The completely fluorinated polymer PTFE is the most widely used fluoropolymer and based on its unique properties established as an undispensible construction material in modern industries.
The extraordinary properties of PTFE are due to its resistence to most chemicals, its broad service temperature range, the excelent electrical properties, the persisting to embrittlement, the ageing resistance and its high purity.
This technical brochure informs about the quality requirements and test conditions, which are necessary to assess semi – finished goods made from PTFE resins, which are essential for high quality PTFE products.
This brochure replaces in parts respectively augments the brochure „quality requirements, test guidelines and tolerances“ for PTFE products edited in 1993 by the „Gesamtverband Kunststoffverarbeitende Produkte (GKV).
This technical brochure is edited by the Fluoropolymergroup of pro-K and provides the present state of knowledge as by March 2013.
Table of content
1. Field of application
2. Standard specific gravity
2.1 Test method
3. Tensile strength and elongation
3.1 Test method
3.2 Tensile strength and elongation – Minimum requirements
4. Ball hardness H 132/30 and Shore-hardness D
4.1 Test method
5.1 Test method
5.1.1 Stabilized DC-voltage
5.1.2 Requirement (based on experience)
5.1.3 Please note
5.1.4 Indicator for voids
6. Dielectric strength, volume resistivity and surface resistivity
6.1 Test method
6.3 Please note
7. Semi finished goods made of filled PTFE
8. Detection of filler content in PTFE-compounds
9. Deformation under load
9.1 Test method