本文研究了双折射法测定聚乙烯挤出单丝取向度的方法与实际应用。

In this paper, the birefringence method and its practical USES for measurement of orientation degrees of Polyethylene monofilaments have been investigated.

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使用同时具有结构性双折射和分子取向性双折射这两者的结构体作为相位差膜。

A structure provided with both a structural birefringence and a molecular orientational birefringence is used as the phase difference film.

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随着喷丝孔孔径的增大，涤纶poy单丝直径增大，单丝的取向度降低，双折射率减小。

While increasing the diameter of spinneret hole, the filament diameter of PET POY was increased, both the orientation and the birefringence of PET filament were decreased.

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