ASTM International - ASTM D4441-98
Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
|Publication Date:||10 March 1998|
|ICS Code (Thermoplastic materials):||83.080.20|
1.1 This specification covers aqueous dispersions of polytetrafluoroethyl
1.1.1 The dispersion is stabilized by one or more surfactants. Other non-PTFE materials may be present in total at 5% or less by weight for special purposes.
1.2 This specification may be used to determine if a shipment, lot, or container of PTFE dispersion is suitable for its intended use. It covers only aqueous dispersions of polytetrafluoroethyl
Note 1-Uses for the PTFE dispersion covered by this specification include, but are not limited to, casting of their films, impregnation of mechanical packings and other materials, surface coatings on various substrates, combined impregnation and coating of fibrous materials, and co-coagulation with other materials for subsequent processing into films, sheets, rods, and tubes.
Note 2- Information in this specification is technically equivalent to related information in ISO 12086-1 and ISO 12086-2.
1.3 The values stated in SI units, as detailed in Practice E 380, are to be regarded as the standard.
1.4 The following precautionary caveat pertains only to the test method portions of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary information is given in Notes 5 and 6.