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Oil-resistant Modified Material

Updated: 2026-09-19

Overview

Oil-resistant Modified Material refers to engineered polymers or composites chemically treated or blended with additives to withstand exposure to oils, fuels, and lubricants without significant degradation. These materials are critical in applications where conventional polymers would swell, soften, or lose mechanical properties. The modification process typically involves incorporating fillers (e.g., silica, carbon black) or chemical cross-linking agents that reduce oil absorption. Common base polymers include nitrile rubber (NBR), fluoropolymers (e.g., FKM), and specially formulated thermoplastics. The degree of oil resistance is measured through standardized tests like ASTM D471.

Physical and Chemical Properties

Oil-resistant Modified Materials exhibit low swelling rates (typically <10% volume increase) when immersed in oils, as measured by ASTM D471. Their tensile strength retention after oil exposure often exceeds 80% of original values, making them suitable for dynamic sealing applications. Thermal stability ranges from -40°C to +150°C for standard grades, with specialty formulations exceeding 200°C. The materials maintain flexibility across this range, with compression set values below 25% in most cases. Chemical resistance extends to aliphatic and aromatic hydrocarbons, though compatibility with specific fluids should be verified.

Main Applications

The automotive sector accounts for approximately 60% of usage, particularly in fuel system components (O-rings, valve seals) and engine gaskets. Aerospace applications include hydraulic system seals where MIL-PRF-25732 standards apply. Industrial machinery utilizes these materials for oil-lubricated equipment seals, conveyor belts in oily environments, and protective linings for chemical storage. Emerging applications include 3D-printed oil-resistant parts for customized fluid handling systems.

Safety and Storage

Processed materials pose minimal hazards, but raw polymer granules may generate combustible dust during handling. Ensure adequate ventilation when machining or grinding finished products. Storage requires protection from ozone and UV exposure, which can cause surface cracking. Bulk materials should be kept in original packaging with moisture barriers. Shelf life typically exceeds 2 years when stored below 30°C and 50% relative humidity.

B2B Procurement Guide

Specify technical requirements clearly: oil resistance class (e.g., ASTM Oil No. 1, 2, or 3), hardness (Shore A scale), and temperature range. For sealing applications, include compression set and extrusion resistance requirements. Leading manufacturers include DuPont (for high-performance fluoropolymers), Lanxess (for nitrile-based compounds), and regional suppliers offering cost-competitive formulations. MOQs typically start at 500 kg for standard grades, with lead times of 2–6 weeks. Sample testing against actual service fluids is strongly recommended before large orders.

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