Thermoplastic adhesives supplied in solid cylindrical “sticks” that melt when heated in a hot-glue gun. Once applied, they solidify on cooling to form an instant, high-strength bond.
Common Sub-Types & Examples:
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Ethylene-Vinyl Acetate (EVA): The most widespread general-purpose formulation, offering good tack and bond strength (e.g. Bostik® Easy Melt).
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Polyolefin: Provides higher heat resistance and shear strength for more demanding applications.
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Polyamide (Nylon-Based): Delivers superior bond strength and flexibility; resistant to moisture and chemicals (e.g. Surebonder® Industrial Grade).
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Styrenic Block Copolymer (SBC): Offers enhanced flexibility and adhesion to difficult substrates like fabrics and foams.
Key Characteristics to Consider:
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Melting Point & Operating Temperature: Ranges typically from 110 °C to 200 °C; match to your glue gun and application heat requirements.
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Open Time: The period during which the adhesive remains fluid enough for repositioning (usually 10–60 seconds).
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Set & Cure Time: How quickly the bond reaches handling strength—often 1–5 minutes.
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Bond Strength & Durability: Tensile and shear strength, as well as resistance to impact and vibration.
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Viscosity & Flow: Determines how well the molten glue spreads and fills gaps.
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Substrate Compatibility: Ensure the formulation adheres to materials such as wood, plastics, metals, fabrics or ceramics.
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Flexibility vs. Rigidity: Select flexible grades for dynamic joints or rigid grades for structural bonds.
