The invention relates to a medical
polyvinyl chloride (PVC) material for gamma-
ray irradiation disinfection and a preparation method thereof. The medical PVC material comprises 100 parts of PVC resin, 40 to 70 parts of a
plasticizer dioctyl
phthalate (DOP), 1.0 to 1.5 parts of a
calcium /
zinc heat stabilizer, 5 to 8 parts of an auxiliary heat stabilizer, 0.3 to 0.5 parts of a yellowing inhibitor, 0.1 to 0.5 parts of an anti-oxidant and 0.5 to 0.8 parts of a
lubricant, wherein the PVC resin is a suspension PVC resin having a
polymerization degree of 2500 to 3000; the
calcium /
zinc heat stabilizer is a complex composed of 50 to 60% of ricinic acid
calcium, 10 to 15% of
zinc octanoate, 10 to 15% of zine
stearate and 10 to 25% of sorbierite; the auxiliary heat stabilizer is epoxidized
linseed oil; the
lubricant is composed of 40 to 60% of
stearic acid and 40 to 60% of
polyethylene wax; the yellowing inhibitor is octadecyl-
dibenzoylmethane; and the anti-oxidant is an anti-oxidant 1076 produced by the Ciba
specialty chemicals Ltd. The medical PVC material solves the problems that after being subjected to
irradiation disinfection, the existing PVC material yellows because of degradation breaking of PVC macromolecules; mechanical properties are reduced; and
ageing is accelerated. The preparation method of the medical PVC material can obviously improve a PVC material anti-
irradiation capability.