3
™
Scotchmate Reclosable Fasteners
SJ3532N and SJ3533N Family
Nylon Hook and Loop
Product Information
Product Description
June, 2006
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 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
medium tacky synthetic rubber pressure sensitive adhesive designed to function for indoor
applications. This adhesive is especially suited for attachment to low surface energy
adherends such as polyethylene, polypropylene, etc.
The hook and loop products are also available with a marked product splice. This makes
splice identification easier, allowing splice removal if desired. These products are ordered as
SJ3532NFSR for the hook and SJ3533NFSR for the loop.
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
Material of Construction
Hook
Loop
Backing
Adhesive
(a)
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
Hook
Loop
nylon 6
nylon 6,6
nylon 6
Transparent clear
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
(0.057 g/cm
2
)
0.013 oz/in
2
(0.057 g/cm
2
)
Non-printed yellow 3.0 mil
polyethylene film with a
silicone release coating.
Same yellow 3.0 mil
liner but with marked
product splices.
3M™ Scotchmate™ Reclosable Fasteners
SJ3532N
SJ3532NFSR
SJ3533N
SJ3533NFSR
a) The adhesive may produce a yellow tint to some light colored hook and loop products or adherends.
b) Other 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
SJ3532N and SJ3533N 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 guide is intended 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
SJ3532N Hook
SJ3533N Loop
engaged to
engaged to
SJ3533N Loop
Dual Lock™ SJ3540
(b)
TENSILE (Rigid to Rigid Substrates)
Pounds
F
/sq inch (Newtons/cm
2
):
Dynamic Tensile Engagement Strength
< 1.0 (0.69)
< 1.0 (0.69)
12 (8.4)
55 (38)
Dynamic Tensile Disengagement
(c)
2
2
Holds 1.1#/in (77.5 grams/cm ) for indicated time and temperature
Static Tensile Holding Power
100°F
10,000 minutes
10,000 minutes
120°F
850 minutes
600 minutes
158°F
100 minutes
75 minutes
100°F/100% RH
6,000 minutes
6,000 minutes
SHEAR (Rigid to Rigid Substrates)
Dynamic Shear (1" x 1" overlap)
(c)
Static Shear Holding Power
100°F
120°F
158°F
100°F/100% RH
INITIAL AVERAGE PEEL AND CLEAVAGE
(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
Inches (mm)
Pounds
F
/sq inch (Newtons/cm
2
):
22 (15)
110 (76)
Holds 1.1#/in
2
(77.5 grams/cm
2
) for indicated time and temperature
10,000 minutes
4,500 minutes
250 minutes
10,000 minutes
10,000 minutes
4,500 minutes
200 minutes
10,000 minutes
Pounds/inch width (grams/cm width)
1.8 (320)
7.6 (1,360)
1.1 (190)
1.7 (300)
7.9 (1,410)
29.0 (5,180)
0.14 (3.6)
5,000
0.19 (4.9)
50
Eighteen months from date of manufacturing when
stored in original packaging between 60° to 80°F
(16° to 27°C) and 40 to 60% 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 an 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
compared to standard Scotchmate reclosable fasteners but with a limited number of reclosures compared with total 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 substrate may
cause the fastener’s adhesive to release from the adherend.
c) 3M™ Scotchmate™ Reclosable Fasteners SJ3532N and SJ3533N and 3M™ Dual Lock™ Reclosable Fastener SJ3540 were 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 will decrease
under greater compression or increase with greater tension loads applied per given fastener area.
e) Cycle Life is the number of cycles (openings and closings) the fastener provides while maintaining 50% or greater of the initial peel value.
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3M
™
Scotchmate
™
Reclosable Fasteners
SJ3532N and SJ3533N 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 SJ3532N and SJ3533N
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 SJ3532N
and SJ3533N 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 SJ3532N and SJ3533N
will not pass common flammability tests when tested unattached to a 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 SJ3532N and SJ3533N
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 SJ3532N and SJ3533N 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
SJ3532N and SJ3533N Family
Nylon Hook and Loop
Additional
Performance
Characteristics
(continued)
Sterilization/Autoclaving:
3M™ Scotchmate™ Reclosable Fasteners SJ3532N and
SJ3533N 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:
Average fungus challenge ratings after 44
days when 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) gave an approximate
fungal growth after 44 days of 2.0 for Scotchmate reclosable fastener SJ3532N
and 2.7 for Scotchmate reclosable fastener SJ3533N.
ASTM G21-96 “Fungal Challenge Test”:
Scotchmate reclosable fastener
SJ3532N when 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) had an average fungal growth rating after 7, 14, 21 and 28 days of
approximately 2.0, 2.0, 2.3 and 2.3 respectively. Scotchmate reclosable fastener
SJ3533N had a fungal growth rating of approximately 2.3, 2.7, 2.7 and 2.7 for the
same time periods.
Static Discharge:
Scotchmate reclosable fasteners SJ3532N and SJ3533N have
not been tested for static charge released during liner removal, closure opening nor
adhesive removal from the 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
SJ3532N and SJ3533N Family
Nylon Hook and Loop
Roll Lengths – Yards (Meters)
3M™ Scotchmate™ Reclosable Fasteners
(a),(c)
Standard Sizes
Widths
in. ± 1/16"
(mm) ± 1.6
5/8"
(15.9 mm)
3/4"
(19 mm)
1"
(25,4 mm)
1-1/2"
(38.1 mm)
2"
(50.8 mm)
Available
(b),(e)
Extended
Liner
(d)
One Edge
One Edge
One Edge
Two Edges
Two Edges
SJ3532N
(Hook)
50
(45.7)
B, W, BK
W, BK
B, W, BK
B, W, BK
B, W, BK
SJ3533N
(Loop)
50
(45.7)
W, BK
W, BK
B, W, BK
W, BK
B, W, BK
W
W
SJ3532NFSR
(Loop)
50
(45.7)
SJ3533NFSR
(Hook)
50
(45.7)
Selvedge
Edge
(d)
One Edge
One Edge
One Edge
Two Edges
Two Edges
a) 3M™ Scotchmate™ Reclosable Fasteners SJ3532NFSR and SJ3533NFSR are identical to 3M™ Scotchmate™ Reclosable Fasteners
SJ3532N and SJ3533N, except the FSR series have marked product splices making splice identification easier if removal is desired.
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 SJ3532N, SJ3533N, SJ3532NFSR and SJ3533NFSR 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 edge is material along the edge of the fastener which has no functional hook or loop. Extended liners extend beyond the width
edge of the fastener to allow easier liner removal. Other configurations may be possible as a special order.
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. Contact your local 3M authorized converter or 3M representative for additional options,
configurations and ordering information.
Product Number
Fabricated Forms
SJ3532N/SJ3533N
5/8" x 1-1/2" premated cut pieces in slate gray.
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 adherends, 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 adherend 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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