3
Dual Lock™R eclosable Fasteners
SJ3 560 (Type 250)*
SJ3 561 (Type 400)
SJ3562 (Type 170)
Product Description 3M™ Dual Lock™ Reclosable Fasteners offer adv anced closure alternatives to
zippers, scre ws, snaps, hooks, bolts and more. They offer greater design flexibility,
faster product assembly, smoother and cleaner exterior surf aces and improved product
performance in many applications. The f asteners consist of continuous polyolefin
strips with polyolefin stems having a mushroom shaped top. The mushroom heads
allo w the fasteners to easily slide over each other allowing positioning of parts before
they are snapped together creating a firm fastening attachment. Simply peel the pieces
apart by hand to disengage.
The clear acrylic adhesi ve combined with the clear backing allows for the substrate
color to sho w through the fastener. The acrylic adhesive is well suited for applications
exposed to high temperatures, humidity or for high surf ace energy materials.
This product construction is especially suited for outdoor applications, where ele vated
temperatures are experienced or the potential for direct exposure to sunlight or ultra-
violet light may occur. Suggested combinations of mated fasteners are Type 170 to
Type 250, Type 170 to Type 400, Type 250 to Type 250, Type 250 to Type 400, or for
a quick grab attachment with high strength but limited cycle life any of the Dual Lock
products can be mated with 3M™ Scotchmate™ Loop Reclosable Fasteners. See the
technical bulletin on attachments (70-0709-3929-6).
*Type 170 (approximately 170 stems per square inch)
Type 250 (approximately 250 stems per square inch)
Type 400 (approximately 400 stems per square inch)
Product Construction
Technical Data December, 2002
Note: The following technical inf ormation and data should be consider ed representati v e
or typical only and should not be used for specification purposes.
Fastener Products Dual Lock SJ3562 Dual Lock SJ3560 Dual Lock SJ3561
(Type 170) (Type 250) (Type 400)
Material of Construction
Stem/Heads Clear Polyprop ylene Clear Polyprop ylene Clear Polyprop ylene
Backing Clear Polypropylene Clear P olypropylene Clear P olypropylene
Adhesive Clear Acrylic Clear Acrylic Clear Acrylic
F oam Tape F oam Tape F oam Tape
Standard Color Clear Clear Clear
Thickness(a) unmated ± 15% 0.14" (3.5 mm) 0.14" (3.5 mm) 0.14" (3.5 mm)
Selvedge Edges None None None
Weight(a) 0.035 oz/in20.037 oz/in20.040 oz/in2
(0.156 g/cm2) (0.161 g/cm2) (0.177 g/cm2)
Liner Clear 4 mil (0.10 mm) thick silicone treated polyolefin
liner printed with 3M Dual Lock in red.
a) All thickness and w eight values are with the liner remov ed.
3M™Dual Lock™R eclosable Fasteners
SJ3560(Type 250) • SJ3561 (Type 400) • SJ3562 (Type 170)
Typical System
Performance
Physical Pr operties
and Performance
Characteristics
Note: The following technical inf ormation and data is intended as a user guide r epresenting
typical performance and should not be used for specif ications.
Unless stated differently, typical performance characteristics were measured under controlled laboratory
conditions of 72°F (22°C) and 50% Relative Humidity to obtain maximum reliability. The user should
evaluate products in the actual application to ensure suitable performance for the intended use.
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System Performance(a)
3M™ Dual Lock™ 3M™ Dual Lock™
Reclosable Fastener Reclosable Fastener 3M™ Scotchmate™
SJ3562 (Type 170) SJ3560 (Type 250) SJ3571 (loop)
engaged to engaged to engaged to
3M™ Dual Lock™ 3M™ Dual Lock™ 3M™ Dual Lock™
Reclosable Fastener Reclosable Fastener Reclosable Fastener
SJ3560 (Type 250) SJ3561 (Type 400) SJ3560 (Type 250)(b)
TENSILE (Rigid to Rigid Substrates) lbsF/sq inch (kNewtons/m2) @ 72°F/50% RH
Dynamic Tensile Engagement Strength 10 (69) 60 (414) <1 (<6.9)
Dynamic Tensile Disengagement(c) 23 (159) 107 (738) 29 (200)
Static Tensile Holding Power Holds minimum 2.2 #/in2(155 grams/cm2)
for indicated time and temperature
100°F/100% RH 10,000 minutes 10,000 minutes 10,000 minutes
200°F 10,000 minutes 10,000 minutes 10,000 minutes
220°F 10,000 minutes 10,000 minutes 10,000 minutes
250°F 3 minutes 3 minutes 300 minutes
SHEAR (Rigid to Rigid Substrates) lbsF/sq inch (kNewtons/m2)
Dynamic Shear (1" x 1" overlap)(c) 11 (76) 70 (483) 112 (772)
Static Shear Holding Power Holds minimum 2.2 #/in2(155 grams/cm2)
for indicated time and temperature
100°F/100% RH 7,200 minutes 10,000 minutes 10,000 minutes
200°F 20,000 minutes 20,000 minutes 20,000 minutes
220°F 20,000 minutes 20,000 minutes 20,000 minutes
250°F 3,500 minutes 3,500 minutes 3,500 minutes
PEEL AND CLEAVAGE(c) Pounds/inch width (grams/cm width)
Cleavage Strength (Rigid to Rigid) 8.3 (1485) 28.5 (5099) 12.4 (2218)
Peel Strength (“T” Peel, Flexible to Flexible) 0.5 (89) 1.7 (304) 2.7 (483)
Peel Strength (90° Peel, Flexible to Rigid) 1.6 (286) 5.4 (984) 4.1 (733)
ENGAGED THICKNESS(d) Inches (mm) ± Tolerance
(Nominal without liner) 0.21 (5.4) ± 15% 0.23 (5.9) ± 15% 0.20 (5.0)
CLOSURE CYCLE LIFE(e) 1,000 1,000 50
SHELF LIFE(f) 24 months 24 months 24 months
Note: Long Term Static Load: Conditions such as temperature variations, engagement area, closure pressure and vibrations or side to
side movement after engagement or prolonged periods of exposure to environmental factors can affect the closure strength and long term
static load performance. Fasteners may slip or creep in the direction of the static load forces when subjected to static loads at temperatures
or weights greater than indicated. The user is responsible for designing the amount of fastening area based upon the specific conditions for
the application. Four square inches of fastening area per pound of static load is suggested as a starting point for such evaluations.
a) The expected system perf ormance of 3M™ Dual Lock™ Reclosable Fasteners are in approximately the follo wing increasing order of
strength: Dual Lock SJ3562 engaged to Dual Lock SJ3560 < (less than) Dual Lock SJ3561 engaged to Dual Lock SJ3562 ≈(approximately
equal to) Dual Lock SJ3560 engaged to Dual Lock SJ3560 < Dual Lock SJ3560 engaged to Dual Lock SJ3561. The combinations of Dual
Lock SJ3561 engaged to Dual Lock SJ3561 and Dual Lock SJ3562 engaged to Dual Lock SJ3562 are not recommended.
b) Scotchmate loop engaged to Dual Lock provides increased strength over standard 3M™ Scotchmate™ Reclosable Fasteners. Due to this
increased strength, extra care should be given to ensure the maximum bond strength is obtained to the substrates being joined. Failure to
obtain bond strengths to the substrate that are sufficiently high may cause the fastener to release from the substrate upon disengagement.
c) Dual Lock SJ3560, SJ3561, SJ3562 and Scotchmate SJ3571 were engaged with firm pressure and disengaged at the rate of 12 inches
(305 mm) per minute.
d) Engaged thickness will decrease if a load is applied or increase if a separation force is applied.
e) Cycle Life is the number of cycles (openings and closings) that the fastener is subjected to while maintaining 50% or greater of the
original tensile values.
f) Shelf life is from date of manufacture when stored in original packaging at 72°F (22°C) and 50% relative humidity.
Additional
Performance
Characteristics
Note: The following technical information and data is intended as a user guide representing
typical performance and should not be used for specif ications.
Solvent Resistance: The polypropylene backing, stems and mushroom top resist attack
by most common solvents and alkaline solutions. The adhesive on 3M™ Dual Lock™
Reclosable Fasteners SJ3560, SJ3561 and SJ3562 resists attack by many common
laboratory solvents and transportation fluids (gasoline, motor oil, etc.). When these
products were subjected to a splash test (20 second submersion, follo wed by a 20 second
air dry for three times) there was no visible de gradation when tested with gasoline,
JP-4 jet fuel, mineral spirits, motor oil, ammonia cleaner, acetone or methyl ethyl ketone.
Additional tests should be conducted by the user to e valuate their solvents and exposure
time expected for the actual application.
Plasticizer Resistance: The adhesi v e on Dual Lock SJ3560, SJ3561 and SJ3562 has
reasonable resistance to plasticizers found in many common flexible vinyls or other
materials containing high le vels of plasticizing materials. A plasticizer resistance test
consists of applying the fastener via it’s adhesive to a plasticized vinyl and subjecting the
combination to 158°F (70°C) for 1 week with no applied load. After this time period there
was no adhesive oozing occurring and peel tests typically show good adhesion to the
substrate. Additional tests should be conducted by the user though to e valuate the
plasticizer resistance for the chosen application, substrates, environmental exposure and
duration expected in the actual application. Other products to ev aluate for plasticizer
resistance are 3M™ Dual Lock™ Reclosable Fastener SJ3550CF and 3M™ Scotchmate™
Reclosable Fasteners SJ3522 and SJ3523.
Flammability Resistance: If you need 3M Reclosable Fasteners that pass many of the
standard flammability tests (such as FAR 25.853, ASTM E-162, ASTM E-662, BSS-7239
and others), it is suggested that you refer to the Flame Resistant Fasteners data page
(70-0707-3992-8).
Environmental Effects: Temperatures down to -20°F (-29°C) increases the typical closure
strengths. These products perform well under long term exposure to sunlight or ultraviolet
radiation. These products have been subjected to 1,000 hours under a Xenon arc
weatherometer (ASTM D2565) without adverse affects. Specific testing under the expected
environmental conditions is recommended.
Water (Humidity) Resistance: Closure strength should not be affected after prolonged
exposure to w ater or humidity. Once bonded to the substrate the adhesiv e has excellent
resistance to moisture under typical use conditions. Exposure to ele vated heat and chlorine
or bromine may compromise the adhesi ve performance to the 3M™ Dual Lock™ fasteners.
Volatile Outgassing: Volatile outgassing, as per ASTM E595, is one important test in
determining the suitability of materials for spacecraft. Generally these products have low
volatile outgassing values. Products tested at the Goddard Space Flight Center can be found
at the follo wing web site: http://epims.gsfc.nasa.gov/og-cgi/sectionb/sectionb html.sh.
Sterilization/Autoclaving: These Dual Lock products hav e not been tested for performance
after sterilization or autoclaving processes. It is recommended that the customer ev aluate the
suitability of the Dual Lock product for these characteristics typical of what is expected for
normal usage.
Washing and Dry Cleaning: The adhesiv e present on these Dual Lock products typically
makes them unsuitable to washing or dry cleaning processes.
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3M™Dual Lock™R eclosable Fasteners
SJ3560(Type 250) • SJ3561 (Type 400) • SJ3562 (Type 170)
- 4 -
Attachment
Techniques The following information is intended to assist the designer considering the use of 3M™
Dual Lock™ Reclosable Fasteners. Final product performance depends on actual
conditions, including the fastener selected, the conditions in which the fastener is applied,
the time and environmental conditions in which it is expected to perform. Because many
of these factors are uniquely within the user’s knowledge and control, it is required that the
user e valuate the 3M product to determine whether it is f it for a particular purpose and
suitable for the user’s method of application and desired end use.
As a general rule, four square inches of fastener area per pound of static load to be
supported is suggested as a starting point for e valuation. More or less area may be needed
depending on specific conditions or end use applications.
There are typically six dif ferent methods for attaching Dual Lock to various surfaces. For
complete details on techniques and options for attaching Dual Lock or Scotchmate, please
see the techincal bulletin on Attaching Scotchmate and Dual Lock (70-0709-3929-6).
The most important technique for attaching Dual Lock SJ3560, SJ3561 and SJ3562 to
v arious substrates is pressure sensitive adhesive attachment.
Pressure Sensitive Adhesi v e attachment: The f asteners and substrate surf aces should
have equilibrated for a minimum of 1 hour at temperatures of 68°F (20°C) or greater before
application. Generally these adhesi v e back ed f asteners should be applied to surf aces that are
smooth, dry and free of oils, mold release agents or other surface contaminants.
3M™Dual Lock™R eclosable Fasteners
SJ3560(Type 250) • SJ3561 (Type 400) • SJ3562 (Type 170)
Available Sizes Standar d Widths(a) Roll Length Dual Lock Dual Lock Dual Lock
in. ± 1/16" (mm) ± 1.6 Yards (Meters) SJ3560 SJ3561 SJ3562
(Type 250) (Type 400) (Type 170)
1/2" (12.7 mm) 50 yds. (45.7 meters) X(b) X
3/4" (19 mm) 50 yds. (45.7 meters) X(b)
1" (25.4 mm) 50 yds. (45.7 meters) X X X
11/2" (38.1 mm) 50 yds . (45.7 meters) X
2" (50.8 mm) 50 yds. (45.7 meters) X
3" (76.2 mm) 50 yds. (45.7 meters) X
4" (101.6 mm) 50 yds. (45.7 meters) X X
6" (152.4 mm) 50 yds. (45.7 meters) X
Fabricated Forms(c) 1" x 1/2"
1" x 1"
1" x 1" (premated)
1" x 11/2" (premated)
1" x 2"
1" x 3"
a) All of the 3M™ Dual Lock™ Reclosable Fastener SJ3560, SJ3561 and SJ3562 products are available on 3"
core. All of these products are supplied with the liner to the edge of the adhesiv e. There are no extended liners
or selvedge edge with an y of the standard products listed above. Contact your 3M authorized distributor or 3M
representative for details on supplying special sizes or configurations .
b) It is not recommended to engage Type 250 to Type 250 (Dual Lock SJ3560 to SJ3560) for widths of 0.75" or
narrower. If these narrow widths are required, it is suggested that any of the following combinations be
evaluated: Dual Lock SJ3560 engaged to Dual Lock SJ3561, Dual Loc k SJ3560 engaged to SJ3562 or Dual
Lock SJ3561 engaged to Dual Lock SJ3562.
c) Reclosable Fasteners can be fabricated in many custom shapes and sizes to fit your product design and
manuf acturing process. Contact your local 3M authorized conv erter or 3M representative f or additional options,
configurations and ordering information.
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Application
Ideas 3M™ Dual Lock™ Reclosable Fasteners SJ3560, SJ3561 and SJ3562 can replace
conventional mechanical f asteners in a wide range of assembly and attachment applications
where reclosability is desired. They provide a firm adhesive bond to a wide variety of
surfaces, including, but not limited to those listed below. Because product performance will
depend on actual conditions within any specific application, it is essential that the user
e valuate the 3M product to determine whether it is f it for a particular material purpose and
suitable for the user’s method of application.
Metals Plastics
Aluminum Steel Acrylic Rigid Vinyl
Not suitable for powder coated paints Polycarbonate Polystyrene
Not suitable for low surface energy plastics
Such as polyethylene or polypropylene
Miscellaneous Materials
Glass Sealed Wood
Gel Coat Finishes
Dual Lock SJ3560, SJ3561 and SJ3562 have shown to be useful for:
Attaching toll tag monitors Equipment access doors
Seat cushions in marine applications Vibration and sound dampening control
Removable medical equipment Attachment of computer accessories
Attachment
Techniques
(continued)
The substrate surface should be cleaned to remo v e any surface contaminants with an
appropriate cleaning method for the customer’s substrate, type and quantity of surface
contaminants that need to be remov ed. Note: Be sure to follow all government regulations
and the manufacturer’s precautions and directions for use when using solvents or other
cleaning methods.
After the substrate has been cleaned and dried, the liner is remov ed from the f astener’s
adhesi v e and without touching the adhesive, the f astener’s adhesi v e is applied to the surf ace
using light finger pressure. The f astener is rolled down, to increase contact of the adhesi ve
with the substrate’s surface, by one of two methods. Extra care must be ex ercised when
rolling do wn 3M™ Dual Lock™ Reclosable Fasteners to prevent bending of the stems which
can compromise the closure strength. The follo wing methods allow adequate pressure to be
applied to the Dual Lock without damaging the stems.
The first method uses a hand roller, with the wheel covered with a Type 170 Dual Lock
reclosable fastener such as 3M™ Dual Lock™ Reclosable Fastener SJ3542. The Dual Lock
cov ered roller is rolled, three times in each direction, over the Dual Lock attached to the
substrate.
The second method consists of engaging a strip of plainback Dual Lock Type 170, such as
3M™ Dual Lock™ Reclosable F asteners SJ3442 or SJ3742 to the previously attached
adhesi v e back ed Dual Lock. A rubber roller, with no Dual Lock on the roller is rolled over
the backside of the plainback material. This will engage the two Dual Lock pieces. After
rolling do wn three times in each direction, the strip of plainback Dual Lock can be remo ved
and used to roll do wn the ne xt piece of Dual Lock in a similar manner.
The pressure-sensiti ve adhesive bonds to the substrate on contact and parts can be handled
immediately. Adhesive bond strength increases with time, pressure and temperature.
A minimum of twenty four hours dwell time is recommended before applying a load or
disengaging assembled parts. Recommended time to achie ve maximum bond strength is
72 hours.
3M™Dual Lock™R eclosable Fasteners
SJ3560(Type 250) • SJ3561 (Type 400) • SJ3562 (Type 170)
MSDS: 3M has not prepared a MSDS for this product which is not subject to the MSDS requirements of
the Occupational Safety and Health Administration’ s Hazard Communication Standard, 29 C.F.R.
1910.1200(b)(6)(v). When used under reasonable conditions or in accordance with the 3M directions for
use, the product should not present a health and safety hazard. However, use or processing of the
product in a manner not in accordance with the directions for use may aff ect its performance and present
potential health and safety hazards.
TSCA: This product is defined as an article under the Toxic Substances Control Act and theref ore, it is
exempt from inventory listing requirements.
Certification/
Recognition
To request additional product information or to arrange for sales assistance, call toll free 1-800-362-3550
or visit www.3M.com/adhesives. Address correspondence to: 3M Industrial Adhesives and Tapes Division,
3M Center, Building 220-7E-01, St. Paul, MN 55144-1000. Our fax number is 651-733-9175. In Canada,
phone: 1-800-364-3577. In Puerto Rico , phone: 1-787-750-3000. In Mexico, phone: 52-70-04-00.
F or Additional
Information
3M MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. User is
responsible for determining whether the 3M product is fit for a particular purpose and suitable for user’s
method of application. 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 the 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 v ariety 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.
Important Notice
If the 3M product is proved to be defective, THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL BE
TO REFUND THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE 3M
PRODUCT. 3M shall not otherwise be liable for loss or damages, whether direct, indirect, special,
incidental, or consequential, regardless of the legal theory asserted, including, but not limited to, contract,
negligence, warr anty, or strict liability.
Limitation of
Remedies and
Liability
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9002 and QS 9000 standards
ISO 9002 QS 9000
3
Industrial Adhesives and Tapes Division
3M Center, Building 220-7E-01
St. Paul, MN 55144-1000
Dual Lock and Scotchmate are
trademarks of 3M.
Printed in U.S .A.
©3M 2002 70-0709-3960-1 (12/02)
Recycled Paper
40% pr e-consumer
10% post-consumer
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3M™Dual Lock™R eclosable Fasteners
SJ3560(Type 250) • SJ3561 (Type 400) • SJ3562 (Type 170)
