A comparative study of the fluidized-bed coating of cylindrical metal surfaces with various thermoplastic polymer powders

Leong, K. C., Lu, G. Q. and Rudolph, V. (1999) A comparative study of the fluidized-bed coating of cylindrical metal surfaces with various thermoplastic polymer powders. Journal of Materials Processing Technology, 90 : 354-360.

Author Leong, K. C.
Lu, G. Q.
Rudolph, V.
Title A comparative study of the fluidized-bed coating of cylindrical metal surfaces with various thermoplastic polymer powders
Journal name Journal of Materials Processing Technology   Check publisher's open access policy
Publication date 1999
Sub-type Article
Volume number 90
ISSN 0924-0136
Start page 354
End page 360
Total pages 7
Place of publication Switzerland
Publisher Elsevier
Collection year 1999
Language eng
Subject C1
250101 Chemical Thermodynamics and Energetics
770405 Physical and chemical conditions
Abstract This paper reports the results of an experimental investigation into the fluidized-bed coating of cylindrical metal specimens using two types of thermoplastic powders, Rilsan(R) PA11, a nylon-11 powder produced by Elf Atochem, France and Cotene(TM) 4612, a linear low density polyethylene powder produced by J.R Courtenay (New Zealand). The effects of dipping time, preheat temperature and particle size distribution on coating thickness and surface finish were investigated. Consistent trends in coating thickness growth with dipping time were obtained for both nylon-11 and polyethylene powders with increases in coating thickness with preheat temperature. For the same preheat temperature, the lower melting point of polyethylene results in thicker coatings compared to those of nylon-11. There is a negligible change in the coating thickness for sieved powders compared to that for unsieved powders. A pre-heat temperatures of between 240 degrees C and 300 degrees C is necessary to achieve an acceptable surface finish with both nylon-11 and polyethylene powders. To minimize errors in achieving the desired coating thickness, dipping times shorter than 2 s are not recommended. The use of graphs of coating thickness versus dipping time in combination with the coating surface roughness plots presented in this paper enable the optimal choice of pre-heat temperature and dipping time to achieve acceptable surface finish. (C) 1999 Elsevier Science S.A. All rights reserved.
Keyword Engineering, Industrial
Engineering, Manufacturing
Materials Science, Multidisciplinary
Fluidized-bed Coating
Copper Cylinders
Nylon-11
Polyethylene
Powder Coatings
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Mon, 13 Aug 2007, 11:12:00 EST