|Pure Natural Latex||Natural Latex with Fillers||Synthetic (SBR) Latex|
|Physical Appearance||Creamy white natural Latex colour
Extremely fine foam structure
Sweet odour of natural latex when fresh
|Colour varies according to the type of filler used. Titanium dioxide for example will give the foam a dull white colour. Kaolin clay produces a grey foam.
The sweet fresh natural latex odour is suppressed by fillers
|Artificial White colour Coarse structure with large pores and thin bubble cell wall|
|Structural Properties||Open cell system
Extremely fine structure – strong gel strength and excellent support capability.
|Open cell system
Coarse foam structure – filler reduces gel strength and causes poor support capability.
|Open cell system
Large pores, poor gel strength and poor support capabilities
|Costituent Composition||100% Pure Natural Latex||70 – 85% natural latex, 15 – 30% fillers. Fillers are added to increase hardness and as a cheapener to reduce the cost of production.||70 – 85% SBR (Styrene Butadiene Rubber).
15 – 30% fillers may be added to increase hardness and to act as a cheapener.
|Dynamic Properties||Excellent, with good resilience, low hysteresis, low permanent set, high elasticity, excellent tensile properties and highest recovery to original shape after deformation. Excellent tear resistance.||Poor Inorganic fillers reduce tensile properties, particularly elongation at break. They also suppress resilience, promote high permanent set and reduce its ability to recover to the original shape. Filled latex is as good as ‘dead’ foam.||Very poor as SBR foam does not recover its original shape after compression as quickly or as much as natural latex foam. It is nowhere close to the resiliency natural latex can provide. SBR foam has poor tensile properties and weak tear strength.|
|Durability||Natural Latex Foam is durable. According to research a pure Natural Latex Foam without fillers can easily last 25 years.||Natural latex with fillers is not as durable as pure latex. The service life of a product made from latex with fillers is not expected to exceed 5 years.||Synthetic Latex foam loses its strength after a short period of use. It is not as durable as Natural Latex foam in any way.|
|Environmental Considerations||Natural Latex is derived exclusively from pure, super clean, unadulterated natural rubber latex from trees. It is cultivated through new planting and replanting programmes from large scale plantations to ensure a sustainable supply of latex.||The environmentally friendly attributes of natural latex are suppressed by the presence of fillers, particularly when fillers such as calcium oxide or titanium dioxide are used.||Synthetic latex can be seen as an environmental hazard – it is a product of the petrochemical industry and it is contributing to the depletion of our non-renewable fossil resources.|
|Fire Hazards||When ignited, natural latex foam will produce a smoke that is largely composed of carbon||When ignited, filled natural latex foam produces toxic fumes from the decomposition of the filler||When ignited, synthetic latex foam produces smoke that contains toxic substances such as phenols, isocyanides, benzenes etc.|
|Anti-Bacterial Properties||Hypoallergenic, clean and healthy, Natural Latex Foam has inherent natural anti-bacterial properties that discourage the growth of bacteria and fungus. Without the assistance of bacteria and fungus, dust-mites are unable to digest dead skin cells from humans. Ultimately natural latex is inhospitable to dust-mites.||Hazardous and harmful – the insertion of fillers destroys the anti-bacterial properties of Natural Latex. It allows the growth of fungal and bacterial populations, which in turn encourages the growth of dust-mite populations.||Synthetic Latex has no anti-bacterial properties. Chemical additives in the form of anti-bacterial agents are often used to protect the foam from dust-mites.|
|Disposal||Disposal of natural latex foam would commonly be by biological decomposition in land-fill, preserving the ecological balance.||Fillers retard the efficacy of biological decomposition, besides generating toxic gases as the filler breaks down.||This foam cannot be broken down without the application of external energy, so biological breakdown does not occur. Disposal of these foams is often by burning, contributing to air pollution and climate change.|
|Non Toxic||Anti Bacterial||Self Ventilating|
|Non Allergenic||Resilient||Contaminent Free|
|Dust Free||Odour Free||Healthy|
|Mould Free||Durable||Relaxes Tired Muscles|
|Mildew Free||Quiet||No Ozone Depleting Substances|
|Fungus Free||Flexible||Resists Moisture build-up|