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How 3A molecular sieve powder used for automotive industry

Table of Contents

Customer Background

3A molecular sieve powder for automotive adhesive
3A molecular sieve powder adsorbing moisture is ideal for 2K PU and moisture-curing 1K PU adhesives

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

PU adhesive production

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

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