FI90515C - Plate-like product - Google Patents

Description

1 90515

The invention relates to a plate-like product having a substantially planar part and made of a lignocellulosic material. The invention relates in particular to fibreboard made of branded or dry process (MDF) and particle board made of dry process. In particular, the product in question can be used as a parquet board-10 board, for packaging purposes or for the protection of mytts floors.

It is previously known to use fibreboard as a parquet underlay. The spiky board is made of a porous fiberboard 15 by one-sided hot pressing, and both surfaces of this board are smooth, one hard and the other porous. The disadvantage of such a parquet base plate is that it does not compensate for the unevenness of the base, that it is relatively thick, that it does not allow ventilation of the base and said board 20 and that it requires two separate manufacturing steps, as a result of which it is relatively expensive. It is also known to use corrugated board as a base material for parquet, but its disadvantage is that it does not withstand moisture and that it often flattens already during the installation phase of the parquet, resulting in very poor ascetic insulation properties.

Fiberboard is myds known to make the so-called. embossed panels for decorative purposes such as seindpanee, etc. These panels are low embossed for the sole purpose of providing the desired decorative impression, for example a wooden arrangement.

Corrugated board is now very commonly used for packaging purposes, but its use is limited by its poor moisture resistance and poor strength.

The object of the invention is to provide a plate-like product.

2,90515, in particular a fibreboard, by which the drawbacks of the previously known, previously known solutions are disputed.

The object of the invention is, above all, to provide a plate-like product for use as a base of a parquet, which compensates for small irregularities in the base, which forms ventilation gaps between the base and said plate-like product, has good stepping and heat-insulating properties, is flexible and moisture-resistant.

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It is also an object of the invention to provide a sheet-like product for packaging purposes which can replace, for example, corrugated cardboard in heavier packages, which offers good protection against bumps and which has good moisture resistance.

These objects can be achieved by a plate-like product according to the present invention, the main features of which appear from the appended claims.

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The present invention is based on the realization that at least one surface of the planar portion of the plate-like product is formed with surface-shaped and protruding portions of the same surface as the planar portion and having a density substantially lower than that of the surrounding planar portion.

The sheet-like product according to the invention is preferably a fibreboard, but it can also be a particle board. The fiberboard may be hard or semi-hard in quality. The thickness of the planar portion of the fibreboard made by the markka method is typically about 2-12 mm. The thickness of the planar portion of the dry process board (MDF) is preferably about 2 to 30 mm, but may be up to 60 mm.

For said protrusions, the density is preferably at least 30% lower than the density of the surrounding planar portion and the height of the protruding portions is generally at least 30%, preferably 50-100% of the thickness of the planar portion. The peaks of the protruding parts are preferably at the same level. Said protruding parts may, for example, be circular, cylindrical, wavy, striped, rectangular or synchronous.

The sheet-like product according to the invention can be produced by hot-pressing uncompressed, uniform-density preforms / pulp sheets formed by a dry-method sprinkler (for making fibrous or particle boards) or a mark-method collector (for making fibreboards). The pressing can be performed in a planar press having a special mold plate against one or both surfaces of the plate to be manufactured, by means of which said ground-shaped and sized protrusions are formed on the plate to be pressed. As the mold plate, a metal plate can be used, the surface of which is pressed against the plate to be pressed into recesses of the desired shape and size and / or holes, the purpose of which is to provide a plate with a thickness substantially greater than the environment at said recesses and / or holes. and the density is substantially lower.

The shape of the recesses made in the mold plate and the depth 25 together with the thickness of the plate to be pressed can influence the resulting elastic and damping properties. For example, when the recess is made deep enough to its extent or a thicker mold plate is perforated, the fiber will become very porous when pressed on said recess or hole 30, and the outermost fibers will only partially adhere to the plate and thus form a fairly soft surface. / packaging items is preferred. When the mold recess is made low, smooth and bevelled, a completely smooth plate is obtained, e.g. shape 4 90515 gives a protective distance equal to its thickness. In addition, the properties can, of course, be influenced by how much of the surface area of the plate is left hard / porous.

The sheet-like product according to the invention is particularly suitable as a parquet underlay, for example in the form of a wet-method hardboard, in which case its thickness may be, for example, about 2.5 mm in its planar part and, for example, about 5 mm in the case of protrusions. For example, the protrusions may be bumps, which may be, for example, 1 cm in diameter and spaced, for example, 2 cm in diameter. When used as a base for parquet, the protrusions are placed downwards, whereby they flexibly compensate for some irregularities in the floor surface, act as step sound insulation, heat insulation (air space) and form a ventilation gap under the parquet. In addition, when the board is made so that the protrusions come up when the board is pressed, the wire pattern of the back surface of the wet hardboard, when a suitably sparse wire is used, forms a soundless board suitable for parquet.

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The sheet-like product according to the invention can also be attached at the factory as a structural part of the finished parquet.

Thicker than above (planar part e.g. 6-8 mm) • 25 boards can be used as a substrate for thinner / softer materials than myds parquet.

j For packaging purposes, the protrusions may be shaped e.g. strips on one or both sides of the plate, as well as strips in different directions, which make it easier to fold the sheets in the packages, thus streaking the strips.

The sheet-like products according to the invention can be coated on or after pressing with paper, for example creped paper, which is formed without tearing into various shapes and remains almost intact even when the sheet-like product is folded. The sheet product can also be coated with plastic or painted. In connection with the production of the sheet-like product I: 5 90515 according to the invention, a glass fiber mesh can be placed on its surface in addition to or instead of paper or plastic, for example to reinforce the product.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which Figure 1A shows a partial view of one plate according to the invention seen from the side, Fig. 3A shows a partial view of one third plate according to the invention in a side view, Fig. 3B shows the same plate as Fig. 3A in a side view, Fig. 4A shows a partial view of one of the fourth plates according to the invention; 4B shows the same plate as Fig. 4A when viewed from the top.

In Figs. 1A and 1B, a hard disk 25 made by the mark method is generally indicated by the reference numeral 1. The disk 1 has a planar portion 5, on the surface of which round bumps 9 are formed symmetrically over the entire disk surface by means of a mold plate. A wire pattern has formed on the lower surface of the plate 1 during manufacture.

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The board 1 is particularly well suited as a parquet base plate, in which case the board 1 is mounted on the base so that the bumps 9 come down and the wire pattern up. Thanks to the bumps 9, this plate 1 forms a good step and insulates 35. At the same time, a ventilation gap is formed under the parquet.

Slab 1 is also excellently suited for the protection of floors, for example in showrooms or construction sites. Tdlld's hard wire surface is not slippery, like a regular smooth hard drive, and in addition it is very durable. Soft nystyrdt 9 does not sand the surface to be protected, for example parquet. In addition, the disc is a flexible and pleasing 5 tdvd display tray.

Figures 2A and 2B show fibrous plates 2, the corrugated surface 6 of which has a corrugated protrusion 10 10 and 11, the length of which corresponds to the width of the plate, formed in the pressing step by means of mold plates. Tdtd disks 2 can be used, for example, for packaging purposes.

Figures 3A and 3B show a fibrous board 3, the upper surface of the planar part 7 of which has been formed in the pressing step by means of a mold plate 15 into a round bump 12, the upper surface of which is very soft. Correspondingly, elongate strip-like protrusions 13 are formed on the lower surface of the planar part 7 by means of a mold plate. This plate 3 is suitable for use, for example, for packaging purposes.

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Figs. 4A and 4B show a fibrous sheet 4, in the upper surface of the planar part 8 of which, in the pressing step, a molded protrusion 14 and elongate strip-like protrusions 15 are formed by means of a mold plate, which can be used to fold the sheet. Correspondingly, a strip-like protrusion formed at a 90 ° angle to the above-mentioned protrusions on the lower surface of the planar part 8 for the same purpose. Tdmd plate 4 is particularly well suited for packaging purposes. If you want to protect e.g. a pyiired piece, such as a large pipe, cable reel, etc., 30 it can be "kddrid" to the disk. The plate can be shaped according to the above-mentioned strips according to the part to be protected.

The plate presented above is now easy to protect from the corners and not just the flat surfaces in the packaging. The board is well suited for the production of 35 myOs packaging boxes.

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Claims (8)

7 90515 A sheet-like product (1-4) made of a lignocellulosic material, having a substantially planar portion (5-8) having at least one surface having shape and size portions (9-14) projecting from the surface plane 5, which are of the same material as the planar part and for which the density is substantially lower than the density of the surrounding planar part, for use as a parquet underlay or for packaging purposes. 10 Use according to Claim 1, characterized in that the product is a fibreboard. Use according to Claim 1 or 2, characterized in that the density of the projecting parts (9-14) is at least 30%, preferably 50-100% lower than the density of the planar part (5-8). Drive according to one of the preceding claims, characterized in that the height of the projecting parts (9-14) is at least 30% of the thickness of the planar part (5-8). Use according to Claim 4, characterized in that the peaks of the projecting parts (9-14) are at the same level. Use according to one of the preceding claims, characterized in that the second surface of the product has said and projecting parts (9) and that it is used as a base plate (3) for parquet. Use according to any one of claims 1 to 5, characterized in that one or both surfaces of the product (2, 3, 4) have said protruding parts (10-14) and that it is 3. used for packaging purposes. Use according to claim 7, characterized in that the product has one or more strip-like protruding parts (15) which facilitate its folding. 8 90515