WO2016097553A1 - Mine de crayon a papier - Google Patents
Mine de crayon a papier Download PDFInfo
- Publication number
- WO2016097553A1 WO2016097553A1 PCT/FR2015/053467 FR2015053467W WO2016097553A1 WO 2016097553 A1 WO2016097553 A1 WO 2016097553A1 FR 2015053467 W FR2015053467 W FR 2015053467W WO 2016097553 A1 WO2016097553 A1 WO 2016097553A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- advantageously
- polyolefin
- pencil
- carbon black
- pencil lead
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
- B43K19/02—Pencils with graphite; Coloured pencils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
- B43K19/16—Making non-propelling pencils
- B43K19/18—Making pencil writing-cores
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D13/00—Pencil-leads; Crayon compositions; Chalk compositions
Definitions
- the present invention relates to polymer-based mines for extrudable pencils and having improved scrubbing facility.
- this mine must include palm oil in order to improve its extrusion manufacturing process. Moreover, this oil makes it possible to improve the optical density of the mark left by the pencil on the paper. However, this has an adverse effect on the effectiveness of the scrub of this brand: because of the use of this fat, carbon black in the mine will penetrate deeply into the paper and it will be difficult to erase it. In addition, there is a risk of weakening the mine since palm oil will reduce its mechanical properties.
- the pencil lead has sufficient strength and flexural strength to withstand the conditions of use and that it can be cut without breaking. It is therefore difficult to obtain a mine with all these qualities: high scrubbing efficiency, sufficient darkness and mechanical properties necessary for its use.
- the inventors have surprisingly found that it is possible to obtain a pencil polymer-based mine having a high scrubbing facility while having sufficient darkness and sufficient flexural strength to avoid breaking. when in use or when the pencil is cut using judiciously chosen proportions of graphite, carbon black coated or blended with polyolefin wax or polyolefin, colorless inorganic filler and polyolefin .
- Patent Application EP2660072 discloses a colored pencil having high elasticity and plasticity and its manufacturing method.
- This pencil comprises, according to example 18, graphite, polypropylene, talc and carbon black.
- it is not a pencil lead since it is not intended to be used with or inserted into a sheath.
- the carbon black used has not been premixed with a polyolefin wax or a polyolefin before it has been added to the composition, which may cause gumming problems.
- the composition does not include polyolefin wax.
- the present invention therefore relates to an extrudable, in particular extruded, unexpanded pencil lead comprising, advantageously being constituted by, by weight relative to the total weight of the mine:
- the mine according to the present invention therefore belongs to the category of polymer-based graphite mines, here based on polyolefin.
- the mine according to the present invention is extrudable, i.e. it can be obtained by extrusion.
- it is extruded.
- the mine according to the present invention is unexpanded.
- no blowing agent is used during its manufacturing process.
- the polyolefin used is not foamed.
- the mine according to the present invention is a pencil lead, that is to say intended to be used in pencils, in particular in pencils coated with wood or synthetic wood material, possibly comprising an intermediate protective layer, in particular as described in the patent application WO01 / 43987.
- the pencil lead according to the present invention thus comprises between 40 and 60% by weight of graphite relative to the total weight of the mine, advantageously between 44 and 50% by weight of graphite relative to the total weight of the mine, more preferably between 44 and 48% by weight of graphite relative to the total weight of the mine, more particularly between 44.5% and 47% by weight of graphite relative to the total weight of the mine.
- the graphite has a volume particle size D 50 measured by laser particle size, for example by a Sympatec Helios brand laser diffraction (particle size diffraction), between 15 and 20 ⁇ (volumetric measurement of the particle size distribution - Fraunhofer method ISO 13320).
- Graphite gives the mine some of its good mechanical properties, in particular resistance to bending, depending on the size and shape of the graphite particles used and the softness in the writing while providing a part blackness.
- the pencil lead according to the present invention further comprises between 15 and 40% by weight of a polyolefin relative to the total weight of the mine, advantageously between 20 and 35% by weight of a polyolefin relative to the total weight. of the mine, more preferably between 23 and 31% by weight of a polyolefin relative to the total weight of the mine, more advantageously between 24 and 30% by weight of a polyolefin relative to the total weight of the mine.
- Polyolefin is the main polymer of the mine. Even more advantageously the mine does not include other polymers.
- the polyolefin may be polyethylene or polypropylene, in particular polypropylene, more particularly polypropylene homopolymer.
- the polyolefin makes it possible to make the mine extrudable and to give it good mechanical properties that are resistant to bending.
- the pencil lead according to the present invention further comprises between 5 and 15% by weight of a colorless inorganic filler with respect to the total weight of the mine, advantageously between 6 and 10% by weight of a colorless inorganic filler by relative to the total weight of the mine.
- the colorless inorganic filler is chosen from clay, talc, boron nitride, silica, calcium carbonate, mica, steatite powder and mixtures thereof, advantageously it is chosen from clay, silica and talc.
- it is a colorless, lamellar inorganic filler, more particularly chosen from clay, boron nitride, mica and / or talc, for example a clay chosen in particular from montmorillonite, bentonite and kaolin, more particularly it is kaolin or bentonite, in particular kaolin with a mass particle size D50 measured by sedimentation, for example using a SEDIGRAPH® device from Micromeritics, between 2 and 5 ⁇ m, for example marketed by the SOKA company under the name BLANKAUTE 77. It may also be a bentonite having a particle size D50 in volume measured by laser particle size of between 10 and 15 ⁇ m, for example marketed by the company COMERCIAL QUIMICA MASSO under the name ⁇ BLANCA.
- clay chosen in particular from montmorillonite, bentonite and kaolin
- kaolin or bentonite in particular kaolin with a mass particle size D50 measured by sedimentation, for example using
- Silica and talc are intended to provide mechanical properties to the mine, such as flexural strength and / or fracture toughness.
- the lamellar mineral fillers are intended to provide softness during writing and maintain a structure that disintegrates on paper in the image of graphite sheets.
- the pencil lead according to the present invention further comprises between 5 and 20% by weight of carbon black coated with or mixed with a polyolefin wax or a polyolefin with respect to the total weight of the mine, advantageously between 5 and 15% by weight.
- % by weight of carbon black coated with or mixed with a polyolefin wax or a polyolefin relative to the total weight of the mine more preferably between 6 and 13 % by weight of carbon black coated with or mixed with a polyolefin wax or a polyolefin relative to the total weight of the mine, still more advantageously between 7 and 10% by weight of carbon black coated with or mixed with a wax of polyolefin or polyolefin relative to the total weight of the mine, in particular between 8 and 9% by weight of carbon black coated with or mixed with a polyolefin wax or a polyolefin relative to the total weight of the mine.
- the carbon black used can therefore be coated with or mixed with a polyolefin wax or a polyolefin, in particular coated with or mixed with a polyolefin wax (for example in the form of a masterbatch, a pigment preparation or a a dispersion of carbon black in a wax or in the polyolefin, in particular in a wax).
- a polyolefin wax for example in the form of a masterbatch, a pigment preparation or a a dispersion of carbon black in a wax or in the polyolefin, in particular in a wax.
- Carbon black can bring blackness to the mine while polyolefin wax or polyolefin improves the ease of exfoliation since it avoids the carbon black powder to penetrate the support on which is made the mark with the pencil comprising the mine according to the present invention.
- the mixture or the coating with the polyolefin or the polyolefin wax therefore takes place before the addition to the composition of the mine according to the invention.
- Polyolefin wax is more advantageous than a polyolefin because the smoothness on the paper is better with a carbon black mixed with or coated with a polyolefin wax rather than a polyolefin.
- the dispersion in the mixture and thus the homogeneity and the blackness are better with the use of a coating or a mixture of polyolefin wax.
- the polyolefin is polypropylene or polyethylene or their mixture, advantageously it is polyethylene, for example low density polyethylene.
- the carbon black content of the carbon black coated with or mixed with a polyolefin wax or a polyolefin is between 25 and 65% by weight, advantageously between 30 and 60% by weight, relative to total weight of the carbon black coated with or mixed with a polyolefin wax or a polyolefin.
- the carbon black used in the mine according to the present invention is the carbon black coated with a polyolefin wax.
- the carbon black content of the carbon black coated with a polyolefin wax is between 40 and 65% by weight relative to the total weight of the carbon black coated with a polyolefin wax.
- the polyolefin wax is a polypropylene or polyethylene wax or a mixture thereof, advantageously it is a polyethylene wax, for example of low density polyethylene.
- the carbon black coated with a polyolefin wax is commercially available from SunChemical under the name Sunfast® PE Flush Black L47-9000.
- the pencil lead according to the present invention may comprise an additive, in a content of between 0 and 16% by weight relative to the total weight of the mine, advantageously between 5 and 15% by weight relative to the total weight of the mine, more preferably in a content of between 6 and 14.5% by weight relative to the total weight of the mine.
- This additive may be chosen from the additives well known to those skilled in the art in the field of paper pencil leads, in particular among slipping agents, processing agents, coupling agents, dispersing agents and lubricants. and mixtures thereof, advantageously among stearates such as calcium stearate, stearate of magnesium, sodium stearate, zinc stearate and mixtures thereof, an amide, in particular a stearamide such as ethylene bis stearamide, waxes, fatty acids, glycerol and its derivatives such as glycerol behenate, glycerol dibehenate, glycerol stearate and / or polyglyceryl diisostearate, polypropylene grafted siloxane, maleic anhydride grafted polypropylene and mixtures thereof, more preferably calcium stearate, ethylene bis stearamide and mixtures thereof.
- stearates such as calcium stearate, stearate of magnesium, sodium stearate
- the mine according to the present invention comprises calcium stearate, in particular in a content of between 5 and 10% by weight, advantageously between 6 and 9% by weight, relative to the total weight of the mine.
- Calcium stearate helps bring softness and slippery to the paper.
- the mine according to the present invention comprises an amide, in particular a stearamide such as ethylene bis stearamide, advantageously in a content of between 0.5 and 3% by weight, advantageously between 1 and 5% by weight. and 2.5% by weight, based on the total weight of the mine.
- a stearamide such as ethylene bis stearamide
- the amide helps to disperse the fillers in the composition and also has a slight positive effect on the slipperiness.
- the mine according to the present invention may also comprise glycerol and its derivatives such as glycerol behenate, glycerol dibehenate, glycerol stearate and / or polyglycerol diisostearate, advantageously in a content of between 0 and 4% by weight. more preferably between 1 and 3% by weight, based on the total weight of the mine. Glycerol and its derivatives have a lubricating effect.
- the mine according to the present invention may also comprise siloxane grafted onto polypropylene, advantageously in a content of between 0 and 7% by weight, more advantageously between 1 and 6%. by weight, based on the total weight of the mine.
- the siloxane grafted on polypropylene decreases the coefficient of friction, improves the resistance to wear / abrasion and helps the dispersion of the loads.
- the mine according to the present invention may also comprise a coupling agent, in particular a polypropylene base coupling agent, such as, for example, maleic anhydride grafted polypropylene, advantageously in a content of between 0 and 4% by weight, more advantageously between 1 and 4% by weight. and 3% by weight, based on the total weight of the mine.
- a coupling agent in particular a polypropylene base coupling agent, such as, for example, maleic anhydride grafted polypropylene, advantageously in a content of between 0 and 4% by weight, more advantageously between 1 and 4% by weight. and 3% by weight, based on the total weight of the mine.
- the pencil lead according to the present invention does not include a plasticizer.
- the pencil lead according to the present invention does not include palm oil.
- the mine has a diameter of between 2 and 3.6 mm, advantageously it is a mine having a diameter of between 2 and 2.3 mm.
- the mine according to the present invention can be manufactured by methods well known to those skilled in the art.
- the mine according to the present invention therefore has sufficient darkness while having good mechanical properties, in particular resistance to bending and / or impact resistance, and having improved scrubbing facility.
- the present invention also relates to a pencil comprising a mine according to the present invention, in particular a pencil coated with wood or synthetic wood material, optionally comprising an intermediate protective layer, for example as described in the application for WO01 / 43987.
- the pencil is obtained by coextrusion of the mine and the wood synthetic material and optionally the intermediate protective layer.
- the wood synthetic material is based on styrenic polymer and the intermediate protective layer also acts as an adhesion layer and may advantageously comprise a mixture of EVA and polystyrene.
- the synthetic wood material is expanded, to have a density equivalent to natural wood.
- the writing pencil according to the present invention may have a hexagonal, round or triangular section, advantageously round or hexagonal.
- it may include a means for erasing, such as an eraser, at the uncut end of the pencil.
- a means for erasing such as an eraser
- composition (% by weight) / example No. 6 No. 7 No. 8
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2015366058A AU2015366058B2 (en) | 2014-12-17 | 2015-12-14 | Paper pencil lead |
BR112017012737-7A BR112017012737B1 (pt) | 2014-12-17 | 2015-12-14 | Grafite de lápis de papel e lápis para papel |
RU2017123020A RU2700063C2 (ru) | 2014-12-17 | 2015-12-14 | Грифель карандаша для бумаги |
CN201580073057.7A CN107406706B (zh) | 2014-12-17 | 2015-12-14 | 纸用铅笔的笔芯 |
PL15823640T PL3234044T3 (pl) | 2014-12-17 | 2015-12-14 | Wkład do ołówka |
CA2970842A CA2970842A1 (fr) | 2014-12-17 | 2015-12-14 | Mine de crayon a papier |
MA40649A MA40649B1 (fr) | 2014-12-17 | 2015-12-14 | Mine de crayon a papier |
ES15823640T ES2835826T3 (es) | 2014-12-17 | 2015-12-14 | Mina de lápiz para papel |
TN2017000251A TN2017000251A1 (fr) | 2014-12-17 | 2015-12-14 | Mine de crayon a papier |
EP15823640.6A EP3234044B1 (fr) | 2014-12-17 | 2015-12-14 | Mine de crayon a papier |
US15/536,999 US10308063B2 (en) | 2014-12-17 | 2015-12-14 | Paper pencil lead |
MX2017007870A MX369785B (es) | 2014-12-17 | 2015-12-14 | Mina de lapiz para papel. |
ZA2017/04673A ZA201704673B (en) | 2014-12-17 | 2017-07-11 | Paper pencil lead |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1462662A FR3030364B1 (fr) | 2014-12-17 | 2014-12-17 | Mine de crayon a papier |
FR1462662 | 2014-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016097553A1 true WO2016097553A1 (fr) | 2016-06-23 |
Family
ID=52469218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2015/053467 WO2016097553A1 (fr) | 2014-12-17 | 2015-12-14 | Mine de crayon a papier |
Country Status (16)
Country | Link |
---|---|
US (1) | US10308063B2 (fr) |
EP (1) | EP3234044B1 (fr) |
CN (1) | CN107406706B (fr) |
AR (1) | AR103148A1 (fr) |
AU (1) | AU2015366058B2 (fr) |
BR (1) | BR112017012737B1 (fr) |
CA (1) | CA2970842A1 (fr) |
ES (1) | ES2835826T3 (fr) |
FR (1) | FR3030364B1 (fr) |
MA (1) | MA40649B1 (fr) |
MX (1) | MX369785B (fr) |
PL (1) | PL3234044T3 (fr) |
RU (1) | RU2700063C2 (fr) |
TN (1) | TN2017000251A1 (fr) |
WO (1) | WO2016097553A1 (fr) |
ZA (1) | ZA201704673B (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3065006A1 (fr) * | 2017-04-10 | 2018-10-12 | Societe Bic | Mine de crayon a papier |
WO2020127320A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127209A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127341A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127203A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
US20210206989A1 (en) * | 2020-01-06 | 2021-07-08 | SOCIéTé BIC | Lead for pencil for writing, drawing, marking, plotting and/or coloring |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109265073A (zh) * | 2018-09-26 | 2019-01-25 | 蚌埠神龙笔业有限公司 | 一种高强度铅笔芯及其制备方法 |
CN109096828A (zh) * | 2018-09-29 | 2018-12-28 | 蚌埠神龙笔业有限公司 | 一种字迹清晰、书面洁净的铅笔芯及铅笔 |
CN109385147B (zh) * | 2018-11-07 | 2021-09-03 | 哈尔滨隆之道科技有限公司 | 亚光铅笔芯及其制备方法 |
CN111469582A (zh) * | 2020-04-17 | 2020-07-31 | 南昌大学 | 一种隔离按键的方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4209332A (en) * | 1978-08-24 | 1980-06-24 | Sakura Color Products Corp. | Method for manufacturing pencil leads |
WO2001043987A1 (fr) | 1999-12-13 | 2001-06-21 | Conte | Procede de fabrication par tri-extrusion d'un crayon a ecrire ou a colorier et crayon a ecrire ou a colorier comportant une couche intermediaire de protection |
DE102004021048A1 (de) * | 2004-04-29 | 2005-11-24 | Poloplast Gmbh & Co.Kg | Stift zum Schreiben, Zeichnen, Malen oder Ähnlichem |
US20110118383A1 (en) | 2008-07-15 | 2011-05-19 | J.S. Staedtler Gmbh & Co. Kg | Pencil lead for writing, drawing and/or painting devices |
EP2660072A1 (fr) | 2010-12-30 | 2013-11-06 | Ying Liu | Stylo colorisé à élasticité et plasticité élevées et procédé de fabrication associé |
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US2682476A (en) * | 1950-05-11 | 1954-06-29 | Staedtler J S | Mixture for manufacture of pencil leads |
US3360489A (en) | 1963-03-11 | 1967-12-26 | Hassenfeld Bros Inc | Writing elements comprising colloidal thermoplastic resin and metallic soap |
GB1171634A (en) * | 1965-11-10 | 1969-11-26 | Dainihon Bungu Kabushiki Kaish | A method of preparing pencil leads |
EP1093495B1 (fr) * | 1998-06-26 | 2004-03-17 | Binney & Smith Inc. | Mine de Crayon, colorée et effaçable |
EP1146098A1 (fr) * | 2000-04-14 | 2001-10-17 | Sicpa Holding S.A. | Composition solide de marquage pour un instrument d'écriture, un instrument d'écriture, couche de marquage optiquement variable et utilisation de plusieurs pigments variables optiquement |
JP2006076040A (ja) | 2004-09-08 | 2006-03-23 | Hiromi Kawada | 多軸多層押出成形法による鉛筆用、色鉛筆用及びシャープペンシル用芯の製造方法 |
DE102005004175B4 (de) | 2005-01-26 | 2013-11-28 | J. S. Staedtler Gmbh & Co. Kg | Mine für Schreib-, Zeichen- oder Malgeräte |
DE502007003781D1 (de) | 2007-11-02 | 2010-06-24 | Faber Castell Ag | Mine |
DE102008034015B4 (de) | 2008-07-15 | 2011-08-25 | J. S. Staedtler GmbH & Co. KG, 90427 | Schreib-, Zeichen-, Mal- oder Kosmetikstift |
WO2010123070A1 (fr) | 2009-04-24 | 2010-10-28 | 三菱鉛筆株式会社 | Mine de crayon et son procédé de fabrication |
JP2012088871A (ja) | 2010-10-19 | 2012-05-10 | Hitachi Solutions Ltd | 公共交通機関内での広告配信システム |
ES2578732T3 (es) | 2011-03-17 | 2016-07-29 | Ems-Patent Ag | Cuerpo de manguito |
BRPI1104155B1 (pt) | 2011-08-15 | 2021-01-19 | Ebras Comércio De Lápis Ltda | formulação para a obtenção da matéria prima para a produção de um artigo para escrita, processo de fabricação de um artigo para escrita e artigo para escrita |
FR2988643B1 (fr) | 2012-03-28 | 2014-03-07 | Maped | Crayon expanse et son procede de fabrication |
DE102013001495B4 (de) | 2013-01-23 | 2023-11-02 | Staedtler Mars Gmbh & Co. Kg | Schreib-, Zeichen-, Mal- und/oder Kosmetikstift, umfassend eine Komponente zur Aufnahme von mindestens einem Auftragsmedium, sowie Verfahren zu deren Herstellung |
-
2014
- 2014-12-17 FR FR1462662A patent/FR3030364B1/fr not_active Expired - Fee Related
-
2015
- 2015-12-14 WO PCT/FR2015/053467 patent/WO2016097553A1/fr active Application Filing
- 2015-12-14 PL PL15823640T patent/PL3234044T3/pl unknown
- 2015-12-14 ES ES15823640T patent/ES2835826T3/es active Active
- 2015-12-14 RU RU2017123020A patent/RU2700063C2/ru active
- 2015-12-14 BR BR112017012737-7A patent/BR112017012737B1/pt active IP Right Grant
- 2015-12-14 MA MA40649A patent/MA40649B1/fr unknown
- 2015-12-14 CN CN201580073057.7A patent/CN107406706B/zh active Active
- 2015-12-14 EP EP15823640.6A patent/EP3234044B1/fr active Active
- 2015-12-14 MX MX2017007870A patent/MX369785B/es active IP Right Grant
- 2015-12-14 AU AU2015366058A patent/AU2015366058B2/en not_active Ceased
- 2015-12-14 TN TN2017000251A patent/TN2017000251A1/fr unknown
- 2015-12-14 US US15/536,999 patent/US10308063B2/en active Active
- 2015-12-14 CA CA2970842A patent/CA2970842A1/fr not_active Abandoned
- 2015-12-17 AR ARP150104133A patent/AR103148A1/es active IP Right Grant
-
2017
- 2017-07-11 ZA ZA2017/04673A patent/ZA201704673B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4209332A (en) * | 1978-08-24 | 1980-06-24 | Sakura Color Products Corp. | Method for manufacturing pencil leads |
WO2001043987A1 (fr) | 1999-12-13 | 2001-06-21 | Conte | Procede de fabrication par tri-extrusion d'un crayon a ecrire ou a colorier et crayon a ecrire ou a colorier comportant une couche intermediaire de protection |
DE102004021048A1 (de) * | 2004-04-29 | 2005-11-24 | Poloplast Gmbh & Co.Kg | Stift zum Schreiben, Zeichnen, Malen oder Ähnlichem |
US20110118383A1 (en) | 2008-07-15 | 2011-05-19 | J.S. Staedtler Gmbh & Co. Kg | Pencil lead for writing, drawing and/or painting devices |
EP2660072A1 (fr) | 2010-12-30 | 2013-11-06 | Ying Liu | Stylo colorisé à élasticité et plasticité élevées et procédé de fabrication associé |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3065006A1 (fr) * | 2017-04-10 | 2018-10-12 | Societe Bic | Mine de crayon a papier |
WO2018189467A1 (fr) | 2017-04-10 | 2018-10-18 | Societe Bic | Mine de crayon a papier |
US11072722B2 (en) | 2017-04-10 | 2021-07-27 | Societe Bic | Pencil lead |
WO2020127320A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127209A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127341A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
WO2020127203A1 (fr) | 2018-12-18 | 2020-06-25 | Societe Bic | Gaine de mine pour crayon, et crayon associé pour l'écriture, le dessin, le marquage, le traçage et la mise en couleur |
US11485165B2 (en) | 2018-12-18 | 2022-11-01 | SOCIéTé BIC | Lead casing for pencil, and pencil thereof for writing, drawing, marking, plotting, and coloring |
US11524518B2 (en) | 2018-12-18 | 2022-12-13 | SOCIéTé BIC | Lead casing for pencil, and pencil thereof for writing, drawing, marking, plotting, and coloring |
US11865855B2 (en) | 2018-12-18 | 2024-01-09 | SOCIéTé BIC | Lead casing for pencil, and pencil thereof for writing, drawing, marking, plotting, and coloring |
US20210206989A1 (en) * | 2020-01-06 | 2021-07-08 | SOCIéTé BIC | Lead for pencil for writing, drawing, marking, plotting and/or coloring |
Also Published As
Publication number | Publication date |
---|---|
EP3234044A1 (fr) | 2017-10-25 |
RU2700063C2 (ru) | 2019-09-12 |
ES2835826T3 (es) | 2021-06-23 |
CA2970842A1 (fr) | 2016-06-23 |
FR3030364B1 (fr) | 2017-01-13 |
CN107406706A (zh) | 2017-11-28 |
US20180001694A1 (en) | 2018-01-04 |
US10308063B2 (en) | 2019-06-04 |
RU2017123020A3 (fr) | 2019-04-08 |
MA40649B1 (fr) | 2018-09-28 |
EP3234044B1 (fr) | 2020-10-07 |
MX369785B (es) | 2019-11-21 |
RU2017123020A (ru) | 2019-01-18 |
AU2015366058B2 (en) | 2019-06-13 |
ZA201704673B (en) | 2018-12-19 |
PL3234044T3 (pl) | 2021-04-06 |
BR112017012737A2 (pt) | 2018-01-02 |
AR103148A1 (es) | 2017-04-19 |
AU2015366058A1 (en) | 2017-07-06 |
MA40649A1 (fr) | 2017-09-29 |
BR112017012737B1 (pt) | 2022-06-14 |
FR3030364A1 (fr) | 2016-06-24 |
MX2017007870A (es) | 2018-03-21 |
TN2017000251A1 (fr) | 2018-10-19 |
CN107406706B (zh) | 2021-03-19 |
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