VHB
Acrylic Foam Tape 4950P and 4950F
Product Data Sheet
Date : June 2004
Supersedes : November 2003
Product Description
VHB Joining Systems utilise firm acrylic adhesives which have excellent long term
holding power. The peel adhesion and tensile holding power of products in the
VHB family are significantly higher then typical pressure sensitive tape products.
Resistance to solvents, temperature extremes, and U. V. Light make VHB products
suitable for many interior and exterior applications.
Note: The following information and data should be considered representative or typical only and should not be
used for specification purposes.
Physical Properties
Not for specification purposes
4950P 4950F
Adhesive Type
Firm Acrylic A-30
Firm Acrylic A-30
Thickness
(ASTM D-3652)
Tape
Liner
Total
1.10 mm ± 15%
0.08 mm
1.18 mm
1.10 mm
0.05 mm
1.15 mm
Foam Density
800 kg/m³
800 kg/m³
Adhesive Carrier
Acrylic Foam (Closed
Cell)
Acrylic Foam (Closed
Cell)
Release Liner
White Paper printed Red
3M VHB
Red Filmic
Tape Colour
White
White
Shelf Life
24 months from date of
despatch by 3M when
stored in the original
carton at 20°C & 50 %
Relative Humidity
P.O. Box 2196 - 8203 AD Lelystad - Telephone: +31 (0) 320-260261 - Fax: +31 (0) 320-260050 - E-mail: info@van-asperen.nl - Web: www.van-asperen.nl
Date : June 2004
VHB Acrylic Foam Tape 4950P and 4950F
Peel Adhesion to Stainless Steel
90° peel @ room temp, 72 hr dwell,
jaw speed 300mm/min
44N/10mm
Static Shear Strength
Weight held for 10,000 mins to
stainless steel with ½ sq in (3.23 sq
cm) overlap
1500 g @ 20°C
500 g @ 65°C
500 g @ 90°C
Temperature Performance
Max (minutes/hours)
Max Continuous (days/weeks)
150°C
90°C
Performance
Characteristics
Not for specification purposes
Normal Tensile (T-Block)
To Aluminium at room temp, 6.45 sq
cm, jaw speed 50 mm/min
970 kPa
Solvent Resistance No apparent degradation when
exposed to splash testing of most
solvents including gasoline, JP-4 jet
fuel, mineral spirits, motor oil,
ammonia cleaner, acetone, methyl
ethyl ketone. 20 seconds air dry.
UV Light Resistance Excellent
Application Product
Information
Bond strength is dependent upon the amount of adhesive-to-surface contact
developed. Firm application pressure develops better adhesive contact and
thus improving bond strength.
To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified.
Typical surface cleaning solvents are isopropyl alcohol/water mixture (rubbing alcohol) or
heptane. Use proper safety precautions for handling solvents.
It may be necessary to seal or prime some substrates prior to bonding.
a. Most porous or fibred materials (e.g. wood) will require sealing to provide a unified
surface.
b. Some materials (e.g. copper, brass, plasticised vinyl) will require priming or coating to
prevent interaction between adhesive and substrates.
Ideal tape application temperature range is 20 to 40°C. Initial tape application to surfaces at
temperatures below 10°C is not recommended because the adhesive becomes too firm to
adhere readily. However, once properly applied, low temperature holding is generally
satisfactory.
In some cases bond strength can be increased and ultimate bond strength can be achieved
more quickly by exposure of the bond to elevated temperatures (e.g. 65°C) for one hour.
This provides better adhesive wetout on to the substrates.
CAUTION
The following situations must be evaluated thoroughly to determine whether VHB products
are suitable for the intended use.
1. Applications of 4950F which require performance at severe cold temperatures must be
thoroughly evaluated, if the expected use will subject the VHB Joining System fastener to high
impact stresses. For cold temperature applications from 0 to 10°C use 4943.
P.O. Box 2196 - 8203 AD Lelystad - Telephone: +31 (0) 320-260261 - Fax: +31 (0) 320-260050 - E-mail: info@van-asperen.nl - Web: www.van-asperen.nl
Date: June 2004
VHB Acrylic Foam Tape 4950P and
4950F
Applications
VHB Joining Systems are suited for use in many interior and exterior industrial applications.
In many situations, they can replace rivets, spot welds, liquid adhesives, and other
permanent fasteners. Each product in the VHB family has specific strengths. These can
include high tensile, shear and peel adhesion and resistance to solvents, moisture and
plasticiser migration. All VHB tapes should be thoroughly evaluated by the user under actual
use conditions with intended substrates, especially if expected use involved extreme
environmental conditions.
VHB Joining Systems are suitable for bonding a variety of substrates, including sealed
wood, many plastics, composites and metals. Plastics which can be a problem are
polyethylene, polypropylene, teflon, silicones and other low surface energy materials.
Plasticised vinyl bonding is dependent upon the types and concentrations of plasticisers
which can migrate into the adhesives causing a reduction in bond strength; 4945 is most
resistant to plasticiser migration.
Galvanised surfaces are potential problems and should be carefully evaluated.
To prevent corrosion on copper and brass, only lacquer coated material should be used with
VHB Joining Systems.
Thorough evaluations are recommended when bonding is required to any
questionable surface.
Values presented have been determined by standard test methods and are average values not to be used for specification purposes.
Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own
tests to determine their suitability for your applications. This is because 3M cannot accept any responsibility or liability direct or
consequential
for loss or damage caused as a result of our recommendations.
3M Nederland BV
Industriële Tapes & lijmen e-mail: 3mbonding.nl@mmm.com Customer Sevice:
Postbus 193 internet: www.3m.nl/tapes Tel.: (071)5 450 187
2300 AD Leiden www.3m.nl/lijmen Fax: (071)5 450 376
P.O. Box 2196 - 8203 AD Lelystad - Telephone: +31 (0) 320-260261 - Fax: +31 (0) 320-260050 - E-mail: info@van-asperen.nl - Web: www.van-asperen.nl
