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Description for 3M 3738
High delivery rate and long bonding range • General purpose for foundry sand cores, wood bonding, corrugated, selected plastics and chipboardApplication Type Bond, Seal 1 Part or 2 Part 1-Part Material Form Stick, Pellets Substrate Fabric, Flexible Foam, ABS, Plastic, PolyEthylene, Polyolefins, Polystyrene Foam, Rigid Vinyl, Polycarbonate, Paper, Coated corrugated, FRP, Polystyrene Foam, Many plastics, Uncoated Cardboard, Uncoated Chipboard, Foams, Chipboard, Plain corrugated, Wood, Douglas fir Industry Core Manufacturer 3M Chemistry Jet melt, Hot melt Cure Method Hot melt Application Temperature (°F) 351 to 385 Viscosity (cPs) 2,875 Color Tan High Temperature Resistance (°C) 54 Density (g/cm³) 0.950 Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): Applicable 21 CFR 175.105, UL 94 - V2 -
Technical Data for 3M 3738
Overview
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1 Part or 2 Part
- 1-Part
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Material Form
- Stick
- Pellets
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Substrate
- Foam - Flexible Foam, Foams, Polystyrene Foam
- Polyolefin - Polyolefins
- Plastic - Many plastics
- ABS
- Polyethylene (LDPE, HDPE) - PolyEthylene
- Polystyrene (PS) - Polystyrene Foam
- Vinyl - Rigid Vinyl
- Polycarbonate
- Wood - Plain corrugated, Uncoated Chipboard, Chipboard, Douglas fir, Coated corrugated
- Composites - FRP
- Fabric
- Paper - Uncoated Cardboard
- Other - Laminate, Leather, Masonite, Canvas, Sand cores, Other lightweight materials
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Industry
- Electronics - Core
- Industrial - Foundries sand cores, Lugage, Toys, General industrial applications
- Packaging - Cartons
- Furniture / Wood-Working - Furniture, Wood Working
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Chemistry
- Hot melt
- Other - Jet melt
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Cure Method
- Hotmelt - Hot melt
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Color
- Brown - Tan
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Key Specifications
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) - UL 94 - V2
- FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency) : 175.105 - Applicable 21 CFR 175.105
Specifications
Cure Specs
Application Temperature (°F) 351 to 385 Viscosity (cPs) 2,875 Test Method Softening Point (°C) 86, 86 Test Method Work / Pot Time (min) 0.83 Test Method Bond Strength
Peel Strength (piw) 13 Test Method Shear Strength (psi) 375 Test Method Tensile Strength (psi) 360 Test Method Material Resistance
High Temperature Resistance (°C) 54 Test Method Hardness
Elongation (%) 1,000 Other Properties
Flash Point (°F) 550.4 Test Method % Solids (%) 100 Density (g/cm³) 0.950 Business Information
Shelf Life Details When stored at the recommended conditions, this product has a shelf life of 2 years after 3M ships the product to a customer or distributor Shelf Life Temperature (°F) 120 Shelf Life (mon) 24 -
Best Practices for 3M 3738
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Surface Preparation
Surfaces must be clean, dry and dust free. Wipe with a solvent such as isopropyl alcohol for plastic substrates to aid in removing oil and dirt.
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Application
3M™ Hot Melt Adhesives are designed for application with a 3M™ Hot Melt Applicators. Read and follow the precautions and directions for use in the user’s manual before operating the applicator. 3M™ Hot Melt Adhesives are applied at 350-385°F, except the Low Melt (LM) series which are designed to be applied at 250-275°F. LM series are adhesives designed for lower temperature application but still yield long-lasting bonds. Extruded bead sizes can be customized using 3M™ applicator tips.
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Comparable Materials for 3M 3738
Spec Engine® Results
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Thermogrip 6363(Bostik)General purpose hot melt adhesive: medium open time, exhibits good bonding characteristics
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3764(3M)Bonds variety of plastics including polycarbonate, polyethylene, and polypropylene • Flexible at low temperatures
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Technomelt 0430(Henkel)Suitable for bonding expanded polystyrene, polyethylene, and urethane foams. Can be used in applications where solvent-based aerosols are used. Available in natural and red.
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Viscosity Test Methods
| Viscosity | Test Method | Temperature |
|---|---|---|
| 2,875 cPs | Brookfield Thermosel Viscometer in Centipoise. | 191°C |
Work / Pot Time Test Methods
| Work / Pot Time | Test Method |
|---|---|
| 0.83 min | 1/8" semicircular bead, Douglas Fir to Douglas Fir. |
Softening Point Test Methods
| Softening Point | Unit Test Method |
|---|---|
| 86°C | ASTM E-28-99 |
| 86°C | ASTM E28-67 |
Shear Strength Test Methods
| Shear Strength | Substrate | Test Temperature |
|---|---|---|
| 375 psi | Douglas Fir | 22°C |
Tensile Strength Test Methods
| Tensile Strength | Test Temperature |
|---|---|
| 360 psi | 22°C |
Peel Strength Test Methods
| Peel Strength | Substrate | Test Temperature |
|---|---|---|
| 13 piw | Canvas bonded to Douglas Fir | 22°C |
High Temperature Resistance Test Methods
| High Temperature Resistance | Test Method |
|---|---|
| 54°C | Highest temperature that the adhesive will support a 2 psi dead load |
Flash Point Test Methods
| Flash Point | Test Method |
|---|---|
| 288.0°C | ASTM D 92-72 |
