KontactInfoHomepage

Our ProductsOur MaterialsPhilosophyEOPPSELCertificationsAwardsTechnicalNews

Technical

Quality and Physical proper test

The physical property of the mattress core and the hardness is essential to be checked as this ensure the quality and the life time of the mattress.

Hardness

The hardness and the density of a latex foam mattress core are interrelated. When the density increases the hardness value also increase. The Indentation Load Deflection (ILD) of hardness as per ISO 2439 standard states that the equal force that is required to press the mattress core until 25 %, 40 % or 60% from its original height with a circular plate of 322 cm². The Compression Load Deflection (CLD) hardness as per ISO 3386 standard, which is the force apply to press the mattress core 25 % of its original height measured in kpa (kilo Pascal).

Resilience/Elasticity

The Resilience/Elasticity is measured to ASTM 3574 standard this is measured by using a steel ball. The height of rebouncing of the ball is measured. On a latex foam core the rebounce factor is higher than 60% to 70%. This is much higher compared to synthetic foams.

Sag factor

It is important that the surfers of the mattress core is soft and when apply pressure it increasingly shows the resistance and come to the stop point. The sag factor is described through the ISO 2439 standard. The higher this index, the better the foam supports the body contour. The natural latex foam performs obviously better with a sag factor than synthetic products.

 
 

 

LGA–Bavaria,
Germany Officially
accepted Quality
testing institute

 

 

 

 

Durability/Lifetime

The most accepted method is to test the mattress core to the standards of EN 1957. A weight of 1400 Newton is rolled 30000 times up and down on the mattress core. Afterwards the height, the hardness and elasticity is measured. This is repeated once again and the results are compared with the original values. The average incline of the hardness is determined at 210 N, 275 N and 340 N in the load deformation curve.
The test of natural latex core by LGA Germany as per EN 1957 specifications the results were about 3 mm loss in thickness and 3 % loss in hardness for a latex mattress core.
The other method is to test according to ISO 3385 (DIN 5374) standard, a foam sample of 40 x 40 cm forced with a weight of 750 N for 80000 times at 70 strokes in the minute. Afterwards, the loss of height and the hardness is compared with the original value.

Hysteresis

The hysteresis can be determined by measuring the “banana foam” curve via loading and de-loading of a mattress. The load deformation curve is measured by means of a circular plate of 355 mm diameter, that gradually builds a force max. up to 1000 Newton.
The hysteresis is calculated with the load and de-load curve by the load surface. The hysteresis indicates the amount of energy that is absorbed by the latex core during loading / de-loading. The higher the absorption of energy by a mattress core, the more strength / energy is required to change the position on the mattress. The Mattress cores which is to soft, has a low hysteresis, results higher energy requirement for changing the position on the mattress core. This results to a poor sleeping quality. The mattress core with the results of the hysteresis between 20 - 30 % is a comfortable mattress.
M A L natural latex Mattress cores are being tested as per ISO 3386 standard in the production. Regular testing is been done by LGA as per EN 1957 as MAL has a monitoring contract with LGA, Germany.

Environment

Waste water treatment plant is designed by Rubberised Institute (RRI) of Sri Lanka. The BOD and the COD levels are daily / weekly tested and control by our own laboratories. Periodical test being done by RRI

Waste recycling

Waste and scrapped being disposed to small and cottage industries, where they produce different products with waste and scrap.