Strong, high temperature resistance, flame-resistant
Strong yet hand tearable, abrasion resistant, water-resistant, conformable
Fiber
Air permeable, strong enough to hold expanding foams
Aluminum
METAL
BACKING
Copper
Lead
Stainless Steel
Heat and light reflective, moisture and chemical resistant, flame-resistant, outdoor weather resistant, conformable
EMI/RFI shielding
Electrically conductive, acid resistant, high conformability, x-ray opacity
Corrosion resistant
RUBBER
BACKING
Neoprene
Abrasion resistant, die-cuttable
Paper/Polyethylene
Metalized/Polyester
COMBINATION
(LAMINATES)
BACKING
Glass Cloth/PTFE
Glass Cloth/Aluminum
Non‑Woven/Aluminum
Polyethylene Over Cloth
Weather and chemical resistant, hand tearable, stretch resistant
Reflective, decorative
High temperature resistance, high strength
Very high temperature resistance, high strength
High heat and cold resistance
Strong yet hand tearable, abrasion resistant, water resistant and conformable.
2
3M Masking and Specialty Products | www.3M.com/IATD
3M Pressure Sensitive Adhesives
Most of the products in this guide feature a 3M pressure sensitive adhesive that bonds the backing to another surface on contact.
Each adhesive has different characteristics that affect production and end use performance.
RUBBER
ADHESIVE
STANDARD
ACRYLIC
ADHESIVE
Moderate initial bond
Firmer
High surface energy*
Up to 450°F (232°C)
Excellent chemical resistance
Excellent UV resistance
Excellent aging
Permanent
Excellent solvent resistance
MODIFIED
ACRYLIC
ADHESIVE
Bonds to wider variety
than standard acrylic
Softer
Many surfaces
Up to 300°F (149°C)
Good chemical resistance
Moderate UV resistance
Durable
Various
Good solvent resistance
SILICONE
ADHESIVE
High initial bond
Softer
Widest variety of surfaces including
low surface energy materials*
Up to 350°F (177°C)
Fair chemical resistance
Fair UV resistance
Poor aging
Removable
Good solvent resistance
Fair initial bond
Very firm
Fewer surfaces
Up to 600°F (316°C), excellent
low temperature performance
Excellent chemical resistance
Excellent UV resistance
Excellent aging
Removable
Excellent solvent resistance
*
Surface energy
ranges from high to low. To illustrate the concept of surface energy, think of water on the unwaxed hood of a car. The unwaxed hood has high surface energy and
water on the hood flows into puddles. In comparison, a waxed hood has low surface energy and the water beads up rather than flows out. Similar to water, adhesive on a high surface
energy surface flows and “wets out” the surface. “Wetting out” is required to form a strong bond.
As a rule of thumb, the higher the surface energy, the greater the strength of adhesion.
Specially formulated adhesives are available for low surface energy surfaces.
Regardless of surface energy, the substrate must be unified, dry, and clean to maximize adhesive contact.
The following illustrations and surface rankings give you an idea of relative surface energy.
Metal Surfaces (High Surface Energy)
High Surface Energy Plastics (HSE)
Low Surface Energy Plastics (LSE)
11
11
11
mJ/m
2
Surfaces
mJ/m
2
Surfaces
mJ/m
2
Surfaces
mJ/m
2
Surfaces
1103
840
753
526
458
700 –1100
250 –500
Copper
Aluminum
Zinc
Tin
Lead
Stainless Steel
Glass
50
47
46
45
43
43
Polyimide
Industrial Film
Phenolic
Nylon
Alkyd Enamel
Polyester
Epoxy Paint
43
42
42
39
38
38
Polyurethane Paint
ABS
Polycarbonate
PVC Rigid
Modified PPE Resin
Acrylic
37
36
36
33
31
29
28
18
PVA
Polystyrene
Acetal
EVA
Polyethylene
Polypropylene
Polyvinyl Fluoride Film
PTFE Fluoropolymer
Note:
These values are provided as a guide. Formulation modifications can substantially alter surface energies.
Applying firm pressure to the bond increases adhesive flow and contact for more
secure bonding. Time and temperature will typically further increase contact and
adhesion values.
1.
1
Initial Contact (Minimal Contact)
2.
2
After Rubdown (More Contact)
Adhesion Level
Adhesive Surface Contact
Acrylic
Rubber
Silicone
Dwell Time
12
3.
3
After Dwell Time (Excellent Contact)
Adhesive
Bonding Surface
13
Adhesive
Bonding Surface
14
Adhesive
Bonding Surface
15
3M Masking and Specialty Products | November 2016 Edition
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