Hot Melt Sponge Spray Adhesive — Application & Operation Guide

Non-woven fabric, leather, sponge and other mattress materials

To help our customers achieve the best bonding performance and reduce common application issues, HUJUMP has summarized the standard operating guidelines for using hot melt sponge spray adhesive.

1. Surface Preparation

Before spraying, make sure the surfaces of non-woven fabric, leather, sponge, or other materials are clean and dry.

Remove dust, oil, moisture, or other contaminants to ensure strong and reliable bonding.

2. Spray Technique

When using mechanical spraying, the adhesive should form even spiral-shaped lines.

Apply uniform pressure during lamination; insufficient or uneven pressure may lead to poor bonding or partial delamination.

3. Standard Operating Process

1. Melt the adhesive in the hot melt tank at 150–175 °C.

2. Spray the adhesive (automatic or manual spray gun).

3. Press and laminate the materials together (automatic or manual press).

4. Allow to cool and set for a stable bond.

4. Recommended Machine Settings

• Tank temperature: 150–175 °C

• Hose temperature: 155–180 °C

• Nozzle temperature: 160–185 °C

• Air pressure: 5–8 kg/cm²

• Glue output: 30%–60% of max capacity

Adjust air pressure and glue volume based on material:

• For sponge or highly porous fabrics, increase both air pressure and adhesive amount appropriately.

Adjust temperature according to weather:

• Winter: set temperature 5–10 °C higher than summer.

• Make changes gradually (+5 °C at a time) and wait 15–20 min to observe spray quality.

5. Common Spray Issues & Solutions

⚠️ No glue output or thin spider-web threads:

• Possible causes: temperature too low, insufficient air pressure, glue output too small, nozzle clogged.

• Solution: increase temperature, air pressure, glue volume, and clean or replace nozzle.

⚠️ Glue blobs or dripping after stopping spray:

• Possible causes: temperature too high, air pressure too high, excessive glue output, damaged nozzle/valve.

• Solution: lower temperature, air pressure, glue output; replace nozzle/valve if needed.

⚠️ Heavy smoke or strong odor:

• Possible causes: temperature too high, heater circuit failure, glue contaminated.

• Solution: lower temperature, repair circuit, clean tank, or contact service team.

⚠️ Poor bonding after lamination:

• Possible causes: surface dirty, insufficient glue, poor pressing, too long delay before lamination.

• Solution: clean material surface, increase glue amount, apply correct pressure, laminate within 3–5 minutes.

💡 HUJUMP Tips

• Keep your spray gun and hot melt tank clean and well-maintained.

• Avoid too thin glue layers (weak adhesion) or too thick layers (slower curing & waste).

• Test temperature and pressure before full production to ensure consistent bonding.

💬 Need technical support or have special application requirements?

Contact our HUJUMP team — we’re ready to help you achieve the best adhesive results.