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食品塑料包裝識別方法

Time:2016/11/4 17:48:50 瀏覽次數:9393次

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     食品塑料包裝袋是人們生活中經常要用到的,但是使用的時候也一定要小心,有些塑料包裝袋是有毒的,不可以用來直接裝食物的。
  一、用眼睛觀察法 
  無毒塑料袋呈白色,透明或微透明,質地均勻;有毒塑料袋則為彩色或雖為白色,但透明度差,較渾濁,塑料表面拉伸不均勻,有小顆粒。  
  二、用耳朵聽  
  用手使勁抖動塑料袋時,發出清脆聲表明是無毒塑料袋;而聲音小而悶的便是有毒塑料袋。  
  三、用手摸  
  用手撫摸塑料包裝袋表面,很光滑是無毒的;發粘、發澀、有蠟狀感的是有毒的。 
  四、用鼻子聞  
  無毒的塑料包裝袋是無味的;有刺激氣味或味道不正常的是有毒的。  
  五、沉水試驗法  
  把塑料袋放到水里,用手將其按到水底,稍等片刻,浮出水面的即為無毒塑料包裝袋,沉在水底的即是有毒塑料包裝袋。  
  六、燃燒法 
  無毒的塑料袋易燃,火焰尖端呈黃色,局部呈青色,燃燒時像蠟燭淚一樣滴落,有石蠟味;有毒的塑料袋不易燃燒,離火即熄,火焰尖端呈黃色、或是黑色,底部呈綠色,軟化能拉絲、還可以聞到一股刺鼻的味。
  呼和浩特塑料制品   內蒙古塑料制品

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