JP2641698B2 - Marking material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, paper, wood, stone,
The present invention relates to a marking material capable of writing characters, pictures, lines, and the like on various objects to be written such as asphalt, concrete, metal, and glass.

[0002]

2. Description of the Related Art Crayons and the like are conventionally known as writing implements for writing characters, pictures, lines and the like on a work to be written such as paper. For example, white ink is known as a writing implement for writing characters, pictures, lines, and the like on a writing object such as stone, asphalt, concrete, or the like. The crayon and chalk are formed in a bar shape as a whole.

[0003]

However, the crayon and chalk described above are so soft that they are easily worn away, and
It is easy to break. Therefore, it cannot be used for a long period of time, which is uneconomical. Crayons and chalk are soft, and their hands are easily stained when held. Furthermore, crayons are prone to so-called discoloration, and have a risk of being deformed or out of shape when exposed to high temperatures (for example, in summer). In addition, crayon and chalk have the drawback that if characters, pictures, lines, etc., written on the writing object are rubbed by other writing objects or hands, they will spread out and become blurred, making them difficult to see. doing.

[0004] Further, since the crayon and chalk are formed in the shape of a bar as a whole, if they are worn down by writing, the shape of the tip becomes round. For this reason, when writing a character, a picture, a line, etc. on a to-be-written object, it is difficult to adjust the size of a character, a picture, etc., or the thickness of a line, etc.

[0005] In other words, the above-mentioned crayon and chalk have poor usability. Therefore, there is a need for a writing implement, that is, a marking material, capable of writing characters, pictures, lines, and the like on various objects to be written, such as paper, wood, stone, asphalt, concrete, metal, and glass.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a so-called easy-to-use marking material.

[0007]

According to a first aspect of the present invention, there is provided a marking material comprising a mixture of a waxy substance and a pigment.
The main component of the wax-like substance is a saturated chain hydrocarbon, and the weight ratio of carbon to hydrogen (C / H) is 5.839 to
6.018, and the total weight percent of carbon and hydrogen is 9
8.5% to 100%, the number average molecular weight (Mn) is 3.0 × 10 ^{3 to} 1.0 × 10 ⁴ , and the weight average molecular weight (Mw) is 1.0 × 10 ^{4 to} 5.0. × 10 ⁴
Mw / Mn is 1.0 to 5.0 der is, the wax-like material
Quality, heats and melts synthetic resin waste, and
It is characterized by comprising by solution reaction.

According to a second aspect of the present invention, there is provided a marking material according to the first aspect of the present invention, wherein the entire shape is substantially wedge-shaped, and the marking material is applied to a writing object. The tip to be touched is formed flat, and the angle between the upper surface and the lower surface of the tip is 10
It is characterized in that it is formed in {-30}.

[0009]

According to the constitution of the first aspect, the main component of the wax-like substance used for the marking material is a saturated chain hydrocarbon, and the weight ratio (C / H) of carbon to hydrogen is 5.839 to 66.0. .
018, and the total weight% of carbon and hydrogen is 98.5% or more.
100%, and the number average molecular weight (Mn) is 3.0 × 10 ³ to
1.0 × 10 ⁴ and a weight average molecular weight (Mw) of 1.0 × 10 ⁴
5.0 × 10 ⁴ , and Mw / Mn is 1.0 to 5.0.
For this reason, the marking material obtained by mixing the wax-like substance and the pigment does not deteriorate and has excellent stability. Further, physical properties of the wax-like substance, such as various physical properties such as melting point, viscosity, and hardness, are excellent in workability and fall within a predetermined range suitable for use as a marking material.

As a result, a so-called easy-to-use marking material can be provided. In other words, the marking material can write characters, pictures, lines, etc. on various objects to be written, such as paper, wood, stone, asphalt, concrete, metal, glass, and the like. It will be good. Further, the marking material is harmless and moderately hard, so that the hands are not stained when held, and so-called discoloration does not occur. Furthermore, the marking material is not spread and blurred even when characters, pictures, lines, and the like written on the writing object are rubbed by other writing objects or hands, and do not spread even when wet with water. . Therefore, characters, pictures, lines, and the like written on the object to be written are maintained in an easily viewable state.

Further, since the marking material is moderately hard, it is difficult to be worn down, and when it is formed into a predetermined shape, it is hard to be broken. Therefore, the marking material can be used for a long time and is economical. Further, the marking material does not deform or lose its shape even when exposed to high temperatures (for example, in the summer). Further, the wax <br/> scan matter, for example, a synthetic resin wastes such as polyethylene resin and polypropylene resin heated and melted, it is possible to obtain by thermal decomposition reaction in oxygen deficiency, mer
King material can be manufactured at low cost.

According to the second aspect of the present invention, the marking material has a substantially wedge-shaped overall shape, and a flat tip portion to be in contact with the object to be written. The angle between the upper surface and the lower surface of the tip is 10 ° to 3 °.
0 °.

Thus, the marking material can smoothly write characters, pictures, lines, etc. on the object to be written, and does not require much force when writing. In addition, the marking material gradually wears from the front end portion by writing, but the shape and angle of the front end portion are always kept almost constant. For this reason, when writing a character, a picture, a line, etc. on a to-be-written object, the marking material is easy to adjust the size of a character, a picture, etc., or the thickness of a line, etc.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The marking material according to this embodiment is obtained by mixing a wax-like substance and a pigment by a predetermined method. As a mixing method of mixing the wax-like substance and the pigment, for example, after melting the wax-like substance, after adding the pigment to the wax-like substance in a molten state,
The two may be mixed by stirring, or for example, the wax-like substance and the pigment may be mixed by kneading using a kneader, for example. The mixing method is not limited to the method described above.

As shown in FIGS. 1 and 2, the marking material 10 has a substantially wedge-like overall shape.
In other words, the upper surface 10a of the marking material 10 is substantially flat so that the distal end portion 12 is thicker than the distal end portion 11 to be brought into contact with the workpiece 20, and the lower surface 10b
Has a curved surface. The tip 1 of the marking material 10
1 is formed flat, the upper surface 10a and the lower surface 10b
Is 10 ° to 30 °, preferably 15 ° to 25 °.
°, more preferably about 20 °.

The shape of the end portion 12 of the marking material 10 is as follows:
The writing object 20 is formed in a shape that allows easy writing of characters, pictures, lines, and the like, that is, a shape that is easy for the user to hold. For example, a hole for passing a string or the like may be formed in the end portion 12 so as to be convenient for carrying or storing the marking material 10. In addition, characters such as a color name and a product name may be engraved on the end portion 12 and the center portion 13, for example. Furthermore, when the marking material 10 is mainly used for a child, a relief of a picture such as an animal may be provided on the end portion 12 or the center portion 13. The method for forming the marking material 10 into the above-described shape is not particularly limited.

Examples of the object to be written 20 include, but are not limited to, paper, wood, stone, asphalt, concrete, metal, glass and the like. That is, the marking material 10 is capable of writing characters, pictures, lines, and the like on various objects to be written as described above.

As the pigment provided for the marking material 10, inorganic pigments such as metal salts and organic pigments such as dye lakes can be used. The pigment may be any harmless substance that does not act on the wax-like substance, is insoluble in a solvent such as water or alcohol, and has a clear, predetermined color. The pigment only needs to be excellent in heat resistance, light resistance, weather resistance, and dispersibility with respect to a wax-like substance, and has no migration property (so-called color transfer or discoloration). The wax-like substance provided for the marking material 10 will be described later.

The mixing ratio of the wax-like substance and the pigment, that is, the content of the pigment in the marking material 10 depends on the degree of coloring of the pigment on the writing object 20 or the ease of writing the marking material 10. What is necessary is just to set it in consideration. The content of the pigment in the marking material 10 is, for example, preferably about 40% by weight to 60% by weight, and particularly preferably about 50% by weight. Incidentally, the content of the pigment is not limited to the above-mentioned weight%.

The wax-like substance provided for the marking material 10 is obtained, for example, by subjecting a synthetic resin, which is a raw material that has been heated and melted, to a thermal decomposition reaction. Examples of the synthetic resin include non-crosslinked, low-crosslinked, or highly crosslinked polyolefins such as polyethylene resins and polypropylene resins, and polystyrene resins. The synthetic resin is not particularly limited as long as it is a resin capable of obtaining a waxy substance by a thermal decomposition reaction. For example, waxy substances can be produced at low cost from synthetic resin waste such as polyethylene resin and polypropylene resin. The method for producing the wax-like substance will be described later in detail.

Next, various physical properties of the wax-like substance will be described. Elemental analysis of waxy substances,
This was performed by the following method. The molecular weight and molecular weight distribution of the waxy substance were measured by the following methods. Further, various physical properties (physical properties) of the waxy substance were measured. That is, the melting point and specific gravity of the wax-like substance were measured by the following methods, and a flow test, a hardness test, a tensile test, and a bending test were performed by the following methods. Table 1 summarizes the obtained results.

[Elemental Analysis] Each weight% (wt%) of carbon, hydrogen, nitrogen and sulfur and each content (μg / g) of total chromium, cadmium and lead were measured. Each weight% of carbon, hydrogen and nitrogen was measured by a C, H and N meter. The weight percentage of sulfur was measured by a turbidimetric method after burning by a combustion tube type quartz tube oxygen method based on JIS K2541. Each content of total chromium, cadmium and lead was measured by the atomic absorption method. Each measurement was performed under the conditions of a test room temperature of 19 ° C.

[Molecular Weight and Molecular Weight Distribution] The number average molecular weight (Mn) and the weight average molecular weight (Mw) were measured by GPC. Measurement conditions were as follows: Column: AD80M / S Mobile phase: o-dichlorobenzene Detector: IR (3.42 μm) Temperature: 140 ° C Flow rate: 1.0 ml / min. Sample concentration: 2.0 mg / ml The test was performed at room temperature of 22 ° C.

[Melting point] Based on JIS K 7122,
The melting peak temperature (° C.) was measured by the DSC method. The tester is DSS-220C manufactured by Seiko Electronic Industry Co., Ltd.
It was used. The measurement conditions were as follows: heating rate: 10 ° C./min. The measurement was performed at a test room temperature of 21 ° C.

[Specific gravity] Based on JIS K 7112,
It was measured by the underwater displacement method. The measurement was performed at the test room temperature 21
The test was performed under the condition of ° C.

[Flow test] Based on JIS K 7210, the viscosity (poise) was measured using a Koka type flow tester.
And the melting start temperature (° C.) were measured. The viscosity is 40 ℃,
The values at 60 ° C, 80 ° C, and 100 ° C were measured by a constant temperature test. The measurement conditions were as follows: Die diameter: 1 mm Test load: 10 kgf to 500 kgf The melting start temperature was measured by a temperature rise test. The measurement conditions were as follows: die diameter: 1 mm, test load: 10 kgf, heating rate: 3 ° C./min.

[Hardness test] Hardness (HDD) was measured according to JIS K 7215. The measurement was performed under the conditions of a test room temperature of 21 ° C.

[Tensile test] Tensile strength (kgf / cm ² ) was measured based on JIS K 7113. The measurement conditions were as follows: Test piece: Type 1 Test speed: 50 mm / min. The measurement was performed at a test room temperature of 21 ° C.

[Bending test] Based on JIS K 7203, bending strength (kgf / mm ² ), bending elastic modulus (kgf / mm ² )
The pushing amount (mm) before breaking and the pushing amount (mm) until yielding were measured. The measurement conditions were as follows: Test piece: 80 mm × 10 mm × 2 (t) mm Test speed: 1 mm / min. Distance between fulcrums: 30 mm The measurement was performed at a test room temperature of 21 ° C.

[0031]

[Table 1]

The results of the above measurements will be discussed below.

First, the analysis results of elemental analysis, molecular weight and molecular weight distribution will be considered. The molecular formula of the saturated chain hydrocarbon (paraffin hydrocarbon) is represented by C _n H _{2n + 2} .
Since the atomic weight of carbon is 12.011, and the atomic weight of hydrogen is 1.00794, the weight ratio (C / H) between carbon and hydrogen is approximately 5.958.
Becomes

The weight ratio of the waxy substance is 5.909.
Also, the total weight percent of carbon and hydrogen is 98.8%.
That is, it is understood that the main component of the wax-like substance is composed of a saturated chain hydrocarbon. Further, the wax-like substance has a number average molecular weight (Mn) of 6.5 × 10 ³ , a weight average molecular weight (Mw) of 2.2 × 10 ⁴ , and Mw / Mn of 3.3.

The waxy substances have different physical properties if they have different compositions, molecular weights and molecular weight distributions. The waxy substance is a mixture of various saturated chain hydrocarbons,
The various physical properties appear as an overall result of the complex crystal structure of the component hydrocarbon. Therefore, it is considered that the physical properties of the wax-like substance are expressed when the composition, molecular weight, and molecular weight distribution are delicately related to each other.

Next, the measurement results of the melting point, the flow test, and the hardness test will be considered. The wax-like substance has a melting peak temperature of 108 ° C, a melting start temperature of 97 ° C, and a hardness of 48HD.
D, viscosity is 6.6 × 10 ⁶ poise at 60 ℃, 2.3 × 10 ⁴ poi at 80 ℃
se, 3.0 × 10 ³ poise at 100 ° C. (viscosity at 40 ° C. could not be measured because no waxy material melted). Therefore, it is understood that the marking material 10 does not deform or lose its shape even when exposed to a high temperature (for example, in the summer). Further, it can be seen that the marking material 10 is moderately hard, so that the hands are not stained when held, and that so-called discoloration does not occur.

Next, the test results of the tensile test and the bending test will be considered. The waxy substance has a tensile strength of 66 k
gf / cm ² , flexural strength 0.96 kgf / mm ² , flexural modulus 46 kgf
/ mm ² , and the indentation amount before breaking was 1.85 mm (the indentation amount before yielding was unmeasurable because the test piece was broken at 1.85 mm). For this reason, even if various stresses, such as a compressive stress and a tensile stress, which occur when the tip portion 11 is pressed against the writing object 20, are applied to the marking material 10,
No fine cracks occur on the surface. In addition, the marking material 10 has good sliding when writing a character, a picture, a line, or the like on the writing object 20. Furthermore, the marking material 10
Is moderately hard, so it is difficult to be worn and broken.
Incidentally, the waxy substance is hard but not brittle, and therefore,
No inconvenience occurred when processing the marking material 10.

As is clear from the above results, the marking material 10 using the above-mentioned wax-like substance has good usability. In addition, the above-mentioned waxy substance is
Harmless.

Next, the inventor of the present application diligently studied the range of each physical property of the wax-like substance in the marking material 10 which can provide good usability. As a result, it is not clear which of the above physical properties has a great effect on the usability of the marking material 10, but if the physical properties of the wax-like substance are within the following ranges, the marking material 1
It turned out that usability of 0 was good.

That is, the weight ratio of carbon to hydrogen (C / H)
Is preferably 5.839 to 6.018. The total weight percent of carbon and hydrogen is preferably from 98.5% to 100%. The number average molecular weight (Mn) is preferably 3.0 × 10 ³ to 1.0 × 10 ⁴ , the weight average molecular weight (Mw) is preferably 1.0 × 10 ⁴ to 5.0 × 10 ⁴ , and Mw / Mn is preferably 1.0 to 5.0. . The melting peak temperature is preferably from 100 ° C to 120 ° C. Viscosity at 60 ° C
3.0 × 10 ⁶ poise ~ 1.2 × 10 ⁷ poise, 1.0 × 10 ⁴ poi at 80 ℃
se ~ 5.0 × 10 ⁴ poise, 1.0 × 10 ³ poise ~ 6.0 × 1 at 100 ℃
0 ³ poise is preferable, and the melting start temperature is preferably 90 ° C to 110 ° C. The hardness is preferably from 40 HDD to 60 HDD. The tensile strength is preferably from 55 kgf / cm ² to 75 kgf / cm ² . Flexural strength is preferably ^{0.8kgf / mm 2 ~1.2kgf / mm 2} , the flexural modulus is preferably ^{35 kgf / mm 2 ~55 kgf /} mm 2. The pushing amount before breaking is preferably 1.7 mm to 1.9 mm. It is preferable that the elasticity is hardly provided. If the properties of the wax-like substance are out of the above ranges, the usability of the marking material 10 becomes poor.

As described above, in the marking material 10 according to this embodiment, the main component of the wax-like substance provided for the marking material 10 is a saturated chain hydrocarbon, and the weight ratio of carbon to hydrogen (C / H) is 5.839 to 6.018, the total weight% of carbon and hydrogen is 98.5% to 100%, the number average molecular weight (Mn) is 3.0 × 10 ³ to 1.0 × 10 ⁴ , and the weight average molecular weight (Mw) is ) Is from 1.0 × 10 ⁴ to 5.0 × 10 ⁴ ,
Mw / Mn is 1.0 to 5.0.

For this reason, the marking material 10 formed by mixing the wax-like substance and the pigment does not deteriorate and has excellent stability. Further, the physical properties of the wax-like substance, for example, various physical properties such as melting point, viscosity, hardness, etc., are excellent in workability and fall within a predetermined range suitable for use as the marking material 10. Thereby, a so-called easy-to-use marking material 10 can be provided.

That is, the marking material 10 can write characters, pictures, lines, etc. on various objects to be written 20, such as paper, wood, stone, asphalt, concrete, metal, and glass. Good slippage when doing. In addition, the marking material 10 is harmless and moderately hard, so that the hands are not stained when held, and so-called discoloration does not occur. Furthermore, the marking material 10 does not spread and blur even if the characters, pictures, lines, and the like written on the writing object 20 are rubbed by other writing objects or hands, and even when wet with water. Does not bleed. Therefore, the written object 2
Characters, pictures, lines, and the like written in 0 are maintained in an easily viewable state.

Further, since the marking material 10 is moderately hard, it is hard to be worn down and hardly broken, so that it can be used for a long time and is economical. In addition, the marking material 10
Does not deform or lose its shape when exposed to high temperatures (eg, during the summer). The above marking material 10 is made of wax
Substances such as polyethylene resin or polypropylene resin
Heat and melt synthetic resin wastes such as fats
Low cost because it can be obtained by dissolving
It can be manufactured with

The marking material 10 according to the present embodiment
Has a substantially wedge-shaped overall shape and a flat end portion 11 to be brought into contact with the writing object 20.
It is, and the angle θ between the upper surface 10a and lower surface 10b of the tip portion 11 is formed in the 10 ° to 30 °.

Thus, the marking material 10 can smoothly write characters, pictures, lines, and the like on the workpiece 20 and does not require much force when writing. In addition, the marking material 10 is applied to the tip 1 by writing.
The shape and the angle θ of the distal end portion 11 are always kept almost constant, although the wear gradually decreases from 1. For this reason, when writing a character, a picture, a line, etc. on the to-be-written object 20, the marking material 10 can easily adjust the size of a character, a picture, etc., or the thickness of a line.

When it is desired to particularly reduce the size of a character or a picture to be written on the object to be written 20 or to make the thickness of a line or the like particularly thin, instead of holding as shown in FIG. , The lower surface 10b faces upward and the upper surface 10a faces downward. That is, the marking material 10
May be held in a state where it is turned over. When it is desired to particularly increase the size of a character, a picture, or the like to be written on the object to be written 20, or to particularly increase the thickness of a line or the like, instead of using the tip portion 11 side, the end portion 12 side is used. May be used.

Next, a method for producing the wax-like substance used for the marking material 10 will be described below by way of an example.

As shown in FIG. 3, a wax-like substance producing apparatus includes a storage tank 1 for storing a wax-like substance C.
It has. The storage tank 1 is supported by legs 1a. A cylindrical combustion basket 2 is integrally mounted and fixed to the tank upper end opening 1b of the storage tank 1. On the side wall of the combustion basket 2, countless air introduction holes 2b are formed. The upper end opening 2c of the combustion basket 2 is in an open state. In the lower part of the combustion basket 2,
Rostor 3, which is a convex raw material receiving tray, is installed so as to cover lower end opening 2a of combustion basket 2 from above. A number of rostr holes 3a are formed in the rostr 3. Then, the raw material A (to be described later) is placed on the roaster 3.

A closed box-shaped catalyst tank 4 is attached to the lower part of the combustion basket 2 so as to close the lower end opening 2a from below. The catalyst tank 4
The entire wall has a mesh portion 4a. The above-mentioned catalyst tank 4
The inside is filled with a catalyst for promoting a thermal decomposition reaction of the melt B (described later), for example, a linear catalyst 4b made of a metal such as platinum or copper. Then, the melt B passes between the linear catalysts 4b.

A cylindrical air balancer 5 is provided on the outer periphery of the combustion basket 2 in order to adjust the amount of air to be supplied to the combustion basket 2. The air balancer 5 is installed at a predetermined distance from the combustion basket 2. In addition, an opening 5a for introducing air is provided below the air balancer 5. The upper part of the air balancer 5 is open.

A plurality of communication pipes (not shown) are provided between the storage tank 1 and the combustion basket 2. These communication pipes are connected to a pump (not shown) for sending out gas generated in the storage tank 1 to the combustion basket 2.

A pipe-shaped heater 6 is provided at the inner bottom of the storage tank 1 in order to raise the temperature of the molten wax-like substance C. The heater 6 heats the wax-like substance C by electric heating or high-frequency heating. Further, a temperature sensor 7 such as a bimetal or a thermocouple for detecting the temperature of the wax-like substance C is provided inside the storage tank 1. The heater 6 is ON / OFF controlled or proportionally controlled by the control means 8. The control means 8 controls the heater 6 based on the signal from the temperature sensor 7 so as to keep the wax-like substance C at a predetermined temperature.

Next, a method for producing the wax-like substance C using the production apparatus having the above configuration will be described.

First, a predetermined amount of a raw material A composed of a synthetic resin, which is a raw material, and a fuel, which is a highly crosslinked polyethylene resin or a polypropylene resin, is charged into the combustion basket 2. Next, the synthetic resin is melted by igniting and burning the fuel, and a part of the synthetic resin is thermally decomposed to be reduced in molecular weight and liquefied. Then, a melt B, which is a mixture thereof, is dropped from the roastor holes 3a, passes between the linear catalysts 4b of the catalyst tank 4, and is dropped into the storage tank 1.

At this time, oxygen in the catalyst tank 4 and the storage tank 1 reacts with the melt B and is quickly consumed. Therefore, the inside of the catalyst tank 4 and the inside of the storage tank 1 are in an oxygen-deficient state. Thereby, the resin which has not been thermally decomposed or the resin which has not been thermally decomposed in the melt B is thermally decomposed mainly in the catalyst tank 4 in an oxygen-deficient state, and becomes a low molecular weight wax substance C. The wax-like substance C is stored in the storage tank 1 in a molten state.

The waxy substance C in a molten state
Is heated by the heater 6 and controlled by the temperature sensor 7 and the control means 8, so that its melting temperature is maintained at a predetermined temperature. Therefore, since the wax-like substance C is in an oxygen-deficient state and has a stable melting temperature, the high-heat gas G such as a flammable ethylene gas in which a part of the wax-like substance C is vaporized is used. It occurs stably. The melting temperature of the waxy substance C is about 600
It should just be set so that it may be set to ° C.

The hot gas G whose generation amount is controlled in this way is
Reaches the combustion basket 2 where the raw material A is burned, by ascending through the catalyst tank 4 and the rostral 3 or via a communication pipe and a pump (not shown). The high-heat gas G is mixed with air introduced from the air introduction holes 2b and burns. For this reason, the temperature in the combustion basket 2 is controlled to a predetermined temperature.
Thereby, the melting / decomposition of the raw material A continuously supplied to the combustion basket 2 is continued. The internal temperature of the combustion basket 2 is preferably about 1100 ° C.
The particulate carbon is also generated from the wax-like substance C together with the high-temperature gas G, and the generated particulate carbon is entirely burned in the combustion basket 2. Therefore, carbon soot does not adhere to the inside of the combustion basket 2. Therefore, carbon soot is not mixed into the wax-like substance C.

By the above method, a wax-like substance to be provided to the marking material 10 according to the present embodiment is manufactured.
Of course, the production apparatus and the production method of the wax-like substance are not limited to the production apparatus and the production method described above. That is, the wax-like substance provided to the marking material 10 according to the present embodiment is not limited to the one manufactured by the above-described method. That is, the waxy substance is
The marking material 10 may be manufactured in any manner as long as the marking material 10 has the function and effect that the so-called convenience is good.

[0060]

According to the first aspect of the present invention, there is provided a marking material comprising a mixture of a wax-like substance and a pigment, wherein the main component of the wax-like substance is a saturated chain hydrocarbon. And the weight ratio of carbon to hydrogen (C / H) is 5.839 to 6.018; the total weight percent of carbon and hydrogen is 98.5% to 100%;
Number average molecular weight (Mn) is 3.0 × 10 ^{3 to} 1.0 × 10
⁴ , and the weight average molecular weight (Mw) is 1.0 × 10 ⁴ to
5.0 a × 10 ^4, Ri <br/> Oh by Mw / Mn is 1.0 to 5.0, the wax-like substance, a synthetic resin waste is heated and melted, the thermal decomposition reaction with oxygen deficiency This is the configuration that is made.

As a result, there is an effect that a so-called easy-to-use marking material can be provided. In other words, the marking material, for example, paper and wood, stone, asphalt, concrete, metal, can write letters and pictures, lines and the like on various objects to be written, such as glass,
Moreover, the slip when writing is improved. Further, the marking material is harmless and moderately hard, so that the hands are not stained when held, and so-called discoloration does not occur. In addition, the marking material is a character or picture written on the object to be written,
Even if a line or the like is rubbed by another writing object or a hand or the like, it does not spread and become blurred, and does not spread even when wet with water. Therefore, the characters, pictures, lines, etc. written on the object to be written are
It is maintained in a state that is easy to see. Further, since the marking material is moderately hard, it is hard to be worn down and hardly broken when formed into a predetermined shape, so that it can be used for a long time and is economical. In addition, the marking material may be hot (eg, in summer)
Even when exposed to, in addition to exhibiting various effects that do not cause deformation and shape loss , the above-described marking material, a wax-like substance, for example, heat-melts synthetic resin waste such as polyethylene resin or polypropylene resin, Since it can be obtained by performing a thermal decomposition reaction in an oxygen-deficient state, there is an effect that it can be manufactured at low cost.

The marking material according to claim 2 of the present invention is
As described above, the entire shape is formed in a substantially wedge shape, the tip to be brought into contact with the writing object is formed flat, and the angle between the upper surface and the lower surface of the tip is 10
This is a configuration formed in {-30}.

Thus, the marking material can smoothly write characters, pictures, lines, and the like on the object to be written, and does not require much force when writing. In addition, the marking material gradually wears from the front end portion by writing, but the shape and angle of the front end portion are always kept almost constant. For this reason, the marking material has an effect that when writing a character, a picture, a line, or the like on the object to be written, the size of the character or the picture, or the thickness of the line, is easily adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a marking material according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing a use state of the marking material.

FIG. 3 is a schematic sectional view showing an example of an apparatus for producing a wax-like substance used for the marking material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Marking material 10a Upper surface 11b Lower surface 11 Tip part 12 Terminal part 20 Writing material

Claims (2)

(57) [Claims] 1. A marking material comprising a mixture of a waxy substance and a pigment, wherein the main component of the waxy substance is a saturated chain hydrocarbon, and the weight ratio (C / H) of carbon to hydrogen is 5%. .839-
6.018, and the total weight percent of carbon and hydrogen is 9
8.5% to 100%, the number average molecular weight (Mn) is 3.0 × 10 ^{3 to} 1.0 × 10 ⁴ , and the weight average molecular weight (Mw) is 1.0 × 10 ^{4 to} 5.0. × 10 ⁴
Mw / Mn is Ri der 1.0 to 5.0, marking material the wax-like substance, a synthetic resin waste is heated and melted, characterized by comprising by thermal decomposition at oxygen deficiency. 2. The whole shape is formed substantially in a wedge shape, a tip portion to be in contact with a writing object is formed flat, and an angle formed between an upper surface and a lower surface of the tip portion is: 10
2. The method according to claim 1, wherein the angle is formed in the range of {.about.30}.
Marking material described.