Without them, glass windshields will be a lot weaker.

沒有它們，玻璃擋風玻璃就會變得脆弱不堪。

They've actually been around for a few decades after car manufacturers started to use adhesives to hold windows in place.

實際上，在汽車製造商開始使用黏合劑將車窗固定到位之後，它們已經存在了幾十年。

But have you ever wondered what they're actually for?

但你有沒有想過它們的真正用途是什麼？

The dots and black band running around the edge of your windshield is called a frit.

擋風玻璃邊緣的點和黑帶稱為熔塊。

It is black painted enamel that is baked on both sides of the glass around the borders of the windshield and it has several purposes.

它是在擋風玻璃邊緣周圍的玻璃兩側烘烤的黑色琺瑯，它有多種用途。

The frit that's on the inner side of the windshield serves as a contact point between the glass and the car frame and help provide a stronger bond.

擋風玻璃內側的熔塊可作為玻璃和車架之間的接觸點，有助於提供更牢固的黏合。

The frit that's on the outside acts as a shield against UV radiation to protect the adhesive bond.

外面的玻璃料充當紫外線輻射的屏障，以保護黏合。

If this adhesive is made out of polyurethane, which most grass bond mega deive are, it can become weaker after continue exposure to direct sunlight.

如果這種黏合劑是由聚氨酯製成的（大多數草黏結巨型驅動器都是聚氨酯），那麼在連續暴露於陽光直射後，它會變得更弱。

Hybrid polymer based adhesives handle sunlight much better as they have more UV resistance.

基於混合聚合物的黏合劑能夠更好地應對陽光，因為它們具有更強的抗紫外線能力。

The half tone pattern in which the black dots are scattered, helps distribute the temperature evenly and helps prevent optical distortion or lensing that would potentially shatter the glass.

散佈黑點的半色調圖案有助於均勻分佈溫度，並有助於防止光學變形或透鏡效應，從而避免玻璃破碎。

The frit also provides a more polished appearance by concealing the adhesive bond.

玻璃料還透過隱藏黏合劑來提供更拋光的外觀。

Nowadays, cars often have a third visor frit which is placed behind the rearview mirror to block the sun between the two sun visors.

如今，汽車通常有第三個遮陽板玻璃料，放置在後視鏡後面，以阻擋兩個遮陽板之間的陽光。

If you want to know more about how a windshield is bonded and glass bonding adhesives, you can watch our video on the characteristics of bonding glass in the description below.

如果你ㄋ想了解更多關於擋風玻璃如何粘合以及玻璃粘合膠的信息，可以在下面的說明欄中觀看我們關於粘合玻璃特性的影片。