The reason why the bridge cutting aluminum door and window processing equipment is called bridge cutting aluminum is because it has insulation strips to block and disconnect. If there is no insulation strip, aluminum doors and windows can only be called aluminum alloy doors and windows instead of bridge cutting aluminum doors and windows:

断桥铝尼龙隔热条呈黑哑光色，通常条体上每间隔60~80cm就标注有商标及产品规格等内容的激光喷码，且整体光滑平整，无缩孔，无疏松，无划痕及模具挤压痕迹，对光细看可见矿物质光泽，隔热条头部端面无分模线痕。

The broken bridge aluminum nylon insulation strip is in a black matte color, usually labeled with laser spray codes such as trademark and product specifications every 60-80cm on the strip body. It is overall smooth and flat, without shrinkage holes, looseness, scratches, and mold extrusion marks. Upon closer inspection, mineral luster can be seen, and there are no parting line marks on the head and end face of the insulation strip.

取I型规格25cm试样进行人力掰断实验， 断桥铝 尼龙隔热条弯曲时能感觉到良好的韧性和强度，弯折两端并拢也不会折断，即使断裂呈缓慢裂断现象。

Taking a 25cm sample of Type I specification for manual breaking experiment, the broken bridge aluminum nylon insulation strip can feel good toughness and strength when bent, and will not break even when bent to both ends, even if the fracture shows a slow fracture phenomenon.

断桥铝尼龙隔热条不易点燃，燃烧时呈淡黄色火焰，PVC隔热条易燃，燃烧时呈蓝色火焰，并释放大量刺鼻的黑色烟雾。

The broken bridge aluminum nylon insulation strip is not easy to ignite, and when burned, it presents a light yellow flame. The PVC insulation strip is flammable, and when burned, it presents a blue flame and releases a large amount of pungent black smoke.

断桥铝尼龙隔热条高温燃烧后可见均匀黑色纤维物沉积；其它进口或国产尼龙隔热条高温燃烧后要么有不均匀纤维物沉积，要么完全燃烧，基本无纤维物沉积；PVC隔热条高温下燃烧后无任何沉积。

After high-temperature combustion, uniform black fiber deposition can be seen on the broken bridge aluminum nylon insulation strip; Other imported or domestic nylon insulation strips either have uneven fiber deposition or complete combustion after high-temperature combustion, with almost no fiber deposition; There is no deposition after combustion of PVC insulation strips at high temperatures.

用游标卡尺对隔热条的外形精度进行尺寸精度检测可以发现：断桥铝尼龙隔热条无论不同批次或同一支隔热条的不同部位尺寸偏差均小于0.1mm,且平行度标准。

By using a vernier caliper to test the dimensional accuracy of the insulation strip, it can be found that the size deviation of the broken bridge aluminum nylon insulation strip is less than 0.1mm regardless of different batches or different parts of the same insulation strip, and the parallelism is standard.