Without them, glass windshields will be a lot weaker.

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

それがなければ、ガラスのフロントガラスはもっと弱くなってしまう。

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

実際に数十年前から存在している

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

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.

自動車メーカーが接着剤で窓を固定するようになってからである。

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.

しかし、実際には何のためにあるのか考えたことはあるだろうか？

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

フロントガラスの縁に走る点と黒い帯はフリットと呼ばれる。

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.

ガラスの両面に黒く塗装したエナメルを焼き付けている、

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

ウィンドシールドの縁を囲むように、

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.

いくつかの目的がある。フロントガラスの内側にあるフリットが接点となる

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

ガラスと車のフレームをより強固に結合させる。

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

外側のフリット

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.

は紫外線を遮蔽し、接着剤を保護する。