Patent ID: 7150775
Filing Date: 2006-12-19
Classification: A61L,B22F,B29C,B29K,B29L,C08B,C08H,C08L,C10M,C10N,D01G

Abstract:
1. A powder metal composition comprising a ferrous metal powder and a modified lubricant consisting essentially of a lubricant powder and comminuted cellulose fibers having an average length less than 70 μm and a diameter in the range from about 1μ to 20μ, the modified lubricant being present in an amount less than 2% by weight of the composition, the mixture having (i) a Hall apparent density numerically no smaller than 10% less than that obtained for the same powder metal mixture made with a conventional lubricant without the cellulose fibers, and (ii) a Hall flow rate which is at least 25 sec/50 g of mixture.