袋子的耐冲击性能差，运输、装卸、货架摆放过程中容易受到外来力的破坏，极易出现破袋、开袋现象，不但影响包装产品的外观，同时也不能起到包装本身应有的作用；

The impact resistance of the bag is poor, and it is easy to be damaged by external forces during transportation, loading and unloading, and shelf placement. It is easy to break the bag and open the bag, which not only affects the appearance of the packaged product, but also cannot play the role of the packaging itself;

包装袋本身的爽滑性不好，生产过程中表现为开口性较差，生产效率低，同时也会使包装袋的使用率降低，对成本造成浪费；

The smoothness of the packaging bag itself is not good, and the opening is poor in the production process, and the production efficiency is low. At the same time, the use rate of the packaging bag will be reduced, and the cost will be wasted;

包装袋的热封强度不够、热封温度过高造成热封层的损害现象，造成包装袋的保护性能降低，内容物的保质期大大缩短，使内容物达不到相应的保质期；

The insufficient heat sealing strength and high heat sealing temperature of the packaging bag cause the damage of the heat sealing layer, resulting in the reduction of the protective performance of the packaging bag, and the greatly shortened shelf life of the contents, so that the contents can not reach the corresponding shelf life;

包装袋层间剥离强度小、拉断力不够，包装袋的力学性能较差，造成包装袋分层、包装袋不能够达到应有的承重作用，对内容物不能起到有效的保护作用；

The peeling strength between layers of packaging bags is small, the breaking force is not enough, and the mechanical properties of packaging bags are poor, resulting in the layering of packaging bags, the packaging bags can not achieve their due load-bearing function, and the content can not play an effective protection role;

速冻食品的耐寒性达不到要求，在温度较低的情况下，不能保持材料原有的性能，包装材料较脆，使包装材料力学强度下降，造成包装袋破裂及开裂，更不能满足对内容物的保护作用；、

The cold resistance of quick-frozen food can not meet the requirements. Under the condition of low temperature, it can not maintain the original performance of the material. The packaging material is brittle, which reduces the mechanical strength of the packaging material, causes the packaging bag to crack and crack, and can not meet the protection function of the content;

包装袋易撕口的作用不能有效发挥，撕裂强度太大造成包装袋不易开口，撕裂强度太小造成包装袋力学性能降低，所以既要满足包装袋易撕口的人性化设计，同时也要完成产品的保护作用；

The function of the easy-to-tear mouth of the packaging bag cannot be effectively played. Too large tear strength makes the packaging bag difficult to open, and too small tear strength reduces the mechanical properties of the packaging bag. Therefore, it is necessary to meet the humanized design of the easy-to-tear mouth of the packaging bag, and also to complete the protection of the product;

包装袋的穿刺性能，速冻食品冷冻后一般比较坚硬，特别是鱼、肉制品，含有骨头及硬质物体，运输及堆放中产品挤压很容易使包装袋穿破，使包装袋密封性造成破坏，因此速冻食品对包装袋的穿刺性要求很高。

The puncture performance of the packaging bag is generally relatively hard after freezing, especially for fish and meat products, which contain bones and hard objects. It is easy to break the packaging bag and damage the sealing of the packaging bag when the products are squeezed during transportation and stacking. Therefore, the puncture performance of the packaging bag for quick-frozen food is very high.