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6640 NMN Nomex iwe polyester film rọ iwe idabobo apapo
6640 Polyester film/polyaramide fiber paper rọ laminate (NMN) jẹ iwe idabobo idabobo ti o ni irọrun mẹta-Layer ninu eyiti ẹgbẹ kọọkan ti fiimu polyester (M) ti wa ni asopọ pẹlu ọkan Layer ti polyaramide fiber paper (Nomex). O tun n pe bi 6640 NMN tabi F kilasi NMN, iwe idabobo NMN ati iwe idabobo NMN.