Evaluation of Lubricity with Polyolefins

 General Characteristics of Fatty Acid Amides

• 1. Estimated mechanism for developing lubricity
• 2. Amounts of fatty acid amide added and amounts of amide on LDPE
• 3. Melting points of fatty acid amides

 Physical and Chemical Properties and Functions of Fatty
 Acid Amides

• 1. Effect of film thickness on coefficient of friction
• 2. Relation between amounts of fatty acid amide added and coefficients of friction

  Regardless of the carbon number, the melting point of saturated fatty acid amides falls in a range of 100 to 110°C. In contrast, the melting point of unsaturated fatty acid amides is significantly affected by the carbon number of such fatty acid amides; their melting points fall in a range of 70 to 85°C, relative to carbon numbers in a range of 18 to 22. Usually, as a lubricant, a fatty acid amide whose carbon number is in a range of 18 to 22 is used.

  • 2-1. Variation in the relation between amounts of fatty acid amide added and coefficients of friction
  • 2.2. Effect of aging temperature on coefficient of friction (LLDPE: erucamide, PP: oleamide)
• 3. Coefficients of friction with polyolefins (high slip grade) available on the market
• 4. Time-dependent change in coefficients of friction with various fatty acid amides
• 5. Selection guide for selecting an optimal fatty acid amide according to intended physical properties