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參數(shù)資料
| 型號(hào)： | SRC15ML |
| 英文描述： | SILICONE REMOVABLE COATING |
| 中文描述： | 可摘有機(jī)硅涂層 |
| 文件頁(yè)數(shù)： | 5/6頁(yè) |
| 文件大?。?/td> | 25K |
| 代理商： | SRC15ML |
Technical Data Sheet
ELECTROLUBE Wentworth House, Blakes Road, Wargrave, Berkshire, RG10 8AW, UK
Telephone: +44(0) 118 940 4031/ 3014 Fax: +44(0) 118 940 3084
ISO 9002 Registered Firm. Certificate No. FM 32082
PRODUCT DESCRIPTION:
Silicone Removable Coating
DATE:
03/97
PRODUCT CODE:
SRC
PAGES:
2
PRODUCT DESCRIPTION
SRC
is a silicone conformal coating designed to protect printed circuit boards exposed to high humidity
environments. The coating is specially formulated to be easily removed with most common solvents.
Electrolube Ultrasolve (ULS)
is ideal.
SRC
in bulk may be applied by spraying, dipping or brushing. Thinners are available to maintain the viscos-
ity of the coating. A UV trace is included within the coating to allow easy and reliable post-coating
inspection. The stronger the reflected light, the thicker the coating layer.
CHARACTERISTICS
*
*
*
*
*
*
Good adhesion under high humidity conditions.
Low oxygen permitivity and excellent surface resistivity.
Excellent resistance to mould growth, tropical conditions and ultraviolet light.
Good operating temperature range.
Good dielectric properties, coating thickness typically being 25 microns.
Repairability - easily soldered through without fear of highly toxic gases being produced or totally
removed with Ultrasolve.
APPLICATION
SRC
can be sprayed, dipped or brushed. The thickness of the coating depends on the method of appli-
cation, but a dip coater normally deposits a film thickness of about 25 microns (single coat). Workshop
temperatures of less than 16°C or relative humidities in excess of 75% are unsuitable for the application of
SRC
. All PCBs, being composite materials, absorb moisture. If this is not removed, the conformal coating
may not protect to the required extent. Pre-drying or vacuum desiccation, will remove the moisture.
Cleaning
Boards should be thoroughly cleaned before coating. This is required to ensure that satisfactory adhesion to
the substrate is possible. Also all flux residues must be removed as they may become corrosive if left on
the PCB.
Electrolube
manufacture a range of 100% Ozone Friendly cleaning products. All products
produce results within the Military specification. Please contact
Electrolube
for further information.
Dip Coating
Electrolube
manufacture an automated
Dip Coating Machine (DCM)
which is ideal for applying all of the
Electrolube
Conformal Coatings including
SRC
. Ensure that the coating material in the container has been
agitated thoroughly and has been allowed to stand for at least 2 hours for all the air bubbles to disperse.
SRC Thinners (DCT)
should be used to keep the
SRC
coating at a suitable viscosity for dipping.
DCT
is
added periodically as the solvent evaporates. The viscosity should be checked using a viscosity meter or
"flow cup". The board assemblies should be immersed in the
SRC
dipping tank in the vertical position, or at
an angle as close to the vertical as possible. Connectors should not be immersed in the liquid unless they
are very carefully masked.
Electrolube Peelable Coating Mask (PCM)
is ideal for this application.
Leave submerged for about 1 minute until the air bubbles have dispersed. The board or boards should then
be withdrawn VERY SLOWLY so that an even film covers the surface. After withdrawing, the boards should
be left to drain over the tank until the majority of residual coating has left the surface.
Cont’d...2
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