Medical transparent polypropylene material weather-resistant master batch and preparation method thereof

The invention relates to a medical transparent polypropylene material weather-resistant master batch, which comprises the following components by weight: 70-80 parts of polypropylene powder resin; 10-18 parts of a light stabilizer; 2 to 6 parts of a non-alkylphenol antioxidant; 2 to 6 parts of a sorbitol nucleating agent; the non-alkylphenol antioxidant is a compound of a phosphite ester antioxidant and a hydroxylamine antioxidant; the preparation method comprises the following steps: uniformly mixing the powdery light stabilizer, the non-alkylphenol antioxidant and the nucleating agent through a color mixer; adding the polypropylene resin and the mixed powder additive into an extruder; the preparation method comprises the following steps: adding a liquid light stabilizer and a non-alkylphenol antioxidant into a double-screw extruder, and carrying out melt extrusion to obtain master batches; after the weather-resistant master batch is added into a PP product, the yellow index difference YI of the product befo