3
™
Scotchmate Reclosable Fasteners
SJ3530 and SJ3531
Nylon Hook and Loop
Technical Data
March, 2008
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 tiny, stiff hooks, about 300 hooks 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 ensure maximum dimensional stability and flatness.
These hook and loop fasteners are coated on the backside with an aggressive and
tacky rubber based pressure sensitive adhesive designed to function over a range of
temperatures and humidity. This permits these fasteners to be easily and
conveniently attached to a variety of substrates.
Product Construction
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Products
3M™ Scotchmate™ Reclosable Fasteners
SJ3530 (Hook) and SJ3531 (Loop)
SJ3530P (Hook) and SJ3531P (Loop)
Hook
Loop
Backing
Adhesive
Standard Colors
a
Thickness
b
max. unmated
Selvedge Edge
In. (mm) ± 1/32" (0.8 mm)
Weight
b
oz/in
2
(g/cm
2
)
Liner
Hook
Loop
Hook
Loop
nylon 6
nylon 6,6
nylon 6,6
Rubber
Black, White, Beige
0.091" (2.4 mm)
0.125" (3.2 mm)
0.094" (2.4 mm)
0.125" (3.2 mm) for 4" wide
0.014 oz/in
2
(0.062 g/cm
2
)
0.015 oz/in
2
(0.066 g/cm
2
)
Yellow Polypropylene film (3 mil)
SJ3530P and SJ3531P - Diecuttable Paper
Material of Construction
a) Other colors are available as special orders. The adhesive may produce a yellow tint to some light
colored hook and loop products. Therefore, 3M recommends the user evaluate the products to see if it
meets their color requirements. See your 3M authorized distributor or 3M representative for color
selection guide and minimum requirements.
b) All thickness and weight values are with the liner removed.
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3530 and SJ3531
Nylon Hook and Loop
Typical System
Performance
Physical Properties
and Performance
Characteristics
e
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
System Performance
Products
3M™ Scotchmate™
Reclosable Fastener
SJ3531 engaged to
3M™ Scotchmate™
Reclosable Fastener
SJ3530
3M™ Scotchmate™
Reclosable Fastener
SJ3531 engaged to
3M™ Dual Lock™
a
Reclosable Fastener
SJ3540
TENSILE (Rigid to Rigid Substrates)
Dynamic Tensile Engagement Strength
Dynamic Tensile Disengagement
b
Static Tensile Holding Power
100°F/100% RH
100°F
120°F
158°F
SHEAR (Rigid to Rigid Substrates)
Dynamic Shear (1" x 1" overlap)
b
Static Shear Holding Power
100°F/100% RH
100°F
120°F
158°F
PEEL AND CLEAVAGE
b
Cleavage Strength (Rigid to Rigid)
Peel Strength (“T” Peel, Flexible to Flexible)
Peel Strength (90° Peel, Flexible to Rigid)
ENGAGED THICKNESS
b
(Nominal without liner, no load)
CLOSURE CYCLE LIFE
c
SHELF LIFE
d
lbs
F
/sq inch (kNewtons/m
2
) @ 72°F/50% RH
< 1.0 (< 6.9)
< 1.0 (< 6.9)
9 (64)
32 (218)
2
(75 grms/cm
2
) for indicated
Holds minimum 1#/in
time and temperature
3,000 minutes
3,000 minutes
9,000 minutes
9,000 minutes
2,500 minutes
3,500 minutes
20 minutes
20 minutes
lbs
F
/sq inch (kNewtons/m
2
):
8 (55)
TBD
Holds minimum 1#/in
2
(75 grms/cm
2
) for indicated
time and temperature
4,500 minutes
9,000 minutes
7,000 minutes
10,000 minutes
1,300 minutes
1,100 minutes
28 minutes
15 minutes
Pounds/inch width (grams/cm width)
0.35 (62)
1.3 (232)
2.5 (446)
3.9 (696)
4.4 (786)
6.1 (1,089)
Inches (mm) ± Tolerance
0.17 (4.3) ± 15%
0.22 (5.6) ± 15%
5,000
18 months
50
18 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 exposure to prolonged periods of moisture or other
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) 3M™ Scotchmate™ Loop engaged to 3M™ Dual Lock™ Reclosable Fastener provides increased strength over
standard 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 sufficiently high to the
substrate may cause the fastener to release from the substrate.
b) 3M™ Scotchmate™ Reclosable Fasteners SJ3530, SJ3531 and 3M™ Dual Lock™ Reclosable Fastener
SJ3540 are engaged with firm pressure and disengaged, peeled or cleaved at the rate of 12 inches (305 mm) per
minute. The engaged thickness is dependent upon the direction and amount of applied load.
c) 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 value.
d) Shelf life is from date of manufacture when stored in original packaging at 72°F (21°C) and 50% relative humidity.
e) Typical 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 before producing production quantities of materials.
-2-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3530 and SJ3531
Nylon Hook and Loop
Additional
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.
Solvent Resistance:
The nylon components resist attack by most common solvents
and alkaline solutions. Acid solutions may cause deterioration of the fastener. The
adhesive on 3M™ Scotchmate™ Reclosable Fasteners SJ3530 and SJ3531 may be
affected by many common laboratory solvents and transportation fluids (gasoline,
motor oil, etc.). If solvent resistance is desired, it is suggested that the customer
evaluate 3M™ Scotchmate™ Reclosable Fasteners SJ3571, SJ3572 or many of our
3M™ Dual Lock™ Reclosable Fastener products.
Plasticizer Resistance:
The adhesive on Scotchmate reclosable fasteners SJ3530
and SJ3531 may be affected by plasticizers found in many common flexible vinyls
or other materials containing high levels of plasticizing materials. This may result
in softening or loss of adhesion indicative of plasticizer migration. If plasticizer
resistance is desired Scotchmate reclosable fasteners SJ3522 and SJ3523 or many
of our reclosable fastener products can be evaluated.
Flammability Resistance:
If you need 3M™ Reclosable Fasteners to meet
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
publication
3M™ Scotchmate™ Reclosable Fasteners Flame Resistant Products
Product Selection Guide
(70-0707-3992-8).
Resistance to Environmental Exposure:
Temperature down to -20°F (-29°C)
increases the typical closure strength. If products will be exposed to outdoor
weathering or ultraviolet exposure then black is suggested and preferably 3M™
Scotchmate™ Reclosable Fasteners SJ3571, SJ3572, SJ3576, SJ3577 or many of
our Dual Lock reclosable fastener products.
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.
Improved water resistance of the closure can be obtained by using polyester hook
and loop (3M™ Scotchmate™ Reclosable Fasteners SJ3576, SJ3577, SJ3586 or
SJ3587) or our polyolefin based Dual Lock reclosable fasteners. 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 spacecraft. Generally 3M reclosable
fasteners with acrylic or no adhesive have lower volatile outgassing values.
Scotchmate reclosable fastener SJ3530 and SJ3531 have not been tested for
outgassing. Products tested at the Goddard Space Flight Center can be found at the
following web site: http://outgassing.nasa.gov/
Sterilization/Autoclaving:
Typically plainback 3M™ Scotchmate™ Reclosable
Fasteners SJ3401 or SJ3402 can be gas or steam sterilized, or autoclaved with most
common systems.
Washing and Dry Cleaning:
Plainback products sewn to fabrics will typically
shrink less than 4% after washing or dry cleaning, unless the fabric has greater
shrinkage amounts.
-3-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3530 and SJ3531
Nylon Hook and Loop
Available Sizes
a
3M™ Scotchmate™ Reclosable Fasteners
SJ3530 (Hook) and SJ3531 (Loop)
Standard
Roll
Selvedge
Extended
Widths
a
Length
Edge
b
Liner
b
in. ± 1/16" (mm) ± 1.6
Yards (Meters)
1/2" (12.7 mm)
5/8" (15.9 mm)
3/4" (19 mm)
1" (25.4 mm)
1
1
/
4
" (31.8 mm)
1
1
/
2
" (38.1 mm)
2" (50.8 mm)
4" (101.6 mm)
50 yds. (45.7 meters)
25 yds. (22.8 meters)
50 yds. (45.7 meters)
25 yds. (22.8 meters)
50 yds. (45.7 meters)
25 yds. (22.8 meters)
50 yds. (45.7 meters)
50 yds. (45.7 meters)
50 yds. (45.7 meters)
27 yds. (24.6 meters)
50 yds. (45.7 meters)
50 yds. (45.7 meters)
One Side
One Side
One Side
One Side
Both Sides
Both Sides
Both Sides
Both Sides
Both Sides
One Side
One Side
One Side
One Side
Both Sides
Both Sides
Both Sides
Both Sides
Both Sides
SJ 3530P (Hook)
SJ 3531P (Loop)
—
—
—
1" (25.4 mm)
100 yds (91.4 meters)
—
1
1
/
2
" (38.1 mm)
100 yds (91.4 meters)
2" (50.8 mm)
100 yds (91.4 meters)
—
a) All 3M™ Scotchmate™ Reclosable Fasteners SJ3530 and SJ3531 products are available on 3" core. Not all
roll lengths may be available in all standard widths or colors. Contact your 3M authorized distributor or 3M
representative for details on supplying special sizes.
b) Standard selvedge edges and extended liner availability. Other configurations may be possible as a special
order. 3M™ Reclosable Fasteners can be fabricated in many custom shapes and sizes to fit your product
design and manufacturing process. Contact your local 3M authorized converter or 3M representative for
additional options, configurations and ordering information.
Attachment
Techniques
The following information is intended to assist the designer considering the use of 3M™
Scotchmate™ Reclosable Fasteners. Final product performance depends on actual
conditions, including the fastener selected, the conditions in which the fastener is applied
and 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 evaluate the 3M product to determine whether it is fit 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 evaluation. More or less area may be needed
depending on specific conditions or end use applications.
The most important techniques for attaching Scotchmate reclosable fasteners SJ3530 and
SJ3531 are summarized below. For complete details on techniques and options for
attaching reclosable fasteners please see the technical bulletin
Attachment of 3M™
Scotchmate™ and Dual Lock™ Reclosable Fasteners.
Pressure Sensitive Adhesive attachment:
The fasteners and surfaces should have
equilibrated for a minimum of 1 hour at temperatures of 68°F (20°C) or greater before
application. Generally these adhesive backed fasteners should be applied to surfaces that
are smooth, dry and free of oils, mold release agents or other surface contaminants.
-4-
3M
™
Scotchmate
™
Reclosable Fasteners
SJ3530 and SJ3531
Nylon Hook and Loop
Attachment
Techniques
(continued)
It is recommended to wipe the surface with a solvent such as isopropanol/water
solution (50:50) and allow to dry.
NOTE:
Be sure to follow the manufacturer’s
precautions and directions for use when using solvents. The liner is removed and
without touching the adhesive, the fastener is applied to the surface using firm roller
pressure to help ensure complete adhesive contact to the substrate.
The pressure-sensitive adhesive bonds on contact and parts can be handled
immediately. Adhesive bond strength increases with time, pressure and temperature.
A minimum of one hour dwell is recommended before applying a load or
disengaging. Recommended time to achieve maximum bond strength is 24 hours.
Heat (Press) Bonding:
3M™ Scotchmate™ Reclosable Fasteners SJ3530 (Hook)
and SJ3531 (Loop) can be attached to many fabric and foam articles by press
bonding. The fastener is adhered to the article and bond strength is increased by
applying heat and pressure for a given time period.
Mechanical Attachment:
The bond strength of Scotchmate reclosable fasteners
SJ3530 and SJ3531 can be increased by mechanically attaching it to difficult to
adhere to surfaces such as textured plastics and wood by using staples.
Application Ideas
Scotchmate reclosable fasteners SJ3530 and SJ3531 can 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 evaluate the 3M product to determine
whether it is fit for a particular material purpose and suitable for the user’s method
of application.
Plastics
Paper
Glass
Fabrics
Cardboard
Sealed Wood
Bare and Painted Metal
Acrylic
Polycarbonate
Polyethylene
Polypropylene
Polystyrene
Rigid Vinyl
Scotchmate reclosable fasteners SJ3530 and SJ3531 has shown to be useful for:
Anti-Scratch Surface
Vibration and Sound Dampening Control
Name Plate Attachment
Disposable Industrial Applications
Point of Purchase Displays
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