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What kind of sponge density is suitable for producing sofa

Time:2020-04-28  Edit by Sirui Machinery

The method of distinguishing sponges in the industry is usually divided by density. The unit of density of sponges is kg / m³, which is the weight of sponge per cubic meter.


Density is an important indicator of matter. The high density of the sponge means that the gap inside is small, and the mass is also large. For example: 40 density means that the weight of a cubic meter sponge is 40kg, and 50 density is 50kg per cubic meter; generally speaking, sponges with high sponge density have high hardness. Sponges have become super soft and are generally used to make soundproof cotton, sofa cushions, and soft bags. Medium and low sponges are generally used as protective materials.


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The hardness of sponges of the same density is not necessarily the same. The foam density of a sofa cushion is generally around 35, and the mattress is generally around 22. The density range explained by the relevant state departments is: high density ≥45kg / m³, medium density<45kg>18kg / m³, and low density<18kg / m³.


High resilience sponges with high-end sofa cushion density above 30kg / m³ and high-resilience sponges with back cushion density above 25kg / m³.


In order to improve the comfort of sitting and lying, some sponges have been soft-treated on the premise of ensuring that the density is not reduced, and some have added springs in the seat cushions, which have higher resilience and aging resistance.


Under normal circumstances, it is best if the sofa cushion is recessed by about 10cm after the human body sits down. Finally, if the sofa has foam material, it must be filled with cotton or polyester fiber around it to ensure comfort and no deformation.


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