异形叶是在正常条件下发育生长的植物茎轴上,作为一种种的特征生出二种以上不同形态叶的现象称为异叶性,其叶称为异形叶。
叶子有同形叶(homomorphic leaf)和异形叶(heteromorphic leaf)之分,前者形状相同,没有营养叶和孢子叶之分;后者分孢子叶和营养叶,且形状不同。
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计算不同叶长,叶宽,孔数的喷丝板毛细孔的当量直径,单孔流量,剪切速率,喷头拉伸比,三叶异形孔压力降和异形度。
The diameter, flow, shear rate, draw ratio, pressure difference and degree of profile in different configuration of capillary hole were calculated.
试验表明,在相同纺丝条件下,涤纶三叶异丝的断裂强伸度和初始模量随丝条异形度的提高而降低,而断裂强伸度变异系数、沸水收缩率和条干不匀率却随之增大。
The test has shown that as the degree of profile increases, the initial modulus and the breaking strength and elongation of profile yarn decreases. We have also quined the findi...
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