• Description for 3M 4950

    • White, closed-cell acrylic foam carrier • used on high surface energy plastic substrates • Apply as low as 50°F (10°C) • UL 746C

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Tape
    Substrate Aluminum, Plastic: Acrylic, Ceramic, Plastic: Epoxy, Glass, Metal, ABS, Polycarbonate, Rigid PVC, Enameled Steel, Steel: Galvanized Steel, Stainless Steel, Plastic, Steel, High surface energy plastic
    Manufacturer 3M
    Chemistry Acrylic
    Cure Method Pressure sensitive
    Color Black, White
    Chemical Resistance Ammonia cleaner, Gasoline, JP-4 jet fuel, Methyl ethyl ketone, Mineral spirits, Motor oil
    Relative Solvent Resistance Chemical Resistance: Acetone, Chemical Resistance: Excellent solvent resistance
    High Temperature Resistance (°C) 110, 75, 90, 149, 93
    Low Temperature Resistance (°C) -35
    Density (g/cm³) 0.800
    Key Specifications UL746C
  • Technical Data

    Overview
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    Specifications
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  • Best Practices

    *See Terms of Use Below

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Shear Strength Test Methods
Shear Strength Type Cure Time Substrate Test Time Test Temperature Test Method
High
80 psi Dynamic Overlap Shear Strength 4,320 min Stainless Steel 25°C Room Temperature ASTM D-1002 - To stainless steel, room temperature, 1 in2 (6.45 cm2), jaw speed 0.5 in/min (12.7 mm/min.) Peak force to separate is measured. 72 hour dwell.
1500 (grams) Static Shear Strength Stainless Steel 600,000 sec 22°C ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
1000 (grams) Static Shear Strength Stainless Steel 600,000 sec 66°C ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
500 (grams) Static Shear Strength Stainless Steel 600,000 sec 93°C ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
Tensile Strength Test Methods
Tensile Strength Cure Time Substrate Test Temperature Test Method
High
140 psi 4,320 min Aluminum 25°C Room Temperature ASTM D-897 - To aluminum, room temperature, 1 in2 (6.45 cm2), jaw speed 2 in/min (50 mm/min.) Peak force to separate is measured. 72 hour dwell.
Peel Strength Test Methods
Peel Strength Type Cure Time Substrate Test Temperature Test Method
High
25 (lb/in) 90° Peel Strength 4,320 min Stainless Steel 25°C Room Temperature Based on ASTM D3330 -To stainless steel, room temperature, jaw speed 12 in/min (305 mm/min). Average force to remove is measured. 72 hour dwell.
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
110°C
75°C
90°C
93°C Long Term Temperature Tolerance - Maximum temperature where tape supports at least 250 g load per 0.5 in2 in static shear for 10,000 minutes. (Represents continuous exposure for days or weeks)
149°C Short Term Temperature Tolerance - No change in room temperature dynamic shear properties following 4 hours conditioning at indicated temperature with 100 g/static load. (Represents minutes, hours in a process type temperature exposure).
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.28 ASTM D150, 1 KHz
1.99 ASTM D150, 1 MHz
Dielectric Strength Test Methods
Dielectric Strength Test Method
630 V/mil ASTM D149
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.02270 ASTM D150, 1 KHZ
0.03700 ASTM D150, 1 MHZ
Thermal Conductivity Test Methods
Thermal Conductivity Test Method
0.09 W/m°K K-Value
Volume Resistivity Test Methods
Volume Resistivity Test Method
1.5e15 (ohms/cm) ASTM D257
Modulus Test Methods
Modulus Temperature Test Method
6e5 (Pa) 25°C Shear modulus, 1 Hz