一、磁带的结构目前使用较广泛的磁带是分层磁带,分层磁带共有二层,一是带基,二是磁层。带基由醋酸纤维素和涤纶制成。磁层的主要成份是氧化铁,三氧化铁形成棕色带,四氧化三铁形成黑色带。用醋酸纤维素做的磁带具有一定的坚牢度,断裂时不延伸,带基表面平滑,但机械强度差,易于吸潮,在高温下软化,在干燥空气下变脆。用涤纶做的磁带,机械强度和抗张力较好,并耐老化,不易燃,受温、湿度影响较小,但电阻率较高,从 First, the structure of the tape Currently used in a wider range of tape is a tiered tape, a total of two tiered tape, tape base, the second is the magnetic layer. Tape base made of cellulose acetate and polyester. The main component of the magnetic layer is iron oxide, iron oxide to form a brown band, ferroferric oxide to form a black band. Tapes made of cellulose acetate have a certain degree of fastness, do not extend at break, have a smooth base surface, but are poor in mechanical strength and tend to absorb moisture, soften at high temperatures and become brittle in dry air. Made of polyester tape, mechanical strength and good tensile strength, and anti-aging, non-flammable, less affected by temperature and humidity, but higher resistivity, from