The invention discloses an artificial leather manufacturing method adopting TPU (
thermoplastic urethane) to plasticize PVC (
polyvinyl chloride) and reducing use of a
plasticizer. According to the method, 80-90 parts of PVC
powder, 3-5 parts of a stabilizer, 50-60 parts of the
plasticizer, 10-20 parts of TPU, 2-3 parts of a
foaming agent, 5-10 parts of filler and an appropriate quantity of a colorant are mixed uniformly, and an artificial leather product is prepared with a traditional
calendering process. PVC and TPU are all polar macromolecules and have good compatibility; the TPU macromolecules contain both soft segments and hard segments, the elasticity modulus of the TPU macromolecules is between that of plastics and that of rubber, the TPU macromolecules can still keep better elasticity in a relatively wide temperature range and further have good performance of low-
temperature resistance,
solvent resistance,
heat resistance and the like; when the TPU is used for plasticizing PVC, the glass-
transition temperature of a PVC / TPU blended material is reduced remarkably, the
heat resistance is improved, and 30%-40% of the use quantity of a micromolecular
plasticizer can be reduced; TPU adopts the macromolecules, is not easy to transfer and has lasting plasticizing effect; besides, polar groups such as
epoxy groups, ester bonds and the like in the plasticizer and urethane groups in the TPU macromolecules can form a
hydrogen bond or
dipole interaction, and accordingly, the transference resistance of the plasticizer is further improved.