VHB Acrylic Foam Tape 4943F Product Data Sheet Updated : Sept. 2002 Supersedes : May 2002 Product Description 4943 is a conformable, very high bond acrylic foam tape which has added performance for bonding at low temperatures (above 0C). In addition this adhesive composition makes the product well suited to a variety of substrates. Its improved conformability also allows more complete bond contact area when bonding rigid or irregular materials. 4943 s principal advantage is that it provides a more uniform seal on irregular surfaces. Resistance to solvents, temperature extremes and U.V. light make VHB products suitable for many interior and exterior applications. Acrylic Physical Properties Adhesive Type Not for specification purposes Thickness (ASTM D-3652) Tape 1.1 mm 10% Liner 0.05 mm Total 1.15 mm 720 k/gm Foam Density Clear Film Release Liner Grey Tape Colour Shelf Life 24 months from date of despatch by 3M when stored in the original carton at 20C & 50 % Relative Humidity Performance Peel Adhesion to 44.0 N/10mm Characteristics Stainless Steel 90 peel room temp, 72 hr dwell, Not for specification purposes jaw speed 300mm/min Static Shear Strength weight held for 10,000 mins to stainless steel 1000 g 20C with sq in (3.23 sq cm) overlap 500 g 70C Normal Tensile (T- 585 kPa Block) to Aluminium at room temp, 6.45 sq cm, jaw speed 50 mm/min2 Date : Sept. 2002 VHB Acrylic Foam Tape 4943F Performance Temperature Characteristics (Cont...) Performance 150C Not for specification purposes (Minutes/Hours) 90C (Days/Weeks) Solvent Resistance No apparent degradation when exposed to splash testing Splash testing cycle - 20 seconds submersion of most solvents including gasoline, JP-4 jet fuel, mineral - 3 cycles. spirits, motor oil, ammonia cleaner, acetone, methyl ethyl ketone. 20 seconds air dry. UV Light Resistance Excellent. Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Additional Product Firm application pressure develops better adhesive contact and thus improves bond Information strength. To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified. Typical surface cleaning solvents are isopropyl alcohol/water mixture (rubbing alcohol) or heptane. Use proper safety precautions for handling solvents. It may be necessary to seal or prime some substrates prior to bonding. a. Most porous or fibred materials (e.g. wood) will require sealing to provide a unified surface. b. Some materials (e.g. copper, brass, plasticised vinyl) will require priming or coating to prevent interaction between adhesive and substrates. Acrylic Foam Tape 4943F utilises a unique low temperature acrylic adhesive which allows initial applications to be made at temperatures as low as 0C. At room temperature the adhesive is very aggressive and provides excellent initial adhesion to many surfaces. Low temperature application. Most high performance pressure sensitive acrylic adhesives have very low initial tack at temperatures below 0C. Acrylic Foam Tape 4943F was designed to allow outdoor assembly of signs and construction materials and assembly of cold materials in large manufacturing plants above 0C. Room temperature applications. At room temperature 4943F offers better tack/quick stick than other tapes in the VHB family. This can be important in a wide range of applications where a more aggressive adhesive is desirable.