Material Analysis
11 조회수
Burnt odor in PET bottles after blowing
문제 현상
The finished bottles carry an obvious burnt odor, which may contaminate the flavor of the contents after filling; drinking water products are especially sensitive to this.
원인 분석
Excessively high heating temperature causes PET thermal decomposition producing odorous substances; unclean compressed air carries an oily smell; using inferior or severely degraded raw material also produces burnt odor.
해결 방법
①Lower the bottle blowing heating temperature; ②tidy up the air compressor and filters to ensure a clean air source; ③switch to qualified raw material from regular manufacturers; ④check the temperature uniformity of the heating lamp box.
핵심 요약
Burnt odor is a signal of thermal degradation or contamination and is a flavor safety defect; control temperature, purify the air, and select good material in a three-pronged approach, and batches with odor should be isolated for evaluation.
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