Comprehensive Methods for Assessing Oil Resistance in TPE Materials
Time of issue:2025-02-11
Title: Testing Method for Oil Resistance of TPE Materials
In daily life, different products have their unique characteristics, and TPE materials are no exception. The water and oil resistance of TPE materials determine their application range. However, it is rarely heard that TPE materials excel in both water and oil resistance; they often perform well in one but not the other. Mastering the testing method for oil resistance of TPE materials can help us better distinguish them.
Testing Method for Oil Resistance of TPE Materials:
- Definition of Oil Resistance Test
The oil resistance test primarily measures the changes in multiple performance indicators (such as volume, hardness, tensile strength, etc.) of TPE materials in different standard reference oils.
- Purpose of the Test
The purpose of the oil resistance test is to guide the normal use of materials in areas where they come into contact with fluid oils.
- Testing Method
(1) Measure the volume, hardness, tensile strength, and other parameters of the sample before immersion in oil.
(2) Immerse the sample in oil for 24 hours, 72 hours, or 7 days (commonly 72 hours). Ensure that the sample is at least 5 mm away from the container and at least 10 mm from the bottom of the liquid surface.
(3) After the immersion test, immediately wipe off any residual oil and test the results promptly using the same methods as mentioned earlier. Record and calculate the percentage change in performance indicators such as volume, hardness, and tensile strength after the oil resistance test.
Generally speaking, TPE materials have varying oil resistance properties (such as to straight-chain alkanes, naphthenes, and aromatics). Typically, TPE-E and TPE-V have better oil resistance than TPES and TPU elastomers. However, since there are few products with strict oil resistance requirements for TPE thermoplastic elastomers, the oil resistance of TPE thermoplastic elastomers may not be a significant concern.
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