Viscoelastic and shrinkage characteristics of alternative substrates for magnetic tapes are presented. The substrates evaluated include two polyesters (PET and PEN), an aromatic polyamide (ARAMID), a polyimide (PI), and poly(benzoxazole) or PBO. Thicknesses of the films range from 14.4 /spl mu/m for PET to 4.4 /spl mu/m for ARAMID. Results are also presented for ultra-thin magnetic tapes which use PET, PEN, or ARAMID as substrates. Based on their creep behavior (and relative cost), PEN or ARAMID appear to be suitable alternative substrates to PET.
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机译：提出了用于磁带的替代基材的粘弹性和收缩特性。评估的基材包括两种聚酯（PET和PEN），芳族聚酰胺（ARAMID），聚酰亚胺（PI）和聚（苯并恶唑）或PBO。薄膜的厚度范围从PET的14.4 / spl mu / m到ARAMID的4.4 / spl mu / m。还显示了使用PET，PEN或ARAMID作为基材的超薄磁带的结果。基于它们的蠕变行为（和相对成本），PEN或ARAMID似乎是PET的合适替代基材。
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