Key Differences Between TPE and TPV Materials and Their Overmolding Applications
Time of issue:2024-08-23
For those familiar with raw materials, it's well-known that TPE and TPV are two commonly used materials in our daily lives. TPE overmolding finds extensive applications in areas such as stationery, sports equipment, and automotive parts. Similarly, TPV is widely utilized in the automotive, electronics, and transportation industries. While these two materials share some similarities, they also exhibit notable differences. Below, we'll delve into the key distinctions between TPE and TPV with PlasticsPro.
Differences Between TPE and TPV Materials:
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Abrasion Resistance: TPV excels over TPE, though high-abrasion-resistant TPEs are also available.
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Resistance to Acids and Alkalis (Mild Ones): TPV outperforms TPE in this aspect.
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Specific Gravity: TPE has a wide range of specific gravities, from 0.88 to 1.3, while TPV generally falls around 0.98 (for reference, water's specific gravity is 1).
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Weather Resistance: TPV is superior to TPE in terms of weather resistance.
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Transparency: TPE surpasses TPV in transparency. Currently, transparent TPV products are not widely available on the market, though it's rumored that some large foreign companies have developed such products.
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Price: Generally, TPV is more expensive than TPE, but specific market conditions may vary.
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Temperature Resistance: TPE withstands temperatures from -60°C to 90°C, while TPV can handle temperatures from -60°C to 130°C.
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Oil Resistance: TPU (excellent) outperforms TPV (moderate), and TPE is not oil-resistant.
Differences in Overmolding Between TPE and TPV:
Understanding the fundamental difference in their composition is crucial: TPE is a blend of SEBS/SBS, PP, naphthenic oil, calcium carbonate, and additives, whereas TPV is an elastomer primarily based on PP/EPDM, dynamically vulcanized. This underlying difference impacts their performance and suitability for various overmolding applications.
By now, you should have a clearer understanding of the key differences between TPE and TPV materials and their distinct characteristics in overmolding processes.
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