? 影響熱收縮膜熱封強度的因素 - 企業新聞 - 建材專用收縮膜、彩色印刷收縮膜、藥用捆扎膜、PVC熱收縮膜、PE熱收縮膜、啤酒、飲料專用膜、食品級PE熱收縮膜、纏繞膜、POF熱收縮膜、冷縮膜、拉伸套管、冷拉伸套管、冀中能源邢臺礦業集團有限責任公司金興塑料包裝分公司
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      1. 企業新聞

        影響熱收縮膜熱封強度的因素

        發布時間:2014-09-11 10:02:34點擊數:1716

        伴隨著食品、化妝品、醫藥等行業的飛速發展,促使對塑料復合包裝產品的需求量日益增長,同時對塑料復合包裝產品的質量要求也越來越高。包裝用戶不僅僅注重包裝產品的美觀和物流性能,而且注重包裝產品的熱封強度。因為包裝產品的熱封強度直接影響到包裝速度、運輸以及銷售。
        在實際生產中,各生產廠家無論是對制袋產品還是用于自動包裝生產線的卷材產品,都把熱封強度作為一個最重要的質量指標來控制。下面結合實際生產中的經驗,對影響熱收縮膜熱封強度的因素作一個簡單分析:

        1、熱封溫度:熱封溫度直接影響著塑料復合包裝產品的熱封強度。
        2、熱封時間:自動包裝機或老式制袋機的熱封時間是由機速決定的。在熱封溫度和熱封壓力不變的情況下,熱封時間越長,熱封層之間結合得越牢固。但如果熱封時間過長,復合薄膜的熱封部位則會出現褶皺、不平現象,嚴重影響產品的外觀質量。
        3、熱封壓力:為了保證塑料復合軟包裝的熱封強度,一定的熱封壓力是必不可少的。因此,在熱封過程中要求熱封壓力適中、均勻。如果熱封壓力不夠或不均勻,則會使熱封部位產生氣泡而·虛焊,導致熱封不良。

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