The invention discloses a preparation method of
polyurethane synthetic leather for soft-suede high-elasticity leather-imitated sofa furniture. According to the preparation method, a suede
elastic fiber synthetic cloth base with good elasticity and
toughness is adopted, a plush surface is taken as a front surface during wet process
processing, and a knife-scraping and impregnation once forming process is adopted, so that the impregnation volume of
slurry of the cloth base can be increased, the combination between
polyurethane resin and suede
fiber cloth base is relatively tight, and the
bonding strength is relatively high; meanwhile, a buffing
machine is utilized for carrying out buffing-
galling process
processing, so that the flatness and the
bonding strength are relatively high during dry method veneering; soaking and line-
rubbing aftertreatment is carried out. The finished
polyurethane synthetic leather for the leather-imitated sofa furniture is not provided with a wet process layer and is more approximate to leather, surface patterns are more plump, the granular
sensation on the back is strong, the touch feel is fine, flexible and plump, and the leather sense is strong; meanwhile, the polyurethane synthetic leather has the characteristics that the peel strength is high, the
wear resistance is high, the normal-temperature deflection is good, the tear strength is high, the
hydrolysis resistance can reach 3 years, and the
cost performance is very high.