Hops fabric sofa filler there are three: A, soft polyurethane foam (commonly known as sponge): for the sofa-filled sponge three main categories: conventional sponge is a conventional polyether and TDI as the main generating sponge. It is characterized by good elasticity, softness, breathability; high resilience foam is an active polyphosphate and TDI as the main generating sponge, which is characterized by having excellent mechanical properties, good flexibility. Compression load, flame resistance, good ventilation; chaos hole sponge is a sponge through a hole similar to the sizes of natural seaweed, which is characterized by good elasticity, compression, with excellent cushioning properties when the rebound. B, feather filler: Down do sofa filler, ride comfort, long-term use of small deformation, the disadvantage is slow rebound, cost is also high. Usually in advanced sofa in conjunction with a sponge or suitable as cushion to use. C, synthetic cotton filler: artificial cotton filler made sofa, soft excellent ride comfort, but poor mechanical properties, low compression load, it should only do cushions. Sofa filler selection point: depending on the type of filler is different in the use of very different. Under normal circumstances, sofa cushion filler should use 30 kg / cubic meter or more high resilience foam is more appropriate, in the form they use a piece of foam padding the way, the best form is the use of 30 kg / m or more high resilience foam and chaos hole sponge combined with feather or rayon superimposed combined increase comfort and service life. Clear choice to ask the kind of filler, if the filling is sponge used to understand the density of the sponge, the effect of gravity to feel the rebound cushion, get comfortable ride feeling and so on. Usually with a sponge cushion, national standards 25KG / M3, international standards 35KG / M3. A bottom surface structure, high elastic bandage snake spring structure than the structure, quality is better than low-quality bandage bandage structure, after a long compression still fast rebound, restored to their original, no distortion, no collapse. www.bjops.cn, www.bjops88.com