How to identify the quality of the sponge (provided by Donghong Sponge Factory, 0769-8186 0358)
The two main technical indicators of sponge, density and rebound index.
1, density: high density of good quality, flexibility and comfort, poor furniture sponge due to insufficient density, either sit up and collapse, or completely collapse after a few months, or feel like sitting on the steel plate Without any flexibility.
The sponge density measurement method is as follows.
Test equipment: a sponge, a glass of water, a measuring cylinder, a balance, sand
Test purpose: The formula used to determine the density of the sponge: Ï = m / V
Test procedure: 1. Place the sponge and sand together, then measure the total mass of the sponge and sand with a balance and record it as M.
2. Remove the sponge and measure the quality of the sand with a balance. Record it as m sand.
3. Calculate the quality of the sponge, that is, m cotton = Mm sand
4. Pour this glass of water into the graduated cylinder and measure the volume of water V0.
5. Put the sponge into the measuring cylinder. When the liquid level of the water in the measuring cylinder no longer changes, measure the volume of water in the measuring cylinder and record it as V1.
6. Calculate the volume of the sponge, that is, V cotton = V0-V1
7. Calculate the density of the sponge using the formula: Ï=m cotton/V cotton=(Mm sand)/(V0-V1)
2, rebound index
Good sponges have good elasticity, quick recovery and are not easy to damage. The poor sponge, after sitting for a year or two, has fallen and is broken.
Generally, the hardness is measured indirectly by the Shore C meter, and the three segments are 70/50/20 degrees. But generally speaking on the spot, it is the most direct!
Under normal circumstances, the cushion of the sofa sponge, the national standard 25kg / m3, the international standard 35kg / m3. At present, the cushion filler of the regular manufacturer sofa generally adopts a high resilience sponge of 30kg/m3 or more, and the form is mostly filled with a whole sponge. The best form is a high resilience sponge and a chaotic sponge of 30kg/m3 or more. Combined with a combination of down or rayon for added comfort and longevity.
When selecting, ask about the type of filler. If the filler is a sponge, you should know the density of the sponge used. Use the gravity to feel the rebound effect of the cushion, and sit on the comfort of sitting feeling.
Business contact number: Miss Wu / 13731313676 QQ
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