SJ3540 Datasheet SJ3540 | P1-P3

Dual Lock

™

Reclosable Fasteners

SJ3540 (Type 250)

SJ3541 (Type 400)

SJ3542 (Type 170)

Product Description

3M™ Dual Lock™ 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 fasteners consist of continuous strips of

polyolefin with polyolefin stems having a mushroom shaped top. The mushroom

heads allow 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.

3M™ Dual Lock™ Reclosable Fasteners SJ3540, SJ3541 and SJ3542 all contain a

synthetic rubber based adhesive on a 1/32" conformable polyethylene foam backing

covered by a liner. This construction allows for better contact with substrates having

slight texturing or surface irregularities.

This product construction is especially suited to indoor applications or where elevated

temperatures are not experienced. 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 November, 2002

Note: The following technical information and data should be considered representative

or typical only and should not be used for specification purposes.

Fastener Products Dual Lock SJ3540 Dual Lock SJ3541 Dual Lock SJ3542

(Type 250) (Type 400) (Type 170)

Material of Construction

Stem/Heads Polypropylene

Backing Polypropylene

Adhesive Synthetic Rubber on Polyethylene Foam

Standard Color Black

Thickness

(a)

unmated ± 15% 0.14" (3.5 mm) 0.14" (3.5 mm) 0.14" (3.5 mm)

Selvedge Edges None

Weight

(a)

0.064 oz/in

0.068 oz/in

0.057 oz/in

(0.28 g/cm

) (0.30 g/cm

) (0.25 g/cm

)

Liner White 5 mil (0.13 mm) thick

silicone treated polyolefin liner.

a) All thickness and weight values are with the liner removed.

Dual Lock

Reclosable Fasteners

SJ3540(Type 250) • SJ3541(Type 400) • SJ3542(Type 170)

Typical System

Performance

Physical Properties

and Performance

Characteristics

Note: The following technical information and data is intended as a user guide representing

typical performance and should not be used for specifications.

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™

SJ3542 (Type 170) SJ3540 (Type 250) SJ3527 (loop)

engaged to engaged to engaged to

3M™ Dual Lock™ 3M™ Dual Lock™ 3M™ Dual Lock™

Reclosable Fastener Reclosable Fastener Reclosable Fastener

SJ3540 (Type 250) SJ3541 (Type 400) SJ3540 (Type 250)

(b)

TENSILE (Rigid to Rigid Substrates) lbs

/sq inch (kNewtons/m

) @ 72°F/50% RH

Dynamic Tensile Engagement Strength 15 (103) 40 (276) <1 (<6.9)

Dynamic Tensile Disengagement

(c)

35 (241) 66 (455) 35 (242)

Static Tensile Holding Power Holds minimum 1.1 #/in

(77.5 grams/cm

)

for indicated time and temperature

100°F/100% RH 20,000 minutes 20,000 minutes 20,000 minutes

120°F 20,000 minutes 20,000 minutes 20,000 minutes

140°F 10,000 minutes 10,000 minutes 3,000 minutes

158°F 1,000 minutes 1,500 minutes 275 minutes

SHEAR (Rigid to Rigid Substrates) lbs

/sq inch (kNewtons/m

)

Dynamic Shear (1" x 1" overlap)

(c)

16 (110) 43 (298) 124 (855)

Static Shear Holding Power Holds minimum 1.1 #/in

(77.5 grams/cm

)

for indicated time and temperature

100°F/100% RH 7,200 minutes 10,000 minutes 10,000 minutes

120°F 10,000 minutes 10,000 minutes 10,000 minutes

140°F 45 minutes 10,000 minutes 10,000 minutes

158°F 33 minutes 47 minutes 1,000 minutes

PEEL AND CLEAVAGE

(c)

Pounds/inch width (grams/cm width)

Cleavage Strength (Rigid to Rigid) 17 (3040) 30 (5370) 14 (2500)

Peel Strength (“T” Peel, Flexible to Flexible) 0.7 (125) 1.4 (250) 4.1 (730)

Peel Strength (90° Peel, Flexible to Rigid) 1.8 (322) 5.4 (966) 6.1 (1090)

ENGAGED THICKNESS

(d)

Inches (mm) ± Tolerance

(Nominal without liner) 0.27 (6.8) ± 15% 0.27 (6.8) ± 15% 0.17 (4.4) ± 20%

CLOSURE CYCLE LIFE

(e)

1,000 1,000 50

SHELF LIFE

(f)

18 months 18 months 18 months

Note: Long Term Static Load: Conditions such as temperature variations, engagement area, or prolonged periods of exposure to

environmental factors can affect the closure strength and long term static load performance. After engagement 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 performance of 3M™ Dual Lock™ Reclosable Fasteners is in approximately the following order of increasing

strength: Dual Lock SJ3542 engaged to Dual Lock SJ3540 < (less than) Dual Lock SJ3542 engaged to Dual Lock SJ3541 ≈ (approximately

equal to) Dual Lock SJ3540 engaged to Dual Lock SJ3540 < Dual Lock SJ3540 engaged to Dual Lock SJ3541. Dual Lock SJ3541

engaged to Dual Lock SJ3541 and Dual Lock SJ3542 engaged to Dual Lock SJ3542 are not recommended combinations.

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 SJ3540, SJ3541, SJ3542 and Scotchmate SJ3527 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 specifications.

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 SJ3540, SJ3541 and SJ3542 may be affected by some

common laboratory solvents and transportation fluids (gasoline, motor oil, etc.) Tests

should be conducted by the user to evaluate the solvents and exposure time expected

for the actual application.

Plasticizer Resistance: The adhesive on Dual Lock SJ3540, SJ3541 and SJ3542 is

not resistant to plasticizers found in many common flexible vinyls or other materials

containing high levels of plasticizing materials. Tests should be conducted to

evaluate the plasticizer resistance for the chosen application and environmental

exposure and duration for the actual application. Products to evaluate for plasticizer

resistance are 3M™ Dual Lock™ Reclosable Fasteners SJ3560, SJ3550CF or

3M™ Scotchmate™ Reclosable Fasteners SJ3522 and SJ3523.

Flammability Resistance: These products have not been tested to the FMVSS 302

flammability test. If your application requires a fastener to pass FMVSS 302, then

3M™ Dual Lock™ Reclosable Fasteners SJ3751, SJ3781 and SJ3752 are suggested.

If you need reclosable fasteners that pass many of the other standard flammability

tests (such as FAR 25.853, ASTM E-162, ASTM E-662, BSS-7239, etc.), it is

suggested that you refer to the Flame Resistant Products data page. (70-0707-3992-8)

Environmental Effects: Temperatures down to -20°F (-29°C) increases the typical

closure strengths. For long term exposure to sunlight or ultraviolet radiation these

products should be placed between two opaque or UV resistant surfaces for best

results. Increased resistance to ultraviolet exposure is available with our Dual Lock

SJ3560 family of products. Specific testing under the expected environmental

conditions is recommended.

Water (Humidity) Resistance: Closure strength should not be affected after

prolonged exposure to water or humidity. Once bonded to the substrate the adhesive

has good resistance to moisture under typical use conditions. Exposure to elevated

heat and chlorine or bromine may compromise the adhesive 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 are

not recommended for this application. If low volatile outgassing is a requirement it is

suggested that our line of plainbacked or acrylic adhesive backed products be

evaluated. Products tested at the Goddard Space Flight Center can be found at the

following web site: http://e

pims.gsfc.nasa.gov/og-cgi/sectionb/sectionb html.sh.

Sterilization/Autoclaving: These Dual Lock products have not been tested for

performance after sterilization or autoclaving processes. It is recommended that the

customer evaluate the suitability of the Dual Lock product for these characteristics

typical of what is expected for normal usage.

Washing and Dry Cleaning: The adhesive present on these Dual Lock products

typically makes them unsuitable to washing or dry cleaning processes.

- 3 -

Dual Lock

Reclosable Fasteners

SJ3540(Type 250) • SJ3541(Type 400) • SJ3542(Type 170)

P1-P3 P4-P6

SJ3540

Mfr. #:

Buy SJ3540

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Cable Ties BLACK DUAL LOCK 2 INX50 YD BULK

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SJ3540