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:

斷橋鋁尼龍隔熱條呈黑啞光色，通常條體上每間隔60~80cm就標注有商標及產品規格等內容的激光噴碼，且整體光滑平整，無縮孔，無疏松，無劃痕及模具擠壓痕跡，對光細看可見礦物質光澤，隔熱條頭部端面無分模線痕。

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型規格25cm試樣進行人力掰斷實驗， 斷橋鋁 尼龍隔熱條彎曲時能感覺到良好的韌性和強度，彎折至兩端并攏也不會折斷，即使斷裂呈緩慢裂斷現象。

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.

斷橋鋁尼龍隔熱條不易點燃，燃燒時呈淡黃色火焰，PVC隔熱條易燃，燃燒時呈藍色火焰，并釋放大量刺鼻的黑色煙霧。

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.

斷橋鋁尼龍隔熱條高溫燃燒后可見均勻黑色纖維物沉積；其它進口或國產尼龍隔熱條高溫燃燒后要么有不均勻纖維物沉積，要么完全燃燒，基本無纖維物沉積；PVC隔熱條高溫下燃燒后無任何沉積。

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.

用游標卡尺對隔熱條的外形精度進行尺寸精度檢測可以發現：斷橋鋁尼龍隔熱條無論不同批次或同一支隔熱條的不同部位尺寸偏差均小于0.1mm,且平行度標準。

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.