What Is Flamex Melamine Acoustic Foam?

History of Flamex acoustic foam
Flamex is the brand name of various melamine acoustic foam products. In the past, Flamex (Basotect) was exclusively applied in yacht- and ship building to soundproofing engine compartments, or engine rooms. And widly used in the manufacturing of machine enclosures, such as air compressors and pumps. These Flamex acoustic foam variants, Flamex FC and Flamex PU, are still being used for these applications in which the acoustic foam need to meet high requirements.

Nowadays, the range of Flamex products has become significantly larger. In this article you can read everything there is to know about the various types of acoustic foam and where to apply them, for soundproofing, insulation or to improve room acoustics.

What is Flamex acoustic foam?
Flamex, also known as basotect, is an acoustic foam with an open cell structure made from melamine resin, a thermo-set polymer. A three dimensional molecular network structure is created during the production process, which results in unique product properties compared to other acoustic foam products, such as polyurethane foam. One of these properties, fire safety, has yielded the brands name Flamex. If Flamex burns, nitrogen gas is released, which has a flame-retardant effect.

Flamex has a hard molecular structure, making it very easy to cut the material to size. Since foam flexes less while cutting compared to, for example, polyurethane acoustic foam, it can be carved and cut into all kinds of shapes. The production process delivers an open cell structure, this causes the texture of the material to consist of small air bubbles. Usually, these are smaller than 5 mm, but per square metre there can be a maximum of 10 bubbles of 5 mm visible at the surface.

Flamex acoustic panels 
The Acousticshop has a nice range of various types of Flamex acoustic foam panels to improve room acoustics. Since it is so easy to process this material the design can be tailored to any shape.

On our tips pages "Reverberation & room acoustics" you can find general information about how to improve acoustics in different locations. The article 'Reverberation at Home', focuses specifically on improving the room acoustics at home. The following types of Flamex acoustic panels are suitable to optimise the acoustic climate of your room, like in the home studio from a customer seen below:

• Flamex Edge
  The most popular variant for improving room acoustics is Flamex Edge. A sturdy foam panel with a thickness of 50 mm that guarantees good absorption properties and ease of installation. Due to the faceted edges around the product the panels can be mounted against each other, without the shrinkage of 2% to becoming visible. Flamex Edge is available in white and grey.
• Flamex Pyramid
  In the Flamex range you can also find panels with a pyramid structure, for that typical 'studio look'. The pyramid dimensions are 50 x 50 x mm and a version with 100 x 100 mm on a foam base of 20 mm. Flamex Pyramid can also be applied at school, home or in offices to improve room acoustics.
  
• Flamex Basic
  As the name of this variant already indicates, the basic variant comes at a basic price. Flamex Basic isn't processed and has a flat structure, making it suitable to cover the ceiling with. Flamex Basic has a neutral look, because of which it is almost invisible (except for some small seams between the different plates). Basic products are often applied in sports canteens, schools, or club buildings, due to their attractive price and ease of application and installation.
  

Technical specifications and properties

• Absorption coefficient of Flamex Basic  
  25 mm thick: NRC = 0,60; αw = 0,58
  50 mm thick: NRC = 0,80; αw = 0,75
   
• Fire classification Flamex
  EN-13501-1 fire class C, smoke number S2, drip number D0. DIN 4102 class B1.
  Temperature resistance: -43 °C up to +100 °C.
    
• Colours
  Flamex is available in two colours:
  White, approximately RAL9001.
  Light grey, approximately RAL7047.
  Flamex cannot be painted over.

Tolerance and margins
Because of processing reasons, a cutting tolerance applies to most Flamex variants, according to DIN ISO 286-1 IT17. Tolerances from the dimensions are approximately 2%. Since Flamex has an elongation and shrinkage of 2% the product needs to acclimatize for about 12 hours in the room where the product will be applied.

Tips for processing and installation
Because of its elongation and shrinkage properties, Flamex cannot be attached by means of double-sided tape, but only by using Stauf Extreme Tack adhesive paste. This odourless adhesive paste can easily be applied and ensures a direct adhesion on practical any surface. In order to cut Flamex to size you can make use of a knife.

Questions? 
Do you have any questions concerning this topic, or perhaps you would like to receive a product sample? Please feel free to contact us.