Lead casing for pencil, and pencil thereof for writing, drawing, marking, plotting, and coloring
AssigneeSociete BIC
InventorJulien Gouerec
Life of this patent
Estimating the term…
Abstract
There is a lead casing for pencil for writing, drawing, marking, plotting, and/or coloring, made of a composition having, by weight relative to the total weight of the lead casing for pencil: a) from 50 to 95% of a mixture of polylactic acid and polybutylene adipate terephthalate in a weight ratio polylactic acid/polybutylene adipate terephthalate ranging from 60/40 to 90/10, and b) from 5 to 40% of vegetable fillers chosen in the group consisting of wood fibers. There is also a pencil including the lead casing for the pencil of the disclosure for writing, drawing, marking, plotting, and/or coloring, as well as a method for manufacturing such a pencil.
Claims5
A pencil comprising a lead casing surrounding a lead, wherein the lead casing consists of, by weight relative to the total weight of the lead casing:
- a) from 70 to 90% of a mixture of polylactic acid and polybutylene adipate terephthalate in a weight ratio polylactic acid/polybutylene adipate terephthalate ranging from 60/40 to 90/10, and
- b) from 10 to 20% of vegetable fillers selected from the group consisting of wood fibers.
A pencil comprising a lead casing surrounding a lead, wherein the lead casing consists of, by weight relative to the total weight of the lead casing:
- a. from 70 to 90% of a mixture of polylactic acid and polybutylene adipate terephthalate in a weight ratio polylactic acid/polybutylene adipate terephthalate ranging from 60/40 to 90/10,
- b. from 10 to 20% of vegetable fillers selected from the group consisting of wood fibers, and
- c. a polylactic acid grafted with maleic anhydride (PLA-MA).
Dependencies are inferred from the claim text.