1、 Sealing upgrade: dual innovation from structure to material Hot pressed protective edge and double-layer sealing design The zipper of traditional corpse bags and the seam of the bag body are prone to leakage of body fluids or diffusion of odors due to pinholes. The handleless zipper corpse bag seamlessly integrates the zipper with the bag body through hot pressing technology, forming a continuous protective edge. The protective edge extends to the center of the zipper and is equipped with an elastic strip, which enhances sealing and improves the flexibility of zipper opening and closing. Some high-end products adopt a dual zipper design, combined with waterproof coating, to ensure airtightness in environments ranging from -20 ℃ to 50 ℃, effectively blocking bacteria and odors. Application of multi-layer composite materials The bag material has been upgraded from a single PVC to environmentally friendly composite materials such as PEVA, OPP, LLDP, etc. When the thickness of PEVA reaches 0.15mm, it can withstand the weight of a large body size of 320cm × 106cm (about 150kg), while also possessing cold resistance and tear resistance characteristics. 2、 Convenient operation: Simplify processes and improve emergency efficiency Space optimization of handleless design Although the handles of traditional corpse bags are easy to transport, they are prone to entanglement in stacked storage or narrow spaces such as ambulance and airplane cargo holds. The handleless design addresses pain points through the following methods: Directly grasping the edge of the bag body: For short distance handling, the handleless design allows operators to directly grasp the reinforcing ribs on both sides of the bag body (usually using 2cm wide nylon webbing), ensuring load-bearing capacity (≥ 100kg) and avoiding the risk of handle breakage. Quick opening and closing integration with identity recognition Double U-shaped zipper layout: Some products adopt a combination design of top horizontal center opening and side vertical opening, supporting multi person collaborative operation. 3、 Environmental Protection and Safety: Optimizing the Entire Cycle from Production to Disposal The popularization of biodegradable materials Traditional PVC materials may produce dioxins during incineration due to the presence of plasticizers. The handleless zipper body bag is gradually adopting bio based materials, such as corn starch modified PLA (polylactic acid), which shortens its degradation cycle from 200 years for PVC to 180 days. A certain brand of product uses nano titanium dioxide to completely decompose the bag body under light for 6 months, meeting the EU EN13432 biodegradable standard. Integration of Explosion proof and Antibacterial Technologies Unidirectional exhaust valve and activated carbon layer: In response to the gas generated by decaying bodies, some products are equipped with an activated carbon filter layer between the inner and outer bags, combined with a one-way exhaust valve, to allow gas to be discharged but prevent liquid and bacterial reflux. Application of antibacterial coating: Spraying silver ion antibacterial agent on the surface of the bag can inhibit the proliferation of common pathogens such as Escherichia coli and Staphylococcus aureus, and prolong the preservation time of the body. The handleless zipper body bag has redefined the standards for body transportation tools through innovative sealing technology, simplified operating procedures, application of environmentally friendly materials, and cost optimization. Its design not only reflects respect for the deceased, but also provides efficient, safe, and economical solutions for frontline personnel in public health events, natural disaster relief, and other scenarios.