Minimum Film Forming Temperature (MFFT) 最低成膜温度的定义
Definition
The lowest temperature at which a water-borne latex, emulsion, or adhesive, will uniformly coalesce when laid on a substrate as a thin film. The MFFT is related to the glass transition temperature, Tg, but is not identical.
水性乳胶漆,分散剂,交联剂,等在适宜的温度下,会形成一层均匀的固态薄膜,形成此薄膜的最低温度即称为:最低成膜温度,与最低玻璃体化温度项类似,但不相同。
Determination 测定
The standard test for determining minimum film forming temperature involves using a MFFT Bar, as specified by such standards as ISO 2115 and ASTM D 2354. The design of the Rhopoint™ instrument is based directly on this standard. (Grooved platen for DIN 53787)
最低成膜温度测定仪即按照ISO2115, ASTM D2354标准设计制造,利用了标准温度梯度板进行测定,刻纹的温度梯度板符合DIN 53787标准。