Customer information: Changzhou XX Rubber & Plastic Products Factory
Product used: Hongyun 75% nitrile reclaimed rubber
Products manufactured: oil-resistant rubber sheets
Case Background: Jiangsu Changzhou XX Rubber & Plastic Products Factory is a company specializing in the production of rubber sheets, sealing gaskets, and industrial rubber products. Its main products are used in machinery, automotive maintenance, petrochemicals, and other fields. Recently, the client received an order for oil-resistant rubber sheets, mainly used for equipment sealing and gaskets in contact with engine oil, diesel, and general industrial oils. There are certain requirements for the oil resistance, tensile strength, hardness, and dimensional stability of the rubber sheets.
Previously, the manufacturer mainly used nitrile rubber as the main material for producing oil-resistant rubber sheets, but as the raw material price of nitrile rubber rose, production costs kept increasing, compressing the company's profit margins E6LYY626. The customer hoped to find a lower-cost formulation solution without significantly reducing oil resistance and physical mechanical properties. After comparing and sampling various reclaimed rubber products, they ultimately chose Hongyun 75% nitrile reclaimed rubber for oil-resistant rubber production, reducing the amount of some nitrile raw rubber through reasonable formulation design.
Reason for option: Nitrile reclaimed rubber is made from nitrile die head rubber, sub-brand nitrile rubber, or waste nitrile rubber products through crushing, desulfurization, filtration, and refining, retaining the basic properties of nitrile rubber, offering good oil resistance and processing performance, and good compatibility with nitrile rubber; Oil-resistant rubber sheets can reduce nitrile rubber usage and formula costs by adding an appropriate amount of nitrile reclaimed rubber while ensuring basic oil resistance.
Technical personnel adjust the addition ratio of nitrile reclaimed rubber, carbon black usage, plasticizer, and vulcanization system according to the hardness, tensile strength, elongation at break, and oil resistance requirements of the oil-resistant rubber sheet, ensuring the compound maintains appropriate Mooney viscosity and plasticity, thereby improving mixing and rolling performance. Nitrile rubber and nitrile reclaimed rubber are used together to produce oil-resistant rubber sheets. The compound compound is uniform, the calendered film surface is flat, the molded dimensions are stable, and the vulcanized rubber sheet looks good, meeting customers' requirements for ordinary oil-resistant rubber sheets.
Usage Effects: After multiple batches of production and performance testing, oil-resistant rubber sheets made with nitrile reclaimed rubber meet customer requirements in hardness, tensile strength, elongation at break, and oil resistance. After contact with oils such as engine oil and diesel, the volume and appearance changes of the rubber sheets fall within the product requirements, meeting the oil-resistant sealing and gasket requirements in general machinery and industrial scenarios. Compared with previous formulas mainly based on nitrile base rubber, adding an appropriate amount of nitrile reclaimed rubber significantly reduces the amount of original nitrile rubber, effectively lowering overall raw material costs; Compound mixing and rolling processing are smoother, improving production efficiency to some extent.
Using nitrile reclaimed rubber in oil-resistant rubber sheets not only effectively reduces raw material costs while retaining good oil resistance, but also improves the plasticity and processing state of the compound, facilitating mixing, rolling, cutting, and vulcanization molding, thereby enhancing production stability. Manufacturers of oil-resistant rubber sheets can adjust the ratio of raw nitrile rubber to nitrile reclaimed rubber based on the hardness, tensile strength, oil resistance grade, and usage environment, and comprehensively adjust it with carbon black, plasticizers, vulcanizing agents, and accelerators to meet more user needs. This gives companies greater price competitiveness in the market for similar oil-resistant rubber products. ...
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