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BumponTM Protecti v e Prod ucts
Top Hat Design
SJ-6115 • SJ-6125
Product Description SJ-6115 and SJ-6125 Bumpon products are pressure-sensitive adhesive-backed
polyurethane products that can be used as feet, stops, spacers, and protectors in many
applications.
Advantages of
Top Hat Design • Ideal for many permanent applications
• Virtually impossible to remove when attached in recess cavity
• Extremely difficult to remove when not attached in recess cavity
Technical Data November 12, 1998
Supersedes October 1, 1998
Product SJ-6115 SJ-6125
Crown Shape cylindrical hemisphere
Color black black
Pad Form, matrix 5 x 8 5 x 8
Dimensions
A - Diameter of Brim, inches (mm) 0.625 (15.9) 0.625 (15.9)
B - Height of Brim, inches (mm) 0.093 (2.36) 0.093 (2.36)
C - Total Height, inches (mm) 0.187 (4.75) 0.250 (6.35)
Dimension Tolerances - Diameter ± 0.005 inches (± 0.13 mm), Height ± 0.015 inches (± 0.38 mm)
measured without the adhesive liner.
A
Brim
BC
A
Brim
BC
Top Hat Design
Product Selection
Considerations
The point of contact provides either a large contact area or a very small (point)
contact area depending on the shape of the Crown of the Bumpon product.
Cylindrical Crown Hemisphere Crown
• Increased load capacity. • Increased sound dampening.
• Better wear resistance. • Increased energy absorption.
Point of Contact Point of Contact
FOD #1542
page 1 of 6
3MTM BumponTM Protective Pr odu cts
Top Hat Design
SJ-6115 • SJ-6125
Product Construction Elastomer polyurethane
Adhesive* synthetic rubber (R-25)
*Synthetic Rubber (R-25) – This very high tack adhesive system provides excellent initial
adhesion and has the capability of providing excellent adhesion to a wide variety of surfaces
including many low surface energy surfaces such as polypropylene and polyethylene.
Property Test Method 6100 Series Product
Hardness, Shore A ASTM-D-2240 70
Approximate Density, lb./ft.380
(gm/cm3)(1.3)
Resilience, % ASTM-D-2632 28-34
(0.125 in. sample)
Kinetic Coefficient of Friction* ASTM-D-1894
Stainless Steel > 1
Glass > 1
Formica®laminate 0.9 - 1.4
Wood 0.9 - 1.4
*Two important laws of friction applicable to Bumpon rollstock are: (1) Friction is independent of
the area of contact between solids and (2) Friction is proportional to the load between solid
surfaces. Thus, if the load (weight) is doubled, the force required is to cause surface sliding is
also doubled. This is expressed mathematically as follows:
Sliding force = (kinetic coefficient of friction) x (weight)
Abrasion Resistance ASTM-C-501 1.7 - 1.9
Taber H 18, 1 kg, g/1000 cycles
Tensile lb./in.2ASTM-D-412, Die A 600
(kPa) (4140)
Elongation, % ASTM-D-412, Die A 100
Dielectric Strength, volts/mil ASTM-D-1000 200
Stain Resistance 3M - 24 hrs. @ 158°F against no staining
white paint, 7 days exposed UV observed
Solvent and 3M - 24 hr. immersion
Fuel Resistance 5% Detergent in water no apparent effect
25% Ammonia in water no apparent effect
Bleach no apparent effect
Hydrochloric Acid no apparent effect
(1 Normal Solution)
Diesel Fuel no apparent effect
Auto Oil no apparent effect
Isopropyl Alcohol slight effect (swelling)
Heptane slight effect (swelling)
Toluol considerable effect (swelling)
Lacquer Thinner considerable effect (swelling)
Flammability Listing UL-94HB Pass; UL recognized
(color black only)
Typical Physical
Properties Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
FOD #1542
page 2 of 6
3MTM BumponTM Protective Pr odu cts
Top Hat Design
SJ-6115 • SJ-6125
SJ-6115
Bumpon 5000 Series 5300 Series SJ-6125
product 5500 Series 5400 Series 6100 Series
Adhesive Natural Rubber Acrylic Synthetic Rubber
R-30 A-20 R-25
Adhesion (Peel)
Low Surface Energy Good Poor Excellent
High Surface Energy Good Good Excellent
Static Shear
75°F Excellent Excellent Excellent
120°F Fair Excellent Good
158°F Poor Excellent Fair
Impact Resistance
Low Surface Energy Excellent Poor Good
High Surface Energy Excellent Good Good
Dynamic Shear Good Excellent Good
Initial Adhesion
Low Surface Energy Good Poor Excellent
High Surface Energy Good Fair Excellent
Adhesion Buildup Some Gradual Some
Solvent Resistance Good Excellent Good
Age Life Good Excellent Good
Relative Adhesive
Performance
Characteristics
The following table provides relative adhesive performance characteristics of the
synthetic rubber (R-25) adhesive system used in the construction of SJ-6115 and SJ-6125
Bumpon products in comparison to the standard R-30 and A-20 Bumpon adhesive
systems used in the construction of the 5000, 5500, 5300, and 5400 Series Bumpon
Application To obtain maximum adhesion, surfaces must be unified, dry, and free of contaminants.
Clean surfaces with low strength solvents such as isopropyl alcohol (rubbing alcohol)
or heptane.* Apply firm pressure to help increase the contact of the adhesive with the
substrate. Allow time (dwell) to increase adhesion. Application Temperature: +40°F
(5°C) to 125°F (52°C).
*Note: Be sur e to follow the manufacturer’s precautions and directions for use
when using solvents.
Service Temperature -30°F (-34°C) to 150°F (66°C); 225°F (107°C) intermittent exposure.
Environmental
Performance Bumpon products are intended for interior applications where resilience and other
physical properties will remain unchanged. Exposure to UV light for extended periods
may cause slight discoloration or yellowing. Bumpon products may be used outdoors
in a protected area with possible discoloration and chalking. Simultaneous exposure to
high humidity and temperature may degrade (soften) the product composition.
Shelf Life Shelf life is 18 months from date of manufacture when stored in original cartons at
60-80°F (15-27°C) and 40-50% relative humidity.
FOD #1542
page 3 of 6
3MTM BumponTM Protectiv e Produ cts
Top Hat Design
SJ-6115 • SJ-6125
Adhesive Stress –
Top Hat Design versus
Standard Design
Top Hat
Design
Tensile Cleavage
Adhesive Stress…
Bumpon product shown in recess cavity
Top Hat Design versus Standard Design – Note from the diagram that the adhesive stress on the
Top Hat design is a combination of tensile and cleavage versus the adhesive stress on the
standard design which is a combination of cleavage and peel. As a result of the Top Hat design
which decreases leverage, more of the adhesive is contributing to the overall strength at one time.
Bumpon product shown in recess cavity
Standard
Design
Adhesive Stress…
PeelCleavage
Adhesive Stress - Types and Definitions
Tensile: Forces are perpendicular to the bond plane. Stress is distributed over the
entire bond area. All the adhesive contributes to the bond strength.
Cleavage: Forces are concentrated at the edge of the bond. Not all the bond area is
contributing to the overall strength at one time.
Peel: Forces are confined to the edge of the bond. At least one surface is flexible.
Even less adhesive contributes to the bond strength than in cleavage.
Shear: Forces are parallel to the bond plane. As with tensile, stress is distributed
over the entire bond area. Shear is typically not a factor when Bumpon
products are attached in a recess cavity.
Benefits of Providing
Recess • Improves adhesive performance – shear strength and impact absorption.
• Provides neat appearance.
• Provides target area for Bumpon product during production.
• Provides uniform location.
RECESS - donut type RECESS - concave type
To obtain best results with the Top Hat Design Products, the depth of the recess cavity should be equal to or
slightly deeper than the height of the brim of the Bumpon product.
FOD #1542
page 4 of 6
3MTM BumponTM Protective Pr odu cts
Top Hat Design
SJ-6115 • SJ-6125
Compression Force
Deflection Curves
50
40
30
20
10
0020 40 60 80 100
SJ-6115
Product SJ-6125
Product
Deflection, mils
Load, lbs.
Load Tolerance The recommended maximum loads which SJ-6115 and SJ-6125
Bumpon products will support under a continuous load are 15 lbs.
and 10 lbs., respectively, per Bumpon product.
Custom Top Hat
Design Products
through the
Design-A-Bump
Program
Custom Shapes 3M can customize Top Hat Design Products for your specific
requirements.
Top Hat Design If the product is placed in a recessed cavity:
Custom Shape • The depth of the recess cavity should be equal to or
slightly Suggestions deeper than the height of the brim of the Bumpon product.
• The base diameter of the crown should be approximately
60-80% of the diameter of the brim of the Bumpon product.
Custom Colors 3M can match most colors to your specifications.
Top Hat Design Dimension tolerances for Top Hat Design Products are
Dimension Tolerances as follows:
ADiameter of Brim, inches (mm) ± 0.005 (0.13)
BHeight of Brim, inches (mm) ± 0.015 (0.38)
CHeight of Crown, inches (mm) ± 0.005 (0.13)
DTotal Height, inches (mm) ± 0.015 (0.38)
Note: Custom Design-A-Bump products may require a qualifying minimum order
quantity and a one-time set-up charge. Call your local 3M Industrial Tape and
Specialties Division Sales Representative for more information about
capabilities and special requirements of the Design-A-Bump Program.
A
B
CD
Brim Crown
FOD #1542
page 5 of 6
3MTM BumponTM Protective Pr odu cts
Top Hat Design
SJ-6115 • SJ-6125
FOD #1542
page 6 of 6
Formica is a trademark of Formica
Corporation.
Bumpon is a trademark of 3M.
©3M 1998 70-0709-1084-2
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Industrial Tape and Specialties Division
3M Center, Building 220-7W-03
St. Paul, MN 55144-1000
USA
1 800 362 3550
1 800 223 7427 Fax On Demand
www.3M.com
Except where prohibited by law, 3M will not be liable for any loss or damage arising form the 3M product,
whether direct, indirect, special, incidental, or consequential, regardless of the legal theory asserted,
including contract, warranty, negligence, or strict liability.
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and Liability
The 3M product will be free from defects in material and manufacture for a period of one (1) year
form the date of manufacture. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS,
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY ARISING OUT OF
A COURSE OF DEALING, CUSTOM, OR USAGE OF TRADE. User is responsible for
determining whether the 3M product is fit for a particular purpose and suitable for user’s method
of application. If the 3M product is defective within the warranty period stated above, your
exclusive remedy and 3M’s sole obligation shall be, at 3M’s option, to replace or repair the 3M
product or refund the purchase price of the 3M product.
Warranty and
Limited Remedy
The technical information and data, recommendations, and other statements provided are based on tests
or experience which 3M believes to be reliable, but the accuracy or completeness of such information is
not guaranteed.
Technical Information
and Data
Please remember that many factors can affect the use and performance of a 3M product in a particular
application. The materials to be bonded with the product, the surface preparation of those materials, the
product selected for use, the conditions in which th product is used, and the time and environmental
conditions in which the product is expected to perform are among the many factors that can affect the use
and performance of a 3M product. Given the variety of factors that can affect the use and performance of
a 3M product, some of which are uniquely within the user’s knowledge and control, it is essential that the
user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the
user’ s method of application.
Product Use
