Datasheet

3
Scotch-Weld
™
3748 Adhesive
Product Data Sheet
Updated : April 2008
Supersedes : March 1996
Product Description
Scotch-Weld Adhesive 3748 is a tough, flexible hot melt adhesive which exhibits excellent
low temperature thermal shock properties with good heat resistance.
It shows high peel adhesion to many substrates especially normally hard to bond materials
such as polypropylene and polyethylene.
3748 also exhibits excellent electrical and non-corrosive properties.
Physical Properties
Not for specification purposes
Base
Polyolefin
Colour
Off-White
Viscosity cP
1
at 160°C - 12500
at 180°C - 6500
at 200°C - 4000
Temperature Control
Setting
4
FDA Accepted
2
Yes
Sizes Available
26 x 73 mm for the Scotch-Weld Air Powered Applicator.
15 x 203 mm for the Scotch-Weld Touch Control Quadrack
Applicator.
15 x 48 mm for the Scotch-Weld Touch Control Applicator.
Shelf Life
12 months from date of despatch by 3M when stored in the
original carton at 21°C (70°F) & 50 % Relative Humidity
1 Brookfield Thermosel Viscometer.
2 FDA Reg. 175.105 (adhesives) CFR Title 21.
Performance
Characteristics
Not for specification purposes
Ball and Ring Softening
Point
3
145 °C
Heat Resistance
80°C
Tensile Strength at
22°C
2.6 MPa
Elongation
1100 %
Bonding Range 3mm
bead
4
45 seconds
3 ASTM E-28-6-7.
4 3mm semi circular bead, Douglas Fir to Douglas Fir.