How is the sponge in the wheelchair cushion made?
The main material in wheelchair cushions is a sponge. The methods for making sponges for wheelchair cushions on the market are as follows:
A. Mix the foaming resin, foaming aids, and binder resin (to make the finished product adhesive);
B. Carry out foaming processing. Mix 80 parts of ethylene-vinyl acetate (EVA), 20 parts of APAO PT 3385, 20 parts of azodicarbonamide, 19 parts of CaCO, and 0.6 parts of dicumyl peroxide, and place them in a mold for foaming. And use mechanical force to break the closed cells, you can get a foamed sponge. Its density (d) is 0.028 g/cm, and its 25% compression hardness is 1.9 KPa.
Just like foam, the same material and different manufacturing processes will create different things;
PU sponge mainly includes polyester and polyether type which can be sliced or rolled and can also be processed by composite processing, hot pressing processing, and blasting and opening treatment according to customer requirements. PU sponge is involved in various industries, including the automobile industry, battery industry, cosmetics industry, bust underwear manufacturing industry, and high-end furniture due to its characteristics of heat preservation, heat insulation, sound absorption, shock absorption, flame retardancy, anti-static performance, and good air permeability. Manufacturing etc.