DE2361119A1 - METHOD OF TREATMENT OF WOOD - Google Patents

Description

Method of treating wood

The invention relates to a method for treating wood products, either for incineration or for further use. Wood products for lighting or as fuel are generally made from pressed sawdust or charcoal into Most of the time they are made with some hydrocarbons to support the combustion, such products are so far, however, not entirely satisfactory. Charcoal is obtained from the charring furnace, whereupon the obtained charcoal pulverized and briquetted. These charcoal briquettes are therefore industrially manufactured products. they are grainy and have voids and pores after briquetting. These can then be soaked in a liquid. Sawdust, even if "they become a block with a petroleum product are pressed burn off very quickly and leave a substantial residue, often associated with a considerable odor of petroleum.

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The invention "now relates to the treatment of Ha turh.pl ζ (im As opposed to sawdust, blocks and charcoal briquettes) in order to allow both its combustion properties and the finished product Improve appearance. According to the method according to the invention, saturation is achieved through essentially the whole body, with a petroleum product such as paraffin aimed to make it the one hand to make it easily flammable and on the other hand to improve the appearance.

The products obtained according to the invention have provisions for rapid ignition and leave very little ash. According to the method according to the invention, the wooden objects essentially completely saturated with a petroleum product, like paraffin. This is done by first bringing the wood product to a sufficient level in a bath of liquid petroleum product Temperature warmed to displace all moisture and gases from the pores, causing the wood products to either can cool in the same or in a different bath of liquid petroleum hydrocarbon products, whereby the Liquid is soaked up in the pores until the substantially complete saturation achieved through the entire thickness of the material

^is-fc * becomes

The wood products, when they are lit, for example as a fire lighter, can be wrapped and have ignition strips on opposite sides for ignition and complete To make burning the block easier.

The invention is further illustrated by the accompanying figures:

Figure 1 is a schematic side view of the device for Implementation of the method according to the invention, in which the wood products are immersed in the corresponding baths.

FIG. 2 shows, in perspective, with some parts removed, a Firelighters obtained according to the invention.

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a
Figure 3 shows. Cross-section along 3--3 of Figure 2. '

Figure 4 shows a cross section with the ignition strip. Figure 5 shows a perspective view of a fire lighter of a different shape and finally

Figure 6 shows a perspective view of an invention ■ according to manufactured wood-based material

The method according to the invention can be applied to wood products, which are cut from the green tree in appropriate lengths and on debarked wood or such left entirely Or split or sawn, ever according to the type of wood product to be manufactured. An example of such a blank is a 25 x 25 x 406 mm. It can, however larger pieces can also be used.

Natural wood contains pores that run through the whole body of the wood extend and are originally filled with moisture or gases, often also with waxes. These have to be removed first whereupon you burn the pores with a Liquid can fill. . . ■

According to this method, the wooden parts are first placed in a container 1 (FIG. 1) which contains a liquid petroleum product 2, such as petrolatum or paraffin. Any highly flammable hydrocarbon can be used for this purpose. Even inferior paraffins ode'r crude oils that do not evaporate at or below '.Approximately 130 ⁰ C »The vessel contents are heated to a temperature between 140 ° and 180 ⁰ C with a usual burner 3". The temperature should be sufficient to drive away moisture and gases within the wood and fluctuates somewhat with the size of the wood. For example, wooden objects with a size of 25 χ 25 χ 406 or 50 χ 12.7 x.4O6 mm can be cooked in the bath -2 for about 3 hours to remove all the moisture and gases and solids that are partially present during the process , changed, remove. This boiling process only expels the gases and vapors. There is no penetration yet

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of paraffin or other petroleum products into the pores of the wood, This boiling is sufficient to remove all of these substances from the pores and leaves the pores essentially open through the whole wooden body back.

After this cooking process in the bath 2, the wood product is either in the same or in a different bath in the presence of paraffin or another petroleum product, to about 70 to 75 ° C cooled, whereby the hydrocarbon and the pores penetrate in the whole thickness of the material.

According to Figure 1, there are expediently the wood products in a container 4 for immersion in the bath 2, with the help of which immersion and extraction from the bath 2 and transferring into the cooling bath 5 within the 2nd container 6 is possible. this happens by a conventional trolley or the like. To set the temperature between 70 and 7 ^ C of the bath 5 is used the burner 7-

These measures result in an effective degassing of the wood and a change in the physical properties of the wood fibers by removing the solid residues including the hemicellulose. The degassing along with the change of the hemicellulose and their binding properties leads to an opening of cavities in the wood, which can now be filled by the molten paraffin or other petroleum products. The changes in physical properties are such that even the pressure of a fingernail along the grain shows this change in properties. In addition, the cavities thus formed are permanent.

According to the method of the invention can be both hardwood as. also treat softwood such as pine or oak. The wooden objects can be debarked or sawn to size or split, depending on what they are to be used for.

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Figure 5 shows a split piece 8, a part of which has crawled away is to show off the natural wood grain. Such pieces of wood are useful for various purposes such as railroad tracks and as long blocks. Another shape than a wood product 9, is shown in FIG. In this case it is a sawn piece. The natural grain is preserved. It is used either for incineration or for further processing. the As mentioned above, the grain is changed by the cooking process.

Another form of igniter is shown in FIGS. The wood product 10 is treated as above to absorb paraffin or other hydrocarbons through the wood pores, then wrapped in a cover material 11, such as wax paper, which encloses the entire area of the wood.

If a wax paper is used for the wrapping, it will ignite the wood if it has been ignited. To the opposite Pages of the wood product on the cladding 11 can be Attach ignition strips 12, whereby not only the paper wrapping, but also the wood itself is more easily ignited. The outer ends of these ignition strips 12 can be bent over and fixed at the ends of the wrapped wood, as shown in Figure 2 on the right. These end parts can then be pushed back, as shown on the left in FIG. 2, in order to ignite the product.

Each ignition strip 12 is preferably composed of one Paper strips 13 with a base 14 made of paraffin with which the paper strip 13 is held on the edges of the wrapped wood will. The paper layer 14 is located between strips of paper 13 and casing 11 .. A product according to Figure 2 is permitted the burning of a single block after ignition with a single one Match, which you can't do with the well-known products.

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The ignition sticks, as shown in Figures 2 and 3, are used to start a fire on a block or around a pile Charcoal placed in household grills. V / enn

paraffin was used according to the invention, which is essentially non-volatile, so the whole burns odorless, it does not bleed and can be soaked up in a paper container, in which these pieces are stored. In addition, these fuses burn slowly, so they are no danger to represent the person handling it. Once such a piece is lit, it burns until it has a minimal ash content * remains, regardless of whether it is pine or oak. You can only use one control point

one
Burn a single piece of wood treated according to the invention. This burns for a long time and for medium-sized ones it takes up to two hours for complete combustion.

The woods treated according to the invention can, however, also be used as such due to the improved properties, for. Example as fence wood, cart bodies, tool handles, furniture, Table tops, floors or the like. By the invention This process gives the wood a very waxy surface texture. Hardwood treated according to the invention in particular can be used in a wide variety of ways.

If you want to create further variations in the appearance of natural woods, so you can add appropriate dyes or pigments to the paraffin bath, which are absorbed by the wood.

Claims

409824 / Ü868

Claims (2)

Claims ή. Method for treating wood, thereby g e k e η η ζ e i c h. η e t that you can put a wood in a hydrocarbon bath immersed, it is heated to a sufficient temperature to volatilize the moisture and to open pores and cavities, whereupon one is in the presence of the hot hydrocarbon the wood product cools down. 2. The method according to claim 1, characterized in that the bath is heated to HO ⁰ C up to the boiling point of the hydrocarbon, in particular in the case of paraffin to 14-0 to 18Q ⁰ G. 8143 40981 ^ 0868