| 摘要 |
<p>The present invention relates to a method for manufacturing a grommet rubber for vehicle which can solve a whitening problem of a grommet for vehicle by processing, in a specific vulcanization condition, a grommet rubber composition including an ethylene-propylene-diene monomer (EPDM) rubber, a plasticizer, and a vulcanization accelerator at a predetermined mixing ratio. The present invention comprises a first step of manufacturing a mixture by mixing a rubber composition including 100 phr of EPDM rubber, 1-5 phr of vulcanization accelerator, 65-75 phr of plasticizer, 1-2 phr of vulcanizing agent, 160-200 phr of inorganic filler, and 1-10 phr of one or more kinds of additives selected from graphite, molybdenum disulfide, and wax; a second step of manufacturing a molded product by press-molding the mixture at a vulcanization temperature of 190-195°C for 140-180 seconds; and a third step of evaluating the whitening of the molded product by an immersion test method. Accordingly, the grommet rubber for vehicle can solve the whitening problem of the grommet for the vehicle coming into a question in a field due to a superior whitening-resistance, and enhance marketability of the vehicle due to superior mechanical properties.</p> |
