食品真空包裝設計及外真空包裝材料原因

食品真空包裝設計方面，如內(nèi)容物的凈含量或體積超過了所用軟包裝材料的承受范圍，在運輸或銷售流通過程中，稍受外力，就會出現(xiàn)破袋、開裂問題。一般作為抽真空包裝袋熱封層，材料厚度不得低于50?m厚。

In terms of food vacuum packaging design, if the net content or volume of the content exceeds the tolerance range of the soft packaging materials used, slight external forces may cause bag breakage and cracking during transportation or sales circulation. Generally used as a heat sealing layer for vacuum packaging bags, the material thickness should not be less than 50? M thick.

食品真空包裝材料的質(zhì)量問題導致成品包裝出現(xiàn)封口開裂問題，一般集中在以下幾個方面：

The quality issues of food vacuum packaging materials have led to sealing and cracking problems in finished product packaging, which are generally concentrated in the following aspects:

食品包裝的物理機械性能——如拉斷力與斷裂伸長率、抗穿刺強度、抗擺錘沖擊性能、剝離強度等，可綜合判斷包裝袋的韌性、耐穿刺性、抗沖擊性等物理機械性能是否符合包裝、儲存堆碼及運輸過程的需求。(與內(nèi)容物、包裝袋的大小、運輸路途及包裝形式有關)

The physical and mechanical properties of food packaging, such as tensile strength and elongation at break, puncture strength, pendulum impact resistance, peel strength, etc., can comprehensively determine whether the physical and mechanical properties of packaging bags, such as toughness, puncture resistance, and impact resistance, meet the requirements of packaging, storage, stacking, and transportation processes. (Related to the content, size of packaging bags, transportation route, and packaging form)

食品包裝的密封性一一如爆破壓力測試，可以確定發(fā)生破袋的位置和機械強度薄弱的部位。如熱封強度測試可判斷熱封強度是否滿足食品內(nèi)容物的要求，并確定熱封不良的部位以及熱封效果的均勻度。例如雞爪真空包裝產(chǎn)生破損是因為雞爪被切分的時候，有些碎爪的骨頭被切的很尖，再加上煮沸的時候，肉皮收縮，所以骨頭就裸露出來，在運輸?shù)倪^程中容易將袋子扎破。因此，包裝袋的耐穿刺性應做為包裝材料組合的考慮。

The sealing of food packaging, such as burst pressure testing, can determine the location of bag breakage and the areas with weak mechanical strength. The heat sealing strength test can determine whether the heat sealing strength meets the requirements of food content, and determine the areas of poor heat sealing and the uniformity of the heat sealing effect. For example, the damage caused by vacuum packaging of chicken feet is because when the chicken feet are cut, some of the broken bones of the claws are cut very sharply, and when boiled, the skin shrinks, so the bones are exposed, making it easy to puncture the bag during transportation. Therefore, the puncture resistance of packaging bags should be a key consideration for packaging material combinations.

通過泄漏與密封強度測試儀不僅能夠檢測軟包裝袋的zui大破裂力，還能通過設定施加的壓力來測試包裝袋的破裂時間，可以根據(jù)測試數(shù)據(jù)設計堆放結構，進一步調(diào)整熱封工藝的參數(shù)以改善包裝效果，或者根據(jù)軟包裝袋破裂的位置對包裝結構上存在的問題進行分析。

The leakage and sealing strength tester can not only detect the maximum rupture force of flexible packaging bags, but also test the rupture time of packaging bags by setting the applied pressure. Based on the test data, the stacking structure can be designed, and the parameters of the heat sealing process can be further adjusted to improve packaging effectiveness. Alternatively, problems in the packaging structure can be analyzed based on the location of the rupture of the flexible packaging bag.

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