| 摘要 |
PURPOSE: Provided is a polypropylene composition for stoppers of food and packing material, which is excellent in extrusion-molding ability, strength, shrinkage rate, and hardness. CONSTITUTION: The polypropylene composition comprises: 98-99wt% of homopolypropylene having a melt index(ASTM D1238) of 5dg/min or less, a xylene molten part of 1-5wt%, a molecular weight distribution of 4.0-7.0; 0.05-1wt% of a nucleator selected from the group consisting of a sorbitol, a benzoate, a talc, and a rosin; 0.001-1wt% of an amide slip agent; 0.001-1wt% of an antistatic agent selected from the group consisting of glycerin monostearate, an amine, and alkyl acid ester; 0.001-1wt% of a neutralizing agent and an antioxidant. |
