed.
13. WHAT IS INDENTATION FORCE DEFLECTION (IFD).
A measure of the load bearing capacity of flexible polyurethane foam. IFD is generally measured as the force (in pounds) required to compress a 50 square inch circular indenter foot into a four-inch-thick sample, typically 15 inches square or larger, to a stated percentage of the sample's initial height.
For more information please visit : http://www.polyurethanes.org/