• 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, Acrylic, Ceramic, Glass, Metal, ABS, Polycarbonate, Rigid PVC, Enameled Steel, Stainless Steel, Plastic, Galvanized Steel, High surface energy plastic, Steel
    Manufacturer 3M
    Chemistry Acrylic
    Cure Method Pressure sensitive
    Color Black, White
    Chemical Resistance Acetone, Ammonia cleaner, Excellent solvent resistance, Gasoline, JP-4 jet fuel, Methyl ethyl ketone, Mineral spirits, Motor oil
    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