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CN-121991439-A - Aging-resistant rubber sealing ring for washing machine and preparation method thereof

CN121991439ACN 121991439 ACN121991439 ACN 121991439ACN-121991439-A

Abstract

The application relates to the technical field of rubber products, and provides an anti-aging rubber sealing ring for a washing machine and a preparation method thereof, wherein the preparation method comprises the steps of providing ethylene propylene diene monomer rubber, maleic anhydride grafted ethylene propylene diene monomer rubber, white carbon black, a metal soap lubricant and a vulcanizing agent; mixing the components except the vulcanizing agent, adding the vulcanizing agent, thinning out the sheet to obtain a rubber compound, carrying out heat preservation treatment on the rubber compound at 80-90 ℃ for 2-3 hours, cooling to room temperature to obtain a heat-treated rubber compound, extruding the heat-treated rubber compound, and vulcanizing to obtain the rubber sealing ring. By the technical scheme, the ageing resistance of the rubber sealing ring is improved.

Inventors

  • ZHANG WENJIAN
  • LI JING
  • LIU TIANFENG

Assignees

  • 河北合力佳橡塑制品有限公司

Dates

Publication Date
20260508
Application Date
20260325

Claims (10)

  1. 1. The preparation method of the aging-resistant rubber sealing ring for the washing machine is characterized by comprising the following steps of: providing ethylene propylene diene monomer, maleic anhydride grafted ethylene propylene diene monomer, white carbon black, a metal soap lubricant and a vulcanizing agent; Mixing the components except the vulcanizing agent, adding the vulcanizing agent, and thinning out the sheet to obtain a mixed rubber; Performing heat preservation treatment on the rubber compound for 2-3 hours at 80-90 ℃, and cooling to room temperature to obtain the heat-treated rubber compound; extruding and vulcanizing the heat-treated rubber compound to obtain the rubber sealing ring.
  2. 2. The method for preparing the aging-resistant rubber sealing ring for the washing machine, according to claim 1, is characterized in that the grafting rate of the maleic anhydride grafted ethylene propylene diene monomer rubber is 0.8% -1.5%.
  3. 3. The method for preparing the aging-resistant rubber sealing ring for the washing machine, according to claim 1, is characterized in that the ignition decrement of the white carbon black is 4.5% -7% by weight.
  4. 4. The method for preparing an aging-resistant rubber gasket for a washing machine according to claim 1, wherein the metal soap lubricant comprises at least one of zinc stearate and zinc laurate.
  5. 5. The method for preparing the aging-resistant rubber sealing ring for the washing machine according to claim 1, wherein the vulcanizing temperature is 160-180 ℃ and the vulcanizing time is 10-15 min.
  6. 6. The aging-resistant rubber sealing ring for the washing machine is characterized by being prepared by adopting the preparation method of any one of claims 1-5, and comprises, by weight, 100 parts of ethylene propylene diene monomer rubber, 10-20 parts of maleic anhydride grafted ethylene propylene diene monomer rubber, 30-40 parts of white carbon black, 5-8 parts of a metal soap lubricant and 2-4 parts of a vulcanizing agent.
  7. 7. The aging-resistant rubber sealing ring for the washing machine, which is characterized by comprising, by weight, 100 parts of ethylene propylene diene monomer, 12-16 parts of maleic anhydride grafted ethylene propylene diene monomer, 34-36 parts of white carbon black, 5-8 parts of a metal soap lubricant and 2-4 parts of a vulcanizing agent.
  8. 8. The aging-resistant rubber gasket for a washing machine as claimed in claim 6, wherein the vulcanizing agent is a peroxide vulcanizing agent.
  9. 9. The aging-resistant rubber sealing ring for a washing machine according to claim 6, further comprising 3-5 parts of a plasticizer, wherein the plasticizer comprises at least one of dioctyl phthalate, dibutyl phthalate and dioctyl adipate.
  10. 10. The aging-resistant rubber seal ring for a washing machine according to claim 6, further comprising 1-3 parts of an aging inhibitor, wherein the aging inhibitor comprises at least one of an aging inhibitor 4020, an aging inhibitor RD and an aging inhibitor 264.

Description

Aging-resistant rubber sealing ring for washing machine and preparation method thereof Technical Field The application relates to the technical field of rubber products, in particular to an aging-resistant rubber sealing ring for a washing machine and a preparation method thereof. Background The rubber sealing ring of the washing machine needs to bear high-temperature and high-humidity environment periodically for a long time. In the daily washing process, especially in the working modes of heating washing, degerming washing and the like, the rubber sealing ring is continuously contacted with hot water and water vapor, and the ageing process of the rubber sealing ring can be accelerated in the damp-heat environment. The rubber sealing ring is used as a key part of the washing machine, and the ageing resistance of the rubber sealing ring directly determines the long-term use reliability of the whole washing machine. In order to improve the ageing resistance of the rubber sealing ring, two technical modes are mainly adopted in the industry, namely, a mode of combining high-price special rubber with ethylene propylene diene monomer rubber is adopted, so that the ageing resistance of the rubber sealing ring can be improved to a certain extent, but the large-scale application in the household appliance field with strict cost control requirements is difficult to realize due to higher raw material cost, and secondly, the filler is subjected to surface modification treatment, so that the ageing of the rubber is delayed by improving the interface combination property of the filler and a rubber matrix, and the ageing failure of the rubber sealing ring can be delayed to a certain extent in the mode, but the reaction condition of a modification process is required to be accurately controlled, so that the complexity of the preparation process of the rubber sealing ring is increased. Disclosure of Invention The present application is directed to an aging-resistant rubber gasket for a washing machine and a method of making the same that address or at least alleviate one or more of the above-identified and other problems of the prior art. The technical scheme of the application is as follows: the application provides a preparation method of an aging-resistant rubber sealing ring for a washing machine, which comprises the following steps: providing ethylene propylene diene monomer, maleic anhydride grafted ethylene propylene diene monomer, white carbon black, a metal soap lubricant and a vulcanizing agent; Mixing the components except the vulcanizing agent, adding the vulcanizing agent, and thinning out the sheet to obtain a mixed rubber; Performing heat preservation treatment on the rubber compound for 2-3 hours at 80-90 ℃, and cooling to room temperature to obtain the heat-treated rubber compound; extruding and vulcanizing the heat-treated rubber compound to obtain the rubber sealing ring. As a further technical scheme, the grafting rate of the maleic anhydride grafted ethylene propylene diene monomer is 0.8% -1.5%. As a further technical scheme, the ignition decrement of the white carbon black is 4.5% -7% by weight. As a further technical scheme, the metal soap lubricant comprises at least one of zinc stearate and zinc laurate. As a further technical scheme, the vulcanizing temperature is 160-180 ℃ and the vulcanizing time is 10-15 min. The application further provides an anti-aging rubber sealing ring for a washing machine, which is prepared by adopting the preparation method and comprises, by weight, 100 parts of ethylene propylene diene monomer rubber, 10-20 parts of maleic anhydride grafted ethylene propylene diene monomer rubber, 30-40 parts of white carbon black, 5-8 parts of a metal soap lubricant and 2-4 parts of a vulcanizing agent. The rubber sealing ring comprises, by weight, 100 parts of ethylene propylene diene monomer rubber, 12-16 parts of maleic anhydride grafted ethylene propylene diene monomer rubber, 34-36 parts of white carbon black, 5-8 parts of a metal soap lubricant and 2-4 parts of a vulcanizing agent. As a further technical scheme, the vulcanizing agent is a peroxide vulcanizing agent. As a further technical scheme, the rubber sealing ring further comprises 3-5 parts of plasticizer, wherein the plasticizer comprises at least one of dioctyl phthalate, dibutyl phthalate and dioctyl adipate. As a further technical scheme, the rubber sealing ring further comprises 1-3 parts of an anti-aging agent, wherein the anti-aging agent comprises at least one of the anti-aging agent 4020, the anti-aging agent RD and the anti-aging agent 264. The beneficial effects of the application are as follows: Compared with the prior art, the application does not need to use high-price special rubber or carry out complex modification on the filler, and improves the ageing resistance of the rubber sealing ring through a specific heat preservation heat treatment step. Specifically, the heat-insulating treatment can enhance t