During the road transportation of hazardous materials (hazmat), container was usually used to protect the inner package from accidents. The conventional container is a sandwich-framed construction. When it was subjected to car fire, the combustible materials such as poly-foam interlayer would burn up in few minutes. Once the hazmat leaked out, it could result in the great loss of the public and environment. In this paper, a double-frame container mechanism was firstly proposed for loss prevention. In order to investigate the heat conduction pattern and the effect of interlayer thickness, the two-dimensional (2D) Finite Element (FE) model was developed. Based on the numerical results, the interlayer thickness was defined as 155 mm considering the ignorance of sealing. Furthermore, two small-scale containers whose interlayer were ceramic fiber and phenolic foam separately were manufactured. Pool fire experiments were carried out to evaluate the fire resistance of the mechanism and compare the insulation of the interlayer. Results show that the construction of the container remained complete after about 30-min fire exposure. The maximum temperature inside was below 100 °C during the burning process. When the fire burnt down, the temperature inside increased to 110 °C and then declined gradually during the 1000-min cooling process. Additionally, although the thermal insulation of the container with phenolic foam is relatively better, the ceramic fiber is much more suitable for the interlayer considering the sealing of the container and the stability in heat. In summary, the double-frame container could protect the product inside from car fire. It could be beneficial for the fire-resistant design of much bigger containers, which might be widely used for loss prevention in hazmat transport.

在危险物质（危险品）的公路运输过程中，通常使用容器来保护内包装免受意外伤害。传统的容器是三明治框架结构。当汽车起火时，可燃材料（例如泡沫塑料夹层）会在几分钟内燃烧。一旦危险品泄漏出去，可能导致公众和环境的巨大损失。在本文中，首先提出了一种用于防止损失的双框架容器机构。为了研究热传导模式和中间层厚度的影响，建立了二维（2D）有限元（FE）模型。基于数值结果，考虑到密封的无知，将层间厚度定义为155mm。此外，制造了两个小容器，它们的夹层分别是陶瓷纤维和酚醛泡沫。进行池火实验以评估该机构的耐火性并比较中间层的绝缘性。结果表明，在暴露约30分钟后，容器的构造仍保持完整。在燃烧过程中，内部最高温度低于100°C。当大火燃烧时，内部温度升至110°C，然后在1000分钟的冷却过程中逐渐下降。另外，尽管用酚醛泡沫塑料对容器的绝热效果较好，但考虑到容器的密封性和热稳定性，陶瓷纤维更适合用作中间层。综上所述，双框容器可以保护产品内部免受汽车着火。这对于更大的容器的防火设计可能是有益的，该容器可能被广泛用于防止危险品运输中的损失。