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When it comes to PTFE (Polytetrafluoroethylene), there are two main manufacturing processes: skiving and extrusion. These processes result in slightly different characteristics for the final PTFE product. Let's break down the main differences between skived and extruded PTFE.
### Skived PTFE.
Skived PTFE is produced by skiving a block of PTFE material into thin sheets. This process involves slicing the material with a sharp blade at an angle to create a thin film. Skived PTFE tends to have a smoother surface finish compared to extruded PTFE. It also has more flexibility and conformability, making it ideal for applications where a conformable material is required.
### Extruded PTFE.
Extruded PTFE, on the other hand, is produced by pushing molten PTFE through a die to create the desired shape. This process results in a product with a more uniform structure and better mechanical properties compared to skived PTFE. Extruded PTFE typically has a higher tensile strength and better dimensional stability than skived PTFE. It is commonly used in applications where high mechanical strength and chemical resistance are important.
### Key Differences.
1. **Surface Finish:** Skived PTFE has a smoother surface finish compared to extruded PTFE.
2. **Flexibility:** Skived PTFE is more flexible and conformable than extruded PTFE.
3. **Mechanical Properties:** Extruded PTFE has better mechanical properties, such as tensile strength and dimensional stability, than skived PTFE.
4. **Manufacturing Process:** Skived PTFE is produced by slicing a block of material, while extruded PTFE is formed by pushing molten material through a die.
In summary, the main differences between skived and extruded PTFE lie in their surface finish, flexibility, mechanical properties, and manufacturing process. Skived PTFE is preferred for applications requiring a conformable material with a smooth surface finish, while extruded PTFE is ideal for applications where high mechanical strength and chemical resistance are crucial. Both types of PTFE have their own unique characteristics, making them suitable for different applications based on specific requirements.
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