Material Drying
4 조회수
High Brittleness of PA Products Just After Demolding or in Dry State
문제 현상
PA products are very brittle just after demolding or in the dry state, the impact strength is far lower than in the wet state, and brittle fracture easily occurs
원인 분석
In the dry state of polyamide 410 (bio-based long carbon chain nylon), the hydrogen bonds between molecular chains are highly rigid and lack water molecule plasticization
Excessive drying and too low moisture content
Used directly after demolding without conditioning
The product wall thickness is thin, the rigidity is low, and the brittleness is more obvious
Dry-state embrittlement is aggravated in low-temperature environments
해결 방법
Perform conditioning treatment after demolding (bring the moisture content to 1.5-2.5% in water or a hot and humid environment)
Avoid excessive drying and maintain reasonable moisture content
Avoid applying force to products just after demolding
Thin-walled products need extended conditioning time
Avoid using dry-state products in low-temperature environments
핵심 요약
PA dry-state embrittlement requires conditioning and plasticization treatment
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