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What kind of material is the eraser made of
- Nov 07, 2018 -

Rubber raw materials are rubber or plastic, sulfur, vegetable oil, gravel. Rubber (Rubber): A highly elastic polymer material with reversible deformation. Elastic at room temperature, under very small external forces can produce a large deformation, remove external force can be restored to the original condition, and do not conduct electricity. Rubber belongs to a completely unshaped polymer, its vitrification transition temperature (Tg) is low, the molecular weight is often very large, greater than hundreds of thousands of.

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