KR101326369B1 - Plywood flooring - Google Patents

Abstract

The present invention relates to a plywood floor resistant to the deformation in the width direction, consisting of a surface protective layer, a surface layer and a substrate layer from above, and provides a plywood floor characterized in that the substrate layer is a laminated plywood in the longitudinal direction.

Width Deformation, Plywood Floor

Description

Plywood flooring resistant to deformation in width direction {Plywood flooring}

The present invention relates to plywood floor, and more particularly to plywood floor resistant to deformation in the width direction.

The commonality between laminated veneer lumber (LVL) and plywood is to fabricate multiple veneers.

The difference is that in the lamination direction, the LVL laminates the end plate (veneer) only in the direction parallel to the neck (fiber direction), but the lamination laminates the adjacent end plate so that the fiber direction is orthogonal.

Therefore, LVL is suitable for use in force receiving parts such as lumber, pillars and beams, and plywood has a small shrinkage and expansion, and especially, a low thickness expansion, so that it is widely used for furniture and flooring materials.

In the case of conventional plywood flooring, the plywood material itself is more stable than other materials in shrinkage and expansion. However, if the expansion and contraction force of the veneer can not be overcome, dimensional deformation will occur. It is connected to the occurrence of defects.

Existing reinforced floor is made of high-density fiberboard (HDF), so the dimensional deformation (shrinkage and expansion) is large depending on the season, causing gaps between products, which is the representative type of defect that causes the most complaints of users. .

In Japanese Patent Laid-Open No. 2000-167809, log materials are cut in a single plate using a rotary race, and the cut end plates are laminated in parallel with their respective material surfaces, and a parallel laminated plywood is formed by press bonding. The plywood is cut vertically in the direction perpendicular to the longitudinal direction of the laminated plywood, inclined or curved direction, the surface of the material interlocking wood grain appearance to appear on the cut surface, and the surface of the material surface interlocking wood grain is used as a parallel lamination Disclosed is a method for processing makeup wood using a material surface of plywood.

Korean Patent Laid-Open Publication No. 2007-107720 discloses a method for manufacturing plywood comprising the steps of: bonding a piece of plank-shaped flat wood to a beam-shaped wood block with an adhesive; Disclosed is a method of manufacturing plywood comprising the step of performing one or more of tempering, cutting a beam-shaped wood block into plywood, and drying the obtained plywood until the humidity content is below the fiber saturation point. It is.

Japanese Laid-Open Patent Publication No. 1999-227105 discloses a wood-based composite plate, in which a plurality of cuts cut off the surface fiber layer are bonded to the surface of the plywood with an adhesive using a wood fiber board formed so as to be orthogonal to the longitudinal direction of the plate. have.

An object of the present invention is to provide a plywood floor that can prevent the gap opening deformation of the plywood floor, and particularly prevents curling in the width direction due to the difference in shrinkage expansion of the veneer and plywood.

In order to achieve the above object, the present invention provides a plywood floor comprising a surface protective layer, a surface layer and a substrate layer from above, wherein the substrate layer is a plywood laminated in a vertical direction.

The present invention is characterized in that the gap between the plywood floor and the widthwise warpage is prevented by fabricating the substrate plywood in the longitudinal direction.

In the present invention, the surface layer may be a veneer, a printed layer, a printed film, etc., when the printed layer or the print film is laminated as the surface layer, the warp in the width direction is small, but when the veneer is used as the surface layer, the difference in shrinkage and expansion of the veneer and plywood The greater the warp due to the width, the thicker the thickness, like wood veneer, the greater the warp width.

In the present invention, the vertical laminated plywood is used as a base material, and even when a thick 3 mm thick veneer is used, it is very resistant to warp in the width direction due to the difference in shrinkage and expansion of the veneer and plywood.

According to an embodiment of the present invention, high density end plates may be attached to both sides of the base layer, and the high density end plates used may use high density fiber boards (HDF) or wood end plates having a density of 0.6 to 1.0 g / cm 3. By using a high density single plate, it is possible to give a click shape to improve the construction speed.

In this way, by applying a high-density solid end plate to the edge can be given a click shape, it is possible to obtain a flooring material having a dimensional stability while giving a high-click click structure as in the existing reinforced floor.

According to another embodiment of the present invention, the side of the base layer may have a T & G (Tongue and Groove) bonding structure.

In the present invention, a groove may be formed on the rear surface of the base layer, and the groove reduces the dimensional change of the plywood floor and improves adhesion to the floor.

In addition, the present invention comprises the steps of laminating a plurality of end plates in the horizontal direction; Cutting in the vertical direction at the side edges of the laminate to obtain a plywood having vertically laminated single plates; Stacking a surface layer on the vertical laminated plywood as a substrate layer and forming a surface protective layer; And it provides a method of manufacturing a plywood floor comprising the step of forming a T & G bonding structure consisting of protrusions and grooves on the side of the vertical laminated plywood.

In addition, the present invention comprises the steps of laminating a plurality of end plates in the horizontal direction, the high-density end plate on the top layer and the bottom layer; Obtaining plywood having vertical plates laminated vertically and high density single plates laminated on both sides by cutting in the vertical direction at the side edges of the laminate; Stacking a surface layer on the vertical laminated plywood as a substrate layer and forming a surface protective layer; And it provides a method for producing a plywood floor comprising the step of forming a click bonding structure on the high-density end plate on the side of the vertically laminated plywood.

The present invention can prevent the opening gap deformation of the plywood floor by manufacturing the base plywood in the longitudinal direction, and is particularly resistant to warp in the width direction due to the difference in shrinkage expansion of the veneer and plywood.

In addition, by applying a high-density solid end plate to the edge as an application structure can be given a click shape, it is possible to obtain a flooring material having a dimensional stability while giving a high-click click structure, as in the existing reinforced floor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a cross-sectional view of a conventional plywood floor, which is composed of a surface protection layer 10, a surface layer 20 and a horizontal laminated plywood 30 from above.

The horizontal laminated plywood 30 is used as a general substrate layer of plywood floor, which is a laminate of three to seven veneers in the horizontal direction.

A side surface of the plywood 30 may be formed with a T & G bonding structure consisting of the protrusions 31 and the grooves 32 for bonding between the substrate, the groove portion 33 for improving the dimensional stability and adhesion is also formed on the back Can be.

2 is a cross-sectional view of a conventional reinforcement floor, which is composed of a surface protection layer 10, a surface layer 20 and a high density fiber board 40 from above.

Sides of the high-density fiber plate 40 may be formed with a click coupling structure (41, 42) for bonding between the substrate.

Figure 3 is a cross-sectional view of the plywood floor according to an embodiment of the present invention, the floor covering is composed of a surface protection layer 10, a surface layer 20 and a vertical laminated plywood 50 from above.

The surface protection layer 10 is a layer that protects the surface, for example, may be formed by applying a UV paint and then curing.

The surface layer 20 is a layer for implementing the appearance effect, for example, it may be used veneer, printed layer, printing film and the like. As the veneer, it can be used from general veneer with a thickness of about 0.5 mm to solid veneer with a thickness of about 3 mm, and a transfer printing layer can be used as the printing layer, and polyethylene terephthalate (PET) and polyvinyl chloride as the printing film. (PVC) film etc. can be used. By using the vertically laminated plywood 50 as the substrate, even if a thick 3 mm thick veneer is used as the surface layer 20, it is very resistant to warping in the width direction due to the difference in shrinkage expansion between the veneer and plywood.

The vertically laminated plywood 50 has a structure in which end plates are laminated in the vertical direction, in contrast to the usual horizontally laminated plywood 30.

The side surface of the plywood 50 may be formed with a T & G bonding structure consisting of the projections 51 and the grooves 52 for bonding between the substrate, the back surface to improve the dimensional stability of the plywood floor and adhesion to the floor A plurality of grooves 53 may be formed for the purpose. For example, the width of the grooves may be 1 to 2 mm, the height of the grooves may be 1 to 4 mm, and the interval of the grooves may be 10 to 90 mm.

4 is a cross-sectional view of a plywood floor according to another embodiment of the present invention, wherein the floor covering is composed of a surface protection layer 10, a surface layer 20 and a vertically laminated plywood 60 from above.

The side of the vertical laminated plywood 60 may be formed with a click coupling structure (61, 62) for bonding between the substrate.

The click coupling system is a non-glueless mechanical fastening system, which is a system in which both protrusions and grooves are connected in a curved shape and are formed in both a vertical direction and a horizontal direction, thereby simultaneously fastening not only in the vertical direction but also in the horizontal direction.

Specifically, for example, as disclosed in the Republic of Korea Patent No. 430315, it is applied to the hard floor panel constituting the floor cover, the panel is a long or square square, the panel has a first pair and There is a second pair of opposing sides, at least the edges of the second pair of opposing sides of the panel are provided with couplings in the form of protrusions and grooves, these couplings comprising respective fastening elements extending in the longitudinal direction of the associated edges. An integral mechanical fastening means is provided, wherein the fastening means consists of a single piece with the core of the panel, so that with these two panels connected, the coupling part, together with the fastening means, is perpendicular to the connected edge and parallel to the plane of the panel. Rather it provides fastening in a direction perpendicular to the plane of the panel, the material of the core being composed of HDF plates or MDF plates, formed from these cores The coupling portion and the connection unit is implemented enables fastening by shifting the floor panels with flat laterally toward each other element can be screwed is snap lock means two of such floor panels to each other by providing a connection in the back of the fastening.

By applying high-density solid end plates to the side edges of the vertically laminated plywood 60, the click shapes 61 and 62 can be given, thereby providing a flooring material having dimensional stability while giving a high-click click structure like a conventional reinforced floor. .

High-density veneer is a single plate with high density of 0.6 to 1.0 g / cm3, like high density fiberboard (HDF) or wood veneer, unlike ordinary single plate with density of less than 0.6 g / cm3, and can be clicked by high density Do.

5 is a manufacturing process diagram of the plywood floor according to an embodiment of the present invention, first, a plurality of end plates 70 are laminated in the horizontal direction. For example, several to tens of ordinary single plates having a thickness of 1 mm are cross laminated so that the grain direction is orthogonal. At this time, a low-cost single plate having a thickness of 2 mm may be alternately laminated between the 1 mm single plate. An adhesive is applied between each end plate and laminated, followed by compression with a thermocompressor.

Next, cutting in the vertical direction at the side edges of the laminate yields a plywood in which the end plates 70 are vertically laminated.

Next, using the obtained vertical laminated plywood 50 as a base layer, the surface layer 20 is laminated thereon, and the surface protection layer 10 is formed. A T & G coupling structure composed of the protrusion 51 and the groove 52 may be formed on the side of the vertically laminated plywood 50, and a plurality of back grooves 53 may be formed on the rear surface thereof.

6 is a manufacturing process diagram of the plywood floor according to another embodiment of the present invention, first, a plurality of end plates 70 are laminated in the horizontal direction. At this time, the high-density end plate 80 is laminated on the uppermost layer and the lowermost layer.

Next, cutting in the vertical direction at the side edges of the laminate yields a plywood in which the end plates 70 are vertically laminated and the high density end plates 80 are laminated at both side edges.

Next, using the obtained vertical laminated plywood 60 as a base layer, the surface layer 20 is laminated thereon, and the surface protection layer 10 is formed. The click coupling structures 61 and 62 may be formed at portions of the high density end plate 80 at the side edges of the vertically laminated plywood 60.

Example 1

After stacking a plurality of end plates in the transverse direction, the laminate was cut in the vertical direction at the side edges of the laminate to obtain a plywood in which the end plates were vertically laminated. The vertical laminated plywood thus obtained was used as a substrate layer, and veneer was laminated on the surface layer thereon, and a surface protective layer was formed by UV paint. The T & G bonding structure was formed on the side of the vertical laminated plywood, and a plurality of back grooves were formed on the back side to prepare a plywood floor having a structure as shown in FIG. 3.

[Example 2]

A plurality of end plates were laminated in the horizontal direction, and the high-density end plates were laminated on the uppermost layer and the lower layer, and then cut in the vertical direction at the side edges of the laminate to obtain the plywood in which the end plates were vertically stacked and the high-density single plates were laminated at both side edges. . The vertical laminated plywood thus obtained was used as a substrate layer, and veneer was laminated on the surface layer thereon, and a surface protective layer was formed by UV paint. A plywood floor having a structure as shown in FIG. 4 was manufactured by forming a click coupling structure on a high density single plate at the side edge of the vertically laminated plywood.

Comparative Example 1

As shown in Fig. 1, a laminated plywood having a T & G bonding structure and a back groove as a base layer, and laminated veneer with a surface layer thereon, and a surface protective layer formed of UV paint.

Comparative Example 2

As shown in Fig. 2, a high-density fiberboard having a click bonding structure as a base layer, a reinforcing floor formed by laminating a transfer printing layer as a surface layer thereon and forming a surface protective layer with UV paint.

[Test Example]

The warpage in the width direction was measured for the floor coverings of Examples and Comparative Examples, and the results are shown in Table 1 below. The warpage in the width direction was measured as the height from the center vertex to the floor, that is, the height lifted from the floor, when the warp was bent in a U shape or vice versa in the width direction.

Warp in the width direction Wood veneer (thickness 0.5 mm) Wood veneer (thickness 3 mm) Example 1 0.01 mm 0.1 mm Comparative Example 1 0.5 mm 3 mm

As can be seen from Table 1, the plywood floor (Example 1) according to the present invention by using a vertical laminated plywood as a substrate to prevent the warp in the width direction even when using a thick veneer. However, plywood floor (Comparative Example 1) using a conventional horizontal laminated plywood as a substrate was very vulnerable to warpage in the width direction, and more warped when the thickness of the veneer was thick.

In addition, in the case of Example 2 to which the click structure was given, the same construction speed as that of the conventional reinforced floor (Comparative Example 2) was shown.

1 is a cross-sectional view of a conventional plywood floor.

2 is a cross-sectional view of a conventional reinforced floor.

3 is a cross-sectional view of the plywood floor according to an embodiment of the present invention.

4 is a cross-sectional view of the plywood floor according to another embodiment of the present invention.

5 is a manufacturing process of the plywood floor according to an embodiment of the present invention.

Figure 6 is a manufacturing process of the plywood floor according to another embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: surface protective layer

20: surface layer

30: horizontal laminated plywood

31, 51: protrusion

32, 52: side groove

33, 53: back side groove

40: high density fiberboard

41, 42, 61, 62: click coupling structure

50, 60: vertically laminated plywood

70: veneer

80: high density veneer

Claims (9)

It consists of a surface protection layer, a surface layer, and a base material layer from the top, A plywood floor, in which a base material layer is laminated in a vertical direction, and high density end plates are attached to both sides of the base material layer. The plywood floor according to claim 1, wherein the surface layer is at least one selected from veneer, printed layer, and printed film. delete The plywood floor according to claim 1, wherein the high density end plate is a high density fiber board or a wooden end plate having a density of 0.6 to 1.0 g / cm 3. 2. The plywood floor according to claim 1, wherein the high density end plate has a click shape. The plywood floor according to claim 1, wherein the plywood floor has a T & G (Tongue and Groove) bonding structure on the side of the base layer. The plywood floor according to claim 1, wherein a groove is formed on the back surface of the base layer. delete Stacking a plurality of end plates in a horizontal direction, but stacking high density end plates on the uppermost layer and the lowermost layer; Obtaining plywood having vertical plates laminated vertically and high density single plates laminated on both sides by cutting in the vertical direction at the side edges of the laminate; Stacking a surface layer on the vertical laminated plywood as a substrate layer and forming a surface protective layer; And A method of manufacturing a plywood floor comprising the step of forming a click bonding structure on a high density single plate on the side of the vertically laminated plywood.

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