Lubricant composition for sewing machine

Abstract

To provide a lubricant composition for a sewing machine having excellent lubricity and to prolong the life of various kinds of sliding members. A lubricant is sealed into a clearance of a bearing surface opposite through the clearance to a sliding surface of a member to be supported which is to be supported such as a needle shaft 7 and a bearing part 8. The lubricant composition for the sewing machine is obtained by compounding a base oil of the lubricant with 0.01-10 wt.% of aluminum oxide having 100-1,000 nm particle diameter and contains 0.1-15 wt.% of one or more kinds of oil-soluble additives selected from an organometallic compound, a boron compound, a phosphorus compound and a sulfur compound. The lubricant composition for the sewing machine may be a grease containing a thickener in addition to the oil-soluble additives. In this case, the amount of the thickener is preferably 10-20 wt.% and the thickener preferably has thixotropy.

Description

technical field [0001] The present invention relates to sewing machine devices using a lubricant composition suitable as a lubricant for sewing machines. Background technique [0002] For the lubrication of the sewing machine device, the user generally adopts the structure of injecting lubricating oil or supplying lubricating oil through a felt containing a soaking agent. The lubricating oil used is almost all vegetable oil or mineral oil, regardless of its durability. Therefore, oiling or maintenance must be performed in short intervals. [0003] As existing documents related to the present invention, there are the following documents: [0004] [Patent Document 1] JP-A-10-113490 [0005] [Patent Document 2] JP-A-2002-45587 [0006] [Patent Document 3] JP-A-8-155173 [0007] [Patent Document 4] JP-A-2001-172658 [0008] The aforementioned Patent Documents 1 and 2 inject commercially available grease into the sliding parts in relative motion for the purpose of reducing ...

AI Technical Summary

Problems solved by technology

In order to improve the sintering resistance, solid lubricants such as molybdenum disulfide and graphite or high-quality ceramics such as boron nitride are infiltrated into the lubricating oil to improve the lubricating performance. TBCHNOSYSTEM CO., LTD), but it cannot achieve higher wear resistance, and it is also a problem to color it black

In addition, Patent Document 4 proposes adding fine particles such as alumina to the lubricant, but does not propose to use it in the gap between the sliding surfaces of the supported members of the sewing machine.

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