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Foam Facts

Our 100% British Manufactured Medical Grade Foam

Foams today are made from a combination of rigorously tested chemicals, water and air. Visco elastic type foams (memory foam), for example, are made from a base of polyurethane, which is then mixed with a Toluene Diisocyanate (TDI) an organic compound. Once the relative chemicals are combined (CME, CMHR or Visco), a chemical reaction causes the liquids to expand, much like a loaf of bread baking in the oven.

All foams are produced in factories who carry both ISO 19001 & ISO 14001 2015 Certified standard.

The “structure or feel” of the foam is achieved by the level of relevant densities and nominal hardness factors combinations. All of these properties are achieved by the ratio of chemicals and fluids used in each grade of foam. The introduction of specialist gasses into the solution, allows the “cell structure” to develop (which looks like the inside of a loaf of bread). The addition of more gas means a more open cell structure and less gas, a less open cell structure etc. This cell structure will also determine how much heat and moisture can ‘breathe’ through the foam and the level of superior support the specially chosen grade of foam can offer.

Foam mattresses are the ideal solution for medical environments as foam is hypoallergenic, anti-bacterial and naturally both bed and dust mite resistant. It is this information that is clearly demonstrated in our technical information, foam grade combinations and is stated alongside every Herida product.

Only by using years of combined experience both within the pressure reducing and pressure relieving markets, as well as working with a British Foam Company who have been trading since 1958, have our teams been able to develop the relevant foam grades to produce some of the finest products available in the UK to our customers and at very competitive prices.

CME Vs CMHR Foams – What’s The Difference?

CME (Combustion Modified Ether) foam is becoming one of the most prevalent forms of foam available for both the medical and furniture industries. As such, this type of foam is rapidly being recognised for the advanced technology in manufacturing the foam and is fast replacing CMHR (Combustion Modified High Resilient) foam. CMHR foams are still available but it is manufactured using older technology, and as such is not produced in large quantities. Both foams are forms of combustion modified polyurethane based foam, which starts its life in liquid chemical format.

Ask your suppliers for CME foams today or better still, rest assured that Herida Healthcare provide only these types of advanced technology produced foams producing high quality products.

Foam Fatigue Class Definitions

Often when people are explaining foam fatigue classifications, abbreviations are quickly adopted by company representatives or foam “experts”. At Herida, we would like to simplify the process and take time to show you what the abbreviations mean as shown below:

  • L – Light
  • A – Average
  • S- Severe
  • V -Very Severe
  • X – Extremely Severe

Examples in the real world taken from the definitions above are those such as light (L) or average (A), would equate to that of occasional use, such as a patio furniture cushion. The opposite extreme or (X) Extremely Severe, would be used in items such as a rigid prison mattress, requiring extreme longevity and excessive fire retardancy (although this is another category of understanding).

Mattress or cushion bottoming can occur when the incorrect foam densities, nominal hardness or fatigue classification combinations are incorrectly prescribed.
We can make these decisions for you, by only producing the very best qualitiy and foam combinations available.

Herida will only use Severe as an absolute minimum, in lower cost option products and Very Severe in premium products as standard, producing the very best quality and longevity.

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