JPH0573160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ignition material that facilitates ignition of fixed fuel.

Conventional technology and its problems Conventionally, solid fuels such as briquette solid fuels made by hardening coal, charcoal, coke, graphite, pulp, etc. with a binder require a long time to reach the combustion temperature, so paper or The fire was ignited using a fire starter such as a piece of wood.
However, paper and pieces of wood have low firepower, burn quickly, and burn out in a short period of time, resulting in poor ignition efficiency.

For this reason, impregnated paper impregnated with mineral oil is used in some cases, but there are problems such as the oil and fat evaporating and reducing the firepower, and the oil and fat adhering to hands and making them dirty.

One method has been proposed: a solid fuel or ignition material made by compressing and solidifying vegetable powder such as sawdust with paraffin, but since it is a lump of powder, it is brittle and difficult to handle, and it does not hold its shape. For this purpose, the density of the vegetable powder is increased and compressed, which has the disadvantage that there is an insufficient supply of air during combustion, which tends to generate smoke.

Another drawback is that a large amount of ash is generated on the surface of the ignition material during combustion, resulting in insufficient internal combustion.

Means for Solving the Problems In view of the above-mentioned problems, the inventors of the present invention aimed to extend the combustion time of the ignition material and increase the firepower to improve the ignition efficiency and reduce smoke generation. As a result of intensive research, we were able to create an ignition material that has high ignition efficiency and generates little smoke by impregnating a molded body made of entangled fibrillated vegetable fibers with a combustion agent.

That is, the gist of the present invention is that, inside a fibrous molded body having a fiber density of 0.2 to 0.4 g/cm ³ formed by intertwining fibrillated vegetable fibers, the air content inside the molded body is 0.02 to 0.4 g/cm 3 . It is an ignition material made by impregnating a solid paraffin or other heat-melting combustion material that is solid at room temperature to a concentration of 0.30cc/ ^cm3 .

The molded body of the vegetable fiber is, for example, made by fibrillating wood, bark, bamboo, etc., by defibrating it with a defibrator, dispersing it in water, and making it into paper using a wet papermaking method. Examples include plate-shaped molded bodies formed by intertwining vegetable fibers, and are molded so that the fiber density of vegetable fibers is as low as 0.2 to 0.4 g/cm ³ .

The fiber density was set to 0.2 to 0.4 g/ ^cm3 , which is 0.2 g/cm3.
If it is less than cm ³ , it will be brittle and difficult to maintain its shape, and the impregnated solid paraffin will flow out of the molded product during combustion and contaminate the surrounding area.
This is because if it exceeds 0.4 g/cm ³ , smoke is likely to be generated and ash is generated, preventing complete combustion to the inside of the ignition material.

The shape of the vegetable fiber molded body is rod-shaped, plate-shaped,
Examples include disc-shaped ones. When the shape of the vegetable fiber molded body is rod-shaped, the cross-sectional shape may be triangular, rectangular, circular, etc., and the cross-sectional shape is not limited, but the combustion time until the briquettes are ignited is maintained. In order to do this, it is best to use at least 4mm thick and 10cm long.

In addition, as a plate-shaped vegetable fiber molded body, for example, as shown in FIG. 1 or FIG. It may be provided and used as it is, or it may be used by cutting it off as appropriate, or it may be one in which a plurality of cutout grooves 2, 2 are alternately provided on both sides of a vegetable fiber molded board 1 having a rectangular plane as shown in FIG. .

Furthermore, as a disk-shaped vegetable fiber molded body,
As shown in FIG. 4, a vegetable fiber molded plate 1 having a circular planar shape and having a plurality of cutout grooves 2 radially provided therein is exemplified. Note that the cutout groove 2 functions not only as a ventilation groove but also as a separation groove.

The above molded body has an air content inside the molded body.
It is impregnated with a heat-melting combustion material that is solid at room temperature, such as solid paraffin, to a concentration of 0.02 to 0.30 cc/cm ³ .

When the igniting material burns, the air inside the molded body expands to exude combustion materials such as molten paraffin to the surface side, and ensures complete combustion inside the body. It is formed by being almost uniformly dispersed in the gap between the solid paraffin etc. solidified with vegetable fibers.

The air content is calculated by the difference between the total volume of the vegetable fibers and combustion agent and the total volume of the ignition agent. If this air amount is less than 0.02cc/ ^cm3 , the combustion agent is Since the voids between the fibers are completely crushed and the air supply is obstructed, internal combustion ^slows down and the firepower decreases. There is a problem that smoke is generated from the quality fibers.

As for the above-mentioned combustion agent, solid paraffin is generally easy to use due to its combustibility, but wax,
It may be a fat or the like, and these may be mixed with a combustion aid such as a stearate.

Examples of solid paraffin include aliphatic saturated hydrocarbons having 16 to 45 carbon atoms. Waxes include those consisting of esters of aliphatic and water-insoluble higher monohydric alcohols or dihydric alcohols, and depending on the source, there are vegetable waxes, animal waxes, and petroleum waxes. Furthermore, examples of the fat include those whose main component is an ester of fatty acid and glycerin.

In order to impregnate and solidify the vegetable fiber molded body with this combustion agent, for example, the vegetable fiber may be immersed in the heat-molten nonvolatile combustion agent to impregnate it, and then taken out, cooled, and solidified. .

In particular, when the non-volatile combustion agent is solid paraffin, the impregnated amount is 0.4 to 0.6 g/cm ³ , preferably the porosity of the vegetable fiber molded body is 2 to 10
%.

Example Fiber density: 0.25 g/cm ³ , thickness: wood fibers made from wood fibers made by fibrillating wood chips
A 4.5 mm vegetable fiberboard was cut into strips every 4.5 mm in width to obtain a rod-shaped molded body approximately 162 mm in length, and then,
This is immersed in heat-molten paraffin (160°C to 180°C) for about 30 seconds to impregnate it with 0.6 g/cm ³ of paraffin, and then taken out and cooled and solidified to achieve a porosity of about 3% and specific gravity. A rod-shaped ignition material of 0.9 was obtained.

When the ignition material of this example was ignited with a pine and observed, the combustion time from ignition to burnout was approximately 5 minutes, the flame height was sustained at 35 mm, and no smoke was observed. Then, when four samples according to the above example were lined up below the briquettes and ignited, it was confirmed that the briquettes were completely ignited.

Furthermore, the ignition material after combustion was completely combusted and only a small amount of white ash remained, confirming that it was completely combusted even in the narrow space below the briquettes.

Furthermore, although the ignition material was thin, measuring 4.5 mm square, it did not break under impact, and had excellent strength so that it would not be damaged during handling or transportation.

Comparative Example 50 parts by weight of sawdust and 50 parts by weight of solid paraffin were mixed and heated and compressed to produce a 50 mm square rod-shaped ignition material, which was placed under charcoal briquettes and ignited in the same manner as in the example. Within seconds, smoke is generated and molten paraffin flows out under the ignition material, weakening the firepower.
The combustion of the igniting material ended in 3 minutes, and the briquettes were only partially ignited.

Further, the above-mentioned ignition material was difficult to handle because it broke into small pieces with the slightest impact.

The reason why the igniting material of the example has a longer burning time and stable firepower than the igniting material of the comparative example is that when ignited with a pine etc., the combustible material impregnated inside the vegetable fiber molded body and solidified is released on the surface. As the flame spreads smoothly over the surface, the air existing in the voids of the molded vegetable fiber expands, so the combustion material inside the molded vegetable fiber melts and gradually seeps out to the surface. This is thought to be because it burns together with the vegetable fibers located on the surface.

In addition, in this example, the case where solid combustion is ignited was explained, but it is not necessarily limited to this.
Gather a book or 10 fire starters together, or
If it is made to have a large cross section and ignited, it can be used to heat water at campsites, etc.

Effects of the Invention As is clear from the above explanation, the ignition material according to the present invention has a long combustion time and strong firepower. Can be ignited reliably and has good ignition efficiency.

Moreover, even if the combustion agent is impregnated into the molded vegetable fiber, a suitable amount of voids remain, so there is no shortage of oxygen and no smoke is produced.

[Brief explanation of the drawing]

1 to 4 are perspective views showing embodiments of the present invention. 1... Vegetable fiber molded board.

Claims (1)

[Claims] 1 Inside a fibrous molded body with a fiber density of 0.2 to 0.4 g/cm ³ formed by intertwining fibrillated vegetable fibers, the air content inside the molded body is
An ignition material impregnated with a combustion agent that is solid at room temperature, such as solid paraffin, to a concentration of 0.02 to 0.30cc/ ^cm3 .