3 Hot Melt Adhesive 3747 3779 3789 3797 Technical Data July, 2016 Product Description 3M Hot Melt Adhesives are heat applied, 100% solids adhesives. 3M Hot Melt 3747, 3779, 3789 and 3797 are thermoplastic adhesives to bond to wide variety of substrates such as wood, plastic, vinyl, metal and glass. 3M Hot Melt Adhesive 3747 General purpose adhesive for bonding dissimilar substrates such as wood to plastic, fabric to metal. 3M Hot Melt Adhesive 3779 High strength bonding with excellent environmental stability including very high heat resistance. Fast set time. 3M Hot Melt Adhesive 3789 High performance for plastic with good fuel, oil and plasticizer resistance. Long open time. 3M Hot Melt Adhesive 3797 Low viscosity for fast flow rates, good high temperature resistance, and fast set. Good for electrical potting. Features 100% solids, no VOCs Easy to use Long open times allow for easy use on large assemblies and large surfaces Adhesive sets and obtains strength in seconds Creates high performance bonds Ideal for woodworking and general industrial applications. Note: The following technical information and data should be considered representative Typical Physical or typical only and should not be used for specification purposes. Properties 3M Hot Melt Adhesive 3747 3779 3789 3797 Color (solid) Tan Amber Brown Off-White 3 Density (g/cm ) 0.97 0.99 0.95 0.92 1 Flashpoint (F) 509 550 >392 570 (1) Determined by Cleveland Open Cup ASTM D 92-72. Directions for 1. Surface Preparation: Surfaces must be clean, dry and dust free. Wipe with a solvent Use such as isopropyl alcohol for plastic, metal and glass substrates to remove oil and dirt.* *Note: When using solvents, extinguish all ignition sources, including pilot lights, and follow the manufacturers precautions and directions for use. are designed for application 2. Application: 3M Hot Melt Adhesives with a 3M Hot Melt Applicators. Read and follow the precautions and directions for use in the users manual before operating the applicator. 3M Hot Melt Adhesives are applied at 350- 385F. Adhesives yield approximately 430 linear feet per pound of adhesive when extruded as a 1/8 diameter semi-circular bead. Extruded bead sizes can be customized using 3M applicator tips. 3M Hot Melt Adhesive 3747 3779 3789 3797 Directions for 3. Coverage: 3M Hot Melt Adhesives yield approximately 430 linear feet per pound Use (continued) of adhesive when extruded as a 1/8 diameter semi-circular bead. 4. Set up time: After the bond is made, 3M Hot Melt Adhesives immediately build strength and no clamping is necessary. Set will occur faster on cold or metallic substrates. Typical Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Application 3M Hot Melt Adhesive Properties 3747 3779 3789 3797 Application 350-385F/ 350-385F/ 350-385F/ 350-385F/ 1 Temperature 177-196C 177-196C 177-196C 177-196C 4,100 7,000 5,200 2,650 2 Viscosity (CPS) 375F 375F 375F 375F Open Time 45 25 50 30 3 (seconds) Delivery Time 45 75 70 55 4 (seconds) 5/8x8 Q 5/8x8 Q 5/8x8 Q Available 5/8x2 TC 5/8x2 TC 5/8x2 TC 1x3 PG sizes/forms 1x3 PG 1x3 PG 1x3 PG 1/8 Bulk 1/2x12 AE 1/8 Bulk (1) Recommended application temperature range. Temperature can be adjusted to regulate desired viscosity, delivery rate and pot life. (2) Brookfield Thermocel Viscometer in Centipoise using a 27 Spindle 10 RPM. (3) Open time is the maximum time between the application of the adhesive and when the parts must be joined together. Data based on 1/8 semicircular bead on non-metallic substrates at 75F. Higher environmental temperatures and/or larger beads will lengthen open times. (4) Extrusion time for one 1x3 PG cartridge. Typical Note: The following technical information and data should be considered representative or Performance typical only and should not be used for specification purposes. Properties 3M Hot Melt Adhesive 3747 3779 3789 3797 1 Heat Resistance 145F/ 63C 300F/ 149C 220F/ 104C 170F/ 77C Ball & Ring Melt 220F/ 104C 325F/ 163C 270F/ 132C 304F/ 151C 2 Point 3 Shear Strength 430 psi 700 psi 570 psi 350 psi 4 Peel Strength 20 piw 18 piw 16 piw 10 piw UL94 Listing n/a V0 V2 V2 FDA Indirect 21 CFR 21 CFR 21 CFR 21 CFR 5 Food Contact 175.105 175.105 175.105 175.105 (1) Highest temperature that the adhesive will support a 2 psi dead load (2) ASTM E28-67 (3) Overlap shear measured on Douglas Fir to Douglas Fir (4) Measured in pounds per inch width (piw). Flexible canvas bonded to Douglas Fir (5) Permitted for indirect food contact subject to the limitations in applicable CFR section(s).