4905F 25MM

VHB Acrylic Foam Tape 4905F Product Data Sheet Updated : Sept. 2002 Supersedes : March 1996 Product Description 4905 is a clear acrylic VHB tape. It is colourless making it ideal for bonding transparent materials or for applications where a coloured bond line is unacceptable. These tapes have somewhat lower peel, tensile and shear performance than most other VHB due to their inherent softness. Physical Properties Adhesive Type Acrylic Not for specification purposes Thickness (ASTM D-3652) Density 0.50 mm 0.13 mm 0.63 mm 960 kg/m³ Release Liner Filmic (Red) Tape Colour Clear Tape Liner Total Shelf Life Performance Characteristics Peel Adhesion to Stainless Steel Not for specification purposes 90° peel @ room temp, 72 hr dwell, jaw speed 300mm/min Normal Tensile (TBlock) This tape product is clear in colour but NOT guaranteed to be optically clear. 24 months from date of despatch by 3M when stored in the original carton at 20°C & 50 % Relative Humidity 21 N/10mm 690 kPa to Aluminium at room temp, 6.45 sq cm, jaw speed 50 mm/min Static Shear Strength ½ sq inch overlap on Stainless Steel 1000 minutes 1000g at 22°C 500g at 66°C 500g at 93°C Temperature Performance Max (hours/minutes) Max Continuous (days/weeks) UV Light Resistance 150 °C 90 °C No change in clarity was seen after 346 hours QUV. 2 Date : Sept. 2002 VHB Acrylic Foam Tape 4905F Surfaces This product bonds to high energy surfaces such as glass, acrylic sheet and metals. Application Techniques 1. Bond strength is dependent upon the amount of adhesive-tosurface contact developed. Firm application pressure develops better adhesive contact & thus improves bond strength. Painted surfaces and varnishes should be evaluated. 2. To obtain optimum adhesion, the bonding Applications VHB Joining Systems are suited for use in many interior and exterior industrial applications. In many situations, they can replace rivets, spot welds, liquid adhesives, and other permanent fasteners. Each product in the VHB family has specific strengths. These can include high tensile, shear and peel adhesion and resistance to solvents, moisture and plasticiser migration. All VHB fasteners should be thoroughly evaluated by the user under actual use conditions with intended substrates, especially if expected use involved extreme environmental conditions. Bonding to Polypropylene and rubbers is not recommended. Initial tape application to surfaces at temperatures below 10°C is not recommended because the adhesive becomes too firm to adhere readily. However once properly applied low temperature holding is generally satisfactory. surfaces must be clean dry and well unified. A typical surface cleaning solvent is isopropyl alcohol & water. Use proper safety precautions for handling solvents. 3. Ideal tape application temperature range is 20°C to 40°C. VHB Joining Systems are suitable for bonding a variety of substrates, including sealed wood, many plastics, composites and metals. Plastics which can be a problem are polyethylene, polypropylene, teflon, silicones and other low surface energy materials. Plasticised vinyl bonding is dependent upon the types and concentrations of plasticisers which can migrate into the adhesives causing a reduction in bond strength; 4945 is most resistant to plasticiser migration. Galvanised surfaces are potential problems and should be carefully evaluated. To prevent corrosion on copper and brass, only lacquer coated material should be used with VHB Joining Systems. Thorough evaluations are recommended when bonding is required to any questionable surface. 3M and VHB are trademarks of the 3M Company. Values presented have been determined by standard test methods and are average values not to be used for specification purposes. Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own tests to determine their suitability for your applications. This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our recommendations.  3M United Kingdom PLC 1996 Tapes & Adhesives 3M United Kingdom PLC 3M House, 28 Great Jackson Street, Manchester, M15 4PA Product Information : Tel 0870 60 800 50 Fax 0870 60 700 99 3M Ireland 3M House, Adelphi Centre, Upper Georges Street, Dun Laoghaire,Co. Dublin, Ireland Customer Service : Tel (01) 280 3555 Fax (01) 280 3509