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How 3A molecular sieve powder used for automotive industry
Table of Contents
Customer Background
A leading automotive interior manufacturer specializing in high-performance PU adhesives for dashboards, seats, and ceilings faced curing issues caused by moisture interference.
Challenges
PU adhesives easily absorb moisture, leading to CO₂ bubbles during curing, poor appearance, and weak bonding. Traditional desiccants lacked uniform dispersion and affected adhesive flow.
Customer Needs
Fast moisture removal
Stable adhesive properties
No change to existing production process
Solution
Recommend adding 3A molecular sieve powder (activated) to the PU formula:
Dosage: 0.5%–1.5% of total weight, adjustable by humidity
Method: Premix into polyol component for even dispersion
Activation: Heat at 250°C for 2 hours before use
Results
– 95% bubble reduction, improved surface quality
– 30% longer pot life, better application stability
– 20% higher peel strength, meeting auto-grade standards
– 12% cost savings, less rework and waste
Customer Feedback
“3A powder solved our moisture issues. Great compatibility and efficiency—now used across more product lines.”
Application Tips
Ideal for 2K PU and moisture-curing 1K PU adhesives
Use sealed mixing systems to prevent secondary moisture exposure
Ideal for industries like automotive, electronics, and construction.
As scavenger in PU system related sealants, coatings, adhesives and paintings
As filling material in food, medicine, cosmetics, plastic, rubber, paint, insulating glass, electronics components and more