Beyond manual glue guns, hot-melt processes rely on automated systems: solid adhesive is melted inside the unit, conveyed through temperature-controlled hoses and precision guns, then pressed onto the substrate for a secure bond. By application pattern, these systems fall into three families—spray, doctor (scrape), and roll—each subdivided into eight proven techniques.

Roll Coating

Molten adhesive flows into a rotating reservoir; a metering blade sets thickness before the roll transfers a uniform film onto textiles or panels—ideal for furniture edge-banding and fabric lamination.

Foam Coating

Nitrogen is injected into molten pressure-sensitive adhesive to create a lightweight, cushioning foam. The foam is sprayed through nozzles, replacing traditional rubber gaskets in automotive assemblies.

Spiral Spray

Compressed air forces adhesive through micro-orifices to form consistent spiral filaments. This pattern cuts adhesive consumption sharply and is the standard for diaper and sanitary-napkin structural glues.

Slot-Die Doctor Coating

Adhesive is distributed evenly through heated manifolds to a slot die that extrudes a precise, continuous film—perfect for labels and pressure-sensitive films.

Dot Spray

High-speed, intermittent dots give pinpoint accuracy and cost efficiency, commonly used for folding cartons and selective board bonding.

Bead Spray

Continuous linear beads with adjustable width reinforce cosmetic or wine boxes, balancing aesthetics and strength.

Curtain Coating

A non-contact, falling-curtain film covers substrates with low heat tolerance or uneven surfaces, ensuring uniform coverage without pressure.

Fiber Spray

Random ultra-fine filaments deposit the lowest adhesive weight. This technique is the go-to for lightweight disposables: medical pads, surgical gowns, caps and shoe covers.

These eight processes span textiles, furniture, automotive, packaging and hygiene sectors. Parameters can be tuned to substrate type, adhesive volume and performance targets for efficient, accurate, low-cost hot-melt applications.

JiaYuan Machinery has specialized in hot-melt equipment for twenty years. The product portfolio includes:

Hot-melt coaters for high-speed film/paper applications

Hot-melt laminators for multi-layer bonding

Hot-melt sprayers offering spiral, fiber and foam modes

Pressure-sensitive label coaters for release paper/film

Roller, slot-die and curtain modules tailored to substrate and adhesive type

From standard units to complete turnkey lines, JiaYuan delivers one-stop hot-melt solutions.