I. Selection & Project Matching
Q1: How to quickly determine which type of waterborne adhesive to use?
- Paper box sealing / high-speed box folding: Use Waterborne Sealing Adhesive, featuring fast drying, high efficiency, and machine compatibility. Passing standard: “fiber tear within 24 hours.”
- Aluminum foil–paper lamination: Use Waterborne Aluminum Foil Adhesive (XF-25 / 25Y). Control oven temperature, coating weight, and paper moisture content.
- PE/PET protective film production: Use Waterborne Protective Film Adhesive (extra high-tack or low-tack). Adjust curing agent and dilution ratio to achieve desired peel strength.
- BOPP film to paper lamination: Use Waterborne Lamination Adhesive; control oven temperature, roller temperature, and pressure to achieve smooth and glossy finish.
- Pressure-sensitive tapes / transfer films: Use Waterborne Pressure-Sensitive Adhesive (PSA); ensure complete drying for long-term adhesion.
- Electrostatic flocking: Use Electrostatic Flocking Adhesive; control voltage, coating weight, and curing time.
All waterborne adhesives are low-VOC, odorless, and solvent-free—ideal for eco-friendly or enclosed environments.
Q2: Can different adhesive systems be mixed?
Not recommended. Mixing different systems (sealing, aluminum foil, PSA, flocking, etc.) may cause adhesion loss, shrinkage, or delamination.
Do not dilute sealing adhesives with water. Avoid contact between pressure-sensitive adhesives and oil-based substances.
II. Key Process Parameters & Application Window
Q3: What are the recommended parameters for aluminum foil lamination?
Oven temperature: 70–95 °C; line speed: 30–50 m/min; coating weight: 5–10 g/m².
Ambient temperature around 25 °C, air humidity 60%, and paper moisture 16–20%.
If humidity is high, reduce line speed or increase temperature.
Q4: What causes “corner curling” during aluminum foil lamination?
Usually excessive coating weight or high paper moisture content. Reduce coating weight or adjust paper moisture.
Q5: What are the key parameters for paper–BOPP thermal lamination?
Oven temperature: 60–95 °C; roller temperature: 60–80 °C; pressure: 8–20 kg.
Pre-dry to about 70–90% to improve gloss and speed, avoiding overflow or bubbles.
Q6: What is the quality standard for sealing adhesive?
A bond achieving fiber tear within 24 hours is considered qualified.
If not achieved, check coating amount, line speed, pressing timing, or varnish adhesion.
Q7: What are common process parameters for electrostatic flocking adhesive?
Coating weight: 100–200 g/m²; electrostatic voltage: approx. 50 kV; curing: 110–150 °C for 2–5 min.
Tip: Add about 3% curing agent N to enhance adhesion and chemical resistance.
III. Quality Stability & Appearance Issues
Q8: What should be checked if the sealing adhesive fails to bond or opens after machine exit?
Inspect line speed, pressing timing, and varnish adhesion.
Switch to a fast-drying type or adjust coating thickness if necessary.
Q9: How to handle unstable tack or residue with protective film adhesive?
Adjust dilution ratio, curing agent dosage, and coating thickness.
“More water → lower tack.” Always conduct a small-scale test on different substrates.
Tip: For metallized or specially coated films, perform compatibility tests first to avoid residue or delamination caused by surface incompatibility.
Q10: Why does the pressure-sensitive adhesive show craters or uneven surface?
Usually due to oily contamination or insufficient drying.
Maintain a clean environment and ensure full drying before lamination.
Tip: Remove old adhesive or residual glue from equipment before coating to ensure smooth film formation and stable bonding.
IV. Troubleshooting & Emergency Advice
Q11: Why does aluminum foil lamination dry slowly or remain tacky?
High humidity, excessive paper moisture, or thick coating layer.
Reduce line speed, increase temperature, or add a pre-drying stage.
Q12: How to deal with bubbles or glue overflow in thermal lamination?
Lower roller temperature, control oven temperature and pressure; avoid heavy single coatings.
Tip: Gradual heating in sections helps maintain even gloss.
Q13: What causes fiber loss or poor feel after electrostatic flocking?
Check voltage, curing time, and coating weight.
Increase curing agent dosage or extend curing time if necessary.
V. Storage, Transportation & Safety
Q14: What are the shelf life and storage requirements?
Typically 6–12 months depending on model. Recommended storage temperature: 5–35 °C.
Avoid freezing, direct sunlight, and keep containers sealed.
Tip: During international transport (e.g., export to Australia), temporary thickening may occur under tropical heat.
This is a physical phenomenon and does not affect performance. After returning to room temperature (≈ 25 °C) and stirring evenly, viscosity and bonding strength will recover.
All products are waterborne and non-hazardous. Safe for sea, air, or land shipping. Use light-shielding outer packaging to prevent long-term sun exposure. Inspect drum lids upon arrival. Products are environmentally compliant, low-odor, and solvent-free.
A:
• Light traffic: after 24 hours
• Heavy traffic: after 48 hours (at normal temperature)
VI. After-Sales & Warranty
Q16: What is the warranty period? Is after-sales service available?
Warranty: 12 months from production date.
If bonding issues are confirmed to result from product quality, free replacement will be provided.
Warranty exclusions include:
- Improper usage ratios or process parameters;
- Mixing with other brands;
- Contaminated or overly moist substrates.
Q17: Does Huacheng provide technical support?
Yes. Huacheng offers remote application guidance, sample testing, and on-site technical training.
It is recommended to conduct small-scale trials under identical conditions before mass production and record parameters to ensure stability.