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爲什麽有些纏繞膜顔色是淡黃色

作者：閱讀量：发布日期：2020/3/25 17:03:17

信息摘要：

爲什麽有些拉伸纏繞膜顔色是淡黃色的呢？正常我們所見到的纏繞膜大都是是透明的，或者純色的，比如黑色、藍色、黃色等彩色的，很少有其他顔色，那麽爲什麽會出現淡黃色的纏繞膜呢？

纏繞膜顔色呈現淡黃色主要是生産時溫度工藝調控造成的，拉伸纏繞膜發展到今天生産工藝已經很成熟，一些廠家會試著改變配方來生産不同性能的拉伸膜，主要反映在三個方面：顔色、拉伸率和自粘性，單一的顔色改變不一定影響拉伸膜的使用，要知道很多時候由于加工設定的熔融溫度不同，會引起拉伸膜顔色的變化，但是不會影響透明度，這樣的就是好的拉伸膜，如果拉伸率和自粘性能下降，就是差的拉伸膜，可能摻了他雜質。

其實嚴格來說拉伸膜只有無色和彩色兩種，出現淡黃色主要是dov、色母等添加劑或者加工工藝改變造成的，如果顔色淺，拉伸率和自粘性不受影響的話可以使用，如果顔色不自然，一般質量就會很差。

如果纏繞膜的顔色是淡黃色，但是透明度、拉伸率、自粘性沒有變化，而且沒有異味，可以使用，如果四個指標出現變化，就不要再用了。

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爲什麽有些纏繞膜顔色是淡黃色

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