What is the best density of the sofa sponge

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Furniture sponge: fabric sofa, high-resilience foam sponge.

The density of the seat cushion is more than 30kg cubic meters.

The density of the back pad is more than 25kg cubic meters.

Under normal circumstances, after the human body sits down, the sofa cushion is sunken by about 10 cm for the best rebound rate of more than 60%.

In order to improve the comfort of sitting and lying, the foam is softened without reducing the density. Some have vertical springs inside the cushions, giving the sofa a higher resilience and anti-aging performance.

Density test method.

Test instrument: a sponge, a glass of water, a graduated cylinder, a balance, sand Test purpose: to determine the density of the sponge.

Formula used: =m V

Test Steps:1Place the sponge and sand together, and then measure the total mass of the sponge and sand with a balance, which is denoted as M

2.Take the sponge and measure the mass of the sand with a balance, which is recorded as m sand 3Calculate the mass of the sponge, i.e. m cotton = m-m sand.

4.Pour this cup of water into a graduated cylinder and measure out the volume of water V0

5.Put this sponge into the graduated cylinder, and when the liquid level of water in the graduated cylinder no longer changes, measure the volume of water in the graduated cylinder, and record it as V1

6.Calculate the volume of the sponge, i.e., V cotton = V0-V17Use the formula to calculate the density of the sponge:

= m cotton V cotton = (M-m sand) (V0-V1).

Standard: High resilience sponge, the weight of each cubic meter of sponge reaches more than 25 kg of sponge.

High resilience sponge is a kind of sponge generated by active polyphosphorus and TDI, which is characterized by excellent mechanical properties and good elasticity. Large compression load, flame resistance, good air permeability.

Structure of sponge density:

Sponges are divided into three types: high-density sponge, medium-density sponge, and low-density sponge according to their structure. High-density sponges, with many holes and very full, are often used to make sound-absorbing cotton, sofa cushions, soft bags and other materials.

According to the interpretation of the national customs department, density 25 is high density, density between 24 and 18 is medium density, and density < 18 is low density.

Sofa cushions should be made of high-elastic foam foam with a density of more than 30 kilograms, and back cushions should be made of high-elastic foam foam with a density of more than 25 kilograms of cubic meters. Dongguan Oupin Laoyang sofa cushion S snake spring + spring bag + 30KGS M3 sponge + 40KGS M3 + silk cotton, the armrests are made of 30-43KGS M3 sponge, and the backrest is made of 25-28 KGS M3 sponge. In order to improve the comfort of sitting and lying, some foams are also specially soft on the premise of ensuring that the density is not reduced, so that the sofa has higher resilience and anti-aging performance.

Under normal circumstances, it is best to have a recess of about 10 cm in the sofa cushion after the human body sits down.

The best density of domestic sponges is 50, and more than 50 must be doped with something you don't want to know.

The density of the sofa is not as large as possible, and the cushion is more than 35, in fact, the main thing is the combination of different sponge densities.

That's the key.