The service life of food packaging boxes is limited. Food packaging boxes undergo a series of treatments during the production process, such as printing, coating, baking, etc. These treatments gradually release chemical substances from the packaging boxes, which may undergo chemical reactions after contact with food, affecting the quality and safety of the food.

食品包装盒通常会在底部或侧面标注使用寿命。这个使用寿命一般是指包装盒在正常条件下的保质期限，超过这个时间后，包装材料可能会发生变化，对食品的保存产生负面影响。例如，一些易氧化的食品，如果包装盒材料中存在过多的氧气，可能会使食品变质。

Food packaging boxes usually have their lifespan marked on the bottom or side. This service life generally refers to the shelf life of the packaging box under normal conditions, beyond which the packaging materials may change and have a negative impact on the preservation of food. For example, some easily oxidized foods may spoil if there is too much oxygen in the packaging box material.

食品包装盒在使用过程中会受到外界环境的影响，如湿度、温度、光照等。湿度较大的环境可能会导致包装盒吸湿变形，产生漏食现象，使食品无法有效地保持原有的品质。温度过高或过低也会使包装盒材料出现变化，影响食品的有效密封性和保鲜效果。光照会导致包装盒材料老化，降低其物理性能。

Food packaging boxes are subject to external environmental factors such as humidity, temperature, and light during use. An environment with high humidity may cause moisture absorption and deformation of the packaging box, resulting in food leakage, making it difficult for the food to effectively maintain its original quality. High or low temperatures can also cause changes in the packaging material, affecting the effective sealing and preservation of food. Light exposure can cause aging of packaging box materials and reduce their physical properties.

包装盒的使用寿命还与食品的性质有关。一些特别敏感的食品，如易变质、易产生变色、异味或产生化学反应的食品，对包装材料的要求更为严格。这些食品可能会要求使用特殊的包装盒，或需要在特定的温度和湿度条件下进行包装和储存。

The service life of packaging boxes is also related to the nature of the food. Some particularly sensitive foods, such as those that are prone to spoilage, discoloration, odor, or chemical reactions, have stricter requirements for packaging materials. These foods may require the use of special packaging boxes or require packaging and storage under specific temperature and humidity conditions.

为了延长食品包装盒的使用寿命，需要合理保管和使用。首先，包装盒应存放在干燥、通风、无异味的环境中，避免受到阳光直射或潮湿的影响。其次，使用包装盒时应注意避免与刀具、尖锐物品等硬物发生摩擦和碰撞，以免损坏包装盒导致食品受到污染。此外，包装盒应按照规定的方法进行密封，避免食品暴露在空气中。

In order to extend the service life of food packaging boxes, it is necessary to properly store and use them. Firstly, packaging boxes should be stored in a dry, ventilated, and odorless environment to avoid direct sunlight or humidity. Secondly, when using packaging boxes, attention should be paid to avoiding friction and collision with hard objects such as knives and sharp objects, in order to avoid damaging the packaging box and causing food contamination. In addition, the packaging box should be sealed according to the prescribed method to avoid food exposure to the air.

总之，食品包装盒的使用寿命是有限制的，这取决于包装盒材料的质量、加工工艺和环境条件等因素。为了保证食品的质量和安全性，我们应该合理选择、储存和使用食品包装盒，以避免因包装盒问题而影响食品的品质和安全。

In short, the service life of food packaging boxes is limited, which depends on factors such as the quality of packaging box materials, processing technology, and environmental conditions. In order to ensure the quality and safety of food, we should reasonably select, store, and use food packaging boxes to avoid affecting the quality and safety of food due to packaging box issues.