| 摘要 |
<p>The artificial leather of the invention comprises a fibrous sheet material having on the surface thereof a coating formed of at least two layers of polyurethane elastomer with the elasticity modulus E of the layer of the polyurethane elastomer adjacent to the fibrous sheet being lower than the elasticity modulus E2, E3 . . . Ep-1 of any of the following layer or layers, and at the same time being lower than the elasticity modulus Ep of the finish layer according to the relation E1<E2<E3< . . . <Ep-1<Ep, under the condition that all values of the elasticity modulus E are in the range of from 12 to 170 MPa. The method of manufacturing the artificial leather according to the invention is characterized in that the reactive polyurethaneprepolymer, containing free isocyanate -NCO groups, preferably in the range of from 2.2 to 3.2 percent by weight, in admixture with an amine hardening agent of the molar ratio of -NCO groups to -NH2 groups of from 1.0:1.0 to 5.0:1.0, preferably from 1.5 to 1.0 to 3.0:1.0, is coated on the fibrous sheet in an amount of 20 to 600 grams per square meter for individual layers, with the combined thickness of the coated layers being in the range from 50 to 2000 g/m2.</p> |
| 申请人 |
VYZKUMNY USTAV KOZEDELNY, GOTTWALDOV, CS |
发明人 |
MUECK, DR.RER.NAT. CAND.SCI., EDUARD, OTROKOVICE, CS;AMBROZ, DIPL.-ING. CAND.SCI., LUDVIK, BRNO, CS;HORAK, DIPL.-ING. CAND.SCI., JOSEF, GOTTWALDOV, CS |
