Collecting method of PTFE (polytetrafluoroethene) debris

Abstract

The invention relates to a collecting method of PTFE (polytetrafluoroethene) debris. The method comprises the steps as follows: washing a glass plate with an acetone solution, soaking a cotton swab with the acetone solution, and the debris is wiped by the cotton swab to the glass plate and dried through blowing, wherein the dimension of the glass plate is 20 mm*20 mm, the usage amount of the acetone solution is determined by the mass of the debris and generally in a range of 1 ml / mg to 2 ml / mg, and the debris is naturally dried for 3 min-5 min. The collecting method has the advantages that the utilization rate of the original PTFE debris is increased; the morphology, the shape and the size of the original PTFE debris are kept intact and unchanged; the collecting method is lower in cost and simple to operate; and the frictional wear information of the original PTFE debris is kept and the like.

Description

Technical field: [0001] The invention relates to a method for collecting grinding debris, in particular to a method for collecting polytetrafluoroethylene grinding debris. Background technique: [0002] PTFE is a white, odorless, tasteless, non-toxic powder with strong hydrophilicity, self-lubrication, and high wear resistance. Its structure consists of irregular regions (or non-crystalline regions) and 20nm-thick, 0.3μm-wide crystalline thin-layer regions. The crystallization of PTFE is completed alternately by polymer thin layers and irregular regions. The structure of the thin-layer crystalline regions is complete and the overall strength is high. There are a large number of non-crystalline defects in the irregular crystalline regions, and the polymer structure is incomplete. It is easy to break under the action of force, and the adjacent crystalline thin layer regions are staggered along the irregular region, resulting in shear failure of the polymer material, so it has...

AI Technical Summary

Problems solved by technology

However, due to the self-lubricating properties of PTFE, most of the wear debris is transferred to the surface of the mating surface material. The traditional collection method leads to low utilization rate of wear debris generated during the friction process, incomplete morphology, shape change, and more Smaller and more fragmented, which is unfavorable for the study of original wear debris information