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PROPERTIES OF MATERIALS - ABSORBENCY, DENSITY AND FUSABILITY
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ABSORBENCY
The ability of a material to absorb another substance, that in itself is capable of being absorbed. Under normal circumstances this would mean a liquid or gas being ‘absorbed’ by a material.

Our technician demonstrates absorbency, by submerging a sponge in water and then testing if it has increased by weight, a few minutes later.

 
 
 
 

DENSITY
A material’s ‘mass’, per unit of volume. Density is calculated by dividing a material’s mass (in kilograms) by its volume (in cubic metres). Essentially, mass can be considered as the compactness of a material. For example, a cubic metre of a sponge is lighter and therefore much less dense, than a cubic metre of stainless steel, which is much heavier.

Our technician demonstrates density, by lifting a low density standard unit of foam, followed by a high density standard unit of stainless steel.

 
 
 
 

FUSABILITY
The ability of a material to be transformed from a solid state to a liquid state, due to the application of heat. This can mean fusing two metals together along a seam / joint (welding) OR fusing thousands of polymer pellets together, through the injection moulding process.

Our technician demonstrates fusability by welding to metals together, forming a permanent joint.

 
 
 
 
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