High-blackness graphite resin pencil and production process thereof

Abstract

The invention relates to a high-blackness graphite resin pencil which comprises a penholder, a coat and a refill. The refill comprises, by weight, 20-30 parts of polystyrene, 10-20 parts of SBS (styrene butadiene styrene), 20-30 parts of graphite, 30-50 parts of modified talcum powder, 1-5 parts of a lubrication additive, 2-3 parts of rosin resin and 3-6 parts of modified polycarbonate. The high-blackness graphite resin pencil has the advantages that high-polymer materials are adopted, so that the pencil produced according to scientific and reliable formula has physical and mechanical properties and cutting properties of a wood pencil and is resistant to smashing and bending, lubricant in writing and appropriate in concentration and abrasion, and various forming processes can be performed on ordinary processing equipment.

Description

technical field

[0001] The invention belongs to the field of pens, and relates to a plastic colored pencil, in particular to an environmentally friendly, smooth, high-blackness graphite resin pencil with more uniform coloring of the pen core, beautiful appearance, and smoother drawing, and a production process thereof. Background technique

[0002] Pencil is a very widely used tool for writing and drawing. Its main structure is to form a strip lead embedded in the pen holder. The pen holder of a pencil is usually made of wood, and it is usually necessary to make a log into a pen holder in a shape such as a circle, a regular hexagon, or a regular octagon. Consume a lot of high-quality wood. At present, my country's annual output of wooden pencils is about 8 billion, which is equivalent to destroying 600 square kilometers of forest every year and consuming 400,000 cubic meters of high-quality wood. The consumption of a large amount of forest resources has seriously damaged th...

Examples

Embodiment 1

[0035] A graphite resin pencil with high blackness comprises a pen holder, a skin and a pen core, and the pen core comprises the following raw materials in parts by weight: 20 parts of polystyrene, 10 parts of SBS, 20 parts of graphite, 30 parts of modified talcum powder, 1 part of lubricating aid, 2 parts of rosin-based resin and 3 parts of modified polycarbonate.

[0036] The modification method of modified talcum powder is:

[0037] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0038] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0039] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0040] 4) Take out to obtain modified talcum powder.

[0041] The lubricating aid is ethylene bis stearamide.

...

Embodiment 2

[0053] A high-blackness graphite resin pencil, comprising a penholder, an epidermis and a pen core, the pen core comprising the following raw materials in parts by weight: 25 parts of polystyrene, 13 parts of SBS, 22 parts of graphite, 35 parts of modified talcum powder, 3 parts of lubricating aid, 2.5 parts of rosin-based resin and 4 parts of modified polycarbonate.

[0054] The modification method of modified talcum powder is:

[0055] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0056] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0057] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0058] 4) Take out to obtain modified talcum powder.

[0059] The lubricating aid is polyethylene glycol.

[...

Embodiment 3

[0071] A high-blackness graphite resin pencil, comprising a penholder, an epidermis and a pen core, the pen core comprising the following raw materials in parts by weight: 30 parts of polystyrene, 20 parts of SBS, 30 parts of graphite, 50 parts of modified talcum powder, 5 parts of lubricating aid, 3 parts of rosin-based resin and 6 parts of modified polycarbonate.

[0072] The modification method of modified talcum powder is:

[0073] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0074] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0075] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0076] 4) Take out to obtain modified talcum powder.

[0077] The lubricant aid is oleic acid amide.

[0078] T...

technical field

[0001] The invention belongs to the field of pens, and relates to a plastic colored pencil, in particular to an environmentally friendly, smooth, high-blackness graphite resin pencil with more uniform coloring of the pen core, beautiful appearance, and smoother drawing, and a production process thereof. Background technique

[0002] Pencil is a very widely used tool for writing and drawing. Its main structure is to form a strip lead embedded in the pen holder. The pen holder of a pencil is usually made of wood, and it is usually necessary to make a log into a pen holder in a shape such as a circle, a regular hexagon, or a regular octagon. Consume a lot of high-quality wood. At present, my country's annual output of wooden pencils is about 8 billion, which is equivalent to destroying 600 square kilometers of forest every year and consuming 400,000 cubic meters of high-quality wood. The consumption of a large amount of forest resources has seriously damaged th...

Examples

Embodiment 1

[0035] A graphite resin pencil with high blackness comprises a pen holder, a skin and a pen core, and the pen core comprises the following raw materials in parts by weight: 20 parts of polystyrene, 10 parts of SBS, 20 parts of graphite, 30 parts of modified talcum powder, 1 part of lubricating aid, 2 parts of rosin-based resin and 3 parts of modified polycarbonate.

[0036] The modification method of modified talcum powder is:

[0037] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0038] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0039] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0040] 4) Take out to obtain modified talcum powder.

[0041] The lubricating aid is ethylene bis stearamide.

...

Embodiment 2

[0053] A high-blackness graphite resin pencil, comprising a penholder, an epidermis and a pen core, the pen core comprising the following raw materials in parts by weight: 25 parts of polystyrene, 13 parts of SBS, 22 parts of graphite, 35 parts of modified talcum powder, 3 parts of lubricating aid, 2.5 parts of rosin-based resin and 4 parts of modified polycarbonate.

[0054] The modification method of modified talcum powder is:

[0055] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0056] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0057] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0058] 4) Take out to obtain modified talcum powder.

[0059] The lubricating aid is polyethylene glycol.

[...

Embodiment 3

[0071] A high-blackness graphite resin pencil, comprising a penholder, an epidermis and a pen core, the pen core comprising the following raw materials in parts by weight: 30 parts of polystyrene, 20 parts of SBS, 30 parts of graphite, 50 parts of modified talcum powder, 5 parts of lubricating aid, 3 parts of rosin-based resin and 6 parts of modified polycarbonate.

[0072] The modification method of modified talcum powder is:

[0073] 1) Weigh 100 parts of the dried talcum powder material and put it into a temperature-controllable high mixer;

[0074] 2) Weigh 5 parts of modifier propylene glycol laurate and α, ω-bis(trimethylsiloxy) polydimethyl polymethyl (1-butane-polyoxyethylene polyoxypropylene ether) siloxane 3 copies;

[0075] 3) Add the weighed modifier evenly into the talcum powder in the high mixer, and stir for 15 minutes at a temperature of 200°C;

[0076] 4) Take out to obtain modified talcum powder.

[0077] The lubricant aid is oleic acid amide.

[0078] T...