Date on Master's Thesis/Doctoral Dissertation
6-1949
Document Type
Master's Thesis
Degree Name
M. Eng.
Department
Chemical Engineering
Committee Chair
Barnes, W. R.
Committee Co-Chair (if applicable)
Williams, G. C.
Committee Member
Williams, G. C.
Committee Member
Ernst, R. C.
Abstract
The problem of developing suitable materials and techniques for the elimination of hand backing of mats was undertaken. A thermosetting resin of the resorcinol type, ad-mixed with 15 to 25 per cent short-fiber asbestos, was applied to the mats both as a paste and in the form of a partially cured resin sheet. Its use was discontinued since its inherent insulating properties and warpage were found to be undesirable.
After experimenting with several other backing materials and methods, the following procedure was concluded to be feasible:
(1) Spraying sodium silicate solution upon a sheet of blotting paper.
(2) Pressing the glue-coated blotting paper to the mat during the pressing of the mat upon the chase.
(3) Warming to set the glue.
(4) Sanding excess blotting paper off high portion of mat back.
(5) Final drying in "Sta-hi" vacuum driers.
A sanding unit was designed and constructed to remove the backing from the raised portions of the mat.
In an effort to replace the present day dry mat with one requiring no backing, the following materials were chosen and tried as mat substitutes: Aluminum sheet, lead-aluminum laminates, Teflon, ethyl cellulose, resorcinol, and several layers of the moistened, conventional mat.
Recommended Citation
Childs, Robert Roscoe, "Newspaper matrix backing techniques." (1949). Electronic Theses and Dissertations. Paper 2348.
https://doi.org/10.18297/etd/2348
