Production of boards and board thus made

FIELD: process engineering.

SUBSTANCE: invention relates to production of construction boards with wood core. Proposed method comprises the steps that follow. 1) Sputter of wood fibers or ships coated with glue to make chipboard. 2) Compaction of said chipboard at high temperature to make large-size board with shagreen layer at, at least, its top surface. 3) Application of primer of melamine-based liquid resin on board surface to be coated. Note here that said resin penetrates, at least partially, into board surface layer to impregnate said shagreen and improve its properties. 4) Primer draying and 5) application of primer on the pad. 6) Primer drying and 7) application of at least one varnish saturated with painting water-based pigments to create the pattern. 8) Pattern drying and 9) application of sealing layer saturated with wear-resistant particles and resin cellulose melamine-based fibres. 10) Sealing drying and 11) application of liquid resin pad on board bottom layer. Note here that said resin penetrates, at least partially, into board bottom surface layer. 12) Pad drying and 13) application of stabilizing layer on said bottom surface. 14) Compaction of sandwiched structure by high temperature and pressure and 15) separation to panels of required width and length. 16) Application of bonding means and fixing elements on opposite lateral edges for flue-free joint and fixation of several panels to the floor floating structure.

EFFECT: wear-resistant laminar panels.

16 cl, 1 dwg

 

The invention relates to a method of manufacturing panels which are cut from a large subject to cover plate with a core of wood material. From EP 1 454 763 A2 a method of processing wood or chipboard, first of all fiber plates medium (MDF) and high (HDF) density from the top side and the bottom side, first on the upper side of the plate is applied to the sealing layer of melamine resin, the sealing layer is applied to the pattern and then the pattern is applied a protective layer of melamine resin. Then the design of the plate is pressed under the influence of temperature up until the protective layer and the sealing layer is not fused and will not connect to each other through between a printed pattern.

In DE 195 32 819 A1 discloses a method of manufacturing chipboards with allowing optical design surface, in which wood-shaving plate to each other are applied primer paint, the sealing layer, the basis of the print and the printed pattern. Thus the basis for printing consists of priming paint or primer, lacquer sealing layer and the surface of the lacquer. Using the engraving cylinder on the basis of the print may be applied to the printed image, for example, by the method of two-color printing. In conclusion, this seal can be the ü applied in several layers of acrylic lacquer, curing by means of UV radiation.

DE 197 51 115 A1 discloses a method of applying a panel cover, which on the surface using the printing method, primarily silk, apply at least one coat of paint. The surface can be raw, polished or pre-prepared primarily covered with varnish. Finally a layer of paint can be covered with a transparent varnish.

With direct printing, that is, direct printing of the individual layers to be coated plate, due to the lack of paper layers, the result is a reduction in the thickness of the finished laminated panels compared to the standard way manufactured panels. This leads to problems in the mass production if large plates coated then cut for the manufacture of panels. To ensure that the individual panels correspond to the minimum value of the thickness according to DIN 13329 should ensure strict quality control, which, on the one hand, slows down the production process, and on the other hand, increases the cost of manufacture. In the end, it also causes irritation trade agents and/or end user, as the height of the stack of plates with direct coating significantly about the while in the mind from the height of the stack of plates with a standard floor.

In a known method of manufacturing plates typically be coated plates using fibrous plates of high density (HDF), the upper side of which is so removed approximately 0.3 mm On the upper side and the lower side to be coated plate formed shagreen, which is also called press patina or bargain layer. Shagreen occurs when pressing fibrous or strand of carpet and is created by the hot surfaces of the press plates or tape media. The thickness of shagreen leather is about 0.3 mm So as to reduce the depth of the irregularities on the upper side to be coated plate before applying the following layers soshlifovyvajutsja entire shagreen and 0.1 mm of the core material, the plate should be thicker than the corresponding allowance for grinding that constantly affects the cost of manufacture. For the manufacture produced using the direct print appropriate standards of floor laminate thickness of 6 mm subject to floor plate should have a thickness of at least 6,1 mm

So shagreen should be so removed completely, as it is the area of heat during hot pressing so high that the adhesive hardens too quickly, resulting adhesive jumpers, at least partially destroy what I'm doing damage layer receptive. This destruction of the adhesive jumper makes boards are susceptible to lifting deposited on the carrier plate decorative and wear-resistant layers. These uplifts are called calaminarian which may occur already at normal load and the typical wood dimensional changes due to climatic fluctuations.

Therefore, there is a great need for wear-resistant laminated panels, which are within thickness tolerance specified in the above standard.

In addition, there is a need for resource-saving method of manufacture, which largely eliminates the extra costs due to additional steps of the process and/or additional materials.

In an unpublished source EP 2 236 313 offered soshlifovat only part of shagreen leather, namely 0.1 mm thickness. This method can achieve savings of material is almost 5%, which saves wood, glue and part required for processing energy. The corresponding standard laminated panel thickness 6 mm can be made using the described in this printed publication method, you want to floor slab with a thickness of 5.8 mm In the standard method of manufacture is subject to floor plate should have a thickness of 6.1 mm

Based on formulated in this way the problems described first method of manufacturing the panels should improve the manufacture of panels, especially floor panels.

To solve the method has the following steps:

a) dispersion adhesive covered wood fibers or wood chips in chipboard carpet

b) pressing chipboard carpet under the influence of high temperature in a large subject to cover plate, which is provided roughly pressed and, at least on its upper side is formed in the manufacture of shagreen,

C) applying a first coat of the liquid resin, melamine-based on the upper side to be coated plate, and the resin at least partially penetrates into the upper surface layer to be coated plate and at least partially impregnates and improves the properties of the field of shagreen leather,

g) drying the primer,

d) applying a primer to the primer,

e) drying of the primer,

g) applying at least one saturated pigments of water-based lacquer to create the pattern,

C) drying of the pattern

I) applying a sealing layer of enriched wear-resistant particles and cellulose fibers, resins, melamine-based,

K) drying the sealing layer,

l) Nanase is their first coat of the liquid resin, melamine-based on lower side to be coated plate, moreover, the resin at least partially penetrates into the lower surface layer to be coated plates,

m) drying the primer,

h) applying a stabilizing layer on the lower side to be coated plates,

on pressing the layered structure under the influence of pressure and temperature,

p) the division subject to the floor plate on the panel of the desired width and length,

p) the application of the connecting means and locking elements on the opposite side edges for glueless connection and fixation of several panels laid in a floating manner, the floor structure.

It turned out that due to the priming of the liquid resin, melamine-based, which is then applied primer, damaged adhesive jumpers are being repaired or are aligned in such a way that then put layers of not more susceptible to uplift.

Due to the fact that the carrier plate can be made thinner, increases the rate of heating of the press and, thus, its output capacity (number/unit of time). As shagreen no longer requires grinding, saving not only time for processing, which reduces the production time, but also reduced and the current cost of a grinding belt. So how is the layer most of the original thickness, the hot press is Finance may occur at lower pressure and/or higher speed. The adjustment window press for hot pressing to optimize performance because of this increased.

Due to the penetration of the resin in the top layer to be coated plate, on the one hand, compensated properties of shagreen leather and at the same time creates a good basis for the pattern and wear-resistant layer. In practice it was found that the risk of delaminated floor panels, which are made according to the invention is low. Was achieved noticeable improvement in quality.

The preferred way as to be coated plate used fiber Board medium density (MDF), fiber Board, high density fiberboard (HDF) or particle Board.

A preferred manner, the thickness to be coated plate is from 4 to 12 mm, particularly preferred way of 5.8 mm, and shagreen is particularly preferred manner, a thickness of approximately 0.2 mm

The wettability of the surface of a rough draft be molded floor plate may be the preferred way, also need to be adjusted due to the fact that before pressing on the upper side of chipboard carpet cause additive. The preferred way, this additive is applied before entering chipboard carpet in the press for hot pressing (for example, press continuous action).

P is impactfully way the additive is a surfactant or consists of surfactants and other components. A particularly preferred way, it is in liquid form.

Along with surfactants, other components of the additive can be biocides, stabilizers and/or polymers. Preferably, the proportion of surface-active substances is more than 90%.

Practical experiments have shown that the positive effect is achieved if the additive is uniformly applied to the surface of chipboard carpet in an amount of from 1 to 30 mg/m2.

The preferred way, as a wear-resistant particles in the layer of protective coating is used, the particles of corundum.

After division multiple panels can be Packed in one packing.

The panel with a core of wood fibers or wood chips has the following characteristics:

a) top side, bottom side, and two pairs of opposite side edges,

b) upper and lower sides of the core are formed during the extrusion shagreen,

C) at least shagreen on the upper side of the applied primer layer, the primer layer on at least one patterned layer and the wear-resistant layer,

g) on the lower side of the core caused the primer layer and the stabilizing layer,

d) a primer layer, at least partially impregnates shagreen with the upper hand.

The preferred method, the primer layer is composed of melamine resin. The preferred way, on the primer layer, at least on the upper side of the shagreen additive applied.

Along with cellulose fibers, wear-resistant layer includes a wear-resistant particles, the preferred way particles of corundum.

The proposed technology is valid for the thickness of the panels from 4 to 12 mm

Next, the proposed method is illustrated on the example meets the requirements of DIN 13329 6 mm laminate floor.

First, the chips turn into fibers or milled into flakes. Then the fibers or chips covered with glue, for example melamine resin. Using the spreading device is covered with glue and dried wood fibers or wood chips scattered on continuously circulating conveyor belt. Fibers or chips may be scattered in several layers. The location of the chip in adjacent layers may be offset by 90°. Multiple chipboard carpet is fed by the conveyor belt in the press continuous action, which under high pressure and at high temperature adhesive covered wood fibers or wood chips pressed into large-scale mean is adjacent to the floor plate of the desired thickness, the preferred manner of a thickness of approximately 5.8 mm Immediately before entering chipboard carpet press the upper side of the chipboard carpet can be uniformly moistened with an additive. The additive is applied in an amount of about 1 to 30 mg/ m2. It consists of surfactants or surface-active substances with other components, such as, for example, biocides, stabilizers and/or polymers. The additive may be filled, if it is available in powder form, or applied by spraying, if it is liquid. After pressing chipboard carpet to be coated plate on the upper side and the lower side has a shagreen, which arose due to pressing fibrous or strand of carpet. Then shagreen to ensure wetting of surfaces primed with liquid resin-based melamine. The resin solidified their components, at least partially penetrates into the upper surface layer and permeates shagreen at a depth of 0.2 mm, thereby improving the properties of shagreen leather.

Then comes the drying process. To the dried primer is applied and then dried layer of primer. On the dried primer layer is applied to at least one enriched color pigment water-based lacquer to create the pattern. The figure can be the ü monochrome, with wood, imitation tile or fancy patterns. It is also possible patterns imitating natural stone. After the base coat with a pattern dries, apply the sealing layer, at least one enriched wear-resistant particles and cellulose fibers with resin. The resin is made on the basis of melamine. Then caused to the sealing layer is dried and then the bottom side to be coated plates primed with liquid resin, melamine-based and resin at least partially penetrates into the lower surface layer and, under certain conditions, at the bottom shagreen. Then the primer is completely dried on the lower side to be coated plates as a stabilizing layer, the layer of liquid resin. Then this layered structure when exposed to pressure and temperature is pressed.

Improved thus be large floor plate is divided into panels of the desired size. Then opposite side edges of the divided panels are profiling relevant to each other connecting means and locking elements, through which you can connect and lock to each other is performed in the same way the panel to make a stacked floating image of the floor structure.

The number of the divided panels in a known manner are Packed in packing and if necessary, are stored.

It is well known that in the direct coating process, i.e. the application of a layer with a pattern and/or wear-resistant layers on the surface to be coated slabs of MDF/HDF in liquid form, due to different absorbency on the surface of the plates result in undesirable distortion of the pattern, which usually become visible only after lamination. Contribute to this heterogeneity themselves chipboard, which for the most part are the result of changing methods of preparation of wood, which made fiber as the main component of the fiber plates medium (MDF)/ high (HDF) density. These changes are a consequence of, for example, seasonal or geographical access, and the type of wood, especially the density and pH of this wood, and wood. Ideally, the method of preparation of the wood should not have fluctuations in density and/or fluctuations in pH. Beech, for example, requires the splitting of the fibers 60 kW/t, pine roughly 120 kW/T. Therefore, when processing the worst result is obtained from the fibers of pine and beech, in contrast, are formed almost dust-like particles. When hot pressing is formed above as disadvantageous heterogeneous fibrous plate medium (MDF)/ high (HDF) tight the tee. Additive, which may be incurred before receipt of chipboard carpet in the press, as already mentioned, affects the wettability of the surface of the plate. Due to this also produces a uniform absorbing capacity of the surface plate, so that well-known still undesirable distortion of the pattern is now being excluded.

The drawing shows a fragment of a draft profile fibrous plates of high density (HDF) to use for flooring. Denoted by reference symbol 1 region is the so - called bargain layer (shagreen), which in the plates was so removed. Denoted by reference symbol 2 area is an area, which contains an additional additive. The chart shows the density of the raw material in kg/m3and the plate thickness in mm is Clearly seen that the density of the raw material within the shagreen leather quickly increased up to a range of over 1000 kg/m3and then in the core decreases again to the center of the core.

1. A method of manufacturing panels with the following steps:
a) dispersion adhesive covered wood fibers or wood chips in chipboard carpet,
b) pressing chipboard carpet under the influence of high temperature in a large subject to cover plate, which is provided roughly pressed and, hence, is her least on its upper side is formed in the manufacture of shagreen,
C) applying a first coat of the liquid resin, melamine-based on the upper side to be coated plate, and the resin at least partially penetrates into the upper surface layer to be coated plate and at least partially impregnates and improves the properties of the field of shagreen leather,
g) drying the primer,
d) applying a primer to the primer,
e) drying of the primer,
g) applying at least one saturated pigments of water-based lacquer to create the pattern,
C) drying pattern,
I) applying a sealing layer of enriched wear-resistant particles and cellulose fibers, resins, melamine-based
K) drying the sealing layer,
l) applying a first coat of the liquid resin, melamine-based on lower side to be coated plate, and the resin at least partially penetrates into the lower surface layer to be coated plates,
m) drying the primer,
h) applying a stabilizing layer on the lower side to be coated plates,
on pressing the layered structure under the influence of pressure and temperature,
p) the division subject to the floor plate on the panel of the desired width and length,
p) the application of the connecting means and locking elements on the opposite side the new edges for glueless connection and fixation of several panels laid in a floating manner, the floor structure.

2. The method according to p. 1, characterized in that as to be coated plates using fiber plate medium density (MDF), fibrous slab of high density fiberboard (HDF) or particle Board.

3. The method according to p. 1, characterized in that the shagreen has a thickness of approximately 0.2 mm

4. The method according to p. 1, characterized in that to control the wettability of the surface of a rough draft be molded floor plate before pressing on chipboard carpet cause additive.

5. The method according to p. 4, characterized in that the additive is a liquid.

6. The method according to p. 4, characterized in that the additive is a surfactant or consists of surfactants and other components.

7. The method according to p. 6, wherein the other components are biocides, stabilizers and/or polymers.

8. The method according to p. 6, characterized in that the proportion of surfactants is more than 90%.

9. The method according to p. 4, characterized in that the additive is applied directly before entering chipboard carpet in the press.

10. The method according to p. 4, characterized in that the additive is applied in the amount of 1-30 mg/m2with a uniform distribution.

11. The method according to p. 1, characterized in that the primer penetrates into shagreen at a depth of 0.2 mm

12. The method according to p. 1, characterized in that the image quality is as wear-resistant particles are used, the particles of corundum.

13. Panel with molded core of wood material, primarily of fibers or chips with the following characteristics:
a) top side, bottom side, and two pairs of opposite side edges,
b) upper and lower sides of the core are formed during the extrusion shagreen,
C) at least shagreen on the upper side of the applied primer layer, the primer layer on at least one patterned layer and the wear-resistant layer,
g) on the lower side of the core caused the primer layer and the stabilizing layer,
d) a primer layer, at least partially impregnates shagreen with the upper hand.

14. The panel p. 13, characterized in that, at least on the upper side of the under coat of primer on shagreen additive applied.

15. The panel p. 14, wherein the additive is a surfactant or consists of surfactants and other components is a liquid.

16. The panel p. 13, characterized in thickness from 4 to 12 mm



 

Same patents:

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13 cl, 2 dwg, 8 tbl

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FIELD: process engineering.

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4 cl, 4 ex, 4 tbl

Decorative element // 2474479

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FIELD: process engineering.

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10 cl, 5 dwg

FIELD: chemistry.

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26 cl, 7 dwg, 15 tbl, 8 ex

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EFFECT: higher efficiency.

4 cl, 7 dwg

FIELD: construction.

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11 cl, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to decorative laminated board and to method of its production. Method comprises the following stages. Preparing the board of fibrous or chip material, coating the board on, at least, one side with liquid glue hardened by pressure and/or heat. Building up of decorative layer not impregnated with resin on glue layer. Applying thermoplastic or liquid cover material o decorative layer. Pressing and heating laminar structure thus made to form surface structure of cover layer.

EFFECT: simple and efficiency process.

6 cl

FIELD: chemistry.

SUBSTANCE: present invention relates to a resin used in coating and/or making shaped articles, which contains a hydroxy-aromatic compound of formula (VIII)

, where R1 R2, R4 and R5 denote H, C1-12 alkyl group, EWG denotes COOC1-12 alkyl group, which is obtained by reacting a hydroxy-aromatic compound of formula (IV) with a compound of formula (VI), if needed, in the presence of a catalyst, formula (IV), representing: , where R1 R2, R4, R3 and R5 denote H, C1-12 alkyl group, and formula (VI): , where R6 and R12 denote C1-12 alkyl group.

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7 cl, 2 dwg, 1 ex

FIELD: chemistry.

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11 cl, 2 tbl, 13 ex

The invention relates to the production of glulam structures and can be used for manufacturing small wall materials, small prefabricated structures, structural members and the designs themselves, as well as items of flooring and roof, suspended or false ceilings, joinery and furniture boards

The invention relates to chemical technology, in particular to the field of plastics

FIELD: chemistry.

SUBSTANCE: composition contains a polymer which contains hydroxyl groups, a polyfunctional cross-linking gent and, optionally, a catalyst. The polymer which contains hydroxyl groups is a polyvinyl alcohol or a mixture of starch and polyvinyl alcohol. The polyvinyl alcohol is hydrolysed. The polyfunctional cross-linking agent is substituted glycosal and is present in concentration of at least 25 wt %. The catalyst is selected from a group comprising ammonium chloride, ammonium sulphate, phosphoric acid, p-toluic acid and mixtures thereof. The composition is used as binder for producing a composite product. The composite product is obtained by depositing a curable aqueous composition onto lignocellulosic materials and then hardening the said composition. Lignocarbohydrate material is plywood, plywood, fibrous wood chipboard, medium-density fiberboard and a board with oriented fibres.

EFFECT: curable aqueous composition contains a large amount of non-volatile substances, is stable, hardens quickly and does not release any poisonous gases during solidification.

11 cl, 2 tbl, 13 ex

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