GB/T 4611-2008
ActiveDetermination method of "fish eyes"for polyvinyl chloride resins of general use
通用型聚氯乙烯树脂“鱼眼”的测定方法
Application Summary AI generated
This standard specifies a method for detecting and quantifying "fish eyes"—transparent, hard particles—in polyvinyl chloride (PVC) resins intended for general use. It is applied in quality control laboratories within the plastics manufacturing industry to assess resin purity and processability, particularly for applications like pipes, profiles, and films where visual defects must be minimized. The test involves calendering or pressing the resin into a thin sheet and counting the visible fish eyes under transmitted light.
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