Hard sponge also refers to the degree of hardness within the sponge range. Generally speaking, a hard sponge is about 44-50 degrees (the higher the degree, the harder it will be). The 41 degree sponge is more suitable for arc circle combined with fast attack. Generally speaking, the higher the density of the sponge, the greater the hardness. The soft and hard depth of the sofa foam cushion should be divided according to the density. The density of the general sofa foam cushion is about 35, which is a harder sofa. The density of the sponge pad is greater. The sitting feeling of the hard sponge is relatively softer and more comfortable, and the hand feeling is also very delicate, so it is also very suitable for sofa filling.

 

The hardness of the sofa sponge cushion is determined by the density of the sponge. The density of the more suitable sponge cushion is about 35. Therefore, the density of soft sponge will be relatively lower, generally lower than 35. The soft sponge feels softer and more comfortable, and its elasticity is also very good. If you sit on a sofa made of this material, it fits the human body better, and it is more in line with the comfort needs of modern people. But sitting on the sofa foam cushion that is too soft will have some harm to human health. You must know that the soft foam cushion will affect the spine of the human body.