• Description for 3M SJ3550

    Consists of continuous strips of polyolefin stems with a mushroom shaped top protruding up from the backing. There are three types (170, 250 and 400) of these fasteners referring to the approximate number of stems per square inch.

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    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Strip
    Substrate Acrylic, Glass, Bare Metal, Plastics, Polycarbonate, Sealed Wood
    Manufacturer 3M
    Chemistry Acrylic, Polypropylene
    Cure Method Pressure-Sensitive
  • Technical Data

    Overview
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    Specifications
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  • Best Practices

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Shear Strength Test Methods
Shear Strength Type Test Time Test Temperature Test Humidity Test Method
43 (lbs(F)/sq inch) Dynamic shear strength 1" x 1" overlap), The listed reclosable fastener combinations were engaged with firm pressure and disengaged at the rate of 12 inches (305 mm) per minute., System dynamic shear strength of Dual Lock reclosable fastener SJ3552 (Type 170) to Dual Lock reclosable fastener SJ3551 (Type 400) is 20 lbsF/sq inch (138 kNewtons/m2_x00D_ ) and Dual Lock reclosable fastener SJ3550 (Type 250) to Dual Lock reclosable fastener SJ3550 (Type 250) is 36 lbsF/sq inch (249 kNewtons/m2).
155 (grams/cm2) Static shear strength 600,000 sec 38°C 100 % (1" x 1" overlap), Holds minimum 2.2 #/in2 for indicated time and temperature
155 (grams/cm2) Static shear strength 600,000 sec 93°C (1" x 1" overlap), Holds minimum 2.2 #/in2 for indicated time and temperature
155 (grams/cm2) Static shear strength 600,000 sec 104°C (1" x 1" overlap), Holds minimum 2.2 #/in2 for indicated time and temperature
155 (grams/cm2) static shear strength 2,820 sec 121°C (1" x 1" overlap), Holds minimum 2.2 #/in2 for indicated time and temperature
Tensile Strength Test Methods
Tensile Strength Type Test Time Test Temperature Test Humidity Test Method
155 (grams/cm2) Static Tensile Strength 10,000 min 38°C 100 % Holds minimum 2.2 #/in2 (155 grams/cm2) for indicated time and temperature
155 (grams/cm2) Static Tensile Strength 10,000 min 93°C Holds minimum 2.2 #/in2 (155 grams/cm2) for indicated time and temperature
155 (grams/cm2) Static Tensile Strength 10,000 min 104°C Holds minimum 2.2 #/in2 (155 grams/cm2) for indicated time and temperature
155 (grams/cm2) Static Tensile Strength 10,000 min 121°C Holds minimum 2.2 #/in2 (155 grams/cm2) for indicated time and temperature
40 psi Dynamic Tensile Strength Engagement, System dynamic tensile engagement strength of Dual Lock reclosable fastener SJ3552 (Type 170) to Dual Lock reclosable fastener SJ3551 (Type 400) is 29 lbsF/sq inch (397 kNewtons/m2) and Dual Lock reclosable fastener SJ3550 (Type 250) to Dual Lock reclosable fastener SJ3550 (Type 250) is 29 lbsF/sq inch (397 kNewtons/m2).
57 psi Dynamic Tensile Strength Disengagement, The listed reclosable fastener combinations were engaged with firm pressure and disengaged at the rate of 12 inches (305 mm) per minute., Maximum tensile disengagement strength is dependent upon all of the stems disengaging at the same time with the two substrates parallel to and moving away from each other. If sections of the Dual Lock reclosable fastener lift during disengagement, the fastener will disengage in a peel or cleavage mode, reducing the observed strength., System dynamic tensile disengagement strength of Dual Lock reclosable fastener SJ3552 (Type 170) to Dual Lock reclosable fastener SJ3551 (Type 400) is 50 lbsF/sq inch (346 kNewtons/m2) and Dual Lock reclosable fastener SJ3550 (Type 250) to Dual Lock reclosable fastener SJ3550 (Type 250) is 44 lbsF/sq inch (304 kNewtons/m2)
Peel Strength Test Methods
Peel Strength Type Substrate Test Method
4.6 (Pounds/inch) 90° Peel Strenth Flexible to Rigid width
1.5 (Pounds/inch) T-Peel Strength Flexible to Flexible width
Cleavage Strength Test Methods
Cleavage Strength Substrate Test Method
32 (pounds/inch) Rigid to Rigid Substrates width