When nitrile rubber is used to produce rubber products, proper use of reclaimed rubber can effectively reduce the cost of raw materials. In actual production, the addition of reclaimed rubber will cause the mechanical strength of the rubber to decrease to a certain extent. At this time, the rubber product formula needs to be adjusted appropriately. So how can manufacturers of nitrile rubber products adjust the formula of products containing reclaimed rubber to meet demand? What problems should be paid attention to?
1. Commonly used reclaimed rubber for nitrile rubber products
Nitrile reclaimed rubber retains the basic performance characteristics of nitrile rubber and is the main replacement raw material for nitrile rubber products. It can effectively reduce the cost of raw materials while ensuring the physical properties of nitrile rubber products. In actual production, nitrile reclaimed rubber can be used in oil-resistant rubber products and shock-absorbing materials such as nitrile oil-resistant 2YLYY15 hoses, rubber boots, tapes, seals, and shock-absorbing blocks. When nitrile rubber is used to prepare all kinds of conductive products, appropriate amount of reclaimed tire rubber such as tire tread reclaimed rubber can be used to significantly reduce the cost of raw materials.
2. The amount of reclaimed rubber in nitrile rubber products
When using reclaimed rubber to reduce the raw material cost of nitrile rubber products, the amount of reclaimed rubber is determined according to the mechanical strength of the reclaimed rubber, the rubber content and the specific indicators of the nitrile rubber products. In general, the higher the rubber content, the higher the mechanical strength of the nitrile reclaimed rubber, and the higher the mixing ratio in the nitrile rubber products, which can be used to prepare medium and high-grade nitrile rubber products. Nitrile rubber products with low rubber content or tire reclaimed rubber with an effective rubber hydrocarbon content of about 30% are mixed in less nitrile rubber products.
In actual production, medium and high-grade nitrile rubber products are mixed with 10-30 parts of nitrile reclaimed rubber. The physical properties of the finished product have little change, and the aging resistance is better, the expansion and contraction is smaller, and the size is more stable.
3. Formula of nitrile rubber products containing reclaimed rubber
When reclaimed rubber is blended in nitrile rubber products, increasing the amount of reinforcing fillers can improve the tensile strength and hardness of the rubber products. For example, the amount of high wear-resistant carbon black in the formula of rubber products mixed with about 20 parts of nitrile reclaimed rubber can be appropriate Increase 5-7 copies. Plasticizers in nitrile rubber products can improve the processing performance of the rubber, and at the same time reduce the mechanical strength of the rubber; the use of reclaimed rubber can further improve the processing technology of the rubber, so the amount of plasticizer in the formula can be appropriately reduced, such as two The amount of butyl ester.
The main purpose of adjusting the formula of nitrile rubber products containing reclaimed rubber is to ensure various physical properties and oil resistance of the products. Properly increasing the amount of reinforcing agent and reducing the amount of plasticizer can achieve the purpose of improving the mechanical strength of NBR products. In actual production, manufacturers of nitrile rubber products not only need to adjust the amount of reclaimed rubber and the amount of reinforcing agent and plasticizer, but also need to adjust the vulcanization system, anti-aging system, etc. if necessary. The editor will continue to discuss with you later.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits