在快節奏的生活里，外賣成為不少人的用餐選擇。但當打開包裝發現湯汁四溢，難免影響心情。一次性外賣打包盒想要打好 “防漏保衛戰”，需要在多個設計細節上下足功夫，每一處巧思都是防止滲漏的關鍵。

　　In the fast-paced life, takeout has become a dining choice for many people. But when you open the packaging and find the soup overflowing, it inevitably affects your mood. To effectively defend against leakage in disposable takeaway packaging boxes, it is necessary to put in a lot of effort into multiple design details, and every clever idea is the key to preventing leakage.

　　盒體與盒蓋的密封結構是防漏的第一道防線。常見的扣合式設計中，盒體邊緣通常設有凸起的卡槽，盒蓋對應位置則有向內凹陷的卡扣，二者精準咬合。為了增強密封性，卡扣與卡槽的接觸面會設計成鋸齒狀或波浪形，增加摩擦力的同時減少縫隙。一些高端設計還會在盒蓋內側加裝一圈軟質密封條，材質多選用食品級硅膠或彈性塑料，當盒蓋扣合時，密封條緊密貼合盒體邊緣，如同給盒子戴上了 “防漏口罩”，哪怕遇到顛簸晃動，湯汁也難以滲出。

　　The sealing structure between the box body and the box cover is the first line of defense against leakage. In common snap fit designs, the edges of the box body are usually equipped with raised slots, and the corresponding positions of the box cover have inward recessed buckles, which precisely engage with each other. In order to enhance sealing, the contact surface between the buckle and the slot will be designed in a serrated or wavy shape, increasing friction while reducing gaps. Some high-end designs also add a soft sealing strip on the inside of the box cover, often made of food grade silicone or elastic plastic. When the box cover is closed, the sealing strip tightly adheres to the edge of the box body, like putting a "leak proof mask" on the box. Even if it encounters bumps and shakes, the soup is difficult to seep out.

　　盒體的結構設計同樣不容忽視。底部的弧度和厚度對防漏至關重要。打包盒底部通常會設計成微微向內凹陷的弧形，這樣的造型能讓液體自然向中心匯聚，避免因晃動流向盒壁縫隙處。同時，底部厚度會適當增加，一般比盒身其他部位厚 20% - 30%，增強承重能力和抗沖擊性，防止因外力擠壓導致底部破裂滲漏。對于盛裝湯汁較多的菜品，盒體還會采用分層設計，上層放置固體食物，下層專門設置密封的湯盒區域，彼此獨立，即便湯盒輕微晃動，也不會影響上層食物，從空間布局上降低滲漏風險。

　　The structural design of the box cannot be ignored either. The curvature and thickness of the bottom are crucial for leak prevention. The bottom of the packaging box is usually designed with a slightly inward concave arc shape, which allows the liquid to naturally converge towards the center and avoid flowing towards the gaps in the box wall due to shaking. At the same time, the thickness of the bottom will be appropriately increased, generally 20% -30% thicker than other parts of the box body, to enhance load-bearing capacity and impact resistance, and prevent bottom rupture and leakage caused by external compression. For dishes with a lot of soup, the box body will also adopt a layered design, with solid food placed on the upper layer and a sealed soup box area set up on the lower layer, independent of each other. Even if the soup box shakes slightly, it will not affect the upper layer of food, reducing the risk of leakage from the spatial layout.

　　材質的選擇直接影響防漏效果。優質的外賣打包盒多采用高密度聚乙烯（HDPE）或聚丙烯（PP）材質，這類材料分子結構緊密，具有良好的防水性和抗滲透性，能有效阻擋液體滲透。同時，材質的韌性也很關鍵，在受到外力擠壓時，不會輕易出現裂紋。有些打包盒還會在表面進行特殊涂層處理，比如添加納米級防水層，讓液體在盒體表面形成水珠狀滾落，進一步提升防漏性能。此外，材質的耐熱性也與防漏相關，高溫食物盛裝時，若材質不耐熱變形，會導致盒體與盒蓋之間的密封結構失效，所以選擇耐高溫的材質是保障防漏的基礎。

　　The choice of material directly affects the leak prevention effect. High quality takeaway packaging boxes are often made of high-density polyethylene (HDPE) or polypropylene (PP) materials, which have a tight molecular structure, good waterproof and anti-seepage properties, and can effectively block liquid penetration. Meanwhile, the toughness of the material is also crucial, as it will not easily crack when subjected to external compression. Some packaging boxes also undergo special coating treatment on the surface, such as adding a nanoscale waterproof layer, which allows the liquid to form water droplets on the surface of the box, further improving the leak proof performance. In addition, the heat resistance of the material is also related to leak prevention. When storing high-temperature food, if the material is not heat-resistant and deformed, it will cause the sealing structure between the box body and the box cover to fail. Therefore, choosing a high-temperature resistant material is the basis for ensuring leak prevention.

　　盒蓋的開啟方式也與防漏息息相關。傳統掀蓋式盒蓋雖然方便開啟，但密封性能相對較弱，為此，不少打包盒采用了旋轉式或按壓式盒蓋。旋轉式盒蓋通過螺紋結構與盒體連接，旋轉擰緊后，盒蓋與盒體緊密貼合，形成多層密封；按壓式盒蓋則通過多個按壓扣均勻分布在盒蓋邊緣，按下時，所有卡扣同時發力，將盒蓋牢牢固定在盒體上。這些設計不僅提升了密封性，還能在一定程度上防止用戶在打開過程中因操作不當導致湯汁灑出。

　　The opening method of the box cover is also closely related to leak prevention. Although traditional flip top box covers are convenient to open, their sealing performance is relatively weak. Therefore, many packaging boxes adopt rotating or pressing box covers. The rotating box cover is connected to the box body through a threaded structure. After being rotated and tightened, the box cover is tightly attached to the box body, forming a multi-layer seal; The press type box cover is evenly distributed on the edge of the box cover through multiple press buckles. When pressed, all the buckles exert force simultaneously, firmly fixing the box cover to the box body. These designs not only enhance sealing, but also to some extent prevent users from spilling soup due to improper operation during the opening process.

　　細節決定成敗，一次性外賣打包盒的防漏設計正是如此。從盒體盒蓋的密封結構，到盒體本身的構造、材質選擇，再到盒蓋開啟方式，每一個環節的精心設計，都是為了守護好餐食的 “完整性”，讓消費者拿到外賣時，感受到的是一份貼心與安心。

　　Details determine success or failure, and the leak proof design of disposable takeaway packaging boxes is just like that. From the sealing structure of the box body and lid, to the construction and material selection of the box body itself, to the opening method of the lid, every carefully designed step is aimed at safeguarding the "integrity" of the food, allowing consumers to feel a sense of care and peace of mind when receiving takeout.

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