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信紙信封

名稱:信紙信封
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信封,一般是指人們用于郵遞信件、保守信件內容的一種交流文件信息的袋狀裝置。信封一般是制作成長方形的紙袋。
一、信封規格: 
  國內標準信封規格有(正面的長×寬):  
  2號(B6)信封:176×125mm 
  5號(DL)信封:220×110mm  
  6號(ZL)信封:230×120mm 
  7號(C5)信封:229×162mm  
  9號(C4)信封:324×229mm 
  因為信封這種形式廣泛用于生產生活中,不只是用來裝信,象紅包袋、光盤袋、紐扣袋、眼鏡袋等紙袋,以及出口國外的眾多形式,都是非標準的。
二、信封樣式:   
  中式信封:短邊開口   
  西式信封:長邊開口  
  菱形信封:主要用于裝賀卡   
  檔案袋:邊上有2-4cm的起墻  
  開窗信封:如銀行對帳單信封、CD袋等等  
  特種電腦信封:主要為便于機器識別,在信封上做些對應的圓孔等等。 
三、信封封口形式:  
  無膠封口信封:國內信封的普通形式  
  口水膠封口信封:國外信封的常用形式,封口處涂有口水膠  
  自粘膠封口信封:封口處涂有自粘膠   
  不干膠封口信封(離型紙信封):封口處涂有不干膠,上貼離形紙  
四、信封用紙: 
   一般采用80g-150g的雙膠紙、牛皮紙(本色牛皮紙、白色牛皮紙),根據不同的功用,也有用藝術紙、銅版紙等等。   信封機的運行要求紙張必須具備較高的抗張強度和撕裂度,以免斷紙、開裂。 
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