3
™
Scotchmate Reclosable Fasteners
SJ3526N and SJ3527N Family
Nylon Hook and Loop
Product Information
Product Description
June, 2006
3M™ Scotchmate™ Reclosable Fasteners offer closure alternatives to zippers, screws, snaps,
hooks, bolts and more. They offer greater design flexibility, faster product assembly, smoother
and cleaner exterior surfaces and improved product performance in many applications. The hook
and loop fasteners consist of two strips of nylon fabric which engage to form a quick fastening
attachment. Simply pull the strips apart by hand to disengage.
The woven hook is covered with flexible J shaped hooks, about 300 hooks per square inch
(46/sq. cm.) protruding up from a woven backing. The woven loop backing is covered with
thousands of soft, pliable napped loops, providing for thousands of openings and closings
(cycles). The hook and loop are preshrunk to insure maximum dimensional stability and flatness.
These Scotchmate reclosable hook and loop fasteners are coated on the backside with a firm
synthetic rubber pressure sensitive adhesive designed to function for indoor applications. This
adhesive is especially suited for attachment to low surface energy substrates such as
polyethylene, polypropylene, etc.
The hook product is available with a marked product splice making splice identification easier,
allowing splice removal if desired. The product number is SJ3526NFSR. These products are
also available with a brown, 83 pound polykraft paper liner. The paper liner allows easier
diecutting of pieces. The hook is available as SJ3526NP and the loop as SJ3527NP. When
shorter lengths are desired for evaulation, prototypes or small jobs a mini-pack containing a
4.9 yards (4.5 meters) roll of each SJ3526N (hook) and SJ3527N (loop) is available as a single
package, MP3526N/27N.
Product Construction
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Fastener Products
Hook
Loop
Hook
Material of Construction
Hook
Loop
Backing
Adhesive
(a)
Hook
Loop
3M™ Scotchmate™ Reclosable Fasteners
SJ3526N MP3526N
SJ3526NP
SJ3527N MP3527N
SJ3527NP
SJ3526NFSR
nylon 6
nylon 6,6
nylon 6
Transparent
Black, White, Beige
3/32" (2.4 mm)
4/32" (3.2 mm)
3/32" (2.4 mm)
4/32" (3.2 mm) for 4" wide
0.013 oz/in
2
(0.058 g/cm
2
)
0.015 oz/in
2
(0.063 g/cm
2
)
White 3.0 mil polyethylene Brown 83# polykraft liner
film with a silicone release
with a silicone release
coating and
coating. No printing.
“3M™ Scotchmate™”
printed in red.
Standard Colors
(b)
Thickness
(c)
max. unmated
Selvedge Edge
(d)
In. (mm) ± 1/32" (0.8 mm)
Weight: oz/in
2
(g/cm
2
) without liner
Hook
Loop
Liner
a) The adhesive may produce a yellow tint to some light colored hook and loop products or adherends.
b) Other fastener colors are available as special orders. 3M recommends the user to evaluate a color sample to see if it
meets their color requirements. See your 3M authorized distributor or 3M representative for a color selection guide,
minimum requirements and lead times.
c) Thickness was measured using a 1/2" pressure foot supporting a 34 gram weight. Actual thickness depends upon
the amount of compressional load on the pieces.
d) See table on page 5 for selvedge edge and extended liner configurations.
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3526N and SJ3527N Family
Nylon Hook and Loop
Typical System
Performance
Characteristics
Note: The following information is not product release requirements, nor product specifications. Rather
this data represent typical performance using standard test methods. This is intended for use as a
guide to assist in selection of 3M™ Scotchmate™ Reclosable Fasteners for further evaluation.
Customer specifications should not be based solely on the data presented in this document.
Unless stated, typical system performance characteristics were measured under controlled laboratory
conditions of 72°F (22°C) and 50% relative humidity. The user should evaluate products in the actual
application to ensure suitable performance for the intended use.
System Performance
(a)
3M™ Scotchmate™ Reclosable Fasteners
SJ3526N Hook
SJ3527N Loop
engaged to
engaged to
SJ3527N Loop
Dual Lock™ SJ3540
(b)
TENSILE (Rigid to Rigid Adherends)
lbs
F
/sq inch (Newtons/cm
2
):
Dynamic Tensile Engagement Strength
< 1.0 (0.69)
< 1.0 (0.69)
Dynamic Tensile Disengagement
(c)
13.5 (9.3)
50.5 (34.8)
Static Tensile Holding Power
Holds 1.1#/in
2
(77.5 grams/cm
2
) for indicated time and temperature
100°F
7,300 minutes
8,500 minutes
120°F
1,000 minutes
2,800 minutes
158°F
300 minutes
200 minutes
100°F/100% RH
4,400 minutes
5,800 minutes
SHEAR (Rigid to Rigid Adherends)
Dynamic Shear (1" x 1" overlap)
(c)
Static Shear Holding Power
100°F
120°F
158°F
100°F/100% RH
INITIAL PEEL AND CLEAVAGE
(c)
“T” Peel Strength (Flexible to Flexible) Ave
90° Peel Strength (Flexible to Rigid) Ave
Cleavage Peel Strength (Rigid to Rigid)
ENGAGED THICKNESS
(d)
(Nominal without liner)
CLOSURE CYCLE LIFE
(e)
SHELF LIFE
Inches (cm)
lbs
F
/sq inch (Newtons/cm
2
):
24.5 (16.9)
93.2 (64.3)
Holds 1.1#/in
2
(77.5 grams/cm
2
) for indicated time and temperature
10,000 minutes
1,000 minutes
400 minutes
10,000 minutes
10,000 minutes
4,300 minutes
400 minutes
10,000 minutes
Pounds/inch width (grams/cm width)
1.7 (300)
6.0 (1,070)
1.5 (270)
4.9 (880)
7.9 (1,400)
31 (5,500)
0.14 (0.36)
5,000
0.20 (0.51)
50
Eighteen months from date of manufacturing when
stored in original packaging at 72°F (21°C)
and 50% relative humidity.
Note: Long Term Static Load:
Conditions such as temperature variations, engagement area, closure pressure and vibrations or
side to side movement after engagement or exposure to prolonged periods of moisture, ultraviolet or other environmental factors
can affect the closure strength and long term static load performance. Reclosable 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 (57.3 sq. cm/kilogram) of static load is suggested as a starting point for such evaluations.
a) System performance tests are determined by measuring the performance of the entire mated reclosable fastener system consisting of
two non-anodized aluminum plates joined together with the indicated fasteners. The “T” peel test only measures the closure performance
per ASTM D5170 and was not adhered to aluminum panels. The 90° peel has one of the mated fasteners attached to a non-anodized
aluminum plate while the other mated fastener is not attached to a adherend and is disengaged at a 90° angle.
b) The use of 3M™ Scotchmate™ Loop Reclosable Fasteners engaged to 3M™ Dual Lock™ Reclosable Fasteners provides increased
strength over standard Scotchmate reclosable fasteners, with a limited number of reclosures compared with Scotchmate systems. Due
to the very high strength of Scotchmate reclosable fasteners mated to Dual Lock reclosable fasteners, extra care should be given to
ensure the maximum bond strength is obtained to the adherends being joined. Failure to obtain bond strengths sufficiently high to the
adherend may cause the fastener’s adhesive to release from the adherend.
c) 3M™ Scotchmate™ Reclosable Fasteners SJ3526N and SJ3527N and SJ3540 are engaged with firm pressure and disengaged, peeled
or cleaved at the rate of 12 inches (305 mm) per minute.
d) The engaged thickness was measured using a 0.5" diameter pressure foot supporting a 34 gram weight. Engaged thickness per given
fastener area will decrease when compressed or increase with no load or when the engaged are separated in tensile.
e) Cycle Life is the number of cycles (openings and closings) that the fastener is subjected to while maintaining 50% or greater of the initial
peel value.
-2-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3526N and SJ3527N Family
Nylon Hook and Loop
Additional
Performance
Characteristics
Solvent Resistance:
The nylon components resist incidental attack by most common
solvents and alkaline solutions. Acid solutions may cause deterioration of the fastener.
The adhesive on 3M™ Scotchmate™ Reclosable Fasteners SJ3526N and SJ3527N
may be affected by many common organic solvents and transportation fluids
(gasoline, motor oil, etc.). If increased solvent resistance is desired the customer is
directed to evaluate 3M™ Scotchmate™ Reclosable Fasteners SJ3571 or SJ3572 or
many of our 3M™ Dual Lock™ Reclosable Fastener Products to determine if the
actual adhesive performance meets the requirements of their application.
Plasticizer Resistance:
The adhesive on Scotchmate reclosable fasteners SJ3526N
and SJ3527N may be affected by plasticizers found in many common flexible vinyl
and other materials, resulting in adhesive softening or adhesion loss with time. These
products are not recommended for adhering to plasticized materials. If plasticizer
resistance is desired then 3M™ Scotchmate™ Reclosable Fasteners SJ3522 or
SJ3523 or many of our Dual Lock reclosable fastener products may be evaluated to
determine if the actual adhesive performance meets the requirement of their
application.
Flammability Resistance:
Scotchmate reclosable fasteners SJ3526N and SJ3527N
will not pass common flammability tests when tested unattached to an adherend. If
you need 3M™ Reclosable Fasteners that meet many of the standard flammability
tests (such as FAR 25.853, FMVSS-302, ASTM E-162, ASTM E-662, BSS-7239 and
others), it is suggested that you refer to the product selection guide 3M™ Flame
Resistant Reclosable Fasteners.
Environmental Effects:
Temperatures down to -20°F (-29°C) increases the typical
closure strengths. The Scotchmate reclosable fasteners SJ3526N and SJ3527N
adhesive is formulated to withstand typical indoor conditions temperature, humidity
and ultraviolet exposure conditions. If your application requires increased
ultraviolet exposure or outdoor performance review the 3M™ Scotchmate™ or
3M™ Dual Lock™ product selection guide to determine products that may meet
your requirements.
Water (Humidity) Resistance:
Closure strength of nylon hook and loop fasteners
decreases after prolonged exposure to water due mainly to water absorption by the
cut nylon ends for hook products. Closure strength is regained when dried. Review
the “3M™ Scotchmate™ Polyester Reclosable Fasteners” product selection guide
(70-0709-3962-7) for Scotchmate reclosable fastener products with greater resistance
of the closure to moisture. Once bonded the adhesive has high resistance to moisture
under typical use conditions.
Volatile Outgassing:
Volatile outgassing, as per ASTM E595, is one important test
in determining the suitability of materials for usage within spacecraft. Generally
products with acrylic or no adhesive have lower volatile outgassing values.
Scotchmate reclosable fasteners SJ3526N and SJ3527N have not been tested and
would not be expected to pass ASTM E595. Products tested at the Goddard Space
Flight Center can be found at the following web site: http://outgassing.nasa.gov/
-3-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3526N and SJ3527N Family
Nylon Hook and Loop
Additional
Performance
Characteristics
(continued)
Sterilization/Autoclaving:
3M™ Scotchmate™ Reclosable Fasteners SJ3526N and
SJ3527N have not been tested for performance after gas or steam sterilization, or
autoclaving.
Washing and Dry Cleaning:
Washing or dry cleaning of these products is not
recommended due to the potential for adhesive softening, that could transfer adhesive
residues to other materials, or reduce long term performance.
Fungus Resistance:
Mil standard 810F, Method 508.5:
Three samples from one lot of Scotchmate
reclosable fasteners SJ3526N and SJ3527N were exposed to five fungal organisms
(Aspergillus
versicolor
– ATCC 11730,
A. flavus
– ATCC 9643,
A. niger
– ATCC
9642,
Penicillium funiculosum
– ATCC 11797, and
Chaetomium globosum
–
ATCC 6205) and gave an average fungal growth rating after 44 days of 2.0 for
Scotchmate reclosable fasteners SJ3526N and 2.7 for Scotchmate reclosable
fasteners SJ3527N.
ASTM G21-96 “Fungal Challenge Test”:
Three samples from one lot of
Scotchmate reclosable fasteners SJ3526N and SJ3527N were exposed to five
fungal organisms (Aspergillus
niger
– ATCC 9642,
Penicillium funiculosum
–
ATCC 11797,
Chaetomium globosum
– ATCC 6205,
Trichoderma virens
ATCC
9645 and
Auerobasidium pullulans
ATCC 15233). Scotchmate reclosable fastener
SJ3526N had an average fungal growth after 7, 14, 21 and 28 days of 2.0, 2.0, 2.3
and 2.3 respectively, whereas Scotchmate reclosable fastener SJ3527N gave an
average rating of 2.3, 2.7, 2.7 and 2.7 for the same time periods.
Static Discharge:
Scotchmate reclosable fasteners SJ3526N and SJ3527N have
not been tested for static charge released during liner removal, closure opening nor
adhesive removal from adherends after attachment of the fastener. If your
application requires use of these fasteners in areas where static discharge is of a
concern, the fasteners should be tested under expected use conditions.
-4-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3526N and SJ3527N Family
Nylon Hook and Loop
Roll Lengths – Yards (Meters)
3M™ Scotchmate™ Reclosable Fasteners
(a),(b)
Standard Sizes
Widths
in. ± 1/16"
(mm) ± 1.6
1/2"
(12.7 mm)
11/16"
(17.5 mm)
5/8"
(15.9 mm)
3/4"
(19 mm)
1"
(25,4 mm)
1-1/4"
(31.8)
1-1/2"
(38.1 mm)
2"
(50.8 mm)
2-1/8"
(54 mm)
4"
(101.6)
Available
(c)
Extended
Liner
(d)
One Edge
One Edge
One Edge
SJ3526N
(Hook)
SJ3527N
(Loop)
MP
3526N/27N
4.9
(4.5)
SJ3526NFSR SJ3526NP
(Hook)
(Hook)
50
(45.7)
100
(91.4)
SJ3527N
(Loop)
100
(91.4)
Selvedge
Edge
(d)
One Edge
One Edge
One Edge
25
50
25
50
(22.8) (45.7) (22.8) (45.7)
BK,
B, W
B
B,
BK,
W
BK
B,
BK,
W
B,
BK,
W
BK
BK,
W
B,
BK,
W
B
B,
BK,
W
BK,
W
BK,
W
B
B,
BK,
W
B,
BK,
W
B,
BK,
W
BK
B,
BK,
W
B,
BK,
W
B
BK,
B,
W
One Edge
One Edge
One Edge
One Edge
BK,
W
BK,
W
W
W
W
Two Edges
Two Edges
Two Edges
Two Edges
W
B, BK,
W
BK, W
B, BK,
W
BK
Two Edges
Two Edges
Two Edges
Two Edges
Two Edges
Two Edges
Fabricated Forms
(e)
See Below for Standard Forms
Cut Pieces
a) 3M™ Scotchmate™ Reclosable Fasteners SJ3526NP and SJ3527NP are the same as Scotchmate reclosable fasteners SJ3526N and
SJ3527N respectively, but with a paper instead of film liner. Scotchmate reclosable fastener SJ3526NFSR is SJ3526N with a marked product
splice making splice identification easier if splice removal is desired. MP3526N/27N is a package containing a single 4.9 yards (4.5 m) roll of
each product for use when smaller quantities are needed.
b) Standard colors are white (W), black (BK) and beige (B). Other colors are available as special orders. 3M recommends the user to evaluate a
color sample to determine if it meets their color requirements. See your local 3M authorized distributor or 3M representative for a color
selection guide, minimum order quantities and lead times.
c) 3M™ Scotchmate™ Reclosable Fasteners SJ3526N, SJ3527N, SJ3526NFSR, SJ3526NP and SJ3527NP come standard on a 3" diameter
fiber core in widths up to 4". The diameter of the side shield is 17.5 inches (44.5 cm) and the width of the roll with the side shield is the product
width plus 1/4". Contact your authorized 3M distributor or 3M representative for details on supplying widths or special sizes not listed above.
d) Selvedge edges and extended liner availability. Other configurations may be possible as a special order, or via a 3M authorized distributor.
e) 3M™ Reclosable Fasteners can be fabricated in many custom shapes and sizes to fit your product design and manufacturing process. Some
standard shapes and sizes are listed below. For others not listed please contact your local 3M authorized converter or 3M representative for
additional options, configurations and ordering information.
Product Number
Fabricated Forms
SJ3526N
SJ3527N
SJ3526N/27N
SJ3526N/27N
5/8" x 5/8" individual cut pieces of black hook.
5/8" x 5/8" individual cut pieces of black loop.
1" x 3" premated samples in black or white.
1" x 6" premated black hook and loop pieces.
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