From the performance point of view, nitrile rubber has excellent oil resistance. It can be used to produce oil-resistant rubber sheets to ensure that the product maintains good performance in oil media for a long time; combined with cost considerations, nitrile rubber products are expensive and are produced by using nitrile rubber alone The cost pressure of ordinary oil-resistant rubber sheets is very high, so many rubber product manufacturers choose to add nitrile reclaimed rubber to oil-resistant rubber sheets to reduce the raw material cost of NBR oil-resistant rubber sheets while ensuring the oil resistance of the finished product.
1. The significance of adding nitrile reclaimed rubber to common NBR oil-resistant rubber sheet
Since the nitrile reclaimed rubber has undergone intensive treatment during the production process, it has good fluidity, relatively stable internal molecular structure, and better performance in the plasticizing and mixing process of the rubber. The blended rubber mixed with nitrile reclaimed rubber is mixed It is not easy to stick to the roll or roll off. Compared with nitrile virgin rubber, nitrile reclaimed rubber has better performance in vulcanization 2LLYY106. The vulcanizate of virgin rubber/reclaimed rubber has good vulcanization flatness, quick start of vulcanization, and is not easy to scorch; the size of finished film is more stable, regular, and blended The surface brightness is higher.
The main purpose of using nitrile reclaimed rubber in ordinary nitrile oil-resistant rubber sheets is to reduce costs. In actual production, the addition of nitrile reclaimed rubber can also improve the mixing process and vulcanization process of nitrile rubber.
2. The mixing ratio of nitrile reclaimed rubber when producing ordinary NBR oil-resistant rubber sheets
When mixed with nitrile reclaimed rubber in the production of ordinary nitrile oil-resistant rubber sheet, reasonable control of the amount of reclaimed rubber can ensure that the physical properties of the oil-resistant rubber sheet remain unchanged. Under normal circumstances, the mixing amount of nitrile reclaimed rubber in ordinary NBR oil-resistant rubber sheets is controlled between 30%-50% of the total rubber, which can effectively reduce the cost of raw materials and ensure the performance and life of the finished oil-resistant rubber sheets. . In actual production, if the physical properties of the nitrile oil-resistant rubber sheet are not high or the index of the nitrile reclaimed rubber is high, the amount of reclaimed rubber can be appropriately increased.
3. The relationship between the mixing ratio of nitrile reclaimed rubber in oil-resistant rubber sheet and the amount of compounding agent
When using nitrile reclaimed rubber in NBR oil-resistant rubber sheet to reduce the cost of raw materials, the physical properties of the oil-resistant rubber sheet will vary with the amount of nitrile reclaimed rubber. Under normal circumstances, the amount of plasticizer in the nitrile oil-resistant rubber sheet formulation should increase with the increase in the amount of reclaimed rubber; when you want to improve the mechanical indicators of the nitrile oil-resistant rubber sheet, such as tensile strength, hardness, and tear resistance, The amount of reinforcing agent such as carbon black and white carbon black in the formula can be appropriately increased; the vulcanization system should be appropriately adjusted, and the amount of vulcanizing agent should be increased if necessary.
Reasonable use of nitrile reclaimed rubber in ordinary nitrile oil-resistant rubber sheets can achieve a win-win situation in quality and cost. In actual production, nitrile reclaimed rubber can also be used alone in the production of oil-resistant rubber sheets; or in combination with other polymer materials such as chloroprene rubber and PVC to further improve the overall performance of oil-resistant rubber sheets.
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