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Flame Retardant adhesives

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3M Scotch-Weld™ 3748 VO Hot Melt Adhesive
Categories: Polymer; Adhesive

Material Notes: Self-extinguishing version of 3748. Meets UL 1410 requirements

Information provided by 3M

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Physical PropertiesOriginal ValueComments
Density 1.09 g/cc
Viscosity 3300 cP
@Temperature 220 °C
 5000 cP
@Temperature 200 °C
 8500 cP
@Temperature 180 °C
Brookfield Viscosity 5500 cP
@Temperature 191 °C
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 26ASTM D2240
Shear Strength 215 psiFR-24 to FR-4
 220 psiPE to PE
 250 psiPP to PP
 275 psiOn Douglas Fir
 275 psiFirt to Fir
Peel Strength 15.0 plion canvas
 26.0 pliFir, 180°
 27.0 pliPE, 180°
 35.0 pliPP, 180°
 38.0 pliWire Mesh to FR-4, 180°
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 6.00e+17 ohm-cmASTM D257
Surface Resistance 4.50e+17 ohm
Dielectric Constant 2.3
@Frequency 100 - 1.00e+8 Hz
ASTM D149
Dielectric Strength 1400 kV/in
@Thickness 0.279 mm
ASTM D149
Dissipation Factor 0.0010
@Frequency 1000 - 1.00e+8 Hz
ASTM D149
 0.0020
@Frequency 100 Hz
ASTM D149
 
Thermal PropertiesOriginal ValueComments
CTE, linear -3.40 µm/m-°C
@Temperature -40.0 °C
 15.4 µm/m-°C
@Temperature 25.0 °C
Thermal Conductivity 1.92 W/m-K
Flammability, UL94 V-0
Ring & Ball Softening Point 152 °CASTM E28-99

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PMM34090 / 168837

Flame Retardant adhesives

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