Mattresses
Pressure Redistribution Mattresses
All MacMed Healthcare mattresses are manufactured from the finest hospital grade foam that contours to the body effectively providing maximum pressure redistribution, skin integrity and patient comfort.
All foams used are treated with internationally renowned Ultra Fresh anti-microbial system that is effective against dust mites, bacteria, mould and mildew.
All MacMed Healthcare mattresses are fully endorsed by the National Asthma Council and bear the Sensitive Choice logo.
Covers are made from a scientifically developed two-way stretch, hypoallergenic fabric that is also waterproof and vapour permeable for optimum skin integrity and comfort. All seams are high frequency welded and/or supplied with a 360° zipper cover with waterfall flap to maximise infection control.
Mattress covers have a 2 year warranty except in the case of trolley mattresses which have a 12-month warrantee.
All mattress configurations undergo extensive pressure mapping, durability, hardness and flammability testing. This rigorous process is conducted by an independently accredited NATA (National Association of Testing Authority) laboratory using the indentation force deflection method at 65% compression.
Unless otherwise specified, all foams have a 5 year warranty.
Technical Information
Compression Set
Compression Set is usually measured by compressing a 25mm thick sample for 22 hours at 70°C and measuring the percentage thickness lost following the compression cycle.
Density
The mass of a foam piece measured in kilograms and divided by its volume in cubic metres.
Elongation
Elongation is measured together with tensile strength. It is the percentage extension of the test piece at the point of maximum stretch, before breaking.
Flammability Standards
Standardised methods in which a test sample of the material, such as foam or foam and cover combination are subjected to ignition sources of varying intensity for a given time. Performance in such tests may be graded. Actual fire performance of manufactured items depend on a number of factors. Small scale flammability tests are mostly used in quality assessment of flame retarded foam grades.
Hardness
Hardness is expressed and measured as indentation force deflection (IFD). This is the force in Newtons required to compress a test sample or a cushion by 25%, 40% and 65% of its initial thickness using a 200mm diameter standard indentor. The reference hardness is the 40% indentation force deflection value.
IFD 25% Recovery
The measure of elasticity or hysteresis of a foam sample. A high ratio of 25% recovery, such as 75% - 80% indicates good recovery properties of a given foam during the loading/unloading cycles.
Indentation Factor
This property is one of the indicators of foam comfort. Higher indentation or ‘sag’ factor figures mean softer ‘initial feel’ coupled with good base support. Generally in the 1.6 to 2.6 range for 50mm test pieces.
Porosity
The following foam types are defined in the AS2281-93 standard: H – for heavy duty conventional; N – for normal duty conventional; HR – for high resilience; LR – for low resilience and BC – for bonded crumb.
Resilience
Measured as ball rebound, it is an indication of ‘springiness’ or bounce of the material. Generally in the 40% to 60% range for seating foams and less than 30% for impact absorbing grades.
Tear Resistance
A measure of the resistance of the foam piece to tear propagation, tested on a small sample and expressed in Newtons/metre.
Tensile Strength
A measure of the force required to stretch a test piece of standard thickness until it breaks. The elongation at break is measured as the percentage extension of the piece at the point of break (see elongation).
