Societe Bic

Conte

Bic Violex Single Member S.a.

Bic Violex S.a.

Julien Gouerec

Philippe Lefebvre

Frédéric Claptien

Nikolaos Chatzigrigoriou

Christelle Debrauwer

Alice Danel

Frédéric D Claptien

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.

Body for a writing, tracing, drawing or coloring pencil

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: 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.

Lead casing for pencil, and pencil thereof for writing, drawing, marking, plotting, and coloring

A handle for razor is made of polylactic acid (PLA) and another bioplastic polymer such as polybutylene adipate terephtalate (PBAT), bio-polyethylene (bio-PE), and polybutylene succinate (PBS), combined with mineral fillers selected from the group of calcium carbonate and shells of shellfish, such as oyster shells or scallop shells.

Handle for razor made of bioplastic polymers and vegetable fillers

Handle for razor made of bioplastic polymers and mineral fillers

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: 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.

A body for a writing, tracing, drawing or coloring pencil has a composition that has, 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 polylactic acid/polybutylene succinate ratio by weight of between 90/10 and 60/40 and between 5% and 50% of filler that includes an organic filler, such as wood fibers. A writing, tracing, drawing or coloring pencil includes such a body.

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 bio-polyethylene in a weight ratio polylactic acid/bio-polyethylene 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 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.

There is a lead casing for pencil for writing, drawing, marking, plotting, and/or coloring. The casing is made of a composition having, by weight relative to the total weight of the lead casing for pencil: There is also a pencil including the lead casing of the disclosure for writing, drawing, marking, plotting, and/or coloring, as well as a method for manufacturing such a pencil.

A pencil lead and a pencil containing the pencil lead wherein the pencil lead is polymer-based, extrudable, non-expanded, non-calcined and comprises graphite, of which 25% to 100% by weight or 50% to 100% by weight of the graphite, in relation to the total weight of the graphite, is expanded graphite.

Pencil lead

A writing or coloring pencil has three layers obtained by co-extrusion, including an unexpanded polymer-based lead, an unexpanded intermediate protective layer surrounding the lead and comprising an ethylene (C1-C4 alkyl) acrylate copolymer, alone or as a blend with a styrene polymer, and an expanded styrene polymer-based synthetic wood material surrounding the intermediate protective layer.

Writing or coloring pencil

A wax-based coloring crayon for a porous surface and for a non-porous surface includes at least one wax, an ethoxylated fatty alcohol, stearin, a filler, at least one pigment, and optionally an additive.

Wax-based coloring crayon with a watercolor effect

The present invention thus relates to a writing or color pencil comprising the following 3 layers obtained by coextrusion a polyolefin-based non-expanded lead, a non-expanded protective intermediate layer surrounding the lead and comprising a mixture of polystyrene and EVA, and an expanded synthetic wood material based on a styrene polymer surrounding the protective intermediate layer, the protective intermediate layer thickness/lead radius ratio being between 0.05 and 0.17, advantageously between 0.07 and 0.15.

Pencil for writing or colouring

The present invention concerns an extrudable, unexpanded paper pencil lead, comprising, by weight relative to the total weight of the lead, between 40 and 60%, and advantageously between 44 and 50%, of graphite; between 15 and 40%, and advantageously between 20 and 35%, of a polyolefin; between 5 and 15%, and advantageously between 6 and 10%, of a colorless mineral filler; between 5 and 20%, and advantageously between 5 and 15%, of carbon black coated with or mixed with a polyolefin wax or a polyolefin; between 0 and 16%, and advantageously between 5 and 15%, of an additive. It further concerns the paper pencil comprising a lead according to the invention.

Paper pencil lead

The present invention concerns an extrudable, unexpanded color pencil lead, comprising, by weight relative to the total weight of the lead: between 25 and 45%, and advantageously between 30 and 40%, of a polyolefin; between 25 and 50%, and advantageously between 30 and 40%, of a colorless mineral filler; between 4 and 20%, and advantageously between 5 and 15%, of a pigment coated with or mixed with a polyolefin wax; between 0 and 10%, and advantageously between 2 and 10%, of an additive, and between 10 and 30%, and advantageously between 15 and 25%, of stearate chosen from magnesium stearate, calcium stearate and the mixture of same. It further concerns the color pencil comprising a lead according to the invention.

Growing community of inventors

Boulogne-sur-Mer, France

Julien Gouerec