| 摘要 |
<p>Pressure reduction matress (10), comprising a laminated foam mattress for reducing or relieving the pressure exerted against a user of the mattress. The mattress includes an upper (12) and a lower (15) layer of polyurethane foam each of which is laminated to a middle layer (14) of a different polyurethane foam. The upper (12) and lower (15) layers feature a polyurethane foam which is of a higher density than the middle layer (14). The upper (12) and lower (15) layers also include a higher initial softness ratio than the middle layer. The middle layer (14) has higher 5, 25 and 65% indentation load deflection values (ILD) than the corresponding ILD values for the upper (12) and lower (15) layers which is attributable to the firm support provided by the middle layer (14). The middle layer (14) is about twice as thick as the upper (12) and lower (15) layers. The upper and lower layers each include a checkerboard-like upper surface. The combination of layers provides for a reduction in pressure points especially in those areas most susceptible to skin ulcers such as the hip and heel. The combination of layers work together to provide firm, comfortable support while distributing loads both between the individual and the upper layer and between the lower layer and the underlying support structure. (Fig. 1) <IMAGE></p> |
