JP2001316608A - Solid drawing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid drawing material which exhibits a good fixability in drawing, gives a high-density picture, and does not stain hands or fingers even when it is held by hand in drawing. SOLUTION: This drawing material at least contains a pigment, a polar thermoplastic resin, a nonpolar thermoplastic resin, a wax, and a fatty acid monoglyceride having a melting point of 35 deg.C or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solid drawing material,
More specifically, the present invention relates to a solid drawing material in which the density of a drawing mark is high and which does not stain a finger or the like even when the solid drawing material itself is used.

[0002]

2. Description of the Related Art Conventionally, a solid drawing material requires pigments, petroleum waxes such as paraffin wax and microcrystalline wax, and / or plant and animal waxes such as carnauba wax, wood wax and beeswax. Depending on the extender pigment and an oil component such as petrolatum, spindle oil and mineral oil, a so-called crayon, a soft solid drawing material called pass, a pigment, an extender pigment, a resin such as polyethylene, and a synthesis of polyethylene wax and the like. With wax,
There is known a hard solid drawing material called a plastic crayon comprising a petroleum wax such as paraffin wax and microcrystalline wax and, if necessary, a lubricant such as stearic acid.

[0003]

The above-mentioned soft solid drawing material has a high density of traces of drawing, but has a drawback that fingers and the like become dirty when used unless the surface is covered with paper, plastic film or the like. Yes, and the hard solid drawing material does not stain your fingers even if you use it naked,
There is a drawback that the drawing trace is thin. Therefore, the present invention
The present invention has been completed in order to obtain a solid drawing material which is a hard solid drawing material type and has a high density of drawing marks.

[0004]

SUMMARY OF THE INVENTION The present invention provides a solid drawing material comprising at least a pigment, a polar thermoplastic resin, a non-polar thermoplastic resin, a wax, and a glycerin fatty acid ester having a melting point of 35 ° C. or higher. It is the gist.

Hereinafter, the present invention will be described in detail. The pigment used in the solid drawing material of the present invention is used as a coloring material, and is conventionally known, such as carbon black, titanium oxide, iron black, ultramarine, petal, zinc oxide, phthalocyanine blue, phthalocyanine green, and watch. Ngured, Carmin 6
Any inorganic pigment such as B or Hansa Yellow or an organic pigment can be used, and they may be used alone or in combination of two or more. The amount used varies greatly depending on the type of pigment, but is preferably 3 to 40% by weight based on the total amount of the solid drawing material in consideration of color development and drawing properties.

The polar thermoplastic resin and the non-polar thermoplastic resin form a solid drawing material and prevent stains on fingers and the like. The polar thermoplastic resin includes polyvinyl chloride, Polyvinyl acetate, polymethyl methacrylate, polyvinylidene chloride, polytetrafluoroethylene, ethylene-polytetrafluoroethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer Coalescence, ethylene-methyl acrylate copolymer, AS resin, ABS
Resins, AAS resins, ACS resins, and the like, and non-polar thermoplastic resins include polyethylene, polypropylene, polybutadiene, polystyrene, polymethylpentene, polybutene, and styrene-butadiene resin. Each of the polar thermoplastic resin and the non-polar thermoplastic resin can be used alone or in combination of two or more. The amount of the polar thermoplastic resin used is preferably 1 to 8% by weight based on the total amount of the solid drawing material, and the amount of the nonpolar thermoplastic resin used is preferably 10 to 30% by weight based on the total amount of the solid drawing material. . Further, the ratio of the polar thermoplastic resin to the non-polar thermoplastic resin is preferably 1: 4 to 5 by weight. This is because if the ratio of the non-polar thermoplastic resin is more than 5, the solid drawing material is difficult to collapse and the drawing density may be reduced, and if the ratio is less than 4, the solid drawing material is more likely to collapse, This is because the fixability of the drawing trace may be reduced.

[0007] Waxes are used to improve the application performance of solid drawing materials, and include animal waxes such as beeswax, whale wax, insect white wax, candelilla wax, carnauba wax, wood wax and the like. Natural waxes such as vegetable waxes, mineral waxes such as montan wax and ozokerite, paraffin wax, petroleum waxes such as microcrystalline wax, Fischer-Tropsch wax, low molecular weight polyethylene and derivatives thereof, montan wax, paraffin wax, micro Each derivative of crystallin wax, synthetic wax such as cetyl alcohol, stearic acid, polyethylene glycol stearate, caster wax and the like can be mentioned. These substances may be used alone or in combination of two or more. The used amount is 30 to the total amount of the solid drawing material.
70% by weight is preferred.

The glycerin fatty acid ester having a melting point of 35 ° C. or more shows a solid state at normal temperature and is used for improving the drawing density of a solid drawing material. Specifically, glycerin monomyristate (melting point 47-5)
Glycerin monostearate (melting point 63-68)
C), glycerin monoisostearate, glycerin monopalmitate (melting point 62-68 ° C), glycerin monooleate (melting point 37-43 ° C), glycerin monolinoleate (melting point 35-40 ° C), glycerin monobehenate (melting point Monoglycerides such as glycerin mono 12-hydroxystearate (melting point 71 to 77 ° C.) and glycerin monolaurate (melting point 54 to 60 ° C.). These substances may be used alone or in combination of two or more. The amount used is preferably 0.5 to 7.0% by weight based on the total amount of the solid drawing material. This is 0.5
If the amount is less than 10% by weight, the effect may not be sufficiently obtained, and if the amount is more than 7.0% by weight, stickiness may occur on the surface of the solid drawing material.

In addition, if necessary, extenders such as mica, clay, kaolin, talc, calcium carbonate, silica, barium sulfate, etc., which are conventionally known as extenders or fillers, may be added to the total amount of the solid drawing material, if necessary. Of course, it is possible to use 1 to 30% by weight or to use metal soap in combination.

The solid drawing material of the present invention can be manufactured by using a conventionally known method for manufacturing a solid drawing material. For example, each of the above components is heated and stirred and mixed, and if necessary, kneaded with a kneader such as a kneader or a roll mill, and then cooled, pulverized, and pelletized. This pellet is injected and
There is a method of molding as a solid drawing material using a press-fitting or extrusion molding machine.

[0011]

The polar thermoplastic resin and the non-polar thermoplastic resin used in the solid drawing material according to the present invention are blended so that the polar thermoplastic resin is dispersed in the non-polar thermoplastic resin to form a sea-island structure. Since this becomes a collapse point of the solid drawing material at the time of drawing, it collapses in a large amount without difficulty at the time of drawing. In addition, glycerin fatty acid amide, which is in a solid state at normal temperature, lowers the surface tension of the solid drawing material and wets the paper well, so that the fixability to paper is improved. Therefore, the solid drawing material according to the present invention has good fixability of a largely broken drawing material, and has a high density of a trace of drawing. Further, since the resin wraps the pigment and the like, it becomes a solid drawing material that does not stain fingers and the like.

[0012]

Embodiments of the present invention will be described below. Example 1 Titanium oxide 3 parts by weight Phthalocyanine blue 7 parts by weight AS resin (polar thermoplastic resin) 5 parts by weight Polybutene (non-polar thermoplastic resin) 25 parts by weight 130 ° F paraffin wax 58 parts by weight Glycerin monostearate (melting point 65) ° C) 2 parts by weight The above components are heated, mixed and stirred at 110 to 130 ° C, cooled with a cooling belt, crushed and pelletized. The pellets were injection molded with an injection molding machine set at 110 to 120 ° C. to obtain a blue solid drawing material.

Example 2 Titanium oxide 2 parts by weight Carmine 6B 5 parts by weight Ethylene-vinyl acetate copolymer (polar thermoplastic resin) 4 parts by weight Polyethylene (non-polar thermoplastic resin) 20 parts by weight Polyethylene wax 20 parts by weight 130 ° F paraffin wax 30 parts by weight Glycerin mono 12-hydroxystearate (melting point 74 ° C.) 5 parts by weight Talc 14 parts by weight The above components were used in the same manner as in Example 1 to obtain a red solid drawing material.

Example 3 Titanium oxide 2 parts by weight Phthalocyanine green 6 parts by weight Ethylene-methyl acrylate copolymer (polar thermoplastic resin) 5 parts by weight Polyethylene (non-polar thermoplastic resin) 15 parts by weight Polystyrene (non-polar thermoplastic resin) 5 parts by weight Polyethylene wax 10 parts by weight 130 ° F paraffin wax 32 parts by weight Microcrystalline wax 5 parts by weight Glycerin monomyristate (melting point 51 ° C) 2 parts by weight Glycerin mono 12-hydroxystearate (melting point 74 ° C) 2 parts by weight 6 parts by weight of calcium carbonate 10 parts by weight of zinc stearate The above components were made in the same manner as in Example 1 to obtain a green solid drawing material.

Example 4 Titanium oxide 1 part by weight Hansa Yellow 10 parts by weight Ethylene-ethyl acrylate copolymer (polar thermoplastic resin) 3 parts by weight Ethylene-acrylic acid copolymer (polar thermoplastic resin) 2 parts by weight Polyethylene ( 13 parts by weight Polybutadiene (non-polar thermoplastic resin) 10 parts by weight Polyethylene wax 15 parts by weight 130 ° F paraffin wax 20 parts by weight Carnauba wax 10 parts by weight Glycerin monolaurate (melting point 57 ° C.) 1 part by weight Parts glycerin monooleate (melting point 39 ° C.) 2 parts by weight Talc 5 parts by weight Calcium carbonate 3 parts by weight Calcium stearate 5 parts by weight The above components were made in the same manner as in Example 1 to obtain a yellow solid drawing material.

Comparative Example 1 A blue solid drawing material was obtained in the same manner as in Example 1 except that polybutene was omitted.

Comparative Example 2 A red solid drawing material was obtained in the same manner as in Example 2 except that glycerin mono 12-hydroxystearate was omitted.

Comparative Example 3 A green solid drawing material was obtained in the same manner as in Example 3, except that the ethylene-methyl acrylate copolymer was omitted.

Comparative Example 4 A yellow solid drawing material was obtained in the same manner as in Example 4 except that glycerin monolaurate and glycerin monooleate were omitted.

Using the solid drawing materials obtained in Examples 1 to 4 and Comparative Examples 1 to 4, a density test and a stain test were performed. Table 1 shows the results.

Density test: The tip of the solid drawing material obtained in each example was shaved with a commercially available pencil sharpener, the writing angle was 75 °, and the writing pressure was 2.9.
Writing was performed at 4 N at a writing speed of 20 mm / sec with a record streaker (Model PS-5, manufactured by Precision Industrial Research Institute Co., Ltd.). Test paper used was coated paper. After writing,
Drawing traces are transferred to a color computer (Model SM-
4, Suga Test Machine Co., Ltd.). (A smaller Y value indicates a higher density.)

Stain test: Drawing is performed with a color axis. At that time, dirt on the fingers is observed and visually evaluated. ：: no finger stain, ×: finger stain

[0023]

[Table 1]

Examples 1 to 4 were in a good coating state, while Comparative Examples 1 and 3 showed slight peeling, while Comparative Examples 2 and 4
In No. 4, much peeling of the coating film was observed.

[0025]

As described in detail above, the solid drawing material according to the present invention has excellent properties as a solid drawing material having good fixability of a coating film, high drawing density, and no stains such as fingers. It is shown.

Claims (3)

[Claims] 1. A solid drawing material comprising at least a pigment, a polar thermoplastic resin, a non-polar thermoplastic resin, a wax, and a glycerin fatty acid ester having a melting point of 35 ° C. or higher. 2. The solid drawing material according to claim 1, wherein the ratio between the polar thermoplastic resin and the non-polar thermoplastic resin is 1: 4 to 5 by weight. 3. The solid drawing material according to claim 1, wherein the glycerin fatty acid ester is a monoglyceride.