CN106836726A - A kind of locking multi-layer solid wood composite floor and its preparation method - Google Patents

Abstract

The invention discloses a locking multi-layer solid wood composite floor and a preparation method thereof, which comprises: a floor body (1) and a tenon (2) and a tenon (3) whose shapes match with each other, wherein the floor body (1) Comprising: a wear-resistant layer (11), a wood surface plate (12) and a base material layer (13); wherein, the wood surface plate (12) and the base material layer (13) have been double-sided sanding. The present invention overcomes the problem of the release of free formaldehyde, a harmful substance in the existing solid wood composite floor, and the problem of ungluing and delamination of the veneers of each layer after a period of use, and also solves the problem of paving and separation of the existing multi-layer solid wood composite floor Large, large difference in assembly height, serious warping and deformation, and the problem of refurbishment and reuse after the floor has been used for a period of time.

Description

A kind of locking multi-layer solid wood composite floor and its preparation method

technical field

The invention relates to the field of building materials, in particular to a locking multi-layer solid wood composite floor and a preparation method thereof.

Background technique

With the development of my country's economy and the improvement of people's living standards, people have higher and higher requirements for the decoration effect and environmental protection performance of the living room. Due to the natural texture of wood on the surface of solid wood flooring and the incomparable high dimensional stability of solid wood flooring, the production and sales of solid wood composite flooring have gradually increased in recent years. In 2015, the output of solid wood composite flooring reached 95.5 million square meters, while solid wood flooring Only 39.9 million square meters.

Since solid wood composite flooring is a mid-to-high-end floor, its price is relatively high, and it accounts for a large proportion of the cost of room decoration. Once the floor is deformed, glued, etc., the effect of the floor is poor, and it usually needs to be replaced. economic losses to consumers.

At present, the solid wood composite flooring on the market still has the following problems:

1. The current solid wood composite floor, especially the multi-layer solid wood composite floor, is still mainly glued with formaldehyde-based adhesives such as urea-formaldehyde resin, and also needs to be spliced with commonly used wood floor splicing glue. Therefore, there are harmful substances in the finished floor The problem of free formaldehyde release, but this is easy to introduce harmful substance formaldehyde (formaldehyde is contained in commonly used splicing glue), causing pollution;

2. Most of the surface boards of multi-layer solid wood composite flooring are relatively thin, and some are even less than 0.6mm thick, which is not durable. After a period of use, the surface layer will be worn away, exposing the core layer substrate, which seriously affects the use;

3. Since most of the intermediate substrates of multi-layer solid wood flooring are made of low-density soft fast-growing artificial forests such as poplar, fir, and pine, and the water resistance of urea-formaldehyde resin is poor, the finished floor is prone to warping and twisting after being damp. Deformation problems, such as glue opening, delamination, bubbling, peeling, etc. will appear on individual floors, which seriously affect the use of the floor;

4. In the preparation process of most solid wood composite flooring, only the surface of the surface board is sanded, and the veneer of the core material base material in the middle is not sanded before gluing, so that the surface of the veneer produced during the rotary cutting process is rough and uneven Defects such as torn short fibers affect the bonding performance between veneers, which in turn affects the dimensional stability and service life of the base material obtained after veneer bonding;

5. At present, the general solid wood composite floor is basically spliced and installed in the way of flat opening. The pavement gap between the floor boards is large and the assembly height difference is large. After paving, the floor is not only unsightly, but also moisture and dirt can easily enter the floor. In the gap between the boards, the floor affects the durability of the floor;

6. The back of most solid wood composite floors is generally not sprayed with waterproof and moisture-proof paint, and is directly exposed. The wooden floor is easy to absorb water or moisture on the back, resulting in deformation, decay, and mildew resistance of the floor.

The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art.

Contents of the invention

The object of the present invention is to provide a locking multi-layer solid wood composite floor and its preparation method. The composite floor solves the problem of the release of free formaldehyde, a harmful substance in the existing solid wood composite floor, and the problem of the release of free formaldehyde in each layer after a period of use. The problem of glue separation and delamination of the boards also solves the problems of the existing multi-layer solid wood composite floor pavement with large gaps, large height differences in assembly, serious warping and deformation, and the renovation and reuse of the floor after a period of use.

In order to achieve the above object, the present invention provides a locking multi-layer solid wood composite floor, which includes: a floor body and tenons and mortises whose shapes match with each other, wherein the floor body includes:

A wear-resistant layer, the wear-resistant layer includes a top coat and a primer layer arranged from top to bottom, and the top coat includes a high-gloss finish paint layer and a wear-resistant top paint layer arranged from top to bottom, the The primer layer includes a wear-resistant primer layer, a hardened primer layer, an anti-crack primer layer, a waterproof primer layer and a putty layer arranged from top to bottom;

a timber skin panel that has been double-sided sanded on both the top and bottom surfaces and is positioned below said wear layer; and

The substrate layer, which is formed by gluing at least two layers of substrate veneers, is arranged below the wood surface, and the top and bottom surfaces of each layer of substrate veneers have been sanded on both sides before gluing, And the directions of the wood grains on the adjacent base material veneers are perpendicular to each other, so that the deformations of the adjacent base material veneers cancel and restrain each other, thereby improving the stability of the base material.

In another embodiment of the locking multi-layer solid wood composite floor, the floor body is rectangular, and the tenons and tenon grooves are respectively arranged on four sides of the rectangle.

In another embodiment of the lock multi-layer solid wood composite floor, the wood surface board is a hardwood surface board with a thickness of 2-4mm, and the wood species selected for the wood surface board include red oak, oak, walnut At least one of wood, ash, jatoba, birch, tubular neem, teak, merbau, maple, catalpa, maple and cherry; the base veneer includes 6 to 8 layers , and the multi-layer substrate veneers are fixedly connected to each other by adhesive bonding and hot pressing, and the wood surface board and the substrate layer are also bonded by adhesive and hot pressing. are fixedly connected to each other; wherein the thickness of each layer of the substrate veneer is 0.5-2.5mm, and the material of the substrate veneer is eucalyptus, hard miscellaneous wood or wood with similar properties, and wood such as poplar is not used; The above-mentioned adhesive is a formaldehyde-free adhesive without added formaldehyde, and the main component of the formaldehyde-free formaldehyde-free adhesive is a water-based polymer isocyanate adhesive, and no formaldehyde is added during the production and use process.

In another embodiment of the locking multi-layer solid wood composite floor, the surrounding and bottom surface of the locking multi-layer solid wood composite floor are spray-coated with a waterproof and moisture-proof layer.

The present invention also provides a method for preparing the locking multi-layer solid wood composite floor, comprising the following steps:

(1) boiling and softening the logs of broad-leaved timber and slicing them into the wood surface boards;

(2) Cook and soften the wood section of the base material and peel it into the base material veneer, carry out double-sided sanding on the top and bottom surfaces of the base material veneer, and then use the formaldehyde-free formaldehyde-free adhesive Multiple layers of the base material veneers are glued together, and then heat-pressed to form the base material layer;

(3) After double-sided sanding the top surface and the bottom surface of the wood surface plate, the base material layer is glued with the adhesive, and then hot-pressed to form a slab;

(4) Carrying out health-preserving treatment and tenoning to the slab; and

(5) Coating the top surface of the wood surface board with the wear-resistant layer.

In another embodiment of the above-mentioned method for preparing the interlocking multi-layer solid wood composite floor, in step (1), after cutting log segments into the wood surface boards, they need to be naturally air-dried to Moisture content is 6%～8%, then select the wood surface board that has no defects such as decay, worm eyes, cracks, dead knots, and less color deviation from the dry described wood surface board. The cooking and softening treatment can remove the growth stress of the hardwood timber and improve the dimensional stability of the veneer.

In another embodiment of the above-mentioned method for preparing the locking multi-layer solid wood composite flooring, in step (2), the base material veneer is glued together with the adhesive to form the base material layer, It is formed by hot pressing with a hot press, wherein the amount of glue applied to the adhesive and the parameters of the hot pressing process are as follows: the amount of glue applied is 280-320g/m ² , the hot-pressing temperature is 130-140°C, and the hot-pressing time is 3-3 4min, pressure 1.0 ~ 1.8MPa; in step (3), the substrate layer and the wood surface plate are assembled and bonded together, and then hot press is used for hot pressing. The hot pressing process parameters are: hot pressing temperature 130~ 140°C, time 3-4min, pressure 1.0-1.8MPa, among which sanding is carried out by using a sander, and under the action of the pressure of the sander, the wood can further release the growth stress of high-quality hardwood wood and increase the size of the hardwood veneer stability, while reducing the surface roughness of hardwood veneers and improving the wettability of the surface of hardwood veneers, thereby improving the bonding performance between hardwood veneers.

In another embodiment of the above-mentioned method for preparing the locking multi-layer solid wood composite floor, in step (4), the step of curing the slab is as follows: put the slab at a temperature of 23±3°C, Under the condition of relative humidity of 45%±5%, carry out equilibrium treatment for 5-8 days.

In another embodiment of the above-mentioned method for preparing the locking multi-layer solid wood composite floor, a tenon and a tenon are formed on the cured slab so that adjacent composite floors can be fitted and connected to each other, and the tenon and tenon are formed. The four sides and the bottom surface of the slab of the tongue and groove are sprayed with the waterproof and moisture-proof layer for 8 to 10 times.

In another embodiment of the above-mentioned method for preparing the locking multi-layer solid wood composite floor, in step (5), the surface of the wood surface board is first coated with a primer, and then the primer is polished by sanding After the surface is finished, the topcoat is applied.

Compared with the prior art, the present invention has the following beneficial effects:

1. The multi-layer solid wood composite floor of the present application is glued with formaldehyde-free and formaldehyde-free adhesive with high water resistance, which solves the problem of harmful substance formaldehyde release in the multi-layer solid wood composite floor from the source; Compared with the urea-formaldehyde resin commonly used in laminate flooring, this organic resin has better water resistance, gluing performance and high temperature resistance. Therefore, the multi-layer solid wood composite floor prepared by using this organic resin gluing;

2. The multi-layer solid wood composite floor of this application adopts a high-quality hardwood veneer with a thickness of 2 to 4mm as the surface board, and sprays it with wear-resistant paint, and sprays the floor surface in multiple layers to form a wear-resistant paint on the floor surface. layer; compared with the surface veneer of about 0.6mm used in ordinary multi-layer solid wood composite flooring, it significantly provides the wear resistance of the floor surface and the texture of the floor surface; Finally, it can also be painted after planing the surface coating, which can prolong the service life by 3 to 5 times and save natural wood resources;

3. The base material layer used in the multi-layer solid wood composite floor of the present application does not use poplar and other woods with large deformation, easy shrinkage and swelling, and poor stability, but eucalyptus or wood veneers with similar properties. Increased floor stability;

4. Before gluing the substrate veneers of each layer of the multi-layer solid wood composite flooring of the present application, the substrate veneers are sanded on both sides, so that the thickness of the substrate veneers becomes uniform, releases the wood growth stress in the veneers, and improves The dimensional stability of the substrate veneer; at the same time, reduce the surface roughness of the substrate veneer surface, improve the surface wettability of the substrate veneer, and then improve the bonding performance between the substrate veneers;

5. The multi-layer solid wood composite floor of this application is connected by locks, which does not need to be spliced with splicing glue, which reduces the splicing gap and assembly height difference between the floor boards, improves the decorative aesthetics of the floor, and locks at the same time Splicing also enhances the floor's ability to resist deformation, dimensional stability, prolongs the service life of the floor, and reduces maintenance costs in the later period;

6. For the multi-layer solid wood composite flooring of the present application, waterproof paint is sprayed on the periphery and the back of the floor several times to seal the floor and prevent moisture from entering the floor, thereby improving the dimensional stability of the floor and preventing the floor from warping and deformation.

Description of drawings

Fig. 1 is a structural schematic diagram of a locking multi-layer solid wood composite floor according to the present invention.

Explanation of main reference signs:

1-floor body, 2-mortise, 3-mortise, 11-wear layer, 12-wood surface, 13-substrate layer, 14-substrate veneer, 15-waterproof and moisture-proof layer

detailed description

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Example 1

1) American red oak wood veneer was selected as the surface veneer. First, red oak logs were cooked and softened, then sliced into veneers with a thickness of 2.3mm, and then naturally air-dried to a moisture content of 7%. Among the high-quality red oak veneers, choose the veneer without decay, insect eyes, cracks, dead knots and other defects, and with small color deviation as the floor surface veneer;

2) Selecting Eucalyptus urophylla veneer wood as the base material, steaming and softening the logs of Eucalyptus urophylla, and then rotary-cutting the Eucalyptus urophylla veneer, and drying to a moisture content of 7%;

3) Double-sided sanding of the dried Eucalyptus urophylla veneer, according to the vertical formation method of the veneer texture of the adjacent layer, using an environmentally friendly high water resistance formaldehyde-free adhesive without adding formaldehyde, and the amount of glue applied is 280g /m ² , under the gluing process parameters of hot-pressing temperature 130°C, hot-pressing time 3min, and pressure 1.0MPa, 7-layer plywood for multi-layer solid wood composite flooring was obtained by gluing.

4) After sanding the surface of Eucalyptus urophylla base material and coating with formaldehyde-free, environmentally friendly, high water-resistant and formaldehyde-free adhesive, it was assembled with red oak hardwood veneer sanded on both sides. Under the technical conditions of time 3min and pressure 1.3MPa, the multi-layer solid wood composite floor slab is formed by hot pressing.

5) Put the hot-pressed floor slab under the conditions of temperature 23±3°C and relative humidity 45%±5% for balance treatment for about a week, and make tenon and tenon grooves around the floor as shown in Figure 1.

6) Using the method of multiple spraying, spray waterproof paint around and on the back of the floor and dry it;

7) Carry out wear-resisting finishing to floor surface and dry;

8) Quality inspection and packaging storage.

Example 2

1) Merbau wood veneer is selected as the surface veneer for multi-layer solid wood composite flooring. First, the wood section of merbau log is steamed and softened, and then sliced into veneers with a thickness of 3.3mm, and then air-dried to moisture 7%; from the dried merbau veneer, select the veneer without decay, insect eyes, cracks, dead knots and other defects, and with small color deviation as the floor surface veneer;

2) Selecting Eucalyptus urophylla veneer wood as the base material, steaming and softening the logs of Eucalyptus urophylla, and then rotary-cutting the Eucalyptus urophylla veneer, and drying to a moisture content of 7%;

3) Double-sided sanding of the dried Eucalyptus urophylla veneer, according to the vertical formation method of the veneer texture of the adjacent layer, using an environmentally friendly high water resistance formaldehyde-free adhesive without adding formaldehyde, and the amount of glue applied is 280g /m2, under the gluing process parameters of hot-pressing temperature 130°C, hot-pressing time 3min, and pressure 1.0MPa, 7-layer plywood for multi-layer solid wood composite flooring was obtained by gluing.

4) After sanding the surface of the Eucalyptus urophylla base material and coating an environmentally friendly and highly water-resistant formaldehyde-free adhesive without adding formaldehyde, it is assembled with the double-sided sanded merbau veneer. The amount of glue applied is 280g/ m ² , hot-pressing temperature 130°C, time 3min, pressure 1.3MPa, the hot-pressing is formed into a multi-layer solid wood composite floor slab.

5) Put the hot-pressed floor slab under the conditions of temperature 23±3°C and relative humidity 45%±5% for balance treatment for about a week, and then open locks and lock grooves around the floor as shown in Figure 1.

6) Using the method of multiple spraying, spray waterproof paint around and on the back of the floor and dry it;

7) Carry out wear-resisting finishing to floor surface and dry;

8) Quality inspection and packaging storage.

Example 3

1) The jatoba wood veneer is selected as the surface veneer for multi-layer solid wood composite flooring. Firstly, the jatoba log segments are steamed and softened, then sliced into veneers with a thickness of 2.3mm, and then air-dried to a moisture content of 7 %; From the dried jatoba veneer, select a veneer without decay, insect eyes, cracks, dead knots and other defects, and with less color deviation as the floor surface veneer;

2) Eucalyptus urophylla was selected as the base material veneer wood, and the logs of Eucalyptus urophylla were cooked and softened, and then the veneer of Eucalyptus urophylla was peeled and dried to a moisture content of 7%;

3) Double-sided sanding is carried out on the dried giant eucalyptus veneer. According to the vertical formation method of the veneer texture of the adjacent layer, the formaldehyde-free environmentally friendly and high water-resistant formaldehyde-free adhesive is used. The amount of glue applied is 250g. /m ² , under the gluing process parameters of hot-pressing temperature 130°C, hot-pressing time 3min, and pressure 1.2MPa, 7-layer plywood for multi-layer solid wood composite flooring was obtained by gluing.

4) After sanding the surface of the Eucalyptus eucalyptus substrate and coating an environmentally friendly and highly water-resistant formaldehyde-free adhesive without adding formaldehyde, it is assembled with the Jatoba veneer after double-sided sanding. The amount of glue applied is 250g/ m ² , under the technological conditions of hot-pressing temperature 130°C, time 3min, and pressure 1.3MPa, it is hot-pressed into a multi-layer solid wood composite floor slab.

5) Put the hot-pressed floor slab under the conditions of temperature 23±3°C and relative humidity 45%±5% for balance treatment for about a week, and then open locks and lock grooves around the floor as shown in Figure 1.

6) Using the method of multiple spraying, spray waterproof paint around and on the back of the floor and dry it;

7) Carry out wear-resisting finishing to floor surface and dry;

8) Quality inspection and packaging storage.

Product quality performance:

According to the requirements of the national standard GB/T 18103-2013 "solid wood composite flooring", it was tested and compared with two common solid wood composite floors (multi-layer solid wood composite flooring and three-layer solid wood composite flooring) randomly sampled on the market. The results as follows:

Table 1 Comparison of product quality and performance

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. it is a kind of to latch multi-layer solid wood composite floor, it is characterised in that the lock multi-layer solid wood composite floor includes：Floor sheet Tenon (2) and tongue-and-groove (3) that body (1) and shape cooperate, wherein the floor body (1) includes：

Wearing layer (11), the wearing layer (11) includes the top coat layer and prime coat that set from top to bottom, and the top coat layer Including the bloom top coat layer and wear-resisting top coat layer that set from top to bottom, the prime coat includes the wear-resistant primer for setting from top to bottom Layer, hardening primer layer, anticracking prime coat, waterproof prime coat and putty layer；

Timber dash board (12), its top surface and bottom surface by two-sided sanding and have been arranged on wearing layer lower section；And

Substrate layer (13), it is formed by base material veneer (14) gluing of at least two-layer, and is arranged under the timber dash board (12) Side, the top surface of each layer base material veneer (14) and bottom surface are by two-sided sanding, and adjacent base material veneer before gluing (14) direction of the grain of wood on is perpendicular to one another.

2. lock multi-layer solid wood composite floor according to claim 1, it is characterised in that the floor body (1) is square Shape, the tenon (2) and tongue-and-groove (3) are separately positioned on the four edges of the rectangle.

3. lock multi-layer solid wood composite floor according to claim 1, it is characterised in that the timber dash board (12) is wealthy Leaf material dash board, is mutually permanently connected between the base material veneer (14) by adhesive gluing and hot pressing, and the wood It is mutually permanently connected also by adhesive gluing and hot pressing between material dash board (12) and the substrate layer (13)；Optionally, The material of wherein described base material veneer (14) includes Eucalyptus, hardwood or the similar timber of material；Optionally, the adhesive is Formaldehydeless addition without aldehyde adhesive.

4. lock multi-layer solid wood composite floor according to claim 1, it is characterised in that the lock multi-layer solid wood is combined The surrounding on floor and bottom surface are coated with waterproof and dampproof layer (15).

5. a kind of method for preparing lock multi-layer solid wood composite floor, comprises the following steps：

(1) log cooking of broadleaf timber is softened into simultaneously slicing into the timber dash board (12)；

(2) base material juggle boiling is softened and is peeled into the base material veneer (14), by the top surface of the base material veneer (14) and Bottom surface is carried out base material veneer (14) described in multilayer is glued, Zhi Houzai after two-sided sanding by formaldehydeless addition without aldehyde adhesive Hot pressing forms the substrate layer (13)；

(3) top surface of the timber dash board (12) and bottom surface are carried out after two-sided sanding with the substrate layer (13) by described Adhesive is glued, hot repressing afterwards forms slab；

(4) slab is carried out into health treatment and mortise；And

(5) top surface of timber dash board (12) is covered with paint, lacquer, colour wash, etc. into the wearing layer (11).

6. it is according to claim 5 lock multi-layer solid wood composite floor method, it is characterised in that in step (1), By the slicing of log juggle into after the timber dash board (12), it is necessary to its natural gas is done to moisture content 6%~8%, Ran Houxuan With flawless timber dash board (12).

7. it is according to claim 5 lock multi-layer solid wood composite floor method, it is characterised in that in step (2), adopt It is with described adhesive that the base material veneer (14) is glued as the substrate layer (13) and hot-forming using hot press, The glue-spread and hot pressing parameterses of wherein described adhesive be：280~320g/m of glue-spread², hot pressing temperature 130~140 DEG C, 3~4min of hot pressing time, 1.0~1.8MPa of pressure；In step (3), by substrate layer (13) together with timber dash board (12) Assembly is simultaneously bonded, and recycling hot press is hot-forming, and hot pressing parameterses are：130~140 DEG C of hot pressing temperature, the time 3~ 4min, 1.0~1.8MPa of pressure, wherein carrying out sanding by using sander.

8. it is according to claim 5 lock multi-layer solid wood composite floor method, it is characterised in that in step (4), will The step of slab carries out health is as follows：The slab is placed in 23 ± 3 DEG C of temperature, is entered under conditions of relative humidity 45% ± 5% Row Balance Treatment 5-8 days.

9. it is according to claim 5 lock multi-layer solid wood composite floor method, it is characterised in that the slab after health On issue the tenon and tongue-and-groove that adjacent composite floor board is mutually fitting to connection, and the four of the slab of tenon and tongue-and-groove will be issued Week and bottom surface spray 8~10 waterproof and dampproof layers (15).

10. it is according to claim 5 lock multi-layer solid wood composite floor method, it is characterised in that in step (5), Priming paint is first covered with paint, lacquer, colour wash, etc. on the surface of the timber dash board (12), then finish paint painting is carried out again after the priming paint face is polished in sanding Decorations.