1 / 4

Natural latex rubber comes from trees.

Natural latex rubber comes from trees. Discovered by columbus on his 2 nd trip to the Americas in Haiti (caw- uchu = “weeping wood”) Natives used it for basketball and to “rubberize” footwear. Given the name “rubber” by Joseph Priestly, 1770

emilie
Télécharger la présentation

Natural latex rubber comes from trees.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Natural latex rubber comes from trees. Discovered by columbus on his 2nd trip to the Americas in Haiti (caw-uchu = “weeping wood”) Natives used it for basketball and to “rubberize” footwear. Given the name “rubber” by Joseph Priestly, 1770 because it could rub off pencil marks. Queen Victoria’s Carriage Tires made of rubber 1846 Heveabrasiliensisis the most popular tree -- grows 50 ft high Transplanted by the English to Asia where it thrives. 42% of rubber is still produced naturally. http://www.cementex.com/index.asp?ID=3&PageAction=Custom http://en.wikipedia.org/wiki/Rubber http://www.immune.com/rubber/nr1.html

  2. What’s that smell? Ammonia is added into the collection cups to prevent coagulation.

  3. Woofers used to use natural rubber on cloth surrounds (I think). Now we use this urethane stuff. Someone restored these classic AR3a’s with a modern surround. As tragic as painting an old car with urethane paint.

More Related