Chemical Resistance Chemical Resistance: Excellent solvent resistance, Fuel Resistance, Chemical Resistance: Resistance to plasticizer migration, Chemical Resistance: Fluid Resistance: Water resistance, MEK resistance, Hydraulic fluid resistance, 10W30 Motor oil resistance, Glycol antifreeze resistance, Kerosene resistance, Isopropyl alcohol resistance, Gasoline resistance Application Type Bond 1 Part or 2 Part 1-Part Material Form Tape: Foam tape Substrate Aluminum, Acrylic, Ceramic, Epoxy, PBT, Glass, Metal, ABS, Plastic, High surface energy plastic substrates, Polycarbonate, Rigid PVC, Enameled Steel, Galvanized Steel, Stainless Steel Industry Ideal for use in many interior bonding applications, General purpose Manufacturer 3M Chemistry Acrylic Cure Method Pressure sensitive Application Temperature (°F) 50 Color White High Temperature Resistance (°C) 149, 93 Stress Relief Stress relaxing properties Conformable Conformability Durability Outstanding Density (g/cm³) 0.800 Key Specifications UL 746C Tape Backing/Carrier Acrylic foam backing
Technical Data for 3M 4930
- Chemical Resistance : Fluid Resistance : Water Resistance
- Chemical Resistance - Fuel Resistance, MEK resistance, Hydraulic fluid resistance, 10W30 Motor oil resistance, Glycol antifreeze resistance, Kerosene resistance, Isopropyl alcohol resistance, Gasoline resistance
- Chemical Resistance : Relative Solvent Resistance - Excellent solvent resistance
- Chemical Resistance : Plasticizer Resistance - Resistance to plasticizer migration
- Adhesive - Bond
1 Part or 2 Part
- Tape : Foam Tape
- Interior - Ideal for use in many interior bonding applications
- General Purpose
- Other - Ideal for use in many exterior bonding applications, Most common applications
- Pressure Sensitive (min) - Pressure sensitive
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) - UL 746C
- Acrylic Foam - Acrylic foam backing
Application Temperature (°F) 50
Peel Strength (piw) High, 20 (Ib/in) Test Method Shear Strength (psi) High, 100, 1500 (grams), 500 (grams), 500 (grams) Test Method Tensile Strength (psi) High, 160 Test Method
High Temperature Resistance (°C) 149, 93 Test Method Moisture/Humidity Resistance Excellent moisture resistance
Stress Relief Stress relaxing properties Conformable Conformability Durability Outstanding Elasticity Viscoelastic Flexibility Firm
Outgassing 0.77 (%TML), 0.01 (%VCM), 0.21 (%WVR) Density (g/cm³) 0.800
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) 39 to 100 Shelf Life Type From date of manufacture Shelf Life (mon) 24
Best Practices for 3M 4930
Clean: Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA*) and water prior to applying 3M™ VHB™ Tapes.
Exceptions to the general procedure that may require additional surface preparation include: Heavy Oils: A degreaser or solvent-based cleaner may be required to remove heavy oil or grease from a surface and should be followed by cleaning with IPA/water.
Abrasion: Abrading a surface, followed by cleaning with IPA/water, can remove heavy dirt or oxidation and can increase surface area to improve adhesion.Abrasion is not suggested with 3M™ VHB™ Tapes 4932 and 4952.
Adhesion Promoters: Priming a surface can significantly improve initial and ultimate adhesion to many materials such as plastics and paints.
Porous surfaces: Most porous and fibered materials such as wood, particleboard, concrete, etc. need to be sealed to provide a unified surface.
Unique Materials: Special surface preparation may be needed for glass and glass-like materials, copper and copper containing metals, and plastics or rubber that contain components that migrate (e.g. plasticizers).
Refer to 3M Technical Bulletin “Surface Preparation for 3M™VHB™ TapeApplications” for additional details and suggestions. (70-0704-8701-5)
TIme: 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.
Pressure: 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 rigids urfaces may require 2 or 3 times that much pressure to make the tape experience 15 psi.
Temperature: 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.
To obtain good performanc ewith all 3M™VHB™Tapes, it isi mportant to ensure that the surfaces are dry and free of condensed moisture.
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Shear Strength Test Methods
|Shear Strength||Type||Cure Time||Substrate||Test Time||Test Temperature||Test Method|
|100 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.|
|500 (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|
|160 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|
|20 (Ib/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|
|149°C||Short Term TemperatureT olerance-No change in roomtemperature dynamic shear properties following 4 hours conditioning at indicated temperature with 100 g/static load. (Represents minutes, hours in a process type temperature exposure).|
|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).|