Back to results
US 12,172,458 B2Granted
Body for a writing, tracing, drawing or coloring pencil
AssigneeSociete BIC
InventorJulien Gouerec
Life of this patent
Estimating the term…
Abstract
A body for a writing, tracing, drawing or coloring pencil has a composition that includes, by weight, with respect to the total weight of the body between 50% and 95% of a mixture of polylactic acid and of polybutylene succinate in a polylactic acid/polybutylene succinate ratio by weight of between 90/10 and 60/40 and between 5% and 50% of filler that can have shellfish shells and/or calcium carbonate. A writing, tracing, drawing or coloring pencil has such a body.
Claims19
A pencil body for a writing, tracing, drawing or coloring pencil, the body having a composition comprising, by weight, with respect to a total weight of the body:
- between 50% and 95% of a mixture of polylactic acid and polybutylene succinate in a ratio by weight of polylactic acid/polybutylene succinate that is between 90/10 and 60/40;
- and
- between 5% and 50% of a filler that is shellfish shells and/or calcium carbonate,
- wherein the filler does not comprise SiO2.
- wherein the polylactic acid and the polybutylene succinate are the sole thermoplastic polymers of the body.
2 more elements
Dependencies are inferred from the claim text.