JP2015189876A - solid fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid fuel which can make early heating power strong, and can reduce a quantity of the solid fuel necessary to achieve appointed objectives such as cooking or heating.SOLUTION: A solid fuel comprises a pillar-like main body of solid fuel containing solids mainly based on alcohol, and an incombustible sheath material wrapping the solid fuel main body to cover part of the peripheral side face and the bottom face of the solid fuel main body. The cross sectional area of the solid fuel in the cross section parallel to the bottom face is 5-30 cm, the sheath material is provided at a fixed height on the entire peripheral side face of the solid fuel, and a ratio of the height of the sheath material to the height of the solid fuel is 25-75%.

Description

The present invention relates to a solid fuel.

As a fuel for heating cooked dishes and the like, a solid fuel in which a solid fuel main body sealed with a cylindrical or prismatic resin film is packaged with an exterior material is known.

FIG. 4 is a side view schematically showing the solid fuel described in Patent Document 1. As shown in FIG.
A solid fuel 100 shown in FIG. 4 includes a solid fuel main body 101 that is cut into pieces from a solid fuel molded body containing alcohol as a main component, a resin film 102 that is substantially hermetically packaged, and a thermal adhesive layer on the inner surface. It is formed by squeezing and wrapping by forming a wrinkle 106 so that it is bonded to the resin film 102 and thermally bonded, and the upper portion of the aluminum foil 103 is opened, and the solid fuel body 101 is packaged. On the entire peripheral side surface of the resin film 102, the exterior aluminum foil 103 is bonded with the edges of the crests 104 and the troughs 105, and the air contact surface is increased.

Japanese Patent No. 4256030

The solid fuel 100 described in Patent Document 1 is configured such that the exterior aluminum foil 103 disposed around is bonded with the edges of the crests 104 and the troughs 105 to increase the air contact surface. Has been. However, the ratio of the surface area covered by the exterior aluminum foil 103 to the surface area of the entire peripheral side surface is large, and in the case of a light weight solid fuel, the solid fuel covers the periphery of the small volume, When the combustion area is small and the combustible component is difficult to be supplied, especially in the mountain portion 104, the exterior aluminum foil covers a large proportion of the surface area of the entire peripheral side surface, so that a strong thermal power is required in the initial stage. In addition, there is a problem that it is difficult to satisfy the requirements sufficiently.

The present invention has been made to solve the above-mentioned problems of the conventional solid fuel, can increase the initial heating power, and is necessary for achieving predetermined purposes such as cooking and heat retention. An object of the present invention is to provide a solid fuel capable of reducing the amount of the solid fuel.

In order to achieve the above object, the solid fuel of the present invention includes a solid fuel body having a columnar shape containing a solid substance mainly composed of alcohol, and a solid fuel body so as to cover a part of the peripheral side surface and the bottom surface of the solid fuel body. A solid fuel comprising a flame retardant outer packaging material in which a fuel body is packaged, wherein the solid fuel has a cross-sectional area of 5 to 30 cm ² in a cross section parallel to the bottom surface thereof, The exterior material having the same height is provided, and the ratio of the height of the exterior material to the height of the solid fuel is 25 to 75%.

The solid fuel of the present invention is configured as described above, and since the ratio of the surface area where the solid fuel is exposed to the air is large, the cross-sectional area in a cross section parallel to the bottom surface is 5 to 30 cm ² . Even if the value is small and light solid fuel, the initial thermal power becomes strong.
If the cross-sectional area in the cross section parallel to the bottom surface is less than 5 cm ² , the height must be increased in order to ensure a predetermined weight, which becomes unstable when installed. Then, since it is too lightweight, combustion time is short and it becomes difficult to achieve predetermined purposes, such as cooking and heat retention. On the other hand, if the cross-sectional area in the cross section parallel to the bottom surface exceeds 30 cm ² , the combustion time becomes too long because the weight is too heavy when the solid fuel is brought to a normal height. On the other hand, when the height is lowered, the shape becomes flat and difficult to use as a solid fuel.

If the ratio of the height of the outer packaging material to the height of the solid fuel is less than 25%, the height of the outer packaging material is too low, and it becomes difficult to adhere the outer packaging material to the peripheral side surface of the solid fuel, and the outer packaging material peels off. It becomes easy. On the other hand, if the ratio of the height of the outer packaging material to the height of the solid fuel exceeds 75%, the ratio of the aluminum foil for the outer sheath covering the surface area of the entire peripheral surface is too large. The area becomes narrow, the combustible component is not sufficiently supplied, and the initial thermal power is weakened.

In the solid fuel of the present invention, the cross-sectional shape in a cross section parallel to the bottom surface of the solid fuel is preferably a circle, an ellipse, a racetrack shape, or a polygon.
This is because when the cross-sectional shape is a circle, an ellipse, a racetrack shape, or a polygon, the shape is relatively simple, can be manufactured relatively easily, and can be mass-produced.

In the solid fuel of the present invention, the weight of the solid fuel is preferably 3 to 50 g.
This is because the solid fuel of the present invention can exert an effect that the initial heating power is strong when the weight within the above range is used.
From the viewpoint of reducing the amount of solid fuel and increasing the initial heating power, the weight of the solid fuel is more preferably 3 to 40 g, and further preferably 5 to 30 g.

In the solid fuel of the present invention, since the area where the solid fuel is exposed in the air is large, the cross-sectional area in the cross section parallel to the bottom surface is 5 to 30 cm ² and the cross-sectional area is small, even if it is a lightweight solid fuel, Increases initial firepower.

FIG. 1 is a perspective view schematically showing an example of a cylindrical solid fuel according to the first embodiment. FIG. 2 is a perspective view schematically showing an example of an elliptic cylinder-shaped solid fuel according to the second embodiment. FIG. 2 is a perspective view schematically showing an example of a quadrangular prism-shaped solid fuel according to the third embodiment. FIG. 4 is a side view schematically showing a conventional solid fuel described in Patent Document 1. As shown in FIG.

Hereinafter, the solid fuel and the manufacturing method thereof according to the present invention will be described with reference to specific embodiments, but the present invention is not limited to these embodiments.

The solid fuel of the present invention includes a solid fuel main body of a columnar body containing a solid mainly composed of alcohol,
A solid fuel comprising a flame retardant exterior material that covers the solid fuel body so as to cover a part of the peripheral side surface and the bottom surface of the solid fuel body, and the solid fuel is in a cross section parallel to the bottom surface. The cross-sectional area is 5 to 30 cm ² , the exterior material having the same height is provided on the entire circumferential side surface of the solid fuel, and the ratio of the height of the exterior material to the height of the solid fuel is 25 to 25 cm 2. 75%.

(First embodiment)
FIG. 1 is a perspective view schematically showing an example of a columnar solid fuel according to the first embodiment.
The solid fuel main body 11 constituting the solid fuel 10 shown in FIG. 1 has a cylindrical shape, and a flame-retardant exterior in which the solid fuel main body 11 is packaged so as to cover a part of the peripheral side surface 11a and the bottom surface 11b of the solid fuel main body 11. A material (aluminum foil) 12 is provided.

The height _{H 12} of the outer package 12 covering the peripheral surface 11a of the solid fuel body 11 is constant, the percentage of the ratio of the height _{H 12} of the outer package 12 to the height _{H 11} of the solid fuel body 11 (hereinafter, the peripheral side surface The coating ratio is expressed by the following formula (1).
Peripheral side surface covering ratio R ₁ (%) = (H ₁₂ / H ₁₁ ) × 100 (1)

The peripheral side surface covering ratio _{R 1} is desirably 25 to 75%, more, and more desirably 35 to 70%.
Since the peripheral side surface covering ratio R ₁ is in the above range, on combustion, the combustible component is sufficiently supplied, the initial heating power becomes stronger.

When the peripheral side surface covering ratio R ₁ is less than 25%, since the height of the outer package 12 is too low, it becomes difficult to adhere the outer material on the peripheral side surface, the exterior material 12 is easily peeling during handling. On the other hand, the peripheral side surface covering ratio R ₁ is more than 75%, the proportion of the exterior material 12 covers of the surface area of the entire peripheral side surface is too large, the initial thermal power becomes weak.

A cross-sectional area S ₁ (hereinafter simply referred to as a cross-sectional area) in a cross section parallel to the bottom surface 11b of the solid fuel main body 11 is expressed by the following expression (2) because the radius of a circle constituting the cross section is D ₁ .
Cross-sectional area S ₁ (cm ² ) = πD ₁ ² (2)

The cross-sectional area S ₁ represented by the formula (2) is 5 to 30 cm ² , and the solid fuel body 11 having such a cross-sectional area is lightweight but has a strong initial thermal power.
In such a solid fuel, the height is desirably 7 to 40 mm.

Hereinafter, members and the like constituting the solid fuel 10 of the present embodiment will be described.
The solid fuel body 11 constituting the solid fuel 10 is preferably sealed with a resin film (not shown). When the solid fuel body 11 is sealed with a resin film, evaporation of the fuel component of the solid fuel body 11 can be prevented.

The type of the resin film is not particularly limited as long as it is a film made of a combustible and non-breathable material. However, it is preferable that the material does not leave a combustion residue after combustion. Examples of the material for the film include polypropylene and polyethylene.

The weight of the solid fuel body 11 is not particularly limited, and may be appropriately set according to the purpose of use. If it is used for heat retention and heating of cooked food, it is preferably 3 to 50 g, more preferably 3 to 40 g, and further preferably 5 to 30 g.
In order to reduce the amount of the solid fuel body 11 as much as possible and keep the initial heating power strong, the above-described weight is desirable.

The solid fuel main body 11 is a solid substance containing alcohol as a main component. Usually, in order to make alcohol, which is a liquid, into a solid, the alcohol is contained in soaps or cellulose acetate to form a gel-like solid body. And Therefore, the component structure of the solid fuel main body 11 may include components such as soaps or cellulose acetate in addition to alcohol, and may also include various additive components.

The flame retardant exterior material is a sheet material made of a flame retardant material.
The flame retardant exterior material is preferably a metal foil such as copper, stainless steel, and aluminum, more preferably an aluminum foil, from the viewpoint of fire resistance, workability, shape retention, and the like. Moreover, you may use a flame retardant resin film and a flame retardant paper as a flame retardant. In this embodiment, aluminum foil is used.

When this solid fuel 10 is burned, the solid fuel 10 is installed inside the tray and ignited to burn. The solid fuel having such a shape is suitable for keeping warm such as hot pot food that has already been cooked.

Hereinafter, the manufacturing method of the solid fuel of this embodiment is demonstrated.
The solid fuel 10 is obtained by sealing the solid fuel body 11 with a resin film (not shown).

The solid fuel main body 11 is produced by forming a massive solid fuel molded body into a predetermined shape (cylindrical shape) by cutting or the like.
Next, the solid fuel body 11 is sealed with a resin film. The method of sealing the solid fuel main body 11 with the resin film is not particularly limited.For example, after the solid fuel main body 11 is packaged with the resin film, the peripheral end of the resin film is heat-sealed so that there is no gap, Can be sealed.

Subsequently, the exterior material 12 is produced.
The exterior material is created by cutting out a flame retardant sheet, which is a sheet material made of a flame retardant material, by punching or the like. In the present embodiment, the solid fuel has a cylindrical shape, and the shape of the exterior material 12 is circular. However, when the cross-sectional shape in a cross section parallel to the bottom surface of the solid fuel is a race track shape, It may be punched into a racetrack shape using a punching blade, or after punching out with a circular punching blade, a straight portion may be cut at two places using a cutter or scissors to form a racetrack shape.

By placing the solid fuel body 11 packaged with a resin film on the exterior material 12 obtained in this way, and squeezing the exterior material 12 from the bottom surface 11b of the solid fuel body 11 to wrap the solid fuel body 11, The outer packaging material 12 is wrapped so as to cover a part of the peripheral side surface 11a and the bottom surface 11b of the solid fuel body 11, and an adhesive is applied to the outer packaging material 12 covering the peripheral side surface 11a. The solid fuel 10 is obtained by bonding to the resin film. A hot melt adhesive can be used as the adhesive.

Examples that more specifically describe the present invention are shown below, but the present invention is not limited to these examples.

(Example 1)
First, the solid fuel main body 11 was produced by forming a massive solid fuel molded body into a predetermined shape (cylindrical shape) by cutting or the like.
Next, after the solid fuel main body 11 was packaged with a resin film, the peripheral end of the resin film was heat-sealed so that there was no gap, and was sealed.

Subsequently, a circular aluminum foil 12 is obtained as an exterior material by punching the aluminum foil, the solid fuel main body 11 is placed on the aluminum foil 12, and the aluminum foil 12 is removed from the bottom surface 11b of the solid fuel main body 11. By squeezing and wrapping the solid fuel main body 11, it is wrapped with aluminum foil 12 so as to cover a part of the peripheral side surface 11a and the bottom surface 11b of the solid fuel main body 11, and hot melt adhesive is applied to the aluminum foil 12 covering the peripheral side surface 11a. The solid fuel 10 was manufactured by applying and bonding the exterior material 12 to the peripheral side surface 11a (resin film on the peripheral side surface).
Weight (g), outer diameter (2D ₁ ), height (H ₁₁ ), peripheral side surface covering ratio R ₁ (H ₁₂ / H ₁₁ (%)), cross-sectional area S ₁ (cm ² ) of the solid fuel body 11 Are shown in Table 1, Table 2, and Table 3.

Next, the obtained solid fuel 10 was placed in a stove, ignited, and the combustion time (T: seconds) was measured. At the same time, the weight loss due to combustion was measured every minute, and the weight loss (Wt: g) from 1 minute to 3 minutes after ignition was measured as the initial heating power. The results are also shown in Table 1, Table 2 and Table 3.

In Tables 1, 2 and 3, the combustion time ratio is the ratio (%) of the examples when the combustion time of Comparative Examples 1 to 3 described in Tables 1 to 3 is 100%. Similarly, the initial thermal power ratio is the ratio (%) of the examples when the initial thermal power of Comparative Examples 1 to 3 described in Tables 1 to 3 is 100%.

(Examples 2-9)
Weight (g), outer diameter (2D ₁ ), height (H ₁₁ ), peripheral side surface covering ratio R ₁ (H ₁₂ / H ₁₁ (%)), and cross-sectional area S ₁ (cm ² ) of the solid fuel main body 11 Except for changing to the values shown in Tables 1 to 3, a solid fuel 10 was produced in the same manner as in Example 1, and the combustion time (T: seconds) and the initial heating power (Wt: g) were measured.

(Comparative Examples 1-3)
Weight (g), outer diameter (2D ₁ ), height (H ₁ ), peripheral side surface covering ratio R ₁ (H ₁₂ / H ₁₁ (%)), and cross-sectional area S ₁ (cm ² ) of the solid fuel body 11 Except for changing to the values shown in Tables 1 to 3, a solid fuel 10 was produced in the same manner as in Example 1, and the combustion time (T: seconds) and the initial heating power (Wt: g) were measured.

In Table 1 (solid fuel 7 g), with respect to the peripheral side surface coating ratio, Comparative Example 1 was set to 96%, while Examples 1 to 3 were changed to 74%, 50%, and 31%, respectively. At that time, the combustion time ratio is 86%, 72%, and 65% in Examples 1 to 3, respectively, and the reciprocals thereof are 116%, 139%, and 153%. In addition, the initial thermal power ratio is 114%, 132%, and 139%, which is close to a proportional relationship with the inverse of the combustion time ratio. From the above results, it was found that in Examples 1 to 3 in which the peripheral side surface covering ratio is in the range of 25 to 75%, the initial heating power can be increased by 10% or more compared to Comparative Example 1.
In Table 2 (solid fuel about 25 g) and Table 3 (solid fuel about 40 g), the same effect as above could be confirmed.

(Second embodiment)
In the first embodiment, the case where the cross-sectional shape of the solid fuel main body is a circle has been described. However, the cross-sectional shape of the solid fuel main body is not limited to the shape described in the first embodiment, and is an ellipse or a polygon. Also good. Hereinafter, a solid fuel having a shape different from that of the solid fuel according to the first embodiment will be described.

FIG. 2 is a perspective view showing a solid fuel main body constituting the solid fuel according to the second embodiment.

The solid fuel according to the second embodiment may be a solid fuel 20 including a solid fuel body 21 having an elliptical cross section as shown in FIG.
The solid fuel main body 21 constituting the solid fuel 20 shown in FIG. 2 has an elliptic cylinder shape, and is a flame-retardant material in which the solid fuel main body 11 is packaged so as to cover a part of the peripheral side surface 21a and the bottom surface 21b of the solid fuel main body 21. An exterior material (aluminum foil) 22 is provided.

The height H ₂₂ of the outer covering material 22 covering the peripheral side surface 21 a of the solid fuel main body 21 is constant, and the percentage of the ratio of the height H ₂₂ of the outer covering material 12 to the height H ₂₁ of the solid fuel main body 11 (peripheral side surface covering ratio). R ₂ ) is represented by the following formula (3).
Peripheral side surface covering ratio R ₂ (%) = (H ₂₂ / H ₂₁ ) × 100 (3)
Peripheral side surface covering ratio _{R 2} is 25 to 75%.

The cross-sectional area S ₂ (hereinafter, simply referred to as a cross-sectional area) in a cross section parallel to the bottom surface 21b of the solid fuel main body 21 is as follows. The major axis of the ellipse constituting the cross section is D ₂₁ and the minor axis is D _22. 4)
Cross-sectional area S ₂ (cm ² ) = πD ₂₁ × D ₂₂ (4)
The cross-sectional area S ₂ represented by the formula (4) is 5 to 30 cm ² , and the solid fuel body 21 having such a cross-sectional area and the peripheral side surface covering ratio R ₂ is lightweight but has a strong initial thermal power. .

Since the characteristics of the members (resin film, solid fuel body, exterior material, etc.) constituting the solid fuel according to the second embodiment are the same as those of the first embodiment, the description thereof is omitted here.

The solid fuel according to the second embodiment may have a racetrack shape in cross section or another shape similar to another ellipse.

(Third embodiment)
FIG. 3 is a perspective view showing a solid fuel main body constituting the solid fuel according to the third embodiment.

The solid fuel according to the third embodiment may be a solid fuel 30 including a solid fuel body 31 having a square cross section as shown in FIG.
The solid fuel main body 31 constituting the solid fuel 30 shown in FIG. 3 has a quadrangular prism shape, and is a flame-retardant material in which the solid fuel main body 31 is packaged so as to cover a part of the peripheral side surface 31a and the bottom surface 31b of the solid fuel main body 31. An exterior material (aluminum foil) 32 is provided.

The height H ₃₂ of the exterior material 32 covering the peripheral side surface 31a of the solid fuel body 31 is constant, and the percentage of the ratio of the height H ₃₂ of the exterior material 32 to the height H ₃₁ of the solid fuel body 11 is the following ( 5) It is expressed by the formula.
Peripheral side surface covering ratio R ₃ (%) = (H ₃₂ / H ₃₁ ) × 100 (5)
Peripheral side surface covering ratio _{R 3} is 25 to 75%.

Sectional area S ₃ in the cross section parallel to the bottom surface 31b of the solid fuel body 31, the length of one side of the square constituting the cross-section is a D _3, the (6) below.
Cross-sectional area S ₃ (cm ² ) = D ₃ ² (6)
The cross-sectional area S ₃ represented by the formula (6) is 5 to 30 cm ² , and the solid fuel main body 31 having such a cross-sectional area and the peripheral side surface covering ratio R ₃ is lightweight but has a strong initial thermal power. .

The solid fuel according to the third embodiment may have a rectangular cross-sectional shape, or may be a parallelogram, pentagon, or hexagon.

10, 20, 30 Solid fuel 11, 21, 31 Solid fuel body 11a, 21a, 31a Peripheral side surface 11b, 21b, 31b Bottom surface 12, 22, 32 Exterior material

Claims (3)

A solid fuel body in a columnar shape containing solids mainly composed of alcohol;
A solid fuel comprising a flame retardant exterior material packaging the solid fuel body so as to cover a part of the peripheral side surface and the bottom surface of the solid fuel body,
The solid fuel has a cross-sectional area of 5 to 30 cm ² in a cross section parallel to the bottom surface thereof,
The exterior material of the same height is provided on the entire circumferential side surface of the solid fuel,
The ratio of the height of the exterior material to the height of the solid fuel is 25 to 75%. The solid fuel according to claim 1, wherein a cross-sectional shape in a cross section parallel to the bottom surface of the solid fuel is a circle, an ellipse, a racetrack shape, or a polygon. The solid fuel according to claim 1, wherein a weight of the solid fuel is 3 to 50 g.

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