Material Drying
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PA56 Moisture Absorption Lower Than PA6
Problem Phenomenon
The moisture absorption of PA56 is lower than that of PA6, but the dimensional stability advantage is not obvious in some applications
Cause Analysis
The moisture content of PA56 is about 1-2%, lower than that of PA6 at 1.5-3%, but conditioning is still required
The low moisture absorption advantage is not utilized in design, and the expansion allowance reserved is too large
The conditioning process follows PA6 parameters and does not match PA56
The dimensional stability of PA56 is improved but not fully reflected
PA56 will still absorb moisture significantly when the ambient humidity is extremely high
Solution
Reserve an allowance according to the actual moisture absorption rate of PA56 (1-2%) during design
Formulate a special conditioning process for PA56
Fully utilize the low moisture absorption advantage to design more precise products
Moisture absorption still needs to be considered in high-humidity environments
Compare with PA6 to verify the dimensional stability improvement
Key Takeaway
The low moisture absorption of PA56 requires special conditioning and design allowance
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