Revere 45-AC2V, Руководство по обслуживанию

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Feb 25/11
7 - 6
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2. PREPARATION OF COATED SURFACES
Polyurethane-proofed surfaces
Caution: VERY IMPORTANT – The heavy duty polyurethane coating on the material
used for the buoyancy chambers/floor must have the surface
contamination completely removed by thoroughly cleaning the coated
surfaces with solvent MEK (Methyl Ethyl Ketone). Petroleum or Toluene
type cleaning solvents are ineffective on this material and must not be
used.
A. The nylon fabric (Part No. 302-001) used for the buoyancy chamber/floor has a heavy duty
polyurethane coating which has been compounded to give a high resistance to abrasion.
B. These polyurethane coated fabrics must be prepared for bonding by thoroughly cleaning the
coated surfaces with the solvent MEK immediately before application of the first coat of
adhesive. The solvent is applied with a lint-free fabric pad, wet but not dripping with the
solvent. Adequate preparation is shown by the development of a matte appearance and a
limited degree of tackiness.
C. After being wiped with MEK, the receptiveness of polyurethane surfaces and
polychloroprene adhesives lessens rapidly. For best results the adhesives must be applied
within 10-20 seconds of the MEK wipe, which should be made at standard room
temperature. The optimum time within which the adhesive must be applied, at any given
temperature, can be found using the experience gained by experimenting with identical
fabrics.
D. Repeated applications of the MEK solvent on a clean polyurethane surface tend to become
less effective. Apply the first coat of adhesive immediately after the first MEK wipe.
E. Surfaces which have been separated should not have the residual adhesive removed unless
it can be easily peeled off.
Note: Surfaces which have previously had a solution applied will not normally
respond well to MEK solvent.