Erasable colored pencil lead
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 4, 2000
Grant Date -
N/A
app pub date -
Jun 26, 1998
filing date -
Jun 26, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a colored pencil lead composition comprising a colorant, one or more binder resins, a fibrillatable or fibrillated material, a non-fibrillatable particulate lubricant, and a filler. An example of a suitable binder resin is high density polyethylene, and an example of a fibrillated or fibrillatable material is fibrillatable polytetrafluoroethylene. An example of a non-fibrillatable particulate lubricant is micronized polytetrafluoroethylene. The colored pencil lead of the present invention produces marks on paper which are easily erased by ordinary pencil eraser. The present invention further provides a process for preparing the colored pencil lead of the present invention comprising compounding the colorant, the binder resin or resins, the fibrillatable or fibrillated material, the non-fibrillatable particulate lubricant, and the filler to obtain a blend and forming the pencil lead from the blend.
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