Q1: Which industries is it suitable for?

A: It is widely used in packaging (carton sealing, gift boxes), hygiene products (diapers, sanitary napkins), automotive interiors, furniture edge banding, labels and tapes, filter materials, medical protective clothing, and other industries.

Q2: What types of Hot Melt Adhesives can be coated?

A: Compatible with mainstream hot melts including EVA (Ethylene-Vinyl Acetate), PO (Polyolefin), PUR (Reactive Polyurethane), and APAO (Amorphous Polyolefin). Equipment parameters must be matched according to the melting point and viscosity of the adhesive.

Q3: Is the coating width and thickness customizable?

A: Yes. Coating width can be adjusted via adjustable doctor blades or die heads (e.g., 10 mm ~ 1000 mm). Thickness is controlled by precision metering pumps, blade gap adjustment, or roller pressure, with a typical range of 0.01 mm ~ 2 mm.

Q4: What is the operating speed?

A: Standard models feature a line speed of 5–150 m/min; high-speed models can exceed 300 m/min. Actual speed depends on adhesive viscosity, coating thickness, and substrate properties.

Q5: What is the temperature control range?

A: Standard temperature control ranges from ambient temperature to 200 °C. High-temperature models can reach 230 °C (suitable for PUR adhesives). Control accuracy is typically ±1–2 °C to ensure stable adhesive fluidity.

Q6: How is coating accuracy and uniformity guaranteed?

A: Ensured by the following technologies:

High-precision gear pump: output error ≤ ±1%;

Constant temperature system: eliminates viscosity fluctuations;

Distribution roller / doctor blade: ensures uniform coating;

Closed-loop tension control: prevents substrate wrinkling.

Q7: Is operation complicated? How many operators are required?

A: Modern models are equipped with a touch-screen PLC control system supporting parameter presetting and one‑key start/stop.

Regular production requires only 1 operator. Complex processes such as adhesive change or die replacement require 2 operators.

Q8: How to clean the equipment? What is the cleaning frequency?

A: Daily shutdown: Flush the glue tank and pipelines with special purging adhesive or hot melt cleaner;

Weekly / when changing adhesive: Disassemble nozzles and filters for soaking and cleaning;

Severe carbonization: Requires professional high-temperature decomposition cleaning.

Note: Avoid highly corrosive solvents!

Q9: How to prevent hot melt adhesive carbonization?

A: Key measures:

Precise temperature control: Avoid local overheating (equipped with multi-point temperature sensors);

Nitrogen protection system: Inject nitrogen into the glue tank to isolate oxygen;

Reduce adhesive residence time: Empty the tank if shutdown exceeds 30 minutes;

Regular cleaning: Remove carbon deposits and residues.

Q10: What to do if no adhesive is dispensed after startup?

A: Troubleshoot in the following order:

Temperature check: Ensure the tank, pipelines, and nozzle reach the set temperature;

Blockage check: Inspect filters and nozzles for clogging (clean with a needle);

Pump/valve inspection: Verify metering pump operation and solenoid valve opening;

Adhesive level: Refill to the safe working level.

Q11: How to extend the service life of the equipment?

A:Regular maintenance: Inspect heaters, sensors, and pump seals monthly;

Standardized operation: Avoid overloading; clean thoroughly before shutdown;

Use genuine consumables: Replace original filters and seals;

Environment control: Maintain a dry, low-dust working environment.

Q12: How to select the right model?

A: Based on the following factors:

Coating process: Dot coating, spray coating, roll coating, or knife coating?

Production requirements: Speed, accuracy, thickness range;

Adhesive type: EVA/PO/PUR require different temperature control systems;

Integration requirements: Whether to connect with production lines (communication protocols such as RS485)?

Q13: Can the machine be compatible with different types of hot melt adhesives?

A: Yes, provided that:

The equipment's temperature range covers the adhesive's melting point (e.g., PUR requires over 200 °C);

The adhesive path is thoroughly cleaned to avoid cross-contamination;

Corresponding components are replaced: high-viscosity adhesives require high-flow gear pumps.

Q14: Does it support multi‑purpose use on one machine?

A: Selected models support multi‑function switching via quick‑change die heads:

Same production run: Only adhesives with similar melting point and viscosity are allowed;

Different substrates: Must match the tension system (e.g., film vs. non-woven fabric).

Q15: How long does preheating take?

A: Approximately 20–40 minutes for cold start (depending on equipment power and ambient temperature). Insulated models or standby mode can shorten preheating to under 10 minutes.

Q16: How to precisely control coating thickness?

A: Using:

Servo-driven metering pump: adhesive volume accuracy ±0.5%;

Fine-adjustable blade gap: resolution 0.01 mm;

Online thickness detector (optional): real-time feedback and adjustment.

Q17: Does it support intermittent (breakpoint) coating?

A: Yes. Through PLC programming to control glue valve on/off, synchronized with conveyor positioning signals, achieving accurate breakpoint length (minimum interval down to 1 mm).

Q18: How to prevent nozzle clogging?

A: Mandatory cleaning after shutdown: Flush with purging adhesive/cleaner until no residue remains;

Nozzle insulation: Independent temperature control to prevent low-temperature solidification;

Dustproof protective cap: Cover the nozzle when not in use;

Use anti-drip nozzles.

Q19: Can it run continuously for a long time? How to prevent overheating?

A: Supports 24/7 continuous operation; industrial‑grade design life ≥ 50,000 hours.

Overheating protection:

Air/water cooling system for key components;

Automatic shutdown on abnormal temperature;

Zoned temperature control in the glue tank to reduce heat buildup.

Q20: Can it be integrated with a production line?

A: Yes. Support includes:

Physical docking: Custom frame to match line height and width;

Communication integration: Standard RS232/RS485, Ethernet, Modbus protocol supported;

Signal synchronization: Receives PLC start/stop and speed signals for synchronized control.

Q21: Is energy consumption high? Is there an energy-saving mode?

A: Power range: Small machines ~3–5 kW, large lines 10–20 kW.

Energy-saving features:

Insulation layers reduce heat loss (over 30% energy saving);

Automatic temperature reduction in standby mode;

Variable-frequency drive for pumps and fans.

Q22: Does it comply with environmental standards? Does it support eco-friendly adhesives?

A: Equipment standards: Complies with CE / RoHS electrical safety and environmental requirements;

Eco-adhesive compatible: Supports solvent-free hot melts, bio-based degradable adhesives (e.g., certain PO types);

VOC control: Closed glue tank + optional exhaust recovery system.