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ADHESIVE
FOCUS
Electronic Issue of Adhesive Tech center's
Newsletter
Spring 1997
Volume lll Issue 2
IN THIS ISSUE
Introducing Mameco Sealants
Eliminating Hot Melt Adhesive
Charring
Introducing
MAMECO SEALANTS
Founded in 1913...Mameco International holds
many of the basic patents
for polyurethane composition and is committed
to providing the cutting edge of polyurethane technology...keeping
you ahead in the 21st century.
 Mameco
International manufactures high quality polyurethane
sealants providing excellent performance characteristics
and moving capabilities of industrial applications.
Mameco sealants offer a unique combination
of toughness and long life. They have
sufficent elasticity to compensate for reasonable
movement and will maintain water
tightness over a wide range of adverse conditions.
Mameco offers:
-
Superior Adhesion
-
Excellent water resistance
-
Excellent weathering
-
Choice of properties
-
Choice of packaging
Typical Applications Trailer
repair,
Sealing trailer bodies,
Railcar industry,
Building Maintenance ,
RV Industry, Seals, rivets, bolts etc.
Scroll down for Sealant properties
OEM SEALANT PHYSICAL PROPERTIES
| |
VULKEM® 616 |
VULKEM® 626 |
VULKEM® 636 |
|
Shore A Hardness
|
45-50
|
45-50
|
25-30
|
| 100% Modulus |
175
|
150
|
150
|
| Elongation |
100%
|
220%
|
400%
|
| |
PEEL
|
STRENGTH
|
|
Aluminum
(mill finish) |
15 PLI
|
15 PLI
|
20 PLI
|
Aluminum
(anodized) |
15 PLI
|
18 PLI
|
15 PLI
|
| Steel |
16 PLI
|
19 PLI
|
30 P:LI
|
| Glass |
14 PLI
|
16 PLI
|
30 PLI
|
| |
|
|
|
| TENSILE
STRENGTH |
200 PSI
|
175 PSI
|
200 PSI
|
| TEAR STRENGTH |
180 PLI
|
70 PLI
|
55 PLI
|
| |
|
|
|
| NSF STANDARD |
NO
|
NO
|
APPROVED
|
| USDA APPROVED |
NO
|
APPROVED
|
APPROVED
|
| |
|
|
|
VULKEM® 616
A general purpose sealant suited for the cargo container and truck
trailer body.
It is tough, non brittle and bonds firmly to aluminum, wood or fiberglass.
Prevents water penetration in fillet joints used in flat repairs.
VULKEM® 626
An elastromeric sealant ideal for moving joints. It exhibits excellent
adhesion
characteristics and is widely used in the boating, log home and railcar
industry where a
waterproof environment is critical.
VULKEM® 636
An excellent smooth finish sealant with high gloss properties. It posses
many of the
superior sealing and adhesion properties of Vulkem 616 and 626. In
addition, it has low
modulus properties which makes it well suited for high impact and continous
vibration
environments.
COLORS
Vulkem 616 White, Aluminum, Grey
Vulkem 626 and Vulkem 636
White Aluminum,Grey, Limestone, Bronze,
Dark Tan, Black, Redwood Tan, Almond
PACKAGING
10.03 OZ cARTRIDGES, 5 GALLON PAIL. 55 GALLON
DRUM
ALL VULKEM SEALANTS CAN BE GUNNED OR PUMPED
| TECHNICAL DATA |
VULKEM 640 |
VULKEM 642 |
| VISCOSITY |
5,000-10,000CPS |
25,000-30,000 CPS |
TENSILE STRENGTH
1.9-2.0 Mpa |
270 PSI |
270-290 PSI |
| ELONGATION |
220%-240% |
2205-240% |
| RATE CURE AT 70f |
1/16" per 24 hours |
1/16" per 24 hours |
VULKEM® 640/642 A ONE PART LIQUID POLYURETHANE
SEALANT. It
does not require a primer under most conditions. It provides a durable
waterproofing
coating for a variety of substrates and is recommended for the severest
of environments
offering long lasting, tough waterproof protection!
PACKAGING One gallon cans, 5 gallon
cans, 55 gallon drums
Eliminating
Hot Melt Adhesive Char
INNOVATIVE HOT MELT-ON DEMAND
SYSTEM PROCESS
VIRTUALLY ELIMINATES CHARRING
PROBLEMS
 CHAR...IT
PLUGS NOZZLES, INHIBITS BOND QUALITY, REDUCES PLANT PRODUCTIVITY.
IT’S TROUBLESOME. IT’S PERSISTENT. BUT IT IS NOT INEVITABLE.
As heat is applied to solid adhesive,
complex polymers begin to break down and degrade, and continue to do so
as temperature and time increase. Maintaining adhesives at high temperatures
in the presence of oxygen causes charring. The answer is clear . Control
the heat. Control the presence of oxygen at high adhesive temperatures.
Don’t melt it until you need it.
THE DYNATEC ADVANTAGE
1.Unique
melt-on-demand process virtually eliminates charring problems
2.Specific
models can be expanded rather than replaced.
3.Melt
grids provide higher adhesive delivery rates with less power consumption.
4.Seperate
gear pumps for each output.
5.Precision
metered outputs.
6.No
flushing of system required
 ITW
Dynatec designed the solution accordingly, creating the industry’s only
First/
InFirst/Out Melt-On-Demand System.
It’s unique process that provides controlled gradual heating and
prevents char formation by maintaining three essential conditions...temperature
stability in each melt zone; reduction of heat transfer from one zone to
another and isolation of adhesives at high temperatures from oxygen.
ADHESIVE HOTLINE AT 1-800-323-5158
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