3M VHB Tape 4959

3M VHB Tape 4959 Datasheet
  • Description for 3M VHB Tape 4959

    They are ideal for use in many interior and exterior bonding applications. They can replace rivets, spot welds, liquid adhesives and other permanent fastener, made with acrylic foam, viscoelastic in nature.

    *See Terms of Use Below

    Application Type Bond
    Material Form Tape
    Substrate Ceramic, Epoxy, Foam, PBT, Glass, Metal, ABS, Polycarbonate, Rigid PVC, Enameled Steel, Galvanized Steel, Stainless Steel, Aluminum, Polyester, Galvanized Steel, Plastic, Steel
    Industry Replace Rivets, Interior bonding applications, Exterior bonding applications
    Manufacturer 3M
    Chemistry Acrylic Foam
    Cure Method Pressure sensitive
    Cure Time (min) 20, 1,440, 4,320
    Color White
    Chemical Resistance Fuel Resisitant
    Relative Solvent Resistance Chemical Resistance: Excellent solvent resistance
    High Temperature Resistance (°C) 149, 204, <120
    Low Temperature Resistance (°C) >-35
    Other Resistance Resistance to plasticizer migration
    Durability Durability
    Density (g/cm³) 0.800
    Key Specifications UL 746C
  • Technical Data for 3M VHB Tape 4959

    Overview
    • Application Type
    • Material Form
      • Tape
    • Substrate
    • Industry
      • Rivet - Replace Rivets
      • Interior - Interior bonding applications
      • Industrial - Replace Permanent Fasteners, Foils, Spot Welds
      • Industrial Exterior - Exterior bonding applications
      • Construction
      • Other - Replace Liquid adhesives
    • Chemistry
    • Application Method
      • Dispenser - Application equipment
      • Roll
      • Flow - Flow equipment
    • Cure Method
      • Pressure Sensitive (min) - Pressure sensitive
    • Color
      • White
    • Key Specifications
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) - UL 746C
    Specifications
    Cure Specs
    Application Temperature (°F) 50, 70 to 100
    Cure Time (min) 20, 1,440, 4,320 Test Method
    Bond Strength
    Peel Strength (piw) High, 20 (lb/in) Test Method
    Shear Strength (psi) High, 1,500, 1,000, 750, 750, 750, 55 (lb/in 2 kPa) Test Method
    Tensile Strength (psi) High, 75 (lb/in 2 kPa) Test Method
    Tape Properties
    Total Thickness (mil) 5 0.
    Double Sided Double Sided
    Material Resistance
    Chemical Resistance Fuel Resisitant
    Relative Solvent Resistance Chemical Resistance: Excellent solvent resistance
    High Temperature Resistance (°C) 149, 204, <120 Test Method
    Low Temperature Resistance (°C) >-35
    Moisture/Humidity Resistance Excellent moisture resistance
    Other Resistance Resistance to plasticizer migration
    Hardness
    Durability Durability
    Elasticity Viscoelastic
    Flexibility Firm
    Modulus (psi) 6e5 (Pa) Test Method
    Other Properties
    Coefficient of Thermal Expansion (CTE) 1e-4 (in./ in/°F), 1.8e-4 (mm/mm /°C), 180e-6 (m/m/°C) Test Method
    Density (g/cm³) 0.800
    Business Information
    Shelf Life Details All 3M™ VHB™ Tapes have a shelf life of 24 months from date of manufacture when stored at 40°F to 100°F (4°C to 38°C) and 0-95% relative humidity. The optimum storage conditions are 72°F (22°C) and 50% relative humidity. Performance of tapes is not projected to change even after shelf life expires; however, 3M does suggest that 3M™ VHB™ Tapes are used prior to the shelf life date whenever possible.
    Shelf Life Temperature (°F) 40 to 100
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 24
  • Best Practices for 3M VHB Tape 4959

    *See Terms of Use Below

    1. Surface Preparation

      Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA*) and water prior to applying 3M™ VHB™ Tapes.

      See Vendor Technical Data Sheet for more info.

      To obtain good performance with all 3M™ VHB™ Tapes, it is important to ensure that the surfaces are dry and free of condensed moisture.

    2. Application

      Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm application pressure develops better adhesive contact and helps improve bond strength. Typically, good surface contact can be attained by applying enough pressure to insure that the tape experiences approximately 15 psi (100 kPa) pressure. Either roller or platen pressure can be used. Note that rigid surfaces may require 2 or 3 times that much pressure to make the tape experience 15 psi.

      Ideal application temperature range is 70°F to 100°F (21°C to 38°C). Pressure sensitive adhesives use viscous flow to achieve substrate contact area. Minimum suggested application temperatures:50°F (10°C): 3M™ VHB™ Tapes 4950, 5952, 4910, 4952, 4611, 4622 families.

      Note: Initial tape application to surfaces at temperatures below these suggested minimums is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is generally satisfactory.

    3. Curing

      After application, the bond strength will increase as the adhesive flows onto the surface (also referred to as “wet out”). At room temperature approximately 50% of ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. This flow is faster at higher temperatures and slower at lower temperatures. Ultimate bond strength can be achieved more quickly (and in some cases bond strength can be increased) by exposure of the bond to elevated temperatures (e.g. 150°F [66°C] for 1 hour). This can provide better adhesive wetout onto the substrates. Abrasion of the surfaces or the use of primers/ adhesion promoters can also have the effect of increasing bond strength and achieving ultimate bond strength more quickly.

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    *See Terms of Use Below

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Cure Time Test Methods
Cure Time Test Method
20 min 50% of ultimate bond strength will be achieved
1,440 min 90% of ultimate bond strength will be achieved
4,320 min 100% of ultimate bond strength will be achieved
Shear Strength Test Methods
Shear Strength Type Cure Time Substrate Test Time Test Temperature Test Method
High
1,500 psi Static Shear Strength 72 hour dwell. Stainless Steel 604,800 sec 22°C Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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.
1,000 psi Static Shear Strength Stainless Steel 604,800 sec 66°C Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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.
750 psi Static Shear Strength Stainless Steel 604,800 sec 93°C Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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.
750 psi Static Shear Strength Stainless Steel 604,800 sec 121°C Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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.
750 psi Static Shear Strength Stainless Steel 604,800 sec 177°C Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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.
55 (lb/in 2 kPa) Dynamic Overlap Shear Strength Static Shear - ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.23 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
75 (lb/in 2 kPa) 72 hour dwell Aluminum 25°C 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
20 (lb/in) 90° Peel Adhesion 72 hour dwell. Stainless Steel 25°C 90° Peel Adhesion - Based on ASTM D3330 -To stainless steel, room temperature, jaw speed 12 in/min (304.8 mm/min). Average force to remove is measured. 72 hour dwell.
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
149°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).
204°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).
<120°C
Modulus Test Methods
Modulus Temperature Test Method
6e5 (Pa) 25°C Shear modulus, 1 Hz
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Test Method
1e-4 (in./ in/°F) Thermal Coefficient of Expansion
1.8e-4 (mm/mm /°C) Thermal Coefficient of Expansion
180e-6 (m/m/°C) Thermal Coefficient of Expansion