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2. Rubber pad forming - Wikipedia

   en.wikipedia.org/wiki/Rubber_pad_forming

   Rubber pad forming process, 1: bottom of the press. 2: lower die. 3: sheet metal. 4: rubber pad. 5: top of the press. Rubber pad forming (RPF) is a metalworking process where sheet metal is pressed between a die and a rubber block, made of polyurethane. Under pressure, the rubber and sheet metal are driven into the die and conform to its shape ...

3. Polyisoprene - Wikipedia

   en.wikipedia.org/wiki/Polyisoprene

   In practice polyisoprene is commonly used to refer to synthetic cis-1,4-polyisoprene, made by the industrial polymerisation of isoprene. Natural forms of polyisoprene are also used in substantial quantities, the most important being " natural rubber " (mostly cis -1,4-polyisoprene), which is derived from the sap of trees.

4. Tire manufacturing - Wikipedia

   en.wikipedia.org/wiki/Tire_manufacturing

   With over 1 billion tires manufactured worldwide annually, the tire industry is a major consumer of natural rubber. [1] Tire factories start with bulk raw materials such as synthetic rubber (60% -70% of total rubber in the tire industry [2] [3]), carbon black, and chemicals and produce numerous specialized components that are assembled and cured.

5. Calender - Wikipedia

   en.wikipedia.org/wiki/Calender

   A calender is a series of hard pressure rollers used to finish or smooth a sheet of material such as paper, textiles, rubber, or plastics. Calender rolls are also used to form some types of plastic films and to apply coatings. [1] Some calender rolls are heated or cooled as needed. [2] Calenders are sometimes misspelled calendars.

6. Natural rubber - Wikipedia

   en.wikipedia.org/wiki/Natural_rubber

   Rubber is the polymer cis-1,4-polyisoprene – with a molecular weight of 100,000 to 1,000,000 daltons. Typically, a small percentage (up to 5% of dry mass) of other materials, such as proteins, fatty acids, resins, and inorganic materials (salts) are found in natural rubber.

7. Crepe rubber - Wikipedia

   en.wikipedia.org/wiki/Crepe_rubber

   Re-milled crepe is made from "wet slab coagulum" (cured latex, still wet from the coagulation tanks), latex sheets (unsmoked) and cup lump. Smoked blanket crepe is made from thick sheets of latex that have been processed in a smoker. Flat bark crepe is made from scraps and other poor quality raw product.