3
™
Scotchmate Reclosable Fasteners
SJ3522 and SJ3523
Nylon Hook and Loop
Plasticizer resistant adhesive
Product Information
April, 2006
Product Description
3M™ Scotchmate™ Reclosable Fasteners offer advanced 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 small, stiff hooks, about 300 per square inch
(46/sq. cm.). The woven loop 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 plasticizer resistant acrylic pressure sensitive adhesive. This adhesive is
especially suited for attachment to flexible vinyl and other plasticized materials.
Product Construction
Note: The following technical information and data should be considered representative
or typical only and should not be used solely for setting specifications.
3M™ Scotchmate™ Reclosable Fasteners
SJ3522 (Hook)
SJ3523 (Loop)
Material of Construction
Fastener
Backing
Adhesive
Standard Colors
(a)
Thickness
(b)
max. unmated
Selvedge Edge
(c)
In. (mm) ± 1/32" (0.8 mm)
Weight oz/in
2
(g/cm
2
)
without liner
Liner
nylon 6
nylon 6,6
nylon 6
Transparent clear acrylic
Black and White
3/32" (2.4 mm)
4/32" (3.2 mm)
3/32" (2.4 mm)
4/32" (3.2 mm) for 4" wide
0.015 oz/in
2
(0.063 g/cm
2
)
0.014 oz/in
2
(0.059 g/cm
2
)
Clear, non-printed, polyethylene film (3.5 mil)
a) Other colors are available as special orders. 3M recommends the user evaluate a color sample to
see if it meets their color and expected use requirements. See your 3M authorized distributor or 3M
representative for color selection guide and minimum requirements.
b) Thickness was measured using a 1/2" pressure foot supporting a 34 gram weight. Actual thickness
will decrease when a load is applied, compressing the product, or will increase if there is no load, or
a load is removed.
c) See table on page 5 for selvedge edge and extended liner configurations available for various
product widths.
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3522 and SJ3523
Nylon Hook and Loop
Plasticizer resistant adhesive
Typical System
Performance
Properties and
Characteristics
(a)
Note: The following information is not product release requirements, nor product specification limits.
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
3M™ Scotchmate™ Reclosable Fasteners
SJ3522 Hook
SJ3523 Loop
engaged to
engaged to
SJ3523 Loop
Dual Lock™ SJ3560
(b)
TENSILE (Rigid to Rigid Substrates)
lbs
F
/sq inch (Newtons/cm
2
):
Dynamic Tensile Engagement Strength
< 1.0 (0.69)
< 1.0 (0.69)
(c)
16.5 (11.4)
49.1 (33.9)
Dynamic Tensile Disengagement
Holds 1.1#/in
2
(77.5 grams/cm
2
) for indicated time and temperature
Static Tensile Holding Strength
120°F (49°C)
4,600 minutes
5,000 minutes
158°F (70°C)
600 minutes
1,000 minutes
200°F (93°C)
150 minutes
50 minutes
100°F/100% RH (38°C/100% RH)
7,000 minutes
5,750 minutes
SHEAR (Rigid to Rigid Substrates)
lbs
F
/sq inch (Newtons/cm
2
):
30.7 (21.1)
105 (72.5)
Dynamic Shear (1" x 1" overlap)
(c)
2
2
Holds 1.1#/in (77.5 grams/cm ) for indicated time and temperature
Static Shear Holding Strength
120°F (49°C)
10,000 minutes
10,000 minutes
158°F (70°C)
9,000 minutes
6,000 minutes
200°F (93°C)
600 minutes
600 minutes
100°F/100% RH (38°C/100% RH)
10,000 minutes
10,000 minutes
INITIAL PEEL AND CLEAVAGE
(a,c)
“T” Peel Strength (Flexible to Flexible)
90° Peel Strength (Flexible to Rigid)
Cleavage Peel Strength (Rigid to Rigid)
ENGAGED THICKNESS
(d)
(Nominal without liner)
CLOSURE CYCLE LIFE
(e)
SHELF LIFE
Pounds/inch width (kilograms/cm width)
4.0 (0.70)
9.2 (1.6)
1.6 (0.28)
4.8 (0.85)
9.6 (1.7)
22.6 (4.0)
Inches (cm) ± Tolerance
0.13 (0.33) ± 15%
0.21 (0.53) ± 15%
5,000
50
Twenty four 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 (57.3 sq. cm/
kilogram) of fastening area per pound 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
panel, while the other mated fastener is not attached to an adherend and is disengaged at 90° angle during the peel.
b) The use of 3M™ Scotchmate™ Loop Reclosable Fasteners engaged to 3M™ Dual Lock™ Reclosable Fasteners provides increased strength
over standard Scotchmate reclosable fasteners. Scotchmate to Dual Lock combinations provide 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 to release.
c) 3M™ Scotchmate™ Reclosable Fasteners SJ3522 and SJ3523 and 3M™ Dual Lock™ Reclosable Fastener SJ3560 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 fasteners 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 original
peel values.
-2-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3522 and SJ3523
Nylon Hook and Loop
Plasticizer resistant adhesive
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 SJ3522 and SJ3523 have
not been tested after exposure to 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 SJ3522 and
SJ3523 has good resistance to many plasticizers found in common flexible vinyl and
other materials, resulting in retained adhesive strength and performance with time
compared to rubber based adhesives. Scotchmate reclosable fasteners SJ3522 and
SJ3523 are suggested for adhering to plasticized materials. Many of our Dual Lock
reclosable fasteners products can also be evaluated to determine if the adhesive
performance meets the requirement of the end use application.
Flammability Resistance:
Scotchmate reclosable fasteners SJ3522 and SJ3523 will
not pass common flammability tests when tested unattached. If you need 3M
Reclosable Fasteners to 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 adhesive on Scotchmate reclosable fasteners SJ3522 and
SJ3523 is formulated to withstand typical indoor conditions temperature, humidity
and ultraviolet exposure conditions. If your application requires increased outdoor
performance review the Scotchmate reclosable fastener Polyester or Nylon or Dual
Lock reclosable fastener 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 product selection guide 3M™ Scotchmate™ Polyester Hook and Loop
Reclosable Fasteners or 3M™ Dual Lock™ Reclosable Fasteners for 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 SJ3522 and SJ3523 have not been tested to 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
SJ3522 and SJ3523
Nylon Hook and Loop
Plasticizer resistant adhesive
Additional
Performance
Characteristics
(continued)
Sterilization/Autoclaving:
3M™ Scotchmate™ Reclosable Fasteners SJ3522 and
SJ3523 have not been tested to 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 1 lot of Scotchmate
reclosable fasteners SJ3522 and SJ3523 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 2.3 for
SJ3522 and 2.0 for SJ3523.
ASTM G21-96 “Fungal Challenge Test”:
Three samples from 1 lot of
Scotchmate reclosable fasteners SJ3522 and SJ3523 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). SJ3522 had an average fungal
growth of 2.3 after 7, 14, 21 and 28 days, whereas SJ3523 gave an average rating
of 2.0, 2.3, 2.3 and 2.3 for the same time periods.
Static Discharge:
Scotchmate reclosable fasteners SJ3522 and SJ3523 have
not been tested for static charge released during liner removal, closure opening nor
adhesive removal from the adherend once a fastener has been applied. 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
SJ3522 and SJ3523
Nylon Hook and Loop
Plasticizer resistant adhesive
Roll Lengths
(a)
and Colors
(b)
– Yards (Meters)
3M™ Scotchmate™ Reclosable Fasteners
Standard Sizes Available
(c)
Widths
in. ± 1/16"
(mm) ± 1.6
1/2" (12.7 mm)
5/8" (15.9 mm)
3/4" (19 mm)
1" (25.4 mm)
1
1
/
2
" (38.1 mm)
2" (50.8 mm)
3" (76.2 mm)
4 (101.6 mm)
Selvedge
Edge
(d)
One Edge
One Edge
One Edge
One Edge
Two Edges
Two Edges
One Edge
Two Edges
Extended
Liner
(d)
One Edge
One Edge
One Edge
One Edge
Two Edges
Two Edges
One Edge
Two Edges
SJ3522 (Hook)
50 (45.7)
SJ3523 (Loop)
50 (45.7)
BK
BK, W
BK, W
BK, W, OR
BK
BK, W
BK
BK
BK
BK, W
BK, W
BK, W, OR
BK
B, BK, W
–
BK
a) 3M™ Scotchmate™ Reclosable Fasteners SJ3522 and SJ3523 are available on a 3" fiber core. 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 not listed above or special sizes.
b) Standard colors are white (W) and black (BK). Orange (OR) is available in 1" width and beige (B) is available for 2" wide loops. Other
colors are available as special orders. 3M recommends before placing an order, that the user evaluate a color sample to determine if the
color meets their total use needs. Contact your local 3M distributor or 3M representative for a color selection guide, minimum order
quantities and lead times.
c) 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.
d) Selvedge edges and extended liner availability. Other configurations may be possible as a special order.
Product Number
SJ3522
SJ3522/23
Fabricated Forms
1" x 2" black pre-cut hook with liner. 1,000 pieces per case.
1" x 4" orange pre-mated samples with liner. 1,000 pre-mated pieces per case.
Attachment
Techniques
The following information is intended to assist the designer considering the use of adhesively
coated 3M™ Scotchmate™ Reclosable Fasteners. System product performance depends upon
a number of factors, including the fastener (material, adhesive, and area), application method,
adherend surface characteristics (material, texture and cleanliness), environmental conditions
(moisture, ultraviolet and temperature exposure) plus the time it is expected to support a given
load. Because many of these factors are uniquely within the user’s knowledge and control, it is
required that the user evaluate 3M products to determine whether they are fit for a particular
purpose and suitable for the user’s substrates, method of application and desired end use.
Design Considerations:
As a general rule, four square inches of fastener area per pound
(57.3 square centimeters per kilogram) of static load to be supported is suggested as a starting
point for evaluation. More or less area may be needed depending on specific conditions or end
use applications.
Rounding the corners, slightly recessing the product into the substrate or providing raised
edges around the reclosable fastener can reduce the possibility of edge lifting and improve the
overall appearance of the fastener on the finished product. Mechanically securing the corners
of the fastener with rivets, staples, screws, etc. may also reduce the possibility of edge lifting,
but may reduce the closure performance.
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