Mattress is an important part of sleep system, and its performance directly affects the comfort of people. The mechanical properties of the sleep system (especially the back support performance) have more influence on the sleep quality than the non mechanical properties (such as heat conduction). The hardness of mattress is an index to evaluate the supporting performance of mattress, and it obviously affects the pressure distribution at the man bed interface and the shape of human spine. However, in addition to the hardness of the mattress, the fit of the mattress is also an important aspect of the mattress support performance. The perfect fit of the mattress to the human body is the premise for the effective support of various points of the spine, and also reflects the high-quality shaping of the mattress. The high-quality shaping of the mattress ensures that all parts of the human body are evenly supported in the sleeping position.
Haida Instrument developed mattress fit and hardness tester according to the mattress standards of T-SZFA 2003-1-2019, T-SZFA 2003-2-2019, QBT 1952.2-2011 and QBT 4839-2015. This tester is the first in China and has all independent intellectual property rights. Its testing mechanism moves with two axes, a set of vertical testing mechanism is driven by an electric cylinder, and its power is driven by a servo motor to ensure the accuracy and reliability of test data, Three sets of laser ranging devices are configured to collect deformation data in real time. The loading device adopts full guide rail guided movement, which is easy to operate, accurate at the loading point, and can operate automatically until the test is completed or the sample is damaged.
The hardness distribution and fitting index (T) of the mattress can be directly evaluated by drawing the distribution map of the hardness and total hardness of the mattress surface layer, core layer and bottom layer on the mattress with contour lines.
The higher the T value is, the better the mattress fits, the better the plasticity, the better the independent support performance of each point, and the mutual interference between each point
The smaller. When the maximum difference among T1, T2 and T3 is greater than 15%, it indicates that the scalability of the mattress fabric composite layer cannot meet the requirements of the independent support performance of the mattress. The mattress fit is divided into five levels according to the fit index:
0% ＜ T ≤ 20%, the fitting degree of mattress is grade 1;
20% ＜ T ≤ 40%, the fitting degree of mattress is level 2;
40% ＜ T ≤ 60%, the fitting degree of mattress is grade 3;
60% ＜ T ≤ 80%, the fitting degree of mattress is Grade 4;
80% ＜ T ≤ 100%, the fitting degree of mattress is Grade 5;
Therefore, when purchasing a mattress, you only need to check the hardness and fit of the mattress to select the mattress you want!
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