2 sentences for 膠 (jiāo — rubber)

1. 他收藏了许多珍贵的黑胶唱片。

   tā shōu​cáng le xǔ​duō zhēn​guì de hēi jiāo chàng​piàn.

   He has a collection of many precious vinyl records.

   Source: Dong Chinese Dictionary

2. 这种球是用高弹性的胶制成的，回弹很快。

   zhè zhǒng qiú shì yòng gāo tán​xìng de jiāo zhì​chéng de, huí​tán hěn kuài.

   This ball is made of highly elastic rubber and bounces back quickly.

   Source: Dong Chinese Dictionary