Your contact person:

Mrs. Meike Huijssen +49 (0) 58 62 / 94 11 103 info@sem-hitzacker.de

Charles Goodyear He mixed rubber, sulfur, and oil to make waterproof soles for his children's shoes. While the mixture was in the oven, Goodyear fell asleep and was awakened only by an explosion. Because of the exothermic reaction, he found his mixture to be black and hard.

In doing so, he discovered a completely new material that is resistant to salt water, acids, and alkalis; is not electrically conductive; is unbreakable; and is easy to work with.

After some time spent on research and development, he founded his tire factory.

From the late 19th century through the mid-20th century, ebonite was used for countless applications related, including, among other things:

Light switches, electrical outlets, battery cases, bowling balls, chair and sofa backs, canes, batons, radio casings, wall paneling, chess pieces, piano keys….

With the discovery of the more affordable plastic, knowledge of ebonite fell into oblivion.

 

We have recognized the potential of this beautiful natural material We have rediscovered it and are dedicated to its development and dissemination.

Natural rubber is the main component of our high-quality ebonite. It is extracted from the rubber tree.

The tree's bark is cut in a spiral pattern to a depth of a few millimeters. This process does not harm the tree. The liquid rubber drips from the incisions into collection containers, is then washed in a complex process, rolled out into sheets, and dried.

We use only the The highest-quality natural rubber, Crepe No. 1.

Key Production Processes

Raw Material Extraction

Harvest
Drying the rubber sheets after the washing process
The highest-quality natural rubber (Crepe No. 1)

Hard rubber compound made from a secret recipe

Crepe No. 1
Ground sulfur
Flaxseed oil
Compound prepared for the vulcanization process

Vulcanization Process

Autoclaves
After the vulcanization process (24 hours)
The plates are hard and have a glossy black finish.

Dust Generation

Shredded
Ground
Dust Generation
Filtered 100 ÎĽm/120 ÎĽm/140 ÎĽm/160 ÎĽm

Preparation of the Black Ebonite Mixture

Crepe No. 1
Ebonite Dust
Ground sulfur
Black Ebonite Compound

Rod Production

The mixture is rolled out
Finished product
The mixture is extruded
The flexible rods are inserted into stainless steel tubes and vulcanized for 1 to 3 days, depending on their diameter.
Vulcanized rods with a Shore hardness of > 82 D Shore