’00 Mar.
TECHNICAL DATA SHEET
Scotch Brand VHB Acrylic Foam Joining Product
Y-4950(1.14mm) Y-4930 (0.64mm)
1.Product Description:
VHB Acrylic Foam Joining is double coated acrylic foam with acrylic pressure sensitive adhesive on both sides, and has excellent static shear, peel adhesion and resistance to solvents, UV light and elevated temperature.
2. Construction:
3. Advantages:
- High peel strength
- Flexible joining
- Pressure sensitive type adhesive
- High seal performance
- Excellent durability
4. Application Technique
1. Clean up oil, water and dust on the bonding surface.
2. Add pressure using press equipment or steel roller.
3. Initial bond strength decreases at less than 5℃. If initial bond strength is desired, heating VHB and the bonding surface is necessary.
5. Physical Properties:
Product No. / Y-4950 / Y-4930Color / white
Thickness
(mm) / VHB (mm) / 1.14 / 0.64
paper liner / 0.08
Foam density (g/cm3) / 0.75
Foam Tensile strength / (N/cm2) / 118
And elongation / (%) / 600
Operating temperature range (℃) / -20～150℃
Preservation condition / In the room, not expose
direct sun light
Test method
Thickness: Using thickness gauge with presser foot of 5mm diameter.
(JIS Z 0237)
Density: Cut tape specimen 1×3”, measure thickness, determine the mass of
the specimen. Calculate the density from volume and mass.
Foam Tensile strength and elongation:
Cut the specimen to be tested, using the dumbbell cutter (JIS #3).
Remove the liner from the sample. Extend the sample at
500mm/min. Measure the tensile strength and elongation at break.
Operating temperature range:
Impact resistance performance decrease below –20℃.
Degradation of adhesive may be caused for long range using under
Condition above 150℃.
Pressure condition:
Tape roll may change its appearance when it is exposed in High
temperature and humidity for a long time.
6. Electric Properties:
Product No. / Y-4950 / Y-4930 / Test MethodInsulation resistance (MΩ) / 1.4×108 / 1.4×108 / JIS C 2130
Volume resistivity (Ω･cm) / 8.8×1012 / 8.8×1012 / JIS C 2336
Dielectric breckwon voltage (KV/mm) / 10.7 / 10.7 / JIS C 2110
7. Performance:
Y-4950 / Y-493090°Peel Adhesion (N/cm) / 67 / 49
T-Peel Adhesion (N/cm) / 34 / 24
Dynamic Shear Strength
(N/cm2) / RT×72Hr / 99 / 110
65℃×3Hr / 148 / 159
Normal Tensile Strength (N/cm2) / 118 / 142
Test method
90°Peel Adhesion:
Tape between stainless steel and anodized aluminum foil. Roll down
twice in each direction using 10kg steel roller. 72 hours dwell at room
temperature. Testing speed 300 mm/min.
T-Peel Adhesion:
Using anodized aluminum foil. Roll down twice in each direction using
10kg steel roller. 72 hours dwell at room temperature. Testing speed
300 mm/min.
Dynamic Shear Strength:
To stainless steel. Roll down twice in each direction using 10kg steel
roller. 72 hours dwell at room temperature.
Testing speed 300 mm/min.
Normal Tensile Strength:
To stainless steel. Add pressure using 10kg weight for 30 seconds.
72 hours dwell at room temperature. Testing speed 50 mm/min.
8. Dynamic shear strength at each temperature:
Y-4950 / Y-4930Dynamic Shear Strength
(N/cm2) / -30℃ / 138 / 150
0℃ / 393 / 415
23℃ / 99 / 110
50℃ / 59 / 64
75℃ / 37 / 44
125℃ / 10 / 11
Test method
To stainless steel. Roll down twice in each direction using 10kg steel roller.
72 hours dwell at room temperature. Test under condition each temperature at
300 mm/min.
9. 90°Peel Adhesive to each substrate:
90°Peel Adhesion
(N/cm) / Stainless Steel (SUS304) / 67 / 49
Steel (SPCCB) / 67 / 49
Aluminum (A1050P) / 42 / 29
Galvanized Steel / 67 / 49
ABS / 31 / 25
Acrylic / 26 / 20
FRP / 20 / 15
Unplasticized PVC / 37 / 29
Plasticized PVC / 40 / 26
Plasticized PVC (80℃×168Hr) / 2 / 2
Polycarbonate / 35 / 27
Polyacetal / 14 / 11
Plywood / 3 / 3
Plywood + C-100 / 10 / 8
Glass / 33 / 30
10. Solvent Resistance (% Retaining Adhesion):
Toluene / 6 Hr / 103 / 103
24 Hr / 38 / 26
72 Hr / 8 / 9
Ethanol / 6 Hr / 94 / 80
24 Hr / 100 / 92
72 Hr / 43 / 23
Hexane / 6 Hr / 127 / 114
24 Hr / 73 / 48
72 Hr / 39 / 23
Gasoline / 6 Hr / 115 / 116
24 Hr / 46 / 28
72 Hr / 21 / 15
Oil / 6 Hr / 124 / 126
24 Hr / 180 / 145
72 Hr / 152 / 162
Sodium Hydroxide aq.
(pH = 13) / 6 Hr / 71 / 79
24 Hr / 58 / 91
72 Hr / 29 / 95
Hydrochloric acid
(pH = 2) / 6 Hr / 108 / 115
24 Hr / 114 / 114
72 Hr / 148 / 155
Test method : Dynamic shear strength
To stainless steel. Roll down twice each direction using 10kg steel roller.
72 hours dwell at room temperature. Solvent immersion for each hours (6, 24
and 72 hours). Test as soon as removing from solvent.
Testing speed 300 mm/min. Dynamic shear strength compared to control one.
11. Durability (% Adhesion Retardant):
Heat Aging (80℃) / 720 Hr / 265 / 237
1440 Hr / 270 / 242
2160 Hr / 267 / 236
Heat and Humidity Aging
(50℃, 95%RH) / 720 Hr / 74 / 70
1440 Hr / 67 / 59
2160 Hr / 76 / 59
Water Immersion
(23℃ water) / 720 Hr / 97 / 101
1440 Hr / 74 / 87
2160 Hr / 65 / 81
Test method : Dynamic shear strength
To stainless steel. Roll down twice each direction using 10kg steel roller.
72 hours dwell at room temperature. Asing under each condition, then 24 hours
at room temperature. Testing speed 300 mm/min. Dynamic shear strength
compared to control one.
12. Static Shear Strength:
Temperature / Weight / Y-4950 / Y-493023℃ / 500 g/cm2 / 4.0 / 3.6
250 g/cm2 / 2.1 / 1.9
100 g/cm2 / 0.8 / 0.7
50 g/cm2 / 0.3 / 0.2
50℃ / 250 g/cm2 / 2.8 / 2.6
100 g/cm2 / 1.1 / 1.0
50 g/cm2 / 0.5 / 0.4
75℃ / 100 g/cm2 / 1.5 / 1.3
50 g/cm2 / 0.8 / 0.7
100℃ / 50 g/cm2 / 1.0 / 0.9
Test method
To stainless steel. Roll down twice each direction using 10kg steel roller.
72 hours dwell at room temperature. Hanging weight under condition each
temperature. After 1 week dwell, measure shear strain to holding samples.
Important notice to purchaser
All statements, technical information and recommendations herein are based on
tests we believe to be reliable, but the accuracy or completeness there of is not
guaranteed.