Technically Speaking | 2 MAY 2025

Nylon Conditioning

Tech Tips from Our Engineers at Bamberger Amco Polymers

Technically Speaking

Nylon Conditioning

Technically Speaking

Polyamide (Nylon) Part Conditioning, Explained

Post-molding moisture absorption occurs over time in all nylon parts due to the hygroscopic nature of the material.

Key Terms

Dry as Molded (DAM): the lowest moisture content (immediately after molding).

Conditioned: the amount of moisture absorbed by a part, either naturally or through acceleration.

During processing, residual moisture acts as a plasticizer, potentially leading to physical and visual property changes. Molded parts will also absorb moisture from the atmosphere, which may cause swelling and dimensional changes.

Conditioning Methods

The rate at which conditioning occurs depends on factors such as temperature, storage medium, a part's wall thickness, and resin crystallinity. It can take hours, days, or even months.

Passive Conditioning: the part absorbs moisture naturally from its environment without aid.

Active Conditioning: various techniques are applied to accelerate moisture absorption.

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Nylon Conditioning

Polyamide (Nylon) Part Conditioning, Explained

Key Terms

Conditioning Methods

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